]> git.openstreetmap.org Git - rails.git/blobdiff - vendor/assets/iD/iD.js
Merge remote-tracking branch 'upstream/pull/3297'
[rails.git] / vendor / assets / iD / iD.js
index 4acb400030f075a0e55061fd09744c0fb806bb56..346fdbd662224b31a785db7b82beb06f0e2f6b4d 100644 (file)
@@ -2,22 +2,9 @@
 
        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');
+       function createCommonjsModule(fn) {
+         var module = { exports: {} };
+               return fn(module, module.exports), module.exports;
        }
 
        var check = function (it) {
        };
 
        // https://github.com/zloirock/core-js/issues/86#issuecomment-115759028
-       var global_1 =
-         // eslint-disable-next-line no-undef
+       var global$2 =
+         // 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
+         // eslint-disable-next-line no-new-func -- fallback
          (function () { return this; })() || Function('return this')();
 
        var fails = function (exec) {
          }
        };
 
-       // Thank's IE8 for his funny defineProperty
+       // Detect IE8's incomplete defineProperty implementation
        var descriptors = !fails(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 $propertyIsEnumerable$1 = {}.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$1.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
+       var f$7 = NASHORN_BUG ? function propertyIsEnumerable(V) {
+         var descriptor = getOwnPropertyDescriptor$5(this, V);
          return !!descriptor && descriptor.enumerable;
-       } : nativePropertyIsEnumerable;
+       } : $propertyIsEnumerable$1;
 
        var objectPropertyIsEnumerable = {
-               f: f
+               f: f$7
        };
 
        var createPropertyDescriptor = function (bitmap, value) {
          };
        };
 
-       var toString = {}.toString;
+       var toString$1 = {}.toString;
 
        var classofRaw = function (it) {
-         return toString.call(it).slice(8, -1);
+         return toString$1.call(it).slice(8, -1);
        };
 
-       var split = ''.split;
+       var split$1 = ''.split;
 
        // fallback for non-array-like ES3 and non-enumerable old V8 strings
        var indexedObject = fails(function () {
          // throws an error in rhino, see https://github.com/mozilla/rhino/issues/346
-         // eslint-disable-next-line no-prototype-builtins
+         // eslint-disable-next-line no-prototype-builtins -- safe
          return !Object('z').propertyIsEnumerable(0);
        }) ? function (it) {
-         return classofRaw(it) == 'String' ? split.call(it, '') : Object(it);
+         return classofRaw(it) == 'String' ? split$1.call(it, '') : Object(it);
        } : Object;
 
        // `RequireObjectCoercible` abstract operation
-       // https://tc39.github.io/ecma262/#sec-requireobjectcoercible
+       // https://tc39.es/ecma262/#sec-requireobjectcoercible
        var requireObjectCoercible = function (it) {
          if (it == undefined) throw TypeError("Can't call method on " + it);
          return it;
          return indexedObject(requireObjectCoercible(it));
        };
 
-       var isObject = function (it) {
+       var isObject$4 = function (it) {
          return typeof it === 'object' ? it !== null : typeof it === 'function';
        };
 
        // `ToPrimitive` abstract operation
-       // https://tc39.github.io/ecma262/#sec-toprimitive
+       // https://tc39.es/ecma262/#sec-toprimitive
        // instead of the ES6 spec version, we didn't implement @@toPrimitive case
        // and the second argument - flag - preferred type is a string
        var toPrimitive = function (input, PREFERRED_STRING) {
-         if (!isObject(input)) return input;
+         if (!isObject$4(input)) return input;
          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;
+         if (PREFERRED_STRING && typeof (fn = input.toString) == 'function' && !isObject$4(val = fn.call(input))) return val;
+         if (typeof (fn = input.valueOf) == 'function' && !isObject$4(val = fn.call(input))) return val;
+         if (!PREFERRED_STRING && typeof (fn = input.toString) == 'function' && !isObject$4(val = fn.call(input))) return val;
          throw TypeError("Can't convert object to primitive value");
        };
 
-       var hasOwnProperty = {}.hasOwnProperty;
+       // `ToObject` abstract operation
+       // https://tc39.es/ecma262/#sec-toobject
+       var toObject = function (argument) {
+         return Object(requireObjectCoercible(argument));
+       };
+
+       var hasOwnProperty$3 = {}.hasOwnProperty;
 
-       var has = function (it, key) {
-         return hasOwnProperty.call(it, key);
+       var has$1 = Object.hasOwn || function hasOwn(it, key) {
+         return hasOwnProperty$3.call(toObject(it), key);
        };
 
-       var document$1 = global_1.document;
+       var document$3 = global$2.document;
        // typeof document.createElement is 'object' in old IE
-       var EXISTS = isObject(document$1) && isObject(document$1.createElement);
+       var EXISTS = isObject$4(document$3) && isObject$4(document$3.createElement);
 
        var documentCreateElement = function (it) {
-         return EXISTS ? document$1.createElement(it) : {};
+         return EXISTS ? document$3.createElement(it) : {};
        };
 
        // Thank's IE8 for his funny defineProperty
        var ie8DomDefine = !descriptors && !fails(function () {
+         // eslint-disable-next-line es/no-object-defineproperty -- requied for testing
          return Object.defineProperty(documentCreateElement('div'), 'a', {
            get: function () { return 7; }
          }).a != 7;
        });
 
-       var nativeGetOwnPropertyDescriptor = Object.getOwnPropertyDescriptor;
+       // eslint-disable-next-line es/no-object-getownpropertydescriptor -- safe
+       var $getOwnPropertyDescriptor$1 = Object.getOwnPropertyDescriptor;
 
        // `Object.getOwnPropertyDescriptor` method
-       // https://tc39.github.io/ecma262/#sec-object.getownpropertydescriptor
-       var f$1 = descriptors ? nativeGetOwnPropertyDescriptor : function getOwnPropertyDescriptor(O, P) {
+       // https://tc39.es/ecma262/#sec-object.getownpropertydescriptor
+       var f$6 = descriptors ? $getOwnPropertyDescriptor$1 : function getOwnPropertyDescriptor(O, P) {
          O = toIndexedObject(O);
          P = toPrimitive(P, true);
          if (ie8DomDefine) try {
-           return nativeGetOwnPropertyDescriptor(O, P);
+           return $getOwnPropertyDescriptor$1(O, P);
          } catch (error) { /* empty */ }
-         if (has(O, P)) return createPropertyDescriptor(!objectPropertyIsEnumerable.f.call(O, P), O[P]);
+         if (has$1(O, P)) return createPropertyDescriptor(!objectPropertyIsEnumerable.f.call(O, P), O[P]);
        };
 
        var objectGetOwnPropertyDescriptor = {
-               f: f$1
+               f: f$6
        };
 
        var anObject = function (it) {
-         if (!isObject(it)) {
+         if (!isObject$4(it)) {
            throw TypeError(String(it) + ' is not an object');
          } return it;
        };
 
-       var nativeDefineProperty = Object.defineProperty;
+       // eslint-disable-next-line es/no-object-defineproperty -- safe
+       var $defineProperty$1 = Object.defineProperty;
 
        // `Object.defineProperty` method
-       // https://tc39.github.io/ecma262/#sec-object.defineproperty
-       var f$2 = descriptors ? nativeDefineProperty : function defineProperty(O, P, Attributes) {
+       // https://tc39.es/ecma262/#sec-object.defineproperty
+       var f$5 = descriptors ? $defineProperty$1 : function defineProperty(O, P, Attributes) {
          anObject(O);
          P = toPrimitive(P, true);
          anObject(Attributes);
          if (ie8DomDefine) try {
-           return nativeDefineProperty(O, P, Attributes);
+           return $defineProperty$1(O, P, Attributes);
          } catch (error) { /* empty */ }
          if ('get' in Attributes || 'set' in Attributes) throw TypeError('Accessors not supported');
          if ('value' in Attributes) O[P] = Attributes.value;
        };
 
        var objectDefineProperty = {
-               f: f$2
+               f: f$5
        };
 
        var createNonEnumerableProperty = descriptors ? function (object, key, value) {
 
        var setGlobal = function (key, value) {
          try {
-           createNonEnumerableProperty(global_1, key, value);
+           createNonEnumerableProperty(global$2, key, value);
          } catch (error) {
-           global_1[key] = value;
+           global$2[key] = value;
          } return value;
        };
 
        var SHARED = '__core-js_shared__';
-       var store = global_1[SHARED] || setGlobal(SHARED, {});
+       var store$1 = global$2[SHARED] || setGlobal(SHARED, {});
 
-       var sharedStore = store;
+       var sharedStore = store$1;
 
        var functionToString = Function.toString;
 
-       // this helper broken in `3.4.1-3.4.4`, so we can't use `shared` helper
+       // this helper broken in `core-js@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);
 
        var inspectSource = sharedStore.inspectSource;
 
-       var WeakMap = global_1.WeakMap;
+       var WeakMap$1 = global$2.WeakMap;
 
-       var nativeWeakMap = typeof WeakMap === 'function' && /native code/.test(inspectSource(WeakMap));
+       var nativeWeakMap = typeof WeakMap$1 === 'function' && /native code/.test(inspectSource(WeakMap$1));
 
        var isPure = false;
 
        (module.exports = function (key, value) {
          return sharedStore[key] || (sharedStore[key] = value !== undefined ? value : {});
        })('versions', []).push({
-         version: '3.7.0',
-         mode:  'global',
-         copyright: '© 2020 Denis Pushkarev (zloirock.ru)'
+         version: '3.15.0',
+         mode: 'global',
+         copyright: '© 2021 Denis Pushkarev (zloirock.ru)'
        });
        });
 
-       var id = 0;
+       var id$1 = 0;
        var postfix = Math.random();
 
        var uid = function (key) {
-         return 'Symbol(' + String(key === undefined ? '' : key) + ')_' + (++id + postfix).toString(36);
+         return 'Symbol(' + String(key === undefined ? '' : key) + ')_' + (++id$1 + postfix).toString(36);
        };
 
-       var keys = shared('keys');
+       var keys$3 = shared('keys');
 
        var sharedKey = function (key) {
-         return keys[key] || (keys[key] = uid(key));
+         return keys$3[key] || (keys$3[key] = uid(key));
        };
 
-       var hiddenKeys = {};
+       var hiddenKeys$1 = {};
 
-       var WeakMap$1 = global_1.WeakMap;
-       var set, get, has$1;
+       var OBJECT_ALREADY_INITIALIZED = 'Object already initialized';
+       var WeakMap = global$2.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) {
+           if (!isObject$4(it) || (state = get$5(it)).type !== TYPE) {
              throw TypeError('Incompatible receiver, ' + TYPE + ' required');
            } return state;
          };
        };
 
-       if (nativeWeakMap) {
-         var store$1 = sharedStore.state || (sharedStore.state = new WeakMap$1());
-         var wmget = store$1.get;
-         var wmhas = store$1.has;
-         var wmset = store$1.set;
-         set = function (it, metadata) {
+       if (nativeWeakMap || sharedStore.state) {
+         var store = sharedStore.state || (sharedStore.state = new WeakMap());
+         var wmget = store.get;
+         var wmhas = store.has;
+         var wmset = store.set;
+         set$4 = function (it, metadata) {
+           if (wmhas.call(store, it)) throw new TypeError(OBJECT_ALREADY_INITIALIZED);
            metadata.facade = it;
-           wmset.call(store$1, it, metadata);
+           wmset.call(store, it, metadata);
            return metadata;
          };
-         get = function (it) {
-           return wmget.call(store$1, it) || {};
+         get$5 = function (it) {
+           return wmget.call(store, it) || {};
          };
-         has$1 = function (it) {
-           return wmhas.call(store$1, it);
+         has = function (it) {
+           return wmhas.call(store, it);
          };
        } else {
          var STATE = sharedKey('state');
-         hiddenKeys[STATE] = true;
-         set = function (it, metadata) {
+         hiddenKeys$1[STATE] = true;
+         set$4 = function (it, metadata) {
+           if (has$1(it, STATE)) throw new TypeError(OBJECT_ALREADY_INITIALIZED);
            metadata.facade = it;
            createNonEnumerableProperty(it, STATE, metadata);
            return metadata;
          };
-         get = function (it) {
-           return has(it, STATE) ? it[STATE] : {};
+         get$5 = function (it) {
+           return has$1(it, STATE) ? it[STATE] : {};
          };
-         has$1 = function (it) {
-           return has(it, STATE);
+         has = function (it) {
+           return has$1(it, STATE);
          };
        }
 
        var internalState = {
-         set: set,
-         get: get,
-         has: has$1,
+         set: set$4,
+         get: get$5,
+         has: has,
          enforce: enforce,
          getterFor: getterFor
        };
          var noTargetGet = options ? !!options.noTargetGet : false;
          var state;
          if (typeof value == 'function') {
-           if (typeof key == 'string' && !has(value, 'name')) {
+           if (typeof key == 'string' && !has$1(value, 'name')) {
              createNonEnumerableProperty(value, 'name', key);
            }
            state = enforceInternalState(value);
              state.source = TEMPLATE.join(typeof key == 'string' ? key : '');
            }
          }
-         if (O === global_1) {
+         if (O === global$2) {
            if (simple) O[key] = value;
            else setGlobal(key, value);
            return;
        });
        });
 
-       var path = global_1;
+       var path = global$2;
 
-       var aFunction = function (variable) {
+       var aFunction$1 = function (variable) {
          return typeof variable == 'function' ? variable : undefined;
        };
 
        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];
+         return arguments.length < 2 ? aFunction$1(path[namespace]) || aFunction$1(global$2[namespace])
+           : path[namespace] && path[namespace][method] || global$2[namespace] && global$2[namespace][method];
        };
 
-       var ceil = Math.ceil;
-       var floor = Math.floor;
+       var ceil$1 = Math.ceil;
+       var floor$7 = Math.floor;
 
        // `ToInteger` abstract operation
-       // https://tc39.github.io/ecma262/#sec-tointeger
+       // https://tc39.es/ecma262/#sec-tointeger
        var toInteger = function (argument) {
-         return isNaN(argument = +argument) ? 0 : (argument > 0 ? floor : ceil)(argument);
+         return isNaN(argument = +argument) ? 0 : (argument > 0 ? floor$7 : ceil$1)(argument);
        };
 
-       var min = Math.min;
+       var min$9 = Math.min;
 
        // `ToLength` abstract operation
-       // https://tc39.github.io/ecma262/#sec-tolength
+       // https://tc39.es/ecma262/#sec-tolength
        var toLength = function (argument) {
-         return argument > 0 ? min(toInteger(argument), 0x1FFFFFFFFFFFFF) : 0; // 2 ** 53 - 1 == 9007199254740991
+         return argument > 0 ? min$9(toInteger(argument), 0x1FFFFFFFFFFFFF) : 0; // 2 ** 53 - 1 == 9007199254740991
        };
 
-       var max = Math.max;
-       var min$1 = Math.min;
+       var max$4 = Math.max;
+       var min$8 = Math.min;
 
        // 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);
+         return integer < 0 ? max$4(integer + length, 0) : min$8(integer, length);
        };
 
        // `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 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++) {
 
        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 i = 0;
          var result = [];
          var key;
-         for (key in O) !has(hiddenKeys, key) && has(O, key) && result.push(key);
+         for (key in O) !has$1(hiddenKeys$1, key) && has$1(O, key) && result.push(key);
          // Don't enum bug & hidden keys
-         while (names.length > i) if (has(O, key = names[i++])) {
+         while (names.length > i) if (has$1(O, key = names[i++])) {
            ~indexOf(result, key) || result.push(key);
          }
          return result;
          'valueOf'
        ];
 
-       var hiddenKeys$1 = enumBugKeys.concat('length', 'prototype');
+       var hiddenKeys = enumBugKeys.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
+       var f$4 = Object.getOwnPropertyNames || function getOwnPropertyNames(O) {
+         return objectKeysInternal(O, hiddenKeys);
        };
 
        var objectGetOwnPropertyNames = {
-               f: f$3
+               f: f$4
        };
 
-       var f$4 = Object.getOwnPropertySymbols;
+       // eslint-disable-next-line es/no-object-getownpropertysymbols -- safe
+       var f$3 = Object.getOwnPropertySymbols;
 
        var objectGetOwnPropertySymbols = {
-               f: f$4
+               f: f$3
        };
 
        // all object keys, includes non-enumerable and symbols
          var getOwnPropertyDescriptor = objectGetOwnPropertyDescriptor.f;
          for (var i = 0; i < keys.length; i++) {
            var key = keys[i];
-           if (!has(target, key)) defineProperty(target, key, getOwnPropertyDescriptor(source, key));
+           if (!has$1(target, key)) defineProperty(target, key, getOwnPropertyDescriptor(source, key));
          }
        };
 
        var replacement = /#|\.prototype\./;
 
        var isForced = function (feature, detection) {
-         var value = data[normalize(feature)];
+         var value = data[normalize$1(feature)];
          return value == POLYFILL ? true
            : value == NATIVE ? false
            : typeof detection == 'function' ? fails(detection)
            : !!detection;
        };
 
-       var normalize = isForced.normalize = function (string) {
+       var normalize$1 = isForced.normalize = function (string) {
          return String(string).replace(replacement, '.').toLowerCase();
        };
 
 
        var isForced_1 = isForced;
 
-       var getOwnPropertyDescriptor$1 = objectGetOwnPropertyDescriptor.f;
+       var getOwnPropertyDescriptor$4 = objectGetOwnPropertyDescriptor.f;
 
 
 
          var STATIC = options.stat;
          var FORCED, target, key, targetProperty, sourceProperty, descriptor;
          if (GLOBAL) {
-           target = global_1;
+           target = global$2;
          } else if (STATIC) {
-           target = global_1[TARGET] || setGlobal(TARGET, {});
+           target = global$2[TARGET] || setGlobal(TARGET, {});
          } else {
-           target = (global_1[TARGET] || {}).prototype;
+           target = (global$2[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);
        };
 
        // `Date.now` method
-       // https://tc39.github.io/ecma262/#sec-date.now
+       // https://tc39.es/ecma262/#sec-date.now
        _export({ target: 'Date', stat: true }, {
          now: function now() {
            return new Date().getTime();
          }
        });
 
-       var DatePrototype = Date.prototype;
+       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 nativeDateToString = DatePrototype$1[TO_STRING$1];
+       var getTime$1 = DatePrototype$1.getTime;
 
        // `Date.prototype.toString` method
-       // https://tc39.github.io/ecma262/#sec-date.prototype.tostring
+       // https://tc39.es/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
+         redefine(DatePrototype$1, TO_STRING$1, function toString() {
+           var value = getTime$1.call(this);
+           // eslint-disable-next-line no-self-compare -- NaN check
            return value === value ? nativeDateToString.call(this) : INVALID_DATE;
          });
        }
 
+       function _typeof(obj) {
+         "@babel/helpers - typeof";
+
+         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 _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);
+         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 engineUserAgent = getBuiltIn('navigator', 'userAgent') || '';
+
+       var process$4 = global$2.process;
+       var versions = process$4 && process$4.versions;
+       var v8 = versions && versions.v8;
+       var match, version$1;
+
+       if (v8) {
+         match = v8.split('.');
+         version$1 = match[0] < 4 ? 1 : 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$1 = match[1];
+         }
+       }
+
+       var engineV8Version = version$1 && +version$1;
+
+       /* eslint-disable es/no-symbol -- required for testing */
+
+       // eslint-disable-next-line es/no-object-getownpropertysymbols -- required for testing
        var nativeSymbol = !!Object.getOwnPropertySymbols && !fails(function () {
+         var symbol = Symbol();
          // Chrome 38 Symbol has incorrect toString conversion
-         // eslint-disable-next-line no-undef
-         return !String(Symbol());
+         // `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 && engineV8Version && engineV8Version < 41;
        });
 
+       /* eslint-disable es/no-symbol -- required for testing */
+
        var useSymbolAsUid = nativeSymbol
-         // eslint-disable-next-line no-undef
          && !Symbol.sham
-         // eslint-disable-next-line no-undef
          && typeof Symbol.iterator == 'symbol';
 
-       // `IsArray` abstract operation
-       // https://tc39.github.io/ecma262/#sec-isarray
-       var isArray = Array.isArray || function isArray(arg) {
-         return classofRaw(arg) == 'Array';
+       var WellKnownSymbolsStore$1 = shared('wks');
+       var Symbol$1 = global$2.Symbol;
+       var createWellKnownSymbol = useSymbolAsUid ? Symbol$1 : Symbol$1 && Symbol$1.withoutSetter || uid;
+
+       var wellKnownSymbol = function (name) {
+         if (!has$1(WellKnownSymbolsStore$1, name) || !(nativeSymbol || typeof WellKnownSymbolsStore$1[name] == 'string')) {
+           if (nativeSymbol && has$1(Symbol$1, name)) {
+             WellKnownSymbolsStore$1[name] = Symbol$1[name];
+           } else {
+             WellKnownSymbolsStore$1[name] = createWellKnownSymbol('Symbol.' + name);
+           }
+         } return WellKnownSymbolsStore$1[name];
        };
 
-       // `ToObject` abstract operation
-       // https://tc39.github.io/ecma262/#sec-toobject
-       var toObject = function (argument) {
-         return Object(requireObjectCoercible(argument));
+       var f$2 = wellKnownSymbol;
+
+       var wellKnownSymbolWrapped = {
+               f: f$2
+       };
+
+       var defineProperty$9 = objectDefineProperty.f;
+
+       var defineWellKnownSymbol = function (NAME) {
+         var Symbol = path.Symbol || (path.Symbol = {});
+         if (!has$1(Symbol, NAME)) defineProperty$9(Symbol, NAME, {
+           value: wellKnownSymbolWrapped.f(NAME)
+         });
        };
 
+       // `Symbol.iterator` well-known symbol
+       // https://tc39.es/ecma262/#sec-symbol.iterator
+       defineWellKnownSymbol('iterator');
+
        // `Object.keys` method
-       // https://tc39.github.io/ecma262/#sec-object.keys
+       // https://tc39.es/ecma262/#sec-object.keys
+       // eslint-disable-next-line es/no-object-keys -- safe
        var objectKeys = Object.keys || function keys(O) {
          return objectKeysInternal(O, enumBugKeys);
        };
 
        // `Object.defineProperties` method
-       // https://tc39.github.io/ecma262/#sec-object.defineproperties
+       // https://tc39.es/ecma262/#sec-object.defineproperties
+       // eslint-disable-next-line es/no-object-defineproperties -- safe
        var objectDefineProperties = descriptors ? Object.defineProperties : function defineProperties(O, Properties) {
          anObject(O);
          var keys = objectKeys(Properties);
 
        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('IE_PROTO');
 
        var EmptyConstructor = function () { /* empty */ };
 
        var activeXDocument;
        var NullProtoObject = function () {
          try {
-           /* global ActiveXObject */
+           /* global ActiveXObject -- old IE */
            activeXDocument = document.domain && new ActiveXObject('htmlfile');
          } catch (error) { /* ignore */ }
          NullProtoObject = activeXDocument ? NullProtoObjectViaActiveX(activeXDocument) : NullProtoObjectViaIFrame();
          var length = enumBugKeys.length;
-         while (length--) delete NullProtoObject[PROTOTYPE][enumBugKeys[length]];
+         while (length--) delete NullProtoObject[PROTOTYPE$2][enumBugKeys[length]];
          return NullProtoObject();
        };
 
-       hiddenKeys[IE_PROTO] = true;
+       hiddenKeys$1[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(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);
        };
 
-       var nativeGetOwnPropertyNames = objectGetOwnPropertyNames.f;
-
-       var toString$1 = {}.toString;
+       var UNSCOPABLES = wellKnownSymbol('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) {
+         objectDefineProperty.f(ArrayPrototype$1, UNSCOPABLES, {
+           configurable: true,
+           value: objectCreate(null)
+         });
+       }
 
-       var getWindowNames = function (it) {
-         try {
-           return nativeGetOwnPropertyNames(it);
-         } catch (error) {
-           return windowNames.slice();
-         }
+       // add a key to Array.prototype[@@unscopables]
+       var addToUnscopables = 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 correctPrototypeGetter = !fails(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 WellKnownSymbolsStore = shared('wks');
-       var Symbol$1 = global_1.Symbol;
-       var createWellKnownSymbol = useSymbolAsUid ? Symbol$1 : Symbol$1 && Symbol$1.withoutSetter || uid;
+       var IE_PROTO = sharedKey('IE_PROTO');
+       var ObjectPrototype$3 = Object.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];
+       // `Object.getPrototypeOf` method
+       // https://tc39.es/ecma262/#sec-object.getprototypeof
+       // eslint-disable-next-line es/no-object-getprototypeof -- safe
+       var objectGetPrototypeOf = correctPrototypeGetter ? Object.getPrototypeOf : function (O) {
+         O = toObject(O);
+         if (has$1(O, IE_PROTO)) return O[IE_PROTO];
+         if (typeof O.constructor == 'function' && O instanceof O.constructor) {
+           return O.constructor.prototype;
+         } return O instanceof Object ? ObjectPrototype$3 : null;
        };
 
-       var f$6 = wellKnownSymbol;
-
-       var wellKnownSymbolWrapped = {
-               f: f$6
-       };
+       var ITERATOR$8 = wellKnownSymbol('iterator');
+       var BUGGY_SAFARI_ITERATORS$1 = false;
 
-       var defineProperty = objectDefineProperty.f;
+       var returnThis$2 = function () { return this; };
 
-       var defineWellKnownSymbol = function (NAME) {
-         var Symbol = path.Symbol || (path.Symbol = {});
-         if (!has(Symbol, NAME)) defineProperty(Symbol, NAME, {
-           value: wellKnownSymbolWrapped.f(NAME)
-         });
-       };
+       // `%IteratorPrototype%` object
+       // https://tc39.es/ecma262/#sec-%iteratorprototype%-object
+       var IteratorPrototype$2, PrototypeOfArrayIteratorPrototype, arrayIterator;
 
-       var defineProperty$1 = objectDefineProperty.f;
+       /* 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 = objectGetPrototypeOf(objectGetPrototypeOf(arrayIterator));
+           if (PrototypeOfArrayIteratorPrototype !== Object.prototype) IteratorPrototype$2 = PrototypeOfArrayIteratorPrototype;
+         }
+       }
 
+       var NEW_ITERATOR_PROTOTYPE = IteratorPrototype$2 == undefined || fails(function () {
+         var test = {};
+         // FF44- legacy iterators case
+         return IteratorPrototype$2[ITERATOR$8].call(test) !== test;
+       });
 
+       if (NEW_ITERATOR_PROTOTYPE) IteratorPrototype$2 = {};
 
-       var TO_STRING_TAG = wellKnownSymbol('toStringTag');
+       // `%IteratorPrototype%[@@iterator]()` method
+       // https://tc39.es/ecma262/#sec-%iteratorprototype%-@@iterator
+       if (!has$1(IteratorPrototype$2, ITERATOR$8)) {
+         createNonEnumerableProperty(IteratorPrototype$2, ITERATOR$8, returnThis$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 });
-         }
+       var iteratorsCore = {
+         IteratorPrototype: IteratorPrototype$2,
+         BUGGY_SAFARI_ITERATORS: BUGGY_SAFARI_ITERATORS$1
        };
 
-       var aFunction$1 = function (it) {
-         if (typeof it != 'function') {
-           throw TypeError(String(it) + ' is not a function');
-         } return it;
-       };
+       var defineProperty$8 = objectDefineProperty.f;
 
-       // 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 SPECIES = wellKnownSymbol('species');
 
-       // `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 TO_STRING_TAG$4 = wellKnownSymbol('toStringTag');
+
+       var setToStringTag = function (it, TAG, STATIC) {
+         if (it && !has$1(it = STATIC ? it : it.prototype, TO_STRING_TAG$4)) {
+           defineProperty$8(it, TO_STRING_TAG$4, { configurable: true, value: TAG });
+         }
        };
 
-       var push = [].push;
+       var IteratorPrototype$1 = iteratorsCore.IteratorPrototype;
 
-       // `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 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 $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;
 
-       // 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 returnThis$1 = function () { return this; };
 
-       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 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 isSymbol = useSymbolAsUid ? function (it) {
-         return typeof it == 'symbol';
-       } : function (it) {
-         return Object(it) instanceof $Symbol;
+       var aPossiblePrototype = function (it) {
+         if (!isObject$4(it) && it !== null) {
+           throw TypeError("Can't set " + String(it) + ' as a prototype');
+         } return it;
        };
 
-       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;
-           } else {
-             if (has(O, HIDDEN) && O[HIDDEN][key]) O[HIDDEN][key] = false;
-             Attributes = objectCreate(Attributes, { enumerable: createPropertyDescriptor(0, false) });
-           } return setSymbolDescriptor(O, key, Attributes);
-         } return nativeDefineProperty$1(O, key, Attributes);
-       };
+       /* eslint-disable no-proto -- safe */
 
-       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]);
-         });
-         return O;
-       };
+       // `Object.setPrototypeOf` method
+       // https://tc39.es/ecma262/#sec-object.setprototypeof
+       // Works with __proto__ only. Old v8 can't work with null proto objects.
+       // eslint-disable-next-line es/no-object-setprototypeof -- safe
+       var objectSetPrototypeOf = Object.setPrototypeOf || ('__proto__' in {} ? function () {
+         var CORRECT_SETTER = false;
+         var test = {};
+         var setter;
+         try {
+           // eslint-disable-next-line es/no-object-getownpropertydescriptor -- safe
+           setter = Object.getOwnPropertyDescriptor(Object.prototype, '__proto__').set;
+           setter.call(test, []);
+           CORRECT_SETTER = test instanceof Array;
+         } catch (error) { /* empty */ }
+         return function setPrototypeOf(O, proto) {
+           anObject(O);
+           aPossiblePrototype(proto);
+           if (CORRECT_SETTER) setter.call(O, proto);
+           else O.__proto__ = proto;
+           return O;
+         };
+       }() : undefined);
 
-       var $create = function create(O, Properties) {
-         return Properties === undefined ? objectCreate(O) : $defineProperties(objectCreate(O), Properties);
-       };
+       var IteratorPrototype = iteratorsCore.IteratorPrototype;
+       var BUGGY_SAFARI_ITERATORS = iteratorsCore.BUGGY_SAFARI_ITERATORS;
+       var ITERATOR$7 = wellKnownSymbol('iterator');
+       var KEYS = 'keys';
+       var VALUES = 'values';
+       var ENTRIES = 'entries';
 
-       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 returnThis = function () { return this; };
 
-       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])) {
-           descriptor.enumerable = true;
-         }
-         return descriptor;
-       };
+       var defineIterator = function (Iterable, NAME, IteratorConstructor, next, DEFAULT, IS_SET, FORCED) {
+         createIteratorConstructor(IteratorConstructor, NAME, next);
 
-       var $getOwnPropertyNames = function getOwnPropertyNames(O) {
-         var names = nativeGetOwnPropertyNames$1(toIndexedObject(O));
+         var getIterationMethod = function (KIND) {
+           if (KIND === DEFAULT && defaultIterator) return defaultIterator;
+           if (!BUGGY_SAFARI_ITERATORS && KIND in IterablePrototype) return IterablePrototype[KIND];
+           switch (KIND) {
+             case KEYS: return function keys() { return new IteratorConstructor(this, KIND); };
+             case VALUES: return function values() { return new IteratorConstructor(this, KIND); };
+             case ENTRIES: return function entries() { return new IteratorConstructor(this, KIND); };
+           } return function () { return new IteratorConstructor(this); };
+         };
+
+         var TO_STRING_TAG = NAME + ' Iterator';
+         var INCORRECT_VALUES_NAME = false;
+         var IterablePrototype = Iterable.prototype;
+         var nativeIterator = IterablePrototype[ITERATOR$7]
+           || IterablePrototype['@@iterator']
+           || DEFAULT && IterablePrototype[DEFAULT];
+         var defaultIterator = !BUGGY_SAFARI_ITERATORS && nativeIterator || getIterationMethod(DEFAULT);
+         var anyNativeIterator = NAME == 'Array' ? IterablePrototype.entries || nativeIterator : nativeIterator;
+         var CurrentIteratorPrototype, methods, KEY;
+
+         // fix native
+         if (anyNativeIterator) {
+           CurrentIteratorPrototype = objectGetPrototypeOf(anyNativeIterator.call(new Iterable()));
+           if (IteratorPrototype !== Object.prototype && CurrentIteratorPrototype.next) {
+             if (objectGetPrototypeOf(CurrentIteratorPrototype) !== IteratorPrototype) {
+               if (objectSetPrototypeOf) {
+                 objectSetPrototypeOf(CurrentIteratorPrototype, IteratorPrototype);
+               } else if (typeof CurrentIteratorPrototype[ITERATOR$7] != 'function') {
+                 createNonEnumerableProperty(CurrentIteratorPrototype, ITERATOR$7, returnThis);
+               }
+             }
+             // Set @@toStringTag to native iterators
+             setToStringTag(CurrentIteratorPrototype, TO_STRING_TAG, true);
+           }
+         }
+
+         // fix Array.prototype.{ values, @@iterator }.name in V8 / FF
+         if (DEFAULT == VALUES && nativeIterator && nativeIterator.name !== VALUES) {
+           INCORRECT_VALUES_NAME = true;
+           defaultIterator = function values() { return nativeIterator.call(this); };
+         }
+
+         // define iterator
+         if (IterablePrototype[ITERATOR$7] !== defaultIterator) {
+           createNonEnumerableProperty(IterablePrototype, ITERATOR$7, 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 || INCORRECT_VALUES_NAME || !(KEY in IterablePrototype)) {
+               redefine(IterablePrototype, KEY, methods[KEY]);
+             }
+           } else _export({ target: NAME, proto: true, forced: BUGGY_SAFARI_ITERATORS || INCORRECT_VALUES_NAME }, methods);
+         }
+
+         return methods;
+       };
+
+       var ARRAY_ITERATOR = 'Array Iterator';
+       var setInternalState$7 = internalState.set;
+       var getInternalState$5 = internalState.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(Array, 'Array', function (iterated, kind) {
+         setInternalState$7(this, {
+           type: ARRAY_ITERATOR,
+           target: toIndexedObject(iterated), // target
+           index: 0,                          // next index
+           kind: kind                         // kind
+         });
+       // `%ArrayIteratorPrototype%.next` method
+       // https://tc39.es/ecma262/#sec-%arrayiteratorprototype%.next
+       }, function () {
+         var state = getInternalState$5(this);
+         var target = state.target;
+         var kind = state.kind;
+         var index = state.index++;
+         if (!target || index >= target.length) {
+           state.target = undefined;
+           return { value: undefined, done: true };
+         }
+         if (kind == 'keys') return { value: index, done: false };
+         if (kind == 'values') return { value: target[index], done: false };
+         return { value: [index, target[index]], done: false };
+       }, 'values');
+
+       // argumentsList[@@iterator] is %ArrayProto_values%
+       // https://tc39.es/ecma262/#sec-createunmappedargumentsobject
+       // https://tc39.es/ecma262/#sec-createmappedargumentsobject
+       iterators.Arguments = iterators.Array;
+
+       // https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
+       addToUnscopables('keys');
+       addToUnscopables('values');
+       addToUnscopables('entries');
+
+       var TO_STRING_TAG$3 = wellKnownSymbol('toStringTag');
+       var test$2 = {};
+
+       test$2[TO_STRING_TAG$3] = 'z';
+
+       var toStringTagSupport = String(test$2) === '[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;
+       };
+
+       // `Object.prototype.toString` method implementation
+       // https://tc39.es/ecma262/#sec-object.prototype.tostring
+       var objectToString$1 = toStringTagSupport ? {}.toString : function toString() {
+         return '[object ' + classof(this) + ']';
+       };
+
+       // `Object.prototype.toString` method
+       // https://tc39.es/ecma262/#sec-object.prototype.tostring
+       if (!toStringTagSupport) {
+         redefine(Object.prototype, 'toString', objectToString$1, { unsafe: true });
+       }
+
+       // `String.prototype.{ codePointAt, at }` methods implementation
+       var createMethod$5 = function (CONVERT_TO_STRING) {
+         return function ($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 stringMultibyte = {
+         // `String.prototype.codePointAt` method
+         // https://tc39.es/ecma262/#sec-string.prototype.codepointat
+         codeAt: createMethod$5(false),
+         // `String.prototype.at` method
+         // https://github.com/mathiasbynens/String.prototype.at
+         charAt: createMethod$5(true)
+       };
+
+       var charAt$1 = stringMultibyte.charAt;
+
+
+
+       var STRING_ITERATOR = 'String Iterator';
+       var setInternalState$6 = internalState.set;
+       var getInternalState$4 = internalState.getterFor(STRING_ITERATOR);
+
+       // `String.prototype[@@iterator]` method
+       // https://tc39.es/ecma262/#sec-string.prototype-@@iterator
+       defineIterator(String, 'String', function (iterated) {
+         setInternalState$6(this, {
+           type: STRING_ITERATOR,
+           string: String(iterated),
+           index: 0
+         });
+       // `%StringIteratorPrototype%.next` method
+       // https://tc39.es/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$1(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
+       };
+
+       var ITERATOR$6 = wellKnownSymbol('iterator');
+       var TO_STRING_TAG$1 = wellKnownSymbol('toStringTag');
+       var ArrayValues = es_array_iterator.values;
+
+       for (var COLLECTION_NAME$1 in domIterables) {
+         var Collection$1 = global$2[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$1]) {
+             createNonEnumerableProperty(CollectionPrototype$1, TO_STRING_TAG$1, 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]);
+             } catch (error) {
+               CollectionPrototype$1[METHOD_NAME] = es_array_iterator[METHOD_NAME];
+             }
+           }
+         }
+       }
+
+       // `IsArray` abstract operation
+       // https://tc39.es/ecma262/#sec-isarray
+       // eslint-disable-next-line es/no-array-isarray -- safe
+       var isArray = Array.isArray || function isArray(arg) {
+         return classofRaw(arg) == 'Array';
+       };
+
+       /* eslint-disable es/no-object-getownpropertynames -- safe */
+
+       var $getOwnPropertyNames$1 = objectGetOwnPropertyNames.f;
+
+       var toString = {}.toString;
+
+       var windowNames = typeof window == 'object' && window && Object.getOwnPropertyNames
+         ? Object.getOwnPropertyNames(window) : [];
+
+       var getWindowNames = function (it) {
+         try {
+           return $getOwnPropertyNames$1(it);
+         } catch (error) {
+           return windowNames.slice();
+         }
+       };
+
+       // fallback for IE11 buggy Object.getOwnPropertyNames with iframe and window
+       var f$1 = function getOwnPropertyNames(it) {
+         return windowNames && toString.call(it) == '[object Window]'
+           ? getWindowNames(it)
+           : $getOwnPropertyNames$1(toIndexedObject(it));
+       };
+
+       var objectGetOwnPropertyNamesExternal = {
+               f: f$1
+       };
+
+       var aFunction = function (it) {
+         if (typeof it != 'function') {
+           throw TypeError(String(it) + ' is not a function');
+         } return it;
+       };
+
+       // optional / simple context binding
+       var functionBindContext = function (fn, that, length) {
+         aFunction(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 SPECIES$6 = wellKnownSymbol('species');
+
+       // `ArraySpeciesCreate` abstract operation
+       // https://tc39.es/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$4(C)) {
+             C = C[SPECIES$6];
+             if (C === null) C = undefined;
+           }
+         } return new (C === undefined ? Array : C)(length === 0 ? 0 : length);
+       };
+
+       var push = [].push;
+
+       // `Array.prototype.{ forEach, map, filter, some, every, find, findIndex, filterOut }` methods implementation
+       var createMethod$4 = function (TYPE) {
+         var IS_MAP = TYPE == 1;
+         var IS_FILTER = TYPE == 2;
+         var IS_SOME = TYPE == 3;
+         var IS_EVERY = TYPE == 4;
+         var IS_FIND_INDEX = TYPE == 6;
+         var IS_FILTER_OUT = TYPE == 7;
+         var NO_HOLES = TYPE == 5 || IS_FIND_INDEX;
+         return function ($this, callbackfn, that, specificCreate) {
+           var O = toObject($this);
+           var self = indexedObject(O);
+           var boundFunction = functionBindContext(callbackfn, that, 3);
+           var length = toLength(self.length);
+           var index = 0;
+           var create = specificCreate || arraySpeciesCreate;
+           var target = IS_MAP ? create($this, length) : IS_FILTER || IS_FILTER_OUT ? create($this, 0) : undefined;
+           var value, result;
+           for (;length > index; index++) if (NO_HOLES || index in self) {
+             value = self[index];
+             result = boundFunction(value, index, O);
+             if (TYPE) {
+               if (IS_MAP) target[index] = result; // map
+               else if (result) switch (TYPE) {
+                 case 3: return true;              // some
+                 case 5: return value;             // find
+                 case 6: return index;             // findIndex
+                 case 2: push.call(target, value); // filter
+               } else switch (TYPE) {
+                 case 4: return false;             // every
+                 case 7: push.call(target, value); // filterOut
+               }
+             }
+           }
+           return IS_FIND_INDEX ? -1 : IS_SOME || IS_EVERY ? IS_EVERY : target;
+         };
+       };
+
+       var arrayIteration = {
+         // `Array.prototype.forEach` method
+         // https://tc39.es/ecma262/#sec-array.prototype.foreach
+         forEach: createMethod$4(0),
+         // `Array.prototype.map` method
+         // https://tc39.es/ecma262/#sec-array.prototype.map
+         map: createMethod$4(1),
+         // `Array.prototype.filter` method
+         // https://tc39.es/ecma262/#sec-array.prototype.filter
+         filter: createMethod$4(2),
+         // `Array.prototype.some` method
+         // https://tc39.es/ecma262/#sec-array.prototype.some
+         some: createMethod$4(3),
+         // `Array.prototype.every` method
+         // https://tc39.es/ecma262/#sec-array.prototype.every
+         every: createMethod$4(4),
+         // `Array.prototype.find` method
+         // https://tc39.es/ecma262/#sec-array.prototype.find
+         find: createMethod$4(5),
+         // `Array.prototype.findIndex` method
+         // https://tc39.es/ecma262/#sec-array.prototype.findIndex
+         findIndex: createMethod$4(6),
+         // `Array.prototype.filterOut` method
+         // https://github.com/tc39/proposal-array-filtering
+         filterOut: createMethod$4(7)
+       };
+
+       var $forEach$2 = arrayIteration.forEach;
+
+       var HIDDEN = sharedKey('hidden');
+       var SYMBOL = 'Symbol';
+       var PROTOTYPE$1 = 'prototype';
+       var TO_PRIMITIVE = wellKnownSymbol('toPrimitive');
+       var setInternalState$5 = internalState.set;
+       var getInternalState$3 = internalState.getterFor(SYMBOL);
+       var ObjectPrototype$2 = Object[PROTOTYPE$1];
+       var $Symbol = global$2.Symbol;
+       var $stringify = getBuiltIn('JSON', 'stringify');
+       var nativeGetOwnPropertyDescriptor$1 = objectGetOwnPropertyDescriptor.f;
+       var nativeDefineProperty = objectDefineProperty.f;
+       var nativeGetOwnPropertyNames = objectGetOwnPropertyNamesExternal.f;
+       var nativePropertyIsEnumerable = 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 = shared('wks');
+       var QObject = global$2.QObject;
+       // Don't use setters in Qt Script, https://github.com/zloirock/core-js/issues/173
+       var USE_SETTER = !QObject || !QObject[PROTOTYPE$1] || !QObject[PROTOTYPE$1].findChild;
+
+       // fallback for old Android, https://code.google.com/p/v8/issues/detail?id=687
+       var setSymbolDescriptor = descriptors && fails(function () {
+         return objectCreate(nativeDefineProperty({}, 'a', {
+           get: function () { return nativeDefineProperty(this, 'a', { value: 7 }).a; }
+         })).a != 7;
+       }) ? function (O, P, Attributes) {
+         var ObjectPrototypeDescriptor = nativeGetOwnPropertyDescriptor$1(ObjectPrototype$2, P);
+         if (ObjectPrototypeDescriptor) delete ObjectPrototype$2[P];
+         nativeDefineProperty(O, P, Attributes);
+         if (ObjectPrototypeDescriptor && O !== ObjectPrototype$2) {
+           nativeDefineProperty(ObjectPrototype$2, P, ObjectPrototypeDescriptor);
+         }
+       } : nativeDefineProperty;
+
+       var wrap$2 = function (tag, description) {
+         var symbol = AllSymbols[tag] = objectCreate($Symbol[PROTOTYPE$1]);
+         setInternalState$5(symbol, {
+           type: SYMBOL,
+           tag: tag,
+           description: description
+         });
+         if (!descriptors) symbol.description = description;
+         return symbol;
+       };
+
+       var isSymbol$1 = useSymbolAsUid ? function (it) {
+         return typeof it == 'symbol';
+       } : function (it) {
+         return Object(it) instanceof $Symbol;
+       };
+
+       var $defineProperty = function defineProperty(O, P, Attributes) {
+         if (O === ObjectPrototype$2) $defineProperty(ObjectPrototypeSymbols, P, Attributes);
+         anObject(O);
+         var key = toPrimitive(P, true);
+         anObject(Attributes);
+         if (has$1(AllSymbols, key)) {
+           if (!Attributes.enumerable) {
+             if (!has$1(O, HIDDEN)) nativeDefineProperty(O, HIDDEN, createPropertyDescriptor(1, {}));
+             O[HIDDEN][key] = true;
+           } else {
+             if (has$1(O, HIDDEN) && O[HIDDEN][key]) O[HIDDEN][key] = false;
+             Attributes = objectCreate(Attributes, { enumerable: createPropertyDescriptor(0, false) });
+           } return setSymbolDescriptor(O, key, Attributes);
+         } return nativeDefineProperty(O, key, Attributes);
+       };
+
+       var $defineProperties = function defineProperties(O, Properties) {
+         anObject(O);
+         var properties = toIndexedObject(Properties);
+         var keys = objectKeys(properties).concat($getOwnPropertySymbols(properties));
+         $forEach$2(keys, function (key) {
+           if (!descriptors || $propertyIsEnumerable.call(properties, key)) $defineProperty(O, key, properties[key]);
+         });
+         return O;
+       };
+
+       var $create = function create(O, Properties) {
+         return Properties === undefined ? objectCreate(O) : $defineProperties(objectCreate(O), Properties);
+       };
+
+       var $propertyIsEnumerable = function propertyIsEnumerable(V) {
+         var P = toPrimitive(V, true);
+         var enumerable = nativePropertyIsEnumerable.call(this, P);
+         if (this === ObjectPrototype$2 && has$1(AllSymbols, P) && !has$1(ObjectPrototypeSymbols, P)) return false;
+         return enumerable || !has$1(this, P) || !has$1(AllSymbols, P) || has$1(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$2 && has$1(AllSymbols, key) && !has$1(ObjectPrototypeSymbols, key)) return;
+         var descriptor = nativeGetOwnPropertyDescriptor$1(it, key);
+         if (descriptor && has$1(AllSymbols, key) && !(has$1(it, HIDDEN) && it[HIDDEN][key])) {
+           descriptor.enumerable = true;
+         }
+         return descriptor;
+       };
+
+       var $getOwnPropertyNames = function getOwnPropertyNames(O) {
+         var names = nativeGetOwnPropertyNames(toIndexedObject(O));
          var result = [];
-         $forEach(names, function (key) {
-           if (!has(AllSymbols, key) && !has(hiddenKeys, key)) result.push(key);
+         $forEach$2(names, function (key) {
+           if (!has$1(AllSymbols, key) && !has$1(hiddenKeys$1, key)) result.push(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$2;
+         var names = nativeGetOwnPropertyNames(IS_OBJECT_PROTOTYPE ? ObjectPrototypeSymbols : toIndexedObject(O));
          var result = [];
-         $forEach(names, function (key) {
-           if (has(AllSymbols, key) && (!IS_OBJECT_PROTOTYPE || has(ObjectPrototype, key))) {
+         $forEach$2(names, function (key) {
+           if (has$1(AllSymbols, key) && (!IS_OBJECT_PROTOTYPE || has$1(ObjectPrototype$2, key))) {
              result.push(AllSymbols[key]);
            }
          });
        };
 
        // `Symbol` constructor
-       // https://tc39.github.io/ecma262/#sec-symbol-constructor
+       // https://tc39.es/ecma262/#sec-symbol-constructor
        if (!nativeSymbol) {
          $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);
            var setter = function (value) {
-             if (this === ObjectPrototype) setter.call(ObjectPrototypeSymbols, value);
-             if (has(this, HIDDEN) && has(this[HIDDEN], tag)) this[HIDDEN][tag] = false;
+             if (this === ObjectPrototype$2) setter.call(ObjectPrototypeSymbols, value);
+             if (has$1(this, HIDDEN) && has$1(this[HIDDEN], tag)) this[HIDDEN][tag] = false;
              setSymbolDescriptor(this, tag, createPropertyDescriptor(1, value));
            };
-           if (descriptors && USE_SETTER) setSymbolDescriptor(ObjectPrototype, tag, { configurable: true, set: setter });
-           return wrap(tag, description);
+           if (descriptors && USE_SETTER) setSymbolDescriptor(ObjectPrototype$2, tag, { configurable: true, set: setter });
+           return wrap$2(tag, description);
          };
 
          redefine($Symbol[PROTOTYPE$1], 'toString', function toString() {
-           return getInternalState(this).tag;
+           return getInternalState$3(this).tag;
          });
 
          redefine($Symbol, 'withoutSetter', function (description) {
-           return wrap(uid(description), description);
+           return wrap$2(uid(description), description);
          });
 
          objectPropertyIsEnumerable.f = $propertyIsEnumerable;
          objectGetOwnPropertySymbols.f = $getOwnPropertySymbols;
 
          wellKnownSymbolWrapped.f = function (name) {
-           return wrap(wellKnownSymbol(name), name);
+           return wrap$2(wellKnownSymbol(name), name);
          };
 
          if (descriptors) {
            // https://github.com/tc39/proposal-Symbol-description
-           nativeDefineProperty$1($Symbol[PROTOTYPE$1], 'description', {
+           nativeDefineProperty($Symbol[PROTOTYPE$1], 'description', {
              configurable: true,
              get: function description() {
-               return getInternalState(this).description;
+               return getInternalState$3(this).description;
              }
            });
            {
-             redefine(ObjectPrototype, 'propertyIsEnumerable', $propertyIsEnumerable, { unsafe: true });
+             redefine(ObjectPrototype$2, 'propertyIsEnumerable', $propertyIsEnumerable, { unsafe: true });
            }
          }
        }
          Symbol: $Symbol
        });
 
-       $forEach(objectKeys(WellKnownSymbolsStore$1), function (name) {
+       $forEach$2(objectKeys(WellKnownSymbolsStore), function (name) {
          defineWellKnownSymbol(name);
        });
 
        _export({ target: SYMBOL, stat: true, forced: !nativeSymbol }, {
          // `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];
+           if (has$1(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$1(sym)) throw TypeError(sym + ' is not a symbol');
+           if (has$1(SymbolToStringRegistry, sym)) return SymbolToStringRegistry[sym];
          },
          useSetter: function () { USE_SETTER = true; },
          useSimple: function () { USE_SETTER = false; }
 
        _export({ target: 'Object', stat: true, forced: !nativeSymbol, sham: !descriptors }, {
          // `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 }, {
          // `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
        });
 
        });
 
        // `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 symbol = $Symbol();
          });
 
          _export({ target: 'JSON', stat: true, forced: FORCED_JSON_STRINGIFY }, {
-           // eslint-disable-next-line no-unused-vars
+           // 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 (!isObject$4(replacer) && it === undefined || isSymbol$1(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;
+               if (!isSymbol$1(value)) return value;
              };
              args[1] = replacer;
              return $stringify.apply(null, args);
        }
 
        // `Symbol.prototype[@@toPrimitive]` method
-       // https://tc39.github.io/ecma262/#sec-symbol.prototype-@@toprimitive
+       // https://tc39.es/ecma262/#sec-symbol.prototype-@@toprimitive
        if (!$Symbol[PROTOTYPE$1][TO_PRIMITIVE]) {
          createNonEnumerableProperty($Symbol[PROTOTYPE$1], TO_PRIMITIVE, $Symbol[PROTOTYPE$1].valueOf);
        }
        // `Symbol.prototype[@@toStringTag]` property
-       // https://tc39.github.io/ecma262/#sec-symbol.prototype-@@tostringtag
+       // https://tc39.es/ecma262/#sec-symbol.prototype-@@tostringtag
        setToStringTag($Symbol, SYMBOL);
 
-       hiddenKeys[HIDDEN] = true;
+       hiddenKeys$1[HIDDEN] = true;
 
-       var defineProperty$2 = objectDefineProperty.f;
+       var defineProperty$7 = objectDefineProperty.f;
 
 
-       var NativeSymbol = global_1.Symbol;
+       var NativeSymbol = global$2.Symbol;
 
        if (descriptors && typeof NativeSymbol == 'function' && (!('description' in NativeSymbol.prototype) ||
          // Safari 12 bug
          var symbolToString = symbolPrototype.toString;
          var native = String(NativeSymbol('test')) == 'Symbol(test)';
          var regexp = /^Symbol\((.*)\)[^)]+$/;
-         defineProperty$2(symbolPrototype, 'description', {
+         defineProperty$7(symbolPrototype, 'description', {
            configurable: true,
            get: function description() {
-             var symbol = isObject(this) ? this.valueOf() : this;
+             var symbol = isObject$4(this) ? this.valueOf() : this;
              var string = symbolToString.call(symbol);
-             if (has(EmptyStringDescriptionStore, symbol)) return '';
+             if (has$1(EmptyStringDescriptionStore, symbol)) return '';
              var desc = native ? string.slice(7, -1) : string.replace(regexp, '$1');
              return desc === '' ? undefined : desc;
            }
          });
        }
 
-       // `Symbol.iterator` well-known symbol
-       // https://tc39.github.io/ecma262/#sec-symbol.iterator
-       defineWellKnownSymbol('iterator');
+       // eslint-disable-next-line es/no-typed-arrays -- safe
+       var arrayBufferNative = typeof ArrayBuffer !== 'undefined' && typeof DataView !== 'undefined';
 
-       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 redefineAll = function (target, src, options) {
+         for (var key in src) redefine(target, key, src[key], options);
+         return target;
        };
 
-       var defineProperty$3 = Object.defineProperty;
-       var cache = {};
-
-       var thrower = function (it) { throw it; };
+       var anInstance = function (it, Constructor, name) {
+         if (!(it instanceof Constructor)) {
+           throw TypeError('Incorrect ' + (name ? name + ' ' : '') + 'invocation');
+         } return it;
+       };
 
-       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;
+       // `ToIndex` abstract operation
+       // https://tc39.es/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;
+       };
 
-         return cache[METHOD_NAME] = !!method && !fails(function () {
-           if (ACCESSORS && !descriptors) return true;
-           var O = { length: -1 };
+       // IEEE754 conversions based on https://github.com/feross/ieee754
+       var abs$4 = Math.abs;
+       var pow$2 = Math.pow;
+       var floor$6 = Math.floor;
+       var log$2 = Math.log;
+       var LN2 = Math.LN2;
 
-           if (ACCESSORS) defineProperty$3(O, 1, { enumerable: true, get: thrower });
-           else O[1] = 1;
+       var pack = function (number, mantissaLength, bytes) {
+         var buffer = new Array(bytes);
+         var exponentLength = bytes * 8 - mantissaLength - 1;
+         var eMax = (1 << exponentLength) - 1;
+         var eBias = eMax >> 1;
+         var rt = mantissaLength === 23 ? pow$2(2, -24) - pow$2(2, -77) : 0;
+         var sign = number < 0 || number === 0 && 1 / number < 0 ? 1 : 0;
+         var index = 0;
+         var exponent, mantissa, c;
+         number = abs$4(number);
+         // eslint-disable-next-line no-self-compare -- NaN check
+         if (number != number || number === Infinity) {
+           // eslint-disable-next-line no-self-compare -- NaN check
+           mantissa = number != number ? 1 : 0;
+           exponent = eMax;
+         } else {
+           exponent = floor$6(log$2(number) / LN2);
+           if (number * (c = pow$2(2, -exponent)) < 1) {
+             exponent--;
+             c *= 2;
+           }
+           if (exponent + eBias >= 1) {
+             number += rt / c;
+           } else {
+             number += rt * pow$2(2, 1 - eBias);
+           }
+           if (number * c >= 2) {
+             exponent++;
+             c /= 2;
+           }
+           if (exponent + eBias >= eMax) {
+             mantissa = 0;
+             exponent = eMax;
+           } else if (exponent + eBias >= 1) {
+             mantissa = (number * c - 1) * pow$2(2, mantissaLength);
+             exponent = exponent + eBias;
+           } else {
+             mantissa = number * pow$2(2, eBias - 1) * pow$2(2, mantissaLength);
+             exponent = 0;
+           }
+         }
+         for (; mantissaLength >= 8; buffer[index++] = mantissa & 255, mantissa /= 256, mantissaLength -= 8);
+         exponent = exponent << mantissaLength | mantissa;
+         exponentLength += mantissaLength;
+         for (; exponentLength > 0; buffer[index++] = exponent & 255, exponent /= 256, exponentLength -= 8);
+         buffer[--index] |= sign * 128;
+         return buffer;
+       };
 
-           method.call(O, argument0, argument1);
-         });
+       var unpack = function (buffer, mantissaLength) {
+         var bytes = buffer.length;
+         var exponentLength = bytes * 8 - mantissaLength - 1;
+         var eMax = (1 << exponentLength) - 1;
+         var eBias = eMax >> 1;
+         var nBits = exponentLength - 7;
+         var index = bytes - 1;
+         var sign = buffer[index--];
+         var exponent = sign & 127;
+         var mantissa;
+         sign >>= 7;
+         for (; nBits > 0; exponent = exponent * 256 + buffer[index], index--, nBits -= 8);
+         mantissa = exponent & (1 << -nBits) - 1;
+         exponent >>= -nBits;
+         nBits += mantissaLength;
+         for (; nBits > 0; mantissa = mantissa * 256 + buffer[index], index--, nBits -= 8);
+         if (exponent === 0) {
+           exponent = 1 - eBias;
+         } else if (exponent === eMax) {
+           return mantissa ? NaN : sign ? -Infinity : Infinity;
+         } else {
+           mantissa = mantissa + pow$2(2, mantissaLength);
+           exponent = exponent - eBias;
+         } return (sign ? -1 : 1) * mantissa * pow$2(2, exponent - mantissaLength);
        };
 
-       var $forEach$1 = arrayIteration.forEach;
-
-
-
-       var STRICT_METHOD = arrayMethodIsStrict('forEach');
-       var USES_TO_LENGTH = arrayMethodUsesToLength('forEach');
-
-       // `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;
-
-       // `Array.prototype.forEach` method
-       // https://tc39.github.io/ecma262/#sec-array.prototype.foreach
-       _export({ target: 'Array', proto: true, forced: [].forEach != arrayForEach }, {
-         forEach: arrayForEach
-       });
-
-       var $indexOf = arrayIncludes.indexOf;
-
-
-
-       var nativeIndexOf = [].indexOf;
-
-       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 });
-
-       // `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);
-         }
-       });
-
-       // `Array.isArray` method
-       // https://tc39.github.io/ecma262/#sec-array.isarray
-       _export({ target: 'Array', stat: true }, {
-         isArray: isArray
-       });
-
-       var UNSCOPABLES = wellKnownSymbol('unscopables');
-       var ArrayPrototype = Array.prototype;
-
-       // 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)
-         });
-       }
-
-       // add a key to Array.prototype[@@unscopables]
-       var addToUnscopables = function (key) {
-         ArrayPrototype[UNSCOPABLES][key] = true;
-       };
-
-       var iterators = {};
-
-       var correctPrototypeGetter = !fails(function () {
-         function F() { /* empty */ }
-         F.prototype.constructor = null;
-         return Object.getPrototypeOf(new F()) !== F.prototype;
-       });
-
-       var IE_PROTO$1 = sharedKey('IE_PROTO');
-       var ObjectPrototype$1 = Object.prototype;
-
-       // `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 ITERATOR = wellKnownSymbol('iterator');
-       var BUGGY_SAFARI_ITERATORS = false;
-
-       var returnThis = function () { return this; };
-
-       // `%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
-       };
+       var ieee754$1 = {
+         pack: pack,
+         unpack: unpack
+       };
 
        // `Array.prototype.fill` method implementation
-       // https://tc39.github.io/ecma262/#sec-array.prototype.fill
+       // https://tc39.es/ecma262/#sec-array.prototype.fill
        var arrayFill = function fill(value /* , start = 0, end = @length */) {
          var O = toObject(this);
          var length = toLength(O.length);
          return O;
        };
 
-       var getOwnPropertyNames = objectGetOwnPropertyNames.f;
-       var defineProperty$4 = objectDefineProperty.f;
+       var getOwnPropertyNames$3 = objectGetOwnPropertyNames.f;
+       var defineProperty$6 = objectDefineProperty.f;
 
 
 
 
        var getInternalState$2 = internalState.get;
-       var setInternalState$2 = internalState.set;
-       var ARRAY_BUFFER = 'ArrayBuffer';
+       var setInternalState$4 = internalState.set;
+       var ARRAY_BUFFER$1 = 'ArrayBuffer';
        var DATA_VIEW = 'DataView';
-       var PROTOTYPE$2 = 'prototype';
+       var PROTOTYPE = '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 NativeArrayBuffer$1 = global$2[ARRAY_BUFFER$1];
+       var $ArrayBuffer = NativeArrayBuffer$1;
+       var $DataView = global$2[DATA_VIEW];
+       var $DataViewPrototype = $DataView && $DataView[PROTOTYPE];
+       var ObjectPrototype$1 = Object.prototype;
+       var RangeError$1 = global$2.RangeError;
 
-       var packIEEE754 = ieee754.pack;
-       var unpackIEEE754 = ieee754.unpack;
+       var packIEEE754 = ieee754$1.pack;
+       var unpackIEEE754 = ieee754$1.unpack;
 
        var packInt8 = function (number) {
          return [number & 0xFF];
        };
 
        var addGetter = function (Constructor, key) {
-         defineProperty$4(Constructor[PROTOTYPE$2], key, { get: function () { return getInternalState$2(this)[key]; } });
+         defineProperty$6(Constructor[PROTOTYPE], key, { get: function () { return getInternalState$2(this)[key]; } });
        };
 
-       var get$1 = function (view, count, index, isLittleEndian) {
+       var get$4 = function (view, count, index, isLittleEndian) {
          var intIndex = toIndex(index);
          var store = getInternalState$2(view);
          if (intIndex + count > store.byteLength) throw RangeError$1(WRONG_INDEX);
          return isLittleEndian ? pack : pack.reverse();
        };
 
-       var set$1 = function (view, count, index, conversion, value, isLittleEndian) {
+       var set$3 = 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);
 
        if (!arrayBufferNative) {
          $ArrayBuffer = function ArrayBuffer(length) {
-           anInstance(this, $ArrayBuffer, ARRAY_BUFFER);
+           anInstance(this, $ArrayBuffer, ARRAY_BUFFER$1);
            var byteLength = toIndex(length);
-           setInternalState$2(this, {
+           setInternalState$4(this, {
              bytes: arrayFill.call(new Array(byteLength), 0),
              byteLength: byteLength
            });
            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, {
+           setInternalState$4(this, {
              buffer: buffer,
              byteLength: byteLength,
              byteOffset: offset
            addGetter($DataView, 'byteOffset');
          }
 
-         redefineAll($DataView[PROTOTYPE$2], {
+         redefineAll($DataView[PROTOTYPE], {
            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 {
+         /* eslint-disable no-new -- required for testing */
          if (!fails(function () {
-           NativeArrayBuffer(1);
+           NativeArrayBuffer$1(1);
          }) || !fails(function () {
-           new NativeArrayBuffer(-1); // eslint-disable-line no-new
+           new NativeArrayBuffer$1(-1);
          }) || 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;
+           new NativeArrayBuffer$1();
+           new NativeArrayBuffer$1(1.5);
+           new NativeArrayBuffer$1(NaN);
+           return NativeArrayBuffer$1.name != ARRAY_BUFFER$1;
          })) {
+         /* eslint-enable no-new -- required for testing */
            $ArrayBuffer = function ArrayBuffer(length) {
              anInstance(this, $ArrayBuffer);
-             return new NativeArrayBuffer(toIndex(length));
+             return new NativeArrayBuffer$1(toIndex(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]);
+           var ArrayBufferPrototype = $ArrayBuffer[PROTOTYPE] = NativeArrayBuffer$1[PROTOTYPE];
+           for (var keys$2 = getOwnPropertyNames$3(NativeArrayBuffer$1), j$2 = 0, key$1; keys$2.length > j$2;) {
+             if (!((key$1 = keys$2[j$2++]) in $ArrayBuffer)) {
+               createNonEnumerableProperty($ArrayBuffer, key$1, NativeArrayBuffer$1[key$1]);
              }
            }
            ArrayBufferPrototype.constructor = $ArrayBuffer;
          }
 
          // WebKit bug - the same parent prototype for typed arrays and data view
-         if (objectSetPrototypeOf && objectGetPrototypeOf($DataViewPrototype) !== ObjectPrototype$2) {
-           objectSetPrototypeOf($DataViewPrototype, ObjectPrototype$2);
+         if (objectSetPrototypeOf && objectGetPrototypeOf($DataViewPrototype) !== ObjectPrototype$1) {
+           objectSetPrototypeOf($DataViewPrototype, ObjectPrototype$1);
          }
 
          // iOS Safari 7.x bug
          var testView = new $DataView(new $ArrayBuffer(2));
-         var nativeSetInt8 = $DataViewPrototype.setInt8;
+         var $setInt8 = $DataViewPrototype.setInt8;
          testView.setInt8(0, 2147483648);
          testView.setInt8(1, 2147483649);
          if (testView.getInt8(0) || !testView.getInt8(1)) redefineAll($DataViewPrototype, {
            setInt8: function setInt8(byteOffset, value) {
-             nativeSetInt8.call(this, byteOffset, value << 24 >> 24);
+             $setInt8.call(this, byteOffset, value << 24 >> 24);
            },
            setUint8: function setUint8(byteOffset, value) {
-             nativeSetInt8.call(this, byteOffset, value << 24 >> 24);
+             $setInt8.call(this, byteOffset, value << 24 >> 24);
            }
          }, { unsafe: true });
        }
 
-       setToStringTag($ArrayBuffer, ARRAY_BUFFER);
+       setToStringTag($ArrayBuffer, ARRAY_BUFFER$1);
        setToStringTag($DataView, DATA_VIEW);
 
        var arrayBuffer = {
          DataView: $DataView
        };
 
-       var SPECIES$3 = wellKnownSymbol('species');
-
-       var setSpecies = function (CONSTRUCTOR_NAME) {
-         var Constructor = getBuiltIn(CONSTRUCTOR_NAME);
-         var defineProperty = objectDefineProperty.f;
+       var SPECIES$5 = wellKnownSymbol('species');
 
-         if (descriptors && Constructor && !Constructor[SPECIES$3]) {
-           defineProperty(Constructor, SPECIES$3, {
-             configurable: true,
-             get: function () { return this; }
-           });
-         }
+       // `SpeciesConstructor` abstract operation
+       // https://tc39.es/ecma262/#sec-speciesconstructor
+       var speciesConstructor = function (O, defaultConstructor) {
+         var C = anObject(O).constructor;
+         var S;
+         return C === undefined || (S = anObject(C)[SPECIES$5]) == undefined ? defaultConstructor : aFunction(S);
        };
 
-       var ARRAY_BUFFER$1 = 'ArrayBuffer';
-       var ArrayBuffer$1 = arrayBuffer[ARRAY_BUFFER$1];
-       var NativeArrayBuffer$1 = global_1[ARRAY_BUFFER$1];
+       var ArrayBuffer$3 = arrayBuffer.ArrayBuffer;
+       var DataView$1 = arrayBuffer.DataView;
+       var nativeArrayBufferSlice = ArrayBuffer$3.prototype.slice;
 
-       // `ArrayBuffer` constructor
-       // https://tc39.github.io/ecma262/#sec-arraybuffer-constructor
-       _export({ global: true, forced: NativeArrayBuffer$1 !== ArrayBuffer$1 }, {
-         ArrayBuffer: ArrayBuffer$1
+       var INCORRECT_SLICE = fails(function () {
+         return !new ArrayBuffer$3(2).slice(1, undefined).byteLength;
        });
 
-       setSpecies(ARRAY_BUFFER$1);
-
-       var TO_STRING_TAG$1 = wellKnownSymbol('toStringTag');
-       var test = {};
-
-       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 */ }
-       };
+       // `ArrayBuffer.prototype.slice` method
+       // https://tc39.es/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$3))(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;
+         }
+       });
 
-       // 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;
-       };
+       // `DataView` constructor
+       // https://tc39.es/ecma262/#sec-dataview-constructor
+       _export({ global: true, forced: !arrayBufferNative }, {
+         DataView: arrayBuffer.DataView
+       });
 
        var defineProperty$5 = objectDefineProperty.f;
 
 
 
 
-       var Int8Array$1 = global_1.Int8Array;
-       var Int8ArrayPrototype = Int8Array$1 && Int8Array$1.prototype;
-       var Uint8ClampedArray = global_1.Uint8ClampedArray;
+       var Int8Array$3 = global$2.Int8Array;
+       var Int8ArrayPrototype = Int8Array$3 && Int8Array$3.prototype;
+       var Uint8ClampedArray = global$2.Uint8ClampedArray;
        var Uint8ClampedArrayPrototype = Uint8ClampedArray && Uint8ClampedArray.prototype;
-       var TypedArray = Int8Array$1 && objectGetPrototypeOf(Int8Array$1);
+       var TypedArray = Int8Array$3 && objectGetPrototypeOf(Int8Array$3);
        var TypedArrayPrototype = Int8ArrayPrototype && objectGetPrototypeOf(Int8ArrayPrototype);
-       var ObjectPrototype$3 = Object.prototype;
-       var isPrototypeOf = ObjectPrototype$3.isPrototypeOf;
+       var ObjectPrototype = Object.prototype;
+       var isPrototypeOf = ObjectPrototype.isPrototypeOf;
 
-       var TO_STRING_TAG$3 = wellKnownSymbol('toStringTag');
+       var TO_STRING_TAG = wellKnownSymbol('toStringTag');
        var TYPED_ARRAY_TAG = uid('TYPED_ARRAY_TAG');
        // 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 NATIVE_ARRAY_BUFFER_VIEWS$2 = arrayBufferNative && !!objectSetPrototypeOf && classof(global$2.opera) !== 'Opera';
        var TYPED_ARRAY_TAG_REQIRED = false;
-       var NAME;
+       var NAME$1;
 
        var TypedArrayConstructorsList = {
          Int8Array: 1,
          Float64Array: 8
        };
 
+       var BigIntArrayConstructorsList = {
+         BigInt64Array: 8,
+         BigUint64Array: 8
+       };
+
        var isView = function isView(it) {
+         if (!isObject$4(it)) return false;
          var klass = classof(it);
-         return klass === 'DataView' || has(TypedArrayConstructorsList, klass);
+         return klass === 'DataView'
+           || has$1(TypedArrayConstructorsList, klass)
+           || has$1(BigIntArrayConstructorsList, klass);
        };
 
        var isTypedArray = function (it) {
-         return isObject(it) && has(TypedArrayConstructorsList, classof(it));
+         if (!isObject$4(it)) return false;
+         var klass = classof(it);
+         return has$1(TypedArrayConstructorsList, klass)
+           || has$1(BigIntArrayConstructorsList, klass);
        };
 
-       var aTypedArray = function (it) {
+       var aTypedArray$m = function (it) {
          if (isTypedArray(it)) return it;
          throw TypeError('Target is not a typed array');
        };
 
-       var aTypedArrayConstructor = function (C) {
+       var aTypedArrayConstructor$4 = 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];
+         } else for (var ARRAY in TypedArrayConstructorsList) if (has$1(TypedArrayConstructorsList, NAME$1)) {
+           var TypedArrayConstructor = global$2[ARRAY];
            if (TypedArrayConstructor && (C === TypedArrayConstructor || isPrototypeOf.call(TypedArrayConstructor, C))) {
              return C;
            }
          } throw TypeError('Target is not a typed array constructor');
        };
 
-       var exportTypedArrayMethod = function (KEY, property, forced) {
+       var exportTypedArrayMethod$n = function (KEY, property, forced) {
          if (!descriptors) return;
          if (forced) for (var ARRAY in TypedArrayConstructorsList) {
-           var TypedArrayConstructor = global_1[ARRAY];
-           if (TypedArrayConstructor && has(TypedArrayConstructor.prototype, KEY)) {
+           var TypedArrayConstructor = global$2[ARRAY];
+           if (TypedArrayConstructor && has$1(TypedArrayConstructor.prototype, KEY)) try {
              delete TypedArrayConstructor.prototype[KEY];
-           }
+           } catch (error) { /* empty */ }
          }
          if (!TypedArrayPrototype[KEY] || forced) {
            redefine(TypedArrayPrototype, KEY, forced ? property
-             : NATIVE_ARRAY_BUFFER_VIEWS && Int8ArrayPrototype[KEY] || property);
+             : NATIVE_ARRAY_BUFFER_VIEWS$2 && Int8ArrayPrototype[KEY] || property);
          }
        };
 
-       var exportTypedArrayStaticMethod = function (KEY, property, forced) {
+       var exportTypedArrayStaticMethod$1 = function (KEY, property, forced) {
          var ARRAY, TypedArrayConstructor;
          if (!descriptors) return;
          if (objectSetPrototypeOf) {
            if (forced) for (ARRAY in TypedArrayConstructorsList) {
-             TypedArrayConstructor = global_1[ARRAY];
-             if (TypedArrayConstructor && has(TypedArrayConstructor, KEY)) {
+             TypedArrayConstructor = global$2[ARRAY];
+             if (TypedArrayConstructor && has$1(TypedArrayConstructor, KEY)) try {
                delete TypedArrayConstructor[KEY];
-             }
+             } catch (error) { /* empty */ }
            }
            if (!TypedArray[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(TypedArray, KEY, forced ? property : NATIVE_ARRAY_BUFFER_VIEWS$2 && TypedArray[KEY] || property);
              } catch (error) { /* empty */ }
            } else return;
          }
          for (ARRAY in TypedArrayConstructorsList) {
-           TypedArrayConstructor = global_1[ARRAY];
+           TypedArrayConstructor = global$2[ARRAY];
            if (TypedArrayConstructor && (!TypedArrayConstructor[KEY] || forced)) {
              redefine(TypedArrayConstructor, KEY, property);
            }
          }
        };
 
-       for (NAME in TypedArrayConstructorsList) {
-         if (!global_1[NAME]) NATIVE_ARRAY_BUFFER_VIEWS = false;
+       for (NAME$1 in TypedArrayConstructorsList) {
+         if (!global$2[NAME$1]) NATIVE_ARRAY_BUFFER_VIEWS$2 = false;
        }
 
        // 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
+       if (!NATIVE_ARRAY_BUFFER_VIEWS$2 || typeof TypedArray != 'function' || TypedArray === Function.prototype) {
+         // eslint-disable-next-line no-shadow -- safe
          TypedArray = function TypedArray() {
            throw TypeError('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$2) for (NAME$1 in TypedArrayConstructorsList) {
+           if (global$2[NAME$1]) objectSetPrototypeOf(global$2[NAME$1], TypedArray);
          }
        }
 
-       if (!NATIVE_ARRAY_BUFFER_VIEWS || !TypedArrayPrototype || TypedArrayPrototype === ObjectPrototype$3) {
+       if (!NATIVE_ARRAY_BUFFER_VIEWS$2 || !TypedArrayPrototype || TypedArrayPrototype === ObjectPrototype) {
          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$2) for (NAME$1 in TypedArrayConstructorsList) {
+           if (global$2[NAME$1]) objectSetPrototypeOf(global$2[NAME$1].prototype, TypedArrayPrototype);
          }
        }
 
        // WebKit bug - one more object in Uint8ClampedArray prototype chain
-       if (NATIVE_ARRAY_BUFFER_VIEWS && objectGetPrototypeOf(Uint8ClampedArrayPrototype) !== TypedArrayPrototype) {
+       if (NATIVE_ARRAY_BUFFER_VIEWS$2 && objectGetPrototypeOf(Uint8ClampedArrayPrototype) !== TypedArrayPrototype) {
          objectSetPrototypeOf(Uint8ClampedArrayPrototype, TypedArrayPrototype);
        }
 
-       if (descriptors && !has(TypedArrayPrototype, TO_STRING_TAG$3)) {
+       if (descriptors && !has$1(TypedArrayPrototype, TO_STRING_TAG)) {
          TYPED_ARRAY_TAG_REQIRED = true;
-         defineProperty$5(TypedArrayPrototype, TO_STRING_TAG$3, { get: function () {
-           return isObject(this) ? this[TYPED_ARRAY_TAG] : undefined;
+         defineProperty$5(TypedArrayPrototype, TO_STRING_TAG, { get: function () {
+           return isObject$4(this) ? this[TYPED_ARRAY_TAG] : undefined;
          } });
-         for (NAME in TypedArrayConstructorsList) if (global_1[NAME]) {
-           createNonEnumerableProperty(global_1[NAME], TYPED_ARRAY_TAG, NAME);
+         for (NAME$1 in TypedArrayConstructorsList) if (global$2[NAME$1]) {
+           createNonEnumerableProperty(global$2[NAME$1], TYPED_ARRAY_TAG, NAME$1);
          }
        }
 
        var arrayBufferViewCore = {
-         NATIVE_ARRAY_BUFFER_VIEWS: NATIVE_ARRAY_BUFFER_VIEWS,
+         NATIVE_ARRAY_BUFFER_VIEWS: NATIVE_ARRAY_BUFFER_VIEWS$2,
          TYPED_ARRAY_TAG: TYPED_ARRAY_TAG_REQIRED && TYPED_ARRAY_TAG,
-         aTypedArray: aTypedArray,
-         aTypedArrayConstructor: aTypedArrayConstructor,
-         exportTypedArrayMethod: exportTypedArrayMethod,
-         exportTypedArrayStaticMethod: exportTypedArrayStaticMethod,
+         aTypedArray: aTypedArray$m,
+         aTypedArrayConstructor: aTypedArrayConstructor$4,
+         exportTypedArrayMethod: exportTypedArrayMethod$n,
+         exportTypedArrayStaticMethod: exportTypedArrayStaticMethod$1,
          isView: isView,
          isTypedArray: isTypedArray,
          TypedArray: TypedArray,
        var NATIVE_ARRAY_BUFFER_VIEWS$1 = arrayBufferViewCore.NATIVE_ARRAY_BUFFER_VIEWS;
 
        // `ArrayBuffer.isView` method
-       // https://tc39.github.io/ecma262/#sec-arraybuffer.isview
+       // https://tc39.es/ecma262/#sec-arraybuffer.isview
        _export({ target: 'ArrayBuffer', stat: true, forced: !NATIVE_ARRAY_BUFFER_VIEWS$1 }, {
          isView: arrayBufferViewCore.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 setSpecies = function (CONSTRUCTOR_NAME) {
+         var Constructor = getBuiltIn(CONSTRUCTOR_NAME);
+         var defineProperty = objectDefineProperty.f;
+
+         if (descriptors && Constructor && !Constructor[SPECIES$4]) {
+           defineProperty(Constructor, SPECIES$4, {
+             configurable: true,
+             get: function () { return this; }
+           });
+         }
        };
 
-       var ArrayBuffer$2 = arrayBuffer.ArrayBuffer;
-       var DataView$1 = arrayBuffer.DataView;
-       var nativeArrayBufferSlice = ArrayBuffer$2.prototype.slice;
+       var ARRAY_BUFFER = 'ArrayBuffer';
+       var ArrayBuffer$2 = arrayBuffer[ARRAY_BUFFER];
+       var NativeArrayBuffer = global$2[ARRAY_BUFFER];
 
-       var INCORRECT_SLICE = fails(function () {
-         return !new ArrayBuffer$2(2).slice(1, undefined).byteLength;
+       // `ArrayBuffer` constructor
+       // https://tc39.es/ecma262/#sec-arraybuffer-constructor
+       _export({ global: true, forced: NativeArrayBuffer !== ArrayBuffer$2 }, {
+         ArrayBuffer: ArrayBuffer$2
        });
 
-       // `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;
+       setSpecies(ARRAY_BUFFER);
+
+       var arrayMethodIsStrict = function (METHOD_NAME, argument) {
+         var method = [][METHOD_NAME];
+         return !!method && fails(function () {
+           // eslint-disable-next-line no-useless-call,no-throw-literal -- required for testing
+           method.call(null, argument || function () { throw 1; }, 1);
+         });
+       };
+
+       /* eslint-disable es/no-array-prototype-indexof -- required for testing */
+
+       var $indexOf$1 = arrayIncludes.indexOf;
+
+
+       var nativeIndexOf = [].indexOf;
+
+       var NEGATIVE_ZERO$1 = !!nativeIndexOf && 1 / [1].indexOf(1, -0) < 0;
+       var STRICT_METHOD$7 = arrayMethodIsStrict('indexOf');
+
+       // `Array.prototype.indexOf` method
+       // https://tc39.es/ecma262/#sec-array.prototype.indexof
+       _export({ target: 'Array', proto: true, forced: NEGATIVE_ZERO$1 || !STRICT_METHOD$7 }, {
+         indexOf: function indexOf(searchElement /* , fromIndex = 0 */) {
+           return NEGATIVE_ZERO$1
+             // convert -0 to +0
+             ? nativeIndexOf.apply(this, arguments) || 0
+             : $indexOf$1(this, searchElement, arguments.length > 1 ? arguments[1] : undefined);
          }
        });
 
-       // `DataView` constructor
-       // https://tc39.github.io/ecma262/#sec-dataview-constructor
-       _export({ global: true, forced: !arrayBufferNative }, {
-         DataView: arrayBuffer.DataView
+       var SPECIES$3 = 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$3] = function () {
+             return { foo: 1 };
+           };
+           return array[METHOD_NAME](Boolean).foo !== 1;
+         });
+       };
+
+       var $map$1 = arrayIteration.map;
+
+
+       var HAS_SPECIES_SUPPORT$3 = arrayMethodHasSpeciesSupport('map');
+
+       // `Array.prototype.map` method
+       // https://tc39.es/ecma262/#sec-array.prototype.map
+       // with adding support of @@species
+       _export({ 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 defineProperty$6 = objectDefineProperty.f;
+       var $forEach$1 = arrayIteration.forEach;
 
-       var FunctionPrototype = Function.prototype;
-       var FunctionPrototypeToString = FunctionPrototype.toString;
-       var nameRE = /^\s*function ([^ (]*)/;
-       var NAME$1 = 'name';
 
-       // 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 STRICT_METHOD$6 = arrayMethodIsStrict('forEach');
+
+       // `Array.prototype.forEach` method implementation
+       // https://tc39.es/ecma262/#sec-array.prototype.foreach
+       var arrayForEach = !STRICT_METHOD$6 ? function forEach(callbackfn /* , thisArg */) {
+         return $forEach$1(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+       // eslint-disable-next-line es/no-array-prototype-foreach -- safe
+       } : [].forEach;
+
+       // `Array.prototype.forEach` method
+       // https://tc39.es/ecma262/#sec-array.prototype.foreach
+       // eslint-disable-next-line es/no-array-prototype-foreach -- safe
+       _export({ target: 'Array', proto: true, forced: [].forEach != arrayForEach }, {
+         forEach: arrayForEach
+       });
+
+       for (var COLLECTION_NAME in domIterables) {
+         var Collection = global$2[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;
+         }
        }
 
-       // `Object.create` method
-       // https://tc39.github.io/ecma262/#sec-object.create
-       _export({ target: 'Object', stat: true, sham: !descriptors }, {
-         create: objectCreate
+       // `Array.isArray` method
+       // https://tc39.es/ecma262/#sec-array.isarray
+       _export({ target: 'Array', stat: true }, {
+         isArray: isArray
        });
 
-       var nativeGetOwnPropertyNames$2 = objectGetOwnPropertyNamesExternal.f;
+       var getOwnPropertyNames$2 = objectGetOwnPropertyNamesExternal.f;
 
-       var FAILS_ON_PRIMITIVES = fails(function () { return !Object.getOwnPropertyNames(1); });
+       // eslint-disable-next-line es/no-object-getownpropertynames -- required for testing
+       var FAILS_ON_PRIMITIVES$4 = fails(function () { return !Object.getOwnPropertyNames(1); });
 
        // `Object.getOwnPropertyNames` method
-       // https://tc39.github.io/ecma262/#sec-object.getownpropertynames
-       _export({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES }, {
-         getOwnPropertyNames: nativeGetOwnPropertyNames$2
+       // https://tc39.es/ecma262/#sec-object.getownpropertynames
+       _export({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES$4 }, {
+         getOwnPropertyNames: getOwnPropertyNames$2
        });
 
-       // `Object.prototype.toString` method implementation
-       // https://tc39.github.io/ecma262/#sec-object.prototype.tostring
-       var objectToString = toStringTagSupport ? {}.toString : function toString() {
-         return '[object ' + classof(this) + ']';
-       };
-
-       // `Object.prototype.toString` method
-       // https://tc39.github.io/ecma262/#sec-object.prototype.tostring
-       if (!toStringTagSupport) {
-         redefine(Object.prototype, 'toString', objectToString, { unsafe: true });
-       }
-
-       var nativePromiseConstructor = global_1.Promise;
+       var nativePromiseConstructor = global$2.Promise;
 
-       var ITERATOR$2 = wellKnownSymbol('iterator');
-       var ArrayPrototype$1 = Array.prototype;
+       var ITERATOR$5 = wellKnownSymbol('iterator');
+       var ArrayPrototype = Array.prototype;
 
        // check on default Array iterator
        var isArrayIteratorMethod = function (it) {
-         return it !== undefined && (iterators.Array === it || ArrayPrototype$1[ITERATOR$2] === it);
+         return it !== undefined && (iterators.Array === it || ArrayPrototype[ITERATOR$5] === it);
        };
 
-       var ITERATOR$3 = wellKnownSymbol('iterator');
+       var ITERATOR$4 = wellKnownSymbol('iterator');
 
        var getIteratorMethod = function (it) {
-         if (it != undefined) return it[ITERATOR$3]
+         if (it != undefined) return it[ITERATOR$4]
            || it['@@iterator']
            || iterators[classof(it)];
        };
          } return new Result(false);
        };
 
-       var ITERATOR$4 = wellKnownSymbol('iterator');
+       var ITERATOR$3 = wellKnownSymbol('iterator');
        var SAFE_CLOSING = false;
 
        try {
              SAFE_CLOSING = true;
            }
          };
-         iteratorWithReturn[ITERATOR$4] = function () {
+         iteratorWithReturn[ITERATOR$3] = function () {
            return this;
          };
-         // eslint-disable-next-line no-throw-literal
+         // eslint-disable-next-line es/no-array-from, no-throw-literal -- required for testing
          Array.from(iteratorWithReturn, function () { throw 2; });
        } catch (error) { /* empty */ }
 
          var ITERATION_SUPPORT = false;
          try {
            var object = {};
-           object[ITERATOR$4] = function () {
+           object[ITERATOR$3] = function () {
              return {
                next: function () {
                  return { done: ITERATION_SUPPORT = true };
          return ITERATION_SUPPORT;
        };
 
-       var engineIsIos = /(iphone|ipod|ipad).*applewebkit/i.test(engineUserAgent);
+       var engineIsIos = /(?:iphone|ipod|ipad).*applewebkit/i.test(engineUserAgent);
 
-       var engineIsNode = classofRaw(global_1.process) == 'process';
+       var engineIsNode = classofRaw(global$2.process) == 'process';
 
-       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 location$1 = global$2.location;
+       var set$2 = global$2.setImmediate;
+       var clear = global$2.clearImmediate;
+       var process$3 = global$2.process;
+       var MessageChannel = global$2.MessageChannel;
+       var Dispatch$1 = global$2.Dispatch;
        var counter = 0;
        var queue = {};
        var ONREADYSTATECHANGE = 'onreadystatechange';
        var defer, channel, port;
 
        var run = function (id) {
-         // eslint-disable-next-line no-prototype-builtins
+         // eslint-disable-next-line no-prototype-builtins -- safe
          if (queue.hasOwnProperty(id)) {
            var fn = queue[id];
            delete queue[id];
 
        var post = function (id) {
          // old engines have not location.origin
-         global_1.postMessage(id + '', location$1.protocol + '//' + location$1.host);
+         global$2.postMessage(id + '', location$1.protocol + '//' + location$1.host);
        };
 
        // Node.js 0.9+ & IE10+ has setImmediate, otherwise:
            var i = 1;
            while (arguments.length > i) args.push(arguments[i++]);
            queue[++counter] = function () {
-             // eslint-disable-next-line no-new-func
+             // eslint-disable-next-line no-new-func -- spec requirement
              (typeof fn == 'function' ? fn : Function(fn)).apply(undefined, args);
            };
            defer(counter);
          // Node.js 0.8-
          if (engineIsNode) {
            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
          // Browsers with postMessage, skip WebWorkers
          // IE8 has postMessage, but it's sync & typeof its postMessage is 'object'
          } else if (
-           global_1.addEventListener &&
+           global$2.addEventListener &&
            typeof postMessage == 'function' &&
-           !global_1.importScripts &&
+           !global$2.importScripts &&
            location$1 && location$1.protocol !== 'file:' &&
            !fails(post)
          ) {
            defer = post;
-           global_1.addEventListener('message', listener, false);
+           global$2.addEventListener('message', listener, false);
          // IE8-
          } else if (ONREADYSTATECHANGE in documentCreateElement('script')) {
            defer = function (id) {
          }
        }
 
-       var task = {
+       var task$1 = {
          set: set$2,
          clear: clear
        };
 
-       var getOwnPropertyDescriptor$2 = objectGetOwnPropertyDescriptor.f;
-       var macrotask = task.set;
+       var engineIsWebosWebkit = /web0s(?!.*chrome)/i.test(engineUserAgent);
+
+       var getOwnPropertyDescriptor$3 = objectGetOwnPropertyDescriptor.f;
+       var macrotask = task$1.set;
 
 
 
-       var MutationObserver = global_1.MutationObserver || global_1.WebKitMutationObserver;
-       var document$2 = global_1.document;
-       var process$3 = global_1.process;
-       var Promise$1 = global_1.Promise;
+
+       var MutationObserver = global$2.MutationObserver || global$2.WebKitMutationObserver;
+       var document$2 = global$2.document;
+       var process$2 = global$2.process;
+       var Promise$1 = global$2.Promise;
        // Node.js 11 shows ExperimentalWarning on getting `queueMicrotask`
-       var queueMicrotaskDescriptor = getOwnPropertyDescriptor$2(global_1, 'queueMicrotask');
+       var queueMicrotaskDescriptor = getOwnPropertyDescriptor$3(global$2, '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 (engineIsNode && (parent = process$3.domain)) parent.exit();
+           if (engineIsNode && (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;
              }
          };
 
          // browsers with MutationObserver, except iOS - https://github.com/zloirock/core-js/issues/339
-         if (!engineIsIos && !engineIsNode && MutationObserver && document$2) {
+         // also except WebOS Webkit https://github.com/zloirock/core-js/issues/898
+         if (!engineIsIos && !engineIsNode && !engineIsWebosWebkit && MutationObserver && document$2) {
            toggle = true;
            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) {
            // Promise.resolve without an argument throws an error in LG WebOS 2
            promise = Promise$1.resolve(undefined);
+           // workaround of WebKit ~ iOS Safari 10.1 bug
+           promise.constructor = Promise$1;
            then = promise.then;
-           notify = function () {
+           notify$1 = function () {
              then.call(promise, flush);
            };
          // Node.js without promises
          } else if (engineIsNode) {
-           notify = function () {
-             process$3.nextTick(flush);
+           notify$1 = function () {
+             process$2.nextTick(flush);
            };
          // for other environments - macrotask based on:
          // - setImmediate
          // - onreadystatechange
          // - setTimeout
          } else {
-           notify = function () {
+           notify$1 = function () {
              // strange IE + webpack dev server bug - use .call(global)
-             macrotask.call(global_1, flush);
+             macrotask.call(global$2, flush);
            };
          }
        }
          if (last) last.next = task;
          if (!head) {
            head = task;
-           notify();
+           notify$1();
          } last = task;
        };
 
            resolve = $$resolve;
            reject = $$reject;
          });
-         this.resolve = aFunction$1(resolve);
-         this.reject = aFunction$1(reject);
+         this.resolve = aFunction(resolve);
+         this.reject = aFunction(reject);
        };
 
-       // 25.4.1.5 NewPromiseCapability(C)
-       var f$7 = function (C) {
+       // `NewPromiseCapability` abstract operation
+       // https://tc39.es/ecma262/#sec-newpromisecapability
+       var f = function (C) {
          return new PromiseCapability(C);
        };
 
-       var newPromiseCapability = {
-               f: f$7
+       var newPromiseCapability$1 = {
+               f: f
        };
 
        var promiseResolve = function (C, x) {
          anObject(C);
-         if (isObject(x) && x.constructor === C) return x;
-         var promiseCapability = newPromiseCapability.f(C);
+         if (isObject$4(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 console = global$2.console;
          if (console && console.error) {
            arguments.length === 1 ? console.error(a) : console.error(a, b);
          }
          }
        };
 
-       var task$1 = task.set;
+       var engineIsBrowser = typeof window == 'object';
 
+       var task = task$1.set;
 
 
 
 
 
 
-       var SPECIES$5 = wellKnownSymbol('species');
+
+
+       var SPECIES$2 = wellKnownSymbol('species');
        var PROMISE = 'Promise';
-       var getInternalState$3 = internalState.get;
+       var getInternalState$1 = internalState.get;
        var setInternalState$3 = internalState.set;
        var getInternalPromiseState = internalState.getterFor(PROMISE);
+       var NativePromisePrototype = nativePromiseConstructor && nativePromiseConstructor.prototype;
        var PromiseConstructor = nativePromiseConstructor;
-       var TypeError$1 = global_1.TypeError;
-       var document$3 = global_1.document;
-       var process$4 = global_1.process;
-       var $fetch = getBuiltIn('fetch');
-       var newPromiseCapability$1 = newPromiseCapability.f;
-       var newGenericPromiseCapability = newPromiseCapability$1;
-       var DISPATCH_EVENT = !!(document$3 && document$3.createEvent && global_1.dispatchEvent);
+       var PromiseConstructorPrototype = NativePromisePrototype;
+       var TypeError$1 = global$2.TypeError;
+       var document$1 = global$2.document;
+       var process$1 = global$2.process;
+       var newPromiseCapability = newPromiseCapability$1.f;
+       var newGenericPromiseCapability = newPromiseCapability;
+       var DISPATCH_EVENT = !!(document$1 && document$1.createEvent && global$2.dispatchEvent);
        var NATIVE_REJECTION_EVENT = typeof PromiseRejectionEvent == 'function';
        var UNHANDLED_REJECTION = 'unhandledrejection';
        var REJECTION_HANDLED = 'rejectionhandled';
        var REJECTED = 2;
        var HANDLED = 1;
        var UNHANDLED = 2;
+       var SUBCLASSING = false;
        var Internal, OwnPromiseCapability, PromiseWrapper, nativeThen;
 
-       var FORCED = isForced_1(PROMISE, function () {
+       var FORCED$f = 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 (!engineIsNode && !NATIVE_REJECTION_EVENT) return true;
-         }
+         // 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 && engineV8Version === 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;
          // 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 && engineIsBrowser && !NATIVE_REJECTION_EVENT;
        });
 
-       var INCORRECT_ITERATION = FORCED || !checkCorrectnessOfIteration(function (iterable) {
+       var INCORRECT_ITERATION$1 = FORCED$f || !checkCorrectnessOfIteration(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$4(it) && typeof (then = it.then) == 'function' ? then : false;
        };
 
-       var notify$1 = function (state, isReject) {
+       var notify = function (state, isReject) {
          if (state.notified) return;
          state.notified = true;
          var chain = state.reactions;
          });
        };
 
-       var dispatchEvent = function (name, promise, reason) {
+       var dispatchEvent$1 = function (name, promise, reason) {
          var event, handler;
          if (DISPATCH_EVENT) {
-           event = document$3.createEvent('Event');
+           event = document$1.createEvent('Event');
            event.promise = promise;
            event.reason = reason;
            event.initEvent(name, false, true);
-           global_1.dispatchEvent(event);
+           global$2.dispatchEvent(event);
          } else event = { promise: promise, reason: reason };
-         if (!NATIVE_REJECTION_EVENT && (handler = global_1['on' + name])) handler(event);
+         if (!NATIVE_REJECTION_EVENT && (handler = global$2['on' + name])) handler(event);
          else if (name === UNHANDLED_REJECTION) hostReportErrors('Unhandled promise rejection', reason);
        };
 
        var onUnhandled = function (state) {
-         task$1.call(global_1, function () {
+         task.call(global$2, function () {
            var promise = state.facade;
            var value = state.value;
            var IS_UNHANDLED = isUnhandled(state);
            if (IS_UNHANDLED) {
              result = perform(function () {
                if (engineIsNode) {
-                 process$4.emit('unhandledRejection', value, promise);
-               } else dispatchEvent(UNHANDLED_REJECTION, promise, value);
+                 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 = engineIsNode || isUnhandled(state) ? UNHANDLED : HANDLED;
        };
 
        var onHandleUnhandled = function (state) {
-         task$1.call(global_1, function () {
+         task.call(global$2, function () {
            var promise = state.facade;
            if (engineIsNode) {
-             process$4.emit('rejectionHandled', promise);
-           } else dispatchEvent(REJECTION_HANDLED, promise, state.value);
+             process$1.emit('rejectionHandled', promise);
+           } else dispatchEvent$1(REJECTION_HANDLED, promise, state.value);
          });
        };
 
-       var bind = function (fn, state, unwrap) {
+       var bind$2 = function (fn, state, unwrap) {
          return function (value) {
            fn(state, value, unwrap);
          };
          if (unwrap) state = unwrap;
          state.value = value;
          state.state = REJECTED;
-         notify$1(state, true);
+         notify(state, true);
        };
 
        var internalResolve = function (state, value, unwrap) {
                var wrapper = { done: false };
                try {
                  then.call(value,
-                   bind(internalResolve, wrapper, state),
-                   bind(internalReject, wrapper, state)
+                   bind$2(internalResolve, wrapper, state),
+                   bind$2(internalReject, wrapper, state)
                  );
                } catch (error) {
                  internalReject(wrapper, error, state);
            } else {
              state.value = value;
              state.state = FULFILLED;
-             notify$1(state, false);
+             notify(state, false);
            }
          } catch (error) {
            internalReject({ done: false }, error, state);
        };
 
        // constructor polyfill
-       if (FORCED) {
+       if (FORCED$f) {
          // 25.4.3.1 Promise(executor)
          PromiseConstructor = function Promise(executor) {
            anInstance(this, PromiseConstructor, PROMISE);
-           aFunction$1(executor);
+           aFunction(executor);
            Internal.call(this);
-           var state = getInternalState$3(this);
+           var state = getInternalState$1(this);
            try {
-             executor(bind(internalResolve, state), bind(internalReject, state));
+             executor(bind$2(internalResolve, state), bind$2(internalReject, state));
            } catch (error) {
              internalReject(state, error);
            }
          };
-         // eslint-disable-next-line no-unused-vars
+         PromiseConstructorPrototype = PromiseConstructor.prototype;
+         // eslint-disable-next-line no-unused-vars -- required for `.length`
          Internal = function Promise(executor) {
            setInternalState$3(this, {
              type: PROMISE,
              value: undefined
            });
          };
-         Internal.prototype = redefineAll(PromiseConstructor.prototype, {
+         Internal.prototype = redefineAll(PromiseConstructorPrototype, {
            // `Promise.prototype.then` method
-           // https://tc39.github.io/ecma262/#sec-promise.prototype.then
+           // https://tc39.es/ecma262/#sec-promise.prototype.then
            then: function then(onFulfilled, onRejected) {
              var state = getInternalPromiseState(this);
-             var reaction = newPromiseCapability$1(speciesConstructor(this, PromiseConstructor));
+             var reaction = newPromiseCapability(speciesConstructor(this, PromiseConstructor));
              reaction.ok = typeof onFulfilled == 'function' ? onFulfilled : true;
              reaction.fail = typeof onRejected == 'function' && onRejected;
-             reaction.domain = engineIsNode ? process$4.domain : undefined;
+             reaction.domain = engineIsNode ? process$1.domain : undefined;
              state.parent = true;
              state.reactions.push(reaction);
-             if (state.state != PENDING) notify$1(state, false);
+             if (state.state != PENDING) notify(state, false);
              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, state);
-           this.reject = bind(internalReject, state);
+           this.resolve = bind$2(internalResolve, state);
+           this.reject = bind$2(internalReject, state);
          };
-         newPromiseCapability.f = newPromiseCapability$1 = function (C) {
+         newPromiseCapability$1.f = newPromiseCapability = function (C) {
            return C === PromiseConstructor || C === PromiseWrapper
              ? new OwnPromiseCapability(C)
              : newGenericPromiseCapability(C);
          };
 
-         if ( typeof nativePromiseConstructor == 'function') {
-           nativeThen = nativePromiseConstructor.prototype.then;
+         if (typeof nativePromiseConstructor == 'function' && 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 });
+           if (!SUBCLASSING) {
+             // make `Promise#then` return a polyfilled `Promise` for native promise-based APIs
+             redefine(NativePromisePrototype, 'then', function then(onFulfilled, onRejected) {
+               var that = this;
+               return new PromiseConstructor(function (resolve, reject) {
+                 nativeThen.call(that, resolve, reject);
+               }).then(onFulfilled, onRejected);
+             // https://github.com/zloirock/core-js/issues/640
+             }, { unsafe: true });
 
-           // 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));
-             }
-           });
+             // makes sure that native promise-based APIs `Promise#catch` properly works with patched `Promise#then`
+             redefine(NativePromisePrototype, 'catch', PromiseConstructorPrototype['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 (objectSetPrototypeOf) {
+             objectSetPrototypeOf(NativePromisePrototype, PromiseConstructorPrototype);
+           }
          }
        }
 
-       _export({ global: true, wrap: true, forced: FORCED }, {
+       _export({ global: true, wrap: true, forced: FORCED$f }, {
          Promise: PromiseConstructor
        });
 
        PromiseWrapper = getBuiltIn(PROMISE);
 
        // statics
-       _export({ target: PROMISE, stat: true, forced: FORCED }, {
+       _export({ target: PROMISE, stat: true, forced: FORCED$f }, {
          // `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);
+           var capability = newPromiseCapability(this);
            capability.reject.call(undefined, r);
            return capability.promise;
          }
        });
 
-       _export({ target: PROMISE, stat: true, forced:  FORCED }, {
+       _export({ target: PROMISE, stat: true, forced: FORCED$f }, {
          // `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(this, x);
          }
        });
 
-       _export({ target: PROMISE, stat: true, forced: INCORRECT_ITERATION }, {
+       _export({ 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 = aFunction(C.resolve);
              var values = [];
              var counter = 0;
              var remaining = 1;
            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);
+             var $promiseResolve = aFunction(C.resolve);
              iterate(iterable, function (promise) {
                $promiseResolve.call(C, promise).then(capability.resolve, reject);
              });
          }
        });
 
-       // `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;
-       };
+       /* eslint-disable no-new -- required for testing */
 
-       // 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);
-       }
+       var NATIVE_ARRAY_BUFFER_VIEWS = arrayBufferViewCore.NATIVE_ARRAY_BUFFER_VIEWS;
 
-       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 ArrayBuffer$1 = global$2.ArrayBuffer;
+       var Int8Array$2 = global$2.Int8Array;
 
-       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 typedArrayConstructorsRequireWrappers = !NATIVE_ARRAY_BUFFER_VIEWS || !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$1(2), 1, undefined).length !== 1;
        });
 
-       var regexpStickyHelpers = {
-               UNSUPPORTED_Y: UNSUPPORTED_Y,
-               BROKEN_CARET: BROKEN_CARET
+       var toPositiveInteger = function (it) {
+         var result = toInteger(it);
+         if (result < 0) throw RangeError("The argument can't be less than 0");
+         return result;
        };
 
-       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 patchedExec = nativeExec;
-
-       var UPDATES_LAST_INDEX_WRONG = (function () {
-         var re1 = /a/;
-         var re2 = /b*/g;
-         nativeExec.call(re1, 'a');
-         nativeExec.call(re2, 'a');
-         return re1.lastIndex !== 0 || re2.lastIndex !== 0;
-       })();
-
-       var UNSUPPORTED_Y$1 = regexpStickyHelpers.UNSUPPORTED_Y || regexpStickyHelpers.BROKEN_CARET;
-
-       // nonparticipating capturing group, copied from es5-shim's String#split patch.
-       var NPCG_INCLUDED = /()??/.exec('')[1] !== undefined;
-
-       var PATCH = UPDATES_LAST_INDEX_WRONG || NPCG_INCLUDED || UNSUPPORTED_Y$1;
-
-       if (PATCH) {
-         patchedExec = function exec(str) {
-           var re = this;
-           var lastIndex, reCopy, match, i;
-           var sticky = UNSUPPORTED_Y$1 && re.sticky;
-           var flags = regexpFlags.call(re);
-           var source = re.source;
-           var charsAdded = 0;
-           var strCopy = str;
-
-           if (sticky) {
-             flags = flags.replace('y', '');
-             if (flags.indexOf('g') === -1) {
-               flags += 'g';
-             }
-
-             strCopy = String(str).slice(re.lastIndex);
-             // Support anchored sticky behavior.
-             if (re.lastIndex > 0 && (!re.multiline || re.multiline && str[re.lastIndex - 1] !== '\n')) {
-               source = '(?: ' + source + ')';
-               strCopy = ' ' + strCopy;
-               charsAdded++;
-             }
-             // ^(? + rx + ) is needed, in combination with some str slicing, to
-             // simulate the 'y' flag.
-             reCopy = new RegExp('^(?:' + source + ')', flags);
-           }
-
-           if (NPCG_INCLUDED) {
-             reCopy = new RegExp('^' + source + '$(?!\\s)', flags);
-           }
-           if (UPDATES_LAST_INDEX_WRONG) lastIndex = re.lastIndex;
+       var toOffset = function (it, BYTES) {
+         var offset = toPositiveInteger(it);
+         if (offset % BYTES) throw RangeError('Wrong offset');
+         return offset;
+       };
 
-           match = nativeExec.call(sticky ? reCopy : re, strCopy);
+       var aTypedArrayConstructor$3 = 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 = 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);
            }
+         }
+         if (mapping && argumentsLength > 2) {
+           mapfn = functionBindContext(mapfn, arguments[2], 2);
+         }
+         length = toLength(O.length);
+         result = new (aTypedArrayConstructor$3(this))(length);
+         for (i = 0; length > i; i++) {
+           result[i] = mapping ? mapfn(O[i], i) : O[i];
+         }
+         return result;
+       };
 
-           return match;
-         };
-       }
-
-       var regexpExec = patchedExec;
-
-       _export({ target: 'RegExp', proto: true, forced: /./.exec !== regexpExec }, {
-         exec: regexpExec
-       });
+       // 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$4(NewTargetPrototype = NewTarget.prototype) &&
+           NewTargetPrototype !== Wrapper.prototype
+         ) objectSetPrototypeOf($this, NewTargetPrototype);
+         return $this;
+       };
 
-       var TO_STRING$1 = 'toString';
-       var RegExpPrototype = RegExp.prototype;
-       var nativeToString = RegExpPrototype[TO_STRING$1];
+       var typedArrayConstructor = createCommonjsModule(function (module) {
 
-       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;
 
-       // `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 });
-       }
 
-       // `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 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 charAt = stringMultibyte.charAt;
 
 
 
-       var STRING_ITERATOR = 'String Iterator';
-       var setInternalState$4 = internalState.set;
-       var getInternalState$4 = internalState.getterFor(STRING_ITERATOR);
 
-       // `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 };
-       });
 
-       // TODO: Remove from `core-js@4` since it's moved to entry points
 
 
 
 
 
 
-       var SPECIES$6 = wellKnownSymbol('species');
 
-       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';
-       });
+       var getOwnPropertyNames = objectGetOwnPropertyNames.f;
 
-       // 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';
-       })();
+       var forEach = arrayIteration.forEach;
 
-       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;
-       })();
 
-       // 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';
-       });
 
-       var fixRegexpWellKnownSymbolLogic = function (KEY, length, exec, sham) {
-         var SYMBOL = wellKnownSymbol(KEY);
 
-         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 DELEGATES_TO_EXEC = DELEGATES_TO_SYMBOL && !fails(function () {
-           // Symbol-named RegExp methods call .exec
-           var execCalled = false;
-           var re = /a/;
 
-           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 getInternalState = internalState.get;
+       var setInternalState = internalState.set;
+       var nativeDefineProperty = objectDefineProperty.f;
+       var nativeGetOwnPropertyDescriptor = objectGetOwnPropertyDescriptor.f;
+       var round = Math.round;
+       var RangeError = global$2.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';
 
-           re.exec = function () { execCalled = true; return null; };
+       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;
+       };
 
-           re[SYMBOL]('');
-           return !execCalled;
-         });
+       var addGetter = function (it, key) {
+         nativeDefineProperty(it, key, { get: function () {
+           return getInternalState(this)[key];
+         } });
+       };
 
-         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 isArrayBuffer = function (it) {
+         var klass;
+         return it instanceof ArrayBuffer || (klass = classof(it)) == 'ArrayBuffer' || klass == 'SharedArrayBuffer';
+       };
 
-         if (sham) createNonEnumerableProperty(RegExp.prototype[SYMBOL], 'sham', true);
+       var isTypedArrayIndex = function (target, key) {
+         return isTypedArray(target)
+           && typeof key != 'symbol'
+           && key in target
+           && String(+key) == String(key);
        };
 
-       var charAt$1 = stringMultibyte.charAt;
+       var wrappedGetOwnPropertyDescriptor = function getOwnPropertyDescriptor(target, key) {
+         return isTypedArrayIndex(target, key = toPrimitive(key, true))
+           ? createPropertyDescriptor(2, target[key])
+           : nativeGetOwnPropertyDescriptor(target, key);
+       };
 
-       // `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 wrappedDefineProperty = function defineProperty(target, key, descriptor) {
+         if (isTypedArrayIndex(target, key = toPrimitive(key, true))
+           && isObject$4(descriptor)
+           && has$1(descriptor, 'value')
+           && !has$1(descriptor, 'get')
+           && !has$1(descriptor, 'set')
+           // TODO: add validation descriptor w/o calling accessors
+           && !descriptor.configurable
+           && (!has$1(descriptor, 'writable') || descriptor.writable)
+           && (!has$1(descriptor, 'enumerable') || descriptor.enumerable)
+         ) {
+           target[key] = descriptor.value;
+           return target;
+         } return nativeDefineProperty(target, key, descriptor);
        };
 
-       // `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;
+       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');
          }
 
-         if (classofRaw(R) !== 'RegExp') {
-           throw TypeError('RegExp#exec called on incompatible receiver');
-         }
+         _export({ target: 'Object', stat: true, forced: !NATIVE_ARRAY_BUFFER_VIEWS }, {
+           getOwnPropertyDescriptor: wrappedGetOwnPropertyDescriptor,
+           defineProperty: wrappedDefineProperty
+         });
 
-         return regexpExec.call(R, S);
-       };
+         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$2[CONSTRUCTOR_NAME];
+           var TypedArrayConstructor = NativeTypedArrayConstructor;
+           var TypedArrayConstructorPrototype = TypedArrayConstructor && TypedArrayConstructor.prototype;
+           var exported = {};
 
-       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 getter = function (that, index) {
+             var data = getInternalState(that);
+             return data.view[GETTER](index * BYTES + data.byteOffset, true);
+           };
 
-       var maybeToString = function (it) {
-         return it === undefined ? it : String(it);
-       };
-
-       // @@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';
-
-         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 rx = anObject(regexp);
-             var S = String(this);
-
-             var functionalReplace = typeof replaceValue === 'function';
-             if (!functionalReplace) replaceValue = String(replaceValue);
-
-             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;
-
-               results.push(result);
-               if (!global) break;
-
-               var matchStr = String(result[0]);
-               if (matchStr === '') rx.lastIndex = advanceStringIndex(S, toLength(rx.lastIndex), fullUnicode);
-             }
-
-             var accumulatedResult = '';
-             var nextSourcePosition = 0;
-             for (var i = 0; i < results.length; i++) {
-               result = results[i];
-
-               var matched = String(result[0]);
-               var position = max$2(min$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);
-           }
-         ];
-
-         // 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 MATCH = wellKnownSymbol('match');
-
-       // `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 arrayPush = [].push;
-       var min$3 = Math.min;
-       var MAX_UINT32 = 0xFFFFFFFF;
-
-       // babel-minify transpiles RegExp('x', 'y') -> /x/y and it causes SyntaxError
-       var SUPPORTS_Y = !fails(function () { return !RegExp(MAX_UINT32, 'y'); });
-
-       // @@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;
-
-         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;
-
-             var rx = anObject(regexp);
-             var S = String(this);
-             var C = speciesConstructor(rx, RegExp);
-
-             var unicodeMatching = rx.unicode;
-             var flags = (rx.ignoreCase ? 'i' : '') +
-                         (rx.multiline ? 'm' : '') +
-                         (rx.unicode ? 'u' : '') +
-                         (SUPPORTS_Y ? 'y' : 'g');
-
-             // ^(? + 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$3(toLength(splitter.lastIndex + (SUPPORTS_Y ? 0 : q)), S.length)) === p
-               ) {
-                 q = advanceStringIndex(S, q, unicodeMatching);
-               } else {
-                 A.push(S.slice(p, q));
-                 if (A.length === lim) return A;
-                 for (var i = 1; i <= z.length - 1; i++) {
-                   A.push(z[i]);
-                   if (A.length === lim) return A;
-                 }
-                 q = p = e;
-               }
-             }
-             A.push(S.slice(p));
-             return A;
-           }
-         ];
-       }, !SUPPORTS_Y);
-
-       // a string of all valid unicode whitespaces
-       // eslint-disable-next-line max-len
-       var whitespaces = '\u0009\u000A\u000B\u000C\u000D\u0020\u00A0\u1680\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200A\u202F\u205F\u3000\u2028\u2029\uFEFF';
-
-       var whitespace = '[' + whitespaces + ']';
-       var ltrim = RegExp('^' + whitespace + whitespace + '*');
-       var rtrim = RegExp(whitespace + whitespace + '*$');
-
-       // `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;
-         };
-       };
-
-       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 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(function () {
-           return !!whitespaces[METHOD_NAME]() || non[METHOD_NAME]() != non || whitespaces[METHOD_NAME].name !== METHOD_NAME;
-         });
-       };
-
-       var $trim = stringTrim.trim;
-
-
-       // `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);
-         }
-       });
-
-       /* eslint-disable no-new */
-
-
-
-       var NATIVE_ARRAY_BUFFER_VIEWS$2 = arrayBufferViewCore.NATIVE_ARRAY_BUFFER_VIEWS;
-
-       var ArrayBuffer$3 = global_1.ArrayBuffer;
-       var Int8Array$2 = global_1.Int8Array;
-
-       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 toPositiveInteger = function (it) {
-         var result = toInteger(it);
-         if (result < 0) throw RangeError("The argument can't be less than 0");
-         return result;
-       };
-
-       var toOffset = function (it, BYTES) {
-         var offset = toPositiveInteger(it);
-         if (offset % BYTES) throw RangeError('Wrong offset');
-         return offset;
-       };
-
-       var aTypedArrayConstructor$1 = arrayBufferViewCore.aTypedArrayConstructor;
-
-       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);
-           }
-         }
-         if (mapping && argumentsLength > 2) {
-           mapfn = functionBindContext(mapfn, arguments[2], 2);
-         }
-         length = toLength(O.length);
-         result = new (aTypedArrayConstructor$1(this))(length);
-         for (i = 0; length > i; i++) {
-           result[i] = mapping ? mapfn(O[i], i) : O[i];
-         }
-         return result;
-       };
-
-       // makes subclassing work correct for wrapped built-ins
-       var inheritIfRequired = function ($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 typedArrayConstructor = createCommonjsModule(function (module) {
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-       var getOwnPropertyNames = objectGetOwnPropertyNames.f;
-
-       var forEach = arrayIteration.forEach;
-
-
-
-
-
-
-       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';
-
-       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 addGetter = function (it, key) {
-         nativeDefineProperty(it, key, { get: function () {
-           return getInternalState(this)[key];
-         } });
-       };
-
-       var isArrayBuffer = function (it) {
-         var klass;
-         return it instanceof ArrayBuffer || (klass = classof(it)) == 'ArrayBuffer' || klass == 'SharedArrayBuffer';
-       };
-
-       var isTypedArrayIndex = function (target, key) {
-         return isTypedArray(target)
-           && typeof key != 'symbol'
-           && key in target
-           && String(+key) == String(key);
-       };
-
-       var wrappedGetOwnPropertyDescriptor = function getOwnPropertyDescriptor(target, key) {
-         return isTypedArrayIndex(target, key = toPrimitive(key, true))
-           ? createPropertyDescriptor(2, target[key])
-           : nativeGetOwnPropertyDescriptor(target, key);
-       };
-
-       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);
-       };
-
-       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');
-         }
-
-         _export({ target: 'Object', stat: true, forced: !NATIVE_ARRAY_BUFFER_VIEWS }, {
-           getOwnPropertyDescriptor: wrappedGetOwnPropertyDescriptor,
-           defineProperty: wrappedDefineProperty
-         });
-
-         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 getter = function (that, index) {
-             var data = getInternalState(that);
-             return data.view[GETTER](index * BYTES + data.byteOffset, true);
-           };
-
-           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 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, {
                var index = 0;
                var byteOffset = 0;
                var buffer, byteLength, length;
-               if (!isObject(data)) {
+               if (!isObject$4(data)) {
                  length = toIndex(data);
                  byteLength = length * BYTES;
                  buffer = new ArrayBuffer(byteLength);
              TypedArrayConstructor = wrapper(function (dummy, data, typedArrayOffset, $length) {
                anInstance(dummy, TypedArrayConstructor, CONSTRUCTOR_NAME);
                return inheritIfRequired(function () {
-                 if (!isObject(data)) return new NativeTypedArrayConstructor(toIndex(data));
+                 if (!isObject$4(data)) return new NativeTypedArrayConstructor(toIndex(data));
                  if (isArrayBuffer(data)) return $length !== undefined
                    ? new NativeTypedArrayConstructor(data, toOffset(typedArrayOffset, BYTES), $length)
                    : typedArrayOffset !== undefined
        });
 
        // `Uint8Array` constructor
-       // https://tc39.github.io/ecma262/#sec-typedarray-objects
+       // https://tc39.es/ecma262/#sec-typedarray-objects
        typedArrayConstructor('Uint8', function (init) {
          return function Uint8Array(data, byteOffset, length) {
            return init(this, data, byteOffset, length);
          };
        });
 
-       var min$4 = Math.min;
+       var min$7 = Math.min;
 
        // `Array.prototype.copyWithin` method implementation
-       // https://tc39.github.io/ecma262/#sec-array.prototype.copywithin
+       // 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(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 count = min$7((end === undefined ? len : toAbsoluteIndex(end, len)) - from, len - to);
          var inc = 1;
          if (from < to && to < from + count) {
            inc = -1;
          } return O;
        };
 
-       var aTypedArray$1 = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$1 = arrayBufferViewCore.exportTypedArrayMethod;
+       var aTypedArray$l = arrayBufferViewCore.aTypedArray;
+       var exportTypedArrayMethod$m = arrayBufferViewCore.exportTypedArrayMethod;
 
        // `%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$1(this), target, start, arguments.length > 2 ? arguments[2] : undefined);
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.copywithin
+       exportTypedArrayMethod$m('copyWithin', function copyWithin(target, start /* , end */) {
+         return arrayCopyWithin.call(aTypedArray$l(this), target, start, arguments.length > 2 ? arguments[2] : undefined);
        });
 
-       var $every = arrayIteration.every;
+       var $every$1 = arrayIteration.every;
 
-       var aTypedArray$2 = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$2 = arrayBufferViewCore.exportTypedArrayMethod;
+       var aTypedArray$k = arrayBufferViewCore.aTypedArray;
+       var exportTypedArrayMethod$l = arrayBufferViewCore.exportTypedArrayMethod;
 
        // `%TypedArray%.prototype.every` method
-       // https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.every
-       exportTypedArrayMethod$2('every', function every(callbackfn /* , thisArg */) {
-         return $every(aTypedArray$2(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.every
+       exportTypedArrayMethod$l('every', function every(callbackfn /* , thisArg */) {
+         return $every$1(aTypedArray$k(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);
        });
 
-       var aTypedArray$3 = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$3 = arrayBufferViewCore.exportTypedArrayMethod;
+       var aTypedArray$j = arrayBufferViewCore.aTypedArray;
+       var exportTypedArrayMethod$k = arrayBufferViewCore.exportTypedArrayMethod;
 
        // `%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$3(this), arguments);
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.fill
+       // eslint-disable-next-line no-unused-vars -- required for `.length`
+       exportTypedArrayMethod$k('fill', function fill(value /* , start, end */) {
+         return arrayFill.apply(aTypedArray$j(this), arguments);
        });
 
-       var $filter = arrayIteration.filter;
-
-
-       var aTypedArray$4 = arrayBufferViewCore.aTypedArray;
        var aTypedArrayConstructor$2 = arrayBufferViewCore.aTypedArrayConstructor;
-       var exportTypedArrayMethod$4 = arrayBufferViewCore.exportTypedArrayMethod;
 
-       // `%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 typedArrayFromSpeciesAndList = function (instance, list) {
+         var C = speciesConstructor(instance, instance.constructor);
          var index = 0;
          var length = list.length;
          var result = new (aTypedArrayConstructor$2(C))(length);
          while (length > index) result[index] = list[index++];
          return result;
+       };
+
+       var $filter$1 = arrayIteration.filter;
+
+
+       var aTypedArray$i = arrayBufferViewCore.aTypedArray;
+       var exportTypedArrayMethod$j = arrayBufferViewCore.exportTypedArrayMethod;
+
+       // `%TypedArray%.prototype.filter` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.filter
+       exportTypedArrayMethod$j('filter', function filter(callbackfn /* , thisArg */) {
+         var list = $filter$1(aTypedArray$i(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+         return typedArrayFromSpeciesAndList(this, list);
        });
 
-       var $find = arrayIteration.find;
+       var $find$1 = arrayIteration.find;
 
-       var aTypedArray$5 = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$5 = arrayBufferViewCore.exportTypedArrayMethod;
+       var aTypedArray$h = arrayBufferViewCore.aTypedArray;
+       var exportTypedArrayMethod$i = arrayBufferViewCore.exportTypedArrayMethod;
 
        // `%TypedArray%.prototype.find` method
-       // https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.find
-       exportTypedArrayMethod$5('find', function find(predicate /* , thisArg */) {
-         return $find(aTypedArray$5(this), predicate, arguments.length > 1 ? arguments[1] : undefined);
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.find
+       exportTypedArrayMethod$i('find', function find(predicate /* , thisArg */) {
+         return $find$1(aTypedArray$h(this), predicate, arguments.length > 1 ? arguments[1] : undefined);
        });
 
-       var $findIndex = arrayIteration.findIndex;
+       var $findIndex$1 = arrayIteration.findIndex;
 
-       var aTypedArray$6 = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$6 = arrayBufferViewCore.exportTypedArrayMethod;
+       var aTypedArray$g = arrayBufferViewCore.aTypedArray;
+       var exportTypedArrayMethod$h = arrayBufferViewCore.exportTypedArrayMethod;
 
        // `%TypedArray%.prototype.findIndex` method
-       // https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.findindex
-       exportTypedArrayMethod$6('findIndex', function findIndex(predicate /* , thisArg */) {
-         return $findIndex(aTypedArray$6(this), predicate, arguments.length > 1 ? arguments[1] : undefined);
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.findindex
+       exportTypedArrayMethod$h('findIndex', function findIndex(predicate /* , thisArg */) {
+         return $findIndex$1(aTypedArray$g(this), predicate, arguments.length > 1 ? arguments[1] : undefined);
        });
 
-       var $forEach$2 = arrayIteration.forEach;
+       var $forEach = arrayIteration.forEach;
 
-       var aTypedArray$7 = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$7 = arrayBufferViewCore.exportTypedArrayMethod;
+       var aTypedArray$f = arrayBufferViewCore.aTypedArray;
+       var exportTypedArrayMethod$g = arrayBufferViewCore.exportTypedArrayMethod;
 
        // `%TypedArray%.prototype.forEach` method
-       // https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.foreach
-       exportTypedArrayMethod$7('forEach', function forEach(callbackfn /* , thisArg */) {
-         $forEach$2(aTypedArray$7(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.foreach
+       exportTypedArrayMethod$g('forEach', function forEach(callbackfn /* , thisArg */) {
+         $forEach(aTypedArray$f(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);
        });
 
-       var $includes = arrayIncludes.includes;
+       var $includes$1 = arrayIncludes.includes;
 
-       var aTypedArray$8 = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$8 = arrayBufferViewCore.exportTypedArrayMethod;
+       var aTypedArray$e = arrayBufferViewCore.aTypedArray;
+       var exportTypedArrayMethod$f = arrayBufferViewCore.exportTypedArrayMethod;
 
        // `%TypedArray%.prototype.includes` method
-       // https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.includes
-       exportTypedArrayMethod$8('includes', function includes(searchElement /* , fromIndex */) {
-         return $includes(aTypedArray$8(this), searchElement, arguments.length > 1 ? arguments[1] : undefined);
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.includes
+       exportTypedArrayMethod$f('includes', function includes(searchElement /* , fromIndex */) {
+         return $includes$1(aTypedArray$e(this), searchElement, arguments.length > 1 ? arguments[1] : undefined);
        });
 
-       var $indexOf$1 = arrayIncludes.indexOf;
+       var $indexOf = arrayIncludes.indexOf;
 
-       var aTypedArray$9 = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$9 = arrayBufferViewCore.exportTypedArrayMethod;
+       var aTypedArray$d = arrayBufferViewCore.aTypedArray;
+       var exportTypedArrayMethod$e = arrayBufferViewCore.exportTypedArrayMethod;
 
        // `%TypedArray%.prototype.indexOf` method
-       // https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.indexof
-       exportTypedArrayMethod$9('indexOf', function indexOf(searchElement /* , fromIndex */) {
-         return $indexOf$1(aTypedArray$9(this), searchElement, arguments.length > 1 ? arguments[1] : undefined);
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.indexof
+       exportTypedArrayMethod$e('indexOf', function indexOf(searchElement /* , fromIndex */) {
+         return $indexOf(aTypedArray$d(this), searchElement, arguments.length > 1 ? arguments[1] : undefined);
        });
 
-       var ITERATOR$5 = wellKnownSymbol('iterator');
-       var Uint8Array$1 = global_1.Uint8Array;
+       var ITERATOR$2 = wellKnownSymbol('iterator');
+       var Uint8Array$2 = global$2.Uint8Array;
        var arrayValues = es_array_iterator.values;
        var arrayKeys = es_array_iterator.keys;
        var arrayEntries = es_array_iterator.entries;
-       var aTypedArray$a = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$a = arrayBufferViewCore.exportTypedArrayMethod;
-       var nativeTypedArrayIterator = Uint8Array$1 && Uint8Array$1.prototype[ITERATOR$5];
+       var aTypedArray$c = arrayBufferViewCore.aTypedArray;
+       var exportTypedArrayMethod$d = arrayBufferViewCore.exportTypedArrayMethod;
+       var nativeTypedArrayIterator = Uint8Array$2 && Uint8Array$2.prototype[ITERATOR$2];
 
        var CORRECT_ITER_NAME = !!nativeTypedArrayIterator
          && (nativeTypedArrayIterator.name == 'values' || nativeTypedArrayIterator.name == undefined);
 
        var typedArrayValues = function values() {
-         return arrayValues.call(aTypedArray$a(this));
+         return arrayValues.call(aTypedArray$c(this));
        };
 
        // `%TypedArray%.prototype.entries` method
-       // https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.entries
-       exportTypedArrayMethod$a('entries', function entries() {
-         return arrayEntries.call(aTypedArray$a(this));
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.entries
+       exportTypedArrayMethod$d('entries', function entries() {
+         return arrayEntries.call(aTypedArray$c(this));
        });
        // `%TypedArray%.prototype.keys` method
-       // https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.keys
-       exportTypedArrayMethod$a('keys', function keys() {
-         return arrayKeys.call(aTypedArray$a(this));
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.keys
+       exportTypedArrayMethod$d('keys', function keys() {
+         return arrayKeys.call(aTypedArray$c(this));
        });
        // `%TypedArray%.prototype.values` method
-       // https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.values
-       exportTypedArrayMethod$a('values', typedArrayValues, !CORRECT_ITER_NAME);
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.values
+       exportTypedArrayMethod$d('values', typedArrayValues, !CORRECT_ITER_NAME);
        // `%TypedArray%.prototype[@@iterator]` method
-       // https://tc39.github.io/ecma262/#sec-%typedarray%.prototype-@@iterator
-       exportTypedArrayMethod$a(ITERATOR$5, typedArrayValues, !CORRECT_ITER_NAME);
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype-@@iterator
+       exportTypedArrayMethod$d(ITERATOR$2, typedArrayValues, !CORRECT_ITER_NAME);
 
        var aTypedArray$b = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$b = arrayBufferViewCore.exportTypedArrayMethod;
+       var exportTypedArrayMethod$c = arrayBufferViewCore.exportTypedArrayMethod;
        var $join = [].join;
 
        // `%TypedArray%.prototype.join` method
-       // https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.join
-       // eslint-disable-next-line no-unused-vars
-       exportTypedArrayMethod$b('join', function join(separator) {
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.join
+       // eslint-disable-next-line no-unused-vars -- required for `.length`
+       exportTypedArrayMethod$c('join', function join(separator) {
          return $join.apply(aTypedArray$b(this), arguments);
        });
 
-       var 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;
+       /* eslint-disable es/no-array-prototype-lastindexof -- safe */
+
+
+
+
+
+       var min$6 = Math.min;
+       var $lastIndexOf = [].lastIndexOf;
+       var NEGATIVE_ZERO = !!$lastIndexOf && 1 / [1].lastIndexOf(1, -0) < 0;
+       var STRICT_METHOD$5 = arrayMethodIsStrict('lastIndexOf');
+       var FORCED$e = NEGATIVE_ZERO || !STRICT_METHOD$5;
 
        // `Array.prototype.lastIndexOf` method implementation
-       // https://tc39.github.io/ecma262/#sec-array.prototype.lastindexof
-       var arrayLastIndexOf = FORCED$1 ? function lastIndexOf(searchElement /* , fromIndex = @[*-1] */) {
+       // https://tc39.es/ecma262/#sec-array.prototype.lastindexof
+       var arrayLastIndexOf = FORCED$e ? function lastIndexOf(searchElement /* , fromIndex = @[*-1] */) {
          // convert -0 to +0
-         if (NEGATIVE_ZERO$1) return nativeLastIndexOf.apply(this, arguments) || 0;
+         if (NEGATIVE_ZERO) return $lastIndexOf.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 (arguments.length > 1) index = min$6(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;
+       } : $lastIndexOf;
 
-       var aTypedArray$c = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$c = arrayBufferViewCore.exportTypedArrayMethod;
+       var aTypedArray$a = arrayBufferViewCore.aTypedArray;
+       var exportTypedArrayMethod$b = arrayBufferViewCore.exportTypedArrayMethod;
 
        // `%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);
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.lastindexof
+       // eslint-disable-next-line no-unused-vars -- required for `.length`
+       exportTypedArrayMethod$b('lastIndexOf', function lastIndexOf(searchElement /* , fromIndex */) {
+         return arrayLastIndexOf.apply(aTypedArray$a(this), arguments);
        });
 
-       var $map$1 = arrayIteration.map;
+       var $map = arrayIteration.map;
 
 
-       var aTypedArray$d = arrayBufferViewCore.aTypedArray;
-       var aTypedArrayConstructor$3 = arrayBufferViewCore.aTypedArrayConstructor;
-       var exportTypedArrayMethod$d = arrayBufferViewCore.exportTypedArrayMethod;
+       var aTypedArray$9 = arrayBufferViewCore.aTypedArray;
+       var aTypedArrayConstructor$1 = arrayBufferViewCore.aTypedArrayConstructor;
+       var exportTypedArrayMethod$a = arrayBufferViewCore.exportTypedArrayMethod;
 
        // `%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$3(speciesConstructor(O, O.constructor)))(length);
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.map
+       exportTypedArrayMethod$a('map', function map(mapfn /* , thisArg */) {
+         return $map(aTypedArray$9(this), mapfn, arguments.length > 1 ? arguments[1] : undefined, function (O, length) {
+           return new (aTypedArrayConstructor$1(speciesConstructor(O, O.constructor)))(length);
          });
        });
 
        // `Array.prototype.{ reduce, reduceRight }` methods implementation
-       var createMethod$4 = function (IS_RIGHT) {
+       var createMethod$3 = function (IS_RIGHT) {
          return function (that, callbackfn, argumentsLength, memo) {
-           aFunction$1(callbackfn);
+           aFunction(callbackfn);
            var O = toObject(that);
            var self = indexedObject(O);
            var length = toLength(O.length);
 
        var arrayReduce = {
          // `Array.prototype.reduce` method
-         // https://tc39.github.io/ecma262/#sec-array.prototype.reduce
-         left: createMethod$4(false),
+         // https://tc39.es/ecma262/#sec-array.prototype.reduce
+         left: createMethod$3(false),
          // `Array.prototype.reduceRight` method
-         // https://tc39.github.io/ecma262/#sec-array.prototype.reduceright
-         right: createMethod$4(true)
+         // https://tc39.es/ecma262/#sec-array.prototype.reduceright
+         right: createMethod$3(true)
        };
 
-       var $reduce = arrayReduce.left;
+       var $reduce$1 = arrayReduce.left;
 
-       var aTypedArray$e = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$e = arrayBufferViewCore.exportTypedArrayMethod;
+       var aTypedArray$8 = arrayBufferViewCore.aTypedArray;
+       var exportTypedArrayMethod$9 = 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);
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.reduce
+       exportTypedArrayMethod$9('reduce', function reduce(callbackfn /* , initialValue */) {
+         return $reduce$1(aTypedArray$8(this), callbackfn, arguments.length, arguments.length > 1 ? arguments[1] : undefined);
        });
 
        var $reduceRight = arrayReduce.right;
 
-       var aTypedArray$f = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$f = arrayBufferViewCore.exportTypedArrayMethod;
+       var aTypedArray$7 = arrayBufferViewCore.aTypedArray;
+       var exportTypedArrayMethod$8 = arrayBufferViewCore.exportTypedArrayMethod;
 
        // `%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);
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.reduceright
+       exportTypedArrayMethod$8('reduceRight', function reduceRight(callbackfn /* , initialValue */) {
+         return $reduceRight(aTypedArray$7(this), callbackfn, arguments.length, arguments.length > 1 ? arguments[1] : undefined);
        });
 
-       var aTypedArray$g = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$g = arrayBufferViewCore.exportTypedArrayMethod;
-       var floor$3 = Math.floor;
+       var aTypedArray$6 = arrayBufferViewCore.aTypedArray;
+       var exportTypedArrayMethod$7 = arrayBufferViewCore.exportTypedArrayMethod;
+       var floor$5 = Math.floor;
 
        // `%TypedArray%.prototype.reverse` method
-       // https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.reverse
-       exportTypedArrayMethod$g('reverse', function reverse() {
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.reverse
+       exportTypedArrayMethod$7('reverse', function reverse() {
          var that = this;
-         var length = aTypedArray$g(that).length;
-         var middle = floor$3(length / 2);
+         var length = aTypedArray$6(that).length;
+         var middle = floor$5(length / 2);
          var index = 0;
          var value;
          while (index < middle) {
          } return that;
        });
 
-       var aTypedArray$h = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$h = arrayBufferViewCore.exportTypedArrayMethod;
+       var aTypedArray$5 = arrayBufferViewCore.aTypedArray;
+       var exportTypedArrayMethod$6 = arrayBufferViewCore.exportTypedArrayMethod;
 
-       var FORCED$2 = fails(function () {
-         // eslint-disable-next-line no-undef
+       var FORCED$d = fails(function () {
+         // eslint-disable-next-line es/no-typed-arrays -- required for testing
          new Int8Array(1).set({});
        });
 
        // `%TypedArray%.prototype.set` method
-       // https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.set
-       exportTypedArrayMethod$h('set', function set(arrayLike /* , offset */) {
-         aTypedArray$h(this);
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.set
+       exportTypedArrayMethod$6('set', function set(arrayLike /* , offset */) {
+         aTypedArray$5(this);
          var offset = toOffset(arguments.length > 1 ? arguments[1] : undefined, 1);
          var length = this.length;
          var src = toObject(arrayLike);
          var index = 0;
          if (len + offset > length) throw RangeError('Wrong length');
          while (index < len) this[offset + index] = src[index++];
-       }, FORCED$2);
+       }, FORCED$d);
 
-       var aTypedArray$i = arrayBufferViewCore.aTypedArray;
-       var aTypedArrayConstructor$4 = arrayBufferViewCore.aTypedArrayConstructor;
-       var exportTypedArrayMethod$i = arrayBufferViewCore.exportTypedArrayMethod;
-       var $slice = [].slice;
+       var aTypedArray$4 = arrayBufferViewCore.aTypedArray;
+       var aTypedArrayConstructor = arrayBufferViewCore.aTypedArrayConstructor;
+       var exportTypedArrayMethod$5 = arrayBufferViewCore.exportTypedArrayMethod;
+       var $slice$1 = [].slice;
 
-       var FORCED$3 = fails(function () {
-         // eslint-disable-next-line no-undef
+       var FORCED$c = fails(function () {
+         // eslint-disable-next-line es/no-typed-arrays -- required for testing
          new Int8Array(1).slice();
        });
 
        // `%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);
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.slice
+       exportTypedArrayMethod$5('slice', function slice(start, end) {
+         var list = $slice$1.call(aTypedArray$4(this), start, end);
          var C = speciesConstructor(this, this.constructor);
          var index = 0;
          var length = list.length;
-         var result = new (aTypedArrayConstructor$4(C))(length);
+         var result = new (aTypedArrayConstructor(C))(length);
          while (length > index) result[index] = list[index++];
          return result;
-       }, FORCED$3);
+       }, FORCED$c);
 
-       var $some = arrayIteration.some;
+       var $some$1 = arrayIteration.some;
 
-       var aTypedArray$j = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$j = arrayBufferViewCore.exportTypedArrayMethod;
+       var aTypedArray$3 = arrayBufferViewCore.aTypedArray;
+       var exportTypedArrayMethod$4 = arrayBufferViewCore.exportTypedArrayMethod;
 
        // `%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);
+       // 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 aTypedArray$k = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$k = arrayBufferViewCore.exportTypedArrayMethod;
-       var $sort = [].sort;
+       // TODO: use something more complex like timsort?
+       var floor$4 = Math.floor;
 
-       // `%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 mergeSort = function (array, comparefn) {
+         var length = array.length;
+         var middle = floor$4(length / 2);
+         return length < 8 ? insertionSort(array, comparefn) : merge$5(
+           mergeSort(array.slice(0, middle), comparefn),
+           mergeSort(array.slice(middle), comparefn),
+           comparefn
+         );
+       };
+
+       var insertionSort = function (array, comparefn) {
+         var length = array.length;
+         var i = 1;
+         var element, j;
+
+         while (i < length) {
+           j = i;
+           element = array[i];
+           while (j && comparefn(array[j - 1], element) > 0) {
+             array[j] = array[--j];
+           }
+           if (j !== i++) array[j] = element;
+         } return array;
+       };
+
+       var merge$5 = function (left, right, comparefn) {
+         var llength = left.length;
+         var rlength = right.length;
+         var lindex = 0;
+         var rindex = 0;
+         var result = [];
+
+         while (lindex < llength || rindex < rlength) {
+           if (lindex < llength && rindex < rlength) {
+             result.push(comparefn(left[lindex], right[rindex]) <= 0 ? left[lindex++] : right[rindex++]);
+           } else {
+             result.push(lindex < llength ? left[lindex++] : right[rindex++]);
+           }
+         } return result;
+       };
+
+       var arraySort = mergeSort;
+
+       var firefox = engineUserAgent.match(/firefox\/(\d+)/i);
+
+       var engineFfVersion = !!firefox && +firefox[1];
+
+       var engineIsIeOrEdge = /MSIE|Trident/.test(engineUserAgent);
+
+       var webkit = engineUserAgent.match(/AppleWebKit\/(\d+)\./);
+
+       var engineWebkitVersion = !!webkit && +webkit[1];
+
+       var aTypedArray$2 = arrayBufferViewCore.aTypedArray;
+       var exportTypedArrayMethod$3 = arrayBufferViewCore.exportTypedArrayMethod;
+       var Uint16Array = global$2.Uint16Array;
+       var nativeSort$1 = Uint16Array && Uint16Array.prototype.sort;
+
+       // WebKit
+       var ACCEPT_INCORRECT_ARGUMENTS = !!nativeSort$1 && !fails(function () {
+         var array = new Uint16Array(2);
+         array.sort(null);
+         array.sort({});
        });
 
-       var aTypedArray$l = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$l = arrayBufferViewCore.exportTypedArrayMethod;
+       var STABLE_SORT$1 = !!nativeSort$1 && !fails(function () {
+         // feature detection can be too slow, so check engines versions
+         if (engineV8Version) return engineV8Version < 74;
+         if (engineFfVersion) return engineFfVersion < 67;
+         if (engineIsIeOrEdge) return true;
+         if (engineWebkitVersion) return engineWebkitVersion < 602;
+
+         var array = new Uint16Array(516);
+         var expected = Array(516);
+         var index, mod;
+
+         for (index = 0; index < 516; index++) {
+           mod = index % 4;
+           array[index] = 515 - index;
+           expected[index] = index - 2 * mod + 3;
+         }
+
+         array.sort(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;
+         };
+       };
+
+       // `%TypedArray%.prototype.sort` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.sort
+       exportTypedArrayMethod$3('sort', function sort(comparefn) {
+         var array = this;
+         if (comparefn !== undefined) aFunction(comparefn);
+         if (STABLE_SORT$1) return nativeSort$1.call(array, comparefn);
+
+         aTypedArray$2(array);
+         var arrayLength = toLength(array.length);
+         var items = Array(arrayLength);
+         var index;
+
+         for (index = 0; index < arrayLength; index++) {
+           items[index] = array[index];
+         }
+
+         items = arraySort(array, getSortCompare$1(comparefn));
+
+         for (index = 0; index < arrayLength; index++) {
+           array[index] = items[index];
+         }
+
+         return array;
+       }, !STABLE_SORT$1 || ACCEPT_INCORRECT_ARGUMENTS);
+
+       var aTypedArray$1 = arrayBufferViewCore.aTypedArray;
+       var exportTypedArrayMethod$2 = arrayBufferViewCore.exportTypedArrayMethod;
 
        // `%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);
+       // 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(begin, length);
          return new (speciesConstructor(O, O.constructor))(
          );
        });
 
-       var Int8Array$3 = global_1.Int8Array;
-       var aTypedArray$m = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$m = arrayBufferViewCore.exportTypedArrayMethod;
+       var Int8Array$1 = global$2.Int8Array;
+       var aTypedArray = arrayBufferViewCore.aTypedArray;
+       var exportTypedArrayMethod$1 = arrayBufferViewCore.exportTypedArrayMethod;
        var $toLocaleString = [].toLocaleString;
-       var $slice$1 = [].slice;
+       var $slice = [].slice;
 
        // iOS Safari 6.x fails here
-       var TO_LOCALE_STRING_BUG = !!Int8Array$3 && fails(function () {
-         $toLocaleString.call(new Int8Array$3(1));
+       var TO_LOCALE_STRING_BUG = !!Int8Array$1 && fails(function () {
+         $toLocaleString.call(new Int8Array$1(1));
        });
 
-       var FORCED$4 = fails(function () {
-         return [1, 2].toLocaleString() != new Int8Array$3([1, 2]).toLocaleString();
+       var FORCED$b = fails(function () {
+         return [1, 2].toLocaleString() != new Int8Array$1([1, 2]).toLocaleString();
        }) || !fails(function () {
-         Int8Array$3.prototype.toLocaleString.call([1, 2]);
+         Int8Array$1.prototype.toLocaleString.call([1, 2]);
        });
 
        // `%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);
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.tolocalestring
+       exportTypedArrayMethod$1('toLocaleString', function toLocaleString() {
+         return $toLocaleString.apply(TO_LOCALE_STRING_BUG ? $slice.call(aTypedArray(this)) : aTypedArray(this), arguments);
+       }, FORCED$b);
 
-       var exportTypedArrayMethod$n = arrayBufferViewCore.exportTypedArrayMethod;
+       var exportTypedArrayMethod = arrayBufferViewCore.exportTypedArrayMethod;
 
 
 
-       var Uint8Array$2 = global_1.Uint8Array;
-       var Uint8ArrayPrototype = Uint8Array$2 && Uint8Array$2.prototype || {};
+       var Uint8Array$1 = global$2.Uint8Array;
+       var Uint8ArrayPrototype = Uint8Array$1 && Uint8Array$1.prototype || {};
        var arrayToString = [].toString;
        var arrayJoin = [].join;
 
        var IS_NOT_ARRAY_METHOD = Uint8ArrayPrototype.toString != arrayToString;
 
        // `%TypedArray%.prototype.toString` method
-       // https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.tostring
-       exportTypedArrayMethod$n('toString', arrayToString, IS_NOT_ARRAY_METHOD);
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.tostring
+       exportTypedArrayMethod('toString', arrayToString, IS_NOT_ARRAY_METHOD);
 
-       // 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 nativeJoin = [].join;
 
-       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 ES3_STRINGS = indexedObject != Object;
+       var STRICT_METHOD$4 = arrayMethodIsStrict('join', ',');
+
+       // `Array.prototype.join` method
+       // https://tc39.es/ecma262/#sec-array.prototype.join
+       _export({ target: 'Array', proto: true, forced: ES3_STRINGS || !STRICT_METHOD$4 }, {
+         join: function join(separator) {
+           return nativeJoin.call(toIndexedObject(this), separator === undefined ? ',' : separator);
          }
-       }
+       });
 
-       var ITERATOR$6 = wellKnownSymbol('iterator');
-       var TO_STRING_TAG$4 = wellKnownSymbol('toStringTag');
-       var ArrayValues = es_array_iterator.values;
+       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;
+       };
 
-       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]);
-             } catch (error) {
-               CollectionPrototype$1[METHOD_NAME] = es_array_iterator[METHOD_NAME];
+       var HAS_SPECIES_SUPPORT$2 = arrayMethodHasSpeciesSupport('slice');
+
+       var SPECIES$1 = wellKnownSymbol('species');
+       var nativeSlice = [].slice;
+       var max$3 = Math.max;
+
+       // `Array.prototype.slice` method
+       // https://tc39.es/ecma262/#sec-array.prototype.slice
+       // fallback for not array-like ES3 strings and DOM objects
+       _export({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT$2 }, {
+         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$4(Constructor)) {
+               Constructor = Constructor[SPECIES$1];
+               if (Constructor === null) Constructor = undefined;
+             }
+             if (Constructor === Array || Constructor === undefined) {
+               return nativeSlice.call(O, k, fin);
              }
            }
+           result = new (Constructor === undefined ? Array : Constructor)(max$3(fin - k, 0));
+           for (n = 0; k < fin; k++, n++) if (k in O) createProperty(result, n, O[k]);
+           result.length = n;
+           return result;
          }
-       }
-
-       var slice = [].slice;
-       var MSIE = /MSIE .\./.test(engineUserAgent); // <- dirty ie9- check
-
-       var wrap$1 = function (scheduler) {
-         return function (handler, timeout /* , ...arguments */) {
-           var boundArgs = arguments.length > 2;
-           var args = boundArgs ? slice.call(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);
-         };
-       };
-
-       // 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 }, {
-         // `setTimeout` method
-         // https://html.spec.whatwg.org/multipage/timers-and-user-prompts.html#dom-settimeout
-         setTimeout: wrap$1(global_1.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 ITERATOR$1 = wellKnownSymbol('iterator');
 
        var nativeUrl = !fails(function () {
          var url = new URL('b?a=1&b=2&c=3', 'http://a');
            || url.href !== 'http://a/c%20d?a=1&c=3'
            || searchParams.get('c') !== '3'
            || String(new URLSearchParams('?a=1')) !== 'a=1'
-           || !searchParams[ITERATOR$7]
+           || !searchParams[ITERATOR$1]
            // throws in Edge
            || new URL('https://a@b').username !== 'a'
            || new URLSearchParams(new URLSearchParams('a=b')).get('a') !== 'b'
            || new URL('http://x', undefined).host !== 'x';
        });
 
-       var nativeAssign = Object.assign;
-       var defineProperty$7 = Object.defineProperty;
+       // 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;
 
        // `Object.assign` method
-       // https://tc39.github.io/ecma262/#sec-object.assign
-       var objectAssign = !nativeAssign || fails(function () {
+       // https://tc39.es/ecma262/#sec-object.assign
+       var objectAssign = !$assign || fails(function () {
          // should have correct order of operations (Edge bug)
-         if (descriptors && nativeAssign({ b: 1 }, nativeAssign(defineProperty$7({}, 'a', {
+         if (descriptors && $assign({ b: 1 }, $assign(defineProperty$4({}, 'a', {
            enumerable: true,
            get: function () {
-             defineProperty$7(this, 'b', {
+             defineProperty$4(this, 'b', {
                value: 3,
                enumerable: false
              });
          // should work with symbols and should have deterministic property order (V8 bug)
          var A = {};
          var B = {};
-         // eslint-disable-next-line no-undef
+         // 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 nativeAssign({}, A)[symbol] != 7 || objectKeys(nativeAssign({}, B)).join('') != alphabet;
-       }) ? function assign(target, source) { // eslint-disable-line no-unused-vars
+         return $assign({}, A)[symbol] != 7 || objectKeys($assign({}, B)).join('') != alphabet;
+       }) ? function assign(target, source) { // eslint-disable-line no-unused-vars -- required for `.length`
          var T = toObject(target);
          var argumentsLength = arguments.length;
          var index = 1;
              if (!descriptors || propertyIsEnumerable.call(S, key)) T[key] = S[key];
            }
          } return T;
-       } : nativeAssign;
+       } : $assign;
 
        // 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) {
            iteratorClose(iterator);
            throw error;
        };
 
        // `Array.from` method implementation
-       // https://tc39.github.io/ecma262/#sec-array.from
+       // https://tc39.es/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 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 floor$3 = Math.floor;
        var stringFromCharCode = String.fromCharCode;
 
        /**
         */
        var adapt = function (delta, numPoints, firstTime) {
          var k = 0;
-         delta = firstTime ? floor$4(delta / damp) : delta >> 1;
-         delta += floor$4(delta / numPoints);
+         delta = firstTime ? floor$3(delta / damp) : delta >> 1;
+         delta += floor$3(delta / numPoints);
          for (; delta > baseMinusTMin * tMax >> 1; k += base) {
-           delta = floor$4(delta / baseMinusTMin);
+           delta = floor$3(delta / baseMinusTMin);
          }
-         return floor$4(k + (baseMinusTMin + 1) * delta / (delta + skew));
+         return floor$3(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
+       // eslint-disable-next-line max-statements -- TODO
        var encode = function (input) {
          var output = [];
 
 
            // 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)) {
+           if (m - n > floor$3((maxInt - delta) / handledCPCountPlusOne)) {
              throw RangeError(OVERFLOW_ERROR);
            }
 
                  var qMinusT = q - t;
                  var baseMinusT = base - t;
                  output.push(stringFromCharCode(digitToBasic(t + qMinusT % baseMinusT)));
-                 q = floor$4(qMinusT / baseMinusT);
+                 q = floor$3(qMinusT / baseMinusT);
                }
 
                output.push(stringFromCharCode(digitToBasic(q)));
 
 
 
-       var $fetch$1 = getBuiltIn('fetch');
-       var Headers = getBuiltIn('Headers');
-       var ITERATOR$8 = wellKnownSymbol('iterator');
+       var $fetch = getBuiltIn('fetch');
+       var Headers$1 = getBuiltIn('Headers');
+       var ITERATOR = wellKnownSymbol('iterator');
        var URL_SEARCH_PARAMS = 'URLSearchParams';
        var URL_SEARCH_PARAMS_ITERATOR = URL_SEARCH_PARAMS + 'Iterator';
-       var setInternalState$5 = internalState.set;
+       var setInternalState$2 = internalState.set;
        var getInternalParamsState = internalState.getterFor(URL_SEARCH_PARAMS);
        var getInternalIteratorState = internalState.getterFor(URL_SEARCH_PARAMS_ITERATOR);
 
          }
        };
 
-       var find = /[!'()~]|%20/g;
+       var find$1 = /[!'()~]|%20/g;
 
-       var replace = {
+       var replace$1 = {
          '!': '%21',
          "'": '%27',
          '(': '%28',
        };
 
        var replacer = function (match) {
-         return replace[match];
+         return replace$1[match];
        };
 
        var serialize = function (it) {
-         return encodeURIComponent(it).replace(find, replacer);
+         return encodeURIComponent(it).replace(find$1, replacer);
        };
 
        var parseSearchParams = function (result, query) {
        };
 
        var URLSearchParamsIterator = createIteratorConstructor(function Iterator(params, kind) {
-         setInternalState$5(this, {
+         setInternalState$2(this, {
            type: URL_SEARCH_PARAMS_ITERATOR,
            iterator: getIterator(getInternalParamsState(params).entries),
            kind: kind
          var entries = [];
          var iteratorMethod, iterator, next, step, entryIterator, entryNext, first, second, key;
 
-         setInternalState$5(that, {
+         setInternalState$2(that, {
            type: URL_SEARCH_PARAMS,
            entries: entries,
            updateURL: function () { /* empty */ },
          });
 
          if (init !== undefined) {
-           if (isObject(init)) {
+           if (isObject$4(init)) {
              iteratorMethod = getIteratorMethod(init);
              if (typeof iteratorMethod === 'function') {
                iterator = iteratorMethod.call(init);
                  ) 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 for (key in init) if (has$1(init, key)) entries.push({ key: key, value: init[key] + '' });
            } else {
              parseSearchParams(entries, typeof init === 'string' ? init.charAt(0) === '?' ? init.slice(1) : init : init + '');
            }
        }, { enumerable: true });
 
        // `URLSearchParams.prototype[@@iterator]` method
-       redefine(URLSearchParamsPrototype, ITERATOR$8, URLSearchParamsPrototype.entries);
+       redefine(URLSearchParamsPrototype, ITERATOR, URLSearchParamsPrototype.entries);
 
        // `URLSearchParams.prototype.toString` method
        // https://url.spec.whatwg.org/#urlsearchparams-stringification-behavior
 
        // 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') {
+       if (!nativeUrl && typeof $fetch == 'function' && typeof Headers$1 == '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)) {
+               if (isObject$4(init)) {
                  body = init.body;
                  if (classof(body) === URL_SEARCH_PARAMS) {
-                   headers = init.headers ? new Headers(init.headers) : new Headers();
+                   headers = init.headers ? new Headers$1(init.headers) : new Headers$1();
                    if (!headers.has('content-type')) {
                      headers.set('content-type', 'application/x-www-form-urlencoded;charset=UTF-8');
                    }
                  }
                }
                args.push(init);
-             } return $fetch$1.apply(this, args);
+             } return $fetch.apply(this, args);
            }
          });
        }
 
 
 
-       var NativeURL = global_1.URL;
+       var NativeURL = global$2.URL;
        var URLSearchParams$1 = web_urlSearchParams.URLSearchParams;
        var getInternalSearchParamsState = web_urlSearchParams.getState;
-       var setInternalState$6 = internalState.set;
+       var setInternalState$1 = internalState.set;
        var getInternalURLState = internalState.getterFor('URL');
-       var floor$5 = Math.floor;
+       var floor$2 = Math.floor;
        var pow$1 = Math.pow;
 
        var INVALID_AUTHORITY = 'Invalid authority';
        var INVALID_PORT = 'Invalid port';
 
        var ALPHA = /[A-Za-z]/;
+       // eslint-disable-next-line regexp/no-obscure-range -- safe
        var ALPHANUMERIC = /[\d+-.A-Za-z]/;
        var DIGIT = /\d/;
-       var HEX_START = /^(0x|0X)/;
+       var HEX_START = /^0x/i;
        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
+       /* eslint-disable no-control-regex -- safe */
+       var FORBIDDEN_HOST_CODE_POINT = /[\0\t\n\r #%/:<>?@[\\\]^|]/;
+       var FORBIDDEN_HOST_CODE_POINT_EXCLUDING_PERCENT = /[\0\t\n\r #/:<>?@[\\\]^|]/;
        var LEADING_AND_TRAILING_C0_CONTROL_OR_SPACE = /^[\u0000-\u001F ]+|[\u0000-\u001F ]+$/g;
-       // eslint-disable-next-line no-control-regex
-       var TAB_AND_NEW_LINE = /[\u0009\u000A\u000D]/g;
+       var TAB_AND_NEW_LINE = /[\t\n\r]/g;
+       /* eslint-enable no-control-regex -- safe */
        var EOF;
 
        var parseHost = function (url, input) {
          return ipv4;
        };
 
-       // eslint-disable-next-line max-statements
+       // eslint-disable-next-line max-statements -- TODO
        var parseIPv6 = function (input) {
          var address = [0, 0, 0, 0, 0, 0, 0, 0];
          var pieceIndex = 0;
            result = [];
            for (index = 0; index < 4; index++) {
              result.unshift(host % 256);
-             host = floor$5(host / 256);
+             host = floor$2(host / 256);
            } return result.join('.');
          // ipv6
          } else if (typeof host == 'object') {
 
        var percentEncode = function (char, set) {
          var code = codeAt(char, 0);
-         return code > 0x20 && code < 0x7F && !has(set, char) ? char : encodeURIComponent(char);
+         return code > 0x20 && code < 0x7F && !has$1(set, char) ? char : encodeURIComponent(char);
        };
 
        var specialSchemes = {
        };
 
        var isSpecial = function (url) {
-         return has(specialSchemes, url.scheme);
+         return has$1(specialSchemes, url.scheme);
        };
 
        var includesCredentials = function (url) {
        var QUERY = {};
        var FRAGMENT = {};
 
-       // eslint-disable-next-line max-statements
+       // eslint-disable-next-line max-statements -- TODO
        var parseURL = function (url, input, stateOverride, base) {
          var state = stateOverride || SCHEME_START;
          var pointer = 0;
                  buffer += char.toLowerCase();
                } else if (char == ':') {
                  if (stateOverride && (
-                   (isSpecial(url) != has(specialSchemes, buffer)) ||
+                   (isSpecial(url) != has$1(specialSchemes, buffer)) ||
                    (buffer == 'file' && (includesCredentials(url) || url.port !== null)) ||
                    (url.scheme == 'file' && !url.host)
                  )) return;
          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 state = setInternalState$1(that, { type: 'URL' });
          var baseState, failure;
          if (base !== undefined) {
            if (base instanceof URLConstructor) baseState = getInternalURLState(base);
          var scheme = url.scheme;
          var port = url.port;
          if (scheme == 'blob') try {
-           return new URL(scheme.path[0]).origin;
+           return new URLConstructor(scheme.path[0]).origin;
          } catch (error) {
            return 'null';
          }
          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
+         // eslint-disable-next-line no-unused-vars -- required for `.length`
          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
+         // eslint-disable-next-line no-unused-vars -- required for `.length`
          if (nativeRevokeObjectURL) redefine(URLConstructor, 'revokeObjectURL', function revokeObjectURL(url) {
            return nativeRevokeObjectURL.apply(NativeURL, arguments);
          });
          URL: URLConstructor
        });
 
-       function _typeof(obj) {
-         "@babel/helpers - typeof";
+       // `RegExp.prototype.flags` getter implementation
+       // https://tc39.es/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;
+       };
 
-         if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") {
-           _typeof = function (obj) {
-             return typeof obj;
-           };
-         } else {
-           _typeof = function (obj) {
-             return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
-           };
-         }
+       var TO_STRING = 'toString';
+       var RegExpPrototype$2 = RegExp.prototype;
+       var nativeToString = RegExpPrototype$2[TO_STRING];
 
-         return _typeof(obj);
-       }
+       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;
 
-       function _classCallCheck(instance, Constructor) {
-         if (!(instance instanceof Constructor)) {
-           throw new TypeError("Cannot call a class as a function");
-         }
+       // `RegExp.prototype.toString` method
+       // https://tc39.es/ecma262/#sec-regexp.prototype.tostring
+       if (NOT_GENERIC || INCORRECT_NAME) {
+         redefine(RegExp.prototype, TO_STRING, 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$2) ? regexpFlags.call(R) : rf);
+           return '/' + p + '/' + f;
+         }, { unsafe: 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);
-         }
-       }
+       // babel-minify transpiles RegExp('a', 'y') -> /a/y and it causes SyntaxError,
+       var RE = function (s, f) {
+         return RegExp(s, f);
+       };
 
-       function _createClass(Constructor, protoProps, staticProps) {
-         if (protoProps) _defineProperties(Constructor.prototype, protoProps);
-         if (staticProps) _defineProperties(Constructor, staticProps);
-         return Constructor;
-       }
+       var UNSUPPORTED_Y$3 = fails(function () {
+         var re = RE('a', 'y');
+         re.lastIndex = 2;
+         return re.exec('abcd') != null;
+       });
 
-       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 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;
+       });
 
-         return obj;
-       }
+       var regexpStickyHelpers = {
+               UNSUPPORTED_Y: UNSUPPORTED_Y$3,
+               BROKEN_CARET: BROKEN_CARET
+       };
 
-       function _slicedToArray(arr, i) {
-         return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _unsupportedIterableToArray(arr, i) || _nonIterableRest();
-       }
+       var regexpUnsupportedDotAll = fails(function () {
+         // babel-minify transpiles RegExp('.', 's') -> /./s and it causes SyntaxError
+         var re = RegExp('.', (typeof '').charAt(0));
+         return !(re.dotAll && re.exec('\n') && re.flags === 's');
+       });
 
-       function _toConsumableArray(arr) {
-         return _arrayWithoutHoles(arr) || _iterableToArray(arr) || _unsupportedIterableToArray(arr) || _nonIterableSpread();
-       }
+       var regexpUnsupportedNcg = fails(function () {
+         // babel-minify transpiles RegExp('.', 'g') -> /./g and it causes SyntaxError
+         var re = RegExp('(?<a>b)', (typeof '').charAt(5));
+         return re.exec('b').groups.a !== 'b' ||
+           'b'.replace(re, '$<a>c') !== 'bc';
+       });
 
-       function _arrayWithoutHoles(arr) {
-         if (Array.isArray(arr)) return _arrayLikeToArray(arr);
-       }
+       /* eslint-disable regexp/no-assertion-capturing-group, regexp/no-empty-group, regexp/no-lazy-ends -- testing */
+       /* eslint-disable regexp/no-useless-quantifier -- testing */
 
-       function _arrayWithHoles(arr) {
-         if (Array.isArray(arr)) return arr;
-       }
 
-       function _iterableToArray(iter) {
-         if (typeof Symbol !== "undefined" && Symbol.iterator in Object(iter)) return Array.from(iter);
-       }
 
-       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;
 
-         try {
-           for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) {
-             _arr.push(_s.value);
+       var getInternalState = internalState.get;
 
-             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);
-       }
+       var nativeExec = RegExp.prototype.exec;
+       var nativeReplace = shared('native-string-replace', String.prototype.replace);
 
-       function _arrayLikeToArray(arr, len) {
-         if (len == null || len > arr.length) len = arr.length;
+       var patchedExec = nativeExec;
 
-         for (var i = 0, arr2 = new Array(len); i < len; i++) arr2[i] = arr[i];
+       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;
+       })();
 
-         return arr2;
-       }
+       var UNSUPPORTED_Y$2 = regexpStickyHelpers.UNSUPPORTED_Y || regexpStickyHelpers.BROKEN_CARET;
 
-       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.");
-       }
+       // nonparticipating capturing group, copied from es5-shim's String#split patch.
+       var NPCG_INCLUDED = /()??/.exec('')[1] !== undefined;
 
-       function _nonIterableRest() {
-         throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
-       }
+       var PATCH = UPDATES_LAST_INDEX_WRONG || NPCG_INCLUDED || UNSUPPORTED_Y$2 || regexpUnsupportedDotAll || regexpUnsupportedNcg;
 
-       function _createForOfIteratorHelper(o, allowArrayLike) {
-         var it;
+       if (PATCH) {
+         // eslint-disable-next-line max-statements -- TODO
+         patchedExec = function exec(str) {
+           var re = this;
+           var state = getInternalState(re);
+           var raw = state.raw;
+           var result, reCopy, lastIndex, match, i, object, group;
+
+           if (raw) {
+             raw.lastIndex = re.lastIndex;
+             result = patchedExec.call(raw, str);
+             re.lastIndex = raw.lastIndex;
+             return result;
+           }
 
-         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;
+           var groups = state.groups;
+           var sticky = UNSUPPORTED_Y$2 && re.sticky;
+           var flags = regexpFlags.call(re);
+           var source = re.source;
+           var charsAdded = 0;
+           var strCopy = str;
 
-             var F = function () {};
+           if (sticky) {
+             flags = flags.replace('y', '');
+             if (flags.indexOf('g') === -1) {
+               flags += 'g';
+             }
 
-             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
-             };
+             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);
            }
 
-           throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
-         }
+           if (NPCG_INCLUDED) {
+             reCopy = new RegExp('^' + source + '$(?!\\s)', flags);
+           }
+           if (UPDATES_LAST_INDEX_WRONG) lastIndex = re.lastIndex;
 
-         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;
+           match = nativeExec.call(sticky ? reCopy : re, strCopy);
+
+           if (sticky) {
+             if (match) {
+               match.input = match.input.slice(charsAdded);
+               match[0] = match[0].slice(charsAdded);
+               match.index = re.lastIndex;
+               re.lastIndex += match[0].length;
+             } else re.lastIndex = 0;
+           } else if (UPDATES_LAST_INDEX_WRONG && match) {
+             re.lastIndex = re.global ? match.index + match[0].length : lastIndex;
+           }
+           if (NPCG_INCLUDED && match && match.length > 1) {
+             // Fix browsers whose `exec` methods don't consistently return `undefined`
+             // for NPCG, like IE8. NOTE: This doesn' work for /(.?)?/
+             nativeReplace.call(match[0], reCopy, function () {
+               for (i = 1; i < arguments.length - 2; i++) {
+                 if (arguments[i] === undefined) match[i] = undefined;
+               }
+             });
+           }
+
+           if (match && groups) {
+             match.groups = object = objectCreate(null);
+             for (i = 0; i < groups.length; i++) {
+               group = groups[i];
+               object[group[0]] = match[group[1]];
              }
            }
+
+           return match;
          };
        }
 
-       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
-       };
+       var regexpExec = patchedExec;
 
-       function isDataView(obj) {
-         return obj && DataView.prototype.isPrototypeOf(obj);
-       }
+       // `RegExp.prototype.exec` method
+       // https://tc39.es/ecma262/#sec-regexp.prototype.exec
+       _export({ target: 'RegExp', proto: true, forced: /./.exec !== regexpExec }, {
+         exec: regexpExec
+       });
 
-       if (support.arrayBuffer) {
-         var viewClasses = ['[object Int8Array]', '[object Uint8Array]', '[object Uint8ClampedArray]', '[object Int16Array]', '[object Uint16Array]', '[object Int32Array]', '[object Uint32Array]', '[object Float32Array]', '[object Float64Array]'];
+       // TODO: Remove from `core-js@4` since it's moved to entry points
 
-         var isArrayBufferView = ArrayBuffer.isView || function (obj) {
-           return obj && viewClasses.indexOf(Object.prototype.toString.call(obj)) > -1;
-         };
-       }
 
-       function normalizeName(name) {
-         if (typeof name !== 'string') {
-           name = String(name);
-         }
 
-         if (/[^a-z0-9\-#$%&'*+.^_`|~!]/i.test(name) || name === '') {
-           throw new TypeError('Invalid character in header field name');
-         }
 
-         return name.toLowerCase();
-       }
 
-       function normalizeValue(value) {
-         if (typeof value !== 'string') {
-           value = String(value);
-         }
 
-         return value;
-       } // Build a destructive iterator for the value list
 
+       var SPECIES = wellKnownSymbol('species');
+       var RegExpPrototype$1 = RegExp.prototype;
 
-       function iteratorFor(items) {
-         var iterator = {
+       var fixRegexpWellKnownSymbolLogic = function (KEY, exec, FORCED, SHAM) {
+         var SYMBOL = wellKnownSymbol(KEY);
+
+         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 DELEGATES_TO_EXEC = DELEGATES_TO_SYMBOL && !fails(function () {
+           // Symbol-named RegExp methods call .exec
+           var execCalled = false;
+           var re = /a/;
+
+           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];
+           }
+
+           re.exec = function () { execCalled = true; return null; };
+
+           re[SYMBOL]('');
+           return !execCalled;
+         });
+
+         if (
+           !DELEGATES_TO_SYMBOL ||
+           !DELEGATES_TO_EXEC ||
+           FORCED
+         ) {
+           var nativeRegExpMethod = /./[SYMBOL];
+           var methods = exec(SYMBOL, ''[KEY], function (nativeMethod, regexp, str, arg2, forceStringMethod) {
+             var $exec = regexp.exec;
+             if ($exec === regexpExec || $exec === RegExpPrototype$1.exec) {
+               if (DELEGATES_TO_SYMBOL && !forceStringMethod) {
+                 // The native String method already delegates to @@method (this
+                 // polyfilled function), leasing to infinite recursion.
+                 // We avoid it by directly calling the native @@method method.
+                 return { done: true, value: nativeRegExpMethod.call(regexp, str, arg2) };
+               }
+               return { done: true, value: nativeMethod.call(str, regexp, arg2) };
+             }
+             return { done: false };
+           });
+
+           redefine(String.prototype, KEY, methods[0]);
+           redefine(RegExpPrototype$1, SYMBOL, methods[1]);
+         }
+
+         if (SHAM) createNonEnumerableProperty(RegExpPrototype$1[SYMBOL], 'sham', true);
+       };
+
+       var charAt = stringMultibyte.charAt;
+
+       // `AdvanceStringIndex` abstract operation
+       // https://tc39.es/ecma262/#sec-advancestringindex
+       var advanceStringIndex = function (S, index, unicode) {
+         return index + (unicode ? charAt(S, index).length : 1);
+       };
+
+       var floor$1 = Math.floor;
+       var replace = ''.replace;
+       var SUBSTITUTION_SYMBOLS = /\$([$&'`]|\d{1,2}|<[^>]*>)/g;
+       var SUBSTITUTION_SYMBOLS_NO_NAMED = /\$([$&'`]|\d{1,2})/g;
+
+       // `GetSubstitution` abstract operation
+       // https://tc39.es/ecma262/#sec-getsubstitution
+       var getSubstitution = function (matched, str, position, captures, namedCaptures, replacement) {
+         var tailPos = position + matched.length;
+         var m = captures.length;
+         var symbols = SUBSTITUTION_SYMBOLS_NO_NAMED;
+         if (namedCaptures !== undefined) {
+           namedCaptures = toObject(namedCaptures);
+           symbols = SUBSTITUTION_SYMBOLS;
+         }
+         return replace.call(replacement, symbols, function (match, ch) {
+           var capture;
+           switch (ch.charAt(0)) {
+             case '$': return '$';
+             case '&': return matched;
+             case '`': return str.slice(0, position);
+             case "'": return str.slice(tailPos);
+             case '<':
+               capture = namedCaptures[ch.slice(1, -1)];
+               break;
+             default: // \d\d?
+               var n = +ch;
+               if (n === 0) return match;
+               if (n > m) {
+                 var f = floor$1(n / 10);
+                 if (f === 0) return match;
+                 if (f <= m) return captures[f - 1] === undefined ? ch.charAt(1) : captures[f - 1] + ch.charAt(1);
+                 return match;
+               }
+               capture = captures[n - 1];
+           }
+           return capture === undefined ? '' : capture;
+         });
+       };
+
+       // `RegExpExec` abstract operation
+       // https://tc39.es/ecma262/#sec-regexpexec
+       var regexpExecAbstract = function (R, S) {
+         var exec = R.exec;
+         if (typeof exec === 'function') {
+           var result = exec.call(R, S);
+           if (typeof result !== 'object') {
+             throw TypeError('RegExp exec method returned something other than an Object or null');
+           }
+           return result;
+         }
+
+         if (classofRaw(R) !== 'RegExp') {
+           throw TypeError('RegExp#exec called on incompatible receiver');
+         }
+
+         return regexpExec.call(R, S);
+       };
+
+       var REPLACE = wellKnownSymbol('replace');
+       var max$2 = Math.max;
+       var min$5 = Math.min;
+
+       var maybeToString = function (it) {
+         return it === undefined ? it : String(it);
+       };
+
+       // IE <= 11 replaces $0 with the whole match, as if it was $&
+       // https://stackoverflow.com/questions/6024666/getting-ie-to-replace-a-regex-with-the-literal-string-0
+       var REPLACE_KEEPS_$0 = (function () {
+         // eslint-disable-next-line regexp/prefer-escape-replacement-dollar-char -- required for testing
+         return 'a'.replace(/./, '$0') === '$0';
+       })();
+
+       // Safari <= 13.0.3(?) substitutes nth capture where n>m with an empty string
+       var REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE = (function () {
+         if (/./[REPLACE]) {
+           return /./[REPLACE]('a', '$0') === '';
+         }
+         return false;
+       })();
+
+       var REPLACE_SUPPORTS_NAMED_GROUPS = !fails(function () {
+         var re = /./;
+         re.exec = function () {
+           var result = [];
+           result.groups = { a: '7' };
+           return result;
+         };
+         return ''.replace(re, '$<a>') !== '7';
+       });
+
+       // @@replace logic
+       fixRegexpWellKnownSymbolLogic('replace', function (_, nativeReplace, maybeCallNative) {
+         var UNSAFE_SUBSTITUTE = REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE ? '$' : '$0';
+
+         return [
+           // `String.prototype.replace` method
+           // https://tc39.es/ecma262/#sec-string.prototype.replace
+           function replace(searchValue, replaceValue) {
+             var O = requireObjectCoercible(this);
+             var replacer = searchValue == undefined ? undefined : searchValue[REPLACE];
+             return replacer !== undefined
+               ? replacer.call(searchValue, O, replaceValue)
+               : nativeReplace.call(String(O), searchValue, replaceValue);
+           },
+           // `RegExp.prototype[@@replace]` method
+           // https://tc39.es/ecma262/#sec-regexp.prototype-@@replace
+           function (string, replaceValue) {
+             if (
+               typeof replaceValue === 'string' &&
+               replaceValue.indexOf(UNSAFE_SUBSTITUTE) === -1 &&
+               replaceValue.indexOf('$<') === -1
+             ) {
+               var res = maybeCallNative(nativeReplace, this, string, replaceValue);
+               if (res.done) return res.value;
+             }
+
+             var rx = anObject(this);
+             var S = String(string);
+
+             var functionalReplace = typeof replaceValue === 'function';
+             if (!functionalReplace) replaceValue = String(replaceValue);
+
+             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;
+
+               results.push(result);
+               if (!global) break;
+
+               var matchStr = String(result[0]);
+               if (matchStr === '') rx.lastIndex = advanceStringIndex(S, toLength(rx.lastIndex), fullUnicode);
+             }
+
+             var accumulatedResult = '';
+             var nextSourcePosition = 0;
+             for (var i = 0; i < results.length; i++) {
+               result = results[i];
+
+               var matched = String(result[0]);
+               var position = max$2(min$5(toInteger(result.index), S.length), 0);
+               var captures = [];
+               // NOTE: This is equivalent to
+               //   captures = result.slice(1).map(maybeToString)
+               // but for some reason `nativeSlice.call(result, 1, result.length)` (called in
+               // the slice polyfill when slicing native arrays) "doesn't work" in safari 9 and
+               // causes a crash (https://pastebin.com/N21QzeQA) when trying to debug it.
+               for (var j = 1; j < result.length; j++) captures.push(maybeToString(result[j]));
+               var namedCaptures = result.groups;
+               if (functionalReplace) {
+                 var replacerArgs = [matched].concat(captures, position, S);
+                 if (namedCaptures !== undefined) replacerArgs.push(namedCaptures);
+                 var replacement = String(replaceValue.apply(undefined, replacerArgs));
+               } else {
+                 replacement = getSubstitution(matched, S, position, captures, namedCaptures, replaceValue);
+               }
+               if (position >= nextSourcePosition) {
+                 accumulatedResult += S.slice(nextSourcePosition, position) + replacement;
+                 nextSourcePosition = position + matched.length;
+               }
+             }
+             return accumulatedResult + S.slice(nextSourcePosition);
+           }
+         ];
+       }, !REPLACE_SUPPORTS_NAMED_GROUPS || !REPLACE_KEEPS_$0 || REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE);
+
+       var MATCH$2 = wellKnownSymbol('match');
+
+       // `IsRegExp` abstract operation
+       // https://tc39.es/ecma262/#sec-isregexp
+       var isRegexp = function (it) {
+         var isRegExp;
+         return isObject$4(it) && ((isRegExp = it[MATCH$2]) !== undefined ? !!isRegExp : classofRaw(it) == 'RegExp');
+       };
+
+       var UNSUPPORTED_Y$1 = regexpStickyHelpers.UNSUPPORTED_Y;
+       var arrayPush = [].push;
+       var min$4 = Math.min;
+       var MAX_UINT32 = 0xFFFFFFFF;
+
+       // Chrome 51 has a buggy "split" implementation when RegExp#exec !== nativeExec
+       // Weex JS has frozen built-in prototypes, so use try / catch wrapper
+       var SPLIT_WORKS_WITH_OVERWRITTEN_EXEC = !fails(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';
+       });
+
+       // @@split logic
+       fixRegexpWellKnownSymbolLogic('split', function (SPLIT, nativeSplit, maybeCallNative) {
+         var internalSplit;
+         if (
+           'abbc'.split(/(b)*/)[1] == 'c' ||
+           // eslint-disable-next-line regexp/no-empty-group -- required for testing
+           'test'.split(/(?:)/, -1).length != 4 ||
+           'ab'.split(/(?:ab)*/).length != 2 ||
+           '.'.split(/(.?)(.?)/).length != 4 ||
+           // eslint-disable-next-line regexp/no-assertion-capturing-group, regexp/no-empty-group -- required for testing
+           '.'.split(/()()/).length > 1 ||
+           ''.split(/.?/).length
+         ) {
+           // based on es5-shim implementation, need to rework it
+           internalSplit = function (separator, limit) {
+             var string = String(requireObjectCoercible(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;
+
+         return [
+           // `String.prototype.split` method
+           // https://tc39.es/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.es/ecma262/#sec-regexp.prototype-@@split
+           //
+           // NOTE: This cannot be properly polyfilled in engines that don't support
+           // the 'y' flag.
+           function (string, limit) {
+             var res = maybeCallNative(internalSplit, this, string, limit, internalSplit !== nativeSplit);
+             if (res.done) return res.value;
+
+             var rx = anObject(this);
+             var S = String(string);
+             var C = speciesConstructor(rx, RegExp);
+
+             var unicodeMatching = rx.unicode;
+             var flags = (rx.ignoreCase ? 'i' : '') +
+                         (rx.multiline ? 'm' : '') +
+                         (rx.unicode ? 'u' : '') +
+                         (UNSUPPORTED_Y$1 ? 'g' : 'y');
+
+             // ^(? + rx + ) is needed, in combination with some S slicing, to
+             // simulate the 'y' flag.
+             var splitter = new C(UNSUPPORTED_Y$1 ? '^(?:' + rx.source + ')' : rx, flags);
+             var lim = limit === undefined ? MAX_UINT32 : limit >>> 0;
+             if (lim === 0) return [];
+             if (S.length === 0) return regexpExecAbstract(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 = regexpExecAbstract(splitter, UNSUPPORTED_Y$1 ? S.slice(q) : S);
+               var e;
+               if (
+                 z === null ||
+                 (e = min$4(toLength(splitter.lastIndex + (UNSUPPORTED_Y$1 ? q : 0)), 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;
+           }
+         ];
+       }, !SPLIT_WORKS_WITH_OVERWRITTEN_EXEC, UNSUPPORTED_Y$1);
+
+       // a string of all valid unicode whitespaces
+       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 whitespace = '[' + whitespaces + ']';
+       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 = String(requireObjectCoercible($this));
+           if (TYPE & 1) string = string.replace(ltrim, '');
+           if (TYPE & 2) string = string.replace(rtrim$2, '');
+           return string;
+         };
+       };
+
+       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)
+       };
+
+       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(function () {
+           return !!whitespaces[METHOD_NAME]() || non[METHOD_NAME]() != non || whitespaces[METHOD_NAME].name !== METHOD_NAME;
+         });
+       };
+
+       var $trim = stringTrim.trim;
+
+
+       // `String.prototype.trim` method
+       // https://tc39.es/ecma262/#sec-string.prototype.trim
+       _export({ target: 'String', proto: true, forced: stringTrimForced('trim') }, {
+         trim: function trim() {
+           return $trim(this);
+         }
+       });
+
+       var defineProperty$3 = objectDefineProperty.f;
+
+       var FunctionPrototype = Function.prototype;
+       var FunctionPrototypeToString = FunctionPrototype.toString;
+       var nameRE = /^\s*function ([^ (]*)/;
+       var NAME = 'name';
+
+       // Function instances `.name` property
+       // https://tc39.es/ecma262/#sec-function-instances-name
+       if (descriptors && !(NAME in FunctionPrototype)) {
+         defineProperty$3(FunctionPrototype, NAME, {
+           configurable: true,
+           get: function () {
+             try {
+               return FunctionPrototypeToString.call(this).match(nameRE)[1];
+             } catch (error) {
+               return '';
+             }
+           }
+         });
+       }
+
+       // `Object.create` method
+       // https://tc39.es/ecma262/#sec-object.create
+       _export({ target: 'Object', stat: true, sham: !descriptors }, {
+         create: objectCreate
+       });
+
+       var slice$3 = [].slice;
+       var MSIE = /MSIE .\./.test(engineUserAgent); // <- dirty ie9- check
+
+       var wrap$1 = function (scheduler) {
+         return function (handler, timeout /* , ...arguments */) {
+           var boundArgs = arguments.length > 2;
+           var args = boundArgs ? slice$3.call(arguments, 2) : undefined;
+           return scheduler(boundArgs ? function () {
+             // eslint-disable-next-line no-new-func -- spec requirement
+             (typeof handler == 'function' ? handler : Function(handler)).apply(this, args);
+           } : handler, timeout);
+         };
+       };
+
+       // ie9- setTimeout & setInterval additional parameters fix
+       // https://html.spec.whatwg.org/multipage/timers-and-user-prompts.html#timers
+       _export({ 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$2.setTimeout),
+         // `setInterval` method
+         // https://html.spec.whatwg.org/multipage/timers-and-user-prompts.html#dom-setinterval
+         setInterval: wrap$1(global$2.setInterval)
+       });
+
+       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$1
+       };
+
+       function isDataView(obj) {
+         return obj && DataView.prototype.isPrototypeOf(obj);
+       }
+
+       if (support.arrayBuffer) {
+         var viewClasses = ['[object Int8Array]', '[object Uint8Array]', '[object Uint8ClampedArray]', '[object Int16Array]', '[object Uint16Array]', '[object Int32Array]', '[object Uint32Array]', '[object Float32Array]', '[object Float64Array]'];
+
+         var isArrayBufferView = ArrayBuffer.isView || function (obj) {
+           return obj && viewClasses.indexOf(Object.prototype.toString.call(obj)) > -1;
+         };
+       }
+
+       function normalizeName(name) {
+         if (typeof name !== 'string') {
+           name = String(name);
+         }
+
+         if (/[^a-z0-9\-#$%&'*+.^_`|~!]/i.test(name) || name === '') {
+           throw new TypeError('Invalid character in header field name: "' + name + '"');
+         }
+
+         return name.toLowerCase();
+       }
+
+       function normalizeValue(value) {
+         if (typeof value !== 'string') {
+           value = String(value);
+         }
+
+         return value;
+       } // Build a destructive iterator for the value list
+
+
+       function iteratorFor(items) {
+         var iterator = {
            next: function next() {
              var value = items.shift();
              return {
          return iterator;
        }
 
-       function Headers$1(headers) {
+       function Headers(headers) {
          this.map = {};
 
-         if (headers instanceof Headers$1) {
+         if (headers instanceof Headers) {
            headers.forEach(function (value, name) {
              this.append(name, value);
            }, this);
          }
        }
 
-       Headers$1.prototype.append = function (name, value) {
+       Headers.prototype.append = function (name, value) {
          name = normalizeName(name);
          value = normalizeValue(value);
          var oldValue = this.map[name];
          this.map[name] = oldValue ? oldValue + ', ' + value : value;
        };
 
-       Headers$1.prototype['delete'] = function (name) {
+       Headers.prototype['delete'] = function (name) {
          delete this.map[normalizeName(name)];
        };
 
-       Headers$1.prototype.get = function (name) {
+       Headers.prototype.get = function (name) {
          name = normalizeName(name);
          return this.has(name) ? this.map[name] : null;
        };
 
-       Headers$1.prototype.has = function (name) {
+       Headers.prototype.has = function (name) {
          return this.map.hasOwnProperty(normalizeName(name));
        };
 
-       Headers$1.prototype.set = function (name, value) {
+       Headers.prototype.set = function (name, value) {
          this.map[normalizeName(name)] = normalizeValue(value);
        };
 
-       Headers$1.prototype.forEach = function (callback, thisArg) {
+       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$1.prototype.keys = function () {
+       Headers.prototype.keys = function () {
          var items = [];
          this.forEach(function (value, name) {
            items.push(name);
          return iteratorFor(items);
        };
 
-       Headers$1.prototype.values = function () {
+       Headers.prototype.values = function () {
          var items = [];
          this.forEach(function (value) {
            items.push(value);
          return iteratorFor(items);
        };
 
-       Headers$1.prototype.entries = function () {
+       Headers.prototype.entries = function () {
          var items = [];
          this.forEach(function (value, name) {
            items.push([name, value]);
        };
 
        if (support.iterable) {
-         Headers$1.prototype[Symbol.iterator] = Headers$1.prototype.entries;
+         Headers.prototype[Symbol.iterator] = Headers.prototype.entries;
        }
 
        function consumed(body) {
            this.credentials = input.credentials;
 
            if (!options.headers) {
-             this.headers = new Headers$1(input.headers);
+             this.headers = new Headers(input.headers);
            }
 
            this.method = input.method;
          this.credentials = options.credentials || this.credentials || 'same-origin';
 
          if (options.headers || !this.headers) {
-           this.headers = new Headers$1(options.headers);
+           this.headers = new Headers(options.headers);
          }
 
          this.method = normalizeMethod(options.method || this.method || 'GET');
        }
 
        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
+         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
          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.statusText = options.statusText === undefined ? '' : '' + options.statusText;
+         this.headers = new Headers(options.headers);
          this.url = options.url || '';
 
          this._initBody(bodyInit);
          return new Response(this._bodyInit, {
            status: this.status,
            statusText: this.statusText,
-           headers: new Headers$1(this.headers),
+           headers: new Headers(this.headers),
            url: this.url
          });
        };
              }
            }
 
-           if (init && _typeof(init.headers) === 'object' && !(init.headers instanceof Headers$1)) {
+           if (init && _typeof(init.headers) === 'object' && !(init.headers instanceof Headers)) {
              Object.getOwnPropertyNames(init.headers).forEach(function (name) {
                xhr.setRequestHeader(name, normalizeValue(init.headers[name]));
              });
 
        if (!global$1.fetch) {
          global$1.fetch = fetch$1;
-         global$1.Headers = Headers$1;
+         global$1.Headers = Headers;
          global$1.Request = Request;
          global$1.Response = Response;
        }
 
-       // `Symbol.toStringTag` well-known symbol
-       // https://tc39.github.io/ecma262/#sec-symbol.tostringtag
-       defineWellKnownSymbol('toStringTag');
-
-       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';
-
-       // `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;
-         }
-       });
-
-       // JSON[@@toStringTag] property
-       // https://tc39.github.io/ecma262/#sec-json-@@tostringtag
-       setToStringTag(global_1.JSON, 'JSON', true);
-
-       // Math[@@toStringTag] property
-       // https://tc39.github.io/ecma262/#sec-math-@@tostringtag
-       setToStringTag(Math, 'Math', true);
-
        // `Object.defineProperty` method
-       // https://tc39.github.io/ecma262/#sec-object.defineproperty
+       // https://tc39.es/ecma262/#sec-object.defineproperty
        _export({ target: 'Object', stat: true, forced: !descriptors, sham: !descriptors }, {
          defineProperty: objectDefineProperty.f
        });
 
-       var nativeGetOwnPropertyDescriptor$2 = objectGetOwnPropertyDescriptor.f;
-
-
-       var FAILS_ON_PRIMITIVES$1 = fails(function () { nativeGetOwnPropertyDescriptor$2(1); });
-       var FORCED$5 = !descriptors || FAILS_ON_PRIMITIVES$1;
-
-       // `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);
-         }
+       // `Object.setPrototypeOf` method
+       // https://tc39.es/ecma262/#sec-object.setprototypeof
+       _export({ target: 'Object', stat: true }, {
+         setPrototypeOf: objectSetPrototypeOf
        });
 
-       var FAILS_ON_PRIMITIVES$2 = fails(function () { objectGetPrototypeOf(1); });
+       var FAILS_ON_PRIMITIVES$3 = fails(function () { objectGetPrototypeOf(1); });
 
        // `Object.getPrototypeOf` method
-       // https://tc39.github.io/ecma262/#sec-object.getprototypeof
-       _export({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES$2, sham: !correctPrototypeGetter }, {
+       // https://tc39.es/ecma262/#sec-object.getprototypeof
+       _export({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES$3, sham: !correctPrototypeGetter }, {
          getPrototypeOf: function getPrototypeOf(it) {
            return objectGetPrototypeOf(toObject(it));
          }
        });
 
-       // `Object.setPrototypeOf` method
-       // https://tc39.github.io/ecma262/#sec-object.setprototypeof
-       _export({ target: 'Object', stat: true }, {
-         setPrototypeOf: objectSetPrototypeOf
-       });
-
-       var slice$1 = [].slice;
+       var slice$2 = [].slice;
        var factories = {};
 
        var construct = function (C, argsLength, args) {
          if (!(argsLength in factories)) {
            for (var list = [], i = 0; i < argsLength; i++) list[i] = 'a[' + i + ']';
-           // eslint-disable-next-line no-new-func
+           // eslint-disable-next-line no-new-func -- we have no proper alternatives, IE8- only
            factories[argsLength] = Function('C,a', 'return new C(' + list.join(',') + ')');
          } return factories[argsLength](C, args);
        };
 
        // `Function.prototype.bind` method implementation
-       // https://tc39.github.io/ecma262/#sec-function.prototype.bind
+       // https://tc39.es/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 fn = aFunction(this);
+         var partArgs = slice$2.call(arguments, 1);
          var boundFunction = function bound(/* args... */) {
-           var args = partArgs.concat(slice$1.call(arguments));
+           var args = partArgs.concat(slice$2.call(arguments));
            return this instanceof boundFunction ? construct(fn, args.length, args) : fn.apply(that, args);
          };
-         if (isObject(fn.prototype)) boundFunction.prototype = fn.prototype;
+         if (isObject$4(fn.prototype)) boundFunction.prototype = fn.prototype;
          return boundFunction;
        };
 
        var nativeConstruct = getBuiltIn('Reflect', 'construct');
 
        // `Reflect.construct` method
-       // https://tc39.github.io/ecma262/#sec-reflect.construct
+       // 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(function () {
        var ARGS_BUG = !fails(function () {
          nativeConstruct(function () { /* empty */ });
        });
-       var FORCED$6 = NEW_TARGET_BUG || ARGS_BUG;
+       var FORCED$a = NEW_TARGET_BUG || ARGS_BUG;
 
-       _export({ target: 'Reflect', stat: true, forced: FORCED$6, sham: FORCED$6 }, {
+       _export({ target: 'Reflect', stat: true, forced: FORCED$a, sham: FORCED$a }, {
          construct: function construct(Target, args /* , newTarget */) {
-           aFunction$1(Target);
+           aFunction(Target);
            anObject(args);
-           var newTarget = arguments.length < 3 ? Target : aFunction$1(arguments[2]);
+           var newTarget = arguments.length < 3 ? Target : aFunction(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
            }
            // with altered newTarget, not support built-in constructors
            var proto = newTarget.prototype;
-           var instance = objectCreate(isObject(proto) ? proto : Object.prototype);
+           var instance = objectCreate(isObject$4(proto) ? proto : Object.prototype);
            var result = Function.apply.call(Target, instance, args);
-           return isObject(result) ? result : instance;
+           return isObject$4(result) ? result : instance;
          }
        });
 
        // `Reflect.get` method
-       // https://tc39.github.io/ecma262/#sec-reflect.get
-       function get$2(target, propertyKey /* , receiver */) {
+       // 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(target) === receiver) return target[propertyKey];
-         if (descriptor = objectGetOwnPropertyDescriptor.f(target, propertyKey)) return has(descriptor, 'value')
+         if (descriptor = objectGetOwnPropertyDescriptor.f(target, propertyKey)) return has$1(descriptor, 'value')
            ? descriptor.value
            : descriptor.get === undefined
              ? undefined
              : descriptor.get.call(receiver);
-         if (isObject(prototype = objectGetPrototypeOf(target))) return get$2(prototype, propertyKey, receiver);
+         if (isObject$4(prototype = objectGetPrototypeOf(target))) return get$3(prototype, propertyKey, receiver);
        }
 
        _export({ target: 'Reflect', stat: true }, {
-         get: get$2
+         get: get$3
+       });
+
+       var nativeGetOwnPropertyDescriptor = objectGetOwnPropertyDescriptor.f;
+
+
+       var FAILS_ON_PRIMITIVES$2 = fails(function () { nativeGetOwnPropertyDescriptor(1); });
+       var FORCED$9 = !descriptors || FAILS_ON_PRIMITIVES$2;
+
+       // `Object.getOwnPropertyDescriptor` method
+       // https://tc39.es/ecma262/#sec-object.getownpropertydescriptor
+       _export({ target: 'Object', stat: true, forced: FORCED$9, sham: !descriptors }, {
+         getOwnPropertyDescriptor: function getOwnPropertyDescriptor(it, key) {
+           return nativeGetOwnPropertyDescriptor(toIndexedObject(it), key);
+         }
+       });
+
+       var HAS_SPECIES_SUPPORT$1 = arrayMethodHasSpeciesSupport('splice');
+
+       var max$1 = Math.max;
+       var min$3 = Math.min;
+       var MAX_SAFE_INTEGER$1 = 0x1FFFFFFFFFFFFF;
+       var MAXIMUM_ALLOWED_LENGTH_EXCEEDED = 'Maximum allowed length exceeded';
+
+       // `Array.prototype.splice` method
+       // https://tc39.es/ecma262/#sec-array.prototype.splice
+       // with adding support of @@species
+       _export({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT$1 }, {
+         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$3(max$1(toInteger(deleteCount), 0), len - actualStart);
+           }
+           if (len + insertCount - actualDeleteCount > MAX_SAFE_INTEGER$1) {
+             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;
+         }
        });
 
+       // `Symbol.toStringTag` well-known symbol
+       // https://tc39.es/ecma262/#sec-symbol.tostringtag
+       defineWellKnownSymbol('toStringTag');
+
+       // JSON[@@toStringTag] property
+       // https://tc39.es/ecma262/#sec-json-@@tostringtag
+       setToStringTag(global$2.JSON, 'JSON', true);
+
+       // Math[@@toStringTag] property
+       // https://tc39.es/ecma262/#sec-math-@@tostringtag
+       setToStringTag(Math, 'Math', true);
+
        (function (factory) {
-          factory();
+         factory();
        })(function () {
 
          function _classCallCheck(instance, Constructor) {
            if (typeof Proxy === "function") return true;
 
            try {
-             Date.prototype.toString.call(Reflect.construct(Date, [], function () {}));
+             Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {}));
              return true;
            } catch (e) {
              return false;
 
            _createClass(Emitter, [{
              key: "addEventListener",
-             value: function addEventListener(type, callback) {
+             value: function addEventListener(type, callback, options) {
                if (!(type in this.listeners)) {
                  this.listeners[type] = [];
                }
 
-               this.listeners[type].push(callback);
+               this.listeners[type].push({
+                 callback: callback,
+                 options: options
+               });
              }
            }, {
              key: "removeEventListener",
                var stack = this.listeners[type];
 
                for (var i = 0, l = stack.length; i < l; i++) {
-                 if (stack[i] === callback) {
+                 if (stack[i].callback === callback) {
                    stack.splice(i, 1);
                    return;
                  }
            }, {
              key: "dispatchEvent",
              value: function dispatchEvent(event) {
-               var _this = this;
-
                if (!(event.type in this.listeners)) {
                  return;
                }
 
-               var debounce = function debounce(callback) {
-                 setTimeout(function () {
-                   return callback.call(_this, event);
-                 });
-               };
-
                var stack = this.listeners[event.type];
+               var stackToCall = stack.slice();
 
-               for (var i = 0, l = stack.length; i < l; i++) {
-                 debounce(stack[i]);
+               for (var i = 0, l = stackToCall.length; i < l; i++) {
+                 var listener = stackToCall[i];
+
+                 try {
+                   listener.callback.call(this, event);
+                 } catch (e) {
+                   Promise.resolve().then(function () {
+                     throw e;
+                   });
+                 }
+
+                 if (listener.options && listener.options.once) {
+                   this.removeEventListener(event.type, listener.callback);
+                 }
                }
 
                return !event.defaultPrevented;
            var _super = _createSuper(AbortSignal);
 
            function AbortSignal() {
-             var _this2;
+             var _this;
 
              _classCallCheck(this, AbortSignal);
 
-             _this2 = _super.call(this); // Some versions of babel does not transpile super() correctly for IE <= 10, if the parent
+             _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
 
-             if (!_this2.listeners) {
-               Emitter.call(_assertThisInitialized(_this2));
+             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
 
 
-             Object.defineProperty(_assertThisInitialized(_this2), 'aborted', {
+             Object.defineProperty(_assertThisInitialized(_this), 'aborted', {
                value: false,
                writable: true,
                configurable: true
              });
-             Object.defineProperty(_assertThisInitialized(_this2), 'onabort', {
+             Object.defineProperty(_assertThisInitialized(_this), 'onabort', {
                value: null,
                writable: true,
                configurable: true
              });
-             return _this2;
+             return _this;
            }
 
            _createClass(AbortSignal, [{
        }
 
        var IS_CONCAT_SPREADABLE = wellKnownSymbol('isConcatSpreadable');
-       var MAX_SAFE_INTEGER$1 = 0x1FFFFFFFFFFFFF;
+       var MAX_SAFE_INTEGER = 0x1FFFFFFFFFFFFF;
        var MAXIMUM_ALLOWED_INDEX_EXCEEDED = 'Maximum allowed index exceeded';
 
        // We can't use this feature detection in V8 since it causes
        var SPECIES_SUPPORT = arrayMethodHasSpeciesSupport('concat');
 
        var isConcatSpreadable = function (O) {
-         if (!isObject(O)) return false;
+         if (!isObject$4(O)) return false;
          var spreadable = O[IS_CONCAT_SPREADABLE];
          return spreadable !== undefined ? !!spreadable : isArray(O);
        };
 
-       var FORCED$7 = !IS_CONCAT_SPREADABLE_SUPPORT || !SPECIES_SUPPORT;
+       var FORCED$8 = !IS_CONCAT_SPREADABLE_SUPPORT || !SPECIES_SUPPORT;
 
        // `Array.prototype.concat` method
-       // https://tc39.github.io/ecma262/#sec-array.prototype.concat
+       // https://tc39.es/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
+       _export({ target: 'Array', proto: true, forced: FORCED$8 }, {
+         // eslint-disable-next-line no-unused-vars -- required for `.length`
+         concat: function concat(arg) {
            var O = toObject(this);
            var A = arraySpeciesCreate(O, 0);
            var n = 0;
              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);
+               if (n + len > MAX_SAFE_INTEGER) throw TypeError(MAXIMUM_ALLOWED_INDEX_EXCEEDED);
                for (k = 0; k < len; k++, n++) if (k in E) createProperty(A, n, E[k]);
              } else {
-               if (n >= MAX_SAFE_INTEGER$1) throw TypeError(MAXIMUM_ALLOWED_INDEX_EXCEEDED);
+               if (n >= MAX_SAFE_INTEGER) throw TypeError(MAXIMUM_ALLOWED_INDEX_EXCEEDED);
                createProperty(A, n++, E);
              }
            }
        });
 
        // `Object.assign` method
-       // https://tc39.github.io/ecma262/#sec-object.assign
+       // https://tc39.es/ecma262/#sec-object.assign
+       // eslint-disable-next-line es/no-object-assign -- required for testing
        _export({ target: 'Object', stat: true, forced: Object.assign !== objectAssign }, {
          assign: objectAssign
        });
 
-       var $filter$1 = arrayIteration.filter;
-
+       var $filter = arrayIteration.filter;
 
 
-       var HAS_SPECIES_SUPPORT$3 = arrayMethodHasSpeciesSupport('filter');
-       // Edge 14- issue
-       var USES_TO_LENGTH$6 = arrayMethodUsesToLength('filter');
+       var HAS_SPECIES_SUPPORT = arrayMethodHasSpeciesSupport('filter');
 
        // `Array.prototype.filter` method
-       // https://tc39.github.io/ecma262/#sec-array.prototype.filter
+       // https://tc39.es/ecma262/#sec-array.prototype.filter
        // with adding support of @@species
-       _export({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT$3 || !USES_TO_LENGTH$6 }, {
+       _export({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT }, {
          filter: function filter(callbackfn /* , thisArg */) {
-           return $filter$1(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+           return $filter(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+         }
+       });
+
+       var FAILS_ON_PRIMITIVES$1 = fails(function () { objectKeys(1); });
+
+       // `Object.keys` method
+       // https://tc39.es/ecma262/#sec-object.keys
+       _export({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES$1 }, {
+         keys: function keys(it) {
+           return objectKeys(toObject(it));
          }
        });
 
        var test$1 = [1, 2];
 
        // `Array.prototype.reverse` method
-       // https://tc39.github.io/ecma262/#sec-array.prototype.reverse
+       // https://tc39.es/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
+           // eslint-disable-next-line no-self-assign -- dirty hack
            if (isArray(this)) this.length = this.length;
            return nativeReverse.call(this);
          }
        });
 
-       var FAILS_ON_PRIMITIVES$3 = fails(function () { objectKeys(1); });
-
-       // `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;
+       var trim$4 = stringTrim.trim;
 
 
-       var $parseFloat = global_1.parseFloat;
-       var FORCED$8 = 1 / $parseFloat(whitespaces + '-0') !== -Infinity;
+       var $parseFloat = global$2.parseFloat;
+       var FORCED$7 = 1 / $parseFloat(whitespaces + '-0') !== -Infinity;
 
        // `parseFloat` method
-       // https://tc39.github.io/ecma262/#sec-parsefloat-string
-       var numberParseFloat = FORCED$8 ? function parseFloat(string) {
-         var trimmedString = trim(String(string));
+       // https://tc39.es/ecma262/#sec-parsefloat-string
+       var numberParseFloat = FORCED$7 ? function parseFloat(string) {
+         var trimmedString = trim$4(String(string));
          var result = $parseFloat(trimmedString);
          return result === 0 && trimmedString.charAt(0) == '-' ? -0 : result;
        } : $parseFloat;
 
        // `parseFloat` method
-       // https://tc39.github.io/ecma262/#sec-parsefloat-string
+       // https://tc39.es/ecma262/#sec-parsefloat-string
        _export({ global: true, forced: parseFloat != numberParseFloat }, {
          parseFloat: numberParseFloat
        });
          tidal_channel: true
        };
 
-       var trim$1 = stringTrim.trim;
+       var trim$3 = stringTrim.trim;
 
 
-       var $parseInt = global_1.parseInt;
-       var hex$1 = /^[+-]?0[Xx]/;
-       var FORCED$9 = $parseInt(whitespaces + '08') !== 8 || $parseInt(whitespaces + '0x16') !== 22;
+       var $parseInt = global$2.parseInt;
+       var hex$2 = /^[+-]?0[Xx]/;
+       var FORCED$6 = $parseInt(whitespaces + '08') !== 8 || $parseInt(whitespaces + '0x16') !== 22;
 
        // `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));
+       // https://tc39.es/ecma262/#sec-parseint-string-radix
+       var numberParseInt = FORCED$6 ? function parseInt(string, radix) {
+         var S = trim$3(String(string));
+         return $parseInt(S, (radix >>> 0) || (hex$2.test(S) ? 16 : 10));
        } : $parseInt;
 
        // `parseInt` method
-       // https://tc39.github.io/ecma262/#sec-parseint-string-radix
+       // https://tc39.es/ecma262/#sec-parseint-string-radix
        _export({ global: true, forced: parseInt != numberParseInt }, {
          parseInt: numberParseInt
        });
 
        var freezing = !fails(function () {
+         // eslint-disable-next-line es/no-object-isextensible, es/no-object-preventextensions -- required for testing
          return Object.isExtensible(Object.preventExtensions({}));
        });
 
        var METADATA = uid('meta');
        var id = 0;
 
+       // eslint-disable-next-line es/no-object-isextensible -- safe
        var isExtensible = Object.isExtensible || function () {
          return true;
        };
 
        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)) {
+         if (!isObject$4(it)) return typeof it == 'symbol' ? it : (typeof it == 'string' ? 'S' : 'P') + it;
+         if (!has$1(it, METADATA)) {
            // can't set metadata to uncaught frozen object
            if (!isExtensible(it)) return 'F';
            // not necessary to add metadata
        };
 
        var getWeakData = function (it, create) {
-         if (!has(it, METADATA)) {
+         if (!has$1(it, METADATA)) {
            // can't set metadata to uncaught frozen object
            if (!isExtensible(it)) return true;
            // not necessary to add metadata
 
        // add metadata on freeze-family methods calling
        var onFreeze = function (it) {
-         if (freezing && meta.REQUIRED && isExtensible(it) && !has(it, METADATA)) setMetadata(it);
+         if (freezing && meta.REQUIRED && isExtensible(it) && !has$1(it, METADATA)) setMetadata(it);
          return it;
        };
 
          onFreeze: onFreeze
        };
 
-       hiddenKeys[METADATA] = true;
+       hiddenKeys$1[METADATA] = true;
        });
 
        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 NativeConstructor = global$2[CONSTRUCTOR_NAME];
          var NativePrototype = NativeConstructor && NativeConstructor.prototype;
          var Constructor = NativeConstructor;
          var exported = {};
                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);
+               return IS_WEAK && !isObject$4(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);
+               return IS_WEAK && !isObject$4(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);
+               return IS_WEAK && !isObject$4(key) ? false : nativeMethod.call(this, key === 0 ? 0 : key);
              } : function set(key, value) {
                nativeMethod.call(this, key === 0 ? 0 : key, value);
                return this;
            );
          };
 
-         // eslint-disable-next-line max-len
-         if (isForced_1(CONSTRUCTOR_NAME, typeof NativeConstructor != 'function' || !(IS_WEAK || NativePrototype.forEach && !fails(function () {
-           new NativeConstructor().entries().next();
-         })))) {
+         var REPLACE = isForced_1(
+           CONSTRUCTOR_NAME,
+           typeof NativeConstructor != 'function' || !(IS_WEAK || NativePrototype.forEach && !fails(function () {
+             new NativeConstructor().entries().next();
+           }))
+         );
+
+         if (REPLACE) {
            // create collection constructor
            Constructor = common.getConstructor(wrapper, CONSTRUCTOR_NAME, IS_MAP, ADDER);
            internalMetadata.REQUIRED = true;
            // 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
+           // eslint-disable-next-line no-new -- required for testing
            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 () {
          return Constructor;
        };
 
-       var defineProperty$8 = objectDefineProperty.f;
+       var defineProperty$2 = objectDefineProperty.f;
 
 
 
        var fastKey = internalMetadata.fastKey;
 
 
-       var setInternalState$7 = internalState.set;
+       var setInternalState = internalState.set;
        var internalStateGetterFor = internalState.getterFor;
 
        var collectionStrong = {
          getConstructor: function (wrapper, CONSTRUCTOR_NAME, IS_MAP, ADDER) {
            var C = wrapper(function (that, iterable) {
              anInstance(that, C, CONSTRUCTOR_NAME);
-             setInternalState$7(that, {
+             setInternalState(that, {
                type: CONSTRUCTOR_NAME,
                index: objectCreate(null),
                first: undefined,
            };
 
            redefineAll(C.prototype, {
-             // 23.1.3.1 Map.prototype.clear()
-             // 23.2.3.2 Set.prototype.clear()
+             // `{ 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);
                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)
+             // `{ 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);
                  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)
+             // `{ 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 = functionBindContext(callbackfn, arguments.length > 1 ? arguments[1] : undefined, 3);
                  while (entry && entry.removed) entry = entry.previous;
                }
              },
-             // 23.1.3.7 Map.prototype.has(key)
-             // 23.2.3.7 Set.prototype.has(value)
+             // `{ Map, Set}.prototype.has(key)` methods
+             // https://tc39.es/ecma262/#sec-map.prototype.has
+             // https://tc39.es/ecma262/#sec-set.prototype.has
              has: function has(key) {
                return !!getEntry(this, key);
              }
            });
 
            redefineAll(C.prototype, IS_MAP ? {
-             // 23.1.3.6 Map.prototype.get(key)
+             // `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;
              },
-             // 23.1.3.9 Map.prototype.set(key, 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);
              }
            } : {
-             // 23.2.3.1 Set.prototype.add(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) defineProperty$8(C.prototype, 'size', {
+           if (descriptors) defineProperty$2(C.prototype, 'size', {
              get: function () {
                return getInternalState(this).size;
              }
            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
+           // `{ Map, Set }.prototype.{ keys, values, entries, @@iterator }()` methods
+           // https://tc39.es/ecma262/#sec-map.prototype.entries
+           // https://tc39.es/ecma262/#sec-map.prototype.keys
+           // https://tc39.es/ecma262/#sec-map.prototype.values
+           // https://tc39.es/ecma262/#sec-map.prototype-@@iterator
+           // https://tc39.es/ecma262/#sec-set.prototype.entries
+           // https://tc39.es/ecma262/#sec-set.prototype.keys
+           // https://tc39.es/ecma262/#sec-set.prototype.values
+           // https://tc39.es/ecma262/#sec-set.prototype-@@iterator
            defineIterator(C, CONSTRUCTOR_NAME, function (iterated, kind) {
-             setInternalState$7(this, {
+             setInternalState(this, {
                type: ITERATOR_NAME,
                target: iterated,
                state: getInternalCollectionState(iterated),
              return { value: [entry.key, entry.value], done: false };
            }, IS_MAP ? 'entries' : 'values', !IS_MAP, true);
 
-           // add [@@species], 23.1.2.2, 23.2.2.2
+           // `{ Map, Set }.prototype[@@species]` accessors
+           // https://tc39.es/ecma262/#sec-get-map-@@species
+           // https://tc39.es/ecma262/#sec-get-set-@@species
            setSpecies(CONSTRUCTOR_NAME);
          }
        };
 
        // `Set` constructor
-       // https://tc39.github.io/ecma262/#sec-set-objects
-       var es_set = collection('Set', function (init) {
+       // https://tc39.es/ecma262/#sec-set-objects
+       collection('Set', function (init) {
          return function Set() { return init(this, arguments.length ? arguments[0] : undefined); };
        }, collectionStrong);
 
        }
 
        // `Symbol.asyncIterator` well-known symbol
-       // https://tc39.github.io/ecma262/#sec-symbol.asynciterator
+       // https://tc39.es/ecma262/#sec-symbol.asynciterator
        defineWellKnownSymbol('asyncIterator');
 
-       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.
-          */
+       createCommonjsModule(function (module) {
          var runtime = function (exports) {
 
            var Op = Object.prototype;
          // 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 );
+         module.exports );
 
          try {
            regeneratorRuntime = runtime;
          }
        });
 
-       var _marked = /*#__PURE__*/regeneratorRuntime.mark(numbers);
+       var _marked$3 = /*#__PURE__*/regeneratorRuntime.mark(numbers);
 
-       function number (x) {
+       function number$1 (x) {
          return x === null ? NaN : +x;
        }
        function numbers(values, valueof) {
                  return _context.stop();
              }
            }
-         }, _marked, null, [[2, 13, 16, 19], [23, 34, 37, 40]]);
+         }, _marked$3, null, [[2, 13, 16, 19], [23, 34, 37, 40]]);
        }
 
        var ascendingBisect = d3_bisector(d3_ascending);
        var bisectRight = ascendingBisect.right;
-       var bisectCenter = d3_bisector(number).center;
+       d3_bisector(number$1).center;
 
-       // `Array.prototype.fill` method
-       // https://tc39.github.io/ecma262/#sec-array.prototype.fill
-       _export({ target: 'Array', proto: true }, {
-         fill: arrayFill
-       });
-
-       // https://tc39.github.io/ecma262/#sec-array.prototype-@@unscopables
-       addToUnscopables('fill');
-
-       var INCORRECT_ITERATION$1 = !checkCorrectnessOfIteration(function (iterable) {
+       var INCORRECT_ITERATION = !checkCorrectnessOfIteration(function (iterable) {
+         // eslint-disable-next-line es/no-array-from -- required for testing
          Array.from(iterable);
        });
 
        // `Array.from` method
-       // https://tc39.github.io/ecma262/#sec-array.from
-       _export({ target: 'Array', stat: true, forced: INCORRECT_ITERATION$1 }, {
+       // https://tc39.es/ecma262/#sec-array.from
+       _export({ target: 'Array', stat: true, forced: INCORRECT_ITERATION }, {
          from: arrayFrom
        });
 
-       var $some$1 = arrayIteration.some;
+       // `Array.prototype.fill` method
+       // https://tc39.es/ecma262/#sec-array.prototype.fill
+       _export({ target: 'Array', proto: true }, {
+         fill: arrayFill
+       });
+
+       // https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
+       addToUnscopables('fill');
 
+       var $some = arrayIteration.some;
 
 
-       var STRICT_METHOD$4 = arrayMethodIsStrict('some');
-       var USES_TO_LENGTH$7 = arrayMethodUsesToLength('some');
+       var STRICT_METHOD$3 = arrayMethodIsStrict('some');
 
        // `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 }, {
+       // https://tc39.es/ecma262/#sec-array.prototype.some
+       _export({ target: 'Array', proto: true, forced: !STRICT_METHOD$3 }, {
          some: function some(callbackfn /* , thisArg */) {
-           return $some$1(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+           return $some(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
          }
        });
 
+       var exportTypedArrayStaticMethod = arrayBufferViewCore.exportTypedArrayStaticMethod;
+
+
+       // `%TypedArray%.from` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.from
+       exportTypedArrayStaticMethod('from', typedArrayFrom, typedArrayConstructorsRequireWrappers);
+
        // `Float64Array` constructor
-       // https://tc39.github.io/ecma262/#sec-typedarray-objects
+       // https://tc39.es/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;
-
-
-       // `%TypedArray%.from` method
-       // https://tc39.github.io/ecma262/#sec-%typedarray%.from
-       exportTypedArrayStaticMethod$1('from', typedArrayFrom, typedArrayConstructorsRequireWrappers);
-
        function d3_descending (a, b) {
          return b < a ? -1 : b > a ? 1 : b >= a ? 0 : NaN;
        }
        // https://github.com/python/cpython/blob/a74eea238f5baba15797e2e8b570d153bc8690a7/Modules/mathmodule.c#L1423
        var Adder = /*#__PURE__*/function () {
          function Adder() {
-           _classCallCheck(this, Adder);
+           _classCallCheck$1(this, Adder);
 
            this._partials = new Float64Array(32);
            this._n = 0;
          }
 
-         _createClass(Adder, [{
+         _createClass$1(Adder, [{
            key: "add",
            value: function add(x) {
              var p = this._partials;
          return Adder;
        }();
 
+       // `Object.defineProperties` method
+       // https://tc39.es/ecma262/#sec-object.defineproperties
+       _export({ target: 'Object', stat: true, forced: !descriptors, sham: !descriptors }, {
+         defineProperties: objectDefineProperties
+       });
+
        // `Map` constructor
-       // https://tc39.github.io/ecma262/#sec-map-objects
-       var es_map = collection('Map', function (init) {
+       // https://tc39.es/ecma262/#sec-map-objects
+       collection('Map', function (init) {
          return function Map() { return init(this, arguments.length ? arguments[0] : undefined); };
        }, collectionStrong);
 
+       var test = [];
+       var nativeSort = test.sort;
+
+       // IE8-
+       var FAILS_ON_UNDEFINED = fails(function () {
+         test.sort(undefined);
+       });
+       // V8 bug
+       var FAILS_ON_NULL = fails(function () {
+         test.sort(null);
+       });
+       // Old WebKit
+       var STRICT_METHOD$2 = arrayMethodIsStrict('sort');
+
+       var STABLE_SORT = !fails(function () {
+         // feature detection can be too slow, so check engines versions
+         if (engineV8Version) return engineV8Version < 70;
+         if (engineFfVersion && engineFfVersion > 3) return;
+         if (engineIsIeOrEdge) return true;
+         if (engineWebkitVersion) return engineWebkitVersion < 603;
+
+         var result = '';
+         var code, chr, value, index;
+
+         // generate an array with more 512 elements (Chakra and old V8 fails only in this case)
+         for (code = 65; code < 76; code++) {
+           chr = String.fromCharCode(code);
+
+           switch (code) {
+             case 66: case 69: case 70: case 72: value = 3; break;
+             case 68: case 71: value = 4; break;
+             default: value = 2;
+           }
+
+           for (index = 0; index < 47; index++) {
+             test.push({ k: chr + index, v: value });
+           }
+         }
+
+         test.sort(function (a, b) { return b.v - a.v; });
+
+         for (index = 0; index < test.length; index++) {
+           chr = test[index].k.charAt(0);
+           if (result.charAt(result.length - 1) !== chr) result += chr;
+         }
+
+         return result !== 'DGBEFHACIJK';
+       });
+
+       var FORCED$5 = FAILS_ON_UNDEFINED || !FAILS_ON_NULL || !STRICT_METHOD$2 || !STABLE_SORT;
+
+       var getSortCompare = function (comparefn) {
+         return function (x, y) {
+           if (y === undefined) return -1;
+           if (x === undefined) return 1;
+           if (comparefn !== undefined) return +comparefn(x, y) || 0;
+           return String(x) > String(y) ? 1 : -1;
+         };
+       };
+
+       // `Array.prototype.sort` method
+       // https://tc39.es/ecma262/#sec-array.prototype.sort
+       _export({ target: 'Array', proto: true, forced: FORCED$5 }, {
+         sort: function sort(comparefn) {
+           if (comparefn !== undefined) aFunction(comparefn);
+
+           var array = toObject(this);
+
+           if (STABLE_SORT) return comparefn === undefined ? nativeSort.call(array) : nativeSort.call(array, comparefn);
+
+           var items = [];
+           var arrayLength = toLength(array.length);
+           var itemsLength, index;
+
+           for (index = 0; index < arrayLength; index++) {
+             if (index in array) items.push(array[index]);
+           }
+
+           items = arraySort(items, getSortCompare(comparefn));
+           itemsLength = items.length;
+           index = 0;
+
+           while (index < itemsLength) array[index] = items[index++];
+           while (index < arrayLength) delete array[index++];
+
+           return array;
+         }
+       });
+
        var e10 = Math.sqrt(50),
            e5 = Math.sqrt(10),
            e2 = Math.sqrt(2);
          if ((step = tickIncrement(start, stop, count)) === 0 || !isFinite(step)) return [];
 
          if (step > 0) {
-           start = Math.ceil(start / step);
-           stop = Math.floor(stop / step);
-           ticks = new Array(n = Math.ceil(stop - start + 1));
+           var r0 = Math.round(start / step),
+               r1 = Math.round(stop / step);
+           if (r0 * step < start) ++r0;
+           if (r1 * step > stop) --r1;
+           ticks = new Array(n = r1 - r0 + 1);
 
            while (++i < n) {
-             ticks[i] = (start + i) * step;
+             ticks[i] = (r0 + i) * step;
            }
          } else {
            step = -step;
-           start = Math.ceil(start * step);
-           stop = Math.floor(stop * step);
-           ticks = new Array(n = Math.ceil(stop - start + 1));
+
+           var _r = Math.round(start * step),
+               _r2 = Math.round(stop * step);
+
+           if (_r / step < start) ++_r;
+           if (_r2 / step > stop) --_r2;
+           ticks = new Array(n = _r2 - _r + 1);
 
            while (++i < n) {
-             ticks[i] = (start + i) / step;
+             ticks[i] = (_r + i) / step;
            }
          }
 
          return stop < start ? -step1 : step1;
        }
 
-       function max$4(values, valueof) {
+       function max(values, valueof) {
          var max;
 
          if (valueof === undefined) {
          return max;
        }
 
-       function min$7(values, valueof) {
+       function min$2(values, valueof) {
          var min;
 
          if (valueof === undefined) {
 
        // ISC license, Copyright 2018 Vladimir Agafonkin.
 
-       function quickselect(array, k) {
+       function quickselect$2(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;
              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);
+             quickselect$2(array, k, newLeft, newRight, compare);
            }
 
            var t = array[k];
            var i = left;
            var j = right;
-           swap(array, left, k);
-           if (compare(array[right], t) > 0) swap(array, left, right);
+           swap$1(array, left, k);
+           if (compare(array[right], t) > 0) swap$1(array, left, right);
 
            while (i < j) {
-             swap(array, i, j), ++i, --j;
+             swap$1(array, i, j), ++i, --j;
 
              while (compare(array[i], t) < 0) {
                ++i;
              }
            }
 
-           if (compare(array[left], t) === 0) swap(array, left, j);else ++j, swap(array, j, right);
+           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;
          }
          return array;
        }
 
-       function swap(array, i, j) {
+       function swap$1(array, i, j) {
          var t = array[i];
          array[i] = array[j];
          array[j] = t;
        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);
+         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$4(quickselect(values, i0).subarray(0, i0 + 1)),
-             value1 = min$7(values.subarray(i0 + 1));
+             value0 = max(quickselect$2(values, i0).subarray(0, i0 + 1)),
+             value1 = min$2(values.subarray(i0 + 1));
          return value0 + (value1 - value0) * (i - i0);
        }
 
          return quantile(values, 0.5, valueof);
        }
 
-       var _marked$1 = /*#__PURE__*/regeneratorRuntime.mark(flatten);
+       var _marked$2 = /*#__PURE__*/regeneratorRuntime.mark(flatten);
 
        function flatten(arrays) {
          var _iterator, _step, array;
                  return _context.stop();
              }
            }
-         }, _marked$1, null, [[1, 10, 13, 16]]);
+         }, _marked$2, null, [[1, 10, 13, 16]]);
        }
 
-       function merge(arrays) {
+       function merge$4(arrays) {
          return Array.from(flatten(arrays));
        }
 
-       function range (start, stop, step) {
+       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,
          return range;
        }
 
-       var test$2 = [];
-       var nativeSort = test$2.sort;
-
-       // 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$5 = arrayMethodIsStrict('sort');
-
-       var FORCED$a = FAILS_ON_UNDEFINED || !FAILS_ON_NULL || !STRICT_METHOD$5;
-
-       // `Array.prototype.sort` method
-       // https://tc39.github.io/ecma262/#sec-array.prototype.sort
-       _export({ target: 'Array', proto: true, forced: FORCED$a }, {
-         sort: function sort(comparefn) {
-           return comparefn === undefined
-             ? nativeSort.call(toObject(this))
-             : nativeSort.call(toObject(this), aFunction$1(comparefn));
-         }
-       });
-
        // `SameValue` abstract operation
-       // https://tc39.github.io/ecma262/#sec-samevalue
+       // https://tc39.es/ecma262/#sec-samevalue
+       // eslint-disable-next-line es/no-object-is -- safe
        var sameValue = Object.is || function is(x, y) {
-         // eslint-disable-next-line no-self-compare
+         // eslint-disable-next-line no-self-compare -- NaN check
          return x === y ? x !== 0 || 1 / x === 1 / y : x != x && y != y;
        };
 
+       // eslint-disable-next-line es/no-math-hypot -- required for testing
        var $hypot = Math.hypot;
-       var abs$1 = Math.abs;
-       var sqrt = Math.sqrt;
+       var abs$3 = Math.abs;
+       var sqrt$1 = Math.sqrt;
 
        // Chrome 77 bug
        // https://bugs.chromium.org/p/v8/issues/detail?id=9546
        var BUGGY = !!$hypot && $hypot(Infinity, NaN) !== Infinity;
 
        // `Math.hypot` method
-       // https://tc39.github.io/ecma262/#sec-math.hypot
+       // https://tc39.es/ecma262/#sec-math.hypot
        _export({ target: 'Math', stat: true, forced: BUGGY }, {
-         hypot: function hypot(value1, value2) { // eslint-disable-line no-unused-vars
+         // 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$1(arguments[i++]);
+             arg = abs$3(arguments[i++]);
              if (larg < arg) {
                div = larg / arg;
                sum = sum * div * div + 1;
                sum += div * div;
              } else sum += arg;
            }
-           return larg === Infinity ? Infinity : larg * sqrt(sum);
+           return larg === Infinity ? Infinity : larg * sqrt$1(sum);
          }
        });
 
        // `Math.sign` method implementation
-       // https://tc39.github.io/ecma262/#sec-math.sign
+       // 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
+         // eslint-disable-next-line no-self-compare -- NaN check
          return (x = +x) == 0 || x != x ? x : x < 0 ? -1 : 1;
        };
 
        // `Math.sign` method
-       // https://tc39.github.io/ecma262/#sec-math.sign
+       // https://tc39.es/ecma262/#sec-math.sign
        _export({ target: 'Math', stat: true }, {
          sign: mathSign
        });
 
-       var epsilon = 1e-6;
-       var epsilon2 = 1e-12;
+       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 = 180 / pi;
+       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 = Math.exp;
-       var hypot = Math.hypot;
+       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$1 = Math.sqrt;
+       var sqrt = Math.sqrt;
        var tan = Math.tan;
        function acos(x) {
          return x > 1 ? 0 : x < -1 ? pi : Math.acos(x);
          return x > 1 ? halfPi : x < -1 ? -halfPi : Math.asin(x);
        }
 
-       function noop() {}
+       function noop$1() {}
 
        function streamGeometry(geometry, stream) {
          if (geometry && streamGeometryType.hasOwnProperty(geometry.type)) {
          }
        }
 
-       var areaRingSum = new Adder(); // hello?
+       var areaRingSum$1 = new Adder(); // hello?
 
-       var areaSum = new Adder(),
-           lambda00,
-           phi00,
-           lambda0,
-           cosPhi0,
-           sinPhi0;
-       var areaStream = {
-         point: noop,
-         lineStart: noop,
-         lineEnd: noop,
+       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 = new Adder();
-           areaStream.lineStart = areaRingStart;
-           areaStream.lineEnd = areaRingEnd;
+           areaRingSum$1 = new Adder();
+           areaStream$1.lineStart = areaRingStart$1;
+           areaStream$1.lineEnd = areaRingEnd$1;
          },
          polygonEnd: function polygonEnd() {
-           var areaRing = +areaRingSum;
-           areaSum.add(areaRing < 0 ? tau + areaRing : areaRing);
-           this.lineStart = this.lineEnd = this.point = noop;
+           var areaRing = +areaRingSum$1;
+           areaSum$1.add(areaRing < 0 ? tau + areaRing : areaRing);
+           this.lineStart = this.lineEnd = this.point = noop$1;
          },
          sphere: function sphere() {
-           areaSum.add(tau);
+           areaSum$1.add(tau);
          }
        };
 
-       function areaRingStart() {
-         areaStream.point = areaPointFirst;
+       function areaRingStart$1() {
+         areaStream$1.point = areaPointFirst$1;
        }
 
-       function areaRingEnd() {
-         areaPoint(lambda00, phi00);
+       function areaRingEnd$1() {
+         areaPoint$1(lambda00$1, phi00$1);
        }
 
-       function areaPointFirst(lambda, phi) {
-         areaStream.point = areaPoint;
-         lambda00 = lambda, phi00 = phi;
+       function areaPointFirst$1(lambda, phi) {
+         areaStream$1.point = areaPoint$1;
+         lambda00$1 = lambda, phi00$1 = phi;
          lambda *= radians, phi *= radians;
-         lambda0 = lambda, cosPhi0 = cos(phi = phi / 2 + quarterPi), sinPhi0 = sin(phi);
+         lambda0$2 = lambda, cosPhi0$1 = cos(phi = phi / 2 + quarterPi), sinPhi0$1 = sin(phi);
        }
 
-       function areaPoint(lambda, phi) {
+       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 dLambda = lambda - lambda0,
+         var dLambda = lambda - lambda0$2,
              sdLambda = dLambda >= 0 ? 1 : -1,
              adLambda = sdLambda * dLambda,
              cosPhi = cos(phi),
              sinPhi = sin(phi),
-             k = sinPhi0 * sinPhi,
-             u = cosPhi0 * cosPhi + k * cos(adLambda),
+             k = sinPhi0$1 * sinPhi,
+             u = cosPhi0$1 * cosPhi + k * cos(adLambda),
              v = k * sdLambda * sin(adLambda);
-         areaRingSum.add(atan2(v, u)); // Advance the previous points.
+         areaRingSum$1.add(atan2(v, u)); // Advance the previous points.
 
-         lambda0 = lambda, cosPhi0 = cosPhi, sinPhi0 = sinPhi;
+         lambda0$2 = lambda, cosPhi0$1 = cosPhi, sinPhi0$1 = sinPhi;
        }
 
        function d3_geoArea (object) {
-         areaSum = new Adder();
-         d3_geoStream(object, areaStream);
-         return areaSum * 2;
+         areaSum$1 = new Adder();
+         d3_geoStream(object, areaStream$1);
+         return areaSum$1 * 2;
        }
 
        function spherical(cartesian) {
        } // TODO return d
 
        function cartesianNormalizeInPlace(d) {
-         var l = sqrt$1(d[0] * d[0] + d[1] * d[1] + d[2] * d[2]);
+         var l = sqrt(d[0] * d[0] + d[1] * d[1] + d[2] * d[2]);
          d[0] /= l, d[1] /= l, d[2] /= l;
        }
 
        var lambda0$1, phi0, lambda1, phi1, // bounds
        lambda2, // previous lambda-coordinate
-       lambda00$1, phi00$1, // first point
+       lambda00, phi00, // first point
        p0, // previous 3D point
-       deltaSum, ranges, range$1;
-       var boundsStream = {
-         point: boundsPoint,
+       deltaSum, ranges, range;
+       var boundsStream$1 = {
+         point: boundsPoint$1,
          lineStart: boundsLineStart,
          lineEnd: boundsLineEnd,
          polygonStart: function polygonStart() {
-           boundsStream.point = boundsRingPoint;
-           boundsStream.lineStart = boundsRingStart;
-           boundsStream.lineEnd = boundsRingEnd;
+           boundsStream$1.point = boundsRingPoint;
+           boundsStream$1.lineStart = boundsRingStart;
+           boundsStream$1.lineEnd = boundsRingEnd;
            deltaSum = new Adder();
-           areaStream.polygonStart();
+           areaStream$1.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;
+           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);
          }
        };
 
-       function boundsPoint(lambda, phi) {
-         ranges.push(range$1 = [lambda0$1 = lambda, lambda1 = lambda]);
+       function boundsPoint$1(lambda, phi) {
+         ranges.push(range = [lambda0$1 = lambda, lambda1 = lambda]);
          if (phi < phi0) phi0 = phi;
          if (phi > phi1) phi1 = phi;
        }
            inflection = spherical(inflection);
            var delta = lambda - lambda2,
                sign = delta > 0 ? 1 : -1,
-               lambdai = inflection[0] * degrees * sign,
+               lambdai = inflection[0] * degrees$1 * sign,
                phii,
                antimeridian = abs$2(delta) > 180;
 
            if (antimeridian ^ (sign * lambda2 < lambdai && lambdai < sign * lambda)) {
-             phii = inflection[1] * degrees;
+             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;
+             phii = -inflection[1] * degrees$1;
              if (phii < phi0) phi0 = phii;
            } else {
              if (phi < phi0) phi0 = phi;
              }
            }
          } else {
-           ranges.push(range$1 = [lambda0$1 = lambda, lambda1 = lambda]);
+           ranges.push(range = [lambda0$1 = lambda, lambda1 = lambda]);
          }
 
          if (phi < phi0) phi0 = phi;
        }
 
        function boundsLineStart() {
-         boundsStream.point = linePoint;
+         boundsStream$1.point = linePoint;
        }
 
        function boundsLineEnd() {
-         range$1[0] = lambda0$1, range$1[1] = lambda1;
-         boundsStream.point = boundsPoint;
+         range[0] = lambda0$1, range[1] = lambda1;
+         boundsStream$1.point = boundsPoint$1;
          p0 = null;
        }
 
            var delta = lambda - lambda2;
            deltaSum.add(abs$2(delta) > 180 ? delta + (delta > 0 ? 360 : -360) : delta);
          } else {
-           lambda00$1 = lambda, phi00$1 = phi;
+           lambda00 = lambda, phi00 = phi;
          }
 
-         areaStream.point(lambda, phi);
+         areaStream$1.point(lambda, phi);
          linePoint(lambda, phi);
        }
 
        function boundsRingStart() {
-         areaStream.lineStart();
+         areaStream$1.lineStart();
        }
 
        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;
+         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
          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.
+         d3_geoStream(feature, boundsStream$1); // First, sort ranges by their minimum longitudes.
 
          if (n = ranges.length) {
            ranges.sort(rangeCompare); // Then, merge any ranges that overlap.
            }
          }
 
-         ranges = range$1 = null;
+         ranges = range = null;
          return lambda0$1 === Infinity || phi0 === Infinity ? [[NaN, NaN], [NaN, NaN]] : [[lambda0$1, phi0], [lambda1, phi1]];
        }
 
-       var W0, W1, X0, Y0, Z0, X1, Y1, Z1, X2, Y2, Z2, lambda00$2, phi00$2, // first point
-       x0, y0, z0; // previous point
-
-       var centroidStream = {
-         sphere: noop,
-         point: centroidPoint,
-         lineStart: centroidLineStart,
-         lineEnd: centroidLineEnd,
-         polygonStart: function polygonStart() {
-           centroidStream.lineStart = centroidRingStart;
-           centroidStream.lineEnd = centroidRingEnd;
-         },
-         polygonEnd: function polygonEnd() {
-           centroidStream.lineStart = centroidLineStart;
-           centroidStream.lineEnd = centroidLineEnd;
-         }
-       }; // 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 centroidLineStart() {
-         centroidStream.point = centroidLinePointFirst;
-       }
-
-       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 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 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;
-       }
-
-       function centroidRingEnd() {
-         centroidRingPoint(lambda00$2, phi00$2);
-         centroidStream.point = centroidPoint;
-       }
-
-       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 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 compose (a, b) {
          function compose(x, y) {
            return x = a(x, y), b(x[0], x[1]);
 
          function forward(coordinates) {
            coordinates = rotate(coordinates[0] * radians, coordinates[1] * radians);
-           return coordinates[0] *= degrees, coordinates[1] *= degrees, coordinates;
+           return coordinates[0] *= degrees$1, coordinates[1] *= degrees$1, coordinates;
          }
 
          forward.invert = function (coordinates) {
            coordinates = rotate.invert(coordinates[0] * radians, coordinates[1] * radians);
-           return coordinates[0] *= degrees, coordinates[1] *= degrees, coordinates;
+           return coordinates[0] *= degrees$1, coordinates[1] *= degrees$1, coordinates;
          };
 
          return forward;
          point = cartesian(point), point[0] -= cosRadius;
          cartesianNormalizeInPlace(point);
          var radius = acos(-point[1]);
-         return ((-point[2] < 0 ? -radius : radius) + tau - epsilon) % tau;
+         return ((-point[2] < 0 ? -radius : radius) + tau - epsilon$1) % tau;
        }
 
        function clipBuffer () {
            lineStart: function lineStart() {
              lines.push(line = []);
            },
-           lineEnd: noop,
+           lineEnd: noop$1,
            rejoin: function rejoin() {
              if (lines.length > 1) lines.push(lines.pop().concat(lines.shift()));
            },
        }
 
        function pointEqual (a, b) {
-         return abs$2(a[0] - b[0]) < epsilon && abs$2(a[1] - b[1]) < epsilon;
+         return abs$2(a[0] - b[0]) < epsilon$1 && abs$2(a[1] - b[1]) < epsilon$1;
        }
 
        function Intersection(point, points, other, entry) {
              } // handle degenerate cases by moving the point
 
 
-             p1[0] += 2 * epsilon;
+             p1[0] += 2 * epsilon$1;
            }
 
            subject.push(x = new Intersection(p0, segment, null, true));
              angle = 0,
              winding = 0;
          var sum = new Adder();
-         if (sinPhi === 1) phi = halfPi + epsilon;else if (sinPhi === -1) phi = -halfPi - epsilon;
+         if (sinPhi === 1) phi = halfPi + epsilon$1;else if (sinPhi === -1) phi = -halfPi - epsilon$1;
 
          for (var i = 0, n = polygon.length; i < n; ++i) {
            if (!(m = (ring = polygon[i]).length)) continue;
          // same side as the South pole.
 
 
-         return (angle < -epsilon || angle < epsilon && sum < -epsilon2) ^ winding & 1;
+         return (angle < -epsilon$1 || angle < epsilon$1 && sum < -epsilon2$1) ^ winding & 1;
        }
 
        function clip (pointVisible, clipLine, interpolate, start) {
                clip.point = point;
                clip.lineStart = lineStart;
                clip.lineEnd = lineEnd;
-               segments = merge(segments);
+               segments = merge$4(segments);
                var startInside = polygonContains(polygon, start);
 
                if (segments.length) {
 
 
        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]);
+         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 clipAntimeridian = clip(function () {
              var sign1 = lambda1 > 0 ? pi : -pi,
                  delta = abs$2(lambda1 - lambda0);
 
-             if (abs$2(delta - pi) < epsilon) {
+             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);
                _clean = 0;
              } else if (sign0 !== sign1 && delta >= pi) {
                // line crosses antimeridian
-               if (abs$2(lambda0 - sign0) < epsilon) lambda0 -= sign0 * epsilon; // handle degeneracies
+               if (abs$2(lambda0 - sign0) < epsilon$1) lambda0 -= sign0 * epsilon$1; // handle degeneracies
 
-               if (abs$2(lambda1 - sign1) < epsilon) lambda1 -= sign1 * epsilon;
+               if (abs$2(lambda1 - sign1) < epsilon$1) lambda1 -= sign1 * epsilon$1;
                phi0 = clipAntimeridianIntersect(lambda0, phi0, lambda1, phi1);
                stream.point(sign0, phi0);
                stream.lineEnd();
          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;
+         return abs$2(sinLambda0Lambda1) > epsilon$1 ? atan((sin(phi0) * (cosPhi1 = cos(phi1)) * sin(lambda1) - sin(phi1) * (cosPhi0 = cos(phi0)) * sin(lambda0)) / (cosPhi0 * cosPhi1 * sinLambda0Lambda1)) : (phi0 + phi1) / 2;
        }
 
        function clipAntimeridianInterpolate(from, to, direction, stream) {
            stream.point(-pi, -phi);
            stream.point(-pi, 0);
            stream.point(-pi, phi);
-         } else if (abs$2(from[0] - to[0]) > epsilon) {
+         } 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);
          var cr = cos(radius),
              delta = 6 * radians,
              smallRadius = cr > 0,
-             notHemisphere = abs$2(cr) > epsilon; // TODO optimise for this common case
+             notHemisphere = abs$2(cr) > epsilon$1; // TODO optimise for this common case
 
          function interpolate(from, to, direction, stream) {
            circleStream(stream, radius, delta, direction, from, to);
                uu = cartesianDot(u, u),
                t2 = w * w - uu * (cartesianDot(A, A) - 1);
            if (t2 < 0) return;
-           var t = sqrt$1(t2),
+           var t = sqrt(t2),
                q = cartesianScale(u, (-w - t) / uu);
            cartesianAddInPlace(q, A);
            q = spherical(q);
                z;
            if (lambda1 < lambda0) z = lambda0, lambda0 = lambda1, lambda1 = z;
            var delta = lambda1 - lambda0,
-               polar = abs$2(delta - pi) < epsilon,
-               meridian = polar || delta < epsilon;
+               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 ? phi0 : phi1) : phi0 <= q[1] && q[1] <= phi1 : delta > pi ^ (lambda0 <= q[0] && q[0] <= lambda1)) {
+           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)];
          }
 
          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
+           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
          }
 
          function compareIntersection(a, b) {
            function polygonEnd() {
              var startInside = polygonInside(),
                  cleanInside = clean && startInside,
-                 visible = (segments = merge(segments)).length;
+                 visible = (segments = merge$4(segments)).length;
 
              if (cleanInside || visible) {
                stream.polygonStart();
          };
        }
 
-       var lengthSum, lambda0$2, sinPhi0$1, cosPhi0$1;
-       var lengthStream = {
-         sphere: noop,
-         point: noop,
+       var lengthSum$1, lambda0, sinPhi0, cosPhi0;
+       var lengthStream$1 = {
+         sphere: noop$1,
+         point: noop$1,
          lineStart: lengthLineStart,
-         lineEnd: noop,
-         polygonStart: noop,
-         polygonEnd: noop
+         lineEnd: noop$1,
+         polygonStart: noop$1,
+         polygonEnd: noop$1
        };
 
        function lengthLineStart() {
-         lengthStream.point = lengthPointFirst;
-         lengthStream.lineEnd = lengthLineEnd;
+         lengthStream$1.point = lengthPointFirst$1;
+         lengthStream$1.lineEnd = lengthLineEnd;
        }
 
        function lengthLineEnd() {
-         lengthStream.point = lengthStream.lineEnd = noop;
+         lengthStream$1.point = lengthStream$1.lineEnd = noop$1;
        }
 
-       function lengthPointFirst(lambda, phi) {
+       function lengthPointFirst$1(lambda, phi) {
          lambda *= radians, phi *= radians;
-         lambda0$2 = lambda, sinPhi0$1 = sin(phi), cosPhi0$1 = cos(phi);
-         lengthStream.point = lengthPoint;
+         lambda0 = lambda, sinPhi0 = sin(phi), cosPhi0 = cos(phi);
+         lengthStream$1.point = lengthPoint$1;
        }
 
-       function lengthPoint(lambda, phi) {
+       function lengthPoint$1(lambda, phi) {
          lambda *= radians, phi *= radians;
          var sinPhi = sin(phi),
              cosPhi = cos(phi),
-             delta = abs$2(lambda - lambda0$2),
+             delta = abs$2(lambda - lambda0),
              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;
+             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 d3_geoLength (object) {
-         lengthSum = new Adder();
-         d3_geoStream(object, lengthStream);
-         return +lengthSum;
+         lengthSum$1 = new Adder();
+         d3_geoStream(object, lengthStream$1);
+         return +lengthSum$1;
        }
 
-       var identity = (function (x) {
+       var identity$4 = (function (x) {
          return x;
        });
 
-       var areaSum$1 = new Adder(),
-           areaRingSum$1 = new Adder(),
-           x00,
-           y00,
-           x0$1,
-           y0$1;
-       var areaStream$1 = {
-         point: noop,
-         lineStart: noop,
-         lineEnd: noop,
+       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$1.lineStart = areaRingStart$1;
-           areaStream$1.lineEnd = areaRingEnd$1;
+           areaStream.lineStart = areaRingStart;
+           areaStream.lineEnd = areaRingEnd;
          },
          polygonEnd: function polygonEnd() {
-           areaStream$1.lineStart = areaStream$1.lineEnd = areaStream$1.point = noop;
-           areaSum$1.add(abs$2(areaRingSum$1));
-           areaRingSum$1 = new Adder();
+           areaStream.lineStart = areaStream.lineEnd = areaStream.point = noop$1;
+           areaSum.add(abs$2(areaRingSum));
+           areaRingSum = new Adder();
          },
          result: function result() {
-           var area = areaSum$1 / 2;
-           areaSum$1 = new Adder();
+           var area = areaSum / 2;
+           areaSum = new Adder();
            return area;
          }
        };
 
-       function areaRingStart$1() {
-         areaStream$1.point = areaPointFirst$1;
+       function areaRingStart() {
+         areaStream.point = areaPointFirst;
        }
 
-       function areaPointFirst$1(x, y) {
-         areaStream$1.point = areaPoint$1;
-         x00 = x0$1 = x, y00 = y0$1 = y;
+       function areaPointFirst(x, y) {
+         areaStream.point = areaPoint;
+         x00$2 = x0$3 = x, y00$2 = y0$3 = y;
        }
 
-       function areaPoint$1(x, y) {
-         areaRingSum$1.add(y0$1 * x - x0$1 * y);
-         x0$1 = x, y0$1 = y;
+       function areaPoint(x, y) {
+         areaRingSum.add(y0$3 * x - x0$3 * y);
+         x0$3 = x, y0$3 = y;
        }
 
-       function areaRingEnd$1() {
-         areaPoint$1(x00, y00);
+       function areaRingEnd() {
+         areaPoint(x00$2, y00$2);
        }
 
        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,
+       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);
          }
        };
 
-       function boundsPoint$1(x, y) {
+       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 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,
+       var X0 = 0,
+           Y0 = 0,
+           Z0 = 0,
+           X1 = 0,
+           Y1 = 0,
+           Z1 = 0,
+           X2 = 0,
+           Y2 = 0,
+           Z2 = 0,
            x00$1,
            y00$1,
-           x0$3,
-           y0$3;
-       var centroidStream$1 = {
-         point: centroidPoint$1,
-         lineStart: centroidLineStart$1,
-         lineEnd: centroidLineEnd$1,
+           x0$1,
+           y0$1;
+       var centroidStream = {
+         point: centroidPoint,
+         lineStart: centroidLineStart,
+         lineEnd: centroidLineEnd,
          polygonStart: function polygonStart() {
-           centroidStream$1.lineStart = centroidRingStart$1;
-           centroidStream$1.lineEnd = centroidRingEnd$1;
+           centroidStream.lineStart = centroidRingStart;
+           centroidStream.lineEnd = centroidRingEnd;
          },
          polygonEnd: function polygonEnd() {
-           centroidStream$1.point = centroidPoint$1;
-           centroidStream$1.lineStart = centroidLineStart$1;
-           centroidStream$1.lineEnd = centroidLineEnd$1;
+           centroidStream.point = centroidPoint;
+           centroidStream.lineStart = centroidLineStart;
+           centroidStream.lineEnd = centroidLineEnd;
          },
          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;
+           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;
          }
        };
 
-       function centroidPoint$1(x, y) {
-         X0$1 += x;
-         Y0$1 += y;
-         ++Z0$1;
+       function centroidPoint(x, y) {
+         X0 += x;
+         Y0 += y;
+         ++Z0;
        }
 
-       function centroidLineStart$1() {
-         centroidStream$1.point = centroidPointFirstLine;
+       function centroidLineStart() {
+         centroidStream.point = centroidPointFirstLine;
        }
 
        function centroidPointFirstLine(x, y) {
-         centroidStream$1.point = centroidPointLine;
-         centroidPoint$1(x0$3 = x, y0$3 = y);
+         centroidStream.point = centroidPointLine;
+         centroidPoint(x0$1 = x, y0$1 = y);
        }
 
        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);
+         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$1() {
-         centroidStream$1.point = centroidPoint$1;
+       function centroidLineEnd() {
+         centroidStream.point = centroidPoint;
        }
 
-       function centroidRingStart$1() {
-         centroidStream$1.point = centroidPointFirstRing;
+       function centroidRingStart() {
+         centroidStream.point = centroidPointFirstRing;
        }
 
-       function centroidRingEnd$1() {
+       function centroidRingEnd() {
          centroidPointRing(x00$1, y00$1);
        }
 
        function centroidPointFirstRing(x, y) {
-         centroidStream$1.point = centroidPointRing;
-         centroidPoint$1(x00$1 = x0$3 = x, y00$1 = y0$3 = y);
+         centroidStream.point = centroidPointRing;
+         centroidPoint(x00$1 = x0$1 = x, y00$1 = y0$1 = y);
        }
 
        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);
+         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 PathContext(context) {
                }
            }
          },
-         result: noop
+         result: noop$1
        };
 
-       var lengthSum$1 = new Adder(),
+       var lengthSum = new Adder(),
            lengthRing,
-           x00$2,
-           y00$2,
-           x0$4,
-           y0$4;
-       var lengthStream$1 = {
-         point: noop,
+           x00,
+           y00,
+           x0,
+           y0;
+       var lengthStream = {
+         point: noop$1,
          lineStart: function lineStart() {
-           lengthStream$1.point = lengthPointFirst$1;
+           lengthStream.point = lengthPointFirst;
          },
          lineEnd: function lineEnd() {
-           if (lengthRing) lengthPoint$1(x00$2, y00$2);
-           lengthStream$1.point = noop;
+           if (lengthRing) lengthPoint(x00, y00);
+           lengthStream.point = noop$1;
          },
          polygonStart: function polygonStart() {
            lengthRing = true;
            lengthRing = null;
          },
          result: function result() {
-           var length = +lengthSum$1;
-           lengthSum$1 = new Adder();
+           var length = +lengthSum;
+           lengthSum = 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 lengthPointFirst(x, y) {
+         lengthStream.point = lengthPoint;
+         x00 = x0 = x, y00 = y0 = 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 lengthPoint(x, y) {
+         x0 -= x, y0 -= y;
+         lengthSum.add(sqrt(x0 * x0 + y0 * y0));
+         x0 = x, y0 = y;
        }
 
        function PathString() {
          }
 
          path.area = function (object) {
-           d3_geoStream(object, projectionStream(areaStream$1));
-           return areaStream$1.result();
+           d3_geoStream(object, projectionStream(areaStream));
+           return areaStream.result();
          };
 
          path.measure = function (object) {
-           d3_geoStream(object, projectionStream(lengthStream$1));
-           return lengthStream$1.result();
+           d3_geoStream(object, projectionStream(lengthStream));
+           return lengthStream.result();
          };
 
          path.bounds = function (object) {
-           d3_geoStream(object, projectionStream(boundsStream$1));
-           return boundsStream$1.result();
+           d3_geoStream(object, projectionStream(boundsStream));
+           return boundsStream.result();
          };
 
          path.centroid = function (object) {
-           d3_geoStream(object, projectionStream(centroidStream$1));
-           return centroidStream$1.result();
+           d3_geoStream(object, projectionStream(centroidStream));
+           return centroidStream.result();
          };
 
          path.projection = function (_) {
-           return arguments.length ? (projectionStream = _ == null ? (projection = null, identity) : (projection = _).stream, path) : projection;
+           return arguments.length ? (projectionStream = _ == null ? (projection = null, identity$4) : (projection = _).stream, path) : projection;
          };
 
          path.context = function (_) {
 
        function d3_geoTransform (methods) {
          return {
-           stream: transformer(methods)
+           stream: transformer$1(methods)
          };
        }
-       function transformer(methods) {
+       function transformer$1(methods) {
          return function (stream) {
            var s = new TransformStream();
 
          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());
+         d3_geoStream(object, projection.stream(boundsStream));
+         fitBounds(boundsStream.result());
          if (clip != null) projection.clipExtent(clip);
          return projection;
        }
        }
 
        function resampleNone(project) {
-         return transformer({
+         return transformer$1({
            point: function point(x, y) {
              x = project(x, y);
              this.stream.point(x[0], x[1]);
              var a = a0 + a1,
                  b = b0 + b1,
                  c = c0 + c1,
-                 m = sqrt$1(a * a + b * b + c * c),
+                 m = sqrt(a * a + b * b + c * c),
                  phi2 = asin(c /= m),
-                 lambda2 = abs$2(abs$2(c) - 1) < epsilon || abs$2(lambda0 - lambda1) < epsilon ? (lambda0 + lambda1) / 2 : atan2(b, a),
+                 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],
          };
        }
 
-       var transformRadians = transformer({
+       var transformRadians = transformer$1({
          point: function point(x, y) {
            this.stream.point(x * radians, y * radians);
          }
        });
 
        function transformRotate(rotate) {
-         return transformer({
+         return transformer$1({
            point: function point(x, y) {
              var r = rotate(x, y);
              return this.stream.point(r[0], r[1]);
              y0,
              x1,
              y1,
-             postclip = identity,
+             postclip = identity$4,
              // post-clip extent
          delta2 = 0.5,
              // precision
 
          function invert(point) {
            point = projectRotateTransform.invert(point[0], point[1]);
-           return point && [point[0] * degrees, point[1] * degrees];
+           return point && [point[0] * degrees$1, point[1] * degrees$1];
          }
 
          projection.stream = function (stream) {
          };
 
          projection.clipAngle = function (_) {
-           return arguments.length ? (preclip = +_ ? clipCircle(theta = _ * radians) : (theta = null, clipAntimeridian), reset()) : theta * degrees;
+           return arguments.length ? (preclip = +_ ? clipCircle(theta = _ * radians) : (theta = null, clipAntimeridian), reset()) : theta * degrees$1;
          };
 
          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]];
+           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]];
          };
 
          projection.scale = function (_) {
          };
 
          projection.center = function (_) {
-           return arguments.length ? (lambda = _[0] % 360 * radians, phi = _[1] % 360 * radians, recenter()) : [lambda * degrees, phi * degrees];
+           return arguments.length ? (lambda = _[0] % 360 * radians, phi = _[1] % 360 * radians, recenter()) : [lambda * degrees$1, phi * degrees$1];
          };
 
          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];
+           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];
          };
 
          projection.angle = function (_) {
-           return arguments.length ? (alpha = _ % 360 * radians, recenter()) : alpha * degrees;
+           return arguments.length ? (alpha = _ % 360 * radians, recenter()) : alpha * degrees$1;
          };
 
          projection.reflectX = function (_) {
          };
 
          projection.precision = function (_) {
-           return arguments.length ? (projectResample = resample(projectTransform, delta2 = _ * _), reset()) : sqrt$1(delta2);
+           return arguments.length ? (projectResample = resample(projectTransform, delta2 = _ * _), reset()) : sqrt(delta2);
          };
 
          projection.fitExtent = function (extent, object) {
        }
 
        mercatorRaw.invert = function (x, y) {
-         return [x, 2 * atan(exp(y)) - halfPi];
+         return [x, 2 * atan(exp$2(y)) - halfPi];
        };
 
        function mercator () {
              // clip extent
          kx = 1,
              ky = 1,
-             transform = transformer({
+             transform = transformer$1({
            point: function point(x, y) {
              var p = projection([x, y]);
              this.stream.point(p[0], p[1]);
            }
          }),
-             postclip = identity,
+             postclip = identity$4,
              cache,
              cacheStream;
 
          };
 
          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]];
+           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]];
          };
 
          projection.scale = function (_) {
          };
 
          projection.angle = function (_) {
-           return arguments.length ? (alpha = _ % 360 * radians, sa = sin(alpha), ca = cos(alpha), reset()) : alpha * degrees;
+           return arguments.length ? (alpha = _ % 360 * radians, sa = sin(alpha), ca = cos(alpha), reset()) : alpha * degrees$1;
          };
 
          projection.reflectX = function (_) {
        // constants
        var TAU = 2 * Math.PI;
        var EQUATORIAL_RADIUS = 6356752.314245179;
-       var POLAR_RADIUS = 6378137.0;
+       var POLAR_RADIUS$1 = 6378137.0;
        function geoLatToMeters(dLat) {
-         return dLat * (TAU * POLAR_RADIUS / 360);
+         return dLat * (TAU * POLAR_RADIUS$1 / 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);
+         return m / (TAU * POLAR_RADIUS$1 / 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)];
+         return [meters[0] * tileSize / (TAU * EQUATORIAL_RADIUS), -meters[1] * tileSize / (TAU * POLAR_RADIUS$1)];
        }
        function geoOffsetToMeters(offset, tileSize) {
          tileSize = tileSize || 256;
-         return [offset[0] * TAU * EQUATORIAL_RADIUS / tileSize, -offset[1] * TAU * POLAR_RADIUS / tileSize];
+         return [offset[0] * TAU * EQUATORIAL_RADIUS / tileSize, -offset[1] * TAU * POLAR_RADIUS$1 / tileSize];
        } // Equirectangular approximation of spherical distances on Earth
 
        function geoSphericalDistance(a, b) {
          }
        });
 
-       var $every$1 = arrayIteration.every;
-
+       var $every = arrayIteration.every;
 
 
-       var STRICT_METHOD$6 = arrayMethodIsStrict('every');
-       var USES_TO_LENGTH$8 = arrayMethodUsesToLength('every');
+       var STRICT_METHOD$1 = arrayMethodIsStrict('every');
 
        // `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 }, {
+       // https://tc39.es/ecma262/#sec-array.prototype.every
+       _export({ target: 'Array', proto: true, forced: !STRICT_METHOD$1 }, {
          every: function every(callbackfn /* , thisArg */) {
-           return $every$1(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+           return $every(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
          }
        });
 
-       var $reduce$1 = arrayReduce.left;
-
+       var $reduce = arrayReduce.left;
 
 
 
 
-       var STRICT_METHOD$7 = arrayMethodIsStrict('reduce');
-       var USES_TO_LENGTH$9 = arrayMethodUsesToLength('reduce', { 1: 0 });
+       var STRICT_METHOD = arrayMethodIsStrict('reduce');
        // Chrome 80-82 has a critical bug
        // https://bugs.chromium.org/p/chromium/issues/detail?id=1049982
        var CHROME_BUG = !engineIsNode && engineV8Version > 79 && engineV8Version < 83;
 
        // `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 || CHROME_BUG }, {
+       // https://tc39.es/ecma262/#sec-array.prototype.reduce
+       _export({ target: 'Array', proto: true, forced: !STRICT_METHOD || CHROME_BUG }, {
          reduce: function reduce(callbackfn /* , initialValue */) {
-           return $reduce$1(this, callbackfn, arguments.length, arguments.length > 1 ? arguments[1] : undefined);
+           return $reduce(this, callbackfn, arguments.length, arguments.length > 1 ? arguments[1] : undefined);
          }
        });
 
 
          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 (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];
          }
        }
 
-       var noop$1 = {
+       var noop = {
          value: function value() {}
        };
 
-       function dispatch() {
+       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$1(_);
+         return new Dispatch(_);
        }
 
-       function Dispatch$1(_) {
+       function Dispatch(_) {
          this._ = _;
        }
 
-       function parseTypenames(typenames, types) {
+       function parseTypenames$1(typenames, types) {
          return typenames.trim().split(/^|\s+/).map(function (t) {
            var name = "",
                i = t.indexOf(".");
          });
        }
 
-       Dispatch$1.prototype = dispatch.prototype = {
-         constructor: Dispatch$1,
+       Dispatch.prototype = dispatch$8.prototype = {
+         constructor: Dispatch,
          on: function on(typename, callback) {
            var _ = this._,
-               T = parseTypenames(typename + "", _),
+               T = parseTypenames$1(typename + "", _),
                t,
                i = -1,
                n = T.length; // If no callback was specified, return the callback of the given type and name.
 
            if (arguments.length < 2) {
              while (++i < n) {
-               if ((t = (typename = T[i]).type) && (t = get$3(_[t], typename.name))) return t;
+               if ((t = (typename = T[i]).type) && (t = get$2(_[t], typename.name))) return t;
              }
 
              return;
            if (callback != null && typeof callback !== "function") throw new Error("invalid callback: " + callback);
 
            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);
+             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);
              }
            }
 
              copy[t] = _[t].slice();
            }
 
-           return new Dispatch$1(copy);
+           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) {
          }
        };
 
-       function get$3(type, name) {
+       function get$2(type, name) {
          for (var i = 0, n = type.length, c; i < n; ++i) {
            if ((c = type[i]).name === name) {
              return c.value;
          }
        }
 
-       function set$3(type, name, callback) {
+       function set$1(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));
+             type[i] = noop, type = type.slice(0, i).concat(type.slice(i + 1));
              break;
            }
          }
            }
          }
 
-         return new Selection(subgroups, this._parents);
+         return new Selection$1(subgroups, this._parents);
        }
 
        function array (x) {
            }
          }
 
-         return new Selection(subgroups, parents);
+         return new Selection$1(subgroups, parents);
        }
 
-       var $find$1 = arrayIteration.find;
-
+       var $find = arrayIteration.find;
 
 
        var FIND = 'find';
-       var SKIPS_HOLES = true;
-
-       var USES_TO_LENGTH$a = arrayMethodUsesToLength(FIND);
+       var SKIPS_HOLES$1 = true;
 
        // Shouldn't skip holes
-       if (FIND in []) Array(1)[FIND](function () { SKIPS_HOLES = false; });
+       if (FIND in []) Array(1)[FIND](function () { SKIPS_HOLES$1 = false; });
 
        // `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 }, {
+       // https://tc39.es/ecma262/#sec-array.prototype.find
+       _export({ target: 'Array', proto: true, forced: SKIPS_HOLES$1 }, {
          find: function find(callbackfn /* , that = undefined */) {
-           return $find$1(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+           return $find(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
          }
        });
 
-       // https://tc39.github.io/ecma262/#sec-array.prototype-@@unscopables
+       // https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
        addToUnscopables(FIND);
 
        function matcher (selector) {
          };
        }
 
-       var find$1 = Array.prototype.find;
+       var find = Array.prototype.find;
 
        function childFind(match) {
          return function () {
-           return find$1.call(this.children, match);
+           return find.call(this.children, match);
          };
        }
 
            }
          }
 
-         return new Selection(subgroups, this._parents);
+         return new Selection$1(subgroups, this._parents);
        }
 
        function sparse (update) {
        }
 
        function selection_enter () {
-         return new Selection(this._enter || this._groups.map(sparse), this._parents);
+         return new Selection$1(this._enter || this._groups.map(sparse), this._parents);
        }
        function EnterNode(parent, datum) {
          this.ownerDocument = parent.ownerDocument;
          }
        };
 
-       function constant (x) {
+       function constant$3 (x) {
          return function () {
            return x;
          };
          var bind = key ? bindKey : bindIndex,
              parents = this._parents,
              groups = this._groups;
-         if (typeof value !== "function") value = constant(value);
+         if (typeof value !== "function") value = constant$3(value);
 
          for (var m = groups.length, update = new Array(m), enter = new Array(m), exit = new Array(m), j = 0; j < m; ++j) {
            var parent = parents[j],
            }
          }
 
-         update = new Selection(update, parents);
+         update = new Selection$1(update, parents);
          update._enter = enter;
          update._exit = exit;
          return update;
        }
 
        function selection_exit () {
-         return new Selection(this._exit || this._groups.map(sparse), this._parents);
+         return new Selection$1(this._exit || this._groups.map(sparse), this._parents);
        }
 
        function selection_join (onenter, onupdate, onexit) {
        }
 
        function selection_merge (selection) {
-         if (!(selection instanceof Selection)) throw new Error("invalid merge");
+         if (!(selection instanceof Selection$1)) throw new Error("invalid merge");
 
          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) {
            merges[j] = groups0[j];
          }
 
-         return new Selection(merges, this._parents);
+         return new Selection$1(merges, this._parents);
        }
 
        function selection_order () {
            sortgroup.sort(compareNode);
          }
 
-         return new Selection(sortgroups, this._parents).order();
+         return new Selection$1(sortgroups, this._parents).order();
        }
 
        function ascending(a, b) {
          return this;
        }
 
-       function attrRemove(name) {
+       function attrRemove$1(name) {
          return function () {
            this.removeAttribute(name);
          };
        }
 
-       function attrRemoveNS(fullname) {
+       function attrRemoveNS$1(fullname) {
          return function () {
            this.removeAttributeNS(fullname.space, fullname.local);
          };
        }
 
-       function attrConstant(name, value) {
+       function attrConstant$1(name, value) {
          return function () {
            this.setAttribute(name, value);
          };
        }
 
-       function attrConstantNS(fullname, value) {
+       function attrConstantNS$1(fullname, value) {
          return function () {
            this.setAttributeNS(fullname.space, fullname.local, value);
          };
        }
 
-       function attrFunction(name, value) {
+       function attrFunction$1(name, value) {
          return function () {
            var v = value.apply(this, arguments);
            if (v == null) this.removeAttribute(name);else this.setAttribute(name, v);
          };
        }
 
-       function attrFunctionNS(fullname, value) {
+       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);
            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));
+         return this.each((value == null ? fullname.local ? attrRemoveNS$1 : attrRemove$1 : typeof value === "function" ? fullname.local ? attrFunctionNS$1 : attrFunction$1 : fullname.local ? attrConstantNS$1 : attrConstant$1)(fullname, value));
        }
 
        function defaultView (node) {
          || node.defaultView; // node is a Document
        }
 
-       function styleRemove(name) {
+       function styleRemove$1(name) {
          return function () {
            this.style.removeProperty(name);
          };
        }
 
-       function styleConstant(name, value, priority) {
+       function styleConstant$1(name, value, priority) {
          return function () {
            this.style.setProperty(name, value, priority);
          };
        }
 
-       function styleFunction(name, value, priority) {
+       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 selection_style (name, value, priority) {
-         return arguments.length > 1 ? this.each((value == null ? styleRemove : typeof value === "function" ? styleFunction : styleConstant)(name, value, priority == null ? "" : priority)) : styleValue(this.node(), name);
+         return 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);
          this.textContent = "";
        }
 
-       function textConstant(value) {
+       function textConstant$1(value) {
          return function () {
            this.textContent = value;
          };
        }
 
-       function textFunction(value) {
+       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 : textConstant)(value)) : this.node().textContent;
+         return arguments.length ? this.each(value == null ? textRemove : (typeof value === "function" ? textFunction$1 : textConstant$1)(value)) : this.node().textContent;
        }
 
        function htmlRemove() {
          });
        }
 
-       function remove() {
+       function remove$7() {
          var parent = this.parentNode;
          if (parent) parent.removeChild(this);
        }
 
        function selection_remove () {
-         return this.each(remove);
+         return this.each(remove$7);
        }
 
        function selection_cloneShallow() {
          };
        }
 
-       function parseTypenames$1(typenames) {
+       function parseTypenames(typenames) {
          return typenames.trim().split(/^|\s+/).map(function (t) {
            var name = "",
                i = t.indexOf(".");
        }
 
        function selection_on (typename, value, options) {
-         var typenames = parseTypenames$1(typename + ""),
+         var typenames = parseTypenames(typename + ""),
              i,
              n = typenames.length,
              t;
          return this;
        }
 
-       function dispatchEvent$1(node, type, params) {
+       function dispatchEvent(node, type, params) {
          var window = defaultView(node),
              event = window.CustomEvent;
 
 
        function dispatchConstant(type, params) {
          return function () {
-           return dispatchEvent$1(this, type, params);
+           return dispatchEvent(this, type, params);
          };
        }
 
        function dispatchFunction(type, params) {
          return function () {
-           return dispatchEvent$1(this, type, params.apply(this, arguments));
+           return dispatchEvent(this, type, params.apply(this, arguments));
          };
        }
 
          return this.each((typeof params === "function" ? dispatchFunction : dispatchConstant)(type, params));
        }
 
-       var _marked$2 = /*#__PURE__*/regeneratorRuntime.mark(_callee);
+       var _marked$1 = /*#__PURE__*/regeneratorRuntime.mark(_callee);
 
        function _callee() {
          var groups, j, m, group, i, n, node;
                  return _context.stop();
              }
            }
-         }, _marked$2, this);
+         }, _marked$1, this);
        }
 
-       var root = [null];
-       function Selection(groups, parents) {
+       var root$1 = [null];
+       function Selection$1(groups, parents) {
          this._groups = groups;
          this._parents = parents;
        }
 
        function selection() {
-         return new Selection([[document.documentElement]], root);
+         return new Selection$1([[document.documentElement]], root$1);
        }
 
        function selection_selection() {
          return this;
        }
 
-       Selection.prototype = selection.prototype = _defineProperty({
-         constructor: Selection,
+       Selection$1.prototype = selection.prototype = _defineProperty({
+         constructor: Selection$1,
          select: selection_select,
          selectAll: selection_selectAll,
          selectChild: selection_selectChild,
        }, Symbol.iterator, _callee);
 
        function select (selector) {
-         return typeof selector === "string" ? new Selection([[document.querySelector(selector)]], [document.documentElement]) : new Selection([[selector]], root);
+         return typeof selector === "string" ? new Selection$1([[document.querySelector(selector)]], [document.documentElement]) : new Selection$1([[selector]], root$1);
        }
 
        function sourceEvent (event) {
        }
 
        function selectAll (selector) {
-         return typeof selector === "string" ? new Selection([document.querySelectorAll(selector)], [document.documentElement]) : new Selection([selector == null ? [] : array(selector)], root);
+         return typeof selector === "string" ? new Selection$1([document.querySelectorAll(selector)], [document.documentElement]) : new Selection$1([selector == null ? [] : array(selector)], root$1);
        }
 
-       function nopropagation(event) {
+       function nopropagation$1(event) {
          event.stopImmediatePropagation();
        }
-       function noevent (event) {
+       function noevent$1 (event) {
          event.preventDefault();
          event.stopImmediatePropagation();
        }
 
        function dragDisable (view) {
          var root = view.document.documentElement,
-             selection = select(view).on("dragstart.drag", noevent, true);
+             selection = select(view).on("dragstart.drag", noevent$1, true);
 
          if ("onselectstart" in root) {
-           selection.on("selectstart.drag", noevent, true);
+           selection.on("selectstart.drag", noevent$1, true);
          } else {
            root.__noselect = root.style.MozUserSelect;
            root.style.MozUserSelect = "none";
              selection = select(view).on("dragstart.drag", null);
 
          if (noclick) {
-           selection.on("click.drag", noevent, true);
+           selection.on("click.drag", noevent$1, true);
            setTimeout(function () {
              selection.on("click.drag", null);
            }, 0);
          }
        }
 
-       var constant$1 = (function (x) {
+       var constant$2 = (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 DragEvent(type, _ref) {
          var sourceEvent = _ref.sourceEvent,
              subject = _ref.subject,
          return value === this._ ? this : value;
        };
 
-       function defaultFilter(event) {
+       function defaultFilter$2(event) {
          return !event.ctrlKey && !event.button;
        }
 
          } : d;
        }
 
-       function defaultTouchable() {
+       function defaultTouchable$1() {
          return navigator.maxTouchPoints || "ontouchstart" in this;
        }
 
        function d3_drag () {
-         var filter = defaultFilter,
+         var filter = defaultFilter$2,
              container = defaultContainer,
              subject = defaultSubject,
-             touchable = defaultTouchable,
+             touchable = defaultTouchable$1,
              gestures = {},
-             listeners = dispatch("start", "drag", "end"),
+             listeners = dispatch$8("start", "drag", "end"),
              active = 0,
              mousedownx,
              mousedowny,
            if (!gesture) return;
            select(event.view).on("mousemove.drag", mousemoved, true).on("mouseup.drag", mouseupped, true);
            dragDisable(event.view);
-           nopropagation(event);
+           nopropagation$1(event);
            mousemoving = false;
            mousedownx = event.clientX;
            mousedowny = event.clientY;
          }
 
          function mousemoved(event) {
-           noevent(event);
+           noevent$1(event);
 
            if (!mousemoving) {
              var dx = event.clientX - mousedownx,
          function mouseupped(event) {
            select(event.view).on("mousemove.drag mouseup.drag", null);
            yesdrag(event.view, mousemoving);
-           noevent(event);
+           noevent$1(event);
            gestures.mouse("end", event);
          }
 
 
            for (i = 0; i < n; ++i) {
              if (gesture = beforestart(this, c, event, d, touches[i].identifier, touches[i])) {
-               nopropagation(event);
+               nopropagation$1(event);
                gesture("start", event, touches[i]);
              }
            }
 
            for (i = 0; i < n; ++i) {
              if (gesture = gestures[touches[i].identifier]) {
-               noevent(event);
+               noevent$1(event);
                gesture("drag", event, touches[i]);
              }
            }
 
            for (i = 0; i < n; ++i) {
              if (gesture = gestures[touches[i].identifier]) {
-               nopropagation(event);
+               nopropagation$1(event);
                gesture("end", event, touches[i]);
              }
            }
          }
 
          drag.filter = function (_) {
-           return arguments.length ? (filter = typeof _ === "function" ? _ : constant$1(!!_), drag) : filter;
+           return arguments.length ? (filter = typeof _ === "function" ? _ : constant$2(!!_), drag) : filter;
          };
 
          drag.container = function (_) {
-           return arguments.length ? (container = typeof _ === "function" ? _ : constant$1(_), drag) : container;
+           return arguments.length ? (container = typeof _ === "function" ? _ : constant$2(_), drag) : container;
          };
 
          drag.subject = function (_) {
-           return arguments.length ? (subject = typeof _ === "function" ? _ : constant$1(_), drag) : subject;
+           return arguments.length ? (subject = typeof _ === "function" ? _ : constant$2(_), drag) : subject;
          };
 
          drag.touchable = function (_) {
-           return arguments.length ? (touchable = typeof _ === "function" ? _ : constant$1(!!_), drag) : touchable;
+           return arguments.length ? (touchable = typeof _ === "function" ? _ : constant$2(!!_), drag) : touchable;
          };
 
          drag.on = function () {
          return drag;
        }
 
-       var defineProperty$9 = objectDefineProperty.f;
+       var defineProperty$1 = objectDefineProperty.f;
        var getOwnPropertyNames$1 = objectGetOwnPropertyNames.f;
 
 
 
 
 
-       var setInternalState$8 = internalState.set;
+
+       var enforceInternalState = internalState.enforce;
+
+
 
 
 
        var MATCH$1 = wellKnownSymbol('match');
-       var NativeRegExp = global_1.RegExp;
-       var RegExpPrototype$1 = NativeRegExp.prototype;
+       var NativeRegExp = global$2.RegExp;
+       var RegExpPrototype = NativeRegExp.prototype;
+       // TODO: Use only propper RegExpIdentifierName
+       var IS_NCG = /^\?<[^\s\d!#%&*+<=>@^][^\s!#%&*+<=>@^]*>/;
        var re1 = /a/g;
        var re2 = /a/g;
 
        // "new" should create a new object, old webkit bug
        var CORRECT_NEW = new NativeRegExp(re1) !== re1;
 
-       var UNSUPPORTED_Y$2 = regexpStickyHelpers.UNSUPPORTED_Y;
+       var UNSUPPORTED_Y = regexpStickyHelpers.UNSUPPORTED_Y;
+
+       var BASE_FORCED = descriptors &&
+         (!CORRECT_NEW || UNSUPPORTED_Y || regexpUnsupportedDotAll || regexpUnsupportedNcg || 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';
+         }));
+
+       var handleDotAll = function (string) {
+         var length = string.length;
+         var index = 0;
+         var result = '';
+         var brackets = false;
+         var chr;
+         for (; index <= length; index++) {
+           chr = string.charAt(index);
+           if (chr === '\\') {
+             result += chr + string.charAt(++index);
+             continue;
+           }
+           if (!brackets && chr === '.') {
+             result += '[\\s\\S]';
+           } else {
+             if (chr === '[') {
+               brackets = true;
+             } else if (chr === ']') {
+               brackets = false;
+             } result += chr;
+           }
+         } return result;
+       };
 
-       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';
-       })));
+       var handleNCG = function (string) {
+         var length = string.length;
+         var index = 0;
+         var result = '';
+         var named = [];
+         var names = {};
+         var brackets = false;
+         var ncg = false;
+         var groupid = 0;
+         var groupname = '';
+         var chr;
+         for (; index <= length; index++) {
+           chr = string.charAt(index);
+           if (chr === '\\') {
+             chr = chr + string.charAt(++index);
+           } else if (chr === ']') {
+             brackets = false;
+           } else if (!brackets) switch (true) {
+             case chr === '[':
+               brackets = true;
+               break;
+             case chr === '(':
+               if (IS_NCG.test(string.slice(index + 1))) {
+                 index += 2;
+                 ncg = true;
+               }
+               result += chr;
+               groupid++;
+               continue;
+             case chr === '>' && ncg:
+               if (groupname === '' || has$1(names, groupname)) {
+                 throw new SyntaxError('Invalid capture group name');
+               }
+               names[groupname] = true;
+               named.push([groupname, groupid]);
+               ncg = false;
+               groupname = '';
+               continue;
+           }
+           if (ncg) groupname += chr;
+           else result += chr;
+         } return [result, named];
+       };
 
        // `RegExp` constructor
-       // https://tc39.github.io/ecma262/#sec-regexp-constructor
-       if (FORCED$b) {
+       // https://tc39.es/ecma262/#sec-regexp-constructor
+       if (isForced_1('RegExp', BASE_FORCED)) {
          var RegExpWrapper = function RegExp(pattern, flags) {
            var thisIsRegExp = this instanceof RegExpWrapper;
            var patternIsRegExp = isRegexp(pattern);
            var flagsAreUndefined = flags === undefined;
-           var sticky;
+           var groups = [];
+           var rawPattern, rawFlags, dotAll, sticky, handled, result, state;
 
            if (!thisIsRegExp && patternIsRegExp && pattern.constructor === RegExpWrapper && flagsAreUndefined) {
              return pattern;
              pattern = pattern.source;
            }
 
-           if (UNSUPPORTED_Y$2) {
+           pattern = pattern === undefined ? '' : String(pattern);
+           flags = flags === undefined ? '' : String(flags);
+           rawPattern = pattern;
+
+           if (regexpUnsupportedDotAll && 'dotAll' in re1) {
+             dotAll = !!flags && flags.indexOf('s') > -1;
+             if (dotAll) flags = flags.replace(/s/g, '');
+           }
+
+           rawFlags = flags;
+
+           if (UNSUPPORTED_Y && 'sticky' in re1) {
              sticky = !!flags && flags.indexOf('y') > -1;
              if (sticky) flags = flags.replace(/y/g, '');
            }
 
-           var result = inheritIfRequired(
+           if (regexpUnsupportedNcg) {
+             handled = handleNCG(pattern);
+             pattern = handled[0];
+             groups = handled[1];
+           }
+
+           result = inheritIfRequired(
              CORRECT_NEW ? new NativeRegExp(pattern, flags) : NativeRegExp(pattern, flags),
-             thisIsRegExp ? this : RegExpPrototype$1,
+             thisIsRegExp ? this : RegExpPrototype,
              RegExpWrapper
            );
 
-           if (UNSUPPORTED_Y$2 && sticky) setInternalState$8(result, { sticky: sticky });
+           if (dotAll || sticky || groups.length) {
+             state = enforceInternalState(result);
+             if (dotAll) {
+               state.dotAll = true;
+               state.raw = RegExpWrapper(handleDotAll(pattern), rawFlags);
+             }
+             if (sticky) state.sticky = true;
+             if (groups.length) state.groups = groups;
+           }
+
+           if (pattern !== rawPattern) try {
+             // fails in old engines, but we have no alternatives for unsupported regex syntax
+             createNonEnumerableProperty(result, 'source', rawPattern === '' ? '(?:)' : rawPattern);
+           } catch (error) { /* empty */ }
 
            return result;
          };
+
          var proxy = function (key) {
-           key in RegExpWrapper || defineProperty$9(RegExpWrapper, key, {
+           key in RegExpWrapper || defineProperty$1(RegExpWrapper, key, {
              configurable: true,
              get: function () { return NativeRegExp[key]; },
              set: function (it) { NativeRegExp[key] = it; }
            });
          };
-         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);
+
+         for (var keys$1 = getOwnPropertyNames$1(NativeRegExp), index$1 = 0; keys$1.length > index$1;) {
+           proxy(keys$1[index$1++]);
+         }
+
+         RegExpPrototype.constructor = RegExpWrapper;
+         RegExpWrapper.prototype = RegExpPrototype;
+         redefine(global$2, 'RegExp', RegExpWrapper);
        }
 
-       // https://tc39.github.io/ecma262/#sec-get-regexp-@@species
+       // 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(parent, definition) {
+       function extend$3(parent, definition) {
          var prototype = Object.create(parent.prototype);
 
          for (var key in definition) {
          this.b = +b;
          this.opacity = +opacity;
        }
-       define(Rgb, rgb, extend(Color, {
+       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);
        }));
 
        function rgb_formatHex() {
-         return "#" + hex$2(this.r) + hex$2(this.g) + hex$2(this.b);
+         return "#" + hex$1(this.r) + hex$1(this.g) + hex$1(this.b);
        }
 
        function rgb_formatRgb() {
          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 hex$2(value) {
+       function hex$1(value) {
          value = Math.max(0, Math.min(255, Math.round(value) || 0));
          return (value < 16 ? "0" : "") + value.toString(16);
        }
          this.opacity = +opacity;
        }
 
-       define(Hsl, hsl, extend(Color, {
+       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);
          return (h < 60 ? m1 + (m2 - m1) * h / 60 : h < 180 ? m2 : h < 240 ? m1 + (m2 - m1) * (240 - h) / 60 : m1) * 255;
        }
 
-       var constant$2 = (function (x) {
+       var constant$1 = (function (x) {
          return function () {
            return x;
          };
        });
 
-       function linear(a, d) {
+       function linear$2(a, d) {
          return function (t) {
            return a + t * d;
          };
        }
        function gamma(y) {
          return (y = +y) === 1 ? nogamma : function (a, b) {
-           return b - a ? exponential(a, b, y) : constant$2(isNaN(a) ? b : a);
+           return b - a ? exponential(a, b, y) : constant$1(isNaN(a) ? b : a);
          };
        }
        function nogamma(a, b) {
          var d = b - a;
-         return d ? linear(a, d) : constant$2(isNaN(a) ? b : a);
+         return d ? linear$2(a, d) : constant$1(isNaN(a) ? b : a);
        }
 
        var d3_interpolateRgb = (function rgbGamma(y) {
              i;
 
          for (i = 0; i < na; ++i) {
-           x[i] = interpolate(a[i], b[i]);
+           x[i] = interpolate$1(a[i], b[i]);
          }
 
          for (; i < nb; ++i) {
 
          for (k in b) {
            if (k in a) {
-             i[k] = interpolate(a[k], b[k]);
+             i[k] = interpolate$1(a[k], b[k]);
            } else {
              c[k] = b[k];
            }
          });
        }
 
-       function interpolate (a, b) {
+       function interpolate$1 (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);
+         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 interpolateRound (a, b) {
          };
        }
 
-       var degrees$1 = 180 / Math.PI;
-       var identity$1 = {
+       var degrees = 180 / Math.PI;
+       var identity$3 = {
          translateX: 0,
          translateY: 0,
          rotate: 0,
          return {
            translateX: e,
            translateY: f,
-           rotate: Math.atan2(b, a) * degrees$1,
-           skewX: Math.atan(skewX) * degrees$1,
+           rotate: Math.atan2(b, a) * degrees,
+           skewX: Math.atan(skewX) * degrees,
            scaleX: scaleX,
            scaleY: scaleY
          };
 
        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);
+         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$1;
+         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$1;
+         if (!(value = svgNode.transform.baseVal.consolidate())) return identity$3;
          value = value.matrix;
          return decompose(value.a, value.b, value.c, value.d, value.e, value.f);
        }
        var interpolateTransformCss = interpolateTransform(parseCss, "px, ", "px)", "deg)");
        var interpolateTransformSvg = interpolateTransform(parseSvg, ", ", ")", ")");
 
-       var epsilon2$1 = 1e-12;
+       var epsilon2 = 1e-12;
 
        function cosh(x) {
          return ((x = Math.exp(x)) + 1 / x) / 2;
                i,
                S; // Special case for u0 ≅ u1.
 
-           if (d2 < epsilon2$1) {
+           if (d2 < epsilon2) {
              S = Math.log(w1 / w0) / rho;
 
              i = function i(t) {
        }
 
        // `Function.prototype.bind` method
-       // https://tc39.github.io/ecma262/#sec-function.prototype.bind
+       // https://tc39.es/ecma262/#sec-function.prototype.bind
        _export({ target: 'Function', proto: true }, {
          bind: functionBind
        });
            setFrame = (typeof window === "undefined" ? "undefined" : _typeof(window)) === "object" && window.requestAnimationFrame ? window.requestAnimationFrame.bind(window) : function (f) {
          setTimeout(f, 17);
        };
-       function now() {
+       function now$1() {
          return clockNow || (setFrame(clearNow), clockNow = clock.now() + clockSkew);
        }
 
          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);
+           time = (time == null ? now$1() : +time) + (delay == null ? 0 : +delay);
 
            if (!this._next && taskTail !== this) {
              if (taskTail) taskTail._next = this;else taskHead = this;
          return t;
        }
        function timerFlush() {
-         now(); // Get the current time, if not already set.
+         now$1(); // Get the current time, if not already set.
 
          ++frame; // Pretend we’ve set an alarm, if we haven’t already.
 
          return t;
        }
 
-       var emptyOn = dispatch("start", "end", "cancel", "interrupt");
+       var emptyOn = dispatch$8("start", "end", "cancel", "interrupt");
        var emptyTween = [];
        var CREATED = 0;
        var SCHEDULED = 1;
        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, {
+         create$2(node, id, {
            name: name,
            index: index,
            // For context during callback.
          });
        }
        function init(node, id) {
-         var schedule = get$4(node, id);
+         var schedule = get$1(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);
+       function set(node, id) {
+         var schedule = get$1(node, id);
          if (schedule.state > STARTED) throw new Error("too late; already running");
          return schedule;
        }
-       function get$4(node, id) {
+       function get$1(node, id) {
          var schedule = node.__transition;
          if (!schedule || !(schedule = schedule[id])) throw new Error("transition not found");
          return schedule;
        }
 
-       function create(node, id, self) {
+       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 tweenRemove(id, name) {
          var tween0, tween1;
          return function () {
-           var schedule = set$4(this, id),
+           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.
          var tween0, tween1;
          if (typeof value !== "function") throw new Error();
          return function () {
-           var schedule = set$4(this, id),
+           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.
          name += "";
 
          if (arguments.length < 2) {
-           var tween = get$4(this.node(), id).tween;
+           var tween = get$1(this.node(), id).tween;
 
            for (var i = 0, n = tween.length, t; i < n; ++i) {
              if ((t = tween[i]).name === name) {
        function tweenValue(transition, name, value) {
          var id = transition._id;
          transition.each(function () {
-           var schedule = set$4(this, id);
+           var schedule = set(this, id);
            (schedule.value || (schedule.value = {}))[name] = value.apply(this, arguments);
          });
          return function (node) {
-           return get$4(node, id).value[name];
+           return get$1(node, id).value[name];
          };
        }
 
-       function interpolate$1 (a, b) {
+       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 attrRemove$1(name) {
+       function attrRemove(name) {
          return function () {
            this.removeAttribute(name);
          };
        }
 
-       function attrRemoveNS$1(fullname) {
+       function attrRemoveNS(fullname) {
          return function () {
            this.removeAttributeNS(fullname.space, fullname.local);
          };
        }
 
-       function attrConstant$1(name, interpolate, value1) {
+       function attrConstant(name, interpolate, value1) {
          var string00,
              string1 = value1 + "",
              interpolate0;
          };
        }
 
-       function attrConstantNS$1(fullname, interpolate, value1) {
+       function attrConstantNS(fullname, interpolate, value1) {
          var string00,
              string1 = value1 + "",
              interpolate0;
          };
        }
 
-       function attrFunction$1(name, interpolate, value) {
+       function attrFunction(name, interpolate, value) {
          var string00, string10, interpolate0;
          return function () {
            var string0,
          };
        }
 
-       function attrFunctionNS$1(fullname, interpolate, value) {
+       function attrFunctionNS(fullname, interpolate, value) {
          var string00, string10, interpolate0;
          return function () {
            var string0,
 
        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));
+             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 attrInterpolate(name, i) {
 
        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;
+         return arguments.length ? this.each((typeof value === "function" ? delayFunction : delayConstant)(id, value)) : get$1(this.node(), id).delay;
        }
 
        function durationFunction(id, value) {
          return function () {
-           set$4(this, id).duration = +value.apply(this, arguments);
+           set(this, id).duration = +value.apply(this, arguments);
          };
        }
 
        function durationConstant(id, value) {
          return value = +value, function () {
-           set$4(this, id).duration = value;
+           set(this, id).duration = value;
          };
        }
 
        function transition_duration (value) {
          var id = this._id;
-         return arguments.length ? this.each((typeof value === "function" ? durationFunction : durationConstant)(id, value)) : get$4(this.node(), id).duration;
+         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$4(this, id).ease = value;
+           set(this, id).ease = value;
          };
        }
 
        function transition_ease (value) {
          var id = this._id;
-         return arguments.length ? this.each(easeConstant(id, value)) : get$4(this.node(), id).ease;
+         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$4(this, id).ease = v;
+           set(this, id).ease = v;
          };
        }
 
        function onFunction(id, name, listener) {
          var on0,
              on1,
-             sit = start(name) ? init : set$4;
+             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,
 
        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));
+         return arguments.length < 2 ? get$1(this.node(), id).on.on(name) : this.each(onFunction(id, name, listener));
        }
 
        function removeFunction(id) {
              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));
+               schedule(subgroup[i], name, id, i, subgroup, get$1(node, id));
              }
            }
          }
          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) {
+               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 new Transition(subgroups, parents, name, id);
        }
 
-       var Selection$1 = selection.prototype.constructor;
+       var Selection = selection.prototype.constructor;
        function transition_selection () {
-         return new Selection$1(this._groups, this._parents);
+         return new Selection(this._groups, this._parents);
        }
 
        function styleNull(name, interpolate) {
          };
        }
 
-       function styleRemove$1(name) {
+       function styleRemove(name) {
          return function () {
            this.style.removeProperty(name);
          };
        }
 
-       function styleConstant$1(name, interpolate, value1) {
+       function styleConstant(name, interpolate, value1) {
          var string00,
              string1 = value1 + "",
              interpolate0;
          };
        }
 
-       function styleFunction$1(name, interpolate, value) {
+       function styleFunction(name, interpolate, value) {
          var string00, string10, interpolate0;
          return function () {
            var string0 = styleValue(this, name),
              event = "end." + key,
              remove;
          return function () {
-           var schedule = set$4(this, id),
+           var schedule = set(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,
+               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 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);
+         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);
        }
 
        function styleInterpolate(name, i, priority) {
          return this.tween(key, styleTween(name, value, priority == null ? "" : priority));
        }
 
-       function textConstant$1(value) {
+       function textConstant(value) {
          return function () {
            this.textContent = value;
          };
        }
 
-       function textFunction$1(value) {
+       function textFunction(value) {
          return function () {
            var value1 = value(this);
            this.textContent = value1 == null ? "" : value1;
        }
 
        function transition_text (value) {
-         return this.tween("text", typeof value === "function" ? textFunction$1(tweenValue(this, "text", value)) : textConstant$1(value == null ? "" : value + ""));
+         return this.tween("text", typeof value === "function" ? textFunction(tweenValue(this, "text", value)) : textConstant(value == null ? "" : value + ""));
        }
 
        function textInterpolate(i) {
          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);
+               var inherit = get$1(node, id0);
                schedule(node, name, id1, i, group, {
                  time: inherit.time + inherit.delay + inherit.duration,
                  delay: 0,
              }
            };
            that.each(function () {
-             var schedule = set$4(this, id),
+             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.
          });
        }
 
-       var id$1 = 0;
+       var id = 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;
+         return ++id;
        }
        var selection_prototype = selection.prototype;
-       Transition.prototype = transition.prototype = _defineProperty({
+       Transition.prototype = _defineProperty({
          constructor: Transition,
          select: transition_select,
          selectAll: transition_selectAll,
          if (name instanceof Transition) {
            id = name._id, name = name._name;
          } else {
-           id = newId(), (timing = defaultTiming).time = now(), name = name == null ? null : name + "";
+           id = newId(), (timing = defaultTiming).time = now$1(), name = name == null ? null : name + "";
          }
 
          for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) {
        selection.prototype.interrupt = selection_interrupt;
        selection.prototype.transition = selection_transition;
 
-       var constant$3 = (function (x) {
+       var constant = (function (x) {
          return function () {
            return x;
          };
        };
        var identity$2 = new Transform(1, 0, 0);
 
-       function nopropagation$1(event) {
+       function nopropagation(event) {
          event.stopImmediatePropagation();
        }
-       function noevent$1 (event) {
+       function noevent (event) {
          event.preventDefault();
          event.stopImmediatePropagation();
        }
          return (!event.ctrlKey || event.type === 'wheel') && !event.button;
        }
 
-       function defaultExtent() {
+       function defaultExtent$1() {
          var e = this;
 
          if (e instanceof SVGElement) {
          return this.__zoom || identity$2;
        }
 
-       function defaultWheelDelta(event) {
+       function defaultWheelDelta$1(event) {
          return -event.deltaY * (event.deltaMode === 1 ? 0.05 : event.deltaMode ? 1 : 0.002) * (event.ctrlKey ? 10 : 1);
        }
 
-       function defaultTouchable$1() {
+       function defaultTouchable() {
          return navigator.maxTouchPoints || "ontouchstart" in this;
        }
 
-       function defaultConstrain(transform, extent, translateExtent) {
+       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],
 
        function d3_zoom () {
          var filter = defaultFilter$1,
-             extent = defaultExtent,
-             constrain = defaultConstrain,
-             wheelDelta = defaultWheelDelta,
-             touchable = defaultTouchable$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("start", "zoom", "end"),
+             listeners = dispatch$8("start", "zoom", "end"),
              touchstarting,
              touchfirst,
              touchending,
                  g.start();
                }
 
-           noevent$1(event);
+           noevent(event);
            g.wheel = setTimeout(wheelidled, wheelDelay);
            g.zoom("mouse", constrain(translate(scale(t, k), g.mouse[0], g.mouse[1]), g.extent, translateExtent));
 
                x0 = event.clientX,
                y0 = event.clientY;
            dragDisable(event.view);
-           nopropagation$1(event);
+           nopropagation(event);
            g.mouse = [p, this.__zoom.invert(p)];
            interrupt(this);
            g.start();
 
            function mousemoved(event) {
-             noevent$1(event);
+             noevent(event);
 
              if (!g.moved) {
                var dx = event.clientX - x0,
            function mouseupped(event) {
              v.on("mousemove.zoom mouseup.zoom", null);
              yesdrag(event.view, g.moved);
-             noevent$1(event);
+             noevent(event);
              g.event(event).end();
            }
          }
                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);
+           noevent(event);
            if (duration > 0) select(this).transition().duration(duration).call(schedule, t1, p0, event);else select(this).call(zoom.transform, t1, p0, event);
          }
 
                i,
                t,
                p;
-           nopropagation$1(event);
+           nopropagation(event);
 
            for (i = 0; i < n; ++i) {
              t = touches[i], p = pointer(t, this);
                t,
                p,
                l;
-           noevent$1(event);
+           noevent(event);
 
            for (i = 0; i < n; ++i) {
              t = touches[i], p = pointer(t, this);
                n = touches.length,
                i,
                t;
-           nopropagation$1(event);
+           nopropagation(event);
            if (touchending) clearTimeout(touchending);
            touchending = setTimeout(function () {
              touchending = null;
          }
 
          zoom.wheelDelta = function (_) {
-           return arguments.length ? (wheelDelta = typeof _ === "function" ? _ : constant$3(+_), zoom) : wheelDelta;
+           return arguments.length ? (wheelDelta = typeof _ === "function" ? _ : constant(+_), zoom) : wheelDelta;
          };
 
          zoom.filter = function (_) {
-           return arguments.length ? (filter = typeof _ === "function" ? _ : constant$3(!!_), zoom) : filter;
+           return arguments.length ? (filter = typeof _ === "function" ? _ : constant(!!_), zoom) : filter;
          };
 
          zoom.touchable = function (_) {
-           return arguments.length ? (touchable = typeof _ === "function" ? _ : constant$3(!!_), zoom) : touchable;
+           return arguments.length ? (touchable = typeof _ === "function" ? _ : constant(!!_), zoom) : touchable;
          };
 
          zoom.extent = function (_) {
-           return arguments.length ? (extent = typeof _ === "function" ? _ : constant$3([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), zoom) : extent;
+           return arguments.length ? (extent = typeof _ === "function" ? _ : constant([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), zoom) : extent;
          };
 
          zoom.scaleExtent = function (_) {
 
        var onFreeze = internalMetadata.onFreeze;
 
-       var nativeFreeze = Object.freeze;
-       var FAILS_ON_PRIMITIVES$4 = fails(function () { nativeFreeze(1); });
+       // eslint-disable-next-line es/no-object-freeze -- safe
+       var $freeze = Object.freeze;
+       var FAILS_ON_PRIMITIVES = fails(function () { $freeze(1); });
 
        // `Object.freeze` method
-       // https://tc39.github.io/ecma262/#sec-object.freeze
-       _export({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES$4, sham: !freezing }, {
+       // https://tc39.es/ecma262/#sec-object.freeze
+       _export({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES, sham: !freezing }, {
          freeze: function freeze(it) {
-           return nativeFreeze && isObject(it) ? nativeFreeze(onFreeze(it)) : it;
+           return $freeze && isObject$4(it) ? $freeze(onFreeze(it)) : it;
          }
        });
 
        }
 
        // @@match logic
-       fixRegexpWellKnownSymbolLogic('match', 1, function (MATCH, nativeMatch, maybeCallNative) {
+       fixRegexpWellKnownSymbolLogic('match', function (MATCH, nativeMatch, maybeCallNative) {
          return [
            // `String.prototype.match` method
-           // https://tc39.github.io/ecma262/#sec-string.prototype.match
+           // https://tc39.es/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);
+           // https://tc39.es/ecma262/#sec-regexp.prototype-@@match
+           function (string) {
+             var res = maybeCallNative(nativeMatch, this, string);
              if (res.done) return res.value;
 
-             var rx = anObject(regexp);
-             var S = String(this);
+             var rx = anObject(this);
+             var S = String(string);
 
              if (!rx.global) return regexpExecAbstract(rx, S);
 
          ];
        });
 
-       var remove$1 = removeDiacritics;
+       var remove$6 = removeDiacritics;
        var replacementList = [{
          base: ' ',
          chars: "\xA0"
        }];
        var diacriticsMap = {};
 
-       for (var i = 0; i < replacementList.length; i += 1) {
-         var chars = replacementList[i].chars;
+       for (var i$1 = 0; i$1 < replacementList.length; i$1 += 1) {
+         var chars = replacementList[i$1].chars;
 
          for (var j$1 = 0; j$1 < chars.length; j$1 += 1) {
-           diacriticsMap[chars[j$1]] = replacementList[i].base;
+           diacriticsMap[chars[j$1]] = replacementList[i$1].base;
          }
        }
 
        var replacementList_1 = replacementList;
        var diacriticsMap_1 = diacriticsMap;
        var diacritics = {
-         remove: remove$1,
+         remove: remove$6,
          replacementList: replacementList_1,
          diacriticsMap: diacriticsMap_1
        };
 
-       var isArabic_1 = createCommonjsModule(function (module, exports) {
-
-         Object.defineProperty(exports, "__esModule", {
-           value: true
-         });
-         var arabicBlocks = [[0x0600, 0x06FF], [0x0750, 0x077F], [0x08A0, 0x08FF], [0xFB50, 0xFDFF], [0xFE70, 0xFEFF], [0x10E60, 0x10E7F], [0x1EC70, 0x1ECBF], [0x1EE00, 0x1EEFF] // Mathematical Alphabetic symbols https://www.unicode.org/charts/PDF/U1EE00.pdf
-         ];
+       var arabicBlocks = [[0x0600, 0x06FF], [0x0750, 0x077F], [0x08A0, 0x08FF], [0xFB50, 0xFDFF], [0xFE70, 0xFEFF], [0x10E60, 0x10E7F], [0x1EC70, 0x1ECBF], [0x1EE00, 0x1EEFF] // Mathematical Alphabetic symbols https://www.unicode.org/charts/PDF/U1EE00.pdf
+       ];
 
-         function isArabic(_char) {
-           if (_char.length > 1) {
-             // allow the newer chars?
-             throw new Error('isArabic works on only one-character strings');
-           }
+       function isArabic(_char) {
+         if (_char.length > 1) {
+           // allow the newer chars?
+           throw new Error('isArabic works on only one-character strings');
+         }
 
-           var code = _char.charCodeAt(0);
+         var code = _char.charCodeAt(0);
 
-           for (var i = 0; i < arabicBlocks.length; i++) {
-             var block = arabicBlocks[i];
+         for (var i = 0; i < arabicBlocks.length; i++) {
+           var block = arabicBlocks[i];
 
-             if (code >= block[0] && code <= block[1]) {
-               return true;
-             }
+           if (code >= block[0] && code <= block[1]) {
+             return true;
            }
-
-           return false;
          }
 
-         exports.isArabic = isArabic;
-
-         function isMath(_char2) {
-           if (_char2.length > 2) {
-             // allow the newer chars?
-             throw new Error('isMath works on only one-character strings');
-           }
+         return false;
+       }
 
-           var code = _char2.charCodeAt(0);
+       var isArabic_2 = isArabic;
 
-           return code >= 0x660 && code <= 0x66C || code >= 0x6F0 && code <= 0x6F9;
+       function isMath(_char2) {
+         if (_char2.length > 2) {
+           // allow the newer chars?
+           throw new Error('isMath works on only one-character strings');
          }
 
-         exports.isMath = isMath;
-       });
+         var code = _char2.charCodeAt(0);
 
-       var unicodeArabic = createCommonjsModule(function (module, exports) {
+         return code >= 0x660 && code <= 0x66C || code >= 0x6F0 && code <= 0x6F9;
+       }
 
-         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"
+       var isMath_1 = isMath;
+       var isArabic_1 = /*#__PURE__*/Object.defineProperty({
+         isArabic: isArabic_2,
+         isMath: isMath_1
+       }, '__esModule', {
+         value: true
+       });
+
+       var arabicReference = {
+         "alef": {
+           "normal": ["\u0627"],
+           "madda_above": {
+             "normal": ["\u0627\u0653", "\u0622"],
+             "isolated": "\uFE81",
+             "final": "\uFE82"
            },
-           "e": {
-             "normal": ["\u06D0"],
-             "isolated": "\uFBE4",
-             "final": "\uFBE5",
-             "initial": "\uFBE6",
-             "medial": "\uFBE7"
+           "hamza_above": {
+             "normal": ["\u0627\u0654", "\u0623"],
+             "isolated": "\uFE83",
+             "final": "\uFE84"
            },
-           "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"
+           "hamza_below": {
+             "normal": ["\u0627\u0655", "\u0625"],
+             "isolated": "\uFE87",
+             "final": "\uFE88"
            },
-           "ae": {
-             "normal": ["\u06D5"],
-             "isolated": "\u06D5",
-             "final": "\uFEEA",
-             "yeh_above": {
-               "normal": ["\u06C0", "\u06D5\u0654"],
-               "isolated": "\uFBA4",
-               "final": "\uFBA5"
-             }
+           "wasla": {
+             "normal": "\u0671",
+             "isolated": "\uFB50",
+             "final": "\uFB51"
            },
-           "rohingya yeh": {
-             "normal": ["\u08AC"]
+           "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"
            },
-           "low alef": {
-             "normal": ["\u08AD"]
+           "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"
            },
-           "straight waw": {
-             "normal": ["\u08B1"]
+           "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"
            },
-           "african feh": {
-             "normal": ["\u08BB"]
+           "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"
            },
-           "african qaf": {
-             "normal": ["\u08BC"]
+           "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"
            },
-           "african noon": {
-             "normal": ["\u08BD"]
+           "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"
            }
-         };
-         exports["default"] = arabicReference;
+         },
+         "rohingya yeh": {
+           "normal": ["\u08AC"]
+         },
+         "low alef": {
+           "normal": ["\u08AD"]
+         },
+         "straight waw": {
+           "normal": ["\u08B1"]
+         },
+         "african feh": {
+           "normal": ["\u08BB"]
+         },
+         "african qaf": {
+           "normal": ["\u08BC"]
+         },
+         "african noon": {
+           "normal": ["\u08BD"]
+         }
+       };
+       var _default$3 = arabicReference;
+       var unicodeArabic = /*#__PURE__*/Object.defineProperty({
+         "default": _default$3
+       }, '__esModule', {
+         value: true
+       });
+
+       var ligatureReference = {
+         "\u0626\u0627": {
+           "isolated": "\uFBEA",
+           "final": "\uFBEB"
+         },
+         "\u0626\u06D5": {
+           "isolated": "\uFBEC",
+           "final": "\uFBED"
+         },
+         "\u0626\u0648": {
+           "isolated": "\uFBEE",
+           "final": "\uFBEF"
+         },
+         "\u0626\u06C7": {
+           "isolated": "\uFBF0",
+           "final": "\uFBF1"
+         },
+         "\u0626\u06C6": {
+           "isolated": "\uFBF2",
+           "final": "\uFBF3"
+         },
+         "\u0626\u06C8": {
+           "isolated": "\uFBF4",
+           "final": "\uFBF5"
+         },
+         "\u0626\u06D0": {
+           "isolated": "\uFBF6",
+           "final": "\uFBF7",
+           "initial": "\uFBF8"
+         },
+         "\u0626\u0649": {
+           "uighur_kirghiz": {
+             "isolated": "\uFBF9",
+             "final": "\uFBFA",
+             "initial": "\uFBFB"
+           },
+           "isolated": "\uFC03",
+           "final": "\uFC68"
+         },
+         "\u0626\u062C": {
+           "isolated": "\uFC00",
+           "initial": "\uFC97"
+         },
+         "\u0626\u062D": {
+           "isolated": "\uFC01",
+           "initial": "\uFC98"
+         },
+         "\u0626\u0645": {
+           "isolated": "\uFC02",
+           "final": "\uFC66",
+           "initial": "\uFC9A",
+           "medial": "\uFCDF"
+         },
+         "\u0626\u064A": {
+           "isolated": "\uFC04",
+           "final": "\uFC69"
+         },
+         "\u0628\u062C": {
+           "isolated": "\uFC05",
+           "initial": "\uFC9C"
+         },
+         "\u0628\u062D": {
+           "isolated": "\uFC06",
+           "initial": "\uFC9D"
+         },
+         "\u0628\u062E": {
+           "isolated": "\uFC07",
+           "initial": "\uFC9E"
+         },
+         "\u0628\u0645": {
+           "isolated": "\uFC08",
+           "final": "\uFC6C",
+           "initial": "\uFC9F",
+           "medial": "\uFCE1"
+         },
+         "\u0628\u0649": {
+           "isolated": "\uFC09",
+           "final": "\uFC6E"
+         },
+         "\u0628\u064A": {
+           "isolated": "\uFC0A",
+           "final": "\uFC6F"
+         },
+         "\u062A\u062C": {
+           "isolated": "\uFC0B",
+           "initial": "\uFCA1"
+         },
+         "\u062A\u062D": {
+           "isolated": "\uFC0C",
+           "initial": "\uFCA2"
+         },
+         "\u062A\u062E": {
+           "isolated": "\uFC0D",
+           "initial": "\uFCA3"
+         },
+         "\u062A\u0645": {
+           "isolated": "\uFC0E",
+           "final": "\uFC72",
+           "initial": "\uFCA4",
+           "medial": "\uFCE3"
+         },
+         "\u062A\u0649": {
+           "isolated": "\uFC0F",
+           "final": "\uFC74"
+         },
+         "\u062A\u064A": {
+           "isolated": "\uFC10",
+           "final": "\uFC75"
+         },
+         "\u062B\u062C": {
+           "isolated": "\uFC11"
+         },
+         "\u062B\u0645": {
+           "isolated": "\uFC12",
+           "final": "\uFC78",
+           "initial": "\uFCA6",
+           "medial": "\uFCE5"
+         },
+         "\u062B\u0649": {
+           "isolated": "\uFC13",
+           "final": "\uFC7A"
+         },
+         "\u062B\u0648": {
+           "isolated": "\uFC14"
+         },
+         "\u062C\u062D": {
+           "isolated": "\uFC15",
+           "initial": "\uFCA7"
+         },
+         "\u062C\u0645": {
+           "isolated": "\uFC16",
+           "initial": "\uFCA8"
+         },
+         "\u062D\u062C": {
+           "isolated": "\uFC17",
+           "initial": "\uFCA9"
+         },
+         "\u062D\u0645": {
+           "isolated": "\uFC18",
+           "initial": "\uFCAA"
+         },
+         "\u062E\u062C": {
+           "isolated": "\uFC19",
+           "initial": "\uFCAB"
+         },
+         "\u062E\u062D": {
+           "isolated": "\uFC1A"
+         },
+         "\u062E\u0645": {
+           "isolated": "\uFC1B",
+           "initial": "\uFCAC"
+         },
+         "\u0633\u062C": {
+           "isolated": "\uFC1C",
+           "initial": "\uFCAD",
+           "medial": "\uFD34"
+         },
+         "\u0633\u062D": {
+           "isolated": "\uFC1D",
+           "initial": "\uFCAE",
+           "medial": "\uFD35"
+         },
+         "\u0633\u062E": {
+           "isolated": "\uFC1E",
+           "initial": "\uFCAF",
+           "medial": "\uFD36"
+         },
+         "\u0633\u0645": {
+           "isolated": "\uFC1F",
+           "initial": "\uFCB0",
+           "medial": "\uFCE7"
+         },
+         "\u0635\u062D": {
+           "isolated": "\uFC20",
+           "initial": "\uFCB1"
+         },
+         "\u0635\u0645": {
+           "isolated": "\uFC21",
+           "initial": "\uFCB3"
+         },
+         "\u0636\u062C": {
+           "isolated": "\uFC22",
+           "initial": "\uFCB4"
+         },
+         "\u0636\u062D": {
+           "isolated": "\uFC23",
+           "initial": "\uFCB5"
+         },
+         "\u0636\u062E": {
+           "isolated": "\uFC24",
+           "initial": "\uFCB6"
+         },
+         "\u0636\u0645": {
+           "isolated": "\uFC25",
+           "initial": "\uFCB7"
+         },
+         "\u0637\u062D": {
+           "isolated": "\uFC26",
+           "initial": "\uFCB8"
+         },
+         "\u0637\u0645": {
+           "isolated": "\uFC27",
+           "initial": "\uFD33",
+           "medial": "\uFD3A"
+         },
+         "\u0638\u0645": {
+           "isolated": "\uFC28",
+           "initial": "\uFCB9",
+           "medial": "\uFD3B"
+         },
+         "\u0639\u062C": {
+           "isolated": "\uFC29",
+           "initial": "\uFCBA"
+         },
+         "\u0639\u0645": {
+           "isolated": "\uFC2A",
+           "initial": "\uFCBB"
+         },
+         "\u063A\u062C": {
+           "isolated": "\uFC2B",
+           "initial": "\uFCBC"
+         },
+         "\u063A\u0645": {
+           "isolated": "\uFC2C",
+           "initial": "\uFCBD"
+         },
+         "\u0641\u062C": {
+           "isolated": "\uFC2D",
+           "initial": "\uFCBE"
+         },
+         "\u0641\u062D": {
+           "isolated": "\uFC2E",
+           "initial": "\uFCBF"
+         },
+         "\u0641\u062E": {
+           "isolated": "\uFC2F",
+           "initial": "\uFCC0"
+         },
+         "\u0641\u0645": {
+           "isolated": "\uFC30",
+           "initial": "\uFCC1"
+         },
+         "\u0641\u0649": {
+           "isolated": "\uFC31",
+           "final": "\uFC7C"
+         },
+         "\u0641\u064A": {
+           "isolated": "\uFC32",
+           "final": "\uFC7D"
+         },
+         "\u0642\u062D": {
+           "isolated": "\uFC33",
+           "initial": "\uFCC2"
+         },
+         "\u0642\u0645": {
+           "isolated": "\uFC34",
+           "initial": "\uFCC3"
+         },
+         "\u0642\u0649": {
+           "isolated": "\uFC35",
+           "final": "\uFC7E"
+         },
+         "\u0642\u064A": {
+           "isolated": "\uFC36",
+           "final": "\uFC7F"
+         },
+         "\u0643\u0627": {
+           "isolated": "\uFC37",
+           "final": "\uFC80"
+         },
+         "\u0643\u062C": {
+           "isolated": "\uFC38",
+           "initial": "\uFCC4"
+         },
+         "\u0643\u062D": {
+           "isolated": "\uFC39",
+           "initial": "\uFCC5"
+         },
+         "\u0643\u062E": {
+           "isolated": "\uFC3A",
+           "initial": "\uFCC6"
+         },
+         "\u0643\u0644": {
+           "isolated": "\uFC3B",
+           "final": "\uFC81",
+           "initial": "\uFCC7",
+           "medial": "\uFCEB"
+         },
+         "\u0643\u0645": {
+           "isolated": "\uFC3C",
+           "final": "\uFC82",
+           "initial": "\uFCC8",
+           "medial": "\uFCEC"
+         },
+         "\u0643\u0649": {
+           "isolated": "\uFC3D",
+           "final": "\uFC83"
+         },
+         "\u0643\u064A": {
+           "isolated": "\uFC3E",
+           "final": "\uFC84"
+         },
+         "\u0644\u062C": {
+           "isolated": "\uFC3F",
+           "initial": "\uFCC9"
+         },
+         "\u0644\u062D": {
+           "isolated": "\uFC40",
+           "initial": "\uFCCA"
+         },
+         "\u0644\u062E": {
+           "isolated": "\uFC41",
+           "initial": "\uFCCB"
+         },
+         "\u0644\u0645": {
+           "isolated": "\uFC42",
+           "final": "\uFC85",
+           "initial": "\uFCCC",
+           "medial": "\uFCED"
+         },
+         "\u0644\u0649": {
+           "isolated": "\uFC43",
+           "final": "\uFC86"
+         },
+         "\u0644\u064A": {
+           "isolated": "\uFC44",
+           "final": "\uFC87"
+         },
+         "\u0645\u062C": {
+           "isolated": "\uFC45",
+           "initial": "\uFCCE"
+         },
+         "\u0645\u062D": {
+           "isolated": "\uFC46",
+           "initial": "\uFCCF"
+         },
+         "\u0645\u062E": {
+           "isolated": "\uFC47",
+           "initial": "\uFCD0"
+         },
+         "\u0645\u0645": {
+           "isolated": "\uFC48",
+           "final": "\uFC89",
+           "initial": "\uFCD1"
+         },
+         "\u0645\u0649": {
+           "isolated": "\uFC49"
+         },
+         "\u0645\u064A": {
+           "isolated": "\uFC4A"
+         },
+         "\u0646\u062C": {
+           "isolated": "\uFC4B",
+           "initial": "\uFCD2"
+         },
+         "\u0646\u062D": {
+           "isolated": "\uFC4C",
+           "initial": "\uFCD3"
+         },
+         "\u0646\u062E": {
+           "isolated": "\uFC4D",
+           "initial": "\uFCD4"
+         },
+         "\u0646\u0645": {
+           "isolated": "\uFC4E",
+           "final": "\uFC8C",
+           "initial": "\uFCD5",
+           "medial": "\uFCEE"
+         },
+         "\u0646\u0649": {
+           "isolated": "\uFC4F",
+           "final": "\uFC8E"
+         },
+         "\u0646\u064A": {
+           "isolated": "\uFC50",
+           "final": "\uFC8F"
+         },
+         "\u0647\u062C": {
+           "isolated": "\uFC51",
+           "initial": "\uFCD7"
+         },
+         "\u0647\u0645": {
+           "isolated": "\uFC52",
+           "initial": "\uFCD8"
+         },
+         "\u0647\u0649": {
+           "isolated": "\uFC53"
+         },
+         "\u0647\u064A": {
+           "isolated": "\uFC54"
+         },
+         "\u064A\u062C": {
+           "isolated": "\uFC55",
+           "initial": "\uFCDA"
+         },
+         "\u064A\u062D": {
+           "isolated": "\uFC56",
+           "initial": "\uFCDB"
+         },
+         "\u064A\u062E": {
+           "isolated": "\uFC57",
+           "initial": "\uFCDC"
+         },
+         "\u064A\u0645": {
+           "isolated": "\uFC58",
+           "final": "\uFC93",
+           "initial": "\uFCDD",
+           "medial": "\uFCF0"
+         },
+         "\u064A\u0649": {
+           "isolated": "\uFC59",
+           "final": "\uFC95"
+         },
+         "\u064A\u064A": {
+           "isolated": "\uFC5A",
+           "final": "\uFC96"
+         },
+         "\u0630\u0670": {
+           "isolated": "\uFC5B"
+         },
+         "\u0631\u0670": {
+           "isolated": "\uFC5C"
+         },
+         "\u0649\u0670": {
+           "isolated": "\uFC5D",
+           "final": "\uFC90"
+         },
+         "\u064C\u0651": {
+           "isolated": "\uFC5E"
+         },
+         "\u064D\u0651": {
+           "isolated": "\uFC5F"
+         },
+         "\u064E\u0651": {
+           "isolated": "\uFC60"
+         },
+         "\u064F\u0651": {
+           "isolated": "\uFC61"
+         },
+         "\u0650\u0651": {
+           "isolated": "\uFC62"
+         },
+         "\u0651\u0670": {
+           "isolated": "\uFC63"
+         },
+         "\u0626\u0631": {
+           "final": "\uFC64"
+         },
+         "\u0626\u0632": {
+           "final": "\uFC65"
+         },
+         "\u0626\u0646": {
+           "final": "\uFC67"
+         },
+         "\u0628\u0631": {
+           "final": "\uFC6A"
+         },
+         "\u0628\u0632": {
+           "final": "\uFC6B"
+         },
+         "\u0628\u0646": {
+           "final": "\uFC6D"
+         },
+         "\u062A\u0631": {
+           "final": "\uFC70"
+         },
+         "\u062A\u0632": {
+           "final": "\uFC71"
+         },
+         "\u062A\u0646": {
+           "final": "\uFC73"
+         },
+         "\u062B\u0631": {
+           "final": "\uFC76"
+         },
+         "\u062B\u0632": {
+           "final": "\uFC77"
+         },
+         "\u062B\u0646": {
+           "final": "\uFC79"
+         },
+         "\u062B\u064A": {
+           "final": "\uFC7B"
+         },
+         "\u0645\u0627": {
+           "final": "\uFC88"
+         },
+         "\u0646\u0631": {
+           "final": "\uFC8A"
+         },
+         "\u0646\u0632": {
+           "final": "\uFC8B"
+         },
+         "\u0646\u0646": {
+           "final": "\uFC8D"
+         },
+         "\u064A\u0631": {
+           "final": "\uFC91"
+         },
+         "\u064A\u0632": {
+           "final": "\uFC92"
+         },
+         "\u064A\u0646": {
+           "final": "\uFC94"
+         },
+         "\u0626\u062E": {
+           "initial": "\uFC99"
+         },
+         "\u0626\u0647": {
+           "initial": "\uFC9B",
+           "medial": "\uFCE0"
+         },
+         "\u0628\u0647": {
+           "initial": "\uFCA0",
+           "medial": "\uFCE2"
+         },
+         "\u062A\u0647": {
+           "initial": "\uFCA5",
+           "medial": "\uFCE4"
+         },
+         "\u0635\u062E": {
+           "initial": "\uFCB2"
+         },
+         "\u0644\u0647": {
+           "initial": "\uFCCD"
+         },
+         "\u0646\u0647": {
+           "initial": "\uFCD6",
+           "medial": "\uFCEF"
+         },
+         "\u0647\u0670": {
+           "initial": "\uFCD9"
+         },
+         "\u064A\u0647": {
+           "initial": "\uFCDE",
+           "medial": "\uFCF1"
+         },
+         "\u062B\u0647": {
+           "medial": "\uFCE6"
+         },
+         "\u0633\u0647": {
+           "medial": "\uFCE8",
+           "initial": "\uFD31"
+         },
+         "\u0634\u0645": {
+           "medial": "\uFCE9",
+           "isolated": "\uFD0C",
+           "final": "\uFD28",
+           "initial": "\uFD30"
+         },
+         "\u0634\u0647": {
+           "medial": "\uFCEA",
+           "initial": "\uFD32"
+         },
+         "\u0640\u064E\u0651": {
+           "medial": "\uFCF2"
+         },
+         "\u0640\u064F\u0651": {
+           "medial": "\uFCF3"
+         },
+         "\u0640\u0650\u0651": {
+           "medial": "\uFCF4"
+         },
+         "\u0637\u0649": {
+           "isolated": "\uFCF5",
+           "final": "\uFD11"
+         },
+         "\u0637\u064A": {
+           "isolated": "\uFCF6",
+           "final": "\uFD12"
+         },
+         "\u0639\u0649": {
+           "isolated": "\uFCF7",
+           "final": "\uFD13"
+         },
+         "\u0639\u064A": {
+           "isolated": "\uFCF8",
+           "final": "\uFD14"
+         },
+         "\u063A\u0649": {
+           "isolated": "\uFCF9",
+           "final": "\uFD15"
+         },
+         "\u063A\u064A": {
+           "isolated": "\uFCFA",
+           "final": "\uFD16"
+         },
+         "\u0633\u0649": {
+           "isolated": "\uFCFB"
+         },
+         "\u0633\u064A": {
+           "isolated": "\uFCFC",
+           "final": "\uFD18"
+         },
+         "\u0634\u0649": {
+           "isolated": "\uFCFD",
+           "final": "\uFD19"
+         },
+         "\u0634\u064A": {
+           "isolated": "\uFCFE",
+           "final": "\uFD1A"
+         },
+         "\u062D\u0649": {
+           "isolated": "\uFCFF",
+           "final": "\uFD1B"
+         },
+         "\u062D\u064A": {
+           "isolated": "\uFD00",
+           "final": "\uFD1C"
+         },
+         "\u062C\u0649": {
+           "isolated": "\uFD01",
+           "final": "\uFD1D"
+         },
+         "\u062C\u064A": {
+           "isolated": "\uFD02",
+           "final": "\uFD1E"
+         },
+         "\u062E\u0649": {
+           "isolated": "\uFD03",
+           "final": "\uFD1F"
+         },
+         "\u062E\u064A": {
+           "isolated": "\uFD04",
+           "final": "\uFD20"
+         },
+         "\u0635\u0649": {
+           "isolated": "\uFD05",
+           "final": "\uFD21"
+         },
+         "\u0635\u064A": {
+           "isolated": "\uFD06",
+           "final": "\uFD22"
+         },
+         "\u0636\u0649": {
+           "isolated": "\uFD07",
+           "final": "\uFD23"
+         },
+         "\u0636\u064A": {
+           "isolated": "\uFD08",
+           "final": "\uFD24"
+         },
+         "\u0634\u062C": {
+           "isolated": "\uFD09",
+           "final": "\uFD25",
+           "initial": "\uFD2D",
+           "medial": "\uFD37"
+         },
+         "\u0634\u062D": {
+           "isolated": "\uFD0A",
+           "final": "\uFD26",
+           "initial": "\uFD2E",
+           "medial": "\uFD38"
+         },
+         "\u0634\u062E": {
+           "isolated": "\uFD0B",
+           "final": "\uFD27",
+           "initial": "\uFD2F",
+           "medial": "\uFD39"
+         },
+         "\u0634\u0631": {
+           "isolated": "\uFD0D",
+           "final": "\uFD29"
+         },
+         "\u0633\u0631": {
+           "isolated": "\uFD0E",
+           "final": "\uFD2A"
+         },
+         "\u0635\u0631": {
+           "isolated": "\uFD0F",
+           "final": "\uFD2B"
+         },
+         "\u0636\u0631": {
+           "isolated": "\uFD10",
+           "final": "\uFD2C"
+         },
+         "\u0633\u0639": {
+           "final": "\uFD17"
+         },
+         "\u062A\u062C\u0645": {
+           "initial": "\uFD50"
+         },
+         "\u062A\u062D\u062C": {
+           "final": "\uFD51",
+           "initial": "\uFD52"
+         },
+         "\u062A\u062D\u0645": {
+           "initial": "\uFD53"
+         },
+         "\u062A\u062E\u0645": {
+           "initial": "\uFD54"
+         },
+         "\u062A\u0645\u062C": {
+           "initial": "\uFD55"
+         },
+         "\u062A\u0645\u062D": {
+           "initial": "\uFD56"
+         },
+         "\u062A\u0645\u062E": {
+           "initial": "\uFD57"
+         },
+         "\u062C\u0645\u062D": {
+           "final": "\uFD58",
+           "initial": "\uFD59"
+         },
+         "\u062D\u0645\u064A": {
+           "final": "\uFD5A"
+         },
+         "\u062D\u0645\u0649": {
+           "final": "\uFD5B"
+         },
+         "\u0633\u062D\u062C": {
+           "initial": "\uFD5C"
+         },
+         "\u0633\u062C\u062D": {
+           "initial": "\uFD5D"
+         },
+         "\u0633\u062C\u0649": {
+           "final": "\uFD5E"
+         },
+         "\u0633\u0645\u062D": {
+           "final": "\uFD5F",
+           "initial": "\uFD60"
+         },
+         "\u0633\u0645\u062C": {
+           "initial": "\uFD61"
+         },
+         "\u0633\u0645\u0645": {
+           "final": "\uFD62",
+           "initial": "\uFD63"
+         },
+         "\u0635\u062D\u062D": {
+           "final": "\uFD64",
+           "initial": "\uFD65"
+         },
+         "\u0635\u0645\u0645": {
+           "final": "\uFD66",
+           "initial": "\uFDC5"
+         },
+         "\u0634\u062D\u0645": {
+           "final": "\uFD67",
+           "initial": "\uFD68"
+         },
+         "\u0634\u062C\u064A": {
+           "final": "\uFD69"
+         },
+         "\u0634\u0645\u062E": {
+           "final": "\uFD6A",
+           "initial": "\uFD6B"
+         },
+         "\u0634\u0645\u0645": {
+           "final": "\uFD6C",
+           "initial": "\uFD6D"
+         },
+         "\u0636\u062D\u0649": {
+           "final": "\uFD6E"
+         },
+         "\u0636\u062E\u0645": {
+           "final": "\uFD6F",
+           "initial": "\uFD70"
+         },
+         "\u0636\u0645\u062D": {
+           "final": "\uFD71"
+         },
+         "\u0637\u0645\u062D": {
+           "initial": "\uFD72"
+         },
+         "\u0637\u0645\u0645": {
+           "initial": "\uFD73"
+         },
+         "\u0637\u0645\u064A": {
+           "final": "\uFD74"
+         },
+         "\u0639\u062C\u0645": {
+           "final": "\uFD75",
+           "initial": "\uFDC4"
+         },
+         "\u0639\u0645\u0645": {
+           "final": "\uFD76",
+           "initial": "\uFD77"
+         },
+         "\u0639\u0645\u0649": {
+           "final": "\uFD78"
+         },
+         "\u063A\u0645\u0645": {
+           "final": "\uFD79"
+         },
+         "\u063A\u0645\u064A": {
+           "final": "\uFD7A"
+         },
+         "\u063A\u0645\u0649": {
+           "final": "\uFD7B"
+         },
+         "\u0641\u062E\u0645": {
+           "final": "\uFD7C",
+           "initial": "\uFD7D"
+         },
+         "\u0642\u0645\u062D": {
+           "final": "\uFD7E",
+           "initial": "\uFDB4"
+         },
+         "\u0642\u0645\u0645": {
+           "final": "\uFD7F"
+         },
+         "\u0644\u062D\u0645": {
+           "final": "\uFD80",
+           "initial": "\uFDB5"
+         },
+         "\u0644\u062D\u064A": {
+           "final": "\uFD81"
+         },
+         "\u0644\u062D\u0649": {
+           "final": "\uFD82"
+         },
+         "\u0644\u062C\u062C": {
+           "initial": "\uFD83",
+           "final": "\uFD84"
+         },
+         "\u0644\u062E\u0645": {
+           "final": "\uFD85",
+           "initial": "\uFD86"
+         },
+         "\u0644\u0645\u062D": {
+           "final": "\uFD87",
+           "initial": "\uFD88"
+         },
+         "\u0645\u062D\u062C": {
+           "initial": "\uFD89"
+         },
+         "\u0645\u062D\u0645": {
+           "initial": "\uFD8A"
+         },
+         "\u0645\u062D\u064A": {
+           "final": "\uFD8B"
+         },
+         "\u0645\u062C\u062D": {
+           "initial": "\uFD8C"
+         },
+         "\u0645\u062C\u0645": {
+           "initial": "\uFD8D"
+         },
+         "\u0645\u062E\u062C": {
+           "initial": "\uFD8E"
+         },
+         "\u0645\u062E\u0645": {
+           "initial": "\uFD8F"
+         },
+         "\u0645\u062C\u062E": {
+           "initial": "\uFD92"
+         },
+         "\u0647\u0645\u062C": {
+           "initial": "\uFD93"
+         },
+         "\u0647\u0645\u0645": {
+           "initial": "\uFD94"
+         },
+         "\u0646\u062D\u0645": {
+           "initial": "\uFD95"
+         },
+         "\u0646\u062D\u0649": {
+           "final": "\uFD96"
+         },
+         "\u0646\u062C\u0645": {
+           "final": "\uFD97",
+           "initial": "\uFD98"
+         },
+         "\u0646\u062C\u0649": {
+           "final": "\uFD99"
+         },
+         "\u0646\u0645\u064A": {
+           "final": "\uFD9A"
+         },
+         "\u0646\u0645\u0649": {
+           "final": "\uFD9B"
+         },
+         "\u064A\u0645\u0645": {
+           "final": "\uFD9C",
+           "initial": "\uFD9D"
+         },
+         "\u0628\u062E\u064A": {
+           "final": "\uFD9E"
+         },
+         "\u062A\u062C\u064A": {
+           "final": "\uFD9F"
+         },
+         "\u062A\u062C\u0649": {
+           "final": "\uFDA0"
+         },
+         "\u062A\u062E\u064A": {
+           "final": "\uFDA1"
+         },
+         "\u062A\u062E\u0649": {
+           "final": "\uFDA2"
+         },
+         "\u062A\u0645\u064A": {
+           "final": "\uFDA3"
+         },
+         "\u062A\u0645\u0649": {
+           "final": "\uFDA4"
+         },
+         "\u062C\u0645\u064A": {
+           "final": "\uFDA5"
+         },
+         "\u062C\u062D\u0649": {
+           "final": "\uFDA6"
+         },
+         "\u062C\u0645\u0649": {
+           "final": "\uFDA7"
+         },
+         "\u0633\u062E\u0649": {
+           "final": "\uFDA8"
+         },
+         "\u0635\u062D\u064A": {
+           "final": "\uFDA9"
+         },
+         "\u0634\u062D\u064A": {
+           "final": "\uFDAA"
+         },
+         "\u0636\u062D\u064A": {
+           "final": "\uFDAB"
+         },
+         "\u0644\u062C\u064A": {
+           "final": "\uFDAC"
+         },
+         "\u0644\u0645\u064A": {
+           "final": "\uFDAD"
+         },
+         "\u064A\u062D\u064A": {
+           "final": "\uFDAE"
+         },
+         "\u064A\u062C\u064A": {
+           "final": "\uFDAF"
+         },
+         "\u064A\u0645\u064A": {
+           "final": "\uFDB0"
+         },
+         "\u0645\u0645\u064A": {
+           "final": "\uFDB1"
+         },
+         "\u0642\u0645\u064A": {
+           "final": "\uFDB2"
+         },
+         "\u0646\u062D\u064A": {
+           "final": "\uFDB3"
+         },
+         "\u0639\u0645\u064A": {
+           "final": "\uFDB6"
+         },
+         "\u0643\u0645\u064A": {
+           "final": "\uFDB7"
+         },
+         "\u0646\u062C\u062D": {
+           "initial": "\uFDB8",
+           "final": "\uFDBD"
+         },
+         "\u0645\u062E\u064A": {
+           "final": "\uFDB9"
+         },
+         "\u0644\u062C\u0645": {
+           "initial": "\uFDBA",
+           "final": "\uFDBC"
+         },
+         "\u0643\u0645\u0645": {
+           "final": "\uFDBB",
+           "initial": "\uFDC3"
+         },
+         "\u062C\u062D\u064A": {
+           "final": "\uFDBE"
+         },
+         "\u062D\u062C\u064A": {
+           "final": "\uFDBF"
+         },
+         "\u0645\u062C\u064A": {
+           "final": "\uFDC0"
+         },
+         "\u0641\u0645\u064A": {
+           "final": "\uFDC1"
+         },
+         "\u0628\u062D\u064A": {
+           "final": "\uFDC2"
+         },
+         "\u0633\u062E\u064A": {
+           "final": "\uFDC6"
+         },
+         "\u0646\u062C\u064A": {
+           "final": "\uFDC7"
+         },
+         "\u0644\u0622": {
+           "isolated": "\uFEF5",
+           "final": "\uFEF6"
+         },
+         "\u0644\u0623": {
+           "isolated": "\uFEF7",
+           "final": "\uFEF8"
+         },
+         "\u0644\u0625": {
+           "isolated": "\uFEF9",
+           "final": "\uFEFA"
+         },
+         "\u0644\u0627": {
+           "isolated": "\uFEFB",
+           "final": "\uFEFC"
+         },
+         "words": {
+           "\u0635\u0644\u06D2": "\uFDF0",
+           "\u0642\u0644\u06D2": "\uFDF1",
+           "\u0627\u0644\u0644\u0647": "\uFDF2",
+           "\u0627\u0643\u0628\u0631": "\uFDF3",
+           "\u0645\u062D\u0645\u062F": "\uFDF4",
+           "\u0635\u0644\u0639\u0645": "\uFDF5",
+           "\u0631\u0633\u0648\u0644": "\uFDF6",
+           "\u0639\u0644\u064A\u0647": "\uFDF7",
+           "\u0648\u0633\u0644\u0645": "\uFDF8",
+           "\u0635\u0644\u0649": "\uFDF9",
+           "\u0635\u0644\u0649\u0627\u0644\u0644\u0647\u0639\u0644\u064A\u0647\u0648\u0633\u0644\u0645": "\uFDFA",
+           "\u062C\u0644\u062C\u0644\u0627\u0644\u0647": "\uFDFB",
+           "\u0631\u06CC\u0627\u0644": "\uFDFC"
+         }
+       };
+       var _default$2 = ligatureReference;
+       var unicodeLigatures = /*#__PURE__*/Object.defineProperty({
+         "default": _default$2
+       }, '__esModule', {
+         value: true
        });
 
-       var unicodeLigatures = createCommonjsModule(function (module, exports) {
-
-         Object.defineProperty(exports, "__esModule", {
-           value: true
-         });
-         var ligatureReference = {
-           "\u0626\u0627": {
-             "isolated": "\uFBEA",
-             "final": "\uFBEB"
-           },
-           "\u0626\u06D5": {
-             "isolated": "\uFBEC",
-             "final": "\uFBED"
-           },
-           "\u0626\u0648": {
-             "isolated": "\uFBEE",
-             "final": "\uFBEF"
-           },
-           "\u0626\u06C7": {
-             "isolated": "\uFBF0",
-             "final": "\uFBF1"
-           },
-           "\u0626\u06C6": {
-             "isolated": "\uFBF2",
-             "final": "\uFBF3"
-           },
-           "\u0626\u06C8": {
-             "isolated": "\uFBF4",
-             "final": "\uFBF5"
-           },
-           "\u0626\u06D0": {
-             "isolated": "\uFBF6",
-             "final": "\uFBF7",
-             "initial": "\uFBF8"
-           },
-           "\u0626\u0649": {
-             "uighur_kirghiz": {
-               "isolated": "\uFBF9",
-               "final": "\uFBFA",
-               "initial": "\uFBFB"
-             },
-             "isolated": "\uFC03",
-             "final": "\uFC68"
-           },
-           "\u0626\u062C": {
-             "isolated": "\uFC00",
-             "initial": "\uFC97"
-           },
-           "\u0626\u062D": {
-             "isolated": "\uFC01",
-             "initial": "\uFC98"
-           },
-           "\u0626\u0645": {
-             "isolated": "\uFC02",
-             "final": "\uFC66",
-             "initial": "\uFC9A",
-             "medial": "\uFCDF"
-           },
-           "\u0626\u064A": {
-             "isolated": "\uFC04",
-             "final": "\uFC69"
-           },
-           "\u0628\u062C": {
-             "isolated": "\uFC05",
-             "initial": "\uFC9C"
-           },
-           "\u0628\u062D": {
-             "isolated": "\uFC06",
-             "initial": "\uFC9D"
-           },
-           "\u0628\u062E": {
-             "isolated": "\uFC07",
-             "initial": "\uFC9E"
-           },
-           "\u0628\u0645": {
-             "isolated": "\uFC08",
-             "final": "\uFC6C",
-             "initial": "\uFC9F",
-             "medial": "\uFCE1"
-           },
-           "\u0628\u0649": {
-             "isolated": "\uFC09",
-             "final": "\uFC6E"
-           },
-           "\u0628\u064A": {
-             "isolated": "\uFC0A",
-             "final": "\uFC6F"
-           },
-           "\u062A\u062C": {
-             "isolated": "\uFC0B",
-             "initial": "\uFCA1"
-           },
-           "\u062A\u062D": {
-             "isolated": "\uFC0C",
-             "initial": "\uFCA2"
-           },
-           "\u062A\u062E": {
-             "isolated": "\uFC0D",
-             "initial": "\uFCA3"
-           },
-           "\u062A\u0645": {
-             "isolated": "\uFC0E",
-             "final": "\uFC72",
-             "initial": "\uFCA4",
-             "medial": "\uFCE3"
-           },
-           "\u062A\u0649": {
-             "isolated": "\uFC0F",
-             "final": "\uFC74"
-           },
-           "\u062A\u064A": {
-             "isolated": "\uFC10",
-             "final": "\uFC75"
-           },
-           "\u062B\u062C": {
-             "isolated": "\uFC11"
-           },
-           "\u062B\u0645": {
-             "isolated": "\uFC12",
-             "final": "\uFC78",
-             "initial": "\uFCA6",
-             "medial": "\uFCE5"
-           },
-           "\u062B\u0649": {
-             "isolated": "\uFC13",
-             "final": "\uFC7A"
-           },
-           "\u062B\u0648": {
-             "isolated": "\uFC14"
-           },
-           "\u062C\u062D": {
-             "isolated": "\uFC15",
-             "initial": "\uFCA7"
-           },
-           "\u062C\u0645": {
-             "isolated": "\uFC16",
-             "initial": "\uFCA8"
-           },
-           "\u062D\u062C": {
-             "isolated": "\uFC17",
-             "initial": "\uFCA9"
-           },
-           "\u062D\u0645": {
-             "isolated": "\uFC18",
-             "initial": "\uFCAA"
-           },
-           "\u062E\u062C": {
-             "isolated": "\uFC19",
-             "initial": "\uFCAB"
-           },
-           "\u062E\u062D": {
-             "isolated": "\uFC1A"
-           },
-           "\u062E\u0645": {
-             "isolated": "\uFC1B",
-             "initial": "\uFCAC"
-           },
-           "\u0633\u062C": {
-             "isolated": "\uFC1C",
-             "initial": "\uFCAD",
-             "medial": "\uFD34"
-           },
-           "\u0633\u062D": {
-             "isolated": "\uFC1D",
-             "initial": "\uFCAE",
-             "medial": "\uFD35"
-           },
-           "\u0633\u062E": {
-             "isolated": "\uFC1E",
-             "initial": "\uFCAF",
-             "medial": "\uFD36"
-           },
-           "\u0633\u0645": {
-             "isolated": "\uFC1F",
-             "initial": "\uFCB0",
-             "medial": "\uFCE7"
-           },
-           "\u0635\u062D": {
-             "isolated": "\uFC20",
-             "initial": "\uFCB1"
-           },
-           "\u0635\u0645": {
-             "isolated": "\uFC21",
-             "initial": "\uFCB3"
-           },
-           "\u0636\u062C": {
-             "isolated": "\uFC22",
-             "initial": "\uFCB4"
-           },
-           "\u0636\u062D": {
-             "isolated": "\uFC23",
-             "initial": "\uFCB5"
-           },
-           "\u0636\u062E": {
-             "isolated": "\uFC24",
-             "initial": "\uFCB6"
-           },
-           "\u0636\u0645": {
-             "isolated": "\uFC25",
-             "initial": "\uFCB7"
-           },
-           "\u0637\u062D": {
-             "isolated": "\uFC26",
-             "initial": "\uFCB8"
-           },
-           "\u0637\u0645": {
-             "isolated": "\uFC27",
-             "initial": "\uFD33",
-             "medial": "\uFD3A"
-           },
-           "\u0638\u0645": {
-             "isolated": "\uFC28",
-             "initial": "\uFCB9",
-             "medial": "\uFD3B"
-           },
-           "\u0639\u062C": {
-             "isolated": "\uFC29",
-             "initial": "\uFCBA"
-           },
-           "\u0639\u0645": {
-             "isolated": "\uFC2A",
-             "initial": "\uFCBB"
-           },
-           "\u063A\u062C": {
-             "isolated": "\uFC2B",
-             "initial": "\uFCBC"
-           },
-           "\u063A\u0645": {
-             "isolated": "\uFC2C",
-             "initial": "\uFCBD"
-           },
-           "\u0641\u062C": {
-             "isolated": "\uFC2D",
-             "initial": "\uFCBE"
-           },
-           "\u0641\u062D": {
-             "isolated": "\uFC2E",
-             "initial": "\uFCBF"
-           },
-           "\u0641\u062E": {
-             "isolated": "\uFC2F",
-             "initial": "\uFCC0"
-           },
-           "\u0641\u0645": {
-             "isolated": "\uFC30",
-             "initial": "\uFCC1"
-           },
-           "\u0641\u0649": {
-             "isolated": "\uFC31",
-             "final": "\uFC7C"
-           },
-           "\u0641\u064A": {
-             "isolated": "\uFC32",
-             "final": "\uFC7D"
-           },
-           "\u0642\u062D": {
-             "isolated": "\uFC33",
-             "initial": "\uFCC2"
-           },
-           "\u0642\u0645": {
-             "isolated": "\uFC34",
-             "initial": "\uFCC3"
-           },
-           "\u0642\u0649": {
-             "isolated": "\uFC35",
-             "final": "\uFC7E"
-           },
-           "\u0642\u064A": {
-             "isolated": "\uFC36",
-             "final": "\uFC7F"
-           },
-           "\u0643\u0627": {
-             "isolated": "\uFC37",
-             "final": "\uFC80"
-           },
-           "\u0643\u062C": {
-             "isolated": "\uFC38",
-             "initial": "\uFCC4"
-           },
-           "\u0643\u062D": {
-             "isolated": "\uFC39",
-             "initial": "\uFCC5"
-           },
-           "\u0643\u062E": {
-             "isolated": "\uFC3A",
-             "initial": "\uFCC6"
-           },
-           "\u0643\u0644": {
-             "isolated": "\uFC3B",
-             "final": "\uFC81",
-             "initial": "\uFCC7",
-             "medial": "\uFCEB"
-           },
-           "\u0643\u0645": {
-             "isolated": "\uFC3C",
-             "final": "\uFC82",
-             "initial": "\uFCC8",
-             "medial": "\uFCEC"
-           },
-           "\u0643\u0649": {
-             "isolated": "\uFC3D",
-             "final": "\uFC83"
-           },
-           "\u0643\u064A": {
-             "isolated": "\uFC3E",
-             "final": "\uFC84"
-           },
-           "\u0644\u062C": {
-             "isolated": "\uFC3F",
-             "initial": "\uFCC9"
-           },
-           "\u0644\u062D": {
-             "isolated": "\uFC40",
-             "initial": "\uFCCA"
-           },
-           "\u0644\u062E": {
-             "isolated": "\uFC41",
-             "initial": "\uFCCB"
-           },
-           "\u0644\u0645": {
-             "isolated": "\uFC42",
-             "final": "\uFC85",
-             "initial": "\uFCCC",
-             "medial": "\uFCED"
-           },
-           "\u0644\u0649": {
-             "isolated": "\uFC43",
-             "final": "\uFC86"
-           },
-           "\u0644\u064A": {
-             "isolated": "\uFC44",
-             "final": "\uFC87"
-           },
-           "\u0645\u062C": {
-             "isolated": "\uFC45",
-             "initial": "\uFCCE"
-           },
-           "\u0645\u062D": {
-             "isolated": "\uFC46",
-             "initial": "\uFCCF"
-           },
-           "\u0645\u062E": {
-             "isolated": "\uFC47",
-             "initial": "\uFCD0"
-           },
-           "\u0645\u0645": {
-             "isolated": "\uFC48",
-             "final": "\uFC89",
-             "initial": "\uFCD1"
-           },
-           "\u0645\u0649": {
-             "isolated": "\uFC49"
-           },
-           "\u0645\u064A": {
-             "isolated": "\uFC4A"
-           },
-           "\u0646\u062C": {
-             "isolated": "\uFC4B",
-             "initial": "\uFCD2"
-           },
-           "\u0646\u062D": {
-             "isolated": "\uFC4C",
-             "initial": "\uFCD3"
-           },
-           "\u0646\u062E": {
-             "isolated": "\uFC4D",
-             "initial": "\uFCD4"
-           },
-           "\u0646\u0645": {
-             "isolated": "\uFC4E",
-             "final": "\uFC8C",
-             "initial": "\uFCD5",
-             "medial": "\uFCEE"
-           },
-           "\u0646\u0649": {
-             "isolated": "\uFC4F",
-             "final": "\uFC8E"
-           },
-           "\u0646\u064A": {
-             "isolated": "\uFC50",
-             "final": "\uFC8F"
-           },
-           "\u0647\u062C": {
-             "isolated": "\uFC51",
-             "initial": "\uFCD7"
-           },
-           "\u0647\u0645": {
-             "isolated": "\uFC52",
-             "initial": "\uFCD8"
-           },
-           "\u0647\u0649": {
-             "isolated": "\uFC53"
-           },
-           "\u0647\u064A": {
-             "isolated": "\uFC54"
-           },
-           "\u064A\u062C": {
-             "isolated": "\uFC55",
-             "initial": "\uFCDA"
-           },
-           "\u064A\u062D": {
-             "isolated": "\uFC56",
-             "initial": "\uFCDB"
-           },
-           "\u064A\u062E": {
-             "isolated": "\uFC57",
-             "initial": "\uFCDC"
-           },
-           "\u064A\u0645": {
-             "isolated": "\uFC58",
-             "final": "\uFC93",
-             "initial": "\uFCDD",
-             "medial": "\uFCF0"
-           },
-           "\u064A\u0649": {
-             "isolated": "\uFC59",
-             "final": "\uFC95"
-           },
-           "\u064A\u064A": {
-             "isolated": "\uFC5A",
-             "final": "\uFC96"
-           },
-           "\u0630\u0670": {
-             "isolated": "\uFC5B"
-           },
-           "\u0631\u0670": {
-             "isolated": "\uFC5C"
-           },
-           "\u0649\u0670": {
-             "isolated": "\uFC5D",
-             "final": "\uFC90"
-           },
-           "\u064C\u0651": {
-             "isolated": "\uFC5E"
-           },
-           "\u064D\u0651": {
-             "isolated": "\uFC5F"
-           },
-           "\u064E\u0651": {
-             "isolated": "\uFC60"
-           },
-           "\u064F\u0651": {
-             "isolated": "\uFC61"
-           },
-           "\u0650\u0651": {
-             "isolated": "\uFC62"
-           },
-           "\u0651\u0670": {
-             "isolated": "\uFC63"
-           },
-           "\u0626\u0631": {
-             "final": "\uFC64"
-           },
-           "\u0626\u0632": {
-             "final": "\uFC65"
-           },
-           "\u0626\u0646": {
-             "final": "\uFC67"
-           },
-           "\u0628\u0631": {
-             "final": "\uFC6A"
-           },
-           "\u0628\u0632": {
-             "final": "\uFC6B"
-           },
-           "\u0628\u0646": {
-             "final": "\uFC6D"
-           },
-           "\u062A\u0631": {
-             "final": "\uFC70"
-           },
-           "\u062A\u0632": {
-             "final": "\uFC71"
-           },
-           "\u062A\u0646": {
-             "final": "\uFC73"
-           },
-           "\u062B\u0631": {
-             "final": "\uFC76"
-           },
-           "\u062B\u0632": {
-             "final": "\uFC77"
-           },
-           "\u062B\u0646": {
-             "final": "\uFC79"
-           },
-           "\u062B\u064A": {
-             "final": "\uFC7B"
-           },
-           "\u0645\u0627": {
-             "final": "\uFC88"
-           },
-           "\u0646\u0631": {
-             "final": "\uFC8A"
-           },
-           "\u0646\u0632": {
-             "final": "\uFC8B"
-           },
-           "\u0646\u0646": {
-             "final": "\uFC8D"
-           },
-           "\u064A\u0631": {
-             "final": "\uFC91"
-           },
-           "\u064A\u0632": {
-             "final": "\uFC92"
-           },
-           "\u064A\u0646": {
-             "final": "\uFC94"
-           },
-           "\u0626\u062E": {
-             "initial": "\uFC99"
-           },
-           "\u0626\u0647": {
-             "initial": "\uFC9B",
-             "medial": "\uFCE0"
-           },
-           "\u0628\u0647": {
-             "initial": "\uFCA0",
-             "medial": "\uFCE2"
-           },
-           "\u062A\u0647": {
-             "initial": "\uFCA5",
-             "medial": "\uFCE4"
-           },
-           "\u0635\u062E": {
-             "initial": "\uFCB2"
-           },
-           "\u0644\u0647": {
-             "initial": "\uFCCD"
-           },
-           "\u0646\u0647": {
-             "initial": "\uFCD6",
-             "medial": "\uFCEF"
-           },
-           "\u0647\u0670": {
-             "initial": "\uFCD9"
-           },
-           "\u064A\u0647": {
-             "initial": "\uFCDE",
-             "medial": "\uFCF1"
-           },
-           "\u062B\u0647": {
-             "medial": "\uFCE6"
-           },
-           "\u0633\u0647": {
-             "medial": "\uFCE8",
-             "initial": "\uFD31"
-           },
-           "\u0634\u0645": {
-             "medial": "\uFCE9",
-             "isolated": "\uFD0C",
-             "final": "\uFD28",
-             "initial": "\uFD30"
-           },
-           "\u0634\u0647": {
-             "medial": "\uFCEA",
-             "initial": "\uFD32"
-           },
-           "\u0640\u064E\u0651": {
-             "medial": "\uFCF2"
-           },
-           "\u0640\u064F\u0651": {
-             "medial": "\uFCF3"
-           },
-           "\u0640\u0650\u0651": {
-             "medial": "\uFCF4"
-           },
-           "\u0637\u0649": {
-             "isolated": "\uFCF5",
-             "final": "\uFD11"
-           },
-           "\u0637\u064A": {
-             "isolated": "\uFCF6",
-             "final": "\uFD12"
-           },
-           "\u0639\u0649": {
-             "isolated": "\uFCF7",
-             "final": "\uFD13"
-           },
-           "\u0639\u064A": {
-             "isolated": "\uFCF8",
-             "final": "\uFD14"
-           },
-           "\u063A\u0649": {
-             "isolated": "\uFCF9",
-             "final": "\uFD15"
-           },
-           "\u063A\u064A": {
-             "isolated": "\uFCFA",
-             "final": "\uFD16"
-           },
-           "\u0633\u0649": {
-             "isolated": "\uFCFB"
-           },
-           "\u0633\u064A": {
-             "isolated": "\uFCFC",
-             "final": "\uFD18"
-           },
-           "\u0634\u0649": {
-             "isolated": "\uFCFD",
-             "final": "\uFD19"
-           },
-           "\u0634\u064A": {
-             "isolated": "\uFCFE",
-             "final": "\uFD1A"
-           },
-           "\u062D\u0649": {
-             "isolated": "\uFCFF",
-             "final": "\uFD1B"
-           },
-           "\u062D\u064A": {
-             "isolated": "\uFD00",
-             "final": "\uFD1C"
-           },
-           "\u062C\u0649": {
-             "isolated": "\uFD01",
-             "final": "\uFD1D"
-           },
-           "\u062C\u064A": {
-             "isolated": "\uFD02",
-             "final": "\uFD1E"
-           },
-           "\u062E\u0649": {
-             "isolated": "\uFD03",
-             "final": "\uFD1F"
-           },
-           "\u062E\u064A": {
-             "isolated": "\uFD04",
-             "final": "\uFD20"
-           },
-           "\u0635\u0649": {
-             "isolated": "\uFD05",
-             "final": "\uFD21"
-           },
-           "\u0635\u064A": {
-             "isolated": "\uFD06",
-             "final": "\uFD22"
-           },
-           "\u0636\u0649": {
-             "isolated": "\uFD07",
-             "final": "\uFD23"
-           },
-           "\u0636\u064A": {
-             "isolated": "\uFD08",
-             "final": "\uFD24"
-           },
-           "\u0634\u062C": {
-             "isolated": "\uFD09",
-             "final": "\uFD25",
-             "initial": "\uFD2D",
-             "medial": "\uFD37"
-           },
-           "\u0634\u062D": {
-             "isolated": "\uFD0A",
-             "final": "\uFD26",
-             "initial": "\uFD2E",
-             "medial": "\uFD38"
-           },
-           "\u0634\u062E": {
-             "isolated": "\uFD0B",
-             "final": "\uFD27",
-             "initial": "\uFD2F",
-             "medial": "\uFD39"
-           },
-           "\u0634\u0631": {
-             "isolated": "\uFD0D",
-             "final": "\uFD29"
-           },
-           "\u0633\u0631": {
-             "isolated": "\uFD0E",
-             "final": "\uFD2A"
-           },
-           "\u0635\u0631": {
-             "isolated": "\uFD0F",
-             "final": "\uFD2B"
-           },
-           "\u0636\u0631": {
-             "isolated": "\uFD10",
-             "final": "\uFD2C"
-           },
-           "\u0633\u0639": {
-             "final": "\uFD17"
-           },
-           "\u062A\u062C\u0645": {
-             "initial": "\uFD50"
-           },
-           "\u062A\u062D\u062C": {
-             "final": "\uFD51",
-             "initial": "\uFD52"
-           },
-           "\u062A\u062D\u0645": {
-             "initial": "\uFD53"
-           },
-           "\u062A\u062E\u0645": {
-             "initial": "\uFD54"
-           },
-           "\u062A\u0645\u062C": {
-             "initial": "\uFD55"
-           },
-           "\u062A\u0645\u062D": {
-             "initial": "\uFD56"
-           },
-           "\u062A\u0645\u062E": {
-             "initial": "\uFD57"
-           },
-           "\u062C\u0645\u062D": {
-             "final": "\uFD58",
-             "initial": "\uFD59"
-           },
-           "\u062D\u0645\u064A": {
-             "final": "\uFD5A"
-           },
-           "\u062D\u0645\u0649": {
-             "final": "\uFD5B"
-           },
-           "\u0633\u062D\u062C": {
-             "initial": "\uFD5C"
-           },
-           "\u0633\u062C\u062D": {
-             "initial": "\uFD5D"
-           },
-           "\u0633\u062C\u0649": {
-             "final": "\uFD5E"
-           },
-           "\u0633\u0645\u062D": {
-             "final": "\uFD5F",
-             "initial": "\uFD60"
-           },
-           "\u0633\u0645\u062C": {
-             "initial": "\uFD61"
-           },
-           "\u0633\u0645\u0645": {
-             "final": "\uFD62",
-             "initial": "\uFD63"
-           },
-           "\u0635\u062D\u062D": {
-             "final": "\uFD64",
-             "initial": "\uFD65"
-           },
-           "\u0635\u0645\u0645": {
-             "final": "\uFD66",
-             "initial": "\uFDC5"
-           },
-           "\u0634\u062D\u0645": {
-             "final": "\uFD67",
-             "initial": "\uFD68"
-           },
-           "\u0634\u062C\u064A": {
-             "final": "\uFD69"
-           },
-           "\u0634\u0645\u062E": {
-             "final": "\uFD6A",
-             "initial": "\uFD6B"
-           },
-           "\u0634\u0645\u0645": {
-             "final": "\uFD6C",
-             "initial": "\uFD6D"
-           },
-           "\u0636\u062D\u0649": {
-             "final": "\uFD6E"
-           },
-           "\u0636\u062E\u0645": {
-             "final": "\uFD6F",
-             "initial": "\uFD70"
-           },
-           "\u0636\u0645\u062D": {
-             "final": "\uFD71"
-           },
-           "\u0637\u0645\u062D": {
-             "initial": "\uFD72"
-           },
-           "\u0637\u0645\u0645": {
-             "initial": "\uFD73"
-           },
-           "\u0637\u0645\u064A": {
-             "final": "\uFD74"
-           },
-           "\u0639\u062C\u0645": {
-             "final": "\uFD75",
-             "initial": "\uFDC4"
-           },
-           "\u0639\u0645\u0645": {
-             "final": "\uFD76",
-             "initial": "\uFD77"
-           },
-           "\u0639\u0645\u0649": {
-             "final": "\uFD78"
-           },
-           "\u063A\u0645\u0645": {
-             "final": "\uFD79"
-           },
-           "\u063A\u0645\u064A": {
-             "final": "\uFD7A"
-           },
-           "\u063A\u0645\u0649": {
-             "final": "\uFD7B"
-           },
-           "\u0641\u062E\u0645": {
-             "final": "\uFD7C",
-             "initial": "\uFD7D"
-           },
-           "\u0642\u0645\u062D": {
-             "final": "\uFD7E",
-             "initial": "\uFDB4"
-           },
-           "\u0642\u0645\u0645": {
-             "final": "\uFD7F"
-           },
-           "\u0644\u062D\u0645": {
-             "final": "\uFD80",
-             "initial": "\uFDB5"
-           },
-           "\u0644\u062D\u064A": {
-             "final": "\uFD81"
-           },
-           "\u0644\u062D\u0649": {
-             "final": "\uFD82"
-           },
-           "\u0644\u062C\u062C": {
-             "initial": "\uFD83",
-             "final": "\uFD84"
-           },
-           "\u0644\u062E\u0645": {
-             "final": "\uFD85",
-             "initial": "\uFD86"
-           },
-           "\u0644\u0645\u062D": {
-             "final": "\uFD87",
-             "initial": "\uFD88"
-           },
-           "\u0645\u062D\u062C": {
-             "initial": "\uFD89"
-           },
-           "\u0645\u062D\u0645": {
-             "initial": "\uFD8A"
-           },
-           "\u0645\u062D\u064A": {
-             "final": "\uFD8B"
-           },
-           "\u0645\u062C\u062D": {
-             "initial": "\uFD8C"
-           },
-           "\u0645\u062C\u0645": {
-             "initial": "\uFD8D"
-           },
-           "\u0645\u062E\u062C": {
-             "initial": "\uFD8E"
-           },
-           "\u0645\u062E\u0645": {
-             "initial": "\uFD8F"
-           },
-           "\u0645\u062C\u062E": {
-             "initial": "\uFD92"
-           },
-           "\u0647\u0645\u062C": {
-             "initial": "\uFD93"
-           },
-           "\u0647\u0645\u0645": {
-             "initial": "\uFD94"
-           },
-           "\u0646\u062D\u0645": {
-             "initial": "\uFD95"
-           },
-           "\u0646\u062D\u0649": {
-             "final": "\uFD96"
-           },
-           "\u0646\u062C\u0645": {
-             "final": "\uFD97",
-             "initial": "\uFD98"
-           },
-           "\u0646\u062C\u0649": {
-             "final": "\uFD99"
-           },
-           "\u0646\u0645\u064A": {
-             "final": "\uFD9A"
-           },
-           "\u0646\u0645\u0649": {
-             "final": "\uFD9B"
-           },
-           "\u064A\u0645\u0645": {
-             "final": "\uFD9C",
-             "initial": "\uFD9D"
-           },
-           "\u0628\u062E\u064A": {
-             "final": "\uFD9E"
-           },
-           "\u062A\u062C\u064A": {
-             "final": "\uFD9F"
-           },
-           "\u062A\u062C\u0649": {
-             "final": "\uFDA0"
-           },
-           "\u062A\u062E\u064A": {
-             "final": "\uFDA1"
-           },
-           "\u062A\u062E\u0649": {
-             "final": "\uFDA2"
-           },
-           "\u062A\u0645\u064A": {
-             "final": "\uFDA3"
-           },
-           "\u062A\u0645\u0649": {
-             "final": "\uFDA4"
-           },
-           "\u062C\u0645\u064A": {
-             "final": "\uFDA5"
-           },
-           "\u062C\u062D\u0649": {
-             "final": "\uFDA6"
-           },
-           "\u062C\u0645\u0649": {
-             "final": "\uFDA7"
-           },
-           "\u0633\u062E\u0649": {
-             "final": "\uFDA8"
-           },
-           "\u0635\u062D\u064A": {
-             "final": "\uFDA9"
-           },
-           "\u0634\u062D\u064A": {
-             "final": "\uFDAA"
-           },
-           "\u0636\u062D\u064A": {
-             "final": "\uFDAB"
-           },
-           "\u0644\u062C\u064A": {
-             "final": "\uFDAC"
-           },
-           "\u0644\u0645\u064A": {
-             "final": "\uFDAD"
-           },
-           "\u064A\u062D\u064A": {
-             "final": "\uFDAE"
-           },
-           "\u064A\u062C\u064A": {
-             "final": "\uFDAF"
-           },
-           "\u064A\u0645\u064A": {
-             "final": "\uFDB0"
-           },
-           "\u0645\u0645\u064A": {
-             "final": "\uFDB1"
-           },
-           "\u0642\u0645\u064A": {
-             "final": "\uFDB2"
-           },
-           "\u0646\u062D\u064A": {
-             "final": "\uFDB3"
-           },
-           "\u0639\u0645\u064A": {
-             "final": "\uFDB6"
-           },
-           "\u0643\u0645\u064A": {
-             "final": "\uFDB7"
-           },
-           "\u0646\u062C\u062D": {
-             "initial": "\uFDB8",
-             "final": "\uFDBD"
-           },
-           "\u0645\u062E\u064A": {
-             "final": "\uFDB9"
-           },
-           "\u0644\u062C\u0645": {
-             "initial": "\uFDBA",
-             "final": "\uFDBC"
-           },
-           "\u0643\u0645\u0645": {
-             "final": "\uFDBB",
-             "initial": "\uFDC3"
-           },
-           "\u062C\u062D\u064A": {
-             "final": "\uFDBE"
-           },
-           "\u062D\u062C\u064A": {
-             "final": "\uFDBF"
-           },
-           "\u0645\u062C\u064A": {
-             "final": "\uFDC0"
-           },
-           "\u0641\u0645\u064A": {
-             "final": "\uFDC1"
-           },
-           "\u0628\u062D\u064A": {
-             "final": "\uFDC2"
-           },
-           "\u0633\u062E\u064A": {
-             "final": "\uFDC6"
-           },
-           "\u0646\u062C\u064A": {
-             "final": "\uFDC7"
-           },
-           "\u0644\u0622": {
-             "isolated": "\uFEF5",
-             "final": "\uFEF6"
-           },
-           "\u0644\u0623": {
-             "isolated": "\uFEF7",
-             "final": "\uFEF8"
-           },
-           "\u0644\u0625": {
-             "isolated": "\uFEF9",
-             "final": "\uFEFA"
-           },
-           "\u0644\u0627": {
-             "isolated": "\uFEFB",
-             "final": "\uFEFC"
-           },
-           "words": {
-             "\u0635\u0644\u06D2": "\uFDF0",
-             "\u0642\u0644\u06D2": "\uFDF1",
-             "\u0627\u0644\u0644\u0647": "\uFDF2",
-             "\u0627\u0643\u0628\u0631": "\uFDF3",
-             "\u0645\u062D\u0645\u062F": "\uFDF4",
-             "\u0635\u0644\u0639\u0645": "\uFDF5",
-             "\u0631\u0633\u0648\u0644": "\uFDF6",
-             "\u0639\u0644\u064A\u0647": "\uFDF7",
-             "\u0648\u0633\u0644\u0645": "\uFDF8",
-             "\u0635\u0644\u0649": "\uFDF9",
-             "\u0635\u0644\u0649\u0627\u0644\u0644\u0647\u0639\u0644\u064A\u0647\u0648\u0633\u0644\u0645": "\uFDFA",
-             "\u062C\u0644\u062C\u0644\u0627\u0644\u0647": "\uFDFB",
-             "\u0631\u06CC\u0627\u0644": "\uFDFC"
-           }
-         };
-         exports["default"] = ligatureReference;
-       });
-
-       var reference = createCommonjsModule(function (module, exports) {
+       var reference = createCommonjsModule(function (module, exports) {
 
          Object.defineProperty(exports, "__esModule", {
            value: true
          addToLineBreakers(0x1EE00, 0x1EEFF);
        });
 
-       var GlyphSplitter_1 = createCommonjsModule(function (module, exports) {
-
-         Object.defineProperty(exports, "__esModule", {
-           value: true
-         });
-
-         function GlyphSplitter(word) {
-           var letters = [];
-           var lastLetter = '';
-           word.split('').forEach(function (letter) {
-             if (isArabic_1.isArabic(letter)) {
-               if (reference.tashkeel.indexOf(letter) > -1) {
-                 letters[letters.length - 1] += letter;
-               } else if (lastLetter.length && (reference.lams.indexOf(lastLetter) === 0 && reference.alefs.indexOf(letter) > -1 || reference.lams.indexOf(lastLetter) > 0 && reference.alefs.indexOf(letter) === 0)) {
-                 // valid LA forms
-                 letters[letters.length - 1] += letter;
-               } else {
-                 letters.push(letter);
-               }
+       function GlyphSplitter(word) {
+         var letters = [];
+         var lastLetter = '';
+         word.split('').forEach(function (letter) {
+           if (isArabic_1.isArabic(letter)) {
+             if (reference.tashkeel.indexOf(letter) > -1) {
+               letters[letters.length - 1] += letter;
+             } else if (lastLetter.length && (reference.lams.indexOf(lastLetter) === 0 && reference.alefs.indexOf(letter) > -1 || reference.lams.indexOf(lastLetter) > 0 && reference.alefs.indexOf(letter) === 0)) {
+               // valid LA forms
+               letters[letters.length - 1] += letter;
              } else {
                letters.push(letter);
              }
+           } else {
+             letters.push(letter);
+           }
 
-             if (reference.tashkeel.indexOf(letter) === -1) {
-               lastLetter = letter;
-             }
-           });
-           return letters;
-         }
+           if (reference.tashkeel.indexOf(letter) === -1) {
+             lastLetter = letter;
+           }
+         });
+         return letters;
+       }
 
-         exports.GlyphSplitter = GlyphSplitter;
+       var GlyphSplitter_2 = GlyphSplitter;
+       var GlyphSplitter_1 = /*#__PURE__*/Object.defineProperty({
+         GlyphSplitter: GlyphSplitter_2
+       }, '__esModule', {
+         value: true
        });
 
-       var BaselineSplitter_1 = createCommonjsModule(function (module, exports) {
-
-         Object.defineProperty(exports, "__esModule", {
-           value: true
-         });
-
-         function BaselineSplitter(word) {
-           var letters = [];
-           var lastLetter = '';
-           word.split('').forEach(function (letter) {
-             if (isArabic_1.isArabic(letter) && isArabic_1.isArabic(lastLetter)) {
-               if (lastLetter.length && reference.tashkeel.indexOf(letter) > -1) {
-                 letters[letters.length - 1] += letter;
-               } else if (reference.lineBreakers.indexOf(lastLetter) > -1) {
-                 letters.push(letter);
-               } else {
-                 letters[letters.length - 1] += letter;
-               }
-             } else {
+       function BaselineSplitter(word) {
+         var letters = [];
+         var lastLetter = '';
+         word.split('').forEach(function (letter) {
+           if (isArabic_1.isArabic(letter) && isArabic_1.isArabic(lastLetter)) {
+             if (lastLetter.length && reference.tashkeel.indexOf(letter) > -1) {
+               letters[letters.length - 1] += letter;
+             } else if (reference.lineBreakers.indexOf(lastLetter) > -1) {
                letters.push(letter);
+             } else {
+               letters[letters.length - 1] += letter;
              }
+           } else {
+             letters.push(letter);
+           }
 
-             if (reference.tashkeel.indexOf(letter) === -1) {
-               // don't allow tashkeel to hide line break
-               lastLetter = letter;
-             }
-           });
-           return letters;
-         }
+           if (reference.tashkeel.indexOf(letter) === -1) {
+             // don't allow tashkeel to hide line break
+             lastLetter = letter;
+           }
+         });
+         return letters;
+       }
 
-         exports.BaselineSplitter = BaselineSplitter;
+       var BaselineSplitter_2 = BaselineSplitter;
+       var BaselineSplitter_1 = /*#__PURE__*/Object.defineProperty({
+         BaselineSplitter: BaselineSplitter_2
+       }, '__esModule', {
+         value: true
        });
 
-       var Normalization = createCommonjsModule(function (module, exports) {
-
-         Object.defineProperty(exports, "__esModule", {
-           value: true
-         });
+       function Normal(word, breakPresentationForm) {
+         // default is to turn initial/isolated/medial/final presentation form to generic
+         if (typeof breakPresentationForm === 'undefined') {
+           breakPresentationForm = true;
+         }
 
-         function Normal(word, breakPresentationForm) {
-           // default is to turn initial/isolated/medial/final presentation form to generic
-           if (typeof breakPresentationForm === 'undefined') {
-             breakPresentationForm = true;
+         var returnable = '';
+         word.split('').forEach(function (letter) {
+           if (!isArabic_1.isArabic(letter)) {
+             returnable += letter;
+             return;
            }
 
-           var returnable = '';
-           word.split('').forEach(function (letter) {
-             if (!isArabic_1.isArabic(letter)) {
-               returnable += letter;
-               return;
-             }
-
-             for (var w = 0; w < reference.letterList.length; w++) {
-               // ok so we are checking this potential lettertron
-               var letterForms = unicodeArabic["default"][reference.letterList[w]];
-               var versions = Object.keys(letterForms);
+           for (var 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]];
+             for (var v = 0; v < versions.length; v++) {
+               var localVersion = letterForms[versions[v]];
 
-                 if (_typeof(localVersion) === 'object' && typeof localVersion.indexOf === 'undefined') {
-                   // look at this embedded object
-                   var embeddedForms = Object.keys(localVersion);
+               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]];
+                 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'];
-                           }
+                   if (form === letter || _typeof(form) === 'object' && form.indexOf && form.indexOf(letter) > -1) {
+                     // match
+                     // console.log('embedded match');
+                     if (form === letter) {
+                       // match exact
+                       if (breakPresentationForm && localVersion['normal'] && ['isolated', 'initial', 'medial', 'final'].indexOf(embeddedForms[ef]) > -1) {
+                         // replace presentation form
+                         // console.log('keeping normal form of the letter');
+                         if (_typeof(localVersion['normal']) === 'object') {
+                           returnable += localVersion['normal'][0];
+                         } else {
+                           returnable += localVersion['normal'];
+                         }
 
-                           return;
-                         } // console.log('keeping this letter');
+                         return;
+                       } // console.log('keeping this letter');
 
 
-                         returnable += letter;
-                         return;
-                       } else if (_typeof(form) === 'object' && form.indexOf && form.indexOf(letter) > -1) {
-                         // match
-                         returnable += form[0]; // console.log('added the first letter from the same array');
+                       returnable += letter;
+                       return;
+                     } else if (_typeof(form) === 'object' && form.indexOf && form.indexOf(letter) > -1) {
+                       // match
+                       returnable += form[0]; // console.log('added the first letter from the same array');
 
-                         return;
-                       }
+                       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'];
-                     }
+                 }
+               } 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');
+                   return;
+                 } // console.log('keeping this letter');
 
 
-                   returnable += letter;
-                   return;
-                 } else if (_typeof(localVersion) === 'object' && localVersion.indexOf && localVersion.indexOf(letter) > -1) {
-                   // match
-                   returnable += localVersion[0]; // console.log('added the first letter from the same array');
+                 returnable += letter;
+                 return;
+               } else if (_typeof(localVersion) === 'object' && localVersion.indexOf && localVersion.indexOf(letter) > -1) {
+                 // match
+                 returnable += localVersion[0]; // console.log('added the first letter from the same array');
 
-                   return;
-                 }
+                 return;
                }
-             } // try ligatures
+             }
+           } // try ligatures
 
 
-             for (var v2 = 0; v2 < reference.ligatureList.length; v2++) {
-               var normalForm = reference.ligatureList[v2];
+           for (var v2 = 0; v2 < reference.ligatureList.length; v2++) {
+             var normalForm = reference.ligatureList[v2];
 
-               if (normalForm !== 'words') {
-                 var ligForms = Object.keys(unicodeLigatures["default"][normalForm]);
+             if (normalForm !== 'words') {
+               var ligForms = Object.keys(unicodeLigatures["default"][normalForm]);
 
-                 for (var f = 0; f < ligForms.length; f++) {
-                   if (unicodeLigatures["default"][normalForm][ligForms[f]] === letter) {
-                     returnable += normalForm;
-                     return;
-                   }
+               for (var f = 0; f < ligForms.length; f++) {
+                 if (unicodeLigatures["default"][normalForm][ligForms[f]] === letter) {
+                   returnable += normalForm;
+                   return;
                  }
                }
-             } // try words ligatures
+             }
+           } // try words ligatures
 
 
-             for (var v3 = 0; v3 < reference.ligatureWordList.length; v3++) {
-               var _normalForm = reference.ligatureWordList[v3];
+           for (var v3 = 0; v3 < reference.ligatureWordList.length; v3++) {
+             var _normalForm = reference.ligatureWordList[v3];
 
-               if (unicodeLigatures["default"].words[_normalForm] === letter) {
-                 returnable += _normalForm;
-                 return;
-               }
+             if (unicodeLigatures["default"].words[_normalForm] === letter) {
+               returnable += _normalForm;
+               return;
              }
+           }
 
-             returnable += letter; // console.log('kept the letter')
-           });
-           return returnable;
-         }
+           returnable += letter; // console.log('kept the letter')
+         });
+         return returnable;
+       }
 
-         exports.Normal = Normal;
+       var Normal_1 = Normal;
+       var Normalization = /*#__PURE__*/Object.defineProperty({
+         Normal: Normal_1
+       }, '__esModule', {
+         value: true
        });
 
-       var CharShaper_1 = createCommonjsModule(function (module, exports) {
-
-         Object.defineProperty(exports, "__esModule", {
-           value: true
-         });
+       function CharShaper(letter, form) {
+         if (!isArabic_1.isArabic(letter)) {
+           // fail not Arabic
+           throw new Error('Not Arabic');
+         }
 
-         function CharShaper(letter, form) {
-           if (!isArabic_1.isArabic(letter)) {
-             // fail not Arabic
-             throw new Error('Not Arabic');
-           }
+         if (letter === "\u0621") {
+           // hamza alone
+           return "\u0621";
+         }
 
-           if (letter === "\u0621") {
-             // hamza alone
-             return "\u0621";
-           }
+         for (var w = 0; w < reference.letterList.length; w++) {
+           // ok so we are checking this potential lettertron
+           var letterForms = unicodeArabic["default"][reference.letterList[w]];
+           var versions = Object.keys(letterForms);
 
-           for (var 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]];
 
-             for (var v = 0; v < versions.length; v++) {
-               var localVersion = letterForms[versions[v]];
+             if (localVersion === letter || _typeof(localVersion) === 'object' && localVersion.indexOf && localVersion.indexOf(letter) > -1) {
+               if (versions.indexOf(form) > -1) {
+                 return letterForms[form];
+               }
+             } else if (_typeof(localVersion) === 'object' && typeof localVersion.indexOf === 'undefined') {
+               // check embedded
+               var embeddedVersions = Object.keys(localVersion);
 
-               if (localVersion === letter || _typeof(localVersion) === 'object' && localVersion.indexOf && localVersion.indexOf(letter) > -1) {
-                 if (versions.indexOf(form) > -1) {
-                   return letterForms[form];
-                 }
-               } else if (_typeof(localVersion) === 'object' && typeof localVersion.indexOf === 'undefined') {
-                 // check embedded
-                 var embeddedVersions = Object.keys(localVersion);
-
-                 for (var ev = 0; ev < embeddedVersions.length; ev++) {
-                   if (localVersion[embeddedVersions[ev]] === letter || _typeof(localVersion[embeddedVersions[ev]]) === 'object' && localVersion[embeddedVersions[ev]].indexOf && localVersion[embeddedVersions[ev]].indexOf(letter) > -1) {
-                     if (embeddedVersions.indexOf(form) > -1) {
-                       return localVersion[form];
-                     }
+               for (var ev = 0; ev < embeddedVersions.length; ev++) {
+                 if (localVersion[embeddedVersions[ev]] === letter || _typeof(localVersion[embeddedVersions[ev]]) === 'object' && localVersion[embeddedVersions[ev]].indexOf && localVersion[embeddedVersions[ev]].indexOf(letter) > -1) {
+                   if (embeddedVersions.indexOf(form) > -1) {
+                     return localVersion[form];
                    }
                  }
                }
              }
            }
          }
+       }
 
-         exports.CharShaper = CharShaper;
+       var CharShaper_2 = CharShaper;
+       var CharShaper_1 = /*#__PURE__*/Object.defineProperty({
+         CharShaper: CharShaper_2
+       }, '__esModule', {
+         value: true
        });
 
-       var WordShaper_1 = createCommonjsModule(function (module, exports) {
-
-         Object.defineProperty(exports, "__esModule", {
-           value: true
-         });
-
-         function WordShaper(word) {
-           var state = 'initial';
-           var output = '';
+       function WordShaper$1(word) {
+         var state = 'initial';
+         var output = '';
 
-           for (var w = 0; w < word.length; w++) {
-             var nextLetter = ' ';
+         for (var w = 0; w < word.length; w++) {
+           var nextLetter = ' ';
 
-             for (var nxw = w + 1; nxw < word.length; nxw++) {
-               if (!isArabic_1.isArabic(word[nxw])) {
-                 break;
-               }
-
-               if (reference.tashkeel.indexOf(word[nxw]) === -1) {
-                 nextLetter = word[nxw];
-                 break;
-               }
+           for (var nxw = w + 1; nxw < word.length; nxw++) {
+             if (!isArabic_1.isArabic(word[nxw])) {
+               break;
              }
 
-             if (!isArabic_1.isArabic(word[w]) || isArabic_1.isMath(word[w])) {
-               // space or other non-Arabic
-               output += word[w];
-               state = 'initial';
-             } else if (reference.tashkeel.indexOf(word[w]) > -1) {
-               // tashkeel - add without changing state
-               output += word[w];
-             } else if (nextLetter === ' ' || // last Arabic letter in this word
-             reference.lineBreakers.indexOf(word[w]) > -1) {
-               // the current letter is known to break lines
-               output += CharShaper_1.CharShaper(word[w], state === 'initial' ? 'isolated' : 'final');
-               state = 'initial';
-             } else if (reference.lams.indexOf(word[w]) > -1 && reference.alefs.indexOf(nextLetter) > -1) {
-               // LA letters - advance an additional letter after this
-               output += unicodeLigatures["default"][word[w] + nextLetter][state === 'initial' ? 'isolated' : 'final'];
+             if (reference.tashkeel.indexOf(word[nxw]) === -1) {
+               nextLetter = word[nxw];
+               break;
+             }
+           }
 
-               while (word[w] !== nextLetter) {
-                 w++;
-               }
+           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'];
 
-               state = 'initial';
-             } else {
-               output += CharShaper_1.CharShaper(word[w], state);
-               state = 'medial';
+             while (word[w] !== nextLetter) {
+               w++;
              }
-           }
 
-           return output;
+             state = 'initial';
+           } else {
+             output += CharShaper_1.CharShaper(word[w], state);
+             state = 'medial';
+           }
          }
 
-         exports.WordShaper = WordShaper;
-       });
-
-       var ParentLetter_1 = createCommonjsModule(function (module, exports) {
+         return output;
+       }
 
-         Object.defineProperty(exports, "__esModule", {
-           value: true
-         });
+       var WordShaper_2 = WordShaper$1;
+       var WordShaper_1 = /*#__PURE__*/Object.defineProperty({
+         WordShaper: WordShaper_2
+       }, '__esModule', {
+         value: true
+       });
 
-         function ParentLetter(letter) {
-           if (!isArabic_1.isArabic(letter)) {
-             throw new Error('Not an Arabic letter');
-           }
+       function ParentLetter(letter) {
+         if (!isArabic_1.isArabic(letter)) {
+           throw new Error('Not an Arabic letter');
+         }
 
-           for (var w = 0; w < reference.letterList.length; w++) {
-             // ok so we are checking this potential lettertron
-             var letterForms = unicodeArabic["default"][reference.letterList[w]];
-             var versions = Object.keys(letterForms);
+         for (var 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]];
+           for (var v = 0; v < versions.length; v++) {
+             var localVersion = letterForms[versions[v]];
 
-               if (_typeof(localVersion) === 'object' && typeof localVersion.indexOf === 'undefined') {
-                 // look at this embedded object
-                 var embeddedForms = Object.keys(localVersion);
+             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]];
+               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;
-                   }
+                 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;
                }
+             } else if (localVersion === letter || _typeof(localVersion) === 'object' && localVersion.indexOf && localVersion.indexOf(letter) > -1) {
+               // match
+               return letterForms;
              }
-
-             return null;
            }
+
+           return null;
          }
+       }
 
-         exports.ParentLetter = ParentLetter;
+       var ParentLetter_2 = ParentLetter;
 
-         function GrandparentLetter(letter) {
-           if (!isArabic_1.isArabic(letter)) {
-             throw new Error('Not an Arabic letter');
-           }
+       function GrandparentLetter(letter) {
+         if (!isArabic_1.isArabic(letter)) {
+           throw new Error('Not an Arabic letter');
+         }
 
-           for (var w = 0; w < reference.letterList.length; w++) {
-             // ok so we are checking this potential lettertron
-             var letterForms = unicodeArabic["default"][reference.letterList[w]];
-             var versions = Object.keys(letterForms);
+         for (var 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]];
+           for (var v = 0; v < versions.length; v++) {
+             var localVersion = letterForms[versions[v]];
 
-               if (_typeof(localVersion) === 'object' && typeof localVersion.indexOf === 'undefined') {
-                 // look at this embedded object
-                 var embeddedForms = Object.keys(localVersion);
+             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]];
+               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;
-                   }
+                 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;
                }
+             } else if (localVersion === letter || _typeof(localVersion) === 'object' && localVersion.indexOf && localVersion.indexOf(letter) > -1) {
+               // match
+               return letterForms;
              }
-
-             return null;
            }
+
+           return null;
          }
+       }
 
-         exports.GrandparentLetter = GrandparentLetter;
+       var GrandparentLetter_1 = GrandparentLetter;
+       var ParentLetter_1 = /*#__PURE__*/Object.defineProperty({
+         ParentLetter: ParentLetter_2,
+         GrandparentLetter: GrandparentLetter_1
+       }, '__esModule', {
+         value: true
        });
 
-       var lib = createCommonjsModule(function (module, exports) {
-
-         Object.defineProperty(exports, "__esModule", {
-           value: true
-         });
-         exports.isArabic = isArabic_1.isArabic;
-         exports.GlyphSplitter = GlyphSplitter_1.GlyphSplitter;
-         exports.BaselineSplitter = BaselineSplitter_1.BaselineSplitter;
-         exports.Normal = Normalization.Normal;
-         exports.CharShaper = CharShaper_1.CharShaper;
-         exports.WordShaper = WordShaper_1.WordShaper;
-         exports.ParentLetter = ParentLetter_1.ParentLetter;
-         exports.GrandparentLetter = ParentLetter_1.GrandparentLetter;
-       });
+       isArabic_1.isArabic;
+       GlyphSplitter_1.GlyphSplitter;
+       BaselineSplitter_1.BaselineSplitter;
+       Normalization.Normal;
+       CharShaper_1.CharShaper;
+       var WordShaper = WordShaper_1.WordShaper;
+       ParentLetter_1.ParentLetter;
+       ParentLetter_1.GrandparentLetter;
 
        var rtlRegex = /[\u0590-\u05FF\u0600-\u06FF\u0750-\u07BF\u08A0–\u08BF]/;
        function fixRTLTextForSvg(inputText) {
          var hebrewSign = /[\u0591-\u05bd\u05bf\u05c1-\u05c5\u05c7]/; // Arabic word shaping
 
          if (arabicRegex.test(inputText)) {
-           inputText = lib.WordShaper(inputText);
+           inputText = WordShaper(inputText);
          }
 
          for (var n = 0; n < inputText.length; n++) {
        var propertyIsEnumerable = objectPropertyIsEnumerable.f;
 
        // `Object.{ entries, values }` methods implementation
-       var createMethod$5 = function (TO_ENTRIES) {
+       var createMethod$1 = function (TO_ENTRIES) {
          return function (it) {
            var O = toIndexedObject(it);
            var keys = objectKeys(O);
 
        var objectToArray = {
          // `Object.entries` method
-         // https://tc39.github.io/ecma262/#sec-object.entries
-         entries: createMethod$5(true),
+         // https://tc39.es/ecma262/#sec-object.entries
+         entries: createMethod$1(true),
          // `Object.values` method
-         // https://tc39.github.io/ecma262/#sec-object.values
-         values: createMethod$5(false)
+         // https://tc39.es/ecma262/#sec-object.values
+         values: createMethod$1(false)
        };
 
        var $values = objectToArray.values;
 
        // `Object.values` method
-       // https://tc39.github.io/ecma262/#sec-object.values
+       // https://tc39.es/ecma262/#sec-object.values
        _export({ target: 'Object', stat: true }, {
          values: function values(O) {
            return $values(O);
          }
        }
 
-       function responseText(response) {
-         if (!response.ok) throw new Error(response.status + " " + response.statusText);
-         return response.text();
-       }
+       var vparse = createCommonjsModule(function (module) {
+         (function (window) {
 
-       function d3_text (input, init) {
-         return fetch(input, init).then(responseText);
-       }
+           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 responseJson(response) {
-         if (!response.ok) throw new Error(response.status + " " + response.statusText);
-         if (response.status === 204 || response.status === 205) return;
-         return response.json();
-       }
+           function compare(v) {
+             if (typeof v === 'string') {
+               v = parseVersion(v);
+             }
 
-       function d3_json (input, init) {
-         return fetch(input, init).then(responseJson);
-       }
+             for (var i = 0; i < 4; i++) {
+               if (this.parsed[i] !== v.parsed[i]) {
+                 return this.parsed[i] > v.parsed[i] ? 1 : -1;
+               }
+             }
 
-       function parser(type) {
-         return function (input, init) {
-           return d3_text(input, init).then(function (text) {
-             return new DOMParser().parseFromString(text, type);
-           });
-         };
-       }
+             return 0;
+           }
+           /* istanbul ignore next */
 
-       var d3_xml = parser("application/xml");
-       var svg = parser("image/svg+xml");
+
+           if (module && 'object' === 'object') {
+             module.exports = parseVersion;
+           } else {
+             window.parseVersion = parseVersion;
+           }
+         })(commonjsGlobal);
+       });
+
+       var name = "iD";
+       var version = "2.20.1";
+       var description = "A friendly editor for OpenStreetMap";
+       var main = "dist/iD.min.js";
+       var repository = "github:openstreetmap/iD";
+       var homepage = "https://github.com/openstreetmap/iD";
+       var bugs = "https://github.com/openstreetmap/iD/issues";
+       var keywords = ["editor","openstreetmap"];
+       var license = "ISC";
+       var scripts = {all:"npm-run-all -s clean build build:legacy dist",build:"npm-run-all -s build:css build:data build:dev","build:css":"node scripts/build_css.js","build:data":"shx mkdir -p dist/data && node scripts/build_data.js","build:dev":"rollup --config config/rollup.config.dev.js","build:legacy":"rollup --config config/rollup.config.legacy.js","build:stats":"rollup --config config/rollup.config.stats.js",clean:"shx rm -f dist/*.js dist/*.map dist/*.css dist/img/*.svg",dist:"npm-run-all -p dist:**","dist:mapillary":"shx mkdir -p dist/mapillary-js && shx cp -R node_modules/mapillary-js/dist/* dist/mapillary-js/","dist:pannellum":"shx mkdir -p dist/pannellum-streetside && shx cp -R node_modules/pannellum/build/* dist/pannellum-streetside/","dist:min:iD":"uglifyjs dist/iD.legacy.js --compress --mangle --output dist/iD.min.js","dist:svg:iD":"svg-sprite --symbol --symbol-dest . --shape-id-generator \"iD-%s\" --symbol-sprite dist/img/iD-sprite.svg \"svg/iD-sprite/**/*.svg\"","dist:svg:community":"svg-sprite --symbol --symbol-dest . --shape-id-generator \"community-%s\" --symbol-sprite dist/img/community-sprite.svg node_modules/osm-community-index/dist/img/*.svg","dist:svg:fa":"svg-sprite --symbol --symbol-dest . --symbol-sprite dist/img/fa-sprite.svg svg/fontawesome/*.svg","dist:svg:maki":"svg-sprite --symbol --symbol-dest . --shape-id-generator \"maki-%s\" --symbol-sprite dist/img/maki-sprite.svg node_modules/@mapbox/maki/icons/*.svg","dist:svg:mapillary:signs":"svg-sprite --symbol --symbol-dest . --symbol-sprite dist/img/mapillary-sprite.svg node_modules/mapillary_sprite_source/package_signs/*.svg","dist:svg:mapillary:objects":"svg-sprite --symbol --symbol-dest . --symbol-sprite dist/img/mapillary-object-sprite.svg node_modules/mapillary_sprite_source/package_objects/*.svg","dist:svg:temaki":"svg-sprite --symbol --symbol-dest . --shape-id-generator \"temaki-%s\" --symbol-sprite dist/img/temaki-sprite.svg node_modules/@ideditor/temaki/icons/*.svg",imagery:"node scripts/update_imagery.js",lint:"eslint scripts test/spec modules","lint:fix":"eslint scripts test/spec modules --fix",start:"npm-run-all -s build start:server",quickstart:"npm-run-all -s build:dev start:server","start:server":"node scripts/server.js",test:"npm-run-all -s lint build:css build:data build:legacy test:spec","test:spec":"phantomjs --web-security=no node_modules/mocha-phantomjs-core/mocha-phantomjs-core.js test/index.html spec",translations:"node scripts/update_locales.js"};
+       var dependencies = {"@ideditor/country-coder":"~5.0.3","@ideditor/location-conflation":"~1.0.2","@mapbox/geojson-area":"^0.2.2","@mapbox/sexagesimal":"1.2.0","@mapbox/vector-tile":"^1.3.1","@tmcw/togeojson":"^4.5.0","@turf/bbox-clip":"^6.0.0","abortcontroller-polyfill":"^1.4.0","aes-js":"^3.1.2","alif-toolkit":"^1.2.9","core-js":"^3.6.5",diacritics:"1.3.0","fast-deep-equal":"~3.1.1","fast-json-stable-stringify":"2.1.0","lodash-es":"~4.17.15",marked:"~2.0.0","node-diff3":"2.1.0","osm-auth":"1.1.0",pannellum:"2.5.6",pbf:"^3.2.1","polygon-clipping":"~0.15.1",rbush:"3.0.1","whatwg-fetch":"^3.4.1","which-polygon":"2.2.0"};
+       var devDependencies = {"@babel/core":"^7.11.6","@babel/preset-env":"^7.11.5","@fortawesome/fontawesome-svg-core":"^1.2.32","@fortawesome/free-brands-svg-icons":"~5.15.1","@fortawesome/free-regular-svg-icons":"~5.15.1","@fortawesome/free-solid-svg-icons":"~5.15.1","@ideditor/temaki":"~4.4.0","@mapbox/maki":"^6.0.0","@rollup/plugin-babel":"^5.2.1","@rollup/plugin-commonjs":"^17.0.0","@rollup/plugin-json":"^4.0.1","@rollup/plugin-node-resolve":"~11.2.0",autoprefixer:"^10.0.1",btoa:"^1.2.1",chai:"^4.1.0","cldr-core":"37.0.0","cldr-localenames-full":"37.0.0",colors:"^1.1.2","concat-files":"^0.1.1",d3:"~6.6.0","editor-layer-index":"github:osmlab/editor-layer-index#gh-pages",eslint:"^7.1.0",gaze:"^1.1.3",glob:"^7.1.0",happen:"^0.3.1","js-yaml":"^4.0.0","json-stringify-pretty-compact":"^3.0.0",mapillary_sprite_source:"^1.8.0","mapillary-js":"4.0.0",minimist:"^1.2.3",mocha:"^7.0.1","mocha-phantomjs-core":"^2.1.0","name-suggestion-index":"~6.0","node-fetch":"^2.6.1","npm-run-all":"^4.0.0","object-inspect":"1.10.3","osm-community-index":"~5.1.0","phantomjs-prebuilt":"~2.1.16",postcss:"^8.1.1","postcss-selector-prepend":"^0.5.0",rollup:"~2.52.8","rollup-plugin-includepaths":"~0.2.3","rollup-plugin-progress":"^1.1.1","rollup-plugin-visualizer":"~4.2.0",shelljs:"^0.8.0",shx:"^0.3.0",sinon:"7.5.0","sinon-chai":"^3.3.0",smash:"0.0","static-server":"^2.2.1","svg-sprite":"1.5.1","uglify-js":"~3.13.0",vparse:"~1.1.0"};
+       var engines = {node:">=10"};
+       var browserslist = ["> 0.2%, last 6 major versions, Firefox ESR, IE 11, maintained node versions"];
+       var packageJSON = {
+       name: name,
+       version: version,
+       description: description,
+       main: main,
+       repository: repository,
+       homepage: homepage,
+       bugs: bugs,
+       keywords: keywords,
+       license: license,
+       scripts: scripts,
+       dependencies: dependencies,
+       devDependencies: devDependencies,
+       engines: engines,
+       browserslist: browserslist
+       };
 
        var _mainFileFetcher = coreFileFetcher(); // singleton
        // coreFileFetcher asynchronously fetches data from JSON files
        //
 
        function coreFileFetcher() {
+         var ociVersion = packageJSON.devDependencies['osm-community-index'];
+         var v = vparse(ociVersion);
+         var vMinor = "".concat(v.major, ".").concat(v.minor);
          var _this = {};
          var _inflight = {};
          var _fileMap = {
            'address_formats': 'data/address_formats.min.json',
-           'deprecated': 'data/deprecated.min.json',
-           'discarded': 'data/discarded.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': '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',
+           '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',
            var prom = _inflight[url];
 
            if (!prom) {
-             _inflight[url] = prom = d3_json(url).then(function (result) {
+             _inflight[url] = prom = utilFetchJson(url).then(function (result) {
                delete _inflight[url];
 
                if (!result) {
          return _this;
        }
 
-       var $findIndex$1 = arrayIteration.findIndex;
-
-
-
-       var FIND_INDEX = 'findIndex';
-       var SKIPS_HOLES$1 = true;
-
-       var USES_TO_LENGTH$b = arrayMethodUsesToLength(FIND_INDEX);
-
-       // Shouldn't skip holes
-       if (FIND_INDEX in []) Array(1)[FIND_INDEX](function () { SKIPS_HOLES$1 = false; });
-
-       // `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);
-         }
-       });
-
-       // https://tc39.github.io/ecma262/#sec-array.prototype-@@unscopables
-       addToUnscopables(FIND_INDEX);
-
-       var $includes$1 = arrayIncludes.includes;
-
-
-
-       var USES_TO_LENGTH$c = arrayMethodUsesToLength('indexOf', { ACCESSORS: true, 1: 0 });
-
-       // `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);
-         }
-       });
-
-       // https://tc39.github.io/ecma262/#sec-array.prototype-@@unscopables
-       addToUnscopables('includes');
-
-       var notARegexp = function (it) {
-         if (isRegexp(it)) {
-           throw TypeError("The method doesn't accept regular expressions");
-         } return it;
-       };
-
-       var MATCH$2 = wellKnownSymbol('match');
-
-       var correctIsRegexpLogic = function (METHOD_NAME) {
-         var regexp = /./;
-         try {
-           '/./'[METHOD_NAME](regexp);
-         } catch (error1) {
-           try {
-             regexp[MATCH$2] = false;
-             return '/./'[METHOD_NAME](regexp);
-           } catch (error2) { /* empty */ }
-         } return false;
-       };
-
-       // `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);
-         }
-       });
-
-       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;
-       }
-
-       var getOwnPropertyNames$2 = objectGetOwnPropertyNames.f;
-       var getOwnPropertyDescriptor$3 = objectGetOwnPropertyDescriptor.f;
-       var defineProperty$a = objectDefineProperty.f;
+       var getOwnPropertyNames = objectGetOwnPropertyNames.f;
+       var getOwnPropertyDescriptor$2 = objectGetOwnPropertyDescriptor.f;
+       var defineProperty = objectDefineProperty.f;
        var trim$2 = stringTrim.trim;
 
        var NUMBER = 'Number';
-       var NativeNumber = global_1[NUMBER];
+       var NativeNumber = global$2[NUMBER];
        var NumberPrototype = NativeNumber.prototype;
 
        // Opera ~12 has broken Object#toString
        var BROKEN_CLASSOF = classofRaw(objectCreate(NumberPrototype)) == NUMBER;
 
        // `ToNumber` abstract operation
-       // https://tc39.github.io/ecma262/#sec-tonumber
-       var toNumber = function (argument) {
+       // https://tc39.es/ecma262/#sec-tonumber
+       var toNumber$1 = function (argument) {
          var it = toPrimitive(argument, false);
          var first, third, radix, maxCode, digits, length, index, code;
          if (typeof it == 'string' && it.length > 2) {
        };
 
        // `Number` constructor
-       // https://tc39.github.io/ecma262/#sec-number-constructor
+       // https://tc39.es/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;
            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);
+               ? inheritIfRequired(new NativeNumber(toNumber$1(it)), dummy, NumberWrapper) : toNumber$1(it);
          };
-         for (var keys$3 = descriptors ? getOwnPropertyNames$2(NativeNumber) : (
+         for (var keys = descriptors ? getOwnPropertyNames(NativeNumber) : (
            // ES3:
            'MAX_VALUE,MIN_VALUE,NaN,NEGATIVE_INFINITY,POSITIVE_INFINITY,' +
            // ES2015 (in case, if modules with ES2015 Number statics required before):
            'EPSILON,isFinite,isInteger,isNaN,isSafeInteger,MAX_SAFE_INTEGER,' +
-           'MIN_SAFE_INTEGER,parseFloat,parseInt,isInteger'
-         ).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));
+           'MIN_SAFE_INTEGER,parseFloat,parseInt,isInteger,' +
+           // ESNext
+           'fromString,range'
+         ).split(','), j = 0, key; keys.length > j; j++) {
+           if (has$1(NativeNumber, key = keys[j]) && !has$1(NumberWrapper, key)) {
+             defineProperty(NumberWrapper, key, getOwnPropertyDescriptor$2(NativeNumber, key));
            }
          }
          NumberWrapper.prototype = NumberPrototype;
          NumberPrototype.constructor = NumberWrapper;
-         redefine(global_1, NUMBER, NumberWrapper);
+         redefine(global$2, 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
-       });
+       // `thisNumberValue` abstract operation
+       // https://tc39.es/ecma262/#sec-thisnumbervalue
+       var thisNumberValue = function (value) {
+         if (typeof value != 'number' && classofRaw(value) != 'Number') {
+           throw TypeError('Incorrect invocation');
+         }
+         return +value;
+       };
 
-       var aesJs = createCommonjsModule(function (module, exports) {
-         /*! MIT License. Copyright 2015-2018 Richard Moore <me@ricmoo.com>. See LICENSE.txt. */
-         (function (root) {
+       // `String.prototype.repeat` method implementation
+       // https://tc39.es/ecma262/#sec-string.prototype.repeat
+       var stringRepeat = 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;
+       };
 
-           function checkInt(value) {
-             return parseInt(value) === value;
+       var nativeToFixed = 1.0.toFixed;
+       var floor = Math.floor;
+
+       var pow = function (x, n, acc) {
+         return n === 0 ? acc : n % 2 === 1 ? pow(x, n - 1, acc * x) : pow(x * x, n / 2, acc);
+       };
+
+       var log = function (x) {
+         var n = 0;
+         var x2 = x;
+         while (x2 >= 4096) {
+           n += 12;
+           x2 /= 4096;
+         }
+         while (x2 >= 2) {
+           n += 1;
+           x2 /= 2;
+         } return n;
+       };
+
+       var multiply = function (data, n, c) {
+         var index = -1;
+         var c2 = c;
+         while (++index < 6) {
+           c2 += n * data[index];
+           data[index] = c2 % 1e7;
+           c2 = floor(c2 / 1e7);
+         }
+       };
+
+       var divide = function (data, n) {
+         var index = 6;
+         var c = 0;
+         while (--index >= 0) {
+           c += data[index];
+           data[index] = floor(c / n);
+           c = (c % n) * 1e7;
+         }
+       };
+
+       var dataToString = function (data) {
+         var index = 6;
+         var s = '';
+         while (--index >= 0) {
+           if (s !== '' || index === 0 || data[index] !== 0) {
+             var t = String(data[index]);
+             s = s === '' ? t : s + stringRepeat.call('0', 7 - t.length) + t;
            }
+         } return s;
+       };
 
-           function checkInts(arrayish) {
-             if (!checkInt(arrayish.length)) {
-               return false;
-             }
+       var FORCED$4 = nativeToFixed && (
+         0.00008.toFixed(3) !== '0.000' ||
+         0.9.toFixed(0) !== '1' ||
+         1.255.toFixed(2) !== '1.25' ||
+         1000000000000000128.0.toFixed(0) !== '1000000000000000128'
+       ) || !fails(function () {
+         // V8 ~ Android 4.3-
+         nativeToFixed.call({});
+       });
 
-             for (var i = 0; i < arrayish.length; i++) {
-               if (!checkInt(arrayish[i]) || arrayish[i] < 0 || arrayish[i] > 255) {
-                 return false;
+       // `Number.prototype.toFixed` method
+       // https://tc39.es/ecma262/#sec-number.prototype.tofixed
+       _export({ target: 'Number', proto: true, forced: FORCED$4 }, {
+         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;
+
+           if (fractDigits < 0 || fractDigits > 20) throw RangeError('Incorrect fraction digits');
+           // eslint-disable-next-line no-self-compare -- NaN check
+           if (number != number) return 'NaN';
+           if (number <= -1e21 || number >= 1e21) return String(number);
+           if (number < 0) {
+             sign = '-';
+             number = -number;
+           }
+           if (number > 1e-21) {
+             e = log(number * pow(2, 69, 1)) - 69;
+             z = e < 0 ? number * pow(2, -e, 1) : number / pow(2, e, 1);
+             z *= 0x10000000000000;
+             e = 52 - e;
+             if (e > 0) {
+               multiply(data, 0, z);
+               j = fractDigits;
+               while (j >= 7) {
+                 multiply(data, 1e7, 0);
+                 j -= 7;
+               }
+               multiply(data, pow(10, j, 1), 0);
+               j = e - 1;
+               while (j >= 23) {
+                 divide(data, 1 << 23);
+                 j -= 23;
                }
+               divide(data, 1 << j);
+               multiply(data, 1, 1);
+               divide(data, 2);
+               result = dataToString(data);
+             } else {
+               multiply(data, 0, z);
+               multiply(data, 1 << -e, 0);
+               result = dataToString(data) + stringRepeat.call('0', fractDigits);
              }
-
-             return true;
            }
+           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;
+         }
+       });
 
-           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);
-                 }
-               }
+       var globalIsFinite = global$2.isFinite;
 
-               return arg;
-             } // It's an array; check it is a valid representation of a byte
+       // `Number.isFinite` method
+       // https://tc39.es/ecma262/#sec-number.isfinite
+       // eslint-disable-next-line es/no-number-isfinite -- safe
+       var numberIsFinite = Number.isFinite || function isFinite(it) {
+         return typeof it == 'number' && globalIsFinite(it);
+       };
 
+       // `Number.isFinite` method
+       // https://tc39.es/ecma262/#sec-number.isfinite
+       _export({ target: 'Number', stat: true }, { isFinite: numberIsFinite });
 
-             if (Array.isArray(arg)) {
-               if (!checkInts(arg)) {
-                 throw new Error('Array contains invalid value: ' + arg);
-               }
+       var fromCharCode = String.fromCharCode;
+       // eslint-disable-next-line es/no-string-fromcodepoint -- required for testing
+       var $fromCodePoint = String.fromCodePoint;
 
-               return new Uint8Array(arg);
-             } // Something else, but behaves like an array (maybe a Buffer? Arguments?)
+       // length should be 1, old FF problem
+       var INCORRECT_LENGTH = !!$fromCodePoint && $fromCodePoint.length != 1;
 
+       // `String.fromCodePoint` method
+       // https://tc39.es/ecma262/#sec-string.fromcodepoint
+       _export({ target: 'String', stat: true, forced: INCORRECT_LENGTH }, {
+         // eslint-disable-next-line no-unused-vars -- required for `.length`
+         fromCodePoint: function fromCodePoint(x) {
+           var elements = [];
+           var length = arguments.length;
+           var i = 0;
+           var code;
+           while (length > i) {
+             code = +arguments[i++];
+             if (toAbsoluteIndex(code, 0x10FFFF) !== code) throw RangeError(code + ' is not a valid code point');
+             elements.push(code < 0x10000
+               ? fromCharCode(code)
+               : fromCharCode(((code -= 0x10000) >> 10) + 0xD800, code % 0x400 + 0xDC00)
+             );
+           } return elements.join('');
+         }
+       });
 
-             if (checkInt(arg.length) && checkInts(arg)) {
-               return new Uint8Array(arg);
-             }
+       // @@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(this);
+             var searcher = regexp == undefined ? undefined : regexp[SEARCH];
+             return searcher !== undefined ? searcher.call(regexp, O) : new RegExp(regexp)[SEARCH](String(O));
+           },
+           // `RegExp.prototype[@@search]` method
+           // https://tc39.es/ecma262/#sec-regexp.prototype-@@search
+           function (string) {
+             var res = maybeCallNative(nativeSearch, this, string);
+             if (res.done) return res.value;
 
-             throw new Error('unsupported array-like object');
+             var rx = anObject(this);
+             var S = String(string);
+
+             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;
            }
+         ];
+       });
 
-           function createArray(length) {
-             return new Uint8Array(length);
+       var quickselect$1 = createCommonjsModule(function (module, exports) {
+         (function (global, factory) {
+           module.exports = factory() ;
+         })(commonjsGlobal, function () {
+
+           function quickselect(arr, k, left, right, compare) {
+             quickselectStep(arr, k, left || 0, right || arr.length - 1, compare || defaultCompare);
            }
 
-           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);
+           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);
                }
-             }
 
-             targetArray.set(sourceArray, targetStart);
-           }
+               var t = arr[k];
+               var i = left;
+               var j = right;
+               swap(arr, left, k);
+               if (compare(arr[right], t) > 0) swap(arr, left, right);
 
-           var convertUtf8 = function () {
-             function toBytes(text) {
-               var result = [],
-                   i = 0;
-               text = encodeURI(text);
+               while (i < j) {
+                 swap(arr, i, j);
+                 i++;
+                 j--;
 
-               while (i < text.length) {
-                 var c = text.charCodeAt(i++); // if it is a % sign, encode the following 2 bytes as a hex value
+                 while (compare(arr[i], t) < 0) {
+                   i++;
+                 }
 
-                 if (c === 37) {
-                   result.push(parseInt(text.substr(i, 2), 16));
-                   i += 2; // otherwise, just the actual byte
-                 } else {
-                   result.push(c);
+                 while (compare(arr[j], t) > 0) {
+                   j--;
                  }
                }
 
-               return coerceArray(result);
+               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 fromBytes(bytes) {
-               var result = [],
-                   i = 0;
-
-               while (i < bytes.length) {
-                 var c = bytes[i];
+           function swap(arr, i, j) {
+             var tmp = arr[i];
+             arr[i] = arr[j];
+             arr[j] = tmp;
+           }
 
-                 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;
-                 }
-               }
+           function defaultCompare(a, b) {
+             return a < b ? -1 : a > b ? 1 : 0;
+           }
 
-               return result.join('');
-             }
+           return quickselect;
+         });
+       });
 
-             return {
-               toBytes: toBytes,
-               fromBytes: fromBytes
-             };
-           }();
+       var rbush_1 = rbush;
+       var _default$1 = rbush;
 
-           var convertHex = function () {
-             function toBytes(text) {
-               var result = [];
+       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
 
-               for (var i = 0; i < text.length; i += 2) {
-                 result.push(parseInt(text.substr(i, 2), 16));
-               }
+         this._maxEntries = Math.max(4, maxEntries || 9);
+         this._minEntries = Math.max(2, Math.ceil(this._maxEntries * 0.4));
 
-               return result;
-             } // http://ixti.net/development/javascript/2011/11/11/base64-encodedecode-of-utf8-in-browser-with-js.html
+         if (format) {
+           this._initFormat(format);
+         }
 
+         this.clear();
+       }
 
-             var Hex = '0123456789abcdef';
+       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 fromBytes(bytes) {
-               var result = [];
+           while (node) {
+             for (i = 0, len = node.children.length; i < len; i++) {
+               child = node.children[i];
+               childBBox = node.leaf ? toBBox(child) : child;
 
-               for (var i = 0; i < bytes.length; i++) {
-                 var v = bytes[i];
-                 result.push(Hex[(v & 0xf0) >> 4] + Hex[v & 0x0f]);
+               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);
                }
-
-               return result.join('');
              }
 
-             return {
-               toBytes: toBytes,
-               fromBytes: fromBytes
-             };
-           }(); // Number of rounds by keysize
+             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;
 
-           var numberOfRounds = {
-             16: 10,
-             24: 12,
-             32: 14
-           }; // Round constant words
+           while (node) {
+             for (i = 0, len = node.children.length; i < len; i++) {
+               child = node.children[i];
+               childBBox = node.leaf ? toBBox(child) : child;
 
-           var rcon = [0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91]; // S-box and Inverse S-box (S is for Substitution)
+               if (intersects$1(bbox, childBBox)) {
+                 if (node.leaf || contains$1(bbox, childBBox)) return true;
+                 nodesToSearch.push(child);
+               }
+             }
 
-           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
+             node = nodesToSearch.pop();
+           }
 
-           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;
-           }
+           return false;
+         },
+         load: function load(data) {
+           if (!(data && data.length)) return this;
 
-           var AES = function AES(key) {
-             if (!(this instanceof AES)) {
-               throw Error('AES must be instanitated with `new`');
+           if (data.length < this._minEntries) {
+             for (var i = 0, len = data.length; i < len; i++) {
+               this.insert(data[i]);
              }
 
-             Object.defineProperty(this, 'key', {
-               value: coerceArray(key, true)
-             });
-
-             this._prepare();
-           };
+             return this;
+           } // recursively build the tree with the given data from scratch using OMT algorithm
 
-           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
+           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._Ke = []; // decryption round keys
 
-             this._Kd = [];
+             this._insert(node, this.data.height - node.height - 1, true);
+           }
 
-             for (var i = 0; i <= rounds; i++) {
-               this._Ke.push([0, 0, 0, 0]);
+           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
 
-               this._Kd.push([0, 0, 0, 0]);
+           while (node || path.length) {
+             if (!node) {
+               // go up
+               node = path.pop();
+               parent = path[path.length - 1];
+               i = indexes.pop();
+               goingUp = true;
              }
 
-             var roundKeyCount = (rounds + 1) * 4;
-             var KC = this.key.length / 4; // convert the key into ints
+             if (node.leaf) {
+               // check current node
+               index = findItem$1(item, node.children, equalsFn);
 
-             var tk = convertToInt32(this.key); // copy values into round key arrays
+               if (index !== -1) {
+                 // item found, remove the item and condense tree upwards
+                 node.children.splice(index, 1);
+                 path.push(node);
 
-             var index;
+                 this._condense(path);
 
-             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 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
 
-             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)
+           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 = [];
 
-               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)
+           while (node) {
+             if (node.leaf) result.push.apply(result, node.children);else nodesToSearch.push.apply(nodesToSearch, node.children);
+             node = nodesToSearch.pop();
+           }
 
-               } else {
-                 for (var i = 1; i < KC / 2; i++) {
-                   tk[i] ^= tk[i - 1];
-                 }
+           return result;
+         },
+         _build: function _build(items, left, right, height) {
+           var N = right - left + 1,
+               M = this._maxEntries,
+               node;
 
-                 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;
+           if (N <= M) {
+             // reached leaf level; return leaf
+             node = createNode$1(items.slice(left, right + 1));
+             calcBBox$1(node, this.toBBox);
+             return node;
+           }
 
-                 for (var i = KC / 2 + 1; i < KC; i++) {
-                   tk[i] ^= tk[i - 1];
-                 }
-               } // copy values into round key arrays
+           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));
+           }
 
-               var i = 0,
-                   r,
-                   c;
+           node = createNode$1([]);
+           node.leaf = false;
+           node.height = height; // split the items into M mostly square tiles
 
-               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 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 (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];
-               }
-             }
-           };
+             for (j = i; j <= right2; j += N2) {
+               right3 = Math.min(j + N2 - 1, right2); // pack each entry recursively
 
-           AES.prototype.encrypt = function (plaintext) {
-             if (plaintext.length != 16) {
-               throw new Error('invalid plaintext size (must be 16 bytes)');
+               node.children.push(this._build(items, j, right3, height - 1));
              }
+           }
 
-             var rounds = this._Ke.length - 1;
-             var a = [0, 0, 0, 0]; // convert plaintext to (ints ^ key)
-
-             var t = convertToInt32(plaintext);
+           calcBBox$1(node, this.toBBox);
+           return node;
+         },
+         _chooseSubtree: function _chooseSubtree(bbox, node, level, path) {
+           var i, len, child, targetNode, area, enlargement, minArea, minEnlargement;
 
-             for (var i = 0; i < 4; i++) {
-               t[i] ^= this._Ke[0][i];
-             } // apply round transforms
+           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
 
-             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];
+               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;
+                 }
                }
+             }
 
-               t = a.slice();
-             } // the last round is special
-
+             node = targetNode || node.children[0];
+           }
 
-             var result = createArray(16),
-                 tt;
+           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
 
-             for (var i = 0; i < 4; i++) {
-               tt = this._Ke[rounds][i];
-               result[4 * i] = (S[t[i] >> 24 & 0xff] ^ tt >> 24) & 0xff;
-               result[4 * i + 1] = (S[t[(i + 1) % 4] >> 16 & 0xff] ^ tt >> 16) & 0xff;
-               result[4 * i + 2] = (S[t[(i + 2) % 4] >> 8 & 0xff] ^ tt >> 8) & 0xff;
-               result[4 * i + 3] = (S[t[(i + 3) % 4] & 0xff] ^ tt) & 0xff;
-             }
+           var node = this._chooseSubtree(bbox, this.data, level, insertPath); // put the item into the node
 
-             return result;
-           };
 
-           AES.prototype.decrypt = function (ciphertext) {
-             if (ciphertext.length != 16) {
-               throw new Error('invalid ciphertext size (must be 16 bytes)');
-             }
+           node.children.push(item);
+           extend$2(node, bbox); // split on node overflow; propagate upwards if necessary
 
-             var rounds = this._Kd.length - 1;
-             var a = [0, 0, 0, 0]; // convert plaintext to (ints ^ key)
+           while (level >= 0) {
+             if (insertPath[level].children.length > this._maxEntries) {
+               this._split(insertPath, level);
 
-             var t = convertToInt32(ciphertext);
+               level--;
+             } else break;
+           } // adjust bboxes along the insertion path
 
-             for (var i = 0; i < 4; i++) {
-               t[i] ^= this._Kd[0][i];
-             } // apply round transforms
 
+           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;
 
-             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];
-               }
+           this._chooseSplitAxis(node, m, M);
 
-               t = a.slice();
-             } // the last round is special
+           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;
 
-             var result = createArray(16),
-                 tt;
+           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
 
-             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 (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 result;
-           };
-           /**
-            *  Mode Of Operation - Electonic Codebook (ECB)
-            */
+           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
 
 
-           var ModeOfOperationECB = function ModeOfOperationECB(key) {
-             if (!(this instanceof ModeOfOperationECB)) {
-               throw Error('AES must be instanitated with `new`');
-             }
+           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;
 
-             this.description = "Electronic Code Block";
-             this.name = "ecb";
-             this._aes = new AES(key);
-           };
+           for (i = m; i < M - m; i++) {
+             child = node.children[i];
+             extend$2(leftBBox, node.leaf ? toBBox(child) : child);
+             margin += bboxMargin$1(leftBBox);
+           }
 
-           ModeOfOperationECB.prototype.encrypt = function (plaintext) {
-             plaintext = coerceArray(plaintext);
+           for (i = M - m - 1; i >= m; i--) {
+             child = node.children[i];
+             extend$2(rightBBox, node.leaf ? toBBox(child) : child);
+             margin += bboxMargin$1(rightBBox);
+           }
 
-             if (plaintext.length % 16 !== 0) {
-               throw new Error('invalid plaintext size (must be multiple of 16 bytes)');
-             }
+           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] + '};');
+         }
+       };
 
-             var ciphertext = createArray(plaintext.length);
-             var block = createArray(16);
+       function findItem$1(item, items, equalsFn) {
+         if (!equalsFn) return items.indexOf(item);
 
-             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);
-             }
+         for (var i = 0; i < items.length; i++) {
+           if (equalsFn(item, items[i])) return i;
+         }
 
-             return ciphertext;
-           };
+         return -1;
+       } // calculate node's bbox from bboxes of its children
 
-           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)');
-             }
+       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
 
-             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);
-             }
+       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;
 
-             return plaintext;
-           };
-           /**
-            *  Mode Of Operation - Cipher Block Chaining (CBC)
-            */
+         for (var i = k, child; i < p; i++) {
+           child = node.children[i];
+           extend$2(destNode, node.leaf ? toBBox(child) : child);
+         }
 
+         return destNode;
+       }
 
-           var ModeOfOperationCBC = function ModeOfOperationCBC(key, iv) {
-             if (!(this instanceof ModeOfOperationCBC)) {
-               throw Error('AES must be instanitated with `new`');
-             }
+       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;
+       }
 
-             this.description = "Cipher Block Chaining";
-             this.name = "cbc";
+       function compareNodeMinX$1(a, b) {
+         return a.minX - b.minX;
+       }
 
-             if (!iv) {
-               iv = createArray(16);
-             } else if (iv.length != 16) {
-               throw new Error('invalid initialation vector size (must be 16 bytes)');
-             }
+       function compareNodeMinY$1(a, b) {
+         return a.minY - b.minY;
+       }
 
-             this._lastCipherblock = coerceArray(iv, true);
-             this._aes = new AES(key);
-           };
+       function bboxArea$1(a) {
+         return (a.maxX - a.minX) * (a.maxY - a.minY);
+       }
 
-           ModeOfOperationCBC.prototype.encrypt = function (plaintext) {
-             plaintext = coerceArray(plaintext);
+       function bboxMargin$1(a) {
+         return a.maxX - a.minX + (a.maxY - a.minY);
+       }
 
-             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)');
-             }
+       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));
+       }
 
-             var plaintext = coerceArray(ciphertext, true);
-             var xorSegment;
+       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);
+       }
 
-             for (var i = 0; i < plaintext.length; i += this.segmentSize) {
-               xorSegment = this._aes.encrypt(this._shiftRegister);
+       function contains$1(a, b) {
+         return a.minX <= b.minX && a.minY <= b.minY && b.maxX <= a.maxX && b.maxY <= a.maxY;
+       }
 
-               for (var j = 0; j < this.segmentSize; j++) {
-                 plaintext[i + j] ^= xorSegment[j];
-               } // Shift the register
+       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
 
-               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)
-            */
+       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);
+         }
+       }
+       rbush_1["default"] = _default$1;
 
-           var ModeOfOperationOFB = function ModeOfOperationOFB(key, iv) {
-             if (!(this instanceof ModeOfOperationOFB)) {
-               throw Error('AES must be instanitated with `new`');
-             }
+       var lineclip_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
 
-             this.description = "Output Feedback";
-             this.name = "ofb";
+       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 (!iv) {
-               iv = createArray(16);
-             } else if (iv.length != 16) {
-               throw new Error('invalid initialation vector size (must be 16 bytes)');
-             }
+         for (i = 1; i < len; i++) {
+           a = points[i - 1];
+           b = points[i];
+           codeB = lastCode = bitCode$1(b, bbox);
 
-             this._lastPrecipher = coerceArray(iv, true);
-             this._lastPrecipherIndex = 16;
-             this._aes = new AES(key);
-           };
+           while (true) {
+             if (!(codeA | codeB)) {
+               // accept
+               part.push(a);
 
-           ModeOfOperationOFB.prototype.encrypt = function (plaintext) {
-             var encrypted = coerceArray(plaintext, true);
+               if (codeB !== lastCode) {
+                 // segment went outside
+                 part.push(b);
 
-             for (var i = 0; i < encrypted.length; i++) {
-               if (this._lastPrecipherIndex === 16) {
-                 this._lastPrecipher = this._aes.encrypt(this._lastPrecipher);
-                 this._lastPrecipherIndex = 0;
+                 if (i < len - 1) {
+                   // start a new line
+                   result.push(part);
+                   part = [];
+                 }
+               } else if (i === len - 1) {
+                 part.push(b);
                }
 
-               encrypted[i] ^= this._lastPrecipher[this._lastPrecipherIndex++];
+               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);
              }
+           }
 
-             return encrypted;
-           }; // Decryption is symetric
-
+           codeA = lastCode;
+         }
 
-           ModeOfOperationOFB.prototype.decrypt = ModeOfOperationOFB.prototype.encrypt;
-           /**
-            *  Counter object for CTR common mode of operation
-            */
+         if (part.length) result.push(part);
+         return result;
+       } // Sutherland-Hodgeman polygon clipping algorithm
 
-           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
 
+       function polygonclip$1(points, bbox) {
+         var result, edge, prev, prevInside, i, p, inside; // clip against each side of the clip rectangle
 
-             if (initialValue !== 0 && !initialValue) {
-               initialValue = 1;
-             }
+         for (edge = 1; edge <= 8; edge *= 2) {
+           result = [];
+           prev = points[points.length - 1];
+           prevInside = !(bitCode$1(prev, bbox) & edge);
 
-             if (typeof initialValue === 'number') {
-               this._counter = createArray(16);
-               this.setValue(initialValue);
-             } else {
-               this.setBytes(initialValue);
-             }
-           };
+           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
 
-           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 (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;
+           }
 
-             if (value > Number.MAX_SAFE_INTEGER) {
-               throw new Error('integer value out of safe range');
-             }
+           points = result;
+           if (!points.length) break;
+         }
 
-             for (var index = 15; index >= 0; --index) {
-               this._counter[index] = value % 256;
-               value = parseInt(value / 256);
-             }
-           };
+         return result;
+       } // intersect a segment against one of the 4 lines that make up the bbox
 
-           Counter.prototype.setBytes = function (bytes) {
-             bytes = coerceArray(bytes, true);
 
-             if (bytes.length != 16) {
-               throw new Error('invalid counter bytes size (must be 16 bytes)');
-             }
+       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
 
-             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)
-            */
+       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
 
-           var ModeOfOperationCTR = function ModeOfOperationCTR(key, counter) {
-             if (!(this instanceof ModeOfOperationCTR)) {
-               throw Error('AES must be instanitated with `new`');
-             }
+         return code;
+       }
 
-             this.description = "Counter";
-             this.name = "ctr";
+       var whichPolygon_1 = whichPolygon;
 
-             if (!(counter instanceof Counter)) {
-               counter = new Counter(counter);
-             }
+       function whichPolygon(data) {
+         var bboxes = [];
 
-             this._counter = counter;
-             this._remainingCounter = null;
-             this._remainingCounterIndex = 16;
-             this._aes = new AES(key);
-           };
+         for (var i = 0; i < data.features.length; i++) {
+           var feature = data.features[i];
+           var coords = feature.geometry.coordinates;
 
-           ModeOfOperationCTR.prototype.encrypt = function (plaintext) {
-             var encrypted = coerceArray(plaintext, true);
+           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));
+             }
+           }
+         }
 
-             for (var i = 0; i < encrypted.length; i++) {
-               if (this._remainingCounterIndex === 16) {
-                 this._remainingCounter = this._aes.encrypt(this._counter._counter);
-                 this._remainingCounterIndex = 0;
+         var tree = rbush_1().load(bboxes);
 
-                 this._counter.increment();
-               }
+         function query(p, multi) {
+           var output = [],
+               result = tree.search({
+             minX: p[0],
+             minY: p[1],
+             maxX: p[0],
+             maxY: p[1]
+           });
 
-               encrypted[i] ^= this._remainingCounter[this._remainingCounterIndex++];
+           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 encrypted;
-           }; // Decryption is symetric
-
+           return multi && output.length ? output : null;
+         }
 
-           ModeOfOperationCTR.prototype.decrypt = ModeOfOperationCTR.prototype.encrypt; ///////////////////////
-           // Padding
-           // See:https://tools.ietf.org/html/rfc2315
+         query.tree = tree;
 
-           function pkcs7pad(data) {
-             data = coerceArray(data, true);
-             var padder = 16 - data.length % 16;
-             var result = createArray(data.length + padder);
-             copyArray(data, result);
+         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 = data.length; i < result.length; i++) {
-               result[i] = padder;
+           for (var i = 0; i < result.length; i++) {
+             if (polygonIntersectsBBox(result[i].coords, bbox)) {
+               output.push(result[i].props);
              }
-
-             return result;
            }
 
-           function pkcs7strip(data) {
-             data = coerceArray(data, true);
-
-             if (data.length < 16) {
-               throw new Error('PKCS#7 invalid length');
-             }
+           return output;
+         };
 
-             var padder = data[data.length - 1];
+         return query;
+       }
 
-             if (padder > 16) {
-               throw new Error('PKCS#7 padding byte out of range');
-             }
+       function polygonIntersectsBBox(polygon, bbox) {
+         var bboxCenter = [(bbox[0] + bbox[2]) / 2, (bbox[1] + bbox[3]) / 2];
+         if (insidePolygon(polygon, bboxCenter)) return true;
 
-             var length = data.length - padder;
+         for (var i = 0; i < polygon.length; i++) {
+           if (lineclip_1(polygon[i], bbox).length > 0) return true;
+         }
 
-             for (var i = 0; i < padder; i++) {
-               if (data[length + i] !== padder) {
-                 throw new Error('PKCS#7 invalid padding byte');
-               }
-             }
+         return false;
+       } // ray casting algorithm for detecting if point is in polygon
 
-             var result = createArray(length);
-             copyArray(data, result, 0, 0, length);
-             return result;
-           } ///////////////////////
-           // Exporting
-           // The block cipher
 
+       function insidePolygon(rings, p) {
+         var inside = false;
 
-           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
+         for (var i = 0, len = rings.length; i < len; i++) {
+           var ring = rings[i];
 
-           {
-             module.exports = aesjs; // RequireJS/AMD
-             // http://www.requirejs.org/docs/api.html
-             // https://github.com/amdjs/amdjs-api/wiki/AMD
+           for (var j = 0, len2 = ring.length, k = len2 - 1; j < len2; k = j++) {
+             if (rayIntersect(p, ring[j], ring[k])) inside = !inside;
            }
-         })();
-       });
-
-       // 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;
+         return inside;
        }
 
-       function utilCleanTags(tags) {
-         var out = {};
+       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];
+       }
 
-         for (var k in tags) {
-           if (!k) continue;
-           var v = tags[k];
+       function treeItem(coords, props) {
+         var item = {
+           minX: Infinity,
+           minY: Infinity,
+           maxX: -Infinity,
+           maxY: -Infinity,
+           coords: coords,
+           props: props
+         };
 
-           if (v !== undefined) {
-             out[k] = cleanValue(k, v);
-           }
+         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 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;
-         }
+         return item;
        }
 
-       // Like selection.property('value', ...), but avoids no-op value sets,
-       // which can result in layout/repaint thrashing in some situations.
-       function utilGetSetValue(selection, value) {
-         function d3_selection_value(value) {
-           function valueNull() {
-             delete this.value;
-           }
-
-           function valueConstant() {
-             if (this.value !== value) {
-               this.value = value;
-             }
-           }
-
-           function valueFunction() {
-             var x = value.apply(this, arguments);
-
-             if (x === null || x === undefined) {
-               delete this.value;
-             } else if (this.value !== x) {
-               this.value = x;
-             }
-           }
-
-           return value === null || value === undefined ? valueNull : typeof value === 'function' ? valueFunction : valueConstant;
+       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]]]]
          }
-
-         if (arguments.length === 1) {
-           return selection.property('value');
+       }, {
+         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]]]]
          }
-
-         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;
-           }
+       }, {
+         type: "Feature",
+         properties: {
+           wikidata: "Q25",
+           nameEn: "Wales",
+           aliases: ["GB-WLS"],
+           country: "GB",
+           groups: ["Q23666", "Q3336843", "154", "150", "UN"],
+           driveSide: "left",
+           roadSpeedUnit: "mph",
+           roadHeightUnit: "ft",
+           callingCodes: ["44"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[-3.5082, 53.54318], [-5.37267, 53.63269], [-6.03913, 51.13217], [-3.20563, 51.31615], [-2.66336, 51.59504], [-2.66234, 51.83555], [-2.74277, 51.84367], [-2.78742, 51.88833], [-2.8818, 51.93196], [-2.97111, 51.90456], [-3.12638, 52.08114], [-3.09289, 52.20546], [-3.00785, 52.2753], [-2.99701, 52.323], [-2.95364, 52.3501], [-3.04687, 52.34504], [-3.22754, 52.42526], [-3.22971, 52.45344], [-3.13359, 52.49174], [-3.03603, 52.49969], [-2.99701, 52.551], [-3.00929, 52.57774], [-3.08662, 52.54811], [-3.09746, 52.53077], [-3.12926, 52.5286], [-3.13648, 52.58208], [-3.04398, 52.65435], [-3.01724, 52.72083], [-2.95581, 52.71794], [-3.01001, 52.76636], [-3.08734, 52.77504], [-3.16105, 52.79599], [-3.15744, 52.84947], [-3.13576, 52.895], [-2.97243, 52.9651], [-2.92401, 52.93836], [-2.85897, 52.94487], [-2.80549, 52.89428], [-2.72221, 52.92969], [-2.7251, 52.98389], [-2.83133, 52.99184], [-2.89131, 53.09374], [-2.87469, 53.12337], [-2.90649, 53.10964], [-2.98598, 53.15589], [-2.92022, 53.17685], [-2.92329, 53.19383], [-3.03675, 53.25092], [-3.08228, 53.25526], [-3.5082, 53.54318]]]]
          }
-
-         function capture(d3_event) {
-           testBindings(d3_event, true);
+       }, {
+         type: "Feature",
+         properties: {
+           wikidata: "Q26",
+           nameEn: "Northern Ireland",
+           aliases: ["GB-NIR"],
+           country: "GB",
+           groups: ["Q22890", "Q3336843", "154", "150", "UN"],
+           driveSide: "left",
+           roadSpeedUnit: "mph",
+           roadHeightUnit: "ft",
+           callingCodes: ["44"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[-6.34755, 55.49206], [-7.2471, 55.06933], [-7.34464, 55.04688], [-7.4033, 55.00391], [-7.40004, 54.94498], [-7.44404, 54.9403], [-7.4473, 54.87003], [-7.47626, 54.83084], [-7.54508, 54.79401], [-7.54671, 54.74606], [-7.64449, 54.75265], [-7.75041, 54.7103], [-7.83352, 54.73854], [-7.93293, 54.66603], [-7.70315, 54.62077], [-7.8596, 54.53671], [-7.99812, 54.54427], [-8.04538, 54.48941], [-8.179, 54.46763], [-8.04555, 54.36292], [-7.87101, 54.29299], [-7.8596, 54.21779], [-7.81397, 54.20159], [-7.69501, 54.20731], [-7.55812, 54.12239], [-7.4799, 54.12239], [-7.44567, 54.1539], [-7.32834, 54.11475], [-7.30553, 54.11869], [-7.34005, 54.14698], [-7.29157, 54.17191], [-7.28017, 54.16714], [-7.29687, 54.1354], [-7.29493, 54.12013], [-7.26316, 54.13863], [-7.25012, 54.20063], [-7.14908, 54.22732], [-7.19145, 54.31296], [-7.02034, 54.4212], [-6.87775, 54.34682], [-6.85179, 54.29176], [-6.81583, 54.22791], [-6.74575, 54.18788], [-6.70175, 54.20218], [-6.6382, 54.17071], [-6.66264, 54.0666], [-6.62842, 54.03503], [-6.47849, 54.06947], [-6.36605, 54.07234], [-6.36279, 54.11248], [-6.32694, 54.09337], [-6.29003, 54.11278], [-6.26218, 54.09785], [-5.83481, 53.87749], [-4.69044, 54.3629], [-6.34755, 55.49206]]]]
          }
-
-         function bubble(d3_event) {
-           var tagName = select(d3_event.target).node().tagName;
-
-           if (tagName === 'INPUT' || tagName === 'SELECT' || tagName === 'TEXTAREA') {
-             return;
-           }
-
-           testBindings(d3_event, false);
+       }, {
+         type: "Feature",
+         properties: {
+           wikidata: "Q35",
+           nameEn: "Denmark",
+           country: "DK",
+           groups: ["EU", "154", "150", "UN"],
+           callingCodes: ["45"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[12.16597, 56.60205], [10.40861, 58.38489], [7.28637, 57.35913], [8.02459, 55.09613], [8.45719, 55.06747], [8.55769, 54.91837], [8.63979, 54.91069], [8.76387, 54.8948], [8.81178, 54.90518], [8.92795, 54.90452], [9.04629, 54.87249], [9.14275, 54.87421], [9.20571, 54.85841], [9.24631, 54.84726], [9.23445, 54.83432], [9.2474, 54.8112], [9.32771, 54.80602], [9.33849, 54.80233], [9.36496, 54.81749], [9.38532, 54.83968], [9.41213, 54.84254], [9.43155, 54.82586], [9.4659, 54.83131], [9.58937, 54.88785], [9.62734, 54.88057], [9.61187, 54.85548], [9.73563, 54.8247], [9.89314, 54.84171], [10.16755, 54.73883], [10.31111, 54.65968], [11.00303, 54.63689], [11.90309, 54.38543], [12.85844, 54.82438], [13.93395, 54.84044], [15.36991, 54.73263], [15.79951, 55.54655], [14.89259, 55.5623], [14.28399, 55.1553], [12.84405, 55.13257], [12.60345, 55.42675], [12.88472, 55.63369], [12.6372, 55.91371], [12.65312, 56.04345], [12.07466, 56.29488], [12.16597, 56.60205]]]]
          }
-
-         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,
-         // 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$1 = 95,
-           n = 0;
-
-       while (++i$1 < 106) {
-         utilKeybinding.keyCodes['num-' + n] = i$1;
-         ++n;
-       } // 0-9
-
-
-       i$1 = 47;
-       n = 0;
-
-       while (++i$1 < 58) {
-         utilKeybinding.keyCodes[n] = i$1;
-         ++n;
-       } // F1-F25
-
-
-       i$1 = 111;
-       n = 1;
-
-       while (++i$1 < 136) {
-         utilKeybinding.keyCodes['f' + n] = i$1;
-         ++n;
-       } // a-z
-
-
-       i$1 = 64;
-
-       while (++i$1 < 91) {
-         utilKeybinding.keyCodes[String.fromCharCode(i$1).toLowerCase()] = i$1;
-       }
-
-       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]);
+       }, {
+         type: "Feature",
+         properties: {
+           wikidata: "Q55",
+           nameEn: "Netherlands",
+           country: "NL",
+           groups: ["EU", "155", "150", "UN"],
+           callingCodes: ["31"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[5.45168, 54.20039], [2.56575, 51.85301], [3.36263, 51.37112], [3.38696, 51.33436], [3.35847, 51.31572], [3.38289, 51.27331], [3.41704, 51.25933], [3.43488, 51.24135], [3.52698, 51.2458], [3.51502, 51.28697], [3.58939, 51.30064], [3.78999, 51.25766], [3.78783, 51.2151], [3.90125, 51.20371], [3.97889, 51.22537], [4.01957, 51.24504], [4.05165, 51.24171], [4.16721, 51.29348], [4.24024, 51.35371], [4.21923, 51.37443], [4.33265, 51.37687], [4.34086, 51.35738], [4.39292, 51.35547], [4.43777, 51.36989], [4.38064, 51.41965], [4.39747, 51.43316], [4.38122, 51.44905], [4.47736, 51.4778], [4.5388, 51.48184], [4.54675, 51.47265], [4.52846, 51.45002], [4.53521, 51.4243], [4.57489, 51.4324], [4.65442, 51.42352], [4.72935, 51.48424], [4.74578, 51.48937], [4.77321, 51.50529], [4.78803, 51.50284], [4.84139, 51.4799], [4.82409, 51.44736], [4.82946, 51.4213], [4.78314, 51.43319], [4.76577, 51.43046], [4.77229, 51.41337], [4.78941, 51.41102], [4.84988, 51.41502], [4.90016, 51.41404], [4.92152, 51.39487], [5.00393, 51.44406], [5.0106, 51.47167], [5.03281, 51.48679], [5.04774, 51.47022], [5.07891, 51.4715], [5.10456, 51.43163], [5.07102, 51.39469], [5.13105, 51.34791], [5.13377, 51.31592], [5.16222, 51.31035], [5.2002, 51.32243], [5.24244, 51.30495], [5.22542, 51.26888], [5.23814, 51.26064], [5.26461, 51.26693], [5.29716, 51.26104], [5.33886, 51.26314], [5.347, 51.27502], [5.41672, 51.26248], [5.4407, 51.28169], [5.46519, 51.2849], [5.48476, 51.30053], [5.515, 51.29462], [5.5569, 51.26544], [5.5603, 51.22249], [5.65145, 51.19788], [5.65528, 51.18736], [5.70344, 51.1829], [5.74617, 51.18928], [5.77735, 51.17845], [5.77697, 51.1522], [5.82564, 51.16753], [5.85508, 51.14445], [5.80798, 51.11661], [5.8109, 51.10861], [5.83226, 51.10585], [5.82921, 51.09328], [5.79903, 51.09371], [5.79835, 51.05834], [5.77258, 51.06196], [5.75961, 51.03113], [5.77688, 51.02483], [5.76242, 50.99703], [5.71864, 50.96092], [5.72875, 50.95428], [5.74752, 50.96202], [5.75927, 50.95601], [5.74644, 50.94723], [5.72545, 50.92312], [5.72644, 50.91167], [5.71626, 50.90796], [5.69858, 50.91046], [5.67886, 50.88142], [5.64504, 50.87107], [5.64009, 50.84742], [5.65259, 50.82309], [5.70118, 50.80764], [5.68995, 50.79641], [5.70107, 50.7827], [5.68091, 50.75804], [5.69469, 50.75529], [5.72216, 50.76398], [5.73904, 50.75674], [5.74356, 50.7691], [5.76533, 50.78159], [5.77513, 50.78308], [5.80673, 50.7558], [5.84548, 50.76542], [5.84888, 50.75448], [5.88734, 50.77092], [5.89129, 50.75125], [5.89132, 50.75124], [5.95942, 50.7622], [5.97545, 50.75441], [6.01976, 50.75398], [6.02624, 50.77453], [5.97497, 50.79992], [5.98404, 50.80988], [6.00462, 50.80065], [6.02328, 50.81694], [6.01921, 50.84435], [6.05623, 50.8572], [6.05702, 50.85179], [6.07431, 50.84674], [6.07693, 50.86025], [6.08805, 50.87223], [6.07486, 50.89307], [6.09297, 50.92066], [6.01615, 50.93367], [6.02697, 50.98303], [5.95282, 50.98728], [5.90296, 50.97356], [5.90493, 51.00198], [5.87849, 51.01969], [5.86735, 51.05182], [5.9134, 51.06736], [5.9541, 51.03496], [5.98292, 51.07469], [6.16706, 51.15677], [6.17384, 51.19589], [6.07889, 51.17038], [6.07889, 51.24432], [6.16977, 51.33169], [6.22674, 51.36135], [6.22641, 51.39948], [6.20654, 51.40049], [6.21724, 51.48568], [6.18017, 51.54096], [6.09055, 51.60564], [6.11759, 51.65609], [6.02767, 51.6742], [6.04091, 51.71821], [5.95003, 51.7493], [5.98665, 51.76944], [5.94568, 51.82786], [5.99848, 51.83195], [6.06705, 51.86136], [6.10337, 51.84829], [6.16902, 51.84094], [6.11551, 51.89769], [6.15349, 51.90439], [6.21443, 51.86801], [6.29872, 51.86801], [6.30593, 51.84998], [6.40704, 51.82771], [6.38815, 51.87257], [6.47179, 51.85395], [6.50231, 51.86313], [6.58556, 51.89386], [6.68386, 51.91861], [6.72319, 51.89518], [6.82357, 51.96711], [6.83035, 51.9905], [6.68128, 52.05052], [6.76117, 52.11895], [6.83984, 52.11728], [6.97189, 52.20329], [6.9897, 52.2271], [7.03729, 52.22695], [7.06365, 52.23789], [7.02703, 52.27941], [7.07044, 52.37805], [7.03417, 52.40237], [6.99041, 52.47235], [6.94293, 52.43597], [6.69507, 52.488], [6.71641, 52.62905], [6.77307, 52.65375], [7.04557, 52.63318], [7.07253, 52.81083], [7.21694, 53.00742], [7.17898, 53.13817], [7.22681, 53.18165], [7.21679, 53.20058], [7.19052, 53.31866], [7.00198, 53.32672], [6.91025, 53.44221], [5.45168, 54.20039]], [[4.93295, 51.44945], [4.95244, 51.45207], [4.9524, 51.45014], [4.93909, 51.44632], [4.93295, 51.44945]], [[4.91493, 51.4353], [4.91935, 51.43634], [4.92227, 51.44252], [4.91811, 51.44621], [4.92287, 51.44741], [4.92811, 51.4437], [4.92566, 51.44273], [4.92815, 51.43856], [4.92879, 51.44161], [4.93544, 51.44634], [4.94025, 51.44193], [4.93416, 51.44185], [4.93471, 51.43861], [4.94265, 51.44003], [4.93986, 51.43064], [4.92952, 51.42984], [4.92652, 51.43329], [4.91493, 51.4353]]]]
          }
-
-         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';
+       }, {
+         type: "Feature",
+         properties: {
+           wikidata: "Q782",
+           nameEn: "Hawaii",
+           aliases: ["US-HI"],
+           country: "US",
+           groups: ["Q35657", "061", "009", "UN"],
+           roadSpeedUnit: "mph",
+           roadHeightUnit: "ft",
+           callingCodes: ["1"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[-177.8563, 29.18961], [-179.49839, 27.86265], [-151.6784, 9.55515], [-154.05867, 45.51124], [-177.5224, 27.7635], [-177.8563, 29.18961]]]]
          }
-
-         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));
+       }, {
+         type: "Feature",
+         properties: {
+           wikidata: "Q797",
+           nameEn: "Alaska",
+           aliases: ["US-AK"],
+           country: "US",
+           groups: ["Q35657", "021", "003", "019", "UN"],
+           roadSpeedUnit: "mph",
+           roadHeightUnit: "ft",
+           callingCodes: ["1"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[169.34848, 52.47228], [180, 51.0171], [179.84401, 55.10087], [169.34848, 52.47228]]], [[[-168.95635, 65.98512], [-169.03888, 65.48473], [-172.76104, 63.77445], [-179.55295, 57.62081], [-179.55295, 50.81807], [-133.92876, 54.62289], [-130.61931, 54.70835], [-130.64499, 54.76912], [-130.44184, 54.85377], [-130.27203, 54.97174], [-130.18765, 55.07744], [-130.08035, 55.21556], [-129.97513, 55.28029], [-130.15373, 55.74895], [-130.00857, 55.91344], [-130.00093, 56.00325], [-130.10173, 56.12178], [-130.33965, 56.10849], [-130.77769, 56.36185], [-131.8271, 56.62247], [-133.38523, 58.42773], [-133.84645, 58.73543], [-134.27175, 58.8634], [-134.48059, 59.13231], [-134.55699, 59.1297], [-134.7047, 59.2458], [-135.00267, 59.28745], [-135.03069, 59.56208], [-135.48007, 59.79937], [-136.31566, 59.59083], [-136.22381, 59.55526], [-136.33727, 59.44466], [-136.47323, 59.46617], [-136.52365, 59.16752], [-136.82619, 59.16198], [-137.4925, 58.89415], [-137.60623, 59.24465], [-138.62145, 59.76431], [-138.71149, 59.90728], [-139.05365, 59.99655], [-139.20603, 60.08896], [-139.05831, 60.35205], [-139.68991, 60.33693], [-139.98024, 60.18027], [-140.45648, 60.30919], [-140.5227, 60.22077], [-141.00116, 60.30648], [-140.97446, 84.39275], [-168.25765, 71.99091], [-168.95635, 65.98512]]]]
          }
-
-         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;
+       }, {
+         type: "Feature",
+         properties: {
+           wikidata: "Q3492",
+           nameEn: "Sumatra",
+           aliases: ["ID-SM"],
+           country: "ID",
+           groups: ["035", "142", "UN"],
+           driveSide: "left",
+           callingCodes: ["62"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[109.82788, 2.86812], [110.90339, 7.52694], [105.01437, 3.24936], [104.56723, 1.44271], [104.34728, 1.33529], [104.12282, 1.27714], [104.03085, 1.26954], [103.74084, 1.12902], [103.66049, 1.18825], [103.56591, 1.19719], [103.03657, 1.30383], [96.11174, 6.69841], [74.28481, -3.17525], [102.92489, -8.17146], [106.32259, -5.50116], [106.38511, -5.16715], [109.17017, -4.07401], [109.3962, -2.07276], [108.50935, -2.01066], [107.94791, 1.06924], [109.82788, 2.86812]]]]
          }
-
-         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 = [];
-
-           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;
+       }, {
+         type: "Feature",
+         properties: {
+           wikidata: "Q3757",
+           nameEn: "Java",
+           aliases: ["ID-JW"],
+           country: "ID",
+           groups: ["035", "142", "UN"],
+           driveSide: "left",
+           callingCodes: ["62"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[109.17017, -4.07401], [106.38511, -5.16715], [106.32259, -5.50116], [102.92489, -8.17146], [116.22542, -10.49172], [114.39575, -8.2889], [114.42235, -8.09762], [114.92859, -7.49253], [116.33992, -7.56171], [116.58433, -5.30385], [109.17017, -4.07401]]]]
          }
-         /**
-          * getTiles() returns an array of tiles that cover the map view
-          */
-
-
-         tiler.getTiles = function (projection) {
-           var origin = [projection.scale() * Math.PI - projection.translate()[0], projection.scale() * Math.PI - projection.translate()[1]];
-           this.size(projection.clipExtent()[1]).scale(projection.scale() * 2 * Math.PI).translate(projection.translate());
-           var tiles = tiler();
-           var ts = tiles.scale;
-           return tiles.map(function (tile) {
-             if (_skipNullIsland && nearNullIsland(tile)) {
-               return false;
-             }
-
-             var x = tile[0] * ts - origin[0];
-             var y = tile[1] * ts - origin[1];
-             return {
-               id: tile.toString(),
-               xyz: tile,
-               extent: geoExtent(projection.invert([x, y + ts]), projection.invert([x + ts, y]))
-             };
-           }).filter(Boolean);
-         };
-         /**
-          * getGeoJSON() returns a FeatureCollection for debugging tiles
-          */
-
-
-         tiler.getGeoJSON = function (projection) {
-           var features = tiler.getTiles(projection).map(function (tile) {
-             return {
-               type: 'Feature',
-               properties: {
-                 id: tile.id,
-                 name: tile.id
-               },
-               geometry: {
-                 type: 'Polygon',
-                 coordinates: [tile.extent.polygon()]
-               }
-             };
-           });
-           return {
-             type: 'FeatureCollection',
-             features: features
-           };
-         };
-
-         tiler.tileSize = function (val) {
-           if (!arguments.length) return _tileSize;
-           _tileSize = val;
-           return tiler;
-         };
-
-         tiler.zoomExtent = function (val) {
-           if (!arguments.length) return _zoomExtent;
-           _zoomExtent = val;
-           return tiler;
-         };
-
-         tiler.size = function (val) {
-           if (!arguments.length) return _size;
-           _size = val;
-           return tiler;
-         };
-
-         tiler.scale = function (val) {
-           if (!arguments.length) return _scale;
-           _scale = val;
-           return tiler;
-         };
-
-         tiler.translate = function (val) {
-           if (!arguments.length) return _translate;
-           _translate = val;
-           return tiler;
-         }; // number to extend the rows/columns beyond those covering the viewport
-
-
-         tiler.margin = function (val) {
-           if (!arguments.length) return _margin;
-           _margin = +val;
-           return tiler;
-         };
-
-         tiler.skipNullIsland = function (val) {
-           if (!arguments.length) return _skipNullIsland;
-           _skipNullIsland = val;
-           return tiler;
-         };
-
-         return tiler;
-       }
-
-       function utilTriggerEvent(target, type) {
-         target.each(function () {
-           var evt = document.createEvent('HTMLEvents');
-           evt.initEvent(type, true, true);
-           this.dispatchEvent(evt);
-         });
-       }
-
-       var _mainLocalizer = coreLocalizer(); // singleton
-
-
-       var _t = _mainLocalizer.t;
-       // coreLocalizer manages language and locale parameters including translated strings
-       //
-
-       function coreLocalizer() {
-         var localizer = {};
-         var _dataLanguages = {}; // `_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;
-
-           if (typeof codes === 'string') {
-             // be generous and accept delimited strings as input
-             _preferredLocaleCodes = codes.split(/,|;| /gi).filter(Boolean);
-           } else {
-             _preferredLocaleCodes = codes;
-           }
-
-           return localizer;
-         };
-
-         var _loadPromise;
-
-         localizer.ensureLoaded = function () {
-           if (_loadPromise) return _loadPromise;
-           return _loadPromise = Promise.all([// load the list of languages
-           _mainFileFetcher.get('languages'), // load the list of supported locales
-           _mainFileFetcher.get('locales')]).then(function (results) {
-             _dataLanguages = results[0];
-             _dataLocales = results[1];
-           }).then(function () {
-             var requestedLocales = (_preferredLocaleCodes || []). // List of locales preferred by the browser in priority order.
-             concat(utilDetect().browserLocales) // fallback to English since it's the only guaranteed complete language
-             .concat(['en']);
-
-             _localeCodes = localesToUseFrom(requestedLocales); // Run iD in the highest-priority locale; the rest are fallbacks
-
-             _localeCode = _localeCodes[0]; // Will always return the index for `en` if nothing else
-
-             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
-
-
-             var loadStringsPromises = _localeCodes.slice(0, fullCoverageIndex + 1).map(function (code) {
-               return localizer.loadLocale(code);
-             });
-
-             return Promise.all(loadStringsPromises);
-           }).then(function () {
-             updateForCurrentLocale();
-           })["catch"](function (err) {
-             return console.error(err);
-           }); // eslint-disable-line
-         }; // Returns the locales from `requestedLocales` supported by iD that we should use
-
-
-         function localesToUseFrom(requestedLocales) {
-           var supportedLocales = _dataLocales;
-           var toUse = [];
-
-           for (var i in requestedLocales) {
-             var locale = requestedLocales[i];
-             if (supportedLocales[locale]) toUse.push(locale);
-
-             if (locale.includes('-')) {
-               // Full locale ('es-ES'), add fallback to the base ('es')
-               var langPart = locale.split('-')[0];
-               if (supportedLocales[langPart]) toUse.push(langPart);
-             }
-           } // remove duplicates
-
-
-           return utilArrayUniq(toUse);
+       }, {
+         type: "Feature",
+         properties: {
+           wikidata: "Q3795",
+           nameEn: "Kalimantan",
+           aliases: ["ID-KA"],
+           country: "ID",
+           groups: ["Q36117", "035", "142", "UN"],
+           driveSide: "left",
+           callingCodes: ["62"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[120.02464, 2.83703], [118.06469, 4.16638], [117.67641, 4.16535], [117.47313, 4.18857], [117.25801, 4.35108], [115.90217, 4.37708], [115.58276, 3.93499], [115.53713, 3.14776], [115.11343, 2.82879], [115.1721, 2.49671], [114.80706, 2.21665], [114.80706, 1.92351], [114.57892, 1.5], [114.03788, 1.44787], [113.64677, 1.23933], [113.01448, 1.42832], [113.021, 1.57819], [112.48648, 1.56516], [112.2127, 1.44135], [112.15679, 1.17004], [111.94553, 1.12016], [111.82846, 0.99349], [111.55434, 0.97864], [111.22979, 1.08326], [110.62374, 0.873], [110.49182, 0.88088], [110.35354, 0.98869], [109.66397, 1.60425], [109.66397, 1.79972], [109.57923, 1.80624], [109.53794, 1.91771], [109.62558, 1.99182], [109.82788, 2.86812], [107.94791, 1.06924], [108.50935, -2.01066], [109.3962, -2.07276], [109.17017, -4.07401], [116.58433, -5.30385], [120.02464, 2.83703]]]]
          }
-
-         function updateForCurrentLocale() {
-           if (!_localeCode) return;
-           _languageCode = _localeCode.split('-')[0];
-           var currentData = _dataLocales[_localeCode] || _dataLocales[_languageCode];
-           var hash = utilStringQs(window.location.hash);
-
-           if (hash.rtl === 'true') {
-             _textDirection = 'rtl';
-           } else if (hash.rtl === 'false') {
-             _textDirection = 'ltr';
-           } else {
-             _textDirection = currentData && currentData.rtl ? 'rtl' : 'ltr';
-           }
-
-           var locale = _localeCode;
-           if (locale.toLowerCase() === 'en-us') locale = 'en';
-           _languageNames = _localeStrings[locale].languageNames;
-           _scriptNames = _localeStrings[locale].scriptNames;
-           _usesMetric = _localeCode.slice(-3).toLowerCase() !== '-us';
+       }, {
+         type: "Feature",
+         properties: {
+           wikidata: "Q3803",
+           nameEn: "Lesser Sunda Islands",
+           aliases: ["ID-NU"],
+           country: "ID",
+           groups: ["035", "142", "UN"],
+           driveSide: "left",
+           callingCodes: ["62"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[116.96967, -8.01483], [114.92859, -7.49253], [114.42235, -8.09762], [114.39575, -8.2889], [116.22542, -10.49172], [122.14954, -11.52517], [125.68138, -9.85176], [125.09025, -9.46406], [124.97892, -9.19281], [125.04044, -9.17093], [125.09434, -9.19669], [125.18907, -9.16434], [125.18632, -9.03142], [125.11764, -8.96359], [124.97742, -9.08128], [124.94011, -8.85617], [124.46701, -9.13002], [124.45971, -9.30263], [124.38554, -9.3582], [124.35258, -9.43002], [124.3535, -9.48493], [124.28115, -9.50453], [124.28115, -9.42189], [124.21247, -9.36904], [124.14517, -9.42324], [124.10539, -9.41206], [124.04286, -9.34243], [124.04628, -9.22671], [124.33472, -9.11416], [124.92337, -8.75859], [125.87688, -7.49892], [116.96967, -8.01483]]]]
          }
-         /* Locales */
-         // Returns a Promise to load the strings for the requested locale
-
-
-         localizer.loadLocale = function (requested) {
-           if (!_dataLocales) {
-             return Promise.reject('loadLocale called before init');
-           }
-
-           var locale = requested; // US English is the default
-
-           if (locale.toLowerCase() === 'en-us') locale = 'en';
-
-           if (!_dataLocales[locale]) {
-             return Promise.reject("Unsupported locale: ".concat(requested));
-           }
-
-           if (_localeStrings[locale]) {
-             // already loaded
-             return Promise.resolve(locale);
-           }
-
-           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;
-           });
-         };
-
-         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`
-
-
-         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';
+       }, {
+         type: "Feature",
+         properties: {
+           wikidata: "Q3812",
+           nameEn: "Sulawesi",
+           aliases: ["ID-SL"],
+           country: "ID",
+           groups: ["035", "142", "UN"],
+           driveSide: "left",
+           callingCodes: ["62"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[128.34321, 3.90322], [126.69413, 6.02692], [119.56457, 0.90759], [116.58433, -5.30385], [116.33992, -7.56171], [116.96967, -8.01483], [125.87688, -7.49892], [123.78965, -0.86805], [128.34321, 3.90322]]]]
          }
-         /**
-         * Try to find that string in `locale` or the current `_localeCode` matching
-         * the given `stringId`. If no string can be found in the requested locale,
-         * we'll recurse down all the `_localeCodes` until one is found.
-         *
-         * @param  {string}   stringId      string identifier
-         * @param  {object?}  replacements  token replacements and default string
-         * @param  {string?}  locale        locale to use (defaults to currentLocale)
-         * @return {string?}  localized string
-         */
-
-
-         localizer.tInfo = function (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
-
-           if (stringsKey.toLowerCase() === 'en-us') stringsKey = 'en';
-           var result = _localeStrings[stringsKey];
-
-           while (result !== undefined && path.length) {
-             result = result[path.pop()];
-           }
-
-           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';
-                 });
-
-                 if (number !== undefined) {
-                   var rule = pluralRule(number, locale);
-
-                   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];
-
-                   if (typeof value === 'number' && value.toLocaleString) {
-                     // format numbers for the locale
-                     value = value.toLocaleString(locale, {
-                       style: 'decimal',
-                       useGrouping: true,
-                       minimumFractionDigits: 0
-                     });
-                   }
-
-                   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(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
-             };
-           }
-
-           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
-
-
-           if (options && options.localOnly) return null;
-           var langInfo = _dataLanguages[code];
-
-           if (langInfo) {
-             if (langInfo.nativeName) {
-               // name in native language
-               // e.g. "Deutsch (de)"
-               return localizer.t('translate.language_and_code', {
-                 language: langInfo.nativeName,
-                 code: code
-               });
-             } else if (langInfo.base && langInfo.script) {
-               var base = langInfo.base; // the code of the language this is based on
-
-               if (_languageNames[base]) {
-                 // base language name in locale language
-                 var scriptCode = langInfo.script;
-                 var script = _scriptNames[scriptCode] || scriptCode; // e.g. "Serbian (Cyrillic)"
-
-                 return localizer.t('translate.language_and_code', {
-                   language: _languageNames[base],
-                   code: script
-                 });
-               } else if (_dataLanguages[base] && _dataLanguages[base].nativeName) {
-                 // e.g. "српски (sr-Cyrl)"
-                 return localizer.t('translate.language_and_code', {
-                   language: _dataLanguages[base].nativeName,
-                   code: code
-                 });
-               }
-             }
-           }
-
-           return code; // if not found, use the code
-         };
-
-         return localizer;
-       }
-
-       // `presetCollection` is a wrapper around an `Array` of presets `collection`,
-       // and decorated with some extra methods for searching and matching geometry
-       //
-
-       function presetCollection(collection) {
-         var MAXRESULTS = 50;
-         var _this = {};
-         var _memo = {};
-         _this.collection = collection;
-
-         _this.item = function (id) {
-           if (_memo[id]) return _memo[id];
-
-           var found = _this.collection.find(function (d) {
-             return d.id === id;
-           });
-
-           if (found) _memo[id] = found;
-           return found;
-         };
-
-         _this.index = function (id) {
-           return _this.collection.findIndex(function (d) {
-             return d.id === id;
-           });
-         };
-
-         _this.matchGeometry = function (geometry) {
-           return presetCollection(_this.collection.filter(function (d) {
-             return d.matchGeometry(geometry);
-           }));
-         };
-
-         _this.matchAllGeometry = function (geometries) {
-           return presetCollection(_this.collection.filter(function (d) {
-             return d && d.matchAllGeometry(geometries);
-           }));
-         };
-
-         _this.matchAnyGeometry = function (geometries) {
-           return presetCollection(_this.collection.filter(function (d) {
-             return geometries.some(function (geom) {
-               return d.matchGeometry(geom);
-             });
-           }));
-         };
-
-         _this.fallback = function (geometry) {
-           var id = geometry;
-           if (id === 'vertex') id = 'point';
-           return _this.item(id);
-         };
-
-         _this.search = function (value, geometry, countryCode) {
-           if (!value) return _this;
-           value = value.toLowerCase().trim(); // match at name beginning or just after a space (e.g. "office" -> match "Law Office")
-
-           function leading(a) {
-             var index = a.indexOf(value);
-             return index === 0 || a[index - 1] === ' ';
-           } // match at name beginning only
-
-
-           function leadingStrict(a) {
-             var index = a.indexOf(value);
-             return index === 0;
-           }
-
-           function sortNames(a, b) {
-             var aCompare = (a.suggestion ? a.originalName : a.name()).toLowerCase();
-             var bCompare = (b.suggestion ? b.originalName : b.name()).toLowerCase(); // priority if search string matches preset name exactly - #4325
-
-             if (value === aCompare) return -1;
-             if (value === bCompare) return 1; // priority for higher matchScore
-
-             var i = b.originalScore - a.originalScore;
-             if (i !== 0) return i; // priority if search string appears earlier in preset name
-
-             i = aCompare.indexOf(value) - bCompare.indexOf(value);
-             if (i !== 0) return i; // priority for shorter preset names
-
-             return aCompare.length - bCompare.length;
-           }
-
-           var pool = _this.collection;
-
-           if (countryCode) {
-             pool = pool.filter(function (a) {
-               if (a.countryCodes && a.countryCodes.indexOf(countryCode) === -1) return false;
-               if (a.notCountryCodes && a.notCountryCodes.indexOf(countryCode) !== -1) return false;
-               return true;
-             });
-           }
-
-           var searchable = pool.filter(function (a) {
-             return a.searchable !== false && a.suggestion !== true;
-           });
-           var suggestions = pool.filter(function (a) {
-             return a.suggestion === true;
-           }); // matches value to preset.name
-
-           var leading_name = searchable.filter(function (a) {
-             return leading(a.name().toLowerCase());
-           }).sort(sortNames); // matches value to preset suggestion name (original name is unhyphenated)
-
-           var leading_suggestions = suggestions.filter(function (a) {
-             return leadingStrict(a.originalName.toLowerCase());
-           }).sort(sortNames); // matches value to preset.terms values
-
-           var leading_terms = searchable.filter(function (a) {
-             return (a.terms() || []).some(leading);
-           }); // matches value to preset.tags values
-
-           var leading_tag_values = searchable.filter(function (a) {
-             return Object.values(a.tags || {}).filter(function (val) {
-               return val !== '*';
-             }).some(leading);
-           }); // finds close matches to value in preset.name
-
-           var similar_name = searchable.map(function (a) {
-             return {
-               preset: a,
-               dist: utilEditDistance(value, a.name())
-             };
-           }).filter(function (a) {
-             return a.dist + Math.min(value.length - a.preset.name().length, 0) < 3;
-           }).sort(function (a, b) {
-             return a.dist - b.dist;
-           }).map(function (a) {
-             return a.preset;
-           }); // finds close matches to value to preset suggestion name (original name is unhyphenated)
-
-           var similar_suggestions = suggestions.map(function (a) {
-             return {
-               preset: a,
-               dist: utilEditDistance(value, a.originalName.toLowerCase())
-             };
-           }).filter(function (a) {
-             return a.dist + Math.min(value.length - a.preset.originalName.length, 0) < 1;
-           }).sort(function (a, b) {
-             return a.dist - b.dist;
-           }).map(function (a) {
-             return a.preset;
-           }); // finds close matches to value in preset.terms
-
-           var similar_terms = searchable.filter(function (a) {
-             return (a.terms() || []).some(function (b) {
-               return utilEditDistance(value, b) + Math.min(value.length - b.length, 0) < 3;
-             });
-           });
-           var results = leading_name.concat(leading_suggestions, leading_terms, leading_tag_values, similar_name, similar_suggestions, similar_terms).slice(0, MAXRESULTS - 1);
-
-           if (geometry) {
-             if (typeof geometry === 'string') {
-               results.push(_this.fallback(geometry));
-             } else {
-               geometry.forEach(function (geom) {
-                 return results.push(_this.fallback(geom));
-               });
-             }
-           }
-
-           return presetCollection(utilArrayUniq(results));
-         };
-
-         return _this;
-       }
-
-       // `presetCategory` builds a `presetCollection` of member presets,
-       // decorated with some extra methods for searching and matching geometry
-       //
-
-       function presetCategory(categoryID, category, all) {
-         var _this = Object.assign({}, category); // shallow copy
-
-
-         _this.id = categoryID;
-         _this.members = presetCollection(category.members.map(function (presetID) {
-           return all.item(presetID);
-         }).filter(Boolean));
-         _this.geometry = _this.members.collection.reduce(function (acc, preset) {
-           for (var i in preset.geometry) {
-             var geometry = preset.geometry[i];
-
-             if (acc.indexOf(geometry) === -1) {
-               acc.push(geometry);
-             }
-           }
-
-           return acc;
-         }, []);
-
-         _this.matchGeometry = function (geom) {
-           return _this.geometry.indexOf(geom) >= 0;
-         };
-
-         _this.matchAllGeometry = function (geometries) {
-           return _this.members.collection.some(function (preset) {
-             return preset.matchAllGeometry(geometries);
-           });
-         };
-
-         _this.matchScore = function () {
-           return -1;
-         };
-
-         _this.name = function () {
-           return _t("presets.categories.".concat(categoryID, ".name"), {
-             'default': categoryID
-           });
-         };
-
-         _this.nameLabel = function () {
-           return _t.html("presets.categories.".concat(categoryID, ".name"), {
-             'default': categoryID
-           });
-         };
-
-         _this.terms = function () {
-           return [];
-         };
-
-         return _this;
-       }
-
-       // `presetField` decorates a given `field` Object
-       // with some extra methods for searching and matching geometry
-       //
-
-       function presetField(fieldID, field) {
-         var _this = Object.assign({}, field); // shallow copy
-
-
-         _this.id = fieldID; // for use in classes, element ids, css selectors
-
-         _this.safeid = utilSafeClassName(fieldID);
-
-         _this.matchGeometry = function (geom) {
-           return !_this.geometry || _this.geometry.indexOf(geom) !== -1;
-         };
-
-         _this.matchAllGeometry = function (geometries) {
-           return !_this.geometry || geometries.every(function (geom) {
-             return _this.geometry.indexOf(geom) !== -1;
-           });
-         };
-
-         _this.t = function (scope, options) {
-           return _t("presets.fields.".concat(fieldID, ".").concat(scope), options);
-         };
-
-         _this.t.html = function (scope, options) {
-           return _t.html("presets.fields.".concat(fieldID, ".").concat(scope), options);
-         };
-
-         _this.title = function () {
-           return _this.overrideLabel || _this.t('label', {
-             'default': fieldID
-           });
-         };
-
-         _this.label = function () {
-           return _this.overrideLabel || _this.t.html('label', {
-             'default': fieldID
-           });
-         };
-
-         var _placeholder = _this.placeholder;
-
-         _this.placeholder = function () {
-           return _this.t('placeholder', {
-             'default': _placeholder
-           });
-         };
-
-         _this.originalTerms = (_this.terms || []).join();
-
-         _this.terms = function () {
-           return _this.t('terms', {
-             'default': _this.originalTerms
-           }).toLowerCase().trim().split(/\s*,+\s*/);
-         };
-
-         _this.increment = _this.type === 'number' ? _this.increment || 1 : undefined;
-         return _this;
-       }
-
-       // `Array.prototype.lastIndexOf` method
-       // https://tc39.github.io/ecma262/#sec-array.prototype.lastindexof
-       _export({ target: 'Array', proto: true, forced: arrayLastIndexOf !== [].lastIndexOf }, {
-         lastIndexOf: arrayLastIndexOf
-       });
-
-       // `presetPreset` decorates a given `preset` Object
-       // with some extra methods for searching and matching geometry
-       //
-
-       function presetPreset(presetID, preset, addable, allFields, allPresets) {
-         allFields = allFields || {};
-         allPresets = allPresets || {};
-
-         var _this = Object.assign({}, preset); // shallow copy
-
-
-         var _addable = addable || false;
-
-         var _resolvedFields; // cache
-
-
-         var _resolvedMoreFields; // cache
-
-
-         _this.id = presetID;
-         _this.safeid = utilSafeClassName(presetID); // for use in css classes, selectors, element ids
-
-         _this.originalTerms = (_this.terms || []).join();
-         _this.originalName = _this.name || '';
-         _this.originalScore = _this.matchScore || 1;
-         _this.originalReference = _this.reference || {};
-         _this.originalFields = _this.fields || [];
-         _this.originalMoreFields = _this.moreFields || [];
-
-         _this.fields = function () {
-           return _resolvedFields || (_resolvedFields = resolve('fields'));
-         };
-
-         _this.moreFields = function () {
-           return _resolvedMoreFields || (_resolvedMoreFields = resolve('moreFields'));
-         };
-
-         _this.resetFields = function () {
-           return _resolvedFields = _resolvedMoreFields = null;
-         };
-
-         _this.tags = _this.tags || {};
-         _this.addTags = _this.addTags || _this.tags;
-         _this.removeTags = _this.removeTags || _this.addTags;
-         _this.geometry = _this.geometry || [];
-
-         _this.matchGeometry = function (geom) {
-           return _this.geometry.indexOf(geom) >= 0;
-         };
-
-         _this.matchAllGeometry = function (geoms) {
-           return geoms.every(_this.matchGeometry);
-         };
-
-         _this.matchScore = function (entityTags) {
-           var tags = _this.tags;
-           var seen = {};
-           var score = 0; // match on tags
-
-           for (var k in tags) {
-             seen[k] = true;
-
-             if (entityTags[k] === tags[k]) {
-               score += _this.originalScore;
-             } else if (tags[k] === '*' && k in entityTags) {
-               score += _this.originalScore / 2;
-             } else {
-               return -1;
-             }
-           } // boost score for additional matches in addTags - #6802
-
-
-           var addTags = _this.addTags;
-
-           for (var _k in addTags) {
-             if (!seen[_k] && entityTags[_k] === addTags[_k]) {
-               score += _this.originalScore;
-             }
-           }
-
-           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);
-         };
-
-         _this.name = function () {
-           return _this.t('name', {
-             'default': _this.originalName
-           });
-         };
-
-         _this.nameLabel = function () {
-           return _this.t.html('name', {
-             'default': _this.originalName
-           });
-         };
-
-         _this.subtitle = function () {
-           if (_this.suggestion) {
-             var path = presetID.split('/');
-             path.pop(); // remove brand name
-
-             return _t('presets.presets.' + path.join('/') + '.name');
-           }
-
-           return null;
-         };
-
-         _this.subtitleLabel = function () {
-           if (_this.suggestion) {
-             var path = presetID.split('/');
-             path.pop(); // remove brand name
-
-             return _t.html('presets.presets.' + path.join('/') + '.name');
-           }
-
-           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');
-         };
-
-         _this.addable = function (val) {
-           if (!arguments.length) return _addable;
-           _addable = val;
-           return _this;
-         };
-
-         _this.reference = function () {
-           // Lookup documentation on Wikidata...
-           var qid = _this.tags.wikidata || _this.tags['brand:wikidata'] || _this.tags['operator:wikidata'];
-
-           if (qid) {
-             return {
-               qid: qid
-             };
-           } // Lookup documentation on OSM Wikibase...
-
-
-           var key = _this.originalReference.key || Object.keys(utilObjectOmit(_this.tags, 'name'))[0];
-           var value = _this.originalReference.value || _this.tags[key];
-
-           if (value === '*') {
-             return {
-               key: key
-             };
-           } else {
-             return {
-               key: key,
-               value: value
-             };
-           }
-         };
-
-         _this.unsetTags = function (tags, geometry, skipFieldDefaults) {
-           tags = utilObjectOmit(tags, Object.keys(_this.removeTags));
-
-           if (geometry && !skipFieldDefaults) {
-             _this.fields().forEach(function (field) {
-               if (field.matchGeometry(geometry) && field.key && field["default"] === tags[field.key]) {
-                 delete tags[field.key];
-               }
-             });
-           }
-
-           delete tags.area;
-           return tags;
-         };
-
-         _this.setTags = function (tags, geometry, skipFieldDefaults) {
-           var addTags = _this.addTags;
-           tags = Object.assign({}, tags); // shallow copy
-
-           for (var k in addTags) {
-             if (addTags[k] === '*') {
-               tags[k] = 'yes';
-             } else {
-               tags[k] = addTags[k];
-             }
-           } // Add area=yes if necessary.
-           // This is necessary if the geometry is already an area (e.g. user drew an area) AND any of:
-           // 1. chosen preset could be either an area or a line (`barrier=city_wall`)
-           // 2. chosen preset doesn't have a key in osmAreaKeys (`railway=station`)
-
-
-           if (!addTags.hasOwnProperty('area')) {
-             delete tags.area;
-
-             if (geometry === 'area') {
-               var needsAreaTag = true;
-
-               if (_this.geometry.indexOf('line') === -1) {
-                 for (var _k2 in addTags) {
-                   if (_k2 in osmAreaKeys) {
-                     needsAreaTag = false;
-                     break;
-                   }
-                 }
-               }
-
-               if (needsAreaTag) {
-                 tags.area = 'yes';
-               }
-             }
-           }
-
-           if (geometry && !skipFieldDefaults) {
-             _this.fields().forEach(function (field) {
-               if (field.matchGeometry(geometry) && field.key && !tags[field.key] && field["default"]) {
-                 tags[field.key] = field["default"];
-               }
-             });
-           }
-
-           return tags;
-         }; // For a preset without fields, use the fields of the parent preset.
-         // Replace {preset} placeholders with the fields of the specified presets.
-
-
-         function resolve(which) {
-           var fieldIDs = which === 'fields' ? _this.originalFields : _this.originalMoreFields;
-           var resolved = [];
-           fieldIDs.forEach(function (fieldID) {
-             var match = fieldID.match(/\{(.*)\}/);
-
-             if (match !== null) {
-               // a presetID wrapped in braces {}
-               resolved = resolved.concat(inheritFields(match[1], which));
-             } else if (allFields[fieldID]) {
-               // a normal fieldID
-               resolved.push(allFields[fieldID]);
-             } else {
-               console.log("Cannot resolve \"".concat(fieldID, "\" found in ").concat(_this.id, ".").concat(which)); // eslint-disable-line no-console
-             }
-           }); // no fields resolved, so use the parent's if possible
-
-           if (!resolved.length) {
-             var endIndex = _this.id.lastIndexOf('/');
-
-             var parentID = endIndex && _this.id.substring(0, endIndex);
-
-             if (parentID) {
-               resolved = inheritFields(parentID, which);
-             }
-           }
-
-           return utilArrayUniq(resolved); // returns an array of fields to inherit from the given presetID, if found
-
-           function inheritFields(presetID, which) {
-             var parent = allPresets[presetID];
-             if (!parent) return [];
-
-             if (which === 'fields') {
-               return parent.fields().filter(shouldInherit);
-             } else if (which === 'moreFields') {
-               return parent.moreFields();
-             } else {
-               return [];
-             }
-           } // Skip `fields` for the keys which define the preset.
-           // These are usually `typeCombo` fields like `shop=*`
-
-
-           function shouldInherit(f) {
-             if (f.key && _this.tags[f.key] !== undefined && // inherit anyway if multiple values are allowed or just a checkbox
-             f.type !== 'multiCombo' && f.type !== 'semiCombo' && f.type !== 'manyCombo' && f.type !== 'check') return false;
-             return true;
-           }
+       }, {
+         type: "Feature",
+         properties: {
+           wikidata: "Q3827",
+           nameEn: "Maluku Islands",
+           aliases: ["ID-ML"],
+           country: "ID",
+           groups: ["035", "142", "UN"],
+           driveSide: "left",
+           callingCodes: ["62"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[129.63187, 2.21409], [128.34321, 3.90322], [123.78965, -0.86805], [125.87688, -7.49892], [125.58506, -7.95311], [125.87691, -8.31789], [127.42116, -8.22471], [127.55165, -9.05052], [135.49042, -9.2276], [135.35517, -5.01442], [132.8312, -4.70282], [130.8468, -2.61103], [128.40647, -2.30349], [129.71519, -0.24692], [129.63187, 2.21409]]]]
+         }
+       }, {
+         type: "Feature",
+         properties: {
+           wikidata: "Q3845",
+           nameEn: "Western New Guinea",
+           aliases: ["ID-PP"],
+           country: "ID",
+           groups: ["035", "142", "UN"],
+           driveSide: "left",
+           callingCodes: ["62"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[135.49042, -9.2276], [141.01842, -9.35091], [141.01763, -6.90181], [140.90448, -6.85033], [140.85295, -6.72996], [140.99813, -6.3233], [141.02352, 0.08993], [129.63187, 2.21409], [129.71519, -0.24692], [128.40647, -2.30349], [130.8468, -2.61103], [132.8312, -4.70282], [135.35517, -5.01442], [135.49042, -9.2276]]]]
+         }
+       }, {
+         type: "Feature",
+         properties: {
+           wikidata: "Q5765",
+           nameEn: "Balearic Islands",
+           aliases: ["ES-IB"],
+           country: "ES",
+           groups: ["EU", "039", "150", "UN"],
+           callingCodes: ["34 971"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[-2.27707, 35.35051], [5.10072, 39.89531], [3.75438, 42.33445], [-2.27707, 35.35051]]]]
+         }
+       }, {
+         type: "Feature",
+         properties: {
+           wikidata: "Q5823",
+           nameEn: "Ceuta",
+           aliases: ["ES-CE"],
+           country: "ES",
+           groups: ["EA", "EU", "015", "002", "UN"],
+           level: "subterritory",
+           callingCodes: ["34"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[-5.38491, 35.92591], [-5.37338, 35.88417], [-5.35844, 35.87375], [-5.34379, 35.8711], [-5.21179, 35.90091], [-5.38491, 35.92591]]]]
+         }
+       }, {
+         type: "Feature",
+         properties: {
+           wikidata: "Q5831",
+           nameEn: "Melilla",
+           aliases: ["ES-ML"],
+           country: "ES",
+           groups: ["EA", "EU", "015", "002", "UN"],
+           level: "subterritory",
+           callingCodes: ["34"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[-2.91909, 35.33927], [-2.96038, 35.31609], [-2.96648, 35.30475], [-2.96978, 35.29459], [-2.97035, 35.28852], [-2.96507, 35.28801], [-2.96826, 35.28296], [-2.96516, 35.27967], [-2.95431, 35.2728], [-2.95065, 35.26576], [-2.93893, 35.26737], [-2.92272, 35.27509], [-2.91909, 35.33927]]]]
+         }
+       }, {
+         type: "Feature",
+         properties: {
+           wikidata: "Q7835",
+           nameEn: "Crimea",
+           country: "RU",
+           groups: ["151", "150", "UN"],
+           level: "subterritory",
+           callingCodes: ["7"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[33.5, 44], [36.4883, 45.0488], [36.475, 45.2411], [36.5049, 45.3136], [36.6545, 45.3417], [36.6645, 45.4514], [35.0498, 45.7683], [34.9601, 45.7563], [34.7991, 45.8101], [34.8015, 45.9005], [34.7548, 45.907], [34.6668, 45.9714], [34.6086, 45.9935], [34.5589, 45.9935], [34.5201, 45.951], [34.4873, 45.9427], [34.4415, 45.9599], [34.4122, 46.0025], [34.3391, 46.0611], [34.2511, 46.0532], [34.181, 46.068], [34.1293, 46.1049], [34.0731, 46.1177], [34.0527, 46.1084], [33.9155, 46.1594], [33.8523, 46.1986], [33.7972, 46.2048], [33.7405, 46.1855], [33.646, 46.2303], [33.6152, 46.2261], [33.6385, 46.1415], [33.6147, 46.1356], [33.5732, 46.1032], [33.5909, 46.0601], [33.5597, 46.0307], [31.5, 45.5], [33.5, 44]]]]
+         }
+       }, {
+         type: "Feature",
+         properties: {
+           wikidata: "Q12837",
+           nameEn: "Iberia",
+           level: "sharedLandform"
+         },
+         geometry: null
+       }, {
+         type: "Feature",
+         properties: {
+           wikidata: "Q14056",
+           nameEn: "Jan Mayen",
+           aliases: ["NO-22"],
+           country: "NO",
+           groups: ["SJ", "154", "150", "UN"],
+           level: "subterritory"
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[-9.18243, 72.23144], [-10.71459, 70.09565], [-5.93364, 70.76368], [-9.18243, 72.23144]]]]
+         }
+       }, {
+         type: "Feature",
+         properties: {
+           wikidata: "Q19188",
+           nameEn: "Mainland China",
+           country: "CN",
+           groups: ["030", "142", "UN"],
+           callingCodes: ["86"]
+         },
+         geometry: {
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+           coordinates: [[[[6.15771, 13.64564], [5.52957, 13.8845], [5.35437, 13.83567], [5.27797, 13.75474], [5.21026, 13.73627], [5.07396, 13.75052], [4.9368, 13.7345], [4.87425, 13.78], [4.4668, 13.68286], [4.23456, 13.47725], [4.14186, 13.47586], [4.14367, 13.17189], [4.10006, 12.98862], [3.94339, 12.74979], [3.65111, 12.52223], [3.66364, 12.25884], [3.63136, 12.11826], [3.67775, 11.97599], [3.61955, 11.91847], [3.63063, 11.83042], [3.67122, 11.80865], [3.67988, 11.75429], [3.61075, 11.69181], [3.59375, 11.70269], [3.49175, 11.29765], [3.71505, 11.13015], [3.84243, 10.59316], [3.78292, 10.40538], [3.6844, 10.46351], [3.57275, 10.27185], [3.66908, 10.18136], [3.54429, 9.87739], [3.35383, 9.83641], [3.32099, 9.78032], [3.34726, 9.70696], [3.25093, 9.61632], [3.13928, 9.47167], [3.14147, 9.28375], [3.08017, 9.10006], [2.77907, 9.06924], [2.67523, 7.87825], [2.73095, 7.7755], [2.73405, 7.5423], [2.78668, 7.5116], [2.79442, 7.43486], [2.74489, 7.42565], [2.76965, 7.13543], [2.71702, 6.95722], [2.74024, 6.92802], [2.73405, 6.78508], [2.78823, 6.76356], [2.78204, 6.70514], [2.7325, 6.64057], [2.74334, 6.57291], [2.70464, 6.50831], [2.70566, 6.38038], [2.74181, 6.13349], [5.87055, 3.78489], [8.34397, 4.30689], [8.60302, 4.87353], [8.78027, 5.1243], [8.92029, 5.58403], [8.83687, 5.68483], [8.88156, 5.78857], [8.84209, 5.82562], [9.51757, 6.43874], [9.70674, 6.51717], [9.77824, 6.79088], [9.86314, 6.77756], [10.15135, 7.03781], [10.21466, 6.88996], [10.53639, 6.93432], [10.57214, 7.16345], [10.59746, 7.14719], [10.60789, 7.06885], [10.83727, 6.9358], [10.8179, 6.83377], [10.94302, 6.69325], [11.09644, 6.68437], [11.09495, 6.51717], [11.42041, 6.53789], [11.42264, 6.5882], [11.51499, 6.60892], [11.57755, 6.74059], [11.55818, 6.86186], [11.63117, 6.9905], [11.87396, 7.09398], [11.84864, 7.26098], [11.93205, 7.47812], [12.01844, 7.52981], [11.99908, 7.67302], [12.20909, 7.97553], [12.19271, 8.10826], [12.24782, 8.17904], [12.26123, 8.43696], [12.4489, 8.52536], [12.44146, 8.6152], [12.68722, 8.65938], [12.71701, 8.7595], [12.79, 8.75361], [12.81085, 8.91992], [12.90022, 9.11411], [12.91958, 9.33905], [12.85628, 9.36698], [13.02385, 9.49334], [13.22642, 9.57266], [13.25472, 9.76795], [13.29941, 9.8296], [13.25025, 9.86042], [13.24132, 9.91031], [13.27409, 9.93232], [13.286, 9.9822], [13.25323, 10.00127], [13.25025, 10.03647], [13.34111, 10.12299], [13.43644, 10.13326], [13.5705, 10.53183], [13.54964, 10.61236], [13.73434, 10.9255], [13.70753, 10.94451], [13.7403, 11.00593], [13.78945, 11.00154], [13.97489, 11.30258], [14.17821, 11.23831], [14.6124, 11.51283], [14.64591, 11.66166], [14.55207, 11.72001], [14.61612, 11.7798], [14.6474, 12.17466], [14.4843, 12.35223], [14.22215, 12.36533], [14.17523, 12.41916], [14.20204, 12.53405], [14.08251, 13.0797], [13.6302, 13.71094], [13.33213, 13.71195], [13.19844, 13.52802], [13.05085, 13.53984], [12.87376, 13.48919], [12.6793, 13.29157], [12.58033, 13.27805], [12.47095, 13.06673], [12.19315, 13.12423], [12.16189, 13.10056], [12.04209, 13.14452], [11.88236, 13.2527], [11.4535, 13.37773], [10.66004, 13.36422], [10.46731, 13.28819], [10.19993, 13.27129], [10.00373, 13.18171], [9.65995, 12.80614], [8.97413, 12.83661], [8.64251, 12.93985], [8.60431, 13.01768], [8.49493, 13.07519], [8.41853, 13.06166], [8.25185, 13.20369], [8.07997, 13.30847], [7.81085, 13.34902], [7.39241, 13.09717], [7.22399, 13.1293], [7.12676, 13.02445], [7.0521, 13.00076], [6.94445, 12.99825], [6.69617, 13.34057], [6.43053, 13.6006], [6.27411, 13.67835], [6.15771, 13.64564]]]]
          }
-
-         return _this;
-       }
-
-       var _mainPresetIndex = presetIndex(); // singleton
-       // `presetIndex` wraps a `presetCollection`
-       // with methods for loading new data and returning defaults
-       //
-
-       function presetIndex() {
-         var dispatch$1 = dispatch('favoritePreset', 'recentsChange');
-         var MAXRECENTS = 30; // seed the preset lists with geometry fallbacks
-
-         var POINT = presetPreset('point', {
-           name: 'Point',
-           tags: {},
-           geometry: ['point', 'vertex'],
-           matchScore: 0.1
-         });
-         var LINE = presetPreset('line', {
-           name: 'Line',
-           tags: {},
-           geometry: ['line'],
-           matchScore: 0.1
-         });
-         var AREA = presetPreset('area', {
-           name: 'Area',
-           tags: {
-             area: 'yes'
-           },
-           geometry: ['area'],
-           matchScore: 0.1
-         });
-         var RELATION = presetPreset('relation', {
-           name: 'Relation',
-           tags: {},
-           geometry: ['relation'],
-           matchScore: 0.1
-         });
-
-         var _this = presetCollection([POINT, LINE, AREA, RELATION]);
-
-         var _presets = {
-           point: POINT,
-           line: LINE,
-           area: AREA,
-           relation: RELATION
-         };
-         var _defaults = {
-           point: presetCollection([POINT]),
-           vertex: presetCollection([POINT]),
-           line: presetCollection([LINE]),
-           area: presetCollection([AREA]),
-           relation: presetCollection([RELATION])
-         };
-         var _fields = {};
-         var _categories = {};
-         var _universal = [];
-         var _addablePresetIDs = null; // Set of preset IDs that the user can add
-
-         var _recents;
-
-         var _favorites; // Index of presets by (geometry, tag key).
-
-
-         var _geometryIndex = {
-           point: {},
-           vertex: {},
-           line: {},
-           area: {},
-           relation: {}
-         };
-
-         var _loadPromise;
-
-         _this.ensureLoaded = function () {
-           if (_loadPromise) return _loadPromise;
-           return _loadPromise = Promise.all([_mainFileFetcher.get('preset_categories'), _mainFileFetcher.get('preset_defaults'), _mainFileFetcher.get('preset_presets'), _mainFileFetcher.get('preset_fields')]).then(function (vals) {
-             _this.merge({
-               categories: vals[0],
-               defaults: vals[1],
-               presets: vals[2],
-               fields: vals[3]
-             });
-
-             osmSetAreaKeys(_this.areaKeys());
-             osmSetPointTags(_this.pointTags());
-             osmSetVertexTags(_this.vertexTags());
-           });
-         };
-
-         _this.merge = function (d) {
-           // Merge Fields
-           if (d.fields) {
-             Object.keys(d.fields).forEach(function (fieldID) {
-               var f = d.fields[fieldID];
-
-               if (f) {
-                 // add or replace
-                 _fields[fieldID] = presetField(fieldID, f);
-               } else {
-                 // remove
-                 delete _fields[fieldID];
-               }
-             });
-           } // Merge Presets
-
-
-           if (d.presets) {
-             Object.keys(d.presets).forEach(function (presetID) {
-               var p = d.presets[presetID];
-
-               if (p) {
-                 // add or replace
-                 var isAddable = !_addablePresetIDs || _addablePresetIDs.has(presetID);
-
-                 _presets[presetID] = presetPreset(presetID, p, isAddable, _fields, _presets);
-               } else {
-                 // remove (but not if it's a fallback)
-                 var existing = _presets[presetID];
-
-                 if (existing && !existing.isFallback()) {
-                   delete _presets[presetID];
-                 }
-               }
-             });
-           } // Need to rebuild _this.collection before loading categories
-
-
-           _this.collection = Object.values(_presets).concat(Object.values(_categories)); // Merge Categories
-
-           if (d.categories) {
-             Object.keys(d.categories).forEach(function (categoryID) {
-               var c = d.categories[categoryID];
-
-               if (c) {
-                 // add or replace
-                 _categories[categoryID] = presetCategory(categoryID, c, _this);
-               } else {
-                 // remove
-                 delete _categories[categoryID];
-               }
-             });
-           } // Rebuild _this.collection after loading categories
-
-
-           _this.collection = Object.values(_presets).concat(Object.values(_categories)); // Merge Defaults
-
-           if (d.defaults) {
-             Object.keys(d.defaults).forEach(function (geometry) {
-               var def = d.defaults[geometry];
-
-               if (Array.isArray(def)) {
-                 // add or replace
-                 _defaults[geometry] = presetCollection(def.map(function (id) {
-                   return _presets[id] || _categories[id];
-                 }).filter(Boolean));
-               } else {
-                 // remove
-                 delete _defaults[geometry];
-               }
-             });
-           } // Rebuild universal fields array
-
-
-           _universal = Object.values(_fields).filter(function (field) {
-             return field.universal;
-           }); // Reset all the preset fields - they'll need to be resolved again
-
-           Object.values(_presets).forEach(function (preset) {
-             return preset.resetFields();
-           }); // Rebuild geometry index
-
-           _geometryIndex = {
-             point: {},
-             vertex: {},
-             line: {},
-             area: {},
-             relation: {}
-           };
-
-           _this.collection.forEach(function (preset) {
-             (preset.geometry || []).forEach(function (geometry) {
-               var g = _geometryIndex[geometry];
-
-               for (var key in preset.tags) {
-                 (g[key] = g[key] || []).push(preset);
-               }
-             });
-           });
-
-           return _this;
-         };
-
-         _this.match = function (entity, resolver) {
-           return resolver["transient"](entity, 'presetMatch', function () {
-             var geometry = entity.geometry(resolver); // Treat entities on addr:interpolation lines as points, not vertices - #3241
-
-             if (geometry === 'vertex' && entity.isOnAddressLine(resolver)) {
-               geometry = 'point';
-             }
-
-             return _this.matchTags(entity.tags, geometry);
-           });
-         };
-
-         _this.matchTags = function (tags, geometry) {
-           var geometryMatches = _geometryIndex[geometry];
-           var address;
-           var best = -1;
-           var match;
-
-           for (var k in tags) {
-             // If any part of an address is present, allow fallback to "Address" preset - #4353
-             if (/^addr:/.test(k) && geometryMatches['addr:*']) {
-               address = geometryMatches['addr:*'][0];
-             }
-
-             var keyMatches = geometryMatches[k];
-             if (!keyMatches) continue;
-
-             for (var i = 0; i < keyMatches.length; i++) {
-               var score = keyMatches[i].matchScore(tags);
-
-               if (score > best) {
-                 best = score;
-                 match = keyMatches[i];
-               }
-             }
-           }
-
-           if (address && (!match || match.isFallback())) {
-             match = address;
-           }
-
-           return match || _this.fallback(geometry);
-         };
-
-         _this.allowsVertex = function (entity, resolver) {
-           if (entity.type !== 'node') return false;
-           if (Object.keys(entity.tags).length === 0) return true;
-           return resolver["transient"](entity, 'vertexMatch', function () {
-             // address lines allow vertices to act as standalone points
-             if (entity.isOnAddressLine(resolver)) return true;
-             var geometries = osmNodeGeometriesForTags(entity.tags);
-             if (geometries.vertex) return true;
-             if (geometries.point) return false; // allow vertices for unspecified points
-
-             return true;
-           });
-         }; // Because of the open nature of tagging, iD will never have a complete
-         // list of tags used in OSM, so we want it to have logic like "assume
-         // that a closed way with an amenity tag is an area, unless the amenity
-         // is one of these specific types". This function computes a structure
-         // that allows testing of such conditions, based on the presets designated
-         // as as supporting (or not supporting) the area geometry.
-         //
-         // The returned object L is a keeplist/discardlist of tags. A closed way
-         // with a tag (k, v) is considered to be an area if `k in L && !(v in L[k])`
-         // (see `Way#isArea()`). In other words, the keys of L form the keeplist,
-         // and the subkeys form the discardlist.
-
-
-         _this.areaKeys = function () {
-           // The ignore list is for keys that imply lines. (We always add `area=yes` for exceptions)
-           var ignore = ['barrier', 'highway', 'footway', 'railway', 'junction', 'type'];
-           var areaKeys = {}; // ignore name-suggestion-index and deprecated presets
-
-           var presets = _this.collection.filter(function (p) {
-             return !p.suggestion && !p.replacement;
-           }); // keeplist
-
-
-           presets.forEach(function (p) {
-             var keys = p.tags && Object.keys(p.tags);
-             var key = keys && keys.length && keys[0]; // pick the first tag
-
-             if (!key) return;
-             if (ignore.indexOf(key) !== -1) return;
-
-             if (p.geometry.indexOf('area') !== -1) {
-               // probably an area..
-               areaKeys[key] = areaKeys[key] || {};
-             }
-           }); // discardlist
-
-           presets.forEach(function (p) {
-             var key;
-
-             for (key in p.addTags) {
-               // examine all addTags to get a better sense of what can be tagged on lines - #6800
-               var value = p.addTags[key];
-
-               if (key in areaKeys && // probably an area...
-               p.geometry.indexOf('line') !== -1 && // but sometimes a line
-               value !== '*') {
-                 areaKeys[key][value] = true;
-               }
-             }
-           });
-           return areaKeys;
-         };
-
-         _this.pointTags = function () {
-           return _this.collection.reduce(function (pointTags, d) {
-             // ignore name-suggestion-index, deprecated, and generic presets
-             if (d.suggestion || d.replacement || d.searchable === false) return pointTags; // only care about the primary tag
-
-             var keys = d.tags && Object.keys(d.tags);
-             var key = keys && keys.length && keys[0]; // pick the first tag
-
-             if (!key) return pointTags; // if this can be a point
-
-             if (d.geometry.indexOf('point') !== -1) {
-               pointTags[key] = pointTags[key] || {};
-               pointTags[key][d.tags[key]] = true;
-             }
-
-             return pointTags;
-           }, {});
-         };
-
-         _this.vertexTags = function () {
-           return _this.collection.reduce(function (vertexTags, d) {
-             // ignore name-suggestion-index, deprecated, and generic presets
-             if (d.suggestion || d.replacement || d.searchable === false) return vertexTags; // only care about the primary tag
-
-             var 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
-
-             if (d.geometry.indexOf('vertex') !== -1) {
-               vertexTags[key] = vertexTags[key] || {};
-               vertexTags[key][d.tags[key]] = true;
-             }
-
-             return vertexTags;
-           }, {});
-         };
-
-         _this.field = function (id) {
-           return _fields[id];
-         };
-
-         _this.universal = function () {
-           return _universal;
-         };
-
-         _this.defaults = function (geometry, n, startWithRecents) {
-           var recents = [];
-
-           if (startWithRecents) {
-             recents = _this.recent().matchGeometry(geometry).collection.slice(0, 4);
-           }
-
-           var defaults;
-
-           if (_addablePresetIDs) {
-             defaults = Array.from(_addablePresetIDs).map(function (id) {
-               var preset = _this.item(id);
-
-               if (preset && preset.matchGeometry(geometry)) return preset;
-               return null;
-             }).filter(Boolean);
-           } else {
-             defaults = _defaults[geometry].collection.concat(_this.fallback(geometry));
-           }
-
-           return presetCollection(utilArrayUniq(recents.concat(defaults)).slice(0, n - 1));
-         }; // pass a Set of addable preset ids
-
-
-         _this.addablePresetIDs = function (val) {
-           if (!arguments.length) return _addablePresetIDs; // accept and convert arrays
-
-           if (Array.isArray(val)) val = new Set(val);
-           _addablePresetIDs = val;
-
-           if (_addablePresetIDs) {
-             // reset all presets
-             _this.collection.forEach(function (p) {
-               // categories aren't addable
-               if (p.addable) p.addable(_addablePresetIDs.has(p.id));
-             });
-           } else {
-             _this.collection.forEach(function (p) {
-               if (p.addable) p.addable(true);
-             });
-           }
-
-           return _this;
-         };
-
-         _this.recent = function () {
-           return presetCollection(utilArrayUniq(_this.getRecents().map(function (d) {
-             return d.preset;
-           })));
-         };
-
-         function RibbonItem(preset, source) {
-           var item = {};
-           item.preset = preset;
-           item.source = source;
-
-           item.isFavorite = function () {
-             return item.source === 'favorite';
-           };
-
-           item.isRecent = function () {
-             return item.source === 'recent';
-           };
-
-           item.matches = function (preset) {
-             return item.preset.id === preset.id;
-           };
-
-           item.minified = function () {
-             return {
-               pID: item.preset.id
-             };
-           };
-
-           return item;
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "NI",
+           iso1A3: "NIC",
+           iso1N3: "558",
+           wikidata: "Q811",
+           nameEn: "Nicaragua",
+           groups: ["013", "003", "419", "019", "UN"],
+           callingCodes: ["505"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[-83.13724, 15.00002], [-83.49268, 15.01158], [-83.62101, 14.89448], [-83.89551, 14.76697], [-84.10584, 14.76353], [-84.48373, 14.63249], [-84.70119, 14.68078], [-84.82596, 14.82212], [-84.90082, 14.80489], [-85.1575, 14.53934], [-85.18602, 14.24929], [-85.32149, 14.2562], [-85.45762, 14.11304], [-85.73964, 13.9698], [-85.75477, 13.8499], [-86.03458, 13.99181], [-86.00685, 14.08474], [-86.14801, 14.04317], [-86.35219, 13.77157], [-86.76812, 13.79605], [-86.71267, 13.30348], [-86.87066, 13.30641], [-86.93383, 13.18677], [-86.93197, 13.05313], [-87.03785, 12.98682], [-87.06306, 13.00892], [-87.37107, 12.98646], [-87.55124, 13.12523], [-87.7346, 13.13228], [-88.11443, 12.63306], [-86.14524, 11.09059], [-85.71223, 11.06868], [-85.60529, 11.22607], [-84.92439, 10.9497], [-84.68197, 11.07568], [-83.90838, 10.71161], [-83.66597, 10.79916], [-83.68276, 11.01562], [-82.56142, 11.91792], [-82.06974, 14.49418], [-83.04763, 15.03256], [-83.13724, 15.00002]]]]
          }
-
-         function ribbonItemForMinified(d, source) {
-           if (d && d.pID) {
-             var preset = _this.item(d.pID);
-
-             if (!preset) return null;
-             return RibbonItem(preset, source);
-           }
-
-           return null;
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "NL",
+           iso1A3: "NLD",
+           iso1N3: "528",
+           wikidata: "Q29999",
+           nameEn: "Kingdom of the Netherlands"
+         },
+         geometry: null
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "NO",
+           iso1A3: "NOR",
+           iso1N3: "578",
+           wikidata: "Q20",
+           nameEn: "Norway"
+         },
+         geometry: null
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "NP",
+           iso1A3: "NPL",
+           iso1N3: "524",
+           wikidata: "Q837",
+           nameEn: "Nepal",
+           groups: ["034", "142", "UN"],
+           driveSide: "left",
+           callingCodes: ["977"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[88.13378, 27.88015], [87.82681, 27.95248], [87.72718, 27.80938], [87.56996, 27.84517], [87.11696, 27.84104], [87.03757, 27.94835], [86.75582, 28.04182], [86.74181, 28.10638], [86.56265, 28.09569], [86.51609, 27.96623], [86.42736, 27.91122], [86.22966, 27.9786], [86.18607, 28.17364], [86.088, 28.09264], [86.08333, 28.02121], [86.12069, 27.93047], [86.06309, 27.90021], [85.94946, 27.9401], [85.97813, 27.99023], [85.90743, 28.05144], [85.84672, 28.18187], [85.74864, 28.23126], [85.71907, 28.38064], [85.69105, 28.38475], [85.60854, 28.25045], [85.59765, 28.30529], [85.4233, 28.32996], [85.38127, 28.28336], [85.10729, 28.34092], [85.18668, 28.54076], [85.19135, 28.62825], [85.06059, 28.68562], [84.85511, 28.58041], [84.62317, 28.73887], [84.47528, 28.74023], [84.2231, 28.89571], [84.24801, 29.02783], [84.18107, 29.23451], [83.97559, 29.33091], [83.82303, 29.30513], [83.63156, 29.16249], [83.44787, 29.30513], [83.28131, 29.56813], [83.07116, 29.61957], [82.73024, 29.81695], [82.5341, 29.9735], [82.38622, 30.02608], [82.16984, 30.0692], [82.19475, 30.16884], [82.10757, 30.23745], [82.10135, 30.35439], [81.99082, 30.33423], [81.62033, 30.44703], [81.5459, 30.37688], [81.41018, 30.42153], [81.39928, 30.21862], [81.33355, 30.15303], [81.2623, 30.14596], [81.29032, 30.08806], [81.24362, 30.0126], [81.12842, 30.01395], [81.03953, 30.20059], [80.92547, 30.17193], [80.91143, 30.22173], [80.86673, 30.17321], [80.8778, 30.13384], [80.67076, 29.95732], [80.60226, 29.95732], [80.57179, 29.91422], [80.56247, 29.86661], [80.48997, 29.79566], [80.43458, 29.80466], [80.41554, 29.79451], [80.36803, 29.73865], [80.38428, 29.68513], [80.41858, 29.63581], [80.37939, 29.57098], [80.24322, 29.44299], [80.31428, 29.30784], [80.28626, 29.20327], [80.24112, 29.21414], [80.26602, 29.13938], [80.23178, 29.11626], [80.18085, 29.13649], [80.05743, 28.91479], [80.06957, 28.82763], [80.12125, 28.82346], [80.37188, 28.63371], [80.44504, 28.63098], [80.52443, 28.54897], [80.50575, 28.6706], [80.55142, 28.69182], [81.03471, 28.40054], [81.19847, 28.36284], [81.32923, 28.13521], [81.38683, 28.17638], [81.48179, 28.12148], [81.47867, 28.08303], [81.91223, 27.84995], [81.97214, 27.93322], [82.06554, 27.92222], [82.46405, 27.6716], [82.70378, 27.72122], [82.74119, 27.49838], [82.93261, 27.50328], [82.94938, 27.46036], [83.19413, 27.45632], [83.27197, 27.38309], [83.2673, 27.36235], [83.29999, 27.32778], [83.35136, 27.33885], [83.38872, 27.39276], [83.39495, 27.4798], [83.61288, 27.47013], [83.85595, 27.35797], [83.86182, 27.4241], [83.93306, 27.44939], [84.02229, 27.43836], [84.10791, 27.52399], [84.21376, 27.45218], [84.25735, 27.44941], [84.29315, 27.39], [84.62161, 27.33885], [84.69166, 27.21294], [84.64496, 27.04669], [84.793, 26.9968], [84.82913, 27.01989], [84.85754, 26.98984], [84.96687, 26.95599], [84.97186, 26.9149], [85.00536, 26.89523], [85.05592, 26.88991], [85.02635, 26.85381], [85.15883, 26.86966], [85.19291, 26.86909], [85.18046, 26.80519], [85.21159, 26.75933], [85.34302, 26.74954], [85.47752, 26.79292], [85.56471, 26.84133], [85.5757, 26.85955], [85.59461, 26.85161], [85.61621, 26.86721], [85.66239, 26.84822], [85.73483, 26.79613], [85.72315, 26.67471], [85.76907, 26.63076], [85.83126, 26.61134], [85.85126, 26.60866], [85.8492, 26.56667], [86.02729, 26.66756], [86.13596, 26.60651], [86.22513, 26.58863], [86.26235, 26.61886], [86.31564, 26.61925], [86.49726, 26.54218], [86.54258, 26.53819], [86.57073, 26.49825], [86.61313, 26.48658], [86.62686, 26.46891], [86.69124, 26.45169], [86.74025, 26.42386], [86.76797, 26.45892], [86.82898, 26.43919], [86.94543, 26.52076], [86.95912, 26.52076], [87.01559, 26.53228], [87.04691, 26.58685], [87.0707, 26.58571], [87.09147, 26.45039], [87.14751, 26.40542], [87.18863, 26.40558], [87.24682, 26.4143], [87.26587, 26.40592], [87.26568, 26.37294], [87.34568, 26.34787], [87.37314, 26.40815], [87.46566, 26.44058], [87.51571, 26.43106], [87.55274, 26.40596], [87.59175, 26.38342], [87.66803, 26.40294], [87.67893, 26.43501], [87.76004, 26.40711], [87.7918, 26.46737], [87.84193, 26.43663], [87.89085, 26.48565], [87.90115, 26.44923], [88.00895, 26.36029], [88.09414, 26.43732], [88.09963, 26.54195], [88.16452, 26.64111], [88.1659, 26.68177], [88.19107, 26.75516], [88.12302, 26.95324], [88.13422, 26.98705], [88.11719, 26.98758], [87.9887, 27.11045], [88.01587, 27.21388], [88.01646, 27.21612], [88.07277, 27.43007], [88.04008, 27.49223], [88.19107, 27.79285], [88.1973, 27.85067], [88.13378, 27.88015]]]]
          }
-
-         _this.getGenericRibbonItems = function () {
-           return ['point', 'line', 'area'].map(function (id) {
-             return RibbonItem(_this.item(id), 'generic');
-           });
-         };
-
-         _this.getAddable = function () {
-           if (!_addablePresetIDs) return [];
-           return _addablePresetIDs.map(function (id) {
-             var preset = _this.item(id);
-
-             if (preset) return RibbonItem(preset, 'addable');
-             return null;
-           }).filter(Boolean);
-         };
-
-         function setRecents(items) {
-           _recents = items;
-           var minifiedItems = items.map(function (d) {
-             return d.minified();
-           });
-           corePreferences('preset_recents', JSON.stringify(minifiedItems));
-           dispatch$1.call('recentsChange');
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "NR",
+           iso1A3: "NRU",
+           iso1N3: "520",
+           wikidata: "Q697",
+           nameEn: "Nauru",
+           groups: ["057", "009", "UN"],
+           driveSide: "left",
+           callingCodes: ["674"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[166.95155, 0.14829], [166.21778, -0.7977], [167.60042, -0.88259], [166.95155, 0.14829]]]]
+         }
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "NU",
+           iso1A3: "NIU",
+           iso1N3: "570",
+           wikidata: "Q34020",
+           nameEn: "Niue",
+           country: "NZ",
+           groups: ["061", "009", "UN"],
+           driveSide: "left",
+           callingCodes: ["683"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[-170.83899, -18.53439], [-170.82274, -20.44429], [-168.63096, -18.60489], [-170.83899, -18.53439]]]]
+         }
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "NZ",
+           iso1A3: "NZL",
+           iso1N3: "554",
+           wikidata: "Q664",
+           nameEn: "New Zealand"
+         },
+         geometry: null
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "OM",
+           iso1A3: "OMN",
+           iso1N3: "512",
+           wikidata: "Q842",
+           nameEn: "Oman",
+           groups: ["145", "142", "UN"],
+           callingCodes: ["968"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[56.82555, 25.7713], [56.79239, 26.41236], [56.68954, 26.76645], [56.2644, 26.58649], [55.81777, 26.18798], [56.08666, 26.05038], [56.15498, 26.06828], [56.19334, 25.9795], [56.13963, 25.82765], [56.17416, 25.77239], [56.13579, 25.73524], [56.14826, 25.66351], [56.18363, 25.65508], [56.20473, 25.61119], [56.25365, 25.60211], [56.26636, 25.60643], [56.25341, 25.61443], [56.26534, 25.62825], [56.82555, 25.7713]]], [[[56.26062, 25.33108], [56.23362, 25.31253], [56.25008, 25.28843], [56.24465, 25.27505], [56.20838, 25.25668], [56.20872, 25.24104], [56.24341, 25.22867], [56.27628, 25.23404], [56.34438, 25.26653], [56.35172, 25.30681], [56.3111, 25.30107], [56.3005, 25.31815], [56.26062, 25.33108]], [[56.28423, 25.26344], [56.27086, 25.26128], [56.2716, 25.27916], [56.28102, 25.28486], [56.29379, 25.2754], [56.28423, 25.26344]]], [[[61.45114, 22.55394], [56.86325, 25.03856], [56.3227, 24.97284], [56.34873, 24.93205], [56.30269, 24.88334], [56.20568, 24.85063], [56.20062, 24.78565], [56.13684, 24.73699], [56.06128, 24.74457], [56.03535, 24.81161], [55.97836, 24.87673], [55.97467, 24.89639], [56.05106, 24.87461], [56.05715, 24.95727], [55.96316, 25.00857], [55.90849, 24.96771], [55.85094, 24.96858], [55.81116, 24.9116], [55.81348, 24.80102], [55.83408, 24.77858], [55.83271, 24.68567], [55.76461, 24.5287], [55.83271, 24.41521], [55.83395, 24.32776], [55.80747, 24.31069], [55.79145, 24.27914], [55.76781, 24.26209], [55.75939, 24.26114], [55.75382, 24.2466], [55.75257, 24.23466], [55.76558, 24.23227], [55.77658, 24.23476], [55.83367, 24.20193], [55.95472, 24.2172], [56.01799, 24.07426], [55.8308, 24.01633], [55.73301, 24.05994], [55.48677, 23.94946], [55.57358, 23.669], [55.22634, 23.10378], [55.2137, 22.71065], [55.66469, 21.99658], [54.99756, 20.00083], [52.00311, 19.00083], [52.78009, 17.35124], [52.74267, 17.29519], [52.81185, 17.28568], [57.49095, 8.14549], [61.45114, 22.55394]]]]
+         }
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "PA",
+           iso1A3: "PAN",
+           iso1N3: "591",
+           wikidata: "Q804",
+           nameEn: "Panama",
+           groups: ["013", "003", "419", "019", "UN"],
+           callingCodes: ["507"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[-77.32389, 8.81247], [-77.58292, 9.22278], [-78.79327, 9.93766], [-82.51044, 9.65379], [-82.56507, 9.57279], [-82.61345, 9.49881], [-82.66667, 9.49746], [-82.77206, 9.59573], [-82.87919, 9.62645], [-82.84871, 9.4973], [-82.93516, 9.46741], [-82.93516, 9.07687], [-82.72126, 8.97125], [-82.88253, 8.83331], [-82.91377, 8.774], [-82.92068, 8.74832], [-82.8794, 8.6981], [-82.82739, 8.60153], [-82.83975, 8.54755], [-82.83322, 8.52464], [-82.8382, 8.48117], [-82.8679, 8.44042], [-82.93056, 8.43465], [-83.05209, 8.33394], [-82.9388, 8.26634], [-82.88641, 8.10219], [-82.89137, 8.05755], [-82.89978, 8.04083], [-82.94503, 7.93865], [-82.13751, 6.97312], [-78.06168, 7.07793], [-77.89178, 7.22681], [-77.81426, 7.48319], [-77.72157, 7.47612], [-77.72514, 7.72348], [-77.57185, 7.51147], [-77.17257, 7.97422], [-77.45064, 8.49991], [-77.32389, 8.81247]]]]
+         }
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "PE",
+           iso1A3: "PER",
+           iso1N3: "604",
+           wikidata: "Q419",
+           nameEn: "Peru",
+           groups: ["005", "419", "019", "UN"],
+           callingCodes: ["51"]
+         },
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+           wikidata: "Q842829",
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+           country: "NO"
+         },
+         geometry: null
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+           iso1A3: "SVK",
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+         }
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "SL",
+           iso1A3: "SLE",
+           iso1N3: "694",
+           wikidata: "Q1044",
+           nameEn: "Sierra Leone",
+           groups: ["011", "202", "002", "UN"],
+           callingCodes: ["232"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[-10.27575, 8.48711], [-10.37257, 8.48941], [-10.54891, 8.31174], [-10.63934, 8.35326], [-10.70565, 8.29235], [-10.61422, 8.5314], [-10.47707, 8.67669], [-10.56197, 8.81225], [-10.5783, 9.06386], [-10.74484, 9.07998], [-10.6534, 9.29919], [-11.2118, 10.00098], [-11.89624, 9.99763], [-11.91023, 9.93927], [-12.12634, 9.87203], [-12.24262, 9.92386], [-12.47254, 9.86834], [-12.76788, 9.3133], [-12.94095, 9.26335], [-13.08953, 9.0409], [-13.18586, 9.0925], [-13.29911, 9.04245], [-14.36218, 8.64107], [-12.15048, 6.15992], [-11.50429, 6.92704], [-11.4027, 6.97746], [-11.29417, 7.21576], [-10.60422, 7.7739], [-10.60492, 8.04072], [-10.57523, 8.04829], [-10.51554, 8.1393], [-10.45023, 8.15627], [-10.35227, 8.15223], [-10.29839, 8.21283], [-10.31635, 8.28554], [-10.30084, 8.30008], [-10.27575, 8.48711]]]]
+         }
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "SM",
+           iso1A3: "SMR",
+           iso1N3: "674",
+           wikidata: "Q238",
+           nameEn: "San Marino",
+           groups: ["039", "150", "UN"],
+           callingCodes: ["378"]
+         },
+         geometry: {
+           type: "MultiPolygon",
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          }
-
-         _this.getRecents = function () {
-           if (!_recents) {
-             // fetch from local storage
-             _recents = (JSON.parse(corePreferences('preset_recents')) || []).reduce(function (acc, d) {
-               var item = ribbonItemForMinified(d, 'recent');
-               if (item && item.preset.addable()) acc.push(item);
-               return acc;
-             }, []);
-           }
-
-           return _recents;
-         };
-
-         _this.addRecent = function (preset, besidePreset, after) {
-           var recents = _this.getRecents();
-
-           var beforeItem = _this.recentMatching(besidePreset);
-
-           var toIndex = recents.indexOf(beforeItem);
-           if (after) toIndex += 1;
-           var newItem = RibbonItem(preset, 'recent');
-           recents.splice(toIndex, 0, newItem);
-           setRecents(recents);
-         };
-
-         _this.removeRecent = function (preset) {
-           var item = _this.recentMatching(preset);
-
-           if (item) {
-             var items = _this.getRecents();
-
-             items.splice(items.indexOf(item), 1);
-             setRecents(items);
-           }
-         };
-
-         _this.recentMatching = function (preset) {
-           var items = _this.getRecents();
-
-           for (var i in items) {
-             if (items[i].matches(preset)) {
-               return items[i];
-             }
-           }
-
-           return null;
-         };
-
-         _this.moveItem = function (items, fromIndex, toIndex) {
-           if (fromIndex === toIndex || fromIndex < 0 || toIndex < 0 || fromIndex >= items.length || toIndex >= items.length) return null;
-           items.splice(toIndex, 0, items.splice(fromIndex, 1)[0]);
-           return items;
-         };
-
-         _this.moveRecent = function (item, beforeItem) {
-           var recents = _this.getRecents();
-
-           var fromIndex = recents.indexOf(item);
-           var toIndex = recents.indexOf(beforeItem);
-
-           var items = _this.moveItem(recents, fromIndex, toIndex);
-
-           if (items) setRecents(items);
-         };
-
-         _this.setMostRecent = function (preset) {
-           if (preset.searchable === false) return;
-
-           var items = _this.getRecents();
-
-           var item = _this.recentMatching(preset);
-
-           if (item) {
-             items.splice(items.indexOf(item), 1);
-           } else {
-             item = RibbonItem(preset, 'recent');
-           } // remove the last recent (first in, first out)
-
-
-           while (items.length >= MAXRECENTS) {
-             items.pop();
-           } // prepend array
-
-
-           items.unshift(item);
-           setRecents(items);
-         };
-
-         function setFavorites(items) {
-           _favorites = items;
-           var minifiedItems = items.map(function (d) {
-             return d.minified();
-           });
-           corePreferences('preset_favorites', JSON.stringify(minifiedItems)); // call update
-
-           dispatch$1.call('favoritePreset');
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "SN",
+           iso1A3: "SEN",
+           iso1N3: "686",
+           wikidata: "Q1041",
+           nameEn: "Senegal",
+           groups: ["011", "202", "002", "UN"],
+           callingCodes: ["221"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[-14.32144, 16.61495], [-15.00557, 16.64997], [-15.6509, 16.50315], [-16.27016, 16.51565], [-16.4429, 16.20605], [-16.44814, 16.09753], [-16.48967, 16.0496], [-16.50854, 16.09032], [-17.15288, 16.07139], [-18.35085, 14.63444], [-17.43598, 13.59273], [-15.47902, 13.58758], [-15.36504, 13.79313], [-14.93719, 13.80173], [-14.34721, 13.46578], [-13.8955, 13.59126], [-13.79409, 13.34472], [-14.36795, 13.23033], [-15.14917, 13.57989], [-15.26908, 13.37768], [-15.80478, 13.34832], [-15.80355, 13.16729], [-16.69343, 13.16791], [-16.74676, 13.06025], [-17.43966, 13.04579], [-17.4623, 11.92379], [-16.70562, 12.34803], [-16.38191, 12.36449], [-16.20591, 12.46157], [-15.67302, 12.42974], [-15.17582, 12.6847], [-13.70523, 12.68013], [-13.05296, 12.64003], [-13.06603, 12.49342], [-12.87336, 12.51892], [-12.35415, 12.32758], [-11.91331, 12.42008], [-11.46267, 12.44559], [-11.37536, 12.40788], [-11.39935, 12.97808], [-11.63025, 13.39174], [-11.83345, 13.33333], [-12.06897, 13.71049], [-11.93043, 13.84505], [-12.23936, 14.76324], [-13.11029, 15.52116], [-13.43135, 16.09022], [-13.80075, 16.13961], [-14.32144, 16.61495]]]]
          }
-
-         _this.addFavorite = function (preset, besidePreset, after) {
-           var favorites = _this.getFavorites();
-
-           var beforeItem = _this.favoriteMatching(besidePreset);
-
-           var toIndex = favorites.indexOf(beforeItem);
-           if (after) toIndex += 1;
-           var newItem = RibbonItem(preset, 'favorite');
-           favorites.splice(toIndex, 0, newItem);
-           setFavorites(favorites);
-         };
-
-         _this.toggleFavorite = function (preset) {
-           var favs = _this.getFavorites();
-
-           var favorite = _this.favoriteMatching(preset);
-
-           if (favorite) {
-             favs.splice(favs.indexOf(favorite), 1);
-           } else {
-             // only allow 10 favorites
-             if (favs.length === 10) {
-               // remove the last favorite (last in, first out)
-               favs.pop();
-             } // append array
-
-
-             favs.push(RibbonItem(preset, 'favorite'));
-           }
-
-           setFavorites(favs);
-         };
-
-         _this.removeFavorite = function (preset) {
-           var item = _this.favoriteMatching(preset);
-
-           if (item) {
-             var items = _this.getFavorites();
-
-             items.splice(items.indexOf(item), 1);
-             setFavorites(items);
-           }
-         };
-
-         _this.getFavorites = function () {
-           if (!_favorites) {
-             // fetch from local storage
-             var rawFavorites = JSON.parse(corePreferences('preset_favorites'));
-
-             if (!rawFavorites) {
-               rawFavorites = [];
-               corePreferences('preset_favorites', JSON.stringify(rawFavorites));
-             }
-
-             _favorites = rawFavorites.reduce(function (output, d) {
-               var item = ribbonItemForMinified(d, 'favorite');
-               if (item && item.preset.addable()) output.push(item);
-               return output;
-             }, []);
-           }
-
-           return _favorites;
-         };
-
-         _this.favoriteMatching = function (preset) {
-           var favs = _this.getFavorites();
-
-           for (var index in favs) {
-             if (favs[index].matches(preset)) {
-               return favs[index];
-             }
-           }
-
-           return null;
-         };
-
-         return utilRebind(_this, dispatch$1, 'on');
-       }
-
-       function utilTagText(entity) {
-         var obj = entity && entity.tags || {};
-         return Object.keys(obj).map(function (k) {
-           return k + '=' + obj[k];
-         }).join(', ');
-       }
-       function utilTotalExtent(array, graph) {
-         var extent = geoExtent();
-         var val, entity;
-
-         for (var i = 0; i < array.length; i++) {
-           val = array[i];
-           entity = typeof val === 'string' ? graph.hasEntity(val) : val;
-
-           if (entity) {
-             extent._extend(entity.extent(graph));
-           }
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "SO",
+           iso1A3: "SOM",
+           iso1N3: "706",
+           wikidata: "Q1045",
+           nameEn: "Somalia",
+           groups: ["014", "202", "002", "UN"],
+           callingCodes: ["252"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[51.12877, 12.56479], [43.90659, 12.3823], [42.95776, 10.98533], [42.69452, 10.62672], [42.87643, 10.18441], [43.0937, 9.90579], [43.23518, 9.84605], [43.32613, 9.59205], [44.19222, 8.93028], [46.99339, 7.9989], [47.92477, 8.00111], [47.97917, 8.00124], [44.98104, 4.91821], [44.02436, 4.9451], [43.40263, 4.79289], [43.04177, 4.57923], [42.97746, 4.44032], [42.84526, 4.28357], [42.55853, 4.20518], [42.07619, 4.17667], [41.89488, 3.97375], [41.31368, 3.14314], [40.98767, 2.82959], [41.00099, -0.83068], [41.56, -1.59812], [41.56362, -1.66375], [41.75542, -1.85308], [57.49095, 8.14549], [51.12877, 12.56479]]]]
          }
-
-         return extent;
-       }
-       function utilTagDiff(oldTags, newTags) {
-         var tagDiff = [];
-         var keys = utilArrayUnion(Object.keys(oldTags), Object.keys(newTags)).sort();
-         keys.forEach(function (k) {
-           var oldVal = oldTags[k];
-           var newVal = newTags[k];
-
-           if ((oldVal || oldVal === '') && (newVal === undefined || newVal !== oldVal)) {
-             tagDiff.push({
-               type: '-',
-               key: k,
-               oldVal: oldVal,
-               newVal: newVal,
-               display: '- ' + k + '=' + oldVal
-             });
-           }
-
-           if ((newVal || newVal === '') && (oldVal === undefined || newVal !== oldVal)) {
-             tagDiff.push({
-               type: '+',
-               key: k,
-               oldVal: oldVal,
-               newVal: newVal,
-               display: '+ ' + k + '=' + newVal
-             });
-           }
-         });
-         return tagDiff;
-       }
-       function utilEntitySelector(ids) {
-         return ids.length ? '.' + ids.join(',.') : 'nothing';
-       } // returns an selector to select entity ids for:
-       //  - entityIDs passed in
-       //  - shallow descendant entityIDs for any of those entities that are relations
-
-       function utilEntityOrMemberSelector(ids, graph) {
-         var seen = new Set(ids);
-         ids.forEach(collectShallowDescendants);
-         return utilEntitySelector(Array.from(seen));
-
-         function collectShallowDescendants(id) {
-           var entity = graph.hasEntity(id);
-           if (!entity || entity.type !== 'relation') return;
-           entity.members.map(function (member) {
-             return member.id;
-           }).forEach(function (id) {
-             seen.add(id);
-           });
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "SR",
+           iso1A3: "SUR",
+           iso1N3: "740",
+           wikidata: "Q730",
+           nameEn: "Suriname",
+           groups: ["005", "419", "019", "UN"],
+           driveSide: "left",
+           callingCodes: ["597"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[-54.26916, 5.26909], [-54.01877, 5.52789], [-54.01074, 5.68785], [-53.7094, 6.2264], [-56.84822, 6.73257], [-57.31629, 5.33714], [-57.22536, 5.15605], [-57.37442, 5.0208], [-57.8699, 4.89394], [-58.0307, 3.95513], [-57.35891, 3.32121], [-56.70519, 2.02964], [-56.55439, 2.02003], [-56.47045, 1.95135], [-55.99278, 1.83137], [-55.89863, 1.89861], [-55.92159, 2.05236], [-56.13054, 2.27723], [-55.96292, 2.53188], [-55.71493, 2.40342], [-55.01919, 2.564], [-54.6084, 2.32856], [-54.42864, 2.42442], [-54.28534, 2.67798], [-53.9849, 3.58697], [-53.98914, 3.627], [-54.05128, 3.63557], [-54.19367, 3.84387], [-54.38444, 4.13222], [-54.4717, 4.91964], [-54.26916, 5.26909]]]]
          }
-       } // returns an selector to select entity ids for:
-       //  - entityIDs passed in
-       //  - deep descendant entityIDs for any of those entities that are relations
-
-       function utilEntityOrDeepMemberSelector(ids, graph) {
-         return utilEntitySelector(utilEntityAndDeepMemberIDs(ids, graph));
-       } // returns an selector to select entity ids for:
-       //  - entityIDs passed in
-       //  - deep descendant entityIDs for any of those entities that are relations
-
-       function utilEntityAndDeepMemberIDs(ids, graph) {
-         var seen = new Set();
-         ids.forEach(collectDeepDescendants);
-         return Array.from(seen);
-
-         function collectDeepDescendants(id) {
-           if (seen.has(id)) return;
-           seen.add(id);
-           var entity = graph.hasEntity(id);
-           if (!entity || entity.type !== 'relation') return;
-           entity.members.map(function (member) {
-             return member.id;
-           }).forEach(collectDeepDescendants); // recurse
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "SS",
+           iso1A3: "SSD",
+           iso1N3: "728",
+           wikidata: "Q958",
+           nameEn: "South Sudan",
+           groups: ["014", "202", "002", "UN"],
+           callingCodes: ["211"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[34.10229, 9.50238], [33.87958, 9.49937], [33.9082, 9.762], [33.96323, 9.80972], [33.99185, 9.99623], [33.96984, 10.15446], [33.90159, 10.17179], [33.80913, 10.32994], [33.66604, 10.44254], [33.52294, 10.64382], [33.24645, 10.77913], [33.26977, 10.83632], [33.13988, 11.43248], [33.25876, 12.22111], [32.73921, 12.22757], [32.73921, 11.95203], [32.10079, 11.95203], [32.39578, 11.70208], [32.39358, 11.18207], [32.46967, 11.04662], [31.99177, 10.65065], [31.77539, 10.28939], [31.28504, 9.75287], [30.84605, 9.7498], [30.82893, 9.71451], [30.53005, 9.95992], [30.00389, 10.28633], [29.94629, 10.29245], [29.54, 10.07949], [29.53844, 9.75133], [29.06988, 9.74826], [28.99983, 9.67155], [27.90704, 9.61323], [27.14427, 9.62858], [26.70685, 9.48735], [26.35815, 9.57946], [26.21338, 9.91545], [25.93241, 10.17941], [25.93163, 10.38159], [25.78141, 10.42599], [25.0918, 10.33718], [25.05688, 10.06776], [24.97739, 9.9081], [24.84653, 9.80643], [24.49389, 9.79962], [24.12744, 9.73784], [24.09319, 9.66572], [23.69155, 9.67566], [23.62179, 9.53823], [23.64981, 9.44303], [23.64358, 9.28637], [23.56263, 9.19418], [23.4848, 9.16959], [23.44744, 8.99128], [23.59065, 8.99743], [23.51905, 8.71749], [24.25691, 8.69288], [24.13238, 8.36959], [24.35965, 8.26177], [24.85156, 8.16933], [24.98855, 7.96588], [25.25319, 7.8487], [25.29214, 7.66675], [25.20649, 7.61115], [25.20337, 7.50312], [25.35281, 7.42595], [25.37461, 7.33024], [25.90076, 7.09549], [26.38022, 6.63493], [26.32729, 6.36272], [26.58259, 6.1987], [26.51721, 6.09655], [27.22705, 5.71254], [27.22705, 5.62889], [27.28621, 5.56382], [27.23017, 5.37167], [27.26886, 5.25876], [27.44012, 5.07349], [27.56656, 4.89375], [27.65462, 4.89375], [27.76469, 4.79284], [27.79551, 4.59976], [28.20719, 4.35614], [28.6651, 4.42638], [28.8126, 4.48784], [29.03054, 4.48784], [29.22207, 4.34297], [29.43341, 4.50101], [29.49726, 4.7007], [29.82087, 4.56246], [29.79666, 4.37809], [30.06964, 4.13221], [30.1621, 4.10586], [30.22374, 3.93896], [30.27658, 3.95653], [30.47691, 3.83353], [30.55396, 3.84451], [30.57378, 3.74567], [30.56277, 3.62703], [30.78512, 3.67097], [30.80713, 3.60506], [30.85997, 3.5743], [30.85153, 3.48867], [30.97601, 3.693], [31.16666, 3.79853], [31.29476, 3.8015], [31.50478, 3.67814], [31.50776, 3.63652], [31.72075, 3.74354], [31.81459, 3.82083], [31.86821, 3.78664], [31.96205, 3.6499], [31.95907, 3.57408], [32.05187, 3.589], [32.08491, 3.56287], [32.08866, 3.53543], [32.19888, 3.50867], [32.20782, 3.6053], [32.41337, 3.748], [32.72021, 3.77327], [32.89746, 3.81339], [33.02852, 3.89296], [33.18356, 3.77812], [33.51264, 3.75068], [33.9873, 4.23316], [34.47601, 4.72162], [35.34151, 5.02364], [35.30992, 4.90402], [35.47843, 4.91872], [35.42366, 4.76969], [35.51424, 4.61643], [35.9419, 4.61933], [35.82118, 4.77382], [35.81968, 5.10757], [35.8576, 5.33413], [35.50792, 5.42431], [35.29938, 5.34042], [35.31188, 5.50106], [35.13058, 5.62118], [35.12611, 5.68937], [35.00546, 5.89387], [34.96227, 6.26415], [35.01738, 6.46991], [34.87736, 6.60161], [34.77459, 6.5957], [34.65096, 6.72589], [34.53776, 6.74808], [34.53925, 6.82794], [34.47669, 6.91076], [34.35753, 6.91963], [34.19369, 7.04382], [34.19369, 7.12807], [34.01495, 7.25664], [34.03878, 7.27437], [34.02984, 7.36449], [33.87642, 7.5491], [33.71407, 7.65983], [33.44745, 7.7543], [33.32531, 7.71297], [33.24637, 7.77939], [33.04944, 7.78989], [33.0006, 7.90333], [33.08401, 8.05822], [33.18083, 8.13047], [33.1853, 8.29264], [33.19721, 8.40317], [33.3119, 8.45474], [33.54575, 8.47094], [33.66938, 8.44442], [33.71407, 8.3678], [33.87195, 8.41938], [33.89579, 8.4842], [34.01346, 8.50041], [34.14453, 8.60204], [34.14304, 9.04654], [34.10229, 9.50238]]]]
          }
-       } // returns an selector to select entity ids for:
-       //  - deep descendant entityIDs for any of those entities that are relations
-
-       function utilDeepMemberSelector(ids, graph, skipMultipolgonMembers) {
-         var idsSet = new Set(ids);
-         var seen = new Set();
-         var returners = new Set();
-         ids.forEach(collectDeepDescendants);
-         return utilEntitySelector(Array.from(returners));
-
-         function collectDeepDescendants(id) {
-           if (seen.has(id)) return;
-           seen.add(id);
-
-           if (!idsSet.has(id)) {
-             returners.add(id);
-           }
-
-           var entity = graph.hasEntity(id);
-           if (!entity || entity.type !== 'relation') return;
-           if (skipMultipolgonMembers && entity.isMultipolygon()) return;
-           entity.members.map(function (member) {
-             return member.id;
-           }).forEach(collectDeepDescendants); // recurse
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "ST",
+           iso1A3: "STP",
+           iso1N3: "678",
+           wikidata: "Q1039",
+           nameEn: "S\xE3o Tom\xE9 and Principe",
+           groups: ["017", "202", "002", "UN"],
+           callingCodes: ["239"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[4.34149, 1.91417], [6.6507, -0.28606], [7.9035, 1.92304], [4.34149, 1.91417]]]]
          }
-       } // Adds or removes highlight styling for the specified entities
-
-       function utilHighlightEntities(ids, highlighted, context) {
-         context.surface().selectAll(utilEntityOrDeepMemberSelector(ids, context.graph())).classed('highlighted', highlighted);
-       } // returns an Array that is the union of:
-       //  - nodes for any nodeIDs passed in
-       //  - child nodes of any wayIDs passed in
-       //  - descendant member and child nodes of relationIDs passed in
-
-       function utilGetAllNodes(ids, graph) {
-         var seen = new Set();
-         var nodes = new Set();
-         ids.forEach(collectNodes);
-         return Array.from(nodes);
-
-         function collectNodes(id) {
-           if (seen.has(id)) return;
-           seen.add(id);
-           var entity = graph.hasEntity(id);
-           if (!entity) return;
-
-           if (entity.type === 'node') {
-             nodes.add(entity);
-           } else if (entity.type === 'way') {
-             entity.nodes.forEach(collectNodes);
-           } else {
-             entity.members.map(function (member) {
-               return member.id;
-             }).forEach(collectNodes); // recurse
-           }
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "SV",
+           iso1A3: "SLV",
+           iso1N3: "222",
+           wikidata: "Q792",
+           nameEn: "El Salvador",
+           groups: ["013", "003", "419", "019", "UN"],
+           callingCodes: ["503"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[-89.34776, 14.43013], [-89.39028, 14.44561], [-89.57441, 14.41637], [-89.58814, 14.33165], [-89.50614, 14.26084], [-89.52397, 14.22628], [-89.61844, 14.21937], [-89.70756, 14.1537], [-89.75569, 14.07073], [-89.73251, 14.04133], [-89.76103, 14.02923], [-89.81807, 14.07073], [-89.88937, 14.0396], [-90.10505, 13.85104], [-90.11344, 13.73679], [-90.55276, 12.8866], [-88.11443, 12.63306], [-87.7346, 13.13228], [-87.55124, 13.12523], [-87.69751, 13.25228], [-87.73714, 13.32715], [-87.80177, 13.35689], [-87.84675, 13.41078], [-87.83467, 13.44655], [-87.77354, 13.45767], [-87.73841, 13.44169], [-87.72115, 13.46083], [-87.71657, 13.50577], [-87.78148, 13.52906], [-87.73106, 13.75443], [-87.68821, 13.80829], [-87.7966, 13.91353], [-88.00331, 13.86948], [-88.07641, 13.98447], [-88.23018, 13.99915], [-88.25791, 13.91108], [-88.48982, 13.86458], [-88.49738, 13.97224], [-88.70661, 14.04317], [-88.73182, 14.10919], [-88.815, 14.11652], [-88.85785, 14.17763], [-88.94608, 14.20207], [-89.04187, 14.33644], [-89.34776, 14.43013]]]]
          }
-       }
-       function utilDisplayName(entity) {
-         var localizedNameKey = 'name:' + _mainLocalizer.languageCode().toLowerCase();
-         var name = entity.tags[localizedNameKey] || entity.tags.name || '';
-         var network = entity.tags.cycle_network || entity.tags.network;
-
-         if (!name && entity.tags.ref) {
-           name = entity.tags.ref;
-
-           if (network) {
-             name = network + ' ' + name;
-           }
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "SX",
+           iso1A3: "SXM",
+           iso1N3: "534",
+           wikidata: "Q26273",
+           nameEn: "Sint Maarten",
+           aliases: ["NL-SX"],
+           country: "NL",
+           groups: ["Q1451600", "029", "003", "419", "019", "UN"],
+           callingCodes: ["1 721"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[-63.33064, 17.9615], [-63.1055, 17.86651], [-62.93924, 18.02904], [-63.02323, 18.05757], [-63.04039, 18.05619], [-63.0579, 18.06614], [-63.07759, 18.04943], [-63.09686, 18.04608], [-63.11042, 18.05339], [-63.13502, 18.05445], [-63.33064, 17.9615]]]]
          }
-
-         return name;
-       }
-       function utilDisplayNameForPath(entity) {
-         var name = utilDisplayName(entity);
-         var isFirefox = utilDetect().browser.toLowerCase().indexOf('firefox') > -1;
-
-         if (!isFirefox && name && rtlRegex.test(name)) {
-           name = fixRTLTextForSvg(name);
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "SY",
+           iso1A3: "SYR",
+           iso1N3: "760",
+           wikidata: "Q858",
+           nameEn: "Syria",
+           groups: ["145", "142", "UN"],
+           callingCodes: ["963"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[42.23683, 37.2863], [42.21548, 37.28026], [42.20454, 37.28715], [42.22381, 37.30238], [42.22257, 37.31395], [42.2112, 37.32491], [42.19301, 37.31323], [42.18225, 37.28569], [42.00894, 37.17209], [41.515, 37.08084], [41.21937, 37.07665], [40.90856, 37.13147], [40.69136, 37.0996], [39.81589, 36.75538], [39.21538, 36.66834], [39.03217, 36.70911], [38.74042, 36.70629], [38.55908, 36.84429], [38.38859, 36.90064], [38.21064, 36.91842], [37.81974, 36.76055], [37.68048, 36.75065], [37.49103, 36.66904], [37.47253, 36.63243], [37.21988, 36.6736], [37.16177, 36.66069], [37.10894, 36.6704], [37.08279, 36.63495], [37.02088, 36.66422], [37.01647, 36.69512], [37.04619, 36.71101], [37.04399, 36.73483], [36.99886, 36.74012], [36.99557, 36.75997], [36.66727, 36.82901], [36.61581, 36.74629], [36.62681, 36.71189], [36.57398, 36.65186], [36.58829, 36.58295], [36.54206, 36.49539], [36.6081, 36.33772], [36.65653, 36.33861], [36.68672, 36.23677], [36.6125, 36.22592], [36.50463, 36.2419], [36.4617, 36.20461], [36.39206, 36.22088], [36.37474, 36.01163], [36.33956, 35.98687], [36.30099, 36.00985], [36.28338, 36.00273], [36.29769, 35.96086], [36.27678, 35.94839], [36.25366, 35.96264], [36.19973, 35.95195], [36.17441, 35.92076], [36.1623, 35.80925], [36.14029, 35.81015], [36.13919, 35.83692], [36.11827, 35.85923], [35.99829, 35.88242], [36.01844, 35.92403], [36.00514, 35.94113], [35.98499, 35.94107], [35.931, 35.92109], [35.51152, 36.10954], [35.48515, 34.70851], [35.97386, 34.63322], [35.98718, 34.64977], [36.29165, 34.62991], [36.32399, 34.69334], [36.35135, 34.68516], [36.35384, 34.65447], [36.42941, 34.62505], [36.46003, 34.6378], [36.45299, 34.59438], [36.41429, 34.61175], [36.39846, 34.55672], [36.3369, 34.52629], [36.34745, 34.5002], [36.4442, 34.50165], [36.46179, 34.46541], [36.55853, 34.41609], [36.53039, 34.3798], [36.56556, 34.31881], [36.60778, 34.31009], [36.58667, 34.27667], [36.59195, 34.2316], [36.62537, 34.20251], [36.5128, 34.09916], [36.50576, 34.05982], [36.41078, 34.05253], [36.28589, 33.91981], [36.38263, 33.86579], [36.3967, 33.83365], [36.14517, 33.85118], [36.06778, 33.82927], [35.9341, 33.6596], [36.05723, 33.57904], [35.94465, 33.52774], [35.94816, 33.47886], [35.88668, 33.43183], [35.82577, 33.40479], [35.81324, 33.36354], [35.77477, 33.33609], [35.813, 33.3172], [35.77513, 33.27342], [35.81295, 33.24841], [35.81647, 33.2028], [35.83846, 33.19397], [35.84285, 33.16673], [35.81911, 33.1336], [35.81911, 33.11077], [35.84802, 33.1031], [35.87188, 32.98028], [35.89298, 32.9456], [35.87012, 32.91976], [35.84021, 32.8725], [35.83758, 32.82817], [35.78745, 32.77938], [35.75983, 32.74803], [35.88405, 32.71321], [35.93307, 32.71966], [35.96633, 32.66237], [36.02239, 32.65911], [36.08074, 32.51463], [36.20379, 32.52751], [36.20875, 32.49529], [36.23948, 32.50108], [36.40959, 32.37908], [36.83946, 32.31293], [38.79171, 33.37328], [40.64314, 34.31604], [40.97676, 34.39788], [41.12388, 34.65742], [41.2345, 34.80049], [41.21654, 35.1508], [41.26569, 35.42708], [41.38184, 35.62502], [41.37027, 35.84095], [41.2564, 36.06012], [41.28864, 36.35368], [41.40058, 36.52502], [41.81736, 36.58782], [42.36697, 37.0627], [42.35724, 37.10998], [42.32313, 37.17814], [42.34735, 37.22548], [42.2824, 37.2798], [42.26039, 37.27017], [42.23683, 37.2863]]]]
          }
-
-         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);
-
-         if (displayName) {
-           // use the display name if there is one
-           return displayName;
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "SZ",
+           iso1A3: "SWZ",
+           iso1N3: "748",
+           wikidata: "Q1050",
+           nameEn: "Eswatini",
+           aliases: ["Swaziland"],
+           groups: ["018", "202", "002", "UN"],
+           driveSide: "left",
+           callingCodes: ["268"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[31.86881, -25.99973], [31.4175, -25.71886], [31.31237, -25.7431], [31.13073, -25.91558], [30.95819, -26.26303], [30.78927, -26.48271], [30.81101, -26.84722], [30.88826, -26.79622], [30.97757, -26.92706], [30.96088, -27.0245], [31.15027, -27.20151], [31.49834, -27.31549], [31.97592, -27.31675], [31.97463, -27.11057], [32.00893, -26.8096], [32.09664, -26.80721], [32.13315, -26.84345], [32.13409, -26.5317], [32.07352, -26.40185], [32.10435, -26.15656], [32.08599, -26.00978], [32.00916, -25.999], [31.974, -25.95387], [31.86881, -25.99973]]]]
          }
-
-         var preset = typeof graphOrGeometry === 'string' ? _mainPresetIndex.matchTags(entity.tags, graphOrGeometry) : _mainPresetIndex.match(entity, graphOrGeometry);
-
-         if (preset && preset.name()) {
-           // use the preset name if there is a match
-           return preset.name();
-         } // fallback to the display type (node/way/relation)
-
-
-         return utilDisplayType(entity.id);
-       }
-       function utilEntityRoot(entityType) {
-         return {
-           node: 'n',
-           way: 'w',
-           relation: 'r'
-         }[entityType];
-       } // Returns a single object containing the tags of all the given entities.
-       // Example:
-       // {
-       //   highway: 'service',
-       //   service: 'parking_aisle'
-       // }
-       //           +
-       // {
-       //   highway: 'service',
-       //   service: 'driveway',
-       //   width: '3'
-       // }
-       //           =
-       // {
-       //   highway: 'service',
-       //   service: [ 'driveway', 'parking_aisle' ],
-       //   width: [ '3', undefined ]
-       // }
-
-       function utilCombinedTags(entityIDs, graph) {
-         var tags = {};
-         var tagCounts = {};
-         var allKeys = new Set();
-         var entities = entityIDs.map(function (entityID) {
-           return graph.hasEntity(entityID);
-         }).filter(Boolean); // gather the aggregate keys
-
-         entities.forEach(function (entity) {
-           var keys = Object.keys(entity.tags).filter(Boolean);
-           keys.forEach(function (key) {
-             allKeys.add(key);
-           });
-         });
-         entities.forEach(function (entity) {
-           allKeys.forEach(function (key) {
-             var value = entity.tags[key]; // purposely allow `undefined`
-
-             if (!tags.hasOwnProperty(key)) {
-               // first value, set as raw
-               tags[key] = value;
-             } else {
-               if (!Array.isArray(tags[key])) {
-                 if (tags[key] !== value) {
-                   // first alternate value, replace single value with array
-                   tags[key] = [tags[key], value];
-                 }
-               } else {
-                 // type is array
-                 if (tags[key].indexOf(value) === -1) {
-                   // subsequent alternate value, add to array
-                   tags[key].push(value);
-                 }
-               }
-             }
-
-             var tagHash = key + '=' + value;
-             if (!tagCounts[tagHash]) tagCounts[tagHash] = 0;
-             tagCounts[tagHash] += 1;
-           });
-         });
-
-         for (var key in tags) {
-           if (!Array.isArray(tags[key])) continue; // sort values by frequency then alphabetically
-
-           tags[key] = tags[key].sort(function (val1, val2) {
-             var key = key; // capture
-
-             var count2 = tagCounts[key + '=' + val2];
-             var count1 = tagCounts[key + '=' + val1];
-
-             if (count2 !== count1) {
-               return count2 - count1;
-             }
-
-             if (val2 && val1) {
-               return val1.localeCompare(val2);
-             }
-
-             return val1 ? 1 : -1;
-           });
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "TA",
+           iso1A3: "TAA",
+           wikidata: "Q220982",
+           nameEn: "Tristan da Cunha",
+           aliases: ["SH-TA"],
+           country: "GB",
+           groups: ["SH", "BOTS", "011", "202", "002", "UN"],
+           isoStatus: "excRes",
+           driveSide: "left",
+           roadSpeedUnit: "mph",
+           roadHeightUnit: "ft",
+           callingCodes: ["290 8", "44 20"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[-13.38232, -34.07258], [-16.67337, -41.9188], [-5.88482, -41.4829], [-13.38232, -34.07258]]]]
          }
-
-         return tags;
-       }
-       function utilStringQs(str) {
-         var i = 0; // advance past any leading '?' or '#' characters
-
-         while (i < str.length && (str[i] === '?' || str[i] === '#')) {
-           i++;
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "TC",
+           iso1A3: "TCA",
+           iso1N3: "796",
+           wikidata: "Q18221",
+           nameEn: "Turks and Caicos Islands",
+           country: "GB",
+           groups: ["BOTS", "029", "003", "419", "019", "UN"],
+           driveSide: "left",
+           roadSpeedUnit: "mph",
+           roadHeightUnit: "ft",
+           callingCodes: ["1 649"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[-71.70065, 25.7637], [-72.98446, 20.4801], [-69.80718, 21.35956], [-71.70065, 25.7637]]]]
          }
-
-         str = str.slice(i);
-         return str.split('&').reduce(function (obj, pair) {
-           var parts = pair.split('=');
-
-           if (parts.length === 2) {
-             obj[parts[0]] = null === parts[1] ? '' : decodeURIComponent(parts[1]);
-           }
-
-           return obj;
-         }, {});
-       }
-       function utilQsString(obj, noencode) {
-         // encode everything except special characters used in certain hash parameters:
-         // "/" in map states, ":", ",", {" and "}" in background
-         function softEncode(s) {
-           return encodeURIComponent(s).replace(/(%2F|%3A|%2C|%7B|%7D)/g, decodeURIComponent);
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "TD",
+           iso1A3: "TCD",
+           iso1N3: "148",
+           wikidata: "Q657",
+           nameEn: "Chad",
+           groups: ["017", "202", "002", "UN"],
+           callingCodes: ["235"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[23.99539, 19.49944], [15.99566, 23.49639], [14.99751, 23.00539], [15.19692, 21.99339], [15.20213, 21.49365], [15.28332, 21.44557], [15.62515, 20.95395], [15.57248, 20.92138], [15.55382, 20.86507], [15.56004, 20.79488], [15.59841, 20.74039], [15.6721, 20.70069], [15.99632, 20.35364], [15.75098, 19.93002], [15.6032, 18.77402], [15.50373, 16.89649], [14.37425, 15.72591], [13.86301, 15.04043], [13.78991, 14.87519], [13.809, 14.72915], [13.67878, 14.64013], [13.68573, 14.55276], [13.48259, 14.46704], [13.47559, 14.40881], [13.6302, 13.71094], [14.08251, 13.0797], [14.46881, 13.08259], [14.56101, 12.91036], [14.55058, 12.78256], [14.83314, 12.62963], [14.90827, 12.3269], [14.89019, 12.16593], [14.96952, 12.0925], [15.00146, 12.1223], [15.0349, 12.10698], [15.05786, 12.0608], [15.04808, 11.8731], [15.11579, 11.79313], [15.06595, 11.71126], [15.13149, 11.5537], [15.0585, 11.40481], [15.10021, 11.04101], [15.04957, 11.02347], [15.09127, 10.87431], [15.06737, 10.80921], [15.15532, 10.62846], [15.14936, 10.53915], [15.23724, 10.47764], [15.30874, 10.31063], [15.50535, 10.1098], [15.68761, 9.99344], [15.41408, 9.92876], [15.24618, 9.99246], [15.14043, 9.99246], [15.05999, 9.94845], [14.95722, 9.97926], [14.80082, 9.93818], [14.4673, 10.00264], [14.20411, 10.00055], [14.1317, 9.82413], [14.01793, 9.73169], [13.97544, 9.6365], [14.37094, 9.2954], [14.35707, 9.19611], [14.83566, 8.80557], [15.09484, 8.65982], [15.20426, 8.50892], [15.50743, 7.79302], [15.59272, 7.7696], [15.56964, 7.58936], [15.49743, 7.52179], [15.73118, 7.52006], [15.79942, 7.44149], [16.40703, 7.68809], [16.41583, 7.77971], [16.58315, 7.88657], [16.59415, 7.76444], [16.658, 7.75353], [16.6668, 7.67281], [16.8143, 7.53971], [17.67288, 7.98905], [17.93926, 7.95853], [18.02731, 8.01085], [18.6085, 8.05009], [18.64153, 8.08714], [18.62612, 8.14163], [18.67455, 8.22226], [18.79783, 8.25929], [19.11044, 8.68172], [18.86388, 8.87971], [19.06421, 9.00367], [20.36748, 9.11019], [20.82979, 9.44696], [21.26348, 9.97642], [21.34934, 9.95907], [21.52766, 10.2105], [21.63553, 10.217], [21.71479, 10.29932], [21.72139, 10.64136], [22.45889, 11.00246], [22.87758, 10.91915], [22.97249, 11.21955], [22.93124, 11.41645], [22.7997, 11.40424], [22.54907, 11.64372], [22.64092, 12.07485], [22.48369, 12.02766], [22.50548, 12.16769], [22.38873, 12.45514], [22.46345, 12.61925], [22.22684, 12.74682], [22.15679, 12.66634], [21.98711, 12.63292], [21.89371, 12.68001], [21.81432, 12.81362], [21.94819, 13.05637], [22.02914, 13.13976], [22.1599, 13.19281], [22.29689, 13.3731], [22.08674, 13.77863], [22.22995, 13.96754], [22.5553, 14.11704], [22.55997, 14.23024], [22.44944, 14.24986], [22.38562, 14.58907], [22.70474, 14.69149], [22.66115, 14.86308], [22.99584, 15.22989], [22.99584, 15.40105], [22.92579, 15.47007], [22.93201, 15.55107], [23.10792, 15.71297], [23.38812, 15.69649], [23.62785, 15.7804], [23.99997, 15.69575], [23.99539, 19.49944]]]]
          }
-
-         return Object.keys(obj).sort().map(function (key) {
-           return encodeURIComponent(key) + '=' + (noencode ? softEncode(obj[key]) : encodeURIComponent(obj[key]));
-         }).join('&');
-       }
-       function utilPrefixDOMProperty(property) {
-         var prefixes = ['webkit', 'ms', 'moz', 'o'];
-         var i = -1;
-         var n = prefixes.length;
-         var s = document.body;
-         if (property in s) return property;
-         property = property.substr(0, 1).toUpperCase() + property.substr(1);
-
-         while (++i < n) {
-           if (prefixes[i] + property in s) {
-             return prefixes[i] + property;
-           }
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "TF",
+           iso1A3: "ATF",
+           iso1N3: "260",
+           wikidata: "Q129003",
+           nameEn: "French Southern Territories",
+           country: "FR"
+         },
+         geometry: null
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "TG",
+           iso1A3: "TGO",
+           iso1N3: "768",
+           wikidata: "Q945",
+           nameEn: "Togo",
+           groups: ["011", "202", "002", "UN"],
+           callingCodes: ["228"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[0.50388, 11.01011], [-0.13493, 11.14075], [-0.14462, 11.10811], [-0.05733, 11.08628], [-0.0275, 11.11202], [-514e-5, 11.10763], [342e-5, 11.08317], [0.02395, 11.06229], [0.03355, 10.9807], [-63e-4, 10.96417], [-908e-5, 10.91644], [-0.02685, 10.8783], [-0.0228, 10.81916], [-0.07183, 10.76794], [-0.07327, 10.71845], [-0.09141, 10.7147], [-0.05945, 10.63458], [0.12886, 10.53149], [0.18846, 10.4096], [0.29453, 10.41546], [0.33028, 10.30408], [0.39584, 10.31112], [0.35293, 10.09412], [0.41371, 10.06361], [0.41252, 10.02018], [0.36366, 10.03309], [0.32075, 9.72781], [0.34816, 9.71607], [0.34816, 9.66907], [0.32313, 9.6491], [0.28261, 9.69022], [0.26712, 9.66437], [0.29334, 9.59387], [0.36008, 9.6256], [0.38153, 9.58682], [0.23851, 9.57389], [0.2409, 9.52335], [0.30406, 9.521], [0.31241, 9.50337], [0.2254, 9.47869], [0.25758, 9.42696], [0.33148, 9.44812], [0.36485, 9.49749], [0.49118, 9.48339], [0.56388, 9.40697], [0.45424, 9.04581], [0.52455, 8.87746], [0.37319, 8.75262], [0.47211, 8.59945], [0.64731, 8.48866], [0.73432, 8.29529], [0.63897, 8.25873], [0.5913, 8.19622], [0.61156, 8.18324], [0.6056, 8.13959], [0.58891, 8.12779], [0.62943, 7.85751], [0.58295, 7.62368], [0.51979, 7.58706], [0.52455, 7.45354], [0.57223, 7.39326], [0.62943, 7.41099], [0.65327, 7.31643], [0.59606, 7.01252], [0.52217, 6.9723], [0.52098, 6.94391], [0.56508, 6.92971], [0.52853, 6.82921], [0.57406, 6.80348], [0.58176, 6.76049], [0.6497, 6.73682], [0.63659, 6.63857], [0.74862, 6.56517], [0.71048, 6.53083], [0.89283, 6.33779], [0.99652, 6.33779], [1.03108, 6.24064], [1.05969, 6.22998], [1.09187, 6.17074], [1.19966, 6.17069], [1.19771, 6.11522], [1.27574, 5.93551], [1.67336, 6.02702], [1.62913, 6.24075], [1.79826, 6.28221], [1.76906, 6.43189], [1.58105, 6.68619], [1.61812, 6.74843], [1.55877, 6.99737], [1.64249, 6.99562], [1.61838, 9.0527], [1.5649, 9.16941], [1.41746, 9.3226], [1.33675, 9.54765], [1.36624, 9.5951], [1.35507, 9.99525], [0.77666, 10.37665], [0.80358, 10.71459], [0.8804, 10.803], [0.91245, 10.99597], [0.66104, 10.99964], [0.4958, 10.93269], [0.50521, 10.98035], [0.48852, 10.98561], [0.50388, 11.01011]]]]
          }
-
-         return false;
-       }
-       function utilPrefixCSSProperty(property) {
-         var prefixes = ['webkit', 'ms', 'Moz', 'O'];
-         var i = -1;
-         var n = prefixes.length;
-         var s = document.body.style;
-
-         if (property.toLowerCase() in s) {
-           return property.toLowerCase();
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "TH",
+           iso1A3: "THA",
+           iso1N3: "764",
+           wikidata: "Q869",
+           nameEn: "Thailand",
+           groups: ["035", "142", "UN"],
+           driveSide: "left",
+           callingCodes: ["66"]
+         },
+         geometry: {
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+         }
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "TK",
+           iso1A3: "TKL",
+           iso1N3: "772",
+           wikidata: "Q36823",
+           nameEn: "Tokelau",
+           country: "NZ",
+           groups: ["061", "009", "UN"],
+           driveSide: "left",
+           callingCodes: ["690"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[-168.251, -9.44289], [-174.18635, -7.80441], [-174.17993, -10.13616], [-168.251, -9.44289]]]]
          }
-
-         while (++i < n) {
-           if (prefixes[i] + property in s) {
-             return '-' + prefixes[i].toLowerCase() + property.replace(/([A-Z])/g, '-$1').toLowerCase();
-           }
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "TL",
+           iso1A3: "TLS",
+           iso1N3: "626",
+           wikidata: "Q574",
+           nameEn: "East Timor",
+           aliases: ["Timor-Leste", "TP"],
+           groups: ["035", "142", "UN"],
+           driveSide: "left",
+           callingCodes: ["670"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[124.46701, -9.13002], [124.94011, -8.85617], [124.97742, -9.08128], [125.11764, -8.96359], [125.18632, -9.03142], [125.18907, -9.16434], [125.09434, -9.19669], [125.04044, -9.17093], [124.97892, -9.19281], [125.09025, -9.46406], [125.68138, -9.85176], [127.55165, -9.05052], [127.42116, -8.22471], [125.87691, -8.31789], [125.58506, -7.95311], [124.92337, -8.75859], [124.33472, -9.11416], [124.04628, -9.22671], [124.04286, -9.34243], [124.10539, -9.41206], [124.14517, -9.42324], [124.21247, -9.36904], [124.28115, -9.42189], [124.28115, -9.50453], [124.3535, -9.48493], [124.35258, -9.43002], [124.38554, -9.3582], [124.45971, -9.30263], [124.46701, -9.13002]]]]
          }
-
-         return false;
-       }
-       var transformProperty;
-       function utilSetTransform(el, x, y, scale) {
-         var prop = transformProperty = transformProperty || utilPrefixCSSProperty('Transform');
-         var translate = utilDetect().opera ? 'translate(' + x + 'px,' + y + 'px)' : 'translate3d(' + x + 'px,' + y + 'px,0)';
-         return el.style(prop, translate + (scale ? ' scale(' + scale + ')' : ''));
-       } // Calculates Levenshtein distance between two strings
-       // see:  https://en.wikipedia.org/wiki/Levenshtein_distance
-       // first converts the strings to lowercase and replaces diacritic marks with ascii equivalents.
-
-       function utilEditDistance(a, b) {
-         a = remove$1(a.toLowerCase());
-         b = remove$1(b.toLowerCase());
-         if (a.length === 0) return b.length;
-         if (b.length === 0) return a.length;
-         var matrix = [];
-         var i, j;
-
-         for (i = 0; i <= b.length; i++) {
-           matrix[i] = [i];
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "TM",
+           iso1A3: "TKM",
+           iso1N3: "795",
+           wikidata: "Q874",
+           nameEn: "Turkmenistan",
+           groups: ["143", "142", "UN"],
+           callingCodes: ["993"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[60.5078, 41.21694], [60.06581, 41.4363], [60.18117, 41.60082], [60.06032, 41.76287], [60.08504, 41.80997], [60.33223, 41.75058], [59.95046, 41.97966], [60.0356, 42.01028], [60.04659, 42.08982], [59.96419, 42.1428], [60.00539, 42.212], [59.94633, 42.27655], [59.4341, 42.29738], [59.2955, 42.37064], [59.17317, 42.52248], [58.93422, 42.5407], [58.6266, 42.79314], [58.57991, 42.64988], [58.27504, 42.69632], [58.14321, 42.62159], [58.29427, 42.56497], [58.51674, 42.30348], [58.40688, 42.29535], [58.3492, 42.43335], [57.99214, 42.50021], [57.90975, 42.4374], [57.92897, 42.24047], [57.84932, 42.18555], [57.6296, 42.16519], [57.30275, 42.14076], [57.03633, 41.92043], [56.96218, 41.80383], [57.03359, 41.41777], [57.13796, 41.36625], [57.03423, 41.25435], [56.00314, 41.32584], [55.45471, 41.25609], [54.95182, 41.92424], [54.20635, 42.38477], [52.97575, 42.1308], [52.47884, 41.78034], [52.26048, 41.69249], [51.7708, 40.29239], [53.89734, 37.3464], [54.24565, 37.32047], [54.36211, 37.34912], [54.58664, 37.45809], [54.67247, 37.43532], [54.77822, 37.51597], [54.81804, 37.61285], [54.77684, 37.62264], [54.851, 37.75739], [55.13412, 37.94705], [55.44152, 38.08564], [55.76561, 38.12238], [55.97847, 38.08024], [56.33278, 38.08132], [56.32454, 38.18502], [56.43303, 38.26054], [56.62255, 38.24005], [56.73928, 38.27887], [57.03453, 38.18717], [57.21169, 38.28965], [57.37236, 38.09321], [57.35042, 37.98546], [57.79534, 37.89299], [58.21399, 37.77281], [58.22999, 37.6856], [58.39959, 37.63134], [58.47786, 37.6433], [58.5479, 37.70526], [58.6921, 37.64548], [58.9338, 37.67374], [59.22905, 37.51161], [59.33507, 37.53146], [59.39797, 37.47892], [59.39385, 37.34257], [59.55178, 37.13594], [59.74678, 37.12499], [60.00768, 37.04102], [60.34767, 36.63214], [61.14516, 36.64644], [61.18187, 36.55348], [61.1393, 36.38782], [61.22719, 36.12759], [61.12007, 35.95992], [61.22444, 35.92879], [61.26152, 35.80749], [61.22719, 35.67038], [61.27371, 35.61482], [61.58742, 35.43803], [61.77693, 35.41341], [61.97743, 35.4604], [62.05709, 35.43803], [62.15871, 35.33278], [62.29191, 35.25964], [62.29878, 35.13312], [62.48006, 35.28796], [62.62288, 35.22067], [62.74098, 35.25432], [62.90853, 35.37086], [63.0898, 35.43131], [63.12276, 35.53196], [63.10079, 35.63024], [63.23262, 35.67487], [63.10318, 35.81782], [63.12276, 35.86208], [63.29579, 35.85985], [63.53475, 35.90881], [63.56496, 35.95106], [63.98519, 36.03773], [64.05385, 36.10433], [64.43288, 36.24401], [64.57295, 36.34362], [64.62514, 36.44311], [64.61141, 36.6351], [64.97945, 37.21913], [65.51778, 37.23881], [65.64263, 37.34388], [65.64137, 37.45061], [65.72274, 37.55438], [66.30993, 37.32409], [66.55743, 37.35409], [66.52303, 37.39827], [66.65761, 37.45497], [66.52852, 37.58568], [66.53676, 37.80084], [66.67684, 37.96776], [66.56697, 38.0435], [66.41042, 38.02403], [66.24013, 38.16238], [65.83913, 38.25733], [65.55873, 38.29052], [64.32576, 38.98691], [64.19086, 38.95561], [63.70778, 39.22349], [63.6913, 39.27666], [62.43337, 39.98528], [62.34273, 40.43206], [62.11751, 40.58242], [61.87856, 41.12257], [61.4446, 41.29407], [61.39732, 41.19873], [61.33199, 41.14946], [61.22212, 41.14946], [61.03261, 41.25691], [60.5078, 41.21694]]]]
          }
-
-         for (j = 0; j <= a.length; j++) {
-           matrix[0][j] = j;
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "TN",
+           iso1A3: "TUN",
+           iso1N3: "788",
+           wikidata: "Q948",
+           nameEn: "Tunisia",
+           groups: ["015", "002", "UN"],
+           callingCodes: ["216"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[11.2718, 37.6713], [7.89009, 38.19924], [8.59123, 37.14286], [8.64044, 36.9401], [8.62972, 36.86499], [8.67706, 36.8364], [8.57613, 36.78062], [8.46537, 36.7706], [8.47609, 36.66607], [8.16167, 36.48817], [8.18936, 36.44939], [8.40731, 36.42208], [8.2626, 35.91733], [8.26472, 35.73669], [8.35371, 35.66373], [8.36086, 35.47774], [8.30329, 35.29884], [8.47318, 35.23376], [8.3555, 35.10007], [8.30727, 34.95378], [8.25189, 34.92009], [8.29655, 34.72798], [8.20482, 34.57575], [7.86264, 34.3987], [7.81242, 34.21841], [7.74207, 34.16492], [7.66174, 34.20167], [7.52851, 34.06493], [7.54088, 33.7726], [7.73687, 33.42114], [7.83028, 33.18851], [8.11433, 33.10175], [8.1179, 33.05086], [8.31895, 32.83483], [8.35999, 32.50101], [9.07483, 32.07865], [9.55544, 30.23971], [9.76848, 30.34366], [9.88152, 30.34074], [10.29516, 30.90337], [10.12239, 31.42098], [10.31364, 31.72648], [10.48497, 31.72956], [10.62788, 31.96629], [10.7315, 31.97235], [11.04234, 32.2145], [11.53898, 32.4138], [11.57828, 32.48013], [11.46037, 32.6307], [11.51549, 33.09826], [11.55852, 33.1409], [11.58941, 33.36891], [11.2718, 37.6713]]]]
          }
-
-         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
-             }
-           }
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "TO",
+           iso1A3: "TON",
+           iso1N3: "776",
+           wikidata: "Q678",
+           nameEn: "Tonga",
+           groups: ["061", "009", "UN"],
+           driveSide: "left",
+           callingCodes: ["676"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[-176.74538, -22.89767], [-180, -22.90585], [-180, -24.21376], [-173.10761, -24.19665], [-173.13438, -14.94228], [-176.76826, -14.95183], [-176.74538, -22.89767]]]]
          }
-
-         return matrix[b.length][a.length];
-       } // a d3.mouse-alike which
-       // 1. Only works on HTML elements, not SVG
-       // 2. Does not cause style recalculation
-
-       function utilFastMouse(container) {
-         var rect = container.getBoundingClientRect();
-         var rectLeft = rect.left;
-         var rectTop = rect.top;
-         var clientLeft = +container.clientLeft;
-         var clientTop = +container.clientTop;
-         return function (e) {
-           return [e.clientX - rectLeft - clientLeft, e.clientY - rectTop - clientTop];
-         };
-       }
-       function utilAsyncMap(inputs, func, callback) {
-         var remaining = inputs.length;
-         var results = [];
-         var errors = [];
-         inputs.forEach(function (d, i) {
-           func(d, function done(err, data) {
-             errors[i] = err;
-             results[i] = data;
-             remaining--;
-             if (!remaining) callback(errors, results);
-           });
-         });
-       } // wraps an index to an interval [0..length-1]
-
-       function utilWrap(index, length) {
-         if (index < 0) {
-           index += Math.ceil(-index / length) * length;
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "TR",
+           iso1A3: "TUR",
+           iso1N3: "792",
+           wikidata: "Q43",
+           nameEn: "Turkey",
+           groups: ["145", "142", "UN"],
+           callingCodes: ["90"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[41.54366, 41.52185], [40.89217, 41.72528], [34.8305, 42.4581], [28.32297, 41.98371], [28.02971, 41.98066], [27.91479, 41.97902], [27.83492, 41.99709], [27.81235, 41.94803], [27.69949, 41.97515], [27.55191, 41.90928], [27.52379, 41.93756], [27.45478, 41.96591], [27.27411, 42.10409], [27.22376, 42.10152], [27.19251, 42.06028], [27.08486, 42.08735], [27.03277, 42.0809], [26.95638, 42.00741], [26.79143, 41.97386], [26.62996, 41.97644], [26.56051, 41.92995], [26.57961, 41.90024], [26.53968, 41.82653], [26.36952, 41.82265], [26.33589, 41.76802], [26.32952, 41.73637], [26.35957, 41.71149], [26.47958, 41.67037], [26.5209, 41.62592], [26.59196, 41.60491], [26.59742, 41.48058], [26.61767, 41.42281], [26.62997, 41.34613], [26.5837, 41.32131], [26.5209, 41.33993], [26.39861, 41.25053], [26.32259, 41.24929], [26.31928, 41.07386], [26.3606, 41.02027], [26.33297, 40.98388], [26.35894, 40.94292], [26.32259, 40.94042], [26.28623, 40.93005], [26.29441, 40.89119], [26.26169, 40.9168], [26.20856, 40.86048], [26.21351, 40.83298], [26.15685, 40.80709], [26.12854, 40.77339], [26.12495, 40.74283], [26.08638, 40.73214], [26.0754, 40.72772], [26.03489, 40.73051], [25.94795, 40.72797], [26.04292, 40.3958], [25.61285, 40.17161], [25.94257, 39.39358], [26.43357, 39.43096], [26.70773, 39.0312], [26.61814, 38.81372], [26.21136, 38.65436], [26.32173, 38.48731], [26.24183, 38.44695], [26.21136, 38.17558], [27.05537, 37.9131], [27.16428, 37.72343], [26.99377, 37.69034], [26.95583, 37.64989], [27.14757, 37.32], [27.20312, 36.94571], [27.45627, 36.9008], [27.24613, 36.71622], [27.46117, 36.53789], [27.89482, 36.69898], [27.95037, 36.46155], [28.23708, 36.56812], [29.30783, 36.01033], [29.48192, 36.18377], [29.61002, 36.1731], [29.61805, 36.14179], [29.69611, 36.10365], [29.73302, 35.92555], [32.82353, 35.70297], [35.51152, 36.10954], [35.931, 35.92109], [35.98499, 35.94107], [36.00514, 35.94113], [36.01844, 35.92403], [35.99829, 35.88242], [36.11827, 35.85923], [36.13919, 35.83692], [36.14029, 35.81015], [36.1623, 35.80925], [36.17441, 35.92076], [36.19973, 35.95195], [36.25366, 35.96264], [36.27678, 35.94839], [36.29769, 35.96086], [36.28338, 36.00273], [36.30099, 36.00985], [36.33956, 35.98687], [36.37474, 36.01163], [36.39206, 36.22088], [36.4617, 36.20461], [36.50463, 36.2419], [36.6125, 36.22592], [36.68672, 36.23677], [36.65653, 36.33861], [36.6081, 36.33772], [36.54206, 36.49539], [36.58829, 36.58295], [36.57398, 36.65186], [36.62681, 36.71189], [36.61581, 36.74629], [36.66727, 36.82901], [36.99557, 36.75997], [36.99886, 36.74012], [37.04399, 36.73483], [37.04619, 36.71101], [37.01647, 36.69512], [37.02088, 36.66422], [37.08279, 36.63495], [37.10894, 36.6704], [37.16177, 36.66069], [37.21988, 36.6736], [37.47253, 36.63243], [37.49103, 36.66904], [37.68048, 36.75065], [37.81974, 36.76055], [38.21064, 36.91842], [38.38859, 36.90064], [38.55908, 36.84429], [38.74042, 36.70629], [39.03217, 36.70911], [39.21538, 36.66834], [39.81589, 36.75538], [40.69136, 37.0996], [40.90856, 37.13147], [41.21937, 37.07665], [41.515, 37.08084], [42.00894, 37.17209], [42.18225, 37.28569], [42.19301, 37.31323], [42.2112, 37.32491], [42.22257, 37.31395], [42.22381, 37.30238], [42.20454, 37.28715], [42.21548, 37.28026], [42.23683, 37.2863], [42.26039, 37.27017], [42.2824, 37.2798], [42.34735, 37.22548], [42.32313, 37.17814], [42.35724, 37.10998], [42.56725, 37.14878], [42.78887, 37.38615], [42.93705, 37.32015], [43.11403, 37.37436], [43.30083, 37.30629], [43.33508, 37.33105], [43.50787, 37.24436], [43.56702, 37.25675], [43.63085, 37.21957], [43.7009, 37.23692], [43.8052, 37.22825], [43.82699, 37.19477], [43.84878, 37.22205], [43.90949, 37.22453], [44.02002, 37.33229], [44.13521, 37.32486], [44.2613, 37.25055], [44.27998, 37.16501], [44.22239, 37.15756], [44.18503, 37.09551], [44.25975, 36.98119], [44.30645, 36.97373], [44.35937, 37.02843], [44.35315, 37.04955], [44.38117, 37.05825], [44.42631, 37.05825], [44.63179, 37.19229], [44.76698, 37.16162], [44.78319, 37.1431], [44.7868, 37.16644], [44.75986, 37.21549], [44.81021, 37.2915], [44.58449, 37.45018], [44.61401, 37.60165], [44.56887, 37.6429], [44.62096, 37.71985], [44.55498, 37.783], [44.45948, 37.77065], [44.3883, 37.85433], [44.22509, 37.88859], [44.42476, 38.25763], [44.50115, 38.33939], [44.44386, 38.38295], [44.38309, 38.36117], [44.3119, 38.37887], [44.3207, 38.49799], [44.32058, 38.62752], [44.28065, 38.6465], [44.26155, 38.71427], [44.30322, 38.81581], [44.18863, 38.93881], [44.20946, 39.13975], [44.1043, 39.19842], [44.03667, 39.39223], [44.22452, 39.4169], [44.29818, 39.378], [44.37921, 39.4131], [44.42832, 39.4131], [44.41849, 39.56659], [44.48111, 39.61579], [44.47298, 39.68788], [44.6137, 39.78393], [44.65422, 39.72163], [44.71806, 39.71124], [44.81043, 39.62677], [44.80977, 39.65768], [44.75779, 39.7148], [44.61845, 39.8281], [44.46635, 39.97733], [44.26973, 40.04866], [44.1778, 40.02845], [44.1057, 40.03555], [43.92307, 40.01787], [43.65688, 40.11199], [43.65221, 40.14889], [43.71136, 40.16673], [43.59928, 40.34019], [43.60862, 40.43267], [43.54791, 40.47413], [43.63664, 40.54159], [43.7425, 40.66805], [43.74872, 40.7365], [43.67712, 40.84846], [43.67712, 40.93084], [43.58683, 40.98961], [43.47319, 41.02251], [43.44984, 41.0988], [43.4717, 41.12611], [43.44973, 41.17666], [43.36118, 41.2028], [43.23096, 41.17536], [43.1945, 41.25242], [43.13373, 41.25503], [43.21707, 41.30331], [43.02956, 41.37891], [42.8785, 41.50516], [42.84899, 41.47265], [42.78995, 41.50126], [42.84471, 41.58912], [42.72794, 41.59714], [42.59202, 41.58183], [42.51772, 41.43606], [42.26387, 41.49346], [41.95134, 41.52466], [41.81939, 41.43621], [41.7124, 41.47417], [41.7148, 41.4932], [41.54366, 41.52185]]]]
          }
-
-         return index % length;
-       }
-       /**
-        * a replacement for functor
-        *
-        * @param {*} value any value
-        * @returns {Function} a function that returns that value or the value if it's a function
-        */
-
-       function utilFunctor(value) {
-         if (typeof value === 'function') return value;
-         return function () {
-           return value;
-         };
-       }
-       function utilNoAuto(selection) {
-         var isText = selection.size() && selection.node().tagName.toLowerCase() === 'textarea';
-         return selection // assign 'new-password' even for non-password fields to prevent browsers (Chrome) ignoring 'off'
-         .attr('autocomplete', 'new-password').attr('autocorrect', 'off').attr('autocapitalize', 'off').attr('spellcheck', isText ? 'true' : 'false');
-       } // https://stackoverflow.com/questions/194846/is-there-any-kind-of-hash-code-function-in-javascript
-       // https://werxltd.com/wp/2010/05/13/javascript-implementation-of-javas-string-hashcode-method/
-
-       function utilHashcode(str) {
-         var hash = 0;
-
-         if (str.length === 0) {
-           return hash;
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "TT",
+           iso1A3: "TTO",
+           iso1N3: "780",
+           wikidata: "Q754",
+           nameEn: "Trinidad and Tobago",
+           groups: ["029", "003", "419", "019", "UN"],
+           driveSide: "left",
+           callingCodes: ["1 868"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[-61.62505, 11.18974], [-62.08693, 10.04435], [-60.89962, 9.81445], [-60.07172, 11.77667], [-61.62505, 11.18974]]]]
          }
-
-         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
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "TV",
+           iso1A3: "TUV",
+           iso1N3: "798",
+           wikidata: "Q672",
+           nameEn: "Tuvalu",
+           groups: ["061", "009", "UN"],
+           driveSide: "left",
+           callingCodes: ["688"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[174, -5], [174, -11.5], [179.99999, -11.5], [179.99999, -5], [174, -5]]]]
          }
-
-         return hash;
-       } // Returns version of `str` with all runs of special characters replaced by `_`;
-       // suitable for HTML ids, classes, selectors, etc.
-
-       function utilSafeClassName(str) {
-         return str.toLowerCase().replace(/[^a-z0-9]+/g, '_');
-       } // Returns string based on `val` that is highly unlikely to collide with an id
-       // used previously or that's present elsewhere in the document. Useful for preventing
-       // browser-provided autofills or when embedding iD on pages with unknown elements.
-
-       function utilUniqueDomId(val) {
-         return 'ideditor-' + utilSafeClassName(val.toString()) + '-' + new Date().getTime().toString();
-       } // Returns the length of `str` in unicode characters. This can be less than
-       // `String.length()` since a single unicode character can be composed of multiple
-       // JavaScript UTF-16 code units.
-
-       function utilUnicodeCharsCount(str) {
-         // Native ES2015 implementations of `Array.from` split strings into unicode characters
-         return Array.from(str).length;
-       } // Returns a new string representing `str` cut from its start to `limit` length
-       // in unicode characters. Note that this runs the risk of splitting graphemes.
-
-       function utilUnicodeCharsTruncated(str, limit) {
-         return Array.from(str).slice(0, limit).join('');
-       }
-
-       function osmEntity(attrs) {
-         // For prototypal inheritance.
-         if (this instanceof osmEntity) return; // Create the appropriate subtype.
-
-         if (attrs && attrs.type) {
-           return osmEntity[attrs.type].apply(this, arguments);
-         } else if (attrs && attrs.id) {
-           return osmEntity[osmEntity.id.type(attrs.id)].apply(this, arguments);
-         } // Initialize a generic Entity (used only in tests).
-
-
-         return new osmEntity().initialize(arguments);
-       }
-
-       osmEntity.id = function (type) {
-         return osmEntity.id.fromOSM(type, osmEntity.id.next[type]--);
-       };
-
-       osmEntity.id.next = {
-         changeset: -1,
-         node: -1,
-         way: -1,
-         relation: -1
-       };
-
-       osmEntity.id.fromOSM = function (type, id) {
-         return type[0] + id;
-       };
-
-       osmEntity.id.toOSM = function (id) {
-         return id.slice(1);
-       };
-
-       osmEntity.id.type = function (id) {
-         return {
-           'c': 'changeset',
-           'n': 'node',
-           'w': 'way',
-           'r': 'relation'
-         }[id[0]];
-       }; // A function suitable for use as the second argument to d3.selection#data().
-
-
-       osmEntity.key = function (entity) {
-         return entity.id + 'v' + (entity.v || 0);
-       };
-
-       var _deprecatedTagValuesByKey;
-
-       osmEntity.deprecatedTagValuesByKey = function (dataDeprecated) {
-         if (!_deprecatedTagValuesByKey) {
-           _deprecatedTagValuesByKey = {};
-           dataDeprecated.forEach(function (d) {
-             var oldKeys = Object.keys(d.old);
-
-             if (oldKeys.length === 1) {
-               var oldKey = oldKeys[0];
-               var oldValue = d.old[oldKey];
-
-               if (oldValue !== '*') {
-                 if (!_deprecatedTagValuesByKey[oldKey]) {
-                   _deprecatedTagValuesByKey[oldKey] = [oldValue];
-                 } else {
-                   _deprecatedTagValuesByKey[oldKey].push(oldValue);
-                 }
-               }
-             }
-           });
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "TW",
+           iso1A3: "TWN",
+           iso1N3: "158",
+           wikidata: "Q865",
+           nameEn: "Taiwan",
+           aliases: ["RC"],
+           groups: ["030", "142"],
+           callingCodes: ["886"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[121.8109, 21.77688], [122.26612, 25.98197], [120.49232, 25.22863], [118.56434, 24.49266], [118.42453, 24.54644], [118.35291, 24.51645], [118.28244, 24.51231], [118.11703, 24.39734], [120.69238, 21.52331], [121.8109, 21.77688]]]]
          }
-
-         return _deprecatedTagValuesByKey;
-       };
-
-       osmEntity.prototype = {
-         tags: {},
-         initialize: function initialize(sources) {
-           for (var i = 0; i < sources.length; ++i) {
-             var source = sources[i];
-
-             for (var prop in source) {
-               if (Object.prototype.hasOwnProperty.call(source, prop)) {
-                 if (source[prop] === undefined) {
-                   delete this[prop];
-                 } else {
-                   this[prop] = source[prop];
-                 }
-               }
-             }
-           }
-
-           if (!this.id && this.type) {
-             this.id = osmEntity.id(this.type);
-           }
-
-           if (!this.hasOwnProperty('visible')) {
-             this.visible = true;
-           }
-
-           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 changed = false;
-
-           for (var k in tags) {
-             var t1 = merged[k];
-             var t2 = tags[k];
-
-             if (!t1) {
-               changed = true;
-               merged[k] = t2;
-             } else if (t1 !== t2) {
-               changed = true;
-               merged[k] = utilUnicodeCharsTruncated(utilArrayUnion(t1.split(/;\s*/), t2.split(/;\s*/)).join(';'), 255 // avoid exceeding character limit; see also services/osm.js -> maxCharsForTagValue()
-               );
-             }
-           }
-
-           return changed ? this.update({
-             tags: merged
-           }) : this;
-         },
-         intersects: function 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);
-
-             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
-
-               if (hasExistingValues) return;
-             }
-
-             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;
-                   }
-                 }
-               }
-
-               return false;
-             });
-
-             if (matchesDeprecatedTags) {
-               deprecated.push(d);
-             }
-           });
-           return deprecated;
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "TZ",
+           iso1A3: "TZA",
+           iso1N3: "834",
+           wikidata: "Q924",
+           nameEn: "Tanzania",
+           groups: ["014", "202", "002", "UN"],
+           driveSide: "left",
+           callingCodes: ["255"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[30.80408, -0.99911], [30.76635, -0.9852], [30.70631, -1.01175], [30.64166, -1.06601], [30.47194, -1.0555], [30.45116, -1.10641], [30.50889, -1.16412], [30.57123, -1.33264], [30.71974, -1.43244], [30.84079, -1.64652], [30.80802, -1.91477], [30.89303, -2.08223], [30.83915, -2.35795], [30.54501, -2.41404], [30.41789, -2.66266], [30.52747, -2.65841], [30.40662, -2.86151], [30.4987, -2.9573], [30.57926, -2.89791], [30.6675, -2.98987], [30.83823, -2.97837], [30.84165, -3.25152], [30.45915, -3.56532], [30.22042, -4.01738], [30.03323, -4.26631], [29.88172, -4.35743], [29.82885, -4.36153], [29.77289, -4.41733], [29.75109, -4.45836], [29.63827, -4.44681], [29.43673, -4.44845], [29.52552, -6.2731], [30.2567, -7.14121], [30.79243, -8.27382], [31.00796, -8.58615], [31.37533, -8.60769], [31.57147, -8.70619], [31.57147, -8.81388], [31.71158, -8.91386], [31.81587, -8.88618], [31.94663, -8.93846], [31.94196, -9.02303], [31.98866, -9.07069], [32.08206, -9.04609], [32.16146, -9.05993], [32.25486, -9.13371], [32.43543, -9.11988], [32.49147, -9.14754], [32.53661, -9.24281], [32.75611, -9.28583], [32.76233, -9.31963], [32.95389, -9.40138], [32.99397, -9.36712], [33.14925, -9.49322], [33.31581, -9.48554], [33.48052, -9.62442], [33.76677, -9.58516], [33.93298, -9.71647], [33.9638, -9.62206], [33.95829, -9.54066], [34.03865, -9.49398], [34.54499, -10.0678], [34.51911, -10.12279], [34.57581, -10.56271], [34.65946, -10.6828], [34.67047, -10.93796], [34.61161, -11.01611], [34.63305, -11.11731], [34.79375, -11.32245], [34.91153, -11.39799], [34.96296, -11.57354], [35.63599, -11.55927], [35.82767, -11.41081], [36.19094, -11.57593], [36.19094, -11.70008], [36.62068, -11.72884], [36.80309, -11.56836], [37.3936, -11.68949], [37.76614, -11.53352], [37.8388, -11.3123], [37.93618, -11.26228], [38.21598, -11.27289], [38.47258, -11.4199], [38.88996, -11.16978], [39.24395, -11.17433], [39.58249, -10.96043], [40.00295, -10.80255], [40.44265, -10.4618], [40.74206, -10.25691], [40.14328, -4.64201], [39.62121, -4.68136], [39.44306, -4.93877], [39.21631, -4.67835], [37.81321, -3.69179], [37.75036, -3.54243], [37.63099, -3.50723], [37.5903, -3.42735], [37.71745, -3.304], [37.67199, -3.06222], [34.0824, -1.02264], [34.03084, -1.05101], [34.02286, -1.00779], [33.93107, -0.99298], [30.80408, -0.99911]]]]
          }
-       };
-
-       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;
-           }
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "UA",
+           iso1A3: "UKR",
+           iso1N3: "804",
+           wikidata: "Q212",
+           nameEn: "Ukraine",
+           groups: ["151", "150", "UN"],
+           callingCodes: ["380"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[33.57318, 46.10317], [33.61467, 46.13561], [33.63854, 46.14147], [33.61517, 46.22615], [33.646, 46.23028], [33.74047, 46.18555], [33.79715, 46.20482], [33.85234, 46.19863], [33.91549, 46.15938], [34.05272, 46.10838], [34.07311, 46.11769], [34.12929, 46.10494], [34.181, 46.06804], [34.25111, 46.0532], [34.33912, 46.06114], [34.41221, 46.00245], [34.44155, 45.95995], [34.48729, 45.94267], [34.52011, 45.95097], [34.55889, 45.99347], [34.60861, 45.99347], [34.66679, 45.97136], [34.75479, 45.90705], [34.80153, 45.90047], [34.79905, 45.81009], [34.96015, 45.75634], [35.23066, 45.79231], [37.62608, 46.82615], [38.12112, 46.86078], [38.3384, 46.98085], [38.22955, 47.12069], [38.23049, 47.2324], [38.32112, 47.2585], [38.33074, 47.30508], [38.22225, 47.30788], [38.28954, 47.39255], [38.28679, 47.53552], [38.35062, 47.61631], [38.76379, 47.69346], [38.79628, 47.81109], [38.87979, 47.87719], [39.73935, 47.82876], [39.82213, 47.96396], [39.77544, 48.04206], [39.88256, 48.04482], [39.83724, 48.06501], [39.94847, 48.22811], [40.00752, 48.22445], [39.99241, 48.31768], [39.97325, 48.31399], [39.9693, 48.29904], [39.95248, 48.29972], [39.91465, 48.26743], [39.90041, 48.3049], [39.84273, 48.30947], [39.84136, 48.33321], [39.94847, 48.35055], [39.88794, 48.44226], [39.86196, 48.46633], [39.84548, 48.57821], [39.79764, 48.58668], [39.67226, 48.59368], [39.71765, 48.68673], [39.73104, 48.7325], [39.79466, 48.83739], [39.97182, 48.79398], [40.08168, 48.87443], [40.03636, 48.91957], [39.98967, 48.86901], [39.78368, 48.91596], [39.74874, 48.98675], [39.72649, 48.9754], [39.71353, 48.98959], [39.6683, 48.99454], [39.6836, 49.05121], [39.93437, 49.05709], [40.01988, 49.1761], [40.22176, 49.25683], [40.18331, 49.34996], [40.14912, 49.37681], [40.1141, 49.38798], [40.03087, 49.45452], [40.03636, 49.52321], [40.16683, 49.56865], [40.13249, 49.61672], [39.84548, 49.56064], [39.65047, 49.61761], [39.59142, 49.73758], [39.44496, 49.76067], [39.27968, 49.75976], [39.1808, 49.88911], [38.9391, 49.79524], [38.90477, 49.86787], [38.73311, 49.90238], [38.68677, 50.00904], [38.65688, 49.97176], [38.35408, 50.00664], [38.32524, 50.08866], [38.18517, 50.08161], [38.21675, 49.98104], [38.02999, 49.90592], [38.02999, 49.94482], [37.90776, 50.04194], [37.79515, 50.08425], [37.75807, 50.07896], [37.61113, 50.21976], [37.62879, 50.24481], [37.62486, 50.29966], [37.47243, 50.36277], [37.48204, 50.46079], [37.08468, 50.34935], [36.91762, 50.34963], [36.69377, 50.26982], [36.64571, 50.218], [36.56655, 50.2413], [36.58371, 50.28563], [36.47817, 50.31457], [36.30101, 50.29088], [36.20763, 50.3943], [36.06893, 50.45205], [35.8926, 50.43829], [35.80388, 50.41356], [35.73659, 50.35489], [35.61711, 50.35707], [35.58003, 50.45117], [35.47463, 50.49247], [35.39464, 50.64751], [35.48116, 50.66405], [35.47704, 50.77274], [35.41367, 50.80227], [35.39307, 50.92145], [35.32598, 50.94524], [35.40837, 51.04119], [35.31774, 51.08434], [35.20375, 51.04723], [35.12685, 51.16191], [35.14058, 51.23162], [34.97304, 51.2342], [34.82472, 51.17483], [34.6874, 51.18], [34.6613, 51.25053], [34.38802, 51.2746], [34.31661, 51.23936], [34.23009, 51.26429], [34.33446, 51.363], [34.22048, 51.4187], [34.30562, 51.5205], [34.17599, 51.63253], [34.07765, 51.67065], [34.42922, 51.72852], [34.41136, 51.82793], [34.09413, 52.00835], [34.11199, 52.14087], [34.05239, 52.20132], [33.78789, 52.37204], [33.55718, 52.30324], [33.48027, 52.31499], [33.51323, 52.35779], [33.18913, 52.3754], [32.89937, 52.2461], [32.85405, 52.27888], [32.69475, 52.25535], [32.54781, 52.32423], [32.3528, 52.32842], [32.38988, 52.24946], [32.33083, 52.23685], [32.34044, 52.1434], [32.2777, 52.10266], [32.23331, 52.08085], [32.08813, 52.03319], [31.92159, 52.05144], [31.96141, 52.08015], [31.85018, 52.11305], [31.81722, 52.09955], [31.7822, 52.11406], [31.38326, 52.12991], [31.25142, 52.04131], [31.13332, 52.1004], [30.95589, 52.07775], [30.90897, 52.00699], [30.76443, 51.89739], [30.68804, 51.82806], [30.51946, 51.59649], [30.64992, 51.35014], [30.56203, 51.25655], [30.36153, 51.33984], [30.34642, 51.42555], [30.17888, 51.51025], [29.77376, 51.4461], [29.7408, 51.53417], [29.54372, 51.48372], [29.49773, 51.39814], [29.42357, 51.4187], [29.32881, 51.37843], [29.25191, 51.49828], [29.25603, 51.57089], [29.20659, 51.56918], [29.16402, 51.64679], [29.1187, 51.65872], [28.99098, 51.56833], [28.95528, 51.59222], [28.81795, 51.55552], [28.76027, 51.48802], [28.78224, 51.45294], [28.75615, 51.41442], [28.73143, 51.46236], [28.69161, 51.44695], [28.64429, 51.5664], [28.47051, 51.59734], [28.37592, 51.54505], [28.23452, 51.66988], [28.10658, 51.57857], [27.95827, 51.56065], [27.91844, 51.61952], [27.85253, 51.62293], [27.76052, 51.47604], [27.67125, 51.50854], [27.71932, 51.60672], [27.55727, 51.63486], [27.51058, 51.5854], [27.47212, 51.61184], [27.24828, 51.60161], [27.26613, 51.65957], [27.20948, 51.66713], [27.20602, 51.77291], [26.99422, 51.76933], [26.9489, 51.73788], [26.80043, 51.75777], [26.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          }
-
-         switch (tags.highway) {
-           case 'trunk':
-           case 'motorway':
-             count = isOneWay ? 2 : 4;
-             break;
-
-           default:
-             count = isOneWay ? 1 : 2;
-             break;
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "UG",
+           iso1A3: "UGA",
+           iso1N3: "800",
+           wikidata: "Q1036",
+           nameEn: "Uganda",
+           groups: ["014", "202", "002", "UN"],
+           driveSide: "left",
+           callingCodes: ["256"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[33.93107, -0.99298], [33.9264, -0.54188], [33.98449, -0.13079], [33.90936, 0.10581], [34.10067, 0.36372], [34.08727, 0.44713], [34.11408, 0.48884], [34.13493, 0.58118], [34.20196, 0.62289], [34.27345, 0.63182], [34.31516, 0.75693], [34.40041, 0.80266], [34.43349, 0.85254], [34.52369, 1.10692], [34.57427, 1.09868], [34.58029, 1.14712], [34.67562, 1.21265], [34.80223, 1.22754], [34.82606, 1.26626], [34.82606, 1.30944], [34.7918, 1.36752], [34.87819, 1.5596], [34.92734, 1.56109], [34.9899, 1.6668], [34.98692, 1.97348], [34.90947, 2.42447], [34.95267, 2.47209], [34.77244, 2.70272], [34.78137, 2.76223], [34.73967, 2.85447], [34.65774, 2.8753], [34.60114, 2.93034], [34.56242, 3.11478], [34.45815, 3.18319], [34.40006, 3.37949], [34.41794, 3.44342], [34.39112, 3.48802], [34.44922, 3.51627], [34.45815, 3.67385], [34.15429, 3.80464], [34.06046, 4.15235], [33.9873, 4.23316], [33.51264, 3.75068], [33.18356, 3.77812], [33.02852, 3.89296], [32.89746, 3.81339], [32.72021, 3.77327], [32.41337, 3.748], [32.20782, 3.6053], [32.19888, 3.50867], [32.08866, 3.53543], [32.08491, 3.56287], [32.05187, 3.589], [31.95907, 3.57408], [31.96205, 3.6499], [31.86821, 3.78664], [31.81459, 3.82083], [31.72075, 3.74354], [31.50776, 3.63652], [31.50478, 3.67814], [31.29476, 3.8015], [31.16666, 3.79853], [30.97601, 3.693], [30.85153, 3.48867], [30.94081, 3.50847], [30.93486, 3.40737], [30.84251, 3.26908], [30.77101, 3.04897], [30.8574, 2.9508], [30.8857, 2.83923], [30.75612, 2.5863], [30.74271, 2.43601], [30.83059, 2.42559], [30.91102, 2.33332], [30.96911, 2.41071], [31.06593, 2.35862], [31.07934, 2.30207], [31.12104, 2.27676], [31.1985, 2.29462], [31.20148, 2.2217], [31.28042, 2.17853], [31.30127, 2.11006], [30.48503, 1.21675], [30.24671, 1.14974], [30.22139, 0.99635], [30.1484, 0.89805], [29.98307, 0.84295], [29.95477, 0.64486], [29.97413, 0.52124], [29.87284, 0.39166], [29.81922, 0.16824], [29.77454, 0.16675], [29.7224, 0.07291], [29.72687, -0.08051], [29.65091, -0.46777], [29.67474, -0.47969], [29.67176, -0.55714], [29.62708, -0.71055], [29.63006, -0.8997], [29.58388, -0.89821], [29.59061, -1.39016], [29.82657, -1.31187], [29.912, -1.48269], [30.16369, -1.34303], [30.35212, -1.06896], [30.47194, -1.0555], [30.64166, -1.06601], [30.70631, -1.01175], [30.76635, -0.9852], [30.80408, -0.99911], [33.93107, -0.99298]]]]
          }
-
-         return count;
-       }
-
-       function parseMaxspeed(tags) {
-         var maxspeed = tags.maxspeed;
-         if (!maxspeed) return;
-         var maxspeedRegex = /^([0-9][\.0-9]+?)(?:[ ]?(?:km\/h|kmh|kph|mph|knots))?$/;
-         if (!maxspeedRegex.test(maxspeed)) return;
-         return parseInt(maxspeed, 10);
-       }
-
-       function parseLaneDirections(tags, isOneWay, laneCount) {
-         var forward = parseInt(tags['lanes:forward'], 10);
-         var backward = parseInt(tags['lanes:backward'], 10);
-         var bothways = parseInt(tags['lanes:both_ways'], 10) > 0 ? 1 : 0;
-
-         if (parseInt(tags.oneway, 10) === -1) {
-           forward = 0;
-           bothways = 0;
-           backward = laneCount;
-         } else if (isOneWay) {
-           forward = laneCount;
-           bothways = 0;
-           backward = 0;
-         } else if (isNaN(forward) && isNaN(backward)) {
-           backward = Math.floor((laneCount - bothways) / 2);
-           forward = laneCount - bothways - backward;
-         } else if (isNaN(forward)) {
-           if (backward > laneCount - bothways) {
-             backward = laneCount - bothways;
-           }
-
-           forward = laneCount - bothways - backward;
-         } else if (isNaN(backward)) {
-           if (forward > laneCount - bothways) {
-             forward = laneCount - bothways;
-           }
-
-           backward = laneCount - bothways - forward;
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "UM",
+           iso1A3: "UMI",
+           iso1N3: "581",
+           wikidata: "Q16645",
+           nameEn: "United States Minor Outlying Islands",
+           country: "US"
+         },
+         geometry: null
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "UN",
+           wikidata: "Q1065",
+           nameEn: "United Nations",
+           level: "unitedNations",
+           isoStatus: "excRes"
+         },
+         geometry: null
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "US",
+           iso1A3: "USA",
+           iso1N3: "840",
+           wikidata: "Q30",
+           nameEn: "United States of America"
+         },
+         geometry: null
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "UY",
+           iso1A3: "URY",
+           iso1N3: "858",
+           wikidata: "Q77",
+           nameEn: "Uruguay",
+           groups: ["005", "419", "019", "UN"],
+           callingCodes: ["598"]
+         },
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+         }
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "UZ",
+           iso1A3: "UZB",
+           iso1N3: "860",
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+           nameEn: "Uzbekistan",
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+           callingCodes: ["998"]
+         },
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+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[-71.22331, 13.01387], [-70.92579, 11.96275], [-71.3275, 11.85], [-71.9675, 11.65536], [-72.24983, 11.14138], [-72.4767, 11.1117], [-72.88002, 10.44309], [-72.98085, 9.85253], [-73.36905, 9.16636], [-73.02119, 9.27584], [-72.94052, 9.10663], [-72.77415, 9.10165], [-72.65474, 8.61428], [-72.4042, 8.36513], [-72.36987, 8.19976], [-72.35163, 8.01163], [-72.39137, 8.03534], [-72.47213, 7.96106], [-72.48801, 7.94329], [-72.48183, 7.92909], [-72.47042, 7.92306], [-72.45806, 7.91141], [-72.46183, 7.90682], [-72.44454, 7.86031], [-72.46763, 7.79518], [-72.47827, 7.65604], [-72.45321, 7.57232], [-72.47415, 7.48928], [-72.43132, 7.40034], [-72.19437, 7.37034], [-72.04895, 7.03837], [-71.82441, 7.04314], [-71.44118, 7.02116], [-71.42212, 7.03854], [-71.37234, 7.01588], [-71.03941, 6.98163], [-70.7596, 7.09799], [-70.10716, 6.96516], [-69.41843, 6.1072], [-67.60654, 6.2891], [-67.4625, 6.20625], [-67.43513, 5.98835], [-67.58558, 5.84537], [-67.63914, 5.64963], [-67.59141, 5.5369], [-67.83341, 5.31104], [-67.85358, 4.53249], [-67.62671, 3.74303], [-67.50067, 3.75812], [-67.30945, 3.38393], [-67.85862, 2.86727], [-67.85862, 2.79173], [-67.65696, 2.81691], [-67.21967, 2.35778], [-66.85795, 1.22998], [-66.28507, 0.74585], [-65.6727, 1.01353], [-65.50158, 0.92086], [-65.57288, 0.62856], [-65.11657, 1.12046], [-64.38932, 1.5125], [-64.34654, 1.35569], [-64.08274, 1.64792], [-64.06135, 1.94722], [-63.39827, 2.16098], [-63.39114, 2.4317], [-64.0257, 2.48156], [-64.02908, 2.79797], [-64.48379, 3.7879], [-64.84028, 4.24665], [-64.72977, 4.28931], [-64.57648, 4.12576], [-64.14512, 4.12932], [-63.99183, 3.90172], [-63.86082, 3.94796], [-63.70218, 3.91417], [-63.67099, 4.01731], [-63.50611, 3.83592], [-63.42233, 3.89995], [-63.4464, 3.9693], [-63.21111, 3.96219], [-62.98296, 3.59935], [-62.7655, 3.73099], [-62.74411, 4.03331], [-62.57656, 4.04754], [-62.44822, 4.18621], [-62.13094, 4.08309], [-61.54629, 4.2822], [-61.48569, 4.43149], [-61.29675, 4.44216], [-61.31457, 4.54167], [-61.15703, 4.49839], [-60.98303, 4.54167], [-60.86539, 4.70512], [-60.5802, 4.94312], [-60.73204, 5.20931], [-61.4041, 5.95304], [-61.15058, 6.19558], [-61.20762, 6.58174], [-61.13632, 6.70922], [-60.54873, 6.8631], [-60.39419, 6.94847], [-60.28074, 7.1162], [-60.44116, 7.20817], [-60.54098, 7.14804], [-60.63367, 7.25061], [-60.59802, 7.33194], [-60.71923, 7.55817], [-60.64793, 7.56877], [-60.51959, 7.83373], [-60.38056, 7.8302], [-60.02407, 8.04557], [-59.97059, 8.20791], [-59.83156, 8.23261], [-59.80661, 8.28906], [-59.85562, 8.35213], [-59.98508, 8.53046], [-59.54058, 8.6862], [-60.89962, 9.81445], [-62.08693, 10.04435], [-61.62505, 11.18974], [-63.73917, 11.92623], [-63.19938, 16.44103], [-67.89186, 12.4116], [-68.01417, 11.77722], [-68.33524, 11.78151], [-68.99639, 11.79035], [-71.22331, 13.01387]]]]
          }
-
-         return {
-           forward: forward,
-           backward: backward,
-           bothways: bothways
-         };
-       }
-
-       function parseTurnLanes(tag) {
-         if (!tag) return;
-         var validValues = ['left', 'slight_left', 'sharp_left', 'through', 'right', 'slight_right', 'sharp_right', 'reverse', 'merge_to_left', 'merge_to_right', 'none'];
-         return tag.split('|').map(function (s) {
-           if (s === '') s = 'none';
-           return s.split(';').map(function (d) {
-             return validValues.indexOf(d) === -1 ? 'unknown' : d;
-           });
-         });
-       }
-
-       function parseMaxspeedLanes(tag, maxspeed) {
-         if (!tag) return;
-         return tag.split('|').map(function (s) {
-           if (s === 'none') return s;
-           var m = parseInt(s, 10);
-           if (s === '' || m === maxspeed) return null;
-           return isNaN(m) ? 'unknown' : m;
-         });
-       }
-
-       function parseMiscLanes(tag) {
-         if (!tag) return;
-         var validValues = ['yes', 'no', 'designated'];
-         return tag.split('|').map(function (s) {
-           if (s === '') s = 'no';
-           return validValues.indexOf(s) === -1 ? 'unknown' : s;
-         });
-       }
-
-       function parseBicycleWay(tag) {
-         if (!tag) return;
-         var validValues = ['yes', 'no', 'designated', 'lane'];
-         return tag.split('|').map(function (s) {
-           if (s === '') s = 'no';
-           return validValues.indexOf(s) === -1 ? 'unknown' : s;
-         });
-       }
-
-       function mapToLanesObj(lanesObj, data, key) {
-         if (data.forward) data.forward.forEach(function (l, i) {
-           if (!lanesObj.forward[i]) lanesObj.forward[i] = {};
-           lanesObj.forward[i][key] = l;
-         });
-         if (data.backward) data.backward.forEach(function (l, i) {
-           if (!lanesObj.backward[i]) lanesObj.backward[i] = {};
-           lanesObj.backward[i][key] = l;
-         });
-         if (data.unspecified) data.unspecified.forEach(function (l, i) {
-           if (!lanesObj.unspecified[i]) lanesObj.unspecified[i] = {};
-           lanesObj.unspecified[i][key] = l;
-         });
-       }
-
-       function osmWay() {
-         if (!(this instanceof osmWay)) {
-           return new osmWay().initialize(arguments);
-         } else if (arguments.length) {
-           this.initialize(arguments);
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "VG",
+           iso1A3: "VGB",
+           iso1N3: "092",
+           wikidata: "Q25305",
+           nameEn: "British Virgin Islands",
+           country: "GB",
+           groups: ["BOTS", "029", "003", "419", "019", "UN"],
+           driveSide: "left",
+           roadSpeedUnit: "mph",
+           roadHeightUnit: "ft",
+           callingCodes: ["1 284"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[-64.47127, 17.55688], [-63.88746, 19.15706], [-65.02435, 18.73231], [-64.86027, 18.39056], [-64.64673, 18.36549], [-64.47127, 17.55688]]]]
          }
-       }
-       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();
-
-             for (var i = 0; i < this.nodes.length; i++) {
-               var node = resolver.hasEntity(this.nodes[i]);
-
-               if (node) {
-                 extent._extend(node.extent());
-               }
-             }
-
-             return extent;
-           });
-         },
-         first: function first() {
-           return this.nodes[0];
-         },
-         last: function last() {
-           return this.nodes[this.nodes.length - 1];
-         },
-         contains: function contains(node) {
-           return this.nodes.indexOf(node) >= 0;
-         },
-         affix: function affix(node) {
-           if (this.nodes[0] === node) return 'prefix';
-           if (this.nodes[this.nodes.length - 1] === node) return 'suffix';
-         },
-         layer: function layer() {
-           // explicit layer tag, clamp between -10, 10..
-           if (isFinite(this.tags.layer)) {
-             return Math.max(-10, Math.min(+this.tags.layer, 10));
-           } // implied layer tag..
-
-
-           if (this.tags.covered === 'yes') return -1;
-           if (this.tags.location === 'overground') return 1;
-           if (this.tags.location === 'underground') return -1;
-           if (this.tags.location === 'underwater') return -10;
-           if (this.tags.power === 'line') return 10;
-           if (this.tags.power === 'minor_line') return 10;
-           if (this.tags.aerialway) return 10;
-           if (this.tags.bridge) return 1;
-           if (this.tags.cutting) return -1;
-           if (this.tags.tunnel) return -1;
-           if (this.tags.waterway) return -1;
-           if (this.tags.man_made === 'pipeline') return -10;
-           if (this.tags.boundary) return -10;
-           return 0;
-         },
-         // the approximate width of the line based on its tags except its `width` tag
-         impliedLineWidthMeters: function impliedLineWidthMeters() {
-           var averageWidths = {
-             highway: {
-               // width is for single lane
-               motorway: 5,
-               motorway_link: 5,
-               trunk: 4.5,
-               trunk_link: 4.5,
-               primary: 4,
-               secondary: 4,
-               tertiary: 4,
-               primary_link: 4,
-               secondary_link: 4,
-               tertiary_link: 4,
-               unclassified: 4,
-               road: 4,
-               living_street: 4,
-               bus_guideway: 4,
-               pedestrian: 4,
-               residential: 3.5,
-               service: 3.5,
-               track: 3,
-               cycleway: 2.5,
-               bridleway: 2,
-               corridor: 2,
-               steps: 2,
-               path: 1.5,
-               footway: 1.5
-             },
-             railway: {
-               // width includes ties and rail bed, not just track gauge
-               rail: 2.5,
-               light_rail: 2.5,
-               tram: 2.5,
-               subway: 2.5,
-               monorail: 2.5,
-               funicular: 2.5,
-               disused: 2.5,
-               preserved: 2.5,
-               miniature: 1.5,
-               narrow_gauge: 1.5
-             },
-             waterway: {
-               river: 50,
-               canal: 25,
-               stream: 5,
-               tidal_channel: 5,
-               fish_pass: 2.5,
-               drain: 2.5,
-               ditch: 1.5
-             }
-           };
-
-           for (var key in averageWidths) {
-             if (this.tags[key] && averageWidths[key][this.tags[key]]) {
-               var width = averageWidths[key][this.tags[key]];
-
-               if (key === 'highway') {
-                 var laneCount = this.tags.lanes && parseInt(this.tags.lanes, 10);
-                 if (!laneCount) laneCount = this.isOneWay() ? 1 : 2;
-                 return width * laneCount;
-               }
-
-               return width;
-             }
-           }
-
-           return null;
-         },
-         isOneWay: function isOneWay() {
-           // explicit oneway tag..
-           var values = {
-             'yes': true,
-             '1': true,
-             '-1': true,
-             'reversible': true,
-             'alternating': true,
-             'no': false,
-             '0': false
-           };
-
-           if (values[this.tags.oneway] !== undefined) {
-             return values[this.tags.oneway];
-           } // implied oneway tag..
-
-
-           for (var key in this.tags) {
-             if (key in osmOneWayTags && this.tags[key] in osmOneWayTags[key]) return true;
-           }
-
-           return false;
-         },
-         // Some identifier for tag that implies that this way is "sided",
-         // i.e. the right side is the 'inside' (e.g. the right side of a
-         // natural=cliff is lower).
-         sidednessIdentifier: function sidednessIdentifier() {
-           for (var key in this.tags) {
-             var value = this.tags[key];
-
-             if (key in osmRightSideIsInsideTags && value in osmRightSideIsInsideTags[key]) {
-               if (osmRightSideIsInsideTags[key][value] === true) {
-                 return key;
-               } else {
-                 // if the map's value is something other than a
-                 // literal true, we should use it so we can
-                 // special case some keys (e.g. natural=coastline
-                 // is handled differently to other naturals).
-                 return osmRightSideIsInsideTags[key][value];
-               }
-             }
-           }
-
-           return null;
-         },
-         isSided: function isSided() {
-           if (this.tags.two_sided === 'yes') {
-             return false;
-           }
-
-           return this.sidednessIdentifier() !== null;
-         },
-         lanes: function lanes() {
-           return osmLanes(this);
-         },
-         isClosed: function isClosed() {
-           return this.nodes.length > 1 && this.first() === this.last();
-         },
-         isConvex: function isConvex(resolver) {
-           if (!this.isClosed() || this.isDegenerate()) return null;
-           var nodes = utilArrayUniq(resolver.childNodes(this));
-           var coords = nodes.map(function (n) {
-             return n.loc;
-           });
-           var curr = 0;
-           var prev = 0;
-
-           for (var i = 0; i < coords.length; i++) {
-             var o = coords[(i + 1) % coords.length];
-             var a = coords[i];
-             var b = coords[(i + 2) % coords.length];
-             var res = geoVecCross(a, b, o);
-             curr = res > 0 ? 1 : res < 0 ? -1 : 0;
-
-             if (curr === 0) {
-               continue;
-             } else if (prev && curr !== prev) {
-               return false;
-             }
-
-             prev = curr;
-           }
-
-           return true;
-         },
-         // returns an object with the tag that implies this is an area, if any
-         tagSuggestingArea: function 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])]]);
-           }
-
-           return graph["transient"](this, 'segments', function () {
-             var segments = [];
-
-             for (var i = 0; i < this.nodes.length - 1; i++) {
-               segments.push({
-                 id: this.id + '-' + i,
-                 wayId: this.id,
-                 index: i,
-                 nodes: [this.nodes[i], this.nodes[i + 1]],
-                 extent: segmentExtent
-               });
-             }
-
-             return segments;
-           });
-         },
-         // If this way is not closed, append the beginning node to the end of the nodelist to close it.
-         close: function close() {
-           if (this.isClosed() || !this.nodes.length) return this;
-           var nodes = this.nodes.slice();
-           nodes = nodes.filter(noRepeatNodes);
-           nodes.push(nodes[0]);
-           return this.update({
-             nodes: nodes
-           });
-         },
-         // If this way is closed, remove any connector nodes from the end of the nodelist to unclose it.
-         unclose: function unclose() {
-           if (!this.isClosed()) return this;
-           var nodes = this.nodes.slice();
-           var connector = this.first();
-           var i = nodes.length - 1; // remove trailing connectors..
-
-           while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
-             nodes.splice(i, 1);
-             i = nodes.length - 1;
-           }
-
-           nodes = nodes.filter(noRepeatNodes);
-           return this.update({
-             nodes: nodes
-           });
-         },
-         // Adds a node (id) in front of the node which is currently at position index.
-         // If index is undefined, the node will be added to the end of the way for linear ways,
-         //   or just before the final connecting node for circular ways.
-         // Consecutive duplicates are eliminated including existing ones.
-         // Circularity is always preserved when adding a node.
-         addNode: function addNode(id, index) {
-           var nodes = this.nodes.slice();
-           var isClosed = this.isClosed();
-           var max = isClosed ? nodes.length - 1 : nodes.length;
-
-           if (index === undefined) {
-             index = max;
-           }
-
-           if (index < 0 || index > max) {
-             throw new RangeError('index ' + index + ' out of range 0..' + max);
-           } // If this is a closed way, remove all connector nodes except the first one
-           // (there may be duplicates) and adjust index if necessary..
-
-
-           if (isClosed) {
-             var connector = this.first(); // leading connectors..
-
-             var i = 1;
-
-             while (i < nodes.length && nodes.length > 2 && nodes[i] === connector) {
-               nodes.splice(i, 1);
-               if (index > i) index--;
-             } // trailing connectors..
-
-
-             i = nodes.length - 1;
-
-             while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
-               nodes.splice(i, 1);
-               if (index > i) index--;
-               i = nodes.length - 1;
-             }
-           }
-
-           nodes.splice(index, 0, id);
-           nodes = nodes.filter(noRepeatNodes); // If the way was closed before, append a connector node to keep it closed..
-
-           if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
-             nodes.push(nodes[0]);
-           }
-
-           return this.update({
-             nodes: nodes
-           });
-         },
-         // Replaces the node which is currently at position index with the given node (id).
-         // Consecutive duplicates are eliminated including existing ones.
-         // Circularity is preserved when updating a node.
-         updateNode: function 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..
-
-
-             i = nodes.length - 1;
-
-             while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
-               nodes.splice(i, 1);
-               if (index === i) index = 0; // update leading connector instead
-
-               i = nodes.length - 1;
-             }
-           }
-
-           nodes.splice(index, 1, id);
-           nodes = nodes.filter(noRepeatNodes); // If the way was closed before, append a connector node to keep it closed..
-
-           if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
-             nodes.push(nodes[0]);
-           }
-
-           return this.update({
-             nodes: nodes
-           });
-         },
-         // Replaces each occurrence of node id needle with replacement.
-         // Consecutive duplicates are eliminated including existing ones.
-         // Circularity is preserved.
-         replaceNode: function 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;
-             }
-           }
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "VI",
+           iso1A3: "VIR",
+           iso1N3: "850",
+           wikidata: "Q11703",
+           nameEn: "United States Virgin Islands",
+           aliases: ["US-VI"],
+           country: "US",
+           groups: ["Q1352230", "029", "003", "419", "019", "UN"],
+           driveSide: "left",
+           roadSpeedUnit: "mph",
+           roadHeightUnit: "ft",
+           callingCodes: ["1 340"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[-65.02435, 18.73231], [-65.27974, 17.56928], [-64.47127, 17.55688], [-64.64673, 18.36549], [-64.86027, 18.39056], [-65.02435, 18.73231]]]]
+         }
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "VN",
+           iso1A3: "VNM",
+           iso1N3: "704",
+           wikidata: "Q881",
+           nameEn: "Vietnam",
+           groups: ["035", "142", "UN"],
+           callingCodes: ["84"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[108.10003, 21.47338], [108.0569, 21.53604], [108.02926, 21.54997], [107.97932, 21.54503], [107.97383, 21.53961], [107.97074, 21.54072], [107.96774, 21.53601], [107.95232, 21.5388], [107.92652, 21.58906], [107.90006, 21.5905], [107.86114, 21.65128], [107.80355, 21.66141], [107.66967, 21.60787], [107.56537, 21.61945], [107.54047, 21.5934], [107.49065, 21.59774], [107.49532, 21.62958], [107.47197, 21.6672], [107.41593, 21.64839], [107.38636, 21.59774], [107.35989, 21.60063], [107.35834, 21.6672], [107.29296, 21.74674], [107.24625, 21.7077], [107.20734, 21.71493], [107.10771, 21.79879], [107.02615, 21.81981], [107.00964, 21.85948], [107.06101, 21.88982], [107.05634, 21.92303], [106.99252, 21.95191], [106.97228, 21.92592], [106.92714, 21.93459], [106.9178, 21.97357], [106.81038, 21.97934], [106.74345, 22.00965], [106.72551, 21.97923], [106.69276, 21.96013], [106.68274, 21.99811], [106.70142, 22.02409], [106.6983, 22.15102], [106.67495, 22.1885], [106.69986, 22.22309], [106.6516, 22.33977], [106.55976, 22.34841], [106.57221, 22.37], [106.55665, 22.46498], [106.58395, 22.474], [106.61269, 22.60301], [106.65316, 22.5757], [106.71698, 22.58432], [106.72321, 22.63606], [106.76293, 22.73491], [106.82404, 22.7881], [106.83685, 22.8098], [106.81271, 22.8226], [106.78422, 22.81532], [106.71128, 22.85982], [106.71387, 22.88296], [106.6734, 22.89587], [106.6516, 22.86862], [106.60179, 22.92884], [106.55976, 22.92311], [106.51306, 22.94891], [106.49749, 22.91164], [106.34961, 22.86718], [106.27022, 22.87722], [106.19705, 22.98475], [106.00179, 22.99049], [105.99568, 22.94178], [105.90119, 22.94168], [105.8726, 22.92756], [105.72382, 23.06641], [105.57594, 23.075], [105.56037, 23.16806], [105.49966, 23.20669], [105.42805, 23.30824], [105.40782, 23.28107], [105.32376, 23.39684], [105.22569, 23.27249], [105.17276, 23.28679], [105.11672, 23.25247], [105.07002, 23.26248], [104.98712, 23.19176], [104.96532, 23.20463], [104.9486, 23.17235], [104.91435, 23.18666], [104.87992, 23.17141], [104.87382, 23.12854], [104.79478, 23.12934], [104.8334, 23.01484], [104.86765, 22.95178], [104.84942, 22.93631], [104.77114, 22.90017], [104.72755, 22.81984], [104.65283, 22.83419], [104.60457, 22.81841], [104.58122, 22.85571], [104.47225, 22.75813], [104.35593, 22.69353], [104.25683, 22.76534], [104.27084, 22.8457], [104.11384, 22.80363], [104.03734, 22.72945], [104.01088, 22.51823], [103.99247, 22.51958], [103.97384, 22.50634], [103.96783, 22.51173], [103.96352, 22.50584], [103.95191, 22.5134], [103.94513, 22.52553], [103.93286, 22.52703], [103.87904, 22.56683], [103.64506, 22.79979], [103.56255, 22.69499], [103.57812, 22.65764], [103.52675, 22.59155], [103.43646, 22.70648], [103.43179, 22.75816], [103.32282, 22.8127], [103.28079, 22.68063], [103.18895, 22.64471], [103.15782, 22.59873], [103.17961, 22.55705], [103.07843, 22.50097], [103.0722, 22.44775], [102.9321, 22.48659], [102.8636, 22.60735], [102.60675, 22.73376], [102.57095, 22.7036], [102.51802, 22.77969], [102.46665, 22.77108], [102.42618, 22.69212], [102.38415, 22.67919], [102.41061, 22.64184], [102.25339, 22.4607], [102.26428, 22.41321], [102.16621, 22.43336], [102.14099, 22.40092], [102.18712, 22.30403], [102.51734, 22.02676], [102.49092, 21.99002], [102.62301, 21.91447], [102.67145, 21.65894], [102.74189, 21.66713], [102.82115, 21.73667], [102.81894, 21.83888], [102.85637, 21.84501], [102.86077, 21.71213], [102.97965, 21.74076], [102.98846, 21.58936], [102.86297, 21.4255], [102.94223, 21.46034], [102.88939, 21.3107], [102.80794, 21.25736], [102.89825, 21.24707], [102.97745, 21.05821], [103.03469, 21.05821], [103.12055, 20.89994], [103.21497, 20.89832], [103.38032, 20.79501], [103.45737, 20.82382], [103.68633, 20.66324], [103.73478, 20.6669], [103.82282, 20.8732], [103.98024, 20.91531], [104.11121, 20.96779], [104.27412, 20.91433], [104.63957, 20.6653], [104.38199, 20.47155], [104.40621, 20.3849], [104.47886, 20.37459], [104.66158, 20.47774], [104.72102, 20.40554], [104.62195, 20.36633], [104.61315, 20.24452], [104.86852, 20.14121], [104.91695, 20.15567], [104.9874, 20.09573], [104.8465, 19.91783], [104.8355, 19.80395], [104.68359, 19.72729], [104.64837, 19.62365], [104.53169, 19.61743], [104.41281, 19.70035], [104.23229, 19.70242], [104.06498, 19.66926], [104.05617, 19.61743], [104.10832, 19.51575], [104.06058, 19.43484], [103.87125, 19.31854], [104.5361, 18.97747], [104.64617, 18.85668], [105.12829, 18.70453], [105.19654, 18.64196], [105.1327, 18.58355], [105.10408, 18.43533], [105.15942, 18.38691], [105.38366, 18.15315], [105.46292, 18.22008], [105.64784, 17.96687], [105.60381, 17.89356], [105.76612, 17.67147], [105.85744, 17.63221], [106.09019, 17.36399], [106.18991, 17.28227], [106.24444, 17.24714], [106.29287, 17.3018], [106.31929, 17.20509], [106.43597, 17.01362], [106.50862, 16.9673], [106.55045, 17.0031], [106.54824, 16.92729], [106.51963, 16.92097], [106.52183, 16.87884], [106.55265, 16.86831], [106.55485, 16.68704], [106.59013, 16.62259], [106.58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+         }
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "VU",
+           iso1A3: "VUT",
+           iso1N3: "548",
+           wikidata: "Q686",
+           nameEn: "Vanuatu",
+           groups: ["054", "009", "UN"],
+           callingCodes: ["678"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[156.73836, -14.50464], [174.245, -23.1974], [172.71443, -12.01327], [156.73836, -14.50464]]]]
+         }
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "WF",
+           iso1A3: "WLF",
+           iso1N3: "876",
+           wikidata: "Q35555",
+           nameEn: "Wallis and Futuna",
+           country: "FR",
+           groups: ["Q1451600", "061", "009", "UN"],
+           callingCodes: ["681"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[-178.66551, -14.32452], [-176.76826, -14.95183], [-175.59809, -12.61507], [-178.66551, -14.32452]]]]
+         }
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "WS",
+           iso1A3: "WSM",
+           iso1N3: "882",
+           wikidata: "Q683",
+           nameEn: "Samoa",
+           groups: ["061", "009", "UN"],
+           driveSide: "left",
+           callingCodes: ["685"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[-173.74402, -14.26669], [-170.99605, -15.1275], [-171.39864, -10.21587], [-173.74402, -14.26669]]]]
+         }
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "XK",
+           iso1A3: "XKX",
+           wikidata: "Q1246",
+           nameEn: "Kosovo",
+           aliases: ["KV"],
+           groups: ["039", "150"],
+           isoStatus: "usrAssn",
+           callingCodes: ["383"]
+         },
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+         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
 
-           nodes = nodes.filter(noRepeatNodes); // If the way was closed before, append a connector node to keep it closed..
+       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;
 
-           if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
-             nodes.push(nodes[0]);
-           }
+       function canonicalID(id) {
+         var s = id || "";
 
-           return this.update({
-             nodes: nodes
-           });
-         },
-         // Removes each occurrence of node id.
-         // Consecutive duplicates are eliminated including existing ones.
-         // Circularity is preserved.
-         removeNode: function removeNode(id) {
-           var nodes = this.nodes.slice();
-           var isClosed = this.isClosed();
-           nodes = nodes.filter(function (node) {
-             return node !== id;
-           }).filter(noRepeatNodes); // If the way was closed before, append a connector node to keep it closed..
+         if (s.charAt(0) === ".") {
+           return s.toUpperCase();
+         } else {
+           return s.replace(idFilterRegex, "").toUpperCase();
+         }
+       }
 
-           if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
-             nodes.push(nodes[0]);
-           }
+       var levels = ["subterritory", "territory", "subcountryGroup", "country", "sharedLandform", "intermediateRegion", "subregion", "region", "subunion", "union", "unitedNations", "world"];
+       loadDerivedDataAndCaches(borders);
 
-           return this.update({
-             nodes: nodes
+       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;
            });
-         },
-         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)
-             }
-           };
+           loadMembersForGroupsOf(_feature);
+         }
 
-           if (changeset_id) {
-             r.way['@changeset'] = changeset_id;
-           }
+         for (var _i2 in borders2.features) {
+           var _feature2 = borders2.features[_i2];
+           loadRoadSpeedUnit(_feature2);
+           loadRoadHeightUnit(_feature2);
+           loadDriveSide(_feature2);
+           loadCallingCodes(_feature2);
+           loadGroupGroups(_feature2);
+         }
 
-           return r;
-         },
-         asGeoJSON: function asGeoJSON(resolver) {
-           return resolver["transient"](this, 'GeoJSON', function () {
-             var coordinates = resolver.childNodes(this).map(function (n) {
-               return n.loc;
-             });
+         for (var _i3 in borders2.features) {
+           var _feature3 = borders2.features[_i3];
 
-             if (this.isArea() && this.isClosed()) {
-               return {
-                 type: 'Polygon',
-                 coordinates: [coordinates]
-               };
-             } else {
-               return {
-                 type: 'LineString',
-                 coordinates: coordinates
-               };
-             }
+           _feature3.properties.groups.sort(function (groupID1, groupID2) {
+             return levels.indexOf(featuresByCode[groupID1].properties.level) - levels.indexOf(featuresByCode[groupID2].properties.level);
            });
-         },
-         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;
-               })]
-             };
-
-             if (!this.isClosed() && nodes.length) {
-               json.coordinates[0].push(nodes[0].loc);
-             }
 
-             var area = d3_geoArea(json); // Heuristic for detecting counterclockwise winding order. Assumes
-             // that OpenStreetMap polygons are not hemisphere-spanning.
+           if (_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 (area > 2 * Math.PI) {
-               json.coordinates[0] = json.coordinates[0].reverse();
-               area = d3_geoArea(json);
+             if (diff === 0) {
+               return borders2.features.indexOf(featuresByCode[id1]) - borders2.features.indexOf(featuresByCode[id2]);
              }
 
-             return isNaN(area) ? 0 : area;
+             return diff;
            });
          }
-       }); // Filter function to eliminate consecutive duplicates.
 
-       function noRepeatNodes(node, i, arr) {
-         return i === 0 || node !== arr[i - 1];
-       }
+         var geometryOnlyCollection = {
+           type: "FeatureCollection",
+           features: geometryFeatures
+         };
+         whichPolygonGetter = whichPolygon_1(geometryOnlyCollection);
 
-       //
-       // 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 loadGroups(feature2) {
+           var props = feature2.properties;
 
-       function osmOldMultipolygonOuterMemberOfRelation(entity, graph) {
-         if (entity.type !== 'relation' || !entity.isMultipolygon() || Object.keys(entity.tags).filter(osmIsInterestingTag).length > 1) {
-           return false;
+           if (!props.groups) {
+             props.groups = [];
+           }
+
+           if (feature2.geometry && props.country) {
+             props.groups.push(props.country);
+           }
+
+           if (props.m49 !== "001") {
+             props.groups.push("001");
+           }
          }
 
-         var outerMember;
+         function loadM49(feature2) {
+           var props = feature2.properties;
 
-         for (var memberIndex in entity.members) {
-           var member = entity.members[memberIndex];
+           if (!props.m49 && props.iso1N3) {
+             props.m49 = props.iso1N3;
+           }
+         }
 
-           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);
+         function loadTLD(feature2) {
+           var props = feature2.properties;
+           if (props.level === "unitedNations") return;
 
-             if (Object.keys(outerMember.tags).filter(osmIsInterestingTag).length === 0) {
-               return false;
-             }
+           if (!props.ccTLD && props.iso1A2) {
+             props.ccTLD = "." + props.iso1A2.toLowerCase();
            }
          }
 
-         return outerMember;
-       } // For fixing up rendering of multipolygons with tags on the outer member.
-       // https://github.com/openstreetmap/iD/issues/613
+         function loadIsoStatus(feature2) {
+           var props = feature2.properties;
 
-       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 (!props.isoStatus && props.iso1A2) {
+             props.isoStatus = "official";
+           }
+         }
 
-         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
+         function loadLevel(feature2) {
+           var props = feature2.properties;
+           if (props.level) return;
 
-           if (member.id !== entity.id && (!member.role || member.role === 'outer')) return false; // Not a simple multipolygon
+           if (!props.country) {
+             props.level = "country";
+           } else if (!props.iso1A2 || props.isoStatus === "official") {
+             props.level = "territory";
+           } else {
+             props.level = "subterritory";
+           }
          }
 
-         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;
+         function loadGroupGroups(feature2) {
+           var props = feature2.properties;
+           if (feature2.geometry || !props.members) return;
+           var featureLevelIndex = levels.indexOf(props.level);
+           var sharedGroups = [];
 
-         for (var i = 0; i < members.length; i++) {
-           member = members[i];
+           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 (!member.role || member.role === 'outer') {
-             if (outerMember) return false; // Not a simple multipolygon
+             if (_i4 === "0") {
+               sharedGroups = memberGroups;
+             } else {
+               sharedGroups = sharedGroups.filter(function (groupID) {
+                 return memberGroups.indexOf(groupID) !== -1;
+               });
+             }
+           };
 
-             outerMember = member;
+           for (var _i4 in props.members) {
+             _loop(_i4);
            }
-         }
 
-         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.
-       //
+           props.groups = props.groups.concat(sharedGroups.filter(function (groupID) {
+             return props.groups.indexOf(groupID) === -1;
+           }));
 
-       function osmJoinWays(toJoin, graph) {
-         function resolve(member) {
-           return graph.childNodes(graph.entity(member.id));
-         }
+           for (var j in sharedGroups) {
+             var groupFeature = featuresByCode[sharedGroups[j]];
 
-         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
+             if (groupFeature.properties.members.indexOf(props.id) === -1) {
+               groupFeature.properties.members.push(props.id);
+             }
+           }
+         }
 
+         function loadRoadSpeedUnit(feature2) {
+           var props = feature2.properties;
 
-         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)
+           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];
+           }
+         }
 
-         var i;
-         var joinAsMembers = true;
+         function loadRoadHeightUnit(feature2) {
+           var props = feature2.properties;
 
-         for (i = 0; i < toJoin.length; i++) {
-           if (toJoin[i] instanceof osmWay) {
-             joinAsMembers = false;
-             break;
+           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];
            }
          }
 
-         var sequences = [];
-         sequences.actions = [];
-
-         while (toJoin.length) {
-           // start a new sequence
-           var item = toJoin.shift();
-           var currWays = [item];
-           var currNodes = resolve(item).slice(); // add to it
+         function loadDriveSide(feature2) {
+           var props = feature2.properties;
 
-           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 (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];
+           }
+         }
 
-             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.
+         function loadCallingCodes(feature2) {
+           var props = feature2.properties;
 
-               if (joinAsMembers && currWays.length === 1 && nodes[0] !== end && nodes[nodes.length - 1] !== end && (nodes[nodes.length - 1] === start || nodes[0] === start)) {
-                 currWays[0] = reverse(currWays[0]);
-                 currNodes.reverse();
-                 start = currNodes[0];
-                 end = currNodes[currNodes.length - 1];
-               }
+           if (!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;
+             }, [])));
+           }
+         }
 
-               if (nodes[0] === end) {
-                 fn = currNodes.push; // join to end
+         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;
+         }
 
-                 nodes = nodes.slice(1);
-                 break;
-               } else if (nodes[nodes.length - 1] === end) {
-                 fn = currNodes.push; // join to end
+         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);
+           }
+         }
 
-                 nodes = nodes.slice(0, -1).reverse();
-                 item = reverse(item);
-                 break;
-               } else if (nodes[nodes.length - 1] === start) {
-                 fn = currNodes.unshift; // join to beginning
+         function cacheFeatureByIDs(feature2) {
+           var ids = [];
 
-                 nodes = nodes.slice(0, -1);
-                 break;
-               } else if (nodes[0] === start) {
-                 fn = currNodes.unshift; // join to beginning
+           for (var k in identifierProps) {
+             var prop = identifierProps[k];
+             var id = feature2.properties[prop];
+             if (id) ids.push(id);
+           }
 
-                 nodes = nodes.slice(1).reverse();
-                 item = reverse(item);
-                 break;
-               } else {
-                 fn = nodes = null;
-               }
+           if (feature2.properties.aliases) {
+             for (var j in feature2.properties.aliases) {
+               ids.push(feature2.properties.aliases[j]);
              }
+           }
 
-             if (!nodes) {
-               // couldn't find a joinable way/member
-               break;
-             }
+           for (var _i5 in ids) {
+             var _id = canonicalID(ids[_i5]);
 
-             fn.apply(currWays, [item]);
-             fn.apply(currNodes, nodes);
-             toJoin.splice(i, 1);
+             featuresByCode[_id] = feature2;
            }
+         }
+       }
 
-           currWays.nodes = currNodes;
-           sequences.push(currWays);
+       function locArray(loc) {
+         if (Array.isArray(loc)) {
+           return loc;
+         } else if (loc.coordinates) {
+           return loc.coordinates;
          }
 
-         return sequences;
+         return loc.geometry.coordinates;
        }
 
-       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 smallestFeature(loc) {
+         var query = locArray(loc);
+         var featureProperties = whichPolygonGetter(query);
+         if (!featureProperties) return null;
+         return featuresByCode[featureProperties.id];
+       }
 
-           var isPTv2 = /stop|platform/.test(member.role);
+       function countryFeature(loc) {
+         var feature2 = smallestFeature(loc);
+         if (!feature2) return null;
+         var countryCode = feature2.properties.country || feature2.properties.iso1A2;
+         return featuresByCode[countryCode] || null;
+       }
 
-           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;
-             }
+       var defaultOpts = {
+         level: void 0,
+         maxLevel: void 0,
+         withProp: void 0
+       };
 
-             graph = graph.replace(relation.addMember(member, memberIndex));
-           }
+       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;
 
-           return graph;
-         }; // Add a way member into the relation "wherever it makes sense".
-         // In this situation we were not supplied a memberIndex.
+         if (targetLevel === "country") {
+           var fastFeature = countryFeature(loc);
 
-         function addWayMember(relation, graph) {
-           var groups, tempWay, item, i, j, k; // remove PTv2 stops and platforms before doing anything.
+           if (fastFeature) {
+             if (!withProp || fastFeature.properties[withProp]) {
+               return fastFeature;
+             }
+           }
+         }
 
-           var PTv2members = [];
-           var members = [];
+         var features2 = featuresContaining(loc);
 
-           for (i = 0; i < relation.members.length; i++) {
-             var m = relation.members[i];
+         for (var i in features2) {
+           var feature2 = features2[i];
+           var levelIndex = levels.indexOf(feature2.properties.level);
 
-             if (/stop|platform/.test(m.role)) {
-               PTv2members.push(m);
-             } else {
-               members.push(m);
+           if (feature2.properties.level === targetLevel || levelIndex > targetLevelIndex && levelIndex <= maxLevelIndex) {
+             if (!withProp || feature2.properties[withProp]) {
+               return feature2;
              }
            }
+         }
 
-           relation = relation.update({
-             members: members
-           });
-
-           if (insertPair) {
-             // We're adding a member that must stay paired with an existing member.
-             // (This feature is used by `actionSplit`)
-             //
-             // This is tricky because the members may exist multiple times in the
-             // member list, and with different A-B/B-A ordering and different roles.
-             // (e.g. a bus route that loops out and back - #4589).
-             //
-             // Replace the existing member with a temporary way,
-             // so that `osmJoinWays` can treat the pair like a single way.
-             tempWay = osmWay({
-               id: 'wTemp',
-               nodes: insertPair.nodes
-             });
-             graph = graph.replace(tempWay);
-             var tempMember = {
-               id: tempWay.id,
-               type: 'way',
-               role: member.role
-             };
-             var tempRelation = relation.replaceMember({
-               id: insertPair.originalID
-             }, tempMember, true);
-             groups = utilArrayGroupBy(tempRelation.members, 'type');
-             groups.way = groups.way || [];
-           } else {
-             // Add the member anywhere, one time. Just push and let `osmJoinWays` decide where to put it.
-             groups = utilArrayGroupBy(relation.members, 'type');
-             groups.way = groups.way || [];
-             groups.way.push(member);
-           }
+         return null;
+       }
 
-           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
+       function featureForID(id) {
+         var stringID;
 
-           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
+         if (typeof id === "number") {
+           stringID = id.toString();
 
-             for (j = 0; j < members.length; j++) {
-               if (members[j].index === startIndex) {
-                 break;
-               }
-             } // k = each member in segment
+           if (stringID.length === 1) {
+             stringID = "00" + stringID;
+           } else if (stringID.length === 2) {
+             stringID = "0" + stringID;
+           }
+         } else {
+           stringID = canonicalID(id);
+         }
 
+         return featuresByCode[stringID] || null;
+       }
 
-             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
+       function smallestFeaturesForBbox(bbox) {
+         return whichPolygonGetter.bbox(bbox).map(function (props) {
+           return featuresByCode[props.id];
+         });
+       }
 
-               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
+       function smallestOrMatchingFeature(query) {
+         if (_typeof(query) === "object") {
+           return smallestFeature(query);
+         }
 
+         return featureForID(query);
+       }
 
-               if (k > 0) {
-                 if (j + k >= members.length || item.index !== members[j + k].index) {
-                   moveMember(members, item.index, j + k);
-                 }
-               }
+       function feature$1(query) {
+         var opts = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : defaultOpts;
 
-               nodes.splice(0, way.nodes.length - 1);
-             }
-           }
+         if (_typeof(query) === "object") {
+           return featureForLoc(query, opts);
+         }
 
-           if (tempWay) {
-             graph = graph.remove(tempWay);
-           } // Final pass: skip dead items, split pairs, remove index properties
+         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;
+       }
 
-           var wayMembers = [];
+       function featuresContaining(query, strict) {
+         var matchingFeatures;
 
-           for (i = 0; i < members.length; i++) {
-             item = members[i];
-             if (item.index === -1) continue;
+         if (Array.isArray(query) && query.length === 4) {
+           matchingFeatures = smallestFeaturesForBbox(query);
+         } else {
+           var smallestOrMatching = smallestOrMatchingFeature(query);
+           matchingFeatures = smallestOrMatching ? [smallestOrMatching] : [];
+         }
 
-             if (item.pair) {
-               wayMembers.push(item.pair[0]);
-               wayMembers.push(item.pair[1]);
-             } else {
-               wayMembers.push(utilObjectOmit(item, ['index']));
-             }
-           } // Put stops and platforms first, then nodes, ways, relations
-           // This is recommended for Public Transport v2 routes:
-           // see https://wiki.openstreetmap.org/wiki/Public_transport#Service_routes
+         if (!matchingFeatures.length) return [];
+         var returnFeatures;
 
+         if (!strict || _typeof(query) === "object") {
+           returnFeatures = matchingFeatures.slice();
+         } else {
+           returnFeatures = [];
+         }
 
-           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 (var j in matchingFeatures) {
+           var properties = matchingFeatures[j].properties;
 
-           function moveMember(arr, findIndex, toIndex) {
-             var i;
+           for (var i in properties.groups) {
+             var groupID = properties.groups[i];
+             var groupFeature = featuresByCode[groupID];
 
-             for (i = 0; i < arr.length; i++) {
-               if (arr[i].index === findIndex) {
-                 break;
-               }
+             if (returnFeatures.indexOf(groupFeature) === -1) {
+               returnFeatures.push(groupFeature);
              }
+           }
+         }
 
-             var item = Object.assign({}, arr[i]); // shallow copy
-
-             arr[i].index = -1; // mark as dead
-
-             item.index = toIndex;
-             arr.splice(toIndex, 0, item);
-           } // This is the same as `Relation.indexedMembers`,
-           // Except we don't want to index all the members, only the ways
-
+         return returnFeatures;
+       }
 
-           function withIndex(arr) {
-             var result = new Array(arr.length);
+       function featuresIn(id, strict) {
+         var feature2 = featureForID(id);
+         if (!feature2) return [];
+         var features2 = [];
 
-             for (var i = 0; i < arr.length; i++) {
-               result[i] = Object.assign({}, arr[i]); // shallow copy
+         if (!strict) {
+           features2.push(feature2);
+         }
 
-               result[i].index = i;
-             }
+         var properties = feature2.properties;
 
-             return result;
+         if (properties.members) {
+           for (var i in properties.members) {
+             var memberID = properties.members[i];
+             features2.push(featuresByCode[memberID]);
            }
          }
+
+         return features2;
        }
 
-       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 aggregateFeature(id) {
+         var features2 = featuresIn(id, false);
+         if (features2.length === 0) return null;
+         var aggregateCoordinates = [];
 
-                 return;
-               }
-             }
-           });
-           return graph;
-         };
-       }
+         for (var i in features2) {
+           var feature2 = features2[i];
 
-       // 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));
-         };
-       }
+           if (feature2.geometry && feature2.geometry.type === "MultiPolygon" && feature2.geometry.coordinates) {
+             aggregateCoordinates = aggregateCoordinates.concat(feature2.geometry.coordinates);
+           }
+         }
 
-       function actionChangeMember(relationId, member, memberIndex) {
-         return function (graph) {
-           return graph.replace(graph.entity(relationId).updateMember(member, memberIndex));
+         return {
+           type: "Feature",
+           properties: features2[0].properties,
+           geometry: {
+             type: "MultiPolygon",
+             coordinates: aggregateCoordinates
+           }
          };
        }
 
-       function actionChangePreset(entityID, oldPreset, newPreset, skipFieldDefaults) {
-         return function action(graph) {
-           var entity = graph.entity(entityID);
-           var geometry = entity.geometry(graph);
-           var tags = entity.tags;
-           if (oldPreset) tags = oldPreset.unsetTags(tags, geometry);
-           if (newPreset) tags = newPreset.setTags(tags, geometry, skipFieldDefaults);
-           return graph.replace(entity.update({
-             tags: tags
-           }));
-         };
+       function roadSpeedUnit(query) {
+         var feature2 = smallestOrMatchingFeature(query);
+         return feature2 && feature2.properties.roadSpeedUnit || null;
        }
 
-       function actionChangeTags(entityId, tags) {
-         return function (graph) {
-           var entity = graph.entity(entityId);
-           return graph.replace(entity.update({
-             tags: tags
-           }));
-         };
-       }
+       var RADIUS = 6378137;
+       var FLATTENING = 1 / 298.257223563;
+       var POLAR_RADIUS = 6356752.3142;
+       var wgs84 = {
+         RADIUS: RADIUS,
+         FLATTENING: FLATTENING,
+         POLAR_RADIUS: POLAR_RADIUS
+       };
 
-       function osmNode() {
-         if (!(this instanceof osmNode)) {
-           return new osmNode().initialize(arguments);
-         } else if (arguments.length) {
-           this.initialize(arguments);
+       var geometry_1 = geometry;
+       var 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;
          }
        }
-       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
+       function polygonArea(coords) {
+         var area = 0;
 
-             var re = /:direction$/i;
-             var keys = Object.keys(this.tags);
+         if (coords && coords.length > 0) {
+           area += Math.abs(ringArea(coords[0]));
 
-             for (i = 0; i < keys.length; i++) {
-               if (re.test(keys[i])) {
-                 val = this.tags[keys[i]].toLowerCase();
-                 break;
-               }
-             }
+           for (var i = 1; i < coords.length; i++) {
+             area -= Math.abs(ringArea(coords[i]));
            }
+         }
 
-           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
+         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.
+        */
 
 
-             if (v !== '' && !isNaN(+v)) {
-               results.push(+v);
-               return;
-             } // string direction - inspect parent ways
+       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;
+             }
 
-             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;
+             p1 = coords[lowerIndex];
+             p2 = coords[middleIndex];
+             p3 = coords[upperIndex];
+             area += (rad(p3[0]) - rad(p1[0])) * Math.sin(rad(p2[1]));
+           }
 
-               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
-                   }
+           area = area * wgs84.RADIUS * wgs84.RADIUS / 2;
+         }
 
-                   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);
+         return area;
+       }
 
-             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();
+       function rad(_) {
+         return _ * Math.PI / 180;
+       }
 
-               if (way.isClosed()) {
-                 nodes.pop();
-               } // ignore connecting node if closed
-               // return true if vertex appears multiple times (way is self intersecting)
+       var geojsonArea = {
+         geometry: geometry_1,
+         ring: ring
+       };
 
+       var $includes = arrayIncludes.includes;
 
-               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';
-             });
-           });
-         },
-         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
-           };
+       // `Array.prototype.includes` method
+       // https://tc39.es/ecma262/#sec-array.prototype.includes
+       _export({ target: 'Array', proto: true }, {
+         includes: function includes(el /* , fromIndex = 0 */) {
+           return $includes(this, el, arguments.length > 1 ? arguments[1] : undefined);
          }
        });
 
-       function actionCircularize(wayId, projection, maxAngle) {
-         maxAngle = (maxAngle || 20) * Math.PI / 180;
+       // https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
+       addToUnscopables('includes');
 
-         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;
-           });
+       var validateCenter_1$1 = function validateCenter(center) {
+         var validCenterLengths = [2, 3];
 
-           if (!way.isConvex(graph)) {
-             graph = action.makeConvex(graph);
-           }
+         if (!Array.isArray(center) || !validCenterLengths.includes(center.length)) {
+           throw new Error("ERROR! Center has to be an array of length two or three");
+         }
 
-           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 _center = _slicedToArray(center, 2),
+             lng = _center[0],
+             lat = _center[1];
 
-           if (!keyNodes.length) {
-             keyNodes = [nodes[0]];
-             keyPoints = [points[0]];
-           }
+         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 (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 (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));
+         }
+       };
 
-           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;
+       var validateCenter$1 = {
+         validateCenter: validateCenter_1$1
+       };
 
-             if (indexRange < 0) {
-               indexRange += nodes.length;
-             } // position this key node
+       var validateRadius_1$1 = 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 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 validateRadius$1 = {
+         validateRadius: validateRadius_1$1
+       };
 
-             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
+       var validateNumberOfEdges_1$1 = 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 (totalAngle * sign > 0) {
-               totalAngle = -sign * (2 * Math.PI - Math.abs(totalAngle));
-             }
+         if (numberOfEdges < 3) {
+           throw new Error("ERROR! Number of edges has to be at least 3 but was: ".concat(numberOfEdges));
+         }
+       };
 
-             do {
-               numberNewPoints++;
-               eachAngle = totalAngle / (indexRange + numberNewPoints);
-             } while (Math.abs(eachAngle) > maxAngle); // move existing nodes
+       var validateNumberOfEdges$1 = {
+         validateNumberOfEdges: validateNumberOfEdges_1$1
+       };
 
+       var validateEarthRadius_1$1 = 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));
+         }
 
-             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
+         if (earthRadius <= 0) {
+           throw new Error("ERROR! Earth radius has to be a positive number but was: ".concat(earthRadius));
+         }
+       };
 
+       var validateEarthRadius$1 = {
+         validateEarthRadius: validateEarthRadius_1$1
+       };
 
-             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 validateBearing_1$1 = 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 min = Infinity;
+       var validateBearing$1 = {
+         validateBearing: validateBearing_1$1
+       };
 
-               for (var nodeId in nearNodes) {
-                 var nearAngle = nearNodes[nodeId];
-                 var dist = Math.abs(nearAngle - angle);
+       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;
 
-                 if (dist < min) {
-                   min = dist;
-                   origNode = origNodes[nodeId];
-                 }
-               }
+       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);
+       }
+
+       var validateCenter_1 = validateCenter;
+       var validateRadius_1 = validateRadius;
+       var validateNumberOfEdges_1 = validateNumberOfEdges;
+       var validateEarthRadius_1 = validateEarthRadius;
+       var validateBearing_1 = validateBearing;
+       var validateInput_1 = validateInput$1;
+       var inputValidation = {
+         validateCenter: validateCenter_1,
+         validateRadius: validateRadius_1,
+         validateNumberOfEdges: validateNumberOfEdges_1,
+         validateEarthRadius: validateEarthRadius_1,
+         validateBearing: validateBearing_1,
+         validateInput: validateInput_1
+       };
 
-               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..
+       var validateInput = inputValidation.validateInput;
+       var defaultEarthRadius = 6378137; // equatorial Earth radius
 
+       function toRadians(angleInDegrees) {
+         return angleInDegrees * Math.PI / 180;
+       }
 
-             if (indexRange === 1 && inBetweenNodes.length) {
-               var startIndex1 = way.nodes.lastIndexOf(startNode.id);
-               var endIndex1 = way.nodes.lastIndexOf(endNode.id);
-               var wayDirection1 = endIndex1 - startIndex1;
+       function toDegrees(angleInRadians) {
+         return angleInRadians * 180 / Math.PI;
+       }
 
-               if (wayDirection1 < -1) {
-                 wayDirection1 = 1;
-               }
+       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 parentWays = graph.parentWays(keyNodes[i]);
+       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
 
-               for (j = 0; j < parentWays.length; j++) {
-                 var sharedWay = parentWays[j];
-                 if (sharedWay === way) continue;
+         validateInput({
+           center: center,
+           radius: radius,
+           numberOfEdges: n,
+           earthRadius: earthRadius,
+           bearing: bearing
+         });
+         var start = toRadians(bearing);
+         var coordinates = [];
 
-                 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;
+         for (var i = 0; i < n; ++i) {
+           coordinates.push(offset(center, radius, earthRadius, start + direction * 2 * Math.PI * -i / n));
+         }
 
-                   if (wayDirection2 < -1) {
-                     wayDirection2 = 1;
-                   }
+         coordinates.push(coordinates[0]);
+         return {
+           type: "Polygon",
+           coordinates: [coordinates]
+         };
+       };
 
-                   if (wayDirection1 !== wayDirection2) {
-                     inBetweenNodes.reverse();
-                     insertAt = startIndex2;
-                   }
+       function getNumberOfEdges(options) {
+         if (isUndefinedOrNull(options)) {
+           return 32;
+         } else if (isObjectNotArray(options)) {
+           var numberOfEdges = options.numberOfEdges;
+           return numberOfEdges === undefined ? 32 : numberOfEdges;
+         }
 
-                   for (k = 0; k < inBetweenNodes.length; k++) {
-                     sharedWay = sharedWay.addNode(inBetweenNodes[k], insertAt + k);
-                   }
+         return options;
+       }
 
-                   graph = graph.replace(sharedWay);
-                 }
-               }
-             }
-           } // update the way to have all the new nodes
+       function getEarthRadius(options) {
+         if (isUndefinedOrNull(options)) {
+           return defaultEarthRadius;
+         } else if (isObjectNotArray(options)) {
+           var earthRadius = options.earthRadius;
+           return earthRadius === undefined ? defaultEarthRadius : earthRadius;
+         }
 
+         return defaultEarthRadius;
+       }
 
-           ids = nodes.map(function (n) {
-             return n.id;
-           });
-           ids.push(ids[0]);
-           way = way.update({
-             nodes: ids
-           });
-           graph = graph.replace(way);
-           return graph;
-         };
+       function getDirection(options) {
+         if (isObjectNotArray(options) && options.rightHandRule) {
+           return -1;
+         }
 
-         action.makeConvex = function (graph) {
-           var way = graph.entity(wayId);
-           var nodes = utilArrayUniq(graph.childNodes(way));
-           var points = nodes.map(function (n) {
-             return projection(n.loc);
-           });
-           var sign = d3_polygonArea(points) > 0 ? 1 : -1;
-           var hull = d3_polygonHull(points);
-           var i, j; // D3 convex hulls go counterclockwise..
+         return 1;
+       }
 
-           if (sign === -1) {
-             nodes.reverse();
-             points.reverse();
-           }
+       function getBearing(options) {
+         if (isUndefinedOrNull(options)) {
+           return 0;
+         } else if (isObjectNotArray(options)) {
+           var bearing = options.bearing;
+           return bearing === undefined ? 0 : bearing;
+         }
 
-           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;
+         return 0;
+       }
 
-             if (indexRange < 0) {
-               indexRange += nodes.length;
-             } // move interior nodes to the surface of the convex hull..
+       function isObjectNotArray(argument) {
+         return argument !== null && _typeof(argument) === "object" && !Array.isArray(argument);
+       }
 
+       function isUndefinedOrNull(argument) {
+         return argument === null || argument === undefined;
+       }
 
-             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);
-             }
-           }
+       // `Number.EPSILON` constant
+       // https://tc39.es/ecma262/#sec-number.epsilon
+       _export({ target: 'Number', stat: true }, {
+         EPSILON: Math.pow(2, -52)
+       });
 
-           return graph;
-         };
+       var quot = /"/g;
 
-         action.disabled = function (graph) {
-           if (!graph.entity(wayId).isClosed()) {
-             return 'not_closed';
-           } //disable when already circular
+       // `CreateHTML` abstract operation
+       // https://tc39.es/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 + '>';
+       };
 
+       // 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;
+         });
+       };
 
-           var way = graph.entity(wayId);
-           var nodes = utilArrayUniq(graph.childNodes(way));
-           var points = nodes.map(function (n) {
-             return projection(n.loc);
-           });
-           var hull = d3_polygonHull(points);
-           var epsilonAngle = Math.PI / 180;
+       // `String.prototype.link` method
+       // https://tc39.es/ecma262/#sec-string.prototype.link
+       _export({ target: 'String', proto: true, forced: stringHtmlForced('link') }, {
+         link: function link(url) {
+           return createHtml(this, 'a', 'href', url);
+         }
+       });
 
-           if (hull.length !== points.length || hull.length < 3) {
-             return false;
-           }
+       /**
+        * 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;
+         }
 
-           var centroid = d3_polygonCentroid(points);
-           var radius = geoVecLengthSquare(centroid, points[0]);
-           var i, actualPoint; // compare distances between centroid and points
+         return Node;
+       }();
+       /* follows "An implementation of top-down splaying"
+        * by D. Sleator <sleator@cs.cmu.edu> March 1992
+        */
 
-           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 (diff > 0.05 * radius) {
-               return false;
-             }
-           } //check if central angles are smaller than maxAngle
+       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.
+        */
 
 
-           for (i = 0; i < hull.length; i++) {
-             actualPoint = hull[i];
-             var nextPoint = hull[(i + 1) % hull.length];
-             var startAngle = Math.atan2(actualPoint[1] - centroid[1], actualPoint[0] - centroid[0]);
-             var endAngle = Math.atan2(nextPoint[1] - centroid[1], nextPoint[0] - centroid[0]);
-             var angle = endAngle - startAngle;
+       function splay(i, t, comparator) {
+         var N = new Node(null, null);
+         var l = N;
+         var r = N;
 
-             if (angle < 0) {
-               angle = -angle;
-             }
+         while (true) {
+           var cmp = comparator(i, t.key); //if (i < t.key) {
 
-             if (angle > Math.PI) {
-               angle = 2 * Math.PI - angle;
-             }
+           if (cmp < 0) {
+             if (t.left === null) break; //if (i < t.left.key) {
 
-             if (angle > maxAngle + epsilonAngle) {
-               return false;
+             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;
              }
-           }
 
-           return 'already_circular';
-         };
+             r.left = t;
+             /* link right */
 
-         action.transitionable = true;
-         return action;
-       }
+             r = t;
+             t = t.left; //} else if (i > t.key) {
+           } else if (cmp > 0) {
+             if (t.right === null) break; //if (i > t.right.key) {
 
-       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 (comparator(i, t.right.key) > 0) {
+               var y = t.right;
+               /* rotate left */
 
-           if (geometries.point) return false; // delete if this node only be a vertex
+               t.right = y.left;
+               y.left = t;
+               t = y;
+               if (t.right === null) break;
+             }
 
-           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
+             l.right = t;
+             /* link left */
 
-           return !node.hasInterestingTags();
+             l = t;
+             t = t.right;
+           } else break;
          }
+         /* assemble */
 
-         var action = function action(graph) {
-           var way = graph.entity(wayID);
-           graph.parentRelations(way).forEach(function (parent) {
-             parent = parent.removeMembersWithID(wayID);
-             graph = graph.replace(parent);
 
-             if (parent.isDegenerate()) {
-               graph = actionDeleteRelation(parent.id)(graph);
-             }
-           });
-           new Set(way.nodes).forEach(function (nodeID) {
-             graph = graph.replace(way.removeNode(nodeID));
-             var node = graph.entity(nodeID);
+         l.right = t.left;
+         r.left = t.right;
+         t.left = N.right;
+         t.right = N.left;
+         return t;
+       }
 
-             if (canDeleteNode(node, graph)) {
-               graph = graph.remove(node);
-             }
-           });
-           return graph.remove(way);
-         };
+       function insert(i, data, t, comparator) {
+         var node = new Node(i, data);
 
-         return action;
-       }
+         if (t === null) {
+           node.left = node.right = null;
+           return node;
+         }
 
-       function actionDeleteMultiple(ids) {
-         var actions = {
-           way: actionDeleteWay,
-           node: actionDeleteNode,
-           relation: actionDeleteRelation
-         };
+         t = splay(i, t, comparator);
+         var cmp = comparator(i, t.key);
 
-         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;
-         };
+         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 action;
+         return node;
        }
 
-       function actionDeleteRelation(relationID, allowUntaggedMembers) {
-         function canDeleteEntity(entity, graph) {
-           return !graph.parentWays(entity).length && !graph.parentRelations(entity).length && !entity.hasInterestingTags() && !allowUntaggedMembers;
-         }
+       function split(key, v, comparator) {
+         var left = null;
+         var right = null;
 
-         var action = function action(graph) {
-           var relation = graph.entity(relationID);
-           graph.parentRelations(relation).forEach(function (parent) {
-             parent = parent.removeMembersWithID(relationID);
-             graph = graph.replace(parent);
+         if (v) {
+           v = splay(key, v, comparator);
+           var cmp = comparator(v.key, key);
 
-             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 (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;
+           }
+         }
 
-             if (canDeleteEntity(entity, graph)) {
-               graph = actionDeleteMultiple([memberID])(graph);
-             }
-           });
-           return graph.remove(relation);
+         return {
+           left: left,
+           right: right
          };
-
-         return action;
        }
 
-       function actionDeleteNode(nodeId) {
-         var action = function action(graph) {
-           var node = graph.entity(nodeId);
-           graph.parentWays(node).forEach(function (parent) {
-             parent = parent.removeNode(nodeId);
-             graph = graph.replace(parent);
-
-             if (parent.isDegenerate()) {
-               graph = actionDeleteWay(parent.id)(graph);
-             }
-           });
-           graph.parentRelations(node).forEach(function (parent) {
-             parent = parent.removeMembersWithID(nodeId);
-             graph = graph.replace(parent);
+       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
+        */
 
-             if (parent.isDegenerate()) {
-               graph = actionDeleteRelation(parent.id)(graph);
-             }
-           });
-           return graph.remove(node);
-         };
 
-         return action;
+       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);
+         }
        }
 
-       //
-       // 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
-       //
+       var Tree =
+       /** @class */
+       function () {
+         function Tree(comparator) {
+           if (comparator === void 0) {
+             comparator = DEFAULT_COMPARE;
+           }
 
-       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
+           this._root = null;
+           this._size = 0;
+           this._comparator = comparator;
+         }
+         /**
+          * Inserts a key, allows duplicates
+          */
 
-           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.
 
+         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
+          */
 
-           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));
-             }
+         Tree.prototype.add = function (key, data) {
+           var node = new Node(key, data);
 
-             parents = graph.parentRelations(node);
+           if (this._root === null) {
+             node.left = node.right = null;
+             this._size++;
+             this._root = node;
+           }
 
-             for (j = 0; j < parents.length; j++) {
-               graph = graph.replace(parents[j].replaceMember(node, survivor));
+           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;
              }
 
-             survivor = survivor.mergeTags(node.tags);
-             graph = actionDeleteNode(node.id)(graph);
+             this._size++;
+             this._root = node;
            }
+           return this._root;
+         };
+         /**
+          * @param  {Key} key
+          * @return {Node|null}
+          */
 
-           graph = graph.replace(survivor); // find and delete any degenerate ways created by connecting adjacent vertices
 
-           parents = graph.parentWays(survivor);
+         Tree.prototype.remove = function (key) {
+           this._root = this._remove(key, this._root, this._comparator);
+         };
+         /**
+          * Deletes i from the tree if it's there
+          */
 
-           for (i = 0; i < parents.length; i++) {
-             if (parents[i].isDegenerate()) {
-               graph = actionDeleteWay(parents[i].id)(graph);
+
+         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 graph;
+           return t;
+           /* It wasn't there */
          };
+         /**
+          * Removes and returns the node with smallest key
+          */
 
-         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
 
+         Tree.prototype.pop = function () {
+           var node = this._root;
 
-           for (i = 0; i < nodeIDs.length; i++) {
-             node = graph.entity(nodeIDs[i]);
-             relations = graph.parentRelations(node);
+           if (node) {
+             while (node.left) {
+               node = node.left;
+             }
 
-             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
+             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
+             };
+           }
 
-               if (relation.hasFromViaTo()) {
-                 restrictionIDs.push(relation.id);
-               }
+           return null;
+         };
+         /**
+          * Find without splaying
+          */
 
-               if (seen[relation.id] !== undefined && seen[relation.id] !== role) {
-                 return 'relation';
-               } else {
-                 seen[relation.id] = role;
-               }
-             }
-           } // gather restrictions for parent ways
 
+         Tree.prototype.findStatic = function (key) {
+           var current = this._root;
+           var compare = this._comparator;
 
-           for (i = 0; i < nodeIDs.length; i++) {
-             node = graph.entity(nodeIDs[i]);
-             var parents = graph.parentWays(node);
+           while (current) {
+             var cmp = compare(key, current.key);
+             if (cmp === 0) return current;else if (cmp < 0) current = current.left;else current = current.right;
+           }
 
-             for (j = 0; j < parents.length; j++) {
-               var parent = parents[j];
-               relations = graph.parentRelations(parent);
+           return null;
+         };
 
-               for (k = 0; k < relations.length; k++) {
-                 relation = relations[k];
+         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;
+           }
 
-                 if (relation.hasFromViaTo()) {
-                   restrictionIDs.push(relation.id);
-                 }
-               }
-             }
-           } // test restrictions
+           return this._root;
+         };
 
+         Tree.prototype.contains = function (key) {
+           var current = this._root;
+           var compare = this._comparator;
 
-           restrictionIDs = utilArrayUniq(restrictionIDs);
+           while (current) {
+             var cmp = compare(key, current.key);
+             if (cmp === 0) return true;else if (cmp < 0) current = current.left;else current = current.right;
+           }
 
-           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)
+           return false;
+         };
 
-             var nodes = {
-               from: [],
-               via: [],
-               to: [],
-               keyfrom: [],
-               keyto: []
-             };
+         Tree.prototype.forEach = function (visitor, ctx) {
+           var current = this._root;
+           var Q = [];
+           /* Initialize stack s */
 
-             for (j = 0; j < relation.members.length; j++) {
-               collectNodes(relation.members[j], nodes);
-             }
+           var done = false;
 
-             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;
+           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;
+             }
+           }
 
-             for (j = 0; j < nodeIDs.length; j++) {
-               var n = nodeIDs[j];
+           return this;
+         };
+         /**
+          * Walk key range from `low` to `high`. Stops if `fn` returns a value.
+          */
 
-               if (nodes.from.indexOf(n) !== -1) {
-                 connectFrom = true;
-               }
 
-               if (nodes.via.indexOf(n) !== -1) {
-                 connectVia = true;
-               }
+         Tree.prototype.range = function (low, high, fn, ctx) {
+           var Q = [];
+           var compare = this._comparator;
+           var node = this._root;
+           var cmp;
 
-               if (nodes.to.indexOf(n) !== -1) {
-                 connectTo = true;
-               }
+           while (Q.length !== 0 || node) {
+             if (node) {
+               Q.push(node);
+               node = node.left;
+             } else {
+               node = Q.pop();
+               cmp = compare(node.key, high);
 
-               if (nodes.keyfrom.indexOf(n) !== -1) {
-                 connectKeyFrom = true;
+               if (cmp > 0) {
+                 break;
+               } else if (compare(node.key, low) >= 0) {
+                 if (fn.call(ctx, node)) return this; // stop if smth is returned
                }
 
-               if (nodes.keyto.indexOf(n) !== -1) {
-                 connectKeyTo = true;
-               }
+               node = node.right;
              }
+           }
 
-             if (connectFrom && connectTo && !isUturn) {
-               return 'restriction';
-             }
+           return this;
+         };
+         /**
+          * Returns array of keys
+          */
 
-             if (connectFrom && connectVia) {
-               return 'restriction';
-             }
 
-             if (connectTo && connectVia) {
-               return 'restriction';
-             } // connecting to a key node -
-             // if both nodes are on a member way (i.e. part of the turn restriction),
-             // the connecting node must be adjacent to the key node.
+         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
+          */
 
 
-             if (connectKeyFrom || connectKeyTo) {
-               if (nodeIDs.length !== 2) {
-                 return 'restriction';
-               }
+         Tree.prototype.values = function () {
+           var values = [];
+           this.forEach(function (_a) {
+             var data = _a.data;
+             return values.push(data);
+           });
+           return values;
+         };
 
-               var n0 = null;
-               var n1 = null;
+         Tree.prototype.min = function () {
+           if (this._root) return this.minNode(this._root).key;
+           return null;
+         };
 
-               for (j = 0; j < memberWays.length; j++) {
-                 way = memberWays[j];
+         Tree.prototype.max = function () {
+           if (this._root) return this.maxNode(this._root).key;
+           return null;
+         };
 
-                 if (way.contains(nodeIDs[0])) {
-                   n0 = nodeIDs[0];
-                 }
+         Tree.prototype.minNode = function (t) {
+           if (t === void 0) {
+             t = this._root;
+           }
 
-                 if (way.contains(nodeIDs[1])) {
-                   n1 = nodeIDs[1];
-                 }
-               }
+           if (t) while (t.left) {
+             t = t.left;
+           }
+           return t;
+         };
 
-               if (n0 && n1) {
-                 // both nodes are part of the restriction
-                 var ok = false;
+         Tree.prototype.maxNode = function (t) {
+           if (t === void 0) {
+             t = this._root;
+           }
 
-                 for (j = 0; j < memberWays.length; j++) {
-                   way = memberWays[j];
+           if (t) while (t.right) {
+             t = t.right;
+           }
+           return t;
+         };
+         /**
+          * Returns node at given index
+          */
 
-                   if (way.areAdjacent(n0, n1)) {
-                     ok = true;
-                     break;
-                   }
-                 }
 
-                 if (!ok) {
-                   return 'restriction';
-                 }
-               }
-             } // 2b. disable if nodes being connected will destroy a member way in a restriction
-             // (to test, make a copy and try actually connecting the nodes)
+         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;
+             }
+           }
 
-             for (j = 0; j < memberWays.length; j++) {
-               way = memberWays[j].update({}); // make copy
+           return null;
+         };
 
-               for (k = 0; k < nodeIDs.length; k++) {
-                 if (nodeIDs[k] === survivor.id) continue;
+         Tree.prototype.next = function (d) {
+           var root = this._root;
+           var successor = null;
 
-                 if (way.areAdjacent(nodeIDs[k], survivor.id)) {
-                   way = way.removeNode(nodeIDs[k]);
-                 } else {
-                   way = way.replaceNode(nodeIDs[k], survivor.id);
-                 }
-               }
+           if (d.right) {
+             successor = d.right;
 
-               if (way.isDegenerate()) {
-                 return 'restriction';
-               }
+             while (successor.left) {
+               successor = successor.left;
              }
+
+             return successor;
            }
 
-           return false; // if a key node appears multiple times (indexOf !== lastIndexOf) it's a FROM-VIA or TO-VIA junction
+           var comparator = this._comparator;
 
-           function hasDuplicates(n, i, arr) {
-             return arr.indexOf(n) !== arr.lastIndexOf(n);
+           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;
            }
 
-           function keyNodeFilter(froms, tos) {
-             return function (n) {
-               return froms.indexOf(n) === -1 && tos.indexOf(n) === -1;
-             };
-           }
+           return successor;
+         };
 
-           function collectNodes(member, collection) {
-             var entity = graph.hasEntity(member.id);
-             if (!entity) return;
-             var role = member.role || '';
+         Tree.prototype.prev = function (d) {
+           var root = this._root;
+           var predecessor = null;
 
-             if (!collection[role]) {
-               collection[role] = [];
-             }
+           if (d.left !== null) {
+             predecessor = d.left;
 
-             if (member.type === 'node') {
-               collection[role].push(member.id);
+             while (predecessor.right) {
+               predecessor = predecessor.right;
+             }
 
-               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);
+             return predecessor;
+           }
 
-               if (role === 'from' || role === 'via') {
-                 collection.keyfrom.push(entity.first());
-                 collection.keyfrom.push(entity.last());
-               }
+           var comparator = this._comparator;
 
-               if (role === 'to' || role === 'via') {
-                 collection.keyto.push(entity.first());
-                 collection.keyto.push(entity.last());
-               }
+           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;
          };
 
-         return action;
-       }
+         Tree.prototype.clear = function () {
+           this._root = null;
+           this._size = 0;
+           return this;
+         };
 
-       function actionCopyEntities(ids, fromGraph) {
-         var _copies = {};
+         Tree.prototype.toList = function () {
+           return toList(this._root);
+         };
+         /**
+          * Bulk-load items. Both array have to be same size
+          */
 
-         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]);
+         Tree.prototype.load = function (keys, values, presort) {
+           if (values === void 0) {
+             values = [];
            }
 
-           return graph;
-         };
+           if (presort === void 0) {
+             presort = false;
+           }
 
-         action.copies = function () {
-           return _copies;
-         };
+           var size = keys.length;
+           var comparator = this._comparator; // sort if needed
 
-         return action;
-       }
+           if (presort) sort(keys, values, 0, size - 1, comparator);
 
-       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;
+           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;
          };
-       }
 
-       function actionDiscardTags(difference, discardTags) {
-         discardTags = discardTags || {};
-         return function (graph) {
-           difference.modified().forEach(checkTags);
-           difference.created().forEach(checkTags);
-           return graph;
+         Tree.prototype.isEmpty = function () {
+           return this._root === null;
+         };
 
-           function checkTags(entity) {
-             var keys = Object.keys(entity.tags);
-             var didDiscard = false;
-             var tags = {};
+         Object.defineProperty(Tree.prototype, "size", {
+           get: function get() {
+             return this._size;
+           },
+           enumerable: true,
+           configurable: true
+         });
+         Object.defineProperty(Tree.prototype, "root", {
+           get: function get() {
+             return this._root;
+           },
+           enumerable: true,
+           configurable: true
+         });
 
-             for (var i = 0; i < keys.length; i++) {
-               var k = keys[i];
+         Tree.prototype.toString = function (printNode) {
+           if (printNode === void 0) {
+             printNode = function printNode(n) {
+               return String(n.key);
+             };
+           }
 
-               if (discardTags[k] || !entity.tags[k]) {
-                 didDiscard = true;
-               } else {
-                 tags[k] = entity.tags[k];
-               }
-             }
+           var out = [];
+           printRow(this._root, '', true, function (v) {
+             return out.push(v);
+           }, printNode);
+           return out.join('');
+         };
 
-             if (didDiscard) {
-               graph = graph.replace(entity.update({
-                 tags: tags
-               }));
-             }
+         Tree.prototype.update = function (key, newKey, newData) {
+           var comparator = this._comparator;
+
+           var _a = split(key, this._root, comparator),
+               left = _a.left,
+               right = _a.right;
+
+           if (comparator(key, newKey) < 0) {
+             right = insert(newKey, newData, right, comparator);
+           } else {
+             left = insert(newKey, newData, left, comparator);
            }
+
+           this._root = merge$3(left, right, comparator);
          };
-       }
 
-       //
-       // 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
-       //
+         Tree.prototype.split = function (key) {
+           return split(key, this._root, this._comparator);
+         };
 
-       function actionDisconnect(nodeId, newNodeId) {
-         var wayIds;
+         return Tree;
+       }();
 
-         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 loadRecursive(keys, values, start, end) {
+         var size = end - start;
 
-             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 (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;
+         }
 
-         action.connections = function (graph) {
-           var candidates = [];
-           var keeping = false;
-           var parentWays = graph.parentWays(graph.entity(nodeId));
-           var way, waynode;
+         return null;
+       }
 
-           for (var i = 0; i < parentWays.length; i++) {
-             way = parentWays[i];
+       function createList(keys, values) {
+         var head = new Node(null, null);
+         var p = head;
 
-             if (wayIds && wayIds.indexOf(way.id) === -1) {
-               keeping = true;
-               continue;
-             }
+         for (var i = 0; i < keys.length; i++) {
+           p = p.next = new Node(keys[i], values[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];
+         p.next = null;
+         return head.next;
+       }
 
-                 if (waynode === nodeId) {
-                   if (way.isClosed() && parentWays.length > 1 && wayIds && wayIds.indexOf(way.id) !== -1 && j === way.nodes.length - 1) {
-                     continue;
-                   }
+       function toList(root) {
+         var current = root;
+         var Q = [];
+         var done = false;
+         var head = new Node(null, null);
+         var p = head;
 
-                   candidates.push({
-                     wayID: way.id,
-                     index: j
-                   });
-                 }
-               }
-             }
+         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;
            }
+         }
 
-           return keeping ? candidates : candidates.slice(1);
-         };
+         p.next = null; // that'll work even if the tree was empty
 
-         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';
-         };
+         return head.next;
+       }
 
-         action.limitWays = function (val) {
-           if (!arguments.length) return wayIds;
-           wayIds = val;
-           return action;
-         };
+       function sortedListToBST(list, start, end) {
+         var size = end - start;
 
-         return action;
+         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;
        }
 
-       var geojsonRewind = rewind;
+       function mergeLists(l1, l2, compare) {
+         var head = new Node(null, null); // dummy
 
-       function rewind(gj, outer) {
-         var type = gj && gj.type,
-             i;
+         var p = head;
+         var p1 = l1;
+         var p2 = l2;
 
-         if (type === 'FeatureCollection') {
-           for (i = 0; i < gj.features.length; i++) {
-             rewind(gj.features[i], outer);
-           }
-         } else if (type === 'GeometryCollection') {
-           for (i = 0; i < gj.geometries.length; i++) {
-             rewind(gj.geometries[i], outer);
-           }
-         } else if (type === 'Feature') {
-           rewind(gj.geometry, outer);
-         } else if (type === 'Polygon') {
-           rewindRings(gj.coordinates, outer);
-         } else if (type === 'MultiPolygon') {
-           for (i = 0; i < gj.coordinates.length; i++) {
-             rewindRings(gj.coordinates[i], outer);
+         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 gj;
+         return head.next;
        }
 
-       function rewindRings(rings, outer) {
-         if (rings.length === 0) return;
-         rewindRing(rings[0], outer);
+       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);
 
-         for (var i = 1; i < rings.length; i++) {
-           rewindRing(rings[i], !outer);
+           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 rewindRing(ring, dir) {
-         var area = 0;
+       function _classCallCheck(instance, Constructor) {
+         if (!(instance instanceof Constructor)) {
+           throw new TypeError("Cannot call a class as a function");
+         }
+       }
 
-         for (var i = 0, len = ring.length, j = len - 1; i < len; j = i++) {
-           area += (ring[i][0] - ring[j][0]) * (ring[j][1] + ring[i][1]);
+       function _defineProperties(target, props) {
+         for (var i = 0; i < props.length; i++) {
+           var descriptor = props[i];
+           descriptor.enumerable = descriptor.enumerable || false;
+           descriptor.configurable = true;
+           if ("value" in descriptor) descriptor.writable = true;
+           Object.defineProperty(target, descriptor.key, descriptor);
          }
+       }
 
-         if (area >= 0 !== !!dir) ring.reverse();
+       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 } }
+        *
+        */
 
-       function actionExtract(entityID) {
-         var extractedNodeID;
 
-         var action = function action(graph) {
-           var entity = graph.entity(entityID);
+       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
+           },
+           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 (entity.type === 'node') {
-             return extractFromNode(entity, graph);
-           }
+       if (epsilon === undefined) epsilon = Math.pow(2, -52);
+       var EPSILON_SQ = epsilon * epsilon;
+       /* FLP comparator */
 
-           return extractFromWayOrRelation(entity, graph);
-         };
+       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
 
-         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
+         var ab = a - b;
 
-           graph = graph.parentWays(node).reduce(function (accGraph, parentWay) {
-             return accGraph.replace(parentWay.replaceNode(entityID, replacement.id));
-           }, graph); // Process any relations too
+         if (ab * ab < EPSILON_SQ * a * b) {
+           return 0;
+         } // normal comparison
 
-           return graph.parentRelations(node).reduce(function (accGraph, parentRel) {
-             return accGraph.replace(parentRel.replaceMember(node, replacement));
-           }, graph);
-         }
 
-         function extractFromWayOrRelation(entity, graph) {
-           var fromGeometry = entity.geometry(graph);
-           var keysToCopyAndRetain = ['source', 'wheelchair'];
-           var keysToRetain = ['area'];
-           var buildingKeysToRetain = ['architect', 'building', 'height', 'layer']; // d3_geoCentroid is wrong for counterclockwise-wound polygons, so wind them clockwise
+         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 extractedLoc = d3_geoCentroid(geojsonRewind(Object.assign({}, entity.asGeoJSON(graph)), true));
 
-           if (!extractedLoc || !isFinite(extractedLoc[0]) || !isFinite(extractedLoc[1])) {
-             extractedLoc = entity.extent(graph).center();
-           }
+       var PtRounder = /*#__PURE__*/function () {
+         function PtRounder() {
+           _classCallCheck(this, PtRounder);
 
-           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
+           this.reset();
+         }
 
-           var pointTags = {};
+         _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)
+             };
+           }
+         }]);
 
-           for (var key in entityTags) {
-             if (entity.type === 'relation' && key === 'type') {
-               continue;
-             }
+         return PtRounder;
+       }();
 
-             if (keysToRetain.indexOf(key) !== -1) {
-               continue;
-             }
+       var CoordRounder = /*#__PURE__*/function () {
+         function CoordRounder() {
+           _classCallCheck(this, CoordRounder);
 
-             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
+           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).
 
-             if (isIndoorArea && key === 'indoor') {
-               continue;
-             } // copy the tag from the entity to the point
 
+         _createClass(CoordRounder, [{
+           key: "round",
+           value: function round(coord) {
+             var node = this.tree.add(coord);
+             var prevNode = this.tree.prev(node);
 
-             pointTags[key] = entityTags[key]; // leave addresses and some other tags so they're on both features
+             if (prevNode !== null && cmp(node.key, prevNode.key) === 0) {
+               this.tree.remove(coord);
+               return prevNode.key;
+             }
 
-             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 nextNode = this.tree.next(node);
 
+             if (nextNode !== null && cmp(node.key, nextNode.key) === 0) {
+               this.tree.remove(coord);
+               return nextNode.key;
+             }
 
-             delete entityTags[key];
+             return coord;
            }
+         }]);
 
-           if (!isBuilding && !isIndoorArea && fromGeometry === 'area') {
-             // ensure that areas keep area geometry
-             entityTags.area = 'yes';
-           }
+         return CoordRounder;
+       }(); // singleton available by import
 
-           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;
-         };
+       var rounder = new PtRounder();
+       /* Cross Product of two vectors with first point at origin */
 
-         return action;
-       }
+       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 */
 
-       //
-       // This is the inverse of `iD.actionSplit`.
-       //
-       // Reference:
-       //   https://github.com/systemed/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/MergeWaysAction.as
-       //   https://github.com/openstreetmap/josm/blob/mirror/src/org/openstreetmap/josm/actions/CombineWayAction.java
-       //
 
-       function actionJoin(ids) {
-         function groupEntitiesByGeometry(graph) {
-           var entities = ids.map(function (id) {
-             return graph.entity(id);
-           });
-           return Object.assign({
-             line: []
-           }, utilArrayGroupBy(entities, function (entity) {
-             return entity.geometry(graph);
-           }));
-         }
+       var dotProduct = function dotProduct(a, b) {
+         return a.x * b.x + a.y * b.y;
+       };
+       /* Comparator for two vectors with same starting point */
 
-         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
 
-           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 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);
+       };
 
-           for (var i = 0; i < ways.length; i++) {
-             if (!ways[i].isNew()) {
-               survivorID = ways[i].id;
-               break;
-             }
-           }
+       var length = function length(v) {
+         return Math.sqrt(dotProduct(v, v));
+       };
+       /* Get the sine of the angle from pShared -> pAngle to pShaed -> pBase */
 
-           var sequences = osmJoinWays(ways, graph);
-           var joined = sequences[0]; // We might need to reverse some of these ways before joining them.  #4688
-           // `joined.actions` property will contain any actions we need to apply.
 
-           graph = sequences.actions.reduce(function (g, action) {
-             return action(g);
-           }, graph);
-           var survivor = graph.entity(survivorID);
-           survivor = survivor.update({
-             nodes: joined.nodes.map(function (n) {
-               return n.id;
-             })
-           });
-           graph = graph.replace(survivor);
-           joined.forEach(function (way) {
-             if (way.id === survivorID) return;
-             graph.parentRelations(way).forEach(function (parent) {
-               graph = graph.replace(parent.replaceMember(way, survivor));
-             });
-             survivor = survivor.mergeTags(way.tags);
-             graph = graph.replace(survivor);
-             graph = actionDeleteWay(way.id)(graph);
-           }); // Finds if the join created a single-member multipolygon,
-           // and if so turns it into a basic area instead
+       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 */
 
-           function checkForSimpleMultipolygon() {
-             if (!survivor.isClosed()) return;
-             var multipolygons = graph.parentMultipolygons(survivor).filter(function (multipolygon) {
-               // find multipolygons where the survivor is the only member
-               return multipolygon.members.length === 1;
-             }); // skip if this is the single member of multiple multipolygons
 
-             if (multipolygons.length !== 1) return;
-             var multipolygon = multipolygons[0];
+       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. */
 
-             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);
+       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. */
 
-             if (survivor.geometry(graph) !== 'area') {
-               // ensure the feature persists as an area
-               tags.area = 'yes';
-             }
 
-             delete tags.type; // remove type=multipolygon
+       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. */
 
-             survivor = survivor.update({
-               tags: tags
-             });
-             graph = graph.replace(survivor);
-           }
 
-           checkForSimpleMultipolygon();
-           return graph;
-         }; // Returns the number of nodes the resultant way is expected to have
+       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
 
-         action.resultingWayNodesLength = function (graph) {
-           return ids.reduce(function (count, id) {
-             return count + graph.entity(id).nodes.length;
-           }, 0) - ids.length - 1;
+         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
          };
+       };
 
-         action.disabled = function (graph) {
-           var geometries = groupEntitiesByGeometry(graph);
+       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 (ids.length < 2 || ids.length !== geometries.line.length) {
-             return 'not_eligible';
-           }
+             if (a.point !== b.point) a.link(b); // favor right events over left
 
-           var joined = osmJoinWays(ids.map(graph.entity, graph), graph);
+             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 (joined.length > 1) {
-             return 'not_adjacent';
-           } // Loop through all combinations of path-pairs
-           // to check potential intersections between all pairs
+             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)
 
-           for (var i = 0; i < ids.length - 1; i++) {
-             for (var j = i + 1; j < ids.length; j++) {
-               var path1 = graph.childNodes(graph.entity(ids[i])).map(function (e) {
-                 return e.loc;
-               });
-               var path2 = graph.childNodes(graph.entity(ids[j])).map(function (e) {
-                 return e.loc;
-               });
-               var intersections = geoPathIntersections(path1, path2); // Check if intersections are just nodes lying on top of
-               // each other/the line, as opposed to crossing it
+         }]);
 
-               var common = utilArrayIntersection(joined[0].nodes.map(function (n) {
-                 return n.loc.toString();
-               }), intersections.map(function (n) {
-                 return n.toString();
-               }));
+         function SweepEvent(point, isLeft) {
+           _classCallCheck(this, SweepEvent);
 
-               if (common.length !== intersections.length) {
-                 return 'paths_intersect';
-               }
+           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 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;
-               }
-             });
+             var otherEvents = other.point.events;
 
-             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;
-               }
+             for (var i = 0, iMax = otherEvents.length; i < iMax; i++) {
+               var evt = otherEvents[i];
+               this.point.events.push(evt);
+               evt.point = this.point;
              }
-           });
-
-           if (relation) {
-             return 'restriction';
-           }
 
-           if (conflicting) {
-             return 'conflicting_tags';
+             this.checkForConsuming();
            }
-         };
-
-         return action;
-       }
-
-       function actionMerge(ids) {
-         function groupEntitiesByGeometry(graph) {
-           var entities = ids.map(function (id) {
-             return graph.entity(id);
-           });
-           return Object.assign({
-             point: [],
-             area: [],
-             line: [],
-             relation: []
-           }, utilArrayGroupBy(entities, function (entity) {
-             return entity.geometry(graph);
-           }));
-         }
+           /* Do a pass over our linked events and check to see if any pair
+            * of segments match, and should be consumed. */
 
-         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;
+         }, {
+           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 < nodes.length; i++) {
-               var node = nodes[i];
+             for (var i = 0; i < numEvents; i++) {
+               var evt1 = this.point.events[i];
+               if (evt1.segment.consumedBy !== undefined) continue;
 
-               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
+               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];
 
-               graph = graph.replace(point.update({
-                 tags: {},
-                 loc: node.loc
-               }));
-               target = target.replaceNode(node.id, point.id);
-               graph = graph.replace(target);
-               removeNode = node;
-               break;
+               if (evt !== this && !evt.segment.ringOut && evt.segment.isInResult()) {
+                 events.push(evt);
+               }
              }
 
-             graph = graph.remove(removeNode);
-           });
+             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.
+            */
 
-           if (target.tags.area === 'yes') {
-             var tags = Object.assign({}, target.tags); // shallow copy
+         }, {
+           key: "getLeftmostComparator",
+           value: function getLeftmostComparator(baseEvent) {
+             var _this = this;
 
-             delete tags.area;
+             var cache = new Map();
 
-             if (osmTagSuggestingArea(tags)) {
-               // remove the `area` tag if area geometry is now implied - #3851
-               target = target.update({
-                 tags: tags
+             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)
                });
-               graph = graph.replace(target);
-             }
-           }
+             };
 
-           return graph;
-         };
+             return function (a, b) {
+               if (!cache.has(a)) fillCache(a);
+               if (!cache.has(b)) fillCache(b);
 
-         action.disabled = function (graph) {
-           var geometries = groupEntitiesByGeometry(graph);
+               var _cache$get = cache.get(a),
+                   asine = _cache$get.sine,
+                   acosine = _cache$get.cosine;
 
-           if (geometries.point.length === 0 || geometries.area.length + geometries.line.length !== 1 || geometries.relation.length !== 0) {
-             return 'not_eligible';
-           }
-         };
+               var _cache$get2 = cache.get(b),
+                   bsine = _cache$get2.sine,
+                   bcosine = _cache$get2.cosine; // both on or above x-axis
 
-         return action;
-       }
 
-       //
-       // 1. move all the nodes to a common location
-       // 2. `actionConnect` them
+               if (asine >= 0 && bsine >= 0) {
+                 if (acosine < bcosine) return 1;
+                 if (acosine > bcosine) return -1;
+                 return 0;
+               } // both below x-axis
 
-       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 (asine < 0 && bsine < 0) {
+                 if (acosine < bcosine) return -1;
+                 if (acosine > bcosine) return 1;
+                 return 0;
+               } // one above x-axis, one below
 
-             if (node.hasInterestingTags()) {
-               interestingLoc = ++interestingCount === 1 ? node.loc : null;
-             }
 
-             sum = geoVecAdd(sum, node.loc);
+               if (bsine < asine) return -1;
+               if (bsine > asine) return 1;
+               return 0;
+             };
            }
+         }]);
 
-           return interestingLoc || geoVecScale(sum, 1 / nodeIDs.length);
-         }
+         return SweepEvent;
+       }(); // segments and sweep events when all else is identical
 
-         var action = function action(graph) {
-           if (nodeIDs.length < 2) return graph;
-           var toLoc = loc;
 
-           if (!toLoc) {
-             toLoc = chooseLoc(graph);
-           }
+       var segmentId = 0;
 
-           for (var i = 0; i < nodeIDs.length; i++) {
-             var node = graph.entity(nodeIDs[i]);
+       var Segment = /*#__PURE__*/function () {
+         _createClass(Segment, null, [{
+           key: "compare",
 
-             if (node.loc !== toLoc) {
-               graph = graph.replace(node.move(toLoc));
-             }
-           }
+           /* 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
 
-           return actionConnect(nodeIDs)(graph);
-         };
+             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?
 
-         action.disabled = function (graph) {
-           if (nodeIDs.length < 2) return 'not_eligible';
+             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?
 
-           for (var i = 0; i < nodeIDs.length; i++) {
-             var entity = graph.entity(nodeIDs[i]);
-             if (entity.type !== 'node') return 'not_eligible';
-           }
+               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 ?
 
-           return actionConnect(nodeIDs).disabled(graph);
-         };
+               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 action;
-       }
+               return -1;
+             } // is left endpoint of segment A the right-more?
 
-       function osmChangeset() {
-         if (!(this instanceof osmChangeset)) {
-           return new osmChangeset().initialize(arguments);
-         } else if (arguments.length) {
-           this.initialize(arguments);
-         }
-       }
-       osmEntity.changeset = osmChangeset;
-       osmChangeset.prototype = Object.create(osmEntity.prototype);
-       Object.assign(osmChangeset.prototype, {
-         type: 'changeset',
-         extent: function extent() {
-           return new geoExtent();
-         },
-         geometry: function geometry() {
-           return 'changeset';
-         },
-         asJXON: function asJXON() {
-           return {
-             osm: {
-               changeset: {
-                 tag: Object.keys(this.tags).map(function (k) {
-                   return {
-                     '@k': k,
-                     '@v': this.tags[k]
-                   };
-                 }, this),
-                 '@version': 0.6,
-                 '@generator': 'iD'
-               }
-             }
-           };
-         },
-         // Generate [osmChange](http://wiki.openstreetmap.org/wiki/OsmChange)
-         // XML. Returns a string.
-         osmChangeJXON: function osmChangeJXON(changes) {
-           var changeset_id = this.id;
 
-           function nest(x, order) {
-             var groups = {};
+             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?
 
-             for (var i = 0; i < x.length; i++) {
-               var tagName = Object.keys(x[i])[0];
-               if (!groups[tagName]) groups[tagName] = [];
-               groups[tagName].push(x[i][tagName]);
-             }
+               var bCmpALeft = b.comparePoint(a.leftSE.point);
+               if (bCmpALeft !== 0) return bCmpALeft; // is the B right endpoint colinear to segment A?
 
-             var ordered = {};
-             order.forEach(function (o) {
-               if (groups[o]) ordered[o] = groups[o];
-             });
-             return ordered;
-           } // sort relations in a changeset by dependencies
+               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
 
-           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
 
+             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?
 
-             function isNew(item) {
-               return !sorted[item['@id']] && !processing.find(function (proc) {
-                 return proc['@id'] === item['@id'];
-               });
+             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;
              }
 
-             var processing = [];
-             var sorted = {};
-             var relations = changes.relation;
-             if (!relations) return changes;
+             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
 
-             for (var i = 0; i < relations.length; i++) {
-               var relation = relations[i]; // skip relation if already sorted
 
-               if (!sorted[relation['@id']]) {
-                 processing.push(relation);
-               }
+             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
 
-               while (processing.length > 0) {
-                 var next = processing[0],
-                     deps = next.member.map(resolve).filter(Boolean).filter(isNew);
+             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 (deps.length === 0) {
-                   sorted[next['@id']] = next;
-                   processing.shift();
-                 } else {
-                   processing = deps.concat(processing);
-                 }
-               }
-             }
+             if (a.id < b.id) return -1;
+             if (a.id > b.id) return 1; // identical segment, ie a === b
 
-             changes.relation = Object.values(sorted);
-             return changes;
+             return 0;
            }
+           /* Warning: a reference to ringWindings input will be stored,
+            *  and possibly will be later modified */
 
-           function rep(entity) {
-             return entity.asJXON(changeset_id);
-           }
+         }]);
 
-           return {
-             osmChange: {
-               '@version': 0.6,
-               '@generator': 'iD',
-               'create': sort(nest(changes.created.map(rep), ['node', 'way', 'relation'])),
-               'modify': nest(changes.modified.map(rep), ['node', 'way', 'relation']),
-               'delete': Object.assign(nest(changes.deleted.map(rep), ['relation', 'way', 'node']), {
-                 '@if-unused': true
-               })
-             }
-           };
-         },
-         asGeoJSON: function asGeoJSON() {
-           return {};
-         }
-       });
+         function Segment(leftSE, rightSE, rings, windings) {
+           _classCallCheck(this, Segment);
 
-       function osmNote() {
-         if (!(this instanceof osmNote)) {
-           return new osmNote().initialize(arguments);
-         } else if (arguments.length) {
-           this.initialize(arguments);
+           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
          }
-       }
-
-       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];
+         _createClass(Segment, [{
+           key: "replaceRightSE",
 
-             for (var prop in source) {
-               if (Object.prototype.hasOwnProperty.call(source, prop)) {
-                 if (source[prop] === undefined) {
-                   delete this[prop];
-                 } else {
-                   this[prop] = source[prop];
-                 }
+           /* 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 */
 
-           if (!this.id) {
-             this.id = osmNote.id().toString();
+         }, {
+           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)
+            */
 
-           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);
-
-       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();
+         }, {
+           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.
 
-             for (var i = 0; i < this.members.length; i++) {
-               var member = resolver.hasEntity(this.members[i].id);
+             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.
 
-               if (member) {
-                 extent._extend(member.extent(resolver, memo));
-               }
-             }
 
-             return extent;
-           });
-         },
-         geometry: function geometry(graph) {
-           return graph["transient"](this, 'geometry', function () {
-             return this.isMultipolygon() ? 'area' : 'relation';
-           });
-         },
-         isDegenerate: function isDegenerate() {
-           return this.members.length === 0;
-         },
-         // Return an array of members, each extended with an 'index' property whose value
-         // is the member index.
-         indexedMembers: function indexedMembers() {
-           var result = new Array(this.members.length);
+             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.
 
-           for (var i = 0; i < this.members.length; i++) {
-             result[i] = Object.assign({}, this.members[i], {
-               index: i
-             });
+             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.
 
-           return result;
-         },
-         // Return the first member with the given role. A copy of the member object
-         // is returned, extended with an 'index' property whose value is the member index.
-         memberByRole: function memberByRole(role) {
-           for (var i = 0; i < this.members.length; i++) {
-             if (this.members[i].role === role) {
-               return Object.assign({}, this.members[i], {
-                 index: i
-               });
-             }
-           }
-         },
-         // Same as memberByRole, but returns all members with the given role
-         membersByRole: function membersByRole(role) {
-           var result = [];
+             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
 
-           for (var i = 0; i < this.members.length; i++) {
-             if (this.members[i].role === role) {
-               result.push(Object.assign({}, this.members[i], {
-                 index: i
-               }));
-             }
-           }
+             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?
 
-           return result;
-         },
-         // Return the first member with the given id. A copy of the member object
-         // is returned, extended with an 'index' property whose value is the member index.
-         memberById: function memberById(id) {
-           for (var i = 0; i < this.members.length; i++) {
-             if (this.members[i].id === id) {
-               return Object.assign({}, this.members[i], {
-                 index: i
-               });
-             }
-           }
-         },
-         // Return the first member with the given id and role. A copy of the member object
-         // is returned, extended with an 'index' property whose value is the member index.
-         memberByIdAndRole: function memberByIdAndRole(id, role) {
-           for (var i = 0; i < this.members.length; i++) {
-             if (this.members[i].id === id && this.members[i].role === role) {
-               return Object.assign({}, this.members[i], {
-                 index: i
-               });
-             }
-           }
-         },
-         addMember: function addMember(member, index) {
-           var members = this.members.slice();
-           members.splice(index === undefined ? members.length : index, 0, member);
-           return this.update({
-             members: members
-           });
-         },
-         updateMember: function updateMember(member, index) {
-           var members = this.members.slice();
-           members.splice(index, 1, Object.assign({}, members[index], member));
-           return this.update({
-             members: members
-           });
-         },
-         removeMember: function removeMember(index) {
-           var members = this.members.slice();
-           members.splice(index, 1);
-           return this.update({
-             members: members
-           });
-         },
-         removeMembersWithID: function removeMembersWithID(id) {
-           var members = this.members.filter(function (m) {
-             return m.id !== id;
-           });
-           return this.update({
-             members: members
-           });
-         },
-         moveMember: function moveMember(fromIndex, toIndex) {
-           var members = this.members.slice();
-           members.splice(toIndex, 0, members.splice(fromIndex, 1)[0]);
-           return this.update({
-             members: members
-           });
-         },
-         // Wherever a member appears with id `needle.id`, replace it with a member
-         // with id `replacement.id`, type `replacement.type`, and the original role,
-         // By default, adding a duplicate member (by id and role) is prevented.
-         // Return an updated relation.
-         replaceMember: function replaceMember(needle, replacement, keepDuplicates) {
-           if (!this.memberById(needle.id)) return this;
-           var members = [];
+             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
 
-           for (var i = 0; i < this.members.length; i++) {
-             var member = this.members[i];
+               return null;
+             } // does this left endpoint matches (other doesn't)
 
-             if (member.id !== needle.id) {
-               members.push(member);
-             } else if (keepDuplicates || !this.memberByIdAndRole(replacement.id, member.role)) {
-               members.push({
-                 id: replacement.id,
-                 type: replacement.type,
-                 role: member.role
-               });
-             }
-           }
 
-           return this.update({
-             members: members
-           });
-         },
-         asJXON: function asJXON(changeset_id) {
-           var r = {
-             relation: {
-               '@id': this.osmId(),
-               '@version': this.version || 0,
-               member: this.members.map(function (member) {
-                 return {
-                   keyAttributes: {
-                     type: member.type,
-                     role: member.role,
-                     ref: osmEntity.id.toOSM(member.id)
-                   }
-                 };
-               }, this),
-               tag: Object.keys(this.tags).map(function (k) {
-                 return {
-                   keyAttributes: {
-                     k: k,
-                     v: this.tags[k]
-                   }
-                 };
-               }, this)
-             }
-           };
+             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
 
-           if (changeset_id) {
-             r.relation['@changeset'] = changeset_id;
-           }
 
-           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;
-             }
-           }
+               return tlp;
+             } // does other left endpoint matches (this doesn't)
 
-           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]);
-             }
+             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 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];
-           });
+               return olp;
+             } // trivial intersection on right endpoints
 
-           function findOuter(inner) {
-             var o, outer;
 
-             for (o = 0; o < outers.length; o++) {
-               outer = outers[o];
-               if (geoPolygonContainsPolygon(outer, inner)) return o;
-             }
+             if (touchesThisRSE && touchesOtherRSE) return null; // t-intersections on just one right endpoint
 
-             for (o = 0; o < outers.length; o++) {
-               outer = outers[o];
-               if (geoPolygonIntersectsPolygon(outer, inner, false)) return o;
-             }
-           }
+             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
 
-           for (var i = 0; i < inners.length; i++) {
-             var inner = inners[i];
+             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 (d3_geoArea({
-               type: 'Polygon',
-               coordinates: [inner]
-             }) < 2 * Math.PI) {
-               inner = inner.reverse();
-             }
+             if (pt === null) return null; // is the intersection found between the lines not on the segments?
 
-             var o = findOuter(inners[i]);
+             if (!isInBbox(bboxOverlap, pt)) return null; // round the the computed point if needed
 
-             if (o !== undefined) {
-               result[o].push(inners[i]);
-             } else {
-               result.push([inners[i]]); // Invalid geometry
-             }
+             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
+            */
 
-           return result;
-         }
-       });
+         }, {
+           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
 
-       var QAItem = /*#__PURE__*/function () {
-         function QAItem(loc, service, itemType, id, props) {
-           _classCallCheck(this, QAItem);
+             if (SweepEvent.comparePoints(newSeg.leftSE.point, newSeg.rightSE.point) > 0) {
+               newSeg.swapEvents();
+             }
 
-           // 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
+             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
 
-           this.id = id ? id : "".concat(QAItem.id());
-           this.update(props); // Some QA services have marker icons to differentiate issues
 
-           if (service && typeof service.getIcon === 'function') {
-             this.icon = service.getIcon(itemType);
-           }
-         }
+             if (alreadyLinked) {
+               newLeftSE.checkForConsuming();
+               newRightSE.checkForConsuming();
+             }
 
-         _createClass(QAItem, [{
-           key: "update",
-           value: function update(props) {
-             var _this = this;
+             return newEvents;
+           }
+           /* Swap which event is left and right */
 
-             // 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: "swapEvents",
+           value: function swapEvents() {
+             var tmpEvt = this.rightSE;
+             this.rightSE = this.leftSE;
+             this.leftSE = tmpEvt;
+             this.leftSE.isLeft = true;
+             this.rightSE.isLeft = false;
 
-         }], [{
-           key: "id",
-           value: function id() {
-             return this.nextId--;
+             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 */
 
-         return QAItem;
-       }();
-       QAItem.nextId = -1;
+         }, {
+           key: "consume",
+           value: function consume(other) {
+             var consumer = this;
+             var consumee = other;
 
-       //
-       // 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
-       //
+             while (consumer.consumedBy) {
+               consumer = consumer.consumedBy;
+             }
 
-       function actionSplit(nodeIds, newWayIds) {
-         // accept single ID for backwards-compatiblity
-         if (typeof nodeIds === 'string') nodeIds = [nodeIds];
+             while (consumee.consumedBy) {
+               consumee = consumee.consumedBy;
+             }
 
-         var _wayIDs; // the strategy for picking which way will have a new version and which way is newly created
+             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
 
-         var _keepHistoryOn = 'longest'; // 'longest', 'first'
-         // The IDs of the ways actually created by running this action
 
-         var _createdWayIDs = [];
+             if (consumer.prev === consumee) {
+               var _tmp = consumer;
+               consumer = consumee;
+               consumee = _tmp;
+             }
 
-         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.
+             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;
+             }
 
-         function splitArea(nodes, idxA, graph) {
-           var lengths = new Array(nodes.length);
-           var length;
-           var i;
-           var best = 0;
-           var idxB;
+             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
 
-           function wrap(index) {
-             return utilWrap(index, nodes.length);
-           } // calculate lengths
+             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
 
-           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;
-           }
+             var polysAfter = [];
+             var polysExclude = [];
 
-           length = 0;
+             for (var _i = 0, _iMax = ringsAfter.length; _i < _iMax; _i++) {
+               if (windingsAfter[_i] === 0) continue; // non-zero rule
 
-           for (i = wrap(idxA - 1); i !== idxA; i = wrap(i - 1)) {
-             length += dist(graph, nodes[i], nodes[wrap(i + 1)]);
+               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);
 
-             if (length < lengths[i]) {
-               lengths[i] = length;
-             }
-           } // determine best opposite node to split
+                 var _index = polysAfter.indexOf(_ring.poly);
 
+                 if (_index !== -1) polysAfter.splice(_index, 1);
+               }
+             } // calculate multiPolysAfter
 
-           for (i = 0; i < nodes.length; i++) {
-             var cost = lengths[i] / dist(graph, nodes[idxA], nodes[i]);
 
-             if (cost > best) {
-               idxB = i;
-               best = cost;
+             for (var _i2 = 0, _iMax2 = polysAfter.length; _i2 < _iMax2; _i2++) {
+               var mp = polysAfter[_i2].multiPoly;
+               if (mpsAfter.indexOf(mp) === -1) mpsAfter.push(mp);
              }
-           }
-
-           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 this._afterState;
            }
+           /* Is this segment part of the final result? */
 
-           return totalLength;
-         }
+         }, {
+           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;
 
-         function split(graph, nodeId, wayA, newWayId) {
-           var wayB = osmWay({
-             id: newWayId,
-             tags: wayA.tags
-           }); // `wayB` is the NEW way
+             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;
+                 }
 
-           var origNodes = wayA.nodes.slice();
-           var nodesA;
-           var nodesB;
-           var isArea = wayA.isArea();
-           var isOuter = osmIsOldMultipolygonOuterMember(wayA, graph);
+               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 (wayA.isClosed()) {
-             var nodes = wayA.nodes.slice(0, -1);
-             var idxA = nodes.indexOf(nodeId);
-             var idxB = splitArea(nodes, idxA, graph);
+                   if (mpsBefore.length < mpsAfter.length) {
+                     least = mpsBefore.length;
+                     most = mpsAfter.length;
+                   } else {
+                     least = mpsAfter.length;
+                     most = mpsBefore.length;
+                   }
 
-             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);
-           }
+                   this._isInResult = most === operation.numMultiPolys && least < most;
+                   break;
+                 }
 
-           var lengthA = totalLengthBetweenNodes(graph, nodesA);
-           var lengthB = totalLengthBetweenNodes(graph, nodesB);
+               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;
+                 }
 
-           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
-             });
-           }
+               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;
+                   };
 
-           if (wayA.tags.step_count) {
-             // divide up the the step count proportionally between the two ways
-             var stepCount = parseFloat(wayA.tags.step_count);
+                   this._isInResult = isJustSubject(mpsBefore) !== isJustSubject(mpsAfter);
+                   break;
+                 }
 
-             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
-               });
+               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
 
-           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
+             var cmpPts = SweepEvent.comparePoints(pt1, pt2);
 
-             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 (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, "]"));
 
-               if (f.id === wayA.id || t.id === wayA.id) {
-                 var keepB = false;
+             var leftSE = new SweepEvent(leftPt, true);
+             var rightSE = new SweepEvent(rightPt, false);
+             return new Segment(leftSE, rightSE, [ring], [winding]);
+           }
+         }]);
 
-                 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 Segment;
+       }();
 
-                       if (wayVia && utilArrayIntersection(wayB.nodes, wayVia.nodes).length) {
-                         keepB = true;
-                         break;
-                       }
-                     }
-                   }
-                 }
+       var RingIn = /*#__PURE__*/function () {
+         function RingIn(geomRing, poly, isExterior) {
+           _classCallCheck(this, RingIn);
 
-                 if (keepB) {
-                   relation = relation.replaceMember(wayA, wayB);
-                   graph = graph.replace(relation);
-                 } // 2. split a VIA
+           if (!Array.isArray(geomRing) || geomRing.length === 0) {
+             throw new Error('Input geometry is not a valid Polygon or 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)
+           this.poly = poly;
+           this.isExterior = isExterior;
+           this.segments = [];
 
-             } else {
-               if (relation === isOuter) {
-                 graph = graph.replace(relation.mergeTags(wayA.tags));
-                 graph = graph.replace(wayA.update({
-                   tags: {}
-                 }));
-                 graph = graph.replace(wayB.update({
-                   tags: {}
-                 }));
-               }
+           if (typeof geomRing[0][0] !== 'number' || typeof geomRing[0][1] !== 'number') {
+             throw new Error('Input geometry is not a valid Polygon or MultiPolygon');
+           }
 
-               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);
+           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;
 
-           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: {}
-             }));
-           }
+           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');
+             }
 
-           _createdWayIDs.push(wayB.id);
+             var point = rounder.round(geomRing[i][0], geomRing[i][1]); // skip repeated points
 
-           return graph;
-         }
+             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
 
-         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);
+           if (firstPoint.x !== prevPoint.x || firstPoint.y !== prevPoint.y) {
+             this.segments.push(Segment.fromRing(prevPoint, firstPoint, this));
+           }
+         }
 
-             for (var j = 0; j < candidates.length; j++) {
-               graph = split(graph, nodeId, candidates[j], newWayIds && newWayIds[newWayIndex]);
-               newWayIndex += 1;
+         _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 graph;
-         };
+         return RingIn;
+       }();
 
-         action.getCreatedWayIDs = function () {
-           return _createdWayIDs;
-         };
+       var PolyIn = /*#__PURE__*/function () {
+         function PolyIn(geomPoly, multiPoly) {
+           _classCallCheck(this, PolyIn);
 
-         action.waysForNode = function (nodeId, graph) {
-           var node = graph.entity(nodeId);
-           var splittableParents = graph.parentWays(node).filter(isSplittable);
+           if (!Array.isArray(geomPoly)) {
+             throw new Error('Input geometry is not a valid Polygon or MultiPolygon');
+           }
 
-           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';
-             });
+           this.exteriorRing = new RingIn(geomPoly[0], this, true); // copy by value
 
-             if (hasLine) {
-               return splittableParents.filter(function (parent) {
-                 return parent.geometry(graph) === 'line';
-               });
+           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);
            }
 
-           return splittableParents;
+           this.multiPoly = multiPoly;
+         }
 
-           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...
+         _createClass(PolyIn, [{
+           key: "getSweepEvents",
+           value: function getSweepEvents() {
+             var sweepEvents = this.exteriorRing.getSweepEvents();
 
-             if (parent.isClosed()) return true; // otherwise, we can't split nodes at their endpoints.
+             for (var i = 0, iMax = this.interiorRings.length; i < iMax; i++) {
+               var ringSweepEvents = this.interiorRings[i].getSweepEvents();
 
-             for (var i = 1; i < parent.nodes.length - 1; i++) {
-               if (parent.nodes[i] === nodeId) return true;
+               for (var j = 0, jMax = ringSweepEvents.length; j < jMax; j++) {
+                 sweepEvents.push(ringSweepEvents[j]);
+               }
              }
 
-             return false;
+             return sweepEvents;
            }
-         };
+         }]);
 
-         action.ways = function (graph) {
-           return utilArrayUniq([].concat.apply([], nodeIds.map(function (nodeId) {
-             return action.waysForNode(nodeId, graph);
-           })));
-         };
+         return PolyIn;
+       }();
 
-         action.disabled = function (graph) {
-           for (var i = 0; i < nodeIds.length; i++) {
-             var nodeId = nodeIds[i];
-             var candidates = action.waysForNode(nodeId, graph);
+       var MultiPolyIn = /*#__PURE__*/function () {
+         function MultiPolyIn(geom, isSubject) {
+           _classCallCheck(this, MultiPolyIn);
 
-             if (candidates.length === 0 || _wayIDs && _wayIDs.length !== candidates.length) {
-               return 'not_eligible';
-             }
+           if (!Array.isArray(geom)) {
+             throw new Error('Input geometry is not a valid Polygon or MultiPolygon');
            }
-         };
-
-         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;
-         };
+           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.
+           }
 
-         return action;
-       }
+           this.polys = [];
+           this.bbox = {
+             ll: {
+               x: Number.POSITIVE_INFINITY,
+               y: Number.POSITIVE_INFINITY
+             },
+             ur: {
+               x: Number.NEGATIVE_INFINITY,
+               y: Number.NEGATIVE_INFINITY
+             }
+           };
 
-       function coreGraph(other, mutable) {
-         if (!(this instanceof coreGraph)) return new coreGraph(other, mutable);
+           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);
+           }
 
-         if (other instanceof coreGraph) {
-           var base = other.base();
-           this.entities = Object.assign(Object.create(base.entities), other.entities);
-           this._parentWays = Object.assign(Object.create(base.parentWays), other._parentWays);
-           this._parentRels = Object.assign(Object.create(base.parentRels), other._parentRels);
-         } else {
-           this.entities = Object.create({});
-           this._parentWays = Object.create({});
-           this._parentRels = Object.create({});
-           this.rebase(other || [], [this]);
+           this.isSubject = isSubject;
          }
 
-         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
+         _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();
 
-           if (!entity) {
-             entity = this.entities.__proto__[id]; // eslint-disable-line no-proto
-           }
+               for (var j = 0, jMax = polySweepEvents.length; j < jMax; j++) {
+                 sweepEvents.push(polySweepEvents[j]);
+               }
+             }
 
-           if (!entity) {
-             throw new Error('entity ' + id + ' not found');
+             return sweepEvents;
            }
+         }]);
 
-           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] = {});
+         return MultiPolyIn;
+       }();
 
-           if (transients[key] !== undefined) {
-             return transients[key];
-           }
+       var RingOut = /*#__PURE__*/function () {
+         _createClass(RingOut, null, [{
+           key: "factory",
 
-           transients[key] = fn.call(entity);
-           return transients[key];
-         },
-         parentWays: function parentWays(entity) {
-           var parents = this._parentWays[entity.id];
-           var result = [];
+           /* 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 (parents) {
-             parents.forEach(function (id) {
-               result.push(this.entity(id));
-             }, this);
-           }
+             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 */
 
-           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 = [];
+               while (true) {
+                 prevEvent = event;
+                 event = nextEvent;
+                 events.push(event);
+                 /* Is the ring complete? */
 
-           if (parents) {
-             parents.forEach(function (id) {
-               result.push(this.entity(id));
-             }, this);
-           }
+                 if (event.point === startingPoint) break;
 
-           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 = [];
+                 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. */
 
-           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;
+                   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 */
 
-           for (i = 0; i < entities.length; i++) {
-             var entity = entities[i];
-             if (!entity.visible || !force && base.entities[entity.id]) continue; // Merging data into the base graph
 
-             base.entities[entity.id] = entity;
+                   if (availableLEs.length === 1) {
+                     nextEvent = availableLEs[0].otherSE;
+                     break;
+                   }
+                   /* We must have an intersection. Check for a completed loop */
 
-             this._updateCalculated(undefined, entity, base.parentWays, base.parentRels); // Restore provisionally-deleted nodes that are discovered to have an extant parent
 
+                   var indexLE = null;
 
-             if (entity.type === 'way') {
-               for (j = 0; j < entity.nodes.length; j++) {
-                 id = entity.nodes[j];
+                   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 */
 
-                 for (k = 1; k < stack.length; k++) {
-                   var ents = stack[k].entities;
 
-                   if (ents.hasOwnProperty(id) && ents[id] === undefined) {
-                     delete ents[id];
+                   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;
            }
+         }]);
 
-           for (i = 0; i < stack.length; i++) {
-             stack[i]._updateRebased();
+         function RingOut(events) {
+           _classCallCheck(this, RingOut);
+
+           this.events = events;
+
+           for (var i = 0, iMax = events.length; i < iMax; i++) {
+             events[i].segment.ringOut = this;
            }
-         },
-         _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;
-             }
+           this.poly = null;
+         }
 
-             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);
-             }
+         _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 (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;
-             }) : [];
+             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 (oldentity && entity) {
-               removed = utilArrayDifference(oldentityMemberIDs, entityMemberIDs);
-               added = utilArrayDifference(entityMemberIDs, oldentityMemberIDs);
-             } else if (oldentity) {
-               removed = oldentityMemberIDs;
-               added = [];
-             } else if (entity) {
-               removed = [];
-               added = entityMemberIDs;
+
+             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]);
              }
 
-             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);
+             return orderedPoints;
+           }
+         }, {
+           key: "isExteriorRing",
+           value: function isExteriorRing() {
+             if (this._isExteriorRing === undefined) {
+               var enclosing = this.enclosingRing();
+               this._isExteriorRing = enclosing ? !enclosing.isExteriorRing() : true;
              }
 
-             for (i = 0; i < added.length; i++) {
-               // make a copy of prototype property, store as own property, and update..
-               parentRels[added[i]] = new Set(parentRels[added[i]]);
-               parentRels[added[i]].add(entity.id);
+             return this._isExteriorRing;
+           }
+         }, {
+           key: "enclosingRing",
+           value: function enclosingRing() {
+             if (this._enclosingRing === undefined) {
+               this._enclosingRing = this._calcEnclosingRing();
              }
+
+             return this._enclosingRing;
            }
-         },
-         replace: function replace(entity) {
-           if (this.entities[entity.id] === entity) return this;
-           return this.update(function () {
-             this._updateCalculated(this.entities[entity.id], entity);
+           /* Returns the ring that encloses this one, if any */
 
-             this.entities[entity.id] = entity;
-           });
-         },
-         remove: function remove(entity) {
-           return this.update(function () {
-             this._updateCalculated(entity, undefined);
+         }, {
+           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];
 
-             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);
+             for (var i = 1, iMax = this.events.length; i < iMax; i++) {
+               var evt = this.events[i];
+               if (SweepEvent.compare(leftMostEvt, evt) > 0) leftMostEvt = evt;
+             }
 
-             delete this.entities[id];
-           });
-         },
-         update: function update() {
-           var graph = this.frozen ? coreGraph(this, true) : this;
+             var prevSeg = leftMostEvt.segment.prevInResult();
+             var prevPrevSeg = prevSeg ? prevSeg.prevInResult() : null;
 
-           for (var i = 0; i < arguments.length; i++) {
-             arguments[i].call(graph, graph);
-           }
+             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 (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);
+               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
 
-           for (var i in entities) {
-             this.entities[i] = entities[i];
+               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
 
-             this._updateCalculated(base.entities[i], this.entities[i]);
+
+               prevSeg = prevPrevSeg.prevInResult();
+               prevPrevSeg = prevSeg ? prevSeg.prevInResult() : null;
+             }
            }
+         }]);
 
-           return this;
-         }
-       };
+         return RingOut;
+       }();
 
-       function osmTurn(turn) {
-         if (!(this instanceof osmTurn)) {
-           return new osmTurn(turn);
+       var PolyOut = /*#__PURE__*/function () {
+         function PolyOut(exteriorRing) {
+           _classCallCheck(this, PolyOut);
+
+           this.exteriorRing = exteriorRing;
+           exteriorRing.poly = this;
+           this.interiorRings = [];
          }
 
-         Object.assign(this, turn);
-       }
-       function osmIntersection(graph, startVertexId, maxDistance) {
-         maxDistance = maxDistance || 30; // in meters
+         _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
 
-         var vgraph = coreGraph(); // virtual graph
+             if (geom[0] === null) return null;
 
-         var i, j, k;
+             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
 
-         function memberOfRestriction(entity) {
-           return graph.parentRelations(entity).some(function (r) {
-             return r.isRestriction();
-           });
-         }
+               if (ringGeom === null) continue;
+               geom.push(ringGeom);
+             }
 
-         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];
-         }
+             return geom;
+           }
+         }]);
 
-         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
+         return PolyOut;
+       }();
 
-         var actions = []; // STEP 1:  walk the graph outwards from starting vertex to search
-         //  for more key vertices and ways to include in the intersection..
+       var MultiPolyOut = /*#__PURE__*/function () {
+         function MultiPolyOut(rings) {
+           _classCallCheck(this, MultiPolyOut);
 
-         while (checkVertices.length) {
-           vertex = checkVertices.pop(); // check this vertex for parent ways that are roads
+           this.rings = rings;
+           this.polys = this._composePolys(rings);
+         }
 
-           checkWays = graph.parentWays(vertex);
-           var hasWays = false;
+         _createClass(MultiPolyOut, [{
+           key: "getGeom",
+           value: function getGeom() {
+             var geom = [];
 
-           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
+             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
 
-             hasWays = true; // check the way's children for more key vertices
+               if (polyGeom === null) continue;
+               geom.push(polyGeom);
+             }
 
-             nodes = utilArrayUniq(graph.childNodes(way));
+             return geom;
+           }
+         }, {
+           key: "_composePolys",
+           value: function _composePolys(rings) {
+             var polys = [];
 
-             for (j = 0; j < nodes.length; j++) {
-               node = nodes[j];
-               if (node === vertex) continue; // same thing
+             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);
+               }
+             }
 
-               if (vertices.indexOf(node) !== -1) continue; // seen it already
+             return polys;
+           }
+         }]);
 
-               if (geoSphericalDistance(node.loc, startNode.loc) > maxDistance) continue; // too far from start
-               // a key vertex will have parents that are also roads
+         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 hasParents = false;
-               parents = graph.parentWays(node);
 
-               for (k = 0; k < parents.length; k++) {
-                 parent = parents[k];
-                 if (parent === way) continue; // same thing
+       var SweepLine = /*#__PURE__*/function () {
+         function SweepLine(queue) {
+           var comparator = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : Segment.compare;
 
-                 if (ways.indexOf(parent) !== -1) continue; // seen it already
+           _classCallCheck(this, SweepLine);
 
-                 if (!isRoad(parent)) continue; // not a road
+           this.queue = queue;
+           this.tree = new Tree(comparator);
+           this.segments = [];
+         }
 
-                 hasParents = true;
-                 break;
-               }
+         _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 (hasParents) {
-                 checkVertices.push(node);
-               }
+             if (event.consumedBy) {
+               if (event.isLeft) this.queue.remove(event.otherSE);else this.tree.remove(segment);
+               return newEvents;
              }
-           }
 
-           if (hasWays) {
-             vertices.push(vertex);
-           }
-         }
+             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
 
-         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
+             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
 
-         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));
-               }
+
+             while (nextSeg === undefined) {
+               nextNode = this.tree.next(nextNode);
+               if (nextNode === null) nextSeg = null;else if (nextNode.key.consumedBy === undefined) nextSeg = nextNode.key;
              }
-           });
-         }); // STEP 3:  Force all oneways to be drawn in the forward direction
 
-         ways.forEach(function (w) {
-           var way = vgraph.entity(w.id);
+             if (event.isLeft) {
+               // Check for intersections against the previous segment in the sweep line
+               var prevMySplitter = null;
 
-           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
+               if (prevSeg) {
+                 var prevInter = prevSeg.getIntersection(segment);
 
-         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 (prevInter !== null) {
+                   if (!segment.isAnEndpoint(prevInter)) prevMySplitter = prevInter;
 
-           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 (!prevSeg.isAnEndpoint(prevInter)) {
+                     var newEventsFromSplit = this._splitSafely(prevSeg, prevInter);
 
-         osmEntity.id.next.way = origCount; // STEP 5:  Update arrays to point to vgraph entities
+                     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
 
-         vertexIds = vertices.map(function (v) {
-           return v.id;
-         });
-         vertices = [];
-         ways = [];
-         vertexIds.forEach(function (id) {
-           var vertex = vgraph.entity(id);
-           var parents = vgraph.parentWays(vertex);
-           vertices.push(vertex);
-           ways = ways.concat(parents);
-         });
-         vertices = utilArrayUniq(vertices);
-         ways = utilArrayUniq(ways);
-         vertexIds = vertices.map(function (v) {
-           return v.id;
-         });
-         wayIds = ways.map(function (w) {
-           return w.id;
-         }); // STEP 6:  Update the ways with some metadata that will be useful for
-         // walking the intersection graph later and rendering turn arrows.
 
-         function withMetadata(way, vertexIds) {
-           var __oneWay = way.isOneWay(); // which affixes are key vertices?
+               var nextMySplitter = null;
 
+               if (nextSeg) {
+                 var nextInter = nextSeg.getIntersection(segment);
 
-           var __first = vertexIds.indexOf(way.first()) !== -1;
+                 if (nextInter !== null) {
+                   if (!segment.isAnEndpoint(nextInter)) nextMySplitter = nextInter;
 
-           var __last = vertexIds.indexOf(way.last()) !== -1; // what roles is this way eligible for?
+                   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().
 
-           var __via = __first && __last;
 
-           var __from = __first && !__oneWay || __last;
+               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
 
-           var __to = __first || __last && !__oneWay;
+                 this.queue.remove(segment.rightSE);
+                 newEvents.push(segment.rightSE);
 
-           return way.update({
-             __first: __first,
-             __last: __last,
-             __from: __from,
-             __via: __via,
-             __to: __to,
-             __oneWay: __oneWay
-           });
-         }
+                 var _newEventsFromSplit2 = segment.split(mySplitter);
 
-         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 (var _i2 = 0, _iMax2 = _newEventsFromSplit2.length; _i2 < _iMax2; _i2++) {
+                   newEvents.push(_newEventsFromSplit2[_i2]);
+                 }
+               }
 
-         var keepGoing;
-         var removeWayIds = [];
-         var removeVertexIds = [];
+               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);
 
-         do {
-           keepGoing = false;
-           checkVertices = vertexIds.slice();
+                 if (inter !== null) {
+                   if (!prevSeg.isAnEndpoint(inter)) {
+                     var _newEventsFromSplit3 = this._splitSafely(prevSeg, inter);
 
-           for (i = 0; i < checkVertices.length; i++) {
-             var vertexId = checkVertices[i];
-             vertex = vgraph.hasEntity(vertexId);
+                     for (var _i3 = 0, _iMax3 = _newEventsFromSplit3.length; _i3 < _iMax3; _i3++) {
+                       newEvents.push(_newEventsFromSplit3[_i3]);
+                     }
+                   }
 
-             if (!vertex) {
-               if (vertexIds.indexOf(vertexId) !== -1) {
-                 vertexIds.splice(vertexIds.indexOf(vertexId), 1); // stop checking this one
+                   if (!nextSeg.isAnEndpoint(inter)) {
+                     var _newEventsFromSplit4 = this._splitSafely(nextSeg, inter);
+
+                     for (var _i4 = 0, _iMax4 = _newEventsFromSplit4.length; _i4 < _iMax4; _i4++) {
+                       newEvents.push(_newEventsFromSplit4[_i4]);
+                     }
+                   }
+                 }
                }
 
-               removeVertexIds.push(vertexId);
-               continue;
+               this.tree.remove(segment);
              }
 
-             parents = vgraph.parentWays(vertex);
+             return newEvents;
+           }
+           /* Safely split a segment that is currently in the datastructures
+            * IE - a segment other than the one that is currently being processed. */
 
-             if (parents.length < 3) {
-               if (vertexIds.indexOf(vertexId) !== -1) {
-                 vertexIds.splice(vertexIds.indexOf(vertexId), 1); // stop checking this one
-               }
-             }
+         }, {
+           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 (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 (seg.consumedBy === undefined) this.tree.insert(seg);
+             return newEvents;
+           }
+         }]);
 
-               if (aIsLeaf && !bIsLeaf) {
-                 leaf = a;
-                 survivor = b;
-               } else if (!aIsLeaf && bIsLeaf) {
-                 leaf = b;
-                 survivor = a;
-               }
+         return SweepLine;
+       }();
 
-               if (leaf && survivor) {
-                 survivor = withMetadata(survivor, vertexIds); // update survivor way
+       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;
 
-                 vgraph = vgraph.replace(survivor).remove(leaf); // update graph
+       var Operation = /*#__PURE__*/function () {
+         function Operation() {
+           _classCallCheck(this, Operation);
+         }
 
-                 removeWayIds.push(leaf.id);
-                 keepGoing = true;
-               }
+         _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));
              }
 
-             parents = vgraph.parentWays(vertex);
+             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 (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 (operation.type === 'difference') {
+               // in place removal
+               var subject = multipolys[0];
+               var _i = 1;
 
-               removeVertexIds.push(vertexId);
-               keepGoing = true;
+               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 (parents.length < 1) {
-               // vertex is no longer attached to anything
-               vgraph = vgraph.remove(vertex);
+
+             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 [];
+                 }
+               }
              }
-           }
-         } while (keepGoing);
+             /* Put segment endpoints in a priority queue */
 
-         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 queue = new Tree(SweepEvent.compare);
 
-         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)
+             for (var _i3 = 0, _iMax2 = multipolys.length; _i3 < _iMax2; _i3++) {
+               var sweepEvents = multipolys[_i3].getSweepEvents();
 
-           var maxPathLength = maxViaWay * 2 + 3;
-           var turns = [];
-           step(start);
-           return turns; // traverse the intersection graph and find all the valid paths
+               for (var _j = 0, _jMax = sweepEvents.length; _j < _jMax; _j++) {
+                 queue.insert(sweepEvents[_j]);
 
-           function step(entity, currPath, currRestrictions, matchedRestriction) {
-             currPath = (currPath || []).slice(); // shallow copy
+                 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 */
 
-             if (currPath.length >= maxPathLength) return;
-             currPath.push(entity.id);
-             currRestrictions = (currRestrictions || []).slice(); // shallow copy
 
-             var i, j;
+             var sweepLine = new SweepLine(queue);
+             var prevQueueSize = queue.size;
+             var node = queue.pop();
 
-             if (entity.type === 'node') {
-               var parents = vgraph.parentWays(entity);
-               var nextWays = []; // which ways can we step into?
+             while (node) {
+               var evt = node.key;
 
-               for (i = 0; i < parents.length; i++) {
-                 var way = parents[i]; // if next way is a oneway incoming to this vertex, skip
+               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 (way.__oneWay && way.nodes[0] !== entity.id) continue; // if we have seen it before (allowing for an initial u-turn), skip
+               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 (currPath.indexOf(way.id) !== -1 && currPath.length >= 3) continue; // Check all "current" restrictions (where we've already walked the `FROM`)
+               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 restrict = null;
+               var newEvents = sweepLine.process(evt);
 
-                 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?
+               for (var _i4 = 0, _iMax3 = newEvents.length; _i4 < _iMax3; _i4++) {
+                 var _evt = newEvents[_i4];
+                 if (_evt.consumedBy === undefined) queue.insert(_evt);
+               }
 
-                   var matchesFrom = f.id === fromWayId;
-                   var matchesViaTo = false;
-                   var isAlongOnlyPath = false;
+               prevQueueSize = queue.size;
+               node = queue.pop();
+             } // free some memory we don't need anymore
 
-                   if (t.id === way.id) {
-                     // match TO
-                     if (v.length === 1 && v[0].type === 'node') {
-                       // match VIA node
-                       matchesViaTo = v[0].id === entity.id && (matchesFrom && currPath.length === 2 || !matchesFrom && currPath.length > 2);
-                     } else {
-                       // match all VIA ways
-                       var pathVias = [];
 
-                       for (k = 2; k < currPath.length; k += 2) {
-                         // k = 2 skips FROM
-                         pathVias.push(currPath[k]); // (path goes way-node-way...)
-                       }
+             rounder.reset();
+             /* Collect and compile segments we're keeping into a multipolygon */
 
-                       var restrictionVias = [];
+             var ringsOut = RingOut.factory(sweepLine.segments);
+             var result = new MultiPolyOut(ringsOut);
+             return result.getGeom();
+           }
+         }]);
 
-                       for (k = 0; k < v.length; k++) {
-                         if (v[k].type === 'way') {
-                           restrictionVias.push(v[k].id);
-                         }
-                       }
+         return Operation;
+       }(); // singleton available by import
 
-                       var diff = utilArrayDifference(pathVias, restrictionVias);
-                       matchesViaTo = !diff.length;
-                     }
-                   } else if (isOnly) {
-                     for (k = 0; k < v.length; k++) {
-                       // way doesn't match TO, but is one of the via ways along the path of an "only"
-                       if (v[k].type === 'way' && v[k].id === way.id) {
-                         isAlongOnlyPath = true;
-                         break;
-                       }
-                     }
-                   }
 
-                   if (matchesViaTo) {
-                     if (isOnly) {
-                       restrict = {
-                         id: restriction.id,
-                         direct: matchesFrom,
-                         from: f.id,
-                         only: true,
-                         end: true
-                       };
-                     } else {
-                       restrict = {
-                         id: restriction.id,
-                         direct: matchesFrom,
-                         from: f.id,
-                         no: true,
-                         end: true
-                       };
-                     }
-                   } else {
-                     // indirect - caused by a different nearby restriction
-                     if (isAlongOnlyPath) {
-                       restrict = {
-                         id: restriction.id,
-                         direct: false,
-                         from: f.id,
-                         only: true,
-                         end: false
-                       };
-                     } else if (isOnly) {
-                       restrict = {
-                         id: restriction.id,
-                         direct: false,
-                         from: f.id,
-                         no: true,
-                         end: true
-                       };
-                     }
-                   } // stop looking if we find a "direct" restriction (matching FROM, VIA, TO)
+       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];
+         }
 
-                   if (restrict && restrict.direct) break;
-                 }
+         return operation.run('union', geom, moreGeoms);
+       };
 
-                 nextWays.push({
-                   way: way,
-                   restrict: restrict
-                 });
-               }
+       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];
+         }
 
-               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)
+         return operation.run('intersection', geom, moreGeoms);
+       };
 
-                 if (matchedRestriction && matchedRestriction.direct === false) {
-                   for (i = 0; i < turnPath.length; i++) {
-                     if (turnPath[i] === matchedRestriction.from) {
-                       turnPath = turnPath.slice(i);
-                       break;
-                     }
-                   }
-                 }
+       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];
+         }
 
-                 var turn = pathToTurn(turnPath);
+         return operation.run('xor', geom, moreGeoms);
+       };
 
-                 if (turn) {
-                   if (matchedRestriction) {
-                     turn.restrictionID = matchedRestriction.id;
-                     turn.no = matchedRestriction.no;
-                     turn.only = matchedRestriction.only;
-                     turn.direct = matchedRestriction.direct;
-                   }
+       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];
+         }
 
-                   turns.push(osmTurn(turn));
-                 }
+         return operation.run('difference', subjectGeom, clippingGeoms);
+       };
 
-                 if (currPath[0] === currPath[2]) return; // if we made a u-turn - stop here
-               }
+       var index = {
+         union: union,
+         intersection: intersection$1,
+         xor: xor,
+         difference: difference
+       };
 
-               if (matchedRestriction && matchedRestriction.end) return; // don't advance any further
-               // which nodes can we step into?
+       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);
+                 }
+               });
+             }
 
-               var n1 = vgraph.entity(entity.first());
-               var n2 = vgraph.entity(entity.last());
-               var dist = geoSphericalDistance(n1.loc, n2.loc);
-               var nextNodes = [];
+             function multi(l) {
+               return l.map(point);
+             }
 
-               if (currPath.length > 1) {
-                 if (dist > maxDistance) return; // the next node is too far
+             function poly(p) {
+               return p.map(multi);
+             }
 
-                 if (!entity.__via) return; // this way is a leaf / can't be a via
-               }
+             function multiPoly(m) {
+               return m.map(poly);
+             }
 
-               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 geometry(obj) {
+               if (!obj) {
+                 return {};
                }
 
-               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
-               }
+               switch (obj.type) {
+                 case "Point":
+                   obj.coordinates = point(obj.coordinates);
+                   return obj;
 
-               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
+                 case "LineString":
+                 case "MultiPoint":
+                   obj.coordinates = multi(obj.coordinates);
+                   return obj;
 
-                   var isOnlyVia = false;
-                   var v = r.membersByRole('via');
+                 case "Polygon":
+                 case "MultiLineString":
+                   obj.coordinates = poly(obj.coordinates);
+                   return obj;
 
-                   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);
+                 case "MultiPolygon":
+                   obj.coordinates = multiPoly(obj.coordinates);
+                   return obj;
 
-                       if (viaWay.first() === nextNode.id || viaWay.last() === nextNode.id) {
-                         isOnlyVia = true;
-                         break;
-                       }
-                     }
-                   }
+                 case "GeometryCollection":
+                   obj.geometries = obj.geometries.map(geometry);
+                   return obj;
 
-                   return isOnlyVia;
-                 });
-                 step(nextNode, currPath, currRestrictions.concat(fromRestrictions), false);
-               });
+                 default:
+                   return {};
+               }
              }
-           } // assumes path is alternating way-node-way of odd length
 
+             function feature(obj) {
+               obj.geometry = geometry(obj.geometry);
+               return obj;
+             }
 
-           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];
+             function featureCollection(f) {
+               f.features = f.features.map(feature);
+               return f;
+             }
 
-             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);
+             function geometryCollection(g) {
+               g.geometries = g.geometries.map(geometry);
+               return g;
+             }
 
-               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
-               }
+             if (!t) {
+               return t;
              }
 
-             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
-             };
+             switch (t.type) {
+               case "Feature":
+                 return feature(t);
 
-             function adjacentNode(wayId, affixId) {
-               var nodes = vgraph.entity(wayId).nodes;
-               return affixId === nodes[0] ? nodes[1] : nodes[nodes.length - 2];
+               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;
              }
            }
-         };
 
-         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;
+           module.exports = parse;
+           module.exports.parse = parse;
+         })();
+       });
 
-         while (angle < 0) {
-           angle += 360;
-         }
+       var FORCED$3 = fails(function () {
+         return new Date(NaN).toJSON() !== null
+           || Date.prototype.toJSON.call({ toISOString: function () { return 1; } }) !== 1;
+       });
 
-         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
+       // `Date.prototype.toJSON` method
+       // https://tc39.es/ecma262/#sec-date.prototype.tojson
+       _export({ target: 'Date', proto: true, forced: FORCED$3 }, {
+         // eslint-disable-next-line no-unused-vars -- required for `.length`
+         toJSON: function toJSON(key) {
+           var O = toObject(this);
+           var pv = toPrimitive(O);
+           return typeof pv == 'number' && !isFinite(pv) ? null : O.toISOString();
+         }
+       });
 
-         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)
+       // `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);
+         }
+       });
 
-         if (angle < 158) return 'no_right_turn';
-         if (angle > 202) return 'no_left_turn';
-         return 'no_straight_on';
+       function isObject$3(obj) {
+         return _typeof(obj) === 'object' && obj !== null;
        }
 
-       function actionMergePolygon(ids, newRelationId) {
-         function groupEntities(graph) {
-           var entities = ids.map(function (id) {
-             return graph.entity(id);
+       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);
            });
-           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';
+         }
+       }
+
+       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 Object.assign({
-             closedWay: [],
-             multipolygon: [],
-             other: []
-           }, geometryGroups);
+           return depth + 1;
          }
 
-         var action = function action(graph) {
-           var entities = groupEntities(graph); // An array representing all the polygons that are part of the multipolygon.
-           //
-           // Each element is itself an array of objects with an id property, and has a
-           // locs property which is an array of the locations forming the polygon.
-
-           var polygons = entities.multipolygon.reduce(function (polygons, m) {
-             return polygons.concat(osmJoinWays(m.members, graph));
-           }, []).concat(entities.closedWay.map(function (d) {
-             var member = [{
-               id: d.id
-             }];
-             member.nodes = graph.childNodes(d);
-             return member;
-           })); // contained is an array of arrays of boolean values,
-           // where contained[j][k] is true iff the jth way is
-           // contained by the kth way.
+         return depth;
+       }
 
-           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 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 members = [];
-           var outer = true;
+           var string = JSON.stringify(obj);
 
-           while (polygons.length) {
-             extractUncontained(polygons);
-             polygons = polygons.filter(isContained);
-             contained = contained.filter(isContained).map(filterContained);
+           if (string === undefined) {
+             return string;
            }
 
-           function isContained(d, i) {
-             return contained[i].some(function (val) {
-               return val;
+           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
              });
-           }
 
-           function filterContained(d) {
-             return d.filter(isContained);
+             if (prettified.length <= length) {
+               return prettified;
+             }
            }
 
-           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'
-                   });
-                 });
+           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');
                }
-             });
-             outer = !outer;
-           } // Move all tags to one relation
 
+               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));
 
-           var relation = entities.multipolygon[0] || osmRelation({
-             id: newRelationId,
-             tags: {
-               type: 'multipolygon'
-             }
-           });
-           entities.multipolygon.slice(1).forEach(function (m) {
-             relation = relation.mergeTags(m.tags);
-             graph = graph.remove(m);
-           });
-           entities.closedWay.forEach(function (way) {
-             function isThisOuter(m) {
-               return m.id === way.id && m.role !== 'inner';
+                 if (value !== undefined) {
+                   items.push(keyPart + value);
+                 }
+               });
+               delimiters = '{}';
              }
 
-             if (members.some(isThisOuter)) {
-               relation = relation.mergeTags(way.tags);
-               graph = graph.replace(way.update({
-                 tags: {}
-               }));
+             if (items.length > 0) {
+               return [delimiters[0], indent + items.join(',\n' + nextIndent), delimiters[1]].join('\n' + currentIndent);
              }
-           });
-           return graph.replace(relation.update({
-             members: members,
-             tags: utilObjectOmit(relation.tags, ['area'])
-           }));
+           }
+
+           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 = {
+           '{': '{',
+           '}': '}',
+           '[': '[',
+           ']': ']',
+           ',': ', ',
+           ':': ': '
          };
 
-         action.disabled = function (graph) {
-           var entities = groupEntities(graph);
+         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
 
-           if (entities.other.length > 0 || entities.closedWay.length + entities.multipolygon.length < 2) {
-             return 'not_eligible';
-           }
+               id = id.toLowerCase();
+               feature.id = id;
+               props.id = id; // Ensure `area` property exists
 
-           if (!entities.multipolygon.every(function (r) {
-             return r.isComplete(graph);
-           })) {
-             return 'incomplete_relation';
-           }
+               if (!props.area) {
+                 var area = geojsonArea.geometry(feature.geometry) / 1e6; // m² to km²
 
-           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));
+                 props.area = Number(area.toFixed(2));
                }
+
+               _this._cache[id] = feature;
              });
-             sharedMultipolygons = sharedMultipolygons.filter(function (relation) {
-               return relation.members.length === entities.closedWay.length;
-             });
+           } // Replace CountryCoder world geometry to be a polygon covering the world.
 
-             if (sharedMultipolygons.length) {
-               // don't create a new multipolygon if it'd be redundant
-               return 'not_eligible';
-             }
-           } else if (entities.closedWay.some(function (way) {
-             return utilArrayIntersection(graph.parentMultipolygons(way), entities.multipolygon).length;
-           })) {
-             // don't add a way to a multipolygon again if it's already a member
-             return 'not_eligible';
-           }
-         };
 
-         return action;
-       }
+           var world = _cloneDeep(feature$1('Q2'));
 
-       var UNSUPPORTED_Y$3 = regexpStickyHelpers.UNSUPPORTED_Y;
+           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
 
-       // `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
-         });
-       }
+           this._cache.Q2 = world;
+         } // validateLocation
+         // `location`  The location to validate
+         //
+         // Pass a `location` value to validate
+         //
+         // Returns a result like:
+         //   {
+         //     type:     'point', 'geojson', or 'countrycoder'
+         //     location:  the queried location
+         //     id:        the stable identifier for the feature
+         //   }
+         // or `null` if the location is invalid
+         //
 
-       var fastDeepEqual = function equal(a, b) {
-         if (a === b) return true;
 
-         if (a && b && _typeof(a) == 'object' && _typeof(b) == 'object') {
-           if (a.constructor !== b.constructor) return false;
-           var length, i, keys;
+         _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 (Array.isArray(a)) {
-             length = a.length;
-             if (length != b.length) return false;
+               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();
 
-             for (i = length; i-- !== 0;) {
-               if (!equal(a[i], b[i])) return false;
+               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
+                 };
+               }
              }
 
-             return true;
-           }
+             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
+           //
 
-           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;
+         }, {
+           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
 
-           for (i = length; i-- !== 0;) {
-             if (!Object.prototype.hasOwnProperty.call(b, keys[i])) return false;
-           }
+             if (this._cache[id]) {
+               return Object.assign(valid, {
+                 feature: this._cache[id]
+               });
+             } // A [lon,lat] coordinate pair?
 
-           for (i = length; i-- !== 0;) {
-             var key = keys[i];
-             if (!equal(a[key], b[key])) return false;
-           }
 
-           return true;
-         } // true if both NaN, false otherwise
+             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] = geojsonPrecision({
+                 type: 'Feature',
+                 id: id,
+                 properties: {
+                   id: id,
+                   area: Number(area.toFixed(2))
+                 },
+                 geometry: circleToPolygon([lon, lat], radius * 1000, EDGES) // km to m
 
-         return a !== a && b !== b;
-       };
+               }, 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));
 
-       // J. W. Hunt and M. D. McIlroy, An algorithm for differential buffer
-       // comparison, Bell Telephone Laboratories CSTR #41 (1976)
-       // http://www.cs.dartmouth.edu/~doug/
-       // https://en.wikipedia.org/wiki/Longest_common_subsequence_problem
-       //
-       // Expects two arrays, finds longest common sequence
+               var 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.
 
-       function LCS(buffer1, buffer2) {
-         var equivalenceClasses = {};
+               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
 
-         for (var j = 0; j < buffer2.length; j++) {
-           var item = buffer2[j];
 
-           if (equivalenceClasses[item]) {
-             equivalenceClasses[item].push(j);
-           } else {
-             equivalenceClasses[item] = [j];
-           }
-         }
+               if (!props.area) {
+                 var _area = geojsonArea.geometry(_feature.geometry) / 1e6; // m² to km²
 
-         var NULLRESULT = {
-           buffer1index: -1,
-           buffer2index: -1,
-           chain: null
-         };
-         var candidates = [NULLRESULT];
 
-         for (var i = 0; i < buffer1.length; i++) {
-           var _item = buffer1[i];
-           var buffer2indices = equivalenceClasses[_item] || [];
-           var r = 0;
-           var c = candidates[0];
+                 props.area = Number(_area.toFixed(2));
+               } // Ensure `id` property exists
 
-           for (var jx = 0; jx < buffer2indices.length; jx++) {
-             var _j = buffer2indices[jx];
-             var s = void 0;
 
-             for (s = r; s < candidates.length; s++) {
-               if (candidates[s].buffer2index < _j && (s === candidates.length - 1 || candidates[s + 1].buffer2index > _j)) {
-                 break;
-               }
+               _feature.id = id;
+               props.id = id;
+               this._cache[id] = _feature;
+               return Object.assign(valid, {
+                 feature: _feature
+               });
              }
 
-             if (s < candidates.length) {
-               var newCandidate = {
-                 buffer1index: i,
-                 buffer2index: _j,
-                 chain: candidates[s]
-               };
-
-               if (r === candidates.length) {
-                 candidates.push(c);
-               } else {
-                 candidates[r] = c;
-               }
+             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
+           //
 
-               r = s + 1;
-               c = newCandidate;
+         }, {
+           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 (r === candidates.length) {
-                 break; // no point in examining further (j)s
+             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
 
-           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].
 
+             include.sort(_sortLocations);
+             var id = '+[' + include.map(function (d) {
+               return d.id;
+             }).join(',') + ']';
 
-         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.
+             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
+           //
 
-       function diffIndices(buffer1, buffer2) {
-         var lcs = LCS(buffer1, buffer2);
-         var result = [];
-         var tail1 = buffer1.length;
-         var tail2 = buffer2.length;
+         }, {
+           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
 
-         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 (this._cache[id]) {
+               return Object.assign(valid, {
+                 feature: this._cache[id]
+               });
+             }
 
-           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)
-             });
-           }
-         }
+             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..
 
-         result.reverse();
-         return result;
-       } // We apply the LCS to build a JSON representation of a
-       // independently derived from O, returns a fairly complicated
-       // internal representation of merge decisions it's taken. The
-       // interested reader may wish to consult
-       //
-       // Sanjeev Khanna, Keshav Kunal, and Benjamin C. Pierce.
-       // 'A Formal Investigation of ' In Arvind and Prasad,
-       // editors, Foundations of Software Technology and Theoretical
-       // Computer Science (FSTTCS), December 2007.
-       //
-       // (http://www.cis.upenn.edu/~bcpierce/papers/diff3-short.pdf)
-       //
+             if (includes.length === 1 && excludes.length === 0) {
+               return Object.assign(valid, {
+                 feature: includes[0].feature
+               });
+             } // Calculate unions
 
 
-       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 = [];
+             var includeGeoJSON = _clip(includes.map(function (d) {
+               return d.feature;
+             }), 'UNION');
 
-         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])
+             var excludeGeoJSON = _clip(excludes.map(function (d) {
+               return d.feature;
+             }), 'UNION'); // Calculate difference, update `area` and return result
 
-           });
-         }
 
-         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;
+             var resultGeoJSON = excludeGeoJSON ? _clip([includeGeoJSON, excludeGeoJSON], 'DIFFERENCE') : includeGeoJSON;
+             var area = geojsonArea.geometry(resultGeoJSON.geometry) / 1e6; // m² to km²
 
-         function advanceTo(endOffset) {
-           if (endOffset > currOffset) {
-             results.push({
-               stable: true,
-               buffer: 'o',
-               bufferStart: currOffset,
-               bufferLength: endOffset - currOffset,
-               bufferContent: o.slice(currOffset, endOffset)
+             resultGeoJSON.id = id;
+             resultGeoJSON.properties = {
+               id: id,
+               area: Number(area.toFixed(2))
+             };
+             this._cache[id] = resultGeoJSON;
+             return Object.assign(valid, {
+               feature: resultGeoJSON
              });
-             currOffset = endOffset;
-           }
-         }
+           } // strict
+           //
 
-         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
+         }, {
+           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
 
-           while (hunks.length) {
-             var nextHunk = hunks[0];
-             var nextHunkStart = nextHunk.oStart;
-             if (nextHunkStart > regionEnd) break; // no overlap
+         }, {
+           key: "cache",
+           value: function cache() {
+             return this._cache;
+           } // stringify
+           // convenience method to prettyStringify the given object
 
-             regionEnd = Math.max(regionEnd, nextHunkStart + nextHunk.oLength);
-             regionHunks.push(hunks.shift());
+         }, {
+           key: "stringify",
+           value: function stringify(obj, options) {
+             return jsonStringifyPrettyCompact(obj, options);
            }
+         }]);
 
-           if (regionHunks.length === 1) {
-             // Only one hunk touches this region, meaning that there is no conflict here.
-             // Either `a` or `b` is inserting into a region of `o` unchanged by the other.
-             if (hunk.abLength > 0) {
-               var buffer = hunk.ab === 'a' ? a : b;
-               results.push({
-                 stable: true,
-                 buffer: hunk.ab,
-                 bufferStart: hunk.abStart,
-                 bufferLength: hunk.abLength,
-                 bufferContent: buffer.slice(hunk.abStart, hunk.abStart + hunk.abLength)
-               });
-             }
-           } else {
-             // A true a/b conflict. Determine the bounds involved from `a`, `o`, and `b`.
-             // Effectively merge all the `a` hunks into one giant hunk, then do the
-             // same for the `b` hunks; then, correct for skew in the regions of `o`
-             // that each side changed, and report appropriate spans for the three sides.
-             var bounds = {
-               a: [a.length, -1, o.length, -1],
-               b: [b.length, -1, o.length, -1]
-             };
-
-             while (regionHunks.length) {
-               hunk = regionHunks.shift();
-               var oStart = hunk.oStart;
-               var oEnd = oStart + hunk.oLength;
-               var abStart = hunk.abStart;
-               var abEnd = abStart + hunk.abLength;
-               var _b = bounds[hunk.ab];
-               _b[0] = Math.min(abStart, _b[0]);
-               _b[1] = Math.max(abEnd, _b[1]);
-               _b[2] = Math.min(oStart, _b[2]);
-               _b[3] = Math.max(oEnd, _b[3]);
-             }
+         return _default;
+       }(); // Wrap the mfogel/polygon-clipping library and return a GeoJSON feature.
 
-             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 _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?
 
-           currOffset = regionEnd;
+         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';
          }
+       }
 
-         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 _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 diff3Merge(a, o, b, options) {
-         var defaults = {
-           excludeFalseConflicts: true,
-           stringSeparator: /\s+/
+       function _sortLocations(a, b) {
+         var rank = {
+           countrycoder: 1,
+           geojson: 2,
+           point: 3
          };
-         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
-             });
-           }
+         var aRank = rank[a.type];
+         var bRank = rank[b.type];
+         return aRank > bRank ? 1 : aRank < bRank ? -1 : a.id.localeCompare(b.id);
+       }
 
-           okBuffer = [];
-         }
+       // `Number.MAX_SAFE_INTEGER` constant
+       // https://tc39.es/ecma262/#sec-number.max_safe_integer
+       _export({ target: 'Number', stat: true }, {
+         MAX_SAFE_INTEGER: 0x1FFFFFFFFFFFFF
+       });
 
-         function isFalseConflict(a, b) {
-           if (a.length !== b.length) return false;
+       var aesJs = createCommonjsModule(function (module, exports) {
+         (function (root) {
 
-           for (var i = 0; i < a.length; i++) {
-             if (a[i] !== b[i]) return false;
+           function checkInt(value) {
+             return parseInt(value) === value;
            }
 
-           return true;
-         }
-
-         regions.forEach(function (region) {
-           if (region.stable) {
-             var _okBuffer;
-
-             (_okBuffer = okBuffer).push.apply(_okBuffer, _toConsumableArray(region.bufferContent));
-           } else {
-             if (options.excludeFalseConflicts && isFalseConflict(region.aContent, region.bContent)) {
-               var _okBuffer2;
+           function checkInts(arrayish) {
+             if (!checkInt(arrayish.length)) {
+               return false;
+             }
 
-               (_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 i = 0; i < arrayish.length; i++) {
+               if (!checkInt(arrayish[i]) || arrayish[i] < 0 || arrayish[i] > 255) {
+                 return false;
+               }
              }
-           }
-         });
-         flushOk();
-         return results;
-       }
 
-       function actionMergeRemoteChanges(id, localGraph, remoteGraph, discardTags, formatUser) {
-         discardTags = discardTags || {};
-         var _option = 'safe'; // 'safe', 'force_local', 'force_remote'
+             return true;
+           }
 
-         var _conflicts = [];
+           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);
+                 }
+               }
 
-         function user(d) {
-           return typeof formatUser === 'function' ? formatUser(d) : d;
-         }
+               return arg;
+             } // It's an array; check it is a valid representation of a byte
 
-         function mergeLocation(remote, target) {
-           function pointEqual(a, b) {
-             var epsilon = 1e-6;
-             return Math.abs(a[0] - b[0]) < epsilon && Math.abs(a[1] - b[1]) < epsilon;
-           }
 
-           if (_option === 'force_local' || pointEqual(target.loc, remote.loc)) {
-             return target;
-           }
+             if (Array.isArray(arg)) {
+               if (!checkInts(arg)) {
+                 throw new Error('Array contains invalid value: ' + arg);
+               }
 
-           if (_option === 'force_remote') {
-             return target.update({
-               loc: remote.loc
-             });
-           }
+               return new Uint8Array(arg);
+             } // Something else, but behaves like an array (maybe a Buffer? Arguments?)
 
-           _conflicts.push(_t('merge_remote_changes.conflict.location', {
-             user: user(remote.user)
-           }));
 
-           return target;
-         }
+             if (checkInt(arg.length) && checkInts(arg)) {
+               return new Uint8Array(arg);
+             }
 
-         function mergeNodes(base, remote, target) {
-           if (_option === 'force_local' || fastDeepEqual(target.nodes, remote.nodes)) {
-             return target;
+             throw new Error('unsupported array-like object');
            }
 
-           if (_option === 'force_remote') {
-             return target.update({
-               nodes: remote.nodes
-             });
+           function createArray(length) {
+             return new Uint8Array(length);
            }
 
-           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 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);
+               }
+             }
 
-           for (var i = 0; i < hunks.length; i++) {
-             var hunk = hunks[i];
+             targetArray.set(sourceArray, targetStart);
+           }
 
-             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;
+           var convertUtf8 = function () {
+             function toBytes(text) {
+               var result = [],
+                   i = 0;
+               text = encodeURI(text);
 
-               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)
-                 }));
+               while (i < text.length) {
+                 var c = text.charCodeAt(i++); // if it is a % sign, encode the following 2 bytes as a hex value
 
-                 break;
+                 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);
              }
-           }
 
-           return _conflicts.length === ccount ? target.update({
-             nodes: nodes
-           }) : target;
-         }
+             function fromBytes(bytes) {
+               var result = [],
+                   i = 0;
 
-         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;
-           }
+               while (i < bytes.length) {
+                 var c = bytes[i];
 
-           var ccount = _conflicts.length;
+                 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;
+                 }
+               }
 
-           for (var i = 0; i < children.length; i++) {
-             var id = children[i];
-             var node = graph.hasEntity(id); // remove unused childNodes..
+               return result.join('');
+             }
 
-             if (targetWay.nodes.indexOf(id) === -1) {
-               if (node && !isUsed(node, targetWay)) {
-                 updates.removeIds.push(id);
-               }
+             return {
+               toBytes: toBytes,
+               fromBytes: fromBytes
+             };
+           }();
 
-               continue;
-             } // restore used childNodes..
+           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));
+               }
 
-             var local = localGraph.hasEntity(id);
-             var remote = remoteGraph.hasEntity(id);
-             var target;
+               return result;
+             } // http://ixti.net/development/javascript/2011/11/11/base64-encodedecode-of-utf8-in-browser-with-js.html
 
-             if (_option === 'force_remote' && remote && remote.visible) {
-               updates.replacements.push(remote);
-             } else if (_option === 'force_local' && local) {
-               target = osmEntity(local);
 
-               if (remote) {
-                 target = target.update({
-                   version: remote.version
-                 });
-               }
+             var Hex = '0123456789abcdef';
 
-               updates.replacements.push(target);
-             } else if (_option === 'safe' && local && remote && local.version !== remote.version) {
-               target = osmEntity(local, {
-                 version: remote.version
-               });
+             function fromBytes(bytes) {
+               var result = [];
 
-               if (remote.visible) {
-                 target = mergeLocation(remote, target);
-               } else {
-                 _conflicts.push(_t('merge_remote_changes.conflict.deleted', {
-                   user: user(remote.user)
-                 }));
+               for (var i = 0; i < bytes.length; i++) {
+                 var v = bytes[i];
+                 result.push(Hex[(v & 0xf0) >> 4] + Hex[v & 0x0f]);
                }
 
-               if (_conflicts.length !== ccount) break;
-               updates.replacements.push(target);
+               return result.join('');
              }
-           }
 
-           return targetWay;
-         }
+             return {
+               toBytes: toBytes,
+               fromBytes: fromBytes
+             };
+           }(); // Number of rounds by keysize
 
-         function updateChildren(updates, graph) {
-           for (var i = 0; i < updates.replacements.length; i++) {
-             graph = graph.replace(updates.replacements[i]);
-           }
 
-           if (updates.removeIds.length) {
-             graph = actionDeleteMultiple(updates.removeIds)(graph);
-           }
+           var numberOfRounds = {
+             16: 10,
+             24: 12,
+             32: 14
+           }; // Round constant words
 
-           return graph;
-         }
+           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)
 
-         function mergeMembers(remote, target) {
-           if (_option === 'force_local' || fastDeepEqual(target.members, remote.members)) {
-             return target;
-           }
+           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
 
-           if (_option === 'force_remote') {
-             return target.update({
-               members: remote.members
-             });
-           }
+           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
 
-           _conflicts.push(_t('merge_remote_changes.conflict.memberlist', {
-             user: user(remote.user)
-           }));
+           var T5 = [0x51f4a750, 0x7e416553, 0x1a17a4c3, 0x3a275e96, 0x3bab6bcb, 0x1f9d45f1, 0xacfa58ab, 0x4be30393, 0x2030fa55, 0xad766df6, 0x88cc7691, 0xf5024c25, 0x4fe5d7fc, 0xc52acbd7, 0x26354480, 0xb562a38f, 0xdeb15a49, 0x25ba1b67, 0x45ea0e98, 0x5dfec0e1, 0xc32f7502, 0x814cf012, 0x8d4697a3, 0x6bd3f9c6, 0x038f5fe7, 0x15929c95, 0xbf6d7aeb, 0x955259da, 0xd4be832d, 0x587421d3, 0x49e06929, 0x8ec9c844, 0x75c2896a, 0xf48e7978, 0x99583e6b, 0x27b971dd, 0xbee14fb6, 0xf088ad17, 0xc920ac66, 0x7dce3ab4, 0x63df4a18, 0xe51a3182, 0x97513360, 0x62537f45, 0xb16477e0, 0xbb6bae84, 0xfe81a01c, 0xf9082b94, 0x70486858, 0x8f45fd19, 0x94de6c87, 0x527bf8b7, 0xab73d323, 0x724b02e2, 0xe31f8f57, 0x6655ab2a, 0xb2eb2807, 0x2fb5c203, 0x86c57b9a, 0xd33708a5, 0x302887f2, 0x23bfa5b2, 0x02036aba, 0xed16825c, 0x8acf1c2b, 0xa779b492, 0xf307f2f0, 0x4e69e2a1, 0x65daf4cd, 0x0605bed5, 0xd134621f, 0xc4a6fe8a, 0x342e539d, 0xa2f355a0, 0x058ae132, 0xa4f6eb75, 0x0b83ec39, 0x4060efaa, 0x5e719f06, 0xbd6e1051, 0x3e218af9, 0x96dd063d, 0xdd3e05ae, 0x4de6bd46, 0x91548db5, 0x71c45d05, 0x0406d46f, 0x605015ff, 0x1998fb24, 0xd6bde997, 0x894043cc, 0x67d99e77, 0xb0e842bd, 0x07898b88, 0xe7195b38, 0x79c8eedb, 0xa17c0a47, 0x7c420fe9, 0xf8841ec9, 0x00000000, 0x09808683, 0x322bed48, 0x1e1170ac, 0x6c5a724e, 0xfd0efffb, 0x0f853856, 0x3daed51e, 0x362d3927, 0x0a0fd964, 0x685ca621, 0x9b5b54d1, 0x24362e3a, 0x0c0a67b1, 0x9357e70f, 0xb4ee96d2, 0x1b9b919e, 0x80c0c54f, 0x61dc20a2, 0x5a774b69, 0x1c121a16, 0xe293ba0a, 0xc0a02ae5, 0x3c22e043, 0x121b171d, 0x0e090d0b, 0xf28bc7ad, 0x2db6a8b9, 0x141ea9c8, 0x57f11985, 0xaf75074c, 0xee99ddbb, 0xa37f60fd, 0xf701269f, 0x5c72f5bc, 0x44663bc5, 0x5bfb7e34, 0x8b432976, 0xcb23c6dc, 0xb6edfc68, 0xb8e4f163, 0xd731dcca, 0x42638510, 0x13972240, 0x84c61120, 0x854a247d, 0xd2bb3df8, 0xaef93211, 0xc729a16d, 0x1d9e2f4b, 0xdcb230f3, 0x0d8652ec, 0x77c1e3d0, 0x2bb3166c, 0xa970b999, 0x119448fa, 0x47e96422, 0xa8fc8cc4, 0xa0f03f1a, 0x567d2cd8, 0x223390ef, 0x87494ec7, 0xd938d1c1, 0x8ccaa2fe, 0x98d40b36, 0xa6f581cf, 0xa57ade28, 0xdab78e26, 0x3fadbfa4, 0x2c3a9de4, 0x5078920d, 0x6a5fcc9b, 0x547e4662, 0xf68d13c2, 0x90d8b8e8, 0x2e39f75e, 0x82c3aff5, 0x9f5d80be, 0x69d0937c, 0x6fd52da9, 0xcf2512b3, 0xc8ac993b, 0x10187da7, 0xe89c636e, 0xdb3bbb7b, 0xcd267809, 0x6e5918f4, 0xec9ab701, 0x834f9aa8, 0xe6956e65, 0xaaffe67e, 0x21bccf08, 0xef15e8e6, 0xbae79bd9, 0x4a6f36ce, 0xea9f09d4, 0x29b07cd6, 0x31a4b2af, 0x2a3f2331, 0xc6a59430, 0x35a266c0, 0x744ebc37, 0xfc82caa6, 0xe090d0b0, 0x33a7d815, 0xf104984a, 0x41ecdaf7, 0x7fcd500e, 0x1791f62f, 0x764dd68d, 0x43efb04d, 0xccaa4d54, 0xe49604df, 0x9ed1b5e3, 0x4c6a881b, 0xc12c1fb8, 0x4665517f, 0x9d5eea04, 0x018c355d, 0xfa877473, 0xfb0b412e, 0xb3671d5a, 0x92dbd252, 0xe9105633, 0x6dd64713, 0x9ad7618c, 0x37a10c7a, 0x59f8148e, 0xeb133c89, 0xcea927ee, 0xb761c935, 0xe11ce5ed, 0x7a47b13c, 0x9cd2df59, 0x55f2733f, 0x1814ce79, 0x73c737bf, 0x53f7cdea, 0x5ffdaa5b, 0xdf3d6f14, 0x7844db86, 0xcaaff381, 0xb968c43e, 0x3824342c, 0xc2a3405f, 0x161dc372, 0xbce2250c, 0x283c498b, 0xff0d9541, 0x39a80171, 0x080cb3de, 0xd8b4e49c, 0x6456c190, 0x7bcb8461, 0xd532b670, 0x486c5c74, 0xd0b85742];
+           var T6 = [0x5051f4a7, 0x537e4165, 0xc31a17a4, 0x963a275e, 0xcb3bab6b, 0xf11f9d45, 0xabacfa58, 0x934be303, 0x552030fa, 0xf6ad766d, 0x9188cc76, 0x25f5024c, 0xfc4fe5d7, 0xd7c52acb, 0x80263544, 0x8fb562a3, 0x49deb15a, 0x6725ba1b, 0x9845ea0e, 0xe15dfec0, 0x02c32f75, 0x12814cf0, 0xa38d4697, 0xc66bd3f9, 0xe7038f5f, 0x9515929c, 0xebbf6d7a, 0xda955259, 0x2dd4be83, 0xd3587421, 0x2949e069, 0x448ec9c8, 0x6a75c289, 0x78f48e79, 0x6b99583e, 0xdd27b971, 0xb6bee14f, 0x17f088ad, 0x66c920ac, 0xb47dce3a, 0x1863df4a, 0x82e51a31, 0x60975133, 0x4562537f, 0xe0b16477, 0x84bb6bae, 0x1cfe81a0, 0x94f9082b, 0x58704868, 0x198f45fd, 0x8794de6c, 0xb7527bf8, 0x23ab73d3, 0xe2724b02, 0x57e31f8f, 0x2a6655ab, 0x07b2eb28, 0x032fb5c2, 0x9a86c57b, 0xa5d33708, 0xf2302887, 0xb223bfa5, 0xba02036a, 0x5ced1682, 0x2b8acf1c, 0x92a779b4, 0xf0f307f2, 0xa14e69e2, 0xcd65daf4, 0xd50605be, 0x1fd13462, 0x8ac4a6fe, 0x9d342e53, 0xa0a2f355, 0x32058ae1, 0x75a4f6eb, 0x390b83ec, 0xaa4060ef, 0x065e719f, 0x51bd6e10, 0xf93e218a, 0x3d96dd06, 0xaedd3e05, 0x464de6bd, 0xb591548d, 0x0571c45d, 0x6f0406d4, 0xff605015, 0x241998fb, 0x97d6bde9, 0xcc894043, 0x7767d99e, 0xbdb0e842, 0x8807898b, 0x38e7195b, 0xdb79c8ee, 0x47a17c0a, 0xe97c420f, 0xc9f8841e, 0x00000000, 0x83098086, 0x48322bed, 0xac1e1170, 0x4e6c5a72, 0xfbfd0eff, 0x560f8538, 0x1e3daed5, 0x27362d39, 0x640a0fd9, 0x21685ca6, 0xd19b5b54, 0x3a24362e, 0xb10c0a67, 0x0f9357e7, 0xd2b4ee96, 0x9e1b9b91, 0x4f80c0c5, 0xa261dc20, 0x695a774b, 0x161c121a, 0x0ae293ba, 0xe5c0a02a, 0x433c22e0, 0x1d121b17, 0x0b0e090d, 0xadf28bc7, 0xb92db6a8, 0xc8141ea9, 0x8557f119, 0x4caf7507, 0xbbee99dd, 0xfda37f60, 0x9ff70126, 0xbc5c72f5, 0xc544663b, 0x345bfb7e, 0x768b4329, 0xdccb23c6, 0x68b6edfc, 0x63b8e4f1, 0xcad731dc, 0x10426385, 0x40139722, 0x2084c611, 0x7d854a24, 0xf8d2bb3d, 0x11aef932, 0x6dc729a1, 0x4b1d9e2f, 0xf3dcb230, 0xec0d8652, 0xd077c1e3, 0x6c2bb316, 0x99a970b9, 0xfa119448, 0x2247e964, 0xc4a8fc8c, 0x1aa0f03f, 0xd8567d2c, 0xef223390, 0xc787494e, 0xc1d938d1, 0xfe8ccaa2, 0x3698d40b, 0xcfa6f581, 0x28a57ade, 0x26dab78e, 0xa43fadbf, 0xe42c3a9d, 0x0d507892, 0x9b6a5fcc, 0x62547e46, 0xc2f68d13, 0xe890d8b8, 0x5e2e39f7, 0xf582c3af, 0xbe9f5d80, 0x7c69d093, 0xa96fd52d, 0xb3cf2512, 0x3bc8ac99, 0xa710187d, 0x6ee89c63, 0x7bdb3bbb, 0x09cd2678, 0xf46e5918, 0x01ec9ab7, 0xa8834f9a, 0x65e6956e, 0x7eaaffe6, 0x0821bccf, 0xe6ef15e8, 0xd9bae79b, 0xce4a6f36, 0xd4ea9f09, 0xd629b07c, 0xaf31a4b2, 0x312a3f23, 0x30c6a594, 0xc035a266, 0x37744ebc, 0xa6fc82ca, 0xb0e090d0, 0x1533a7d8, 0x4af10498, 0xf741ecda, 0x0e7fcd50, 0x2f1791f6, 0x8d764dd6, 0x4d43efb0, 0x54ccaa4d, 0xdfe49604, 0xe39ed1b5, 0x1b4c6a88, 0xb8c12c1f, 0x7f466551, 0x049d5eea, 0x5d018c35, 0x73fa8774, 0x2efb0b41, 0x5ab3671d, 0x5292dbd2, 0x33e91056, 0x136dd647, 0x8c9ad761, 0x7a37a10c, 0x8e59f814, 0x89eb133c, 0xeecea927, 0x35b761c9, 0xede11ce5, 0x3c7a47b1, 0x599cd2df, 0x3f55f273, 0x791814ce, 0xbf73c737, 0xea53f7cd, 0x5b5ffdaa, 0x14df3d6f, 0x867844db, 0x81caaff3, 0x3eb968c4, 0x2c382434, 0x5fc2a340, 0x72161dc3, 0x0cbce225, 0x8b283c49, 0x41ff0d95, 0x7139a801, 0xde080cb3, 0x9cd8b4e4, 0x906456c1, 0x617bcb84, 0x70d532b6, 0x74486c5c, 0x42d0b857];
+           var T7 = [0xa75051f4, 0x65537e41, 0xa4c31a17, 0x5e963a27, 0x6bcb3bab, 0x45f11f9d, 0x58abacfa, 0x03934be3, 0xfa552030, 0x6df6ad76, 0x769188cc, 0x4c25f502, 0xd7fc4fe5, 0xcbd7c52a, 0x44802635, 0xa38fb562, 0x5a49deb1, 0x1b6725ba, 0x0e9845ea, 0xc0e15dfe, 0x7502c32f, 0xf012814c, 0x97a38d46, 0xf9c66bd3, 0x5fe7038f, 0x9c951592, 0x7aebbf6d, 0x59da9552, 0x832dd4be, 0x21d35874, 0x692949e0, 0xc8448ec9, 0x896a75c2, 0x7978f48e, 0x3e6b9958, 0x71dd27b9, 0x4fb6bee1, 0xad17f088, 0xac66c920, 0x3ab47dce, 0x4a1863df, 0x3182e51a, 0x33609751, 0x7f456253, 0x77e0b164, 0xae84bb6b, 0xa01cfe81, 0x2b94f908, 0x68587048, 0xfd198f45, 0x6c8794de, 0xf8b7527b, 0xd323ab73, 0x02e2724b, 0x8f57e31f, 0xab2a6655, 0x2807b2eb, 0xc2032fb5, 0x7b9a86c5, 0x08a5d337, 0x87f23028, 0xa5b223bf, 0x6aba0203, 0x825ced16, 0x1c2b8acf, 0xb492a779, 0xf2f0f307, 0xe2a14e69, 0xf4cd65da, 0xbed50605, 0x621fd134, 0xfe8ac4a6, 0x539d342e, 0x55a0a2f3, 0xe132058a, 0xeb75a4f6, 0xec390b83, 0xefaa4060, 0x9f065e71, 0x1051bd6e, 0x8af93e21, 0x063d96dd, 0x05aedd3e, 0xbd464de6, 0x8db59154, 0x5d0571c4, 0xd46f0406, 0x15ff6050, 0xfb241998, 0xe997d6bd, 0x43cc8940, 0x9e7767d9, 0x42bdb0e8, 0x8b880789, 0x5b38e719, 0xeedb79c8, 0x0a47a17c, 0x0fe97c42, 0x1ec9f884, 0x00000000, 0x86830980, 0xed48322b, 0x70ac1e11, 0x724e6c5a, 0xfffbfd0e, 0x38560f85, 0xd51e3dae, 0x3927362d, 0xd9640a0f, 0xa621685c, 0x54d19b5b, 0x2e3a2436, 0x67b10c0a, 0xe70f9357, 0x96d2b4ee, 0x919e1b9b, 0xc54f80c0, 0x20a261dc, 0x4b695a77, 0x1a161c12, 0xba0ae293, 0x2ae5c0a0, 0xe0433c22, 0x171d121b, 0x0d0b0e09, 0xc7adf28b, 0xa8b92db6, 0xa9c8141e, 0x198557f1, 0x074caf75, 0xddbbee99, 0x60fda37f, 0x269ff701, 0xf5bc5c72, 0x3bc54466, 0x7e345bfb, 0x29768b43, 0xc6dccb23, 0xfc68b6ed, 0xf163b8e4, 0xdccad731, 0x85104263, 0x22401397, 0x112084c6, 0x247d854a, 0x3df8d2bb, 0x3211aef9, 0xa16dc729, 0x2f4b1d9e, 0x30f3dcb2, 0x52ec0d86, 0xe3d077c1, 0x166c2bb3, 0xb999a970, 0x48fa1194, 0x642247e9, 0x8cc4a8fc, 0x3f1aa0f0, 0x2cd8567d, 0x90ef2233, 0x4ec78749, 0xd1c1d938, 0xa2fe8cca, 0x0b3698d4, 0x81cfa6f5, 0xde28a57a, 0x8e26dab7, 0xbfa43fad, 0x9de42c3a, 0x920d5078, 0xcc9b6a5f, 0x4662547e, 0x13c2f68d, 0xb8e890d8, 0xf75e2e39, 0xaff582c3, 0x80be9f5d, 0x937c69d0, 0x2da96fd5, 0x12b3cf25, 0x993bc8ac, 0x7da71018, 0x636ee89c, 0xbb7bdb3b, 0x7809cd26, 0x18f46e59, 0xb701ec9a, 0x9aa8834f, 0x6e65e695, 0xe67eaaff, 0xcf0821bc, 0xe8e6ef15, 0x9bd9bae7, 0x36ce4a6f, 0x09d4ea9f, 0x7cd629b0, 0xb2af31a4, 0x23312a3f, 0x9430c6a5, 0x66c035a2, 0xbc37744e, 0xcaa6fc82, 0xd0b0e090, 0xd81533a7, 0x984af104, 0xdaf741ec, 0x500e7fcd, 0xf62f1791, 0xd68d764d, 0xb04d43ef, 0x4d54ccaa, 0x04dfe496, 0xb5e39ed1, 0x881b4c6a, 0x1fb8c12c, 0x517f4665, 0xea049d5e, 0x355d018c, 0x7473fa87, 0x412efb0b, 0x1d5ab367, 0xd25292db, 0x5633e910, 0x47136dd6, 0x618c9ad7, 0x0c7a37a1, 0x148e59f8, 0x3c89eb13, 0x27eecea9, 0xc935b761, 0xe5ede11c, 0xb13c7a47, 0xdf599cd2, 0x733f55f2, 0xce791814, 0x37bf73c7, 0xcdea53f7, 0xaa5b5ffd, 0x6f14df3d, 0xdb867844, 0xf381caaf, 0xc43eb968, 0x342c3824, 0x405fc2a3, 0xc372161d, 0x250cbce2, 0x498b283c, 0x9541ff0d, 0x017139a8, 0xb3de080c, 0xe49cd8b4, 0xc1906456, 0x84617bcb, 0xb670d532, 0x5c74486c, 0x5742d0b8];
+           var T8 = [0xf4a75051, 0x4165537e, 0x17a4c31a, 0x275e963a, 0xab6bcb3b, 0x9d45f11f, 0xfa58abac, 0xe303934b, 0x30fa5520, 0x766df6ad, 0xcc769188, 0x024c25f5, 0xe5d7fc4f, 0x2acbd7c5, 0x35448026, 0x62a38fb5, 0xb15a49de, 0xba1b6725, 0xea0e9845, 0xfec0e15d, 0x2f7502c3, 0x4cf01281, 0x4697a38d, 0xd3f9c66b, 0x8f5fe703, 0x929c9515, 0x6d7aebbf, 0x5259da95, 0xbe832dd4, 0x7421d358, 0xe0692949, 0xc9c8448e, 0xc2896a75, 0x8e7978f4, 0x583e6b99, 0xb971dd27, 0xe14fb6be, 0x88ad17f0, 0x20ac66c9, 0xce3ab47d, 0xdf4a1863, 0x1a3182e5, 0x51336097, 0x537f4562, 0x6477e0b1, 0x6bae84bb, 0x81a01cfe, 0x082b94f9, 0x48685870, 0x45fd198f, 0xde6c8794, 0x7bf8b752, 0x73d323ab, 0x4b02e272, 0x1f8f57e3, 0x55ab2a66, 0xeb2807b2, 0xb5c2032f, 0xc57b9a86, 0x3708a5d3, 0x2887f230, 0xbfa5b223, 0x036aba02, 0x16825ced, 0xcf1c2b8a, 0x79b492a7, 0x07f2f0f3, 0x69e2a14e, 0xdaf4cd65, 0x05bed506, 0x34621fd1, 0xa6fe8ac4, 0x2e539d34, 0xf355a0a2, 0x8ae13205, 0xf6eb75a4, 0x83ec390b, 0x60efaa40, 0x719f065e, 0x6e1051bd, 0x218af93e, 0xdd063d96, 0x3e05aedd, 0xe6bd464d, 0x548db591, 0xc45d0571, 0x06d46f04, 0x5015ff60, 0x98fb2419, 0xbde997d6, 0x4043cc89, 0xd99e7767, 0xe842bdb0, 0x898b8807, 0x195b38e7, 0xc8eedb79, 0x7c0a47a1, 0x420fe97c, 0x841ec9f8, 0x00000000, 0x80868309, 0x2bed4832, 0x1170ac1e, 0x5a724e6c, 0x0efffbfd, 0x8538560f, 0xaed51e3d, 0x2d392736, 0x0fd9640a, 0x5ca62168, 0x5b54d19b, 0x362e3a24, 0x0a67b10c, 0x57e70f93, 0xee96d2b4, 0x9b919e1b, 0xc0c54f80, 0xdc20a261, 0x774b695a, 0x121a161c, 0x93ba0ae2, 0xa02ae5c0, 0x22e0433c, 0x1b171d12, 0x090d0b0e, 0x8bc7adf2, 0xb6a8b92d, 0x1ea9c814, 0xf1198557, 0x75074caf, 0x99ddbbee, 0x7f60fda3, 0x01269ff7, 0x72f5bc5c, 0x663bc544, 0xfb7e345b, 0x4329768b, 0x23c6dccb, 0xedfc68b6, 0xe4f163b8, 0x31dccad7, 0x63851042, 0x97224013, 0xc6112084, 0x4a247d85, 0xbb3df8d2, 0xf93211ae, 0x29a16dc7, 0x9e2f4b1d, 0xb230f3dc, 0x8652ec0d, 0xc1e3d077, 0xb3166c2b, 0x70b999a9, 0x9448fa11, 0xe9642247, 0xfc8cc4a8, 0xf03f1aa0, 0x7d2cd856, 0x3390ef22, 0x494ec787, 0x38d1c1d9, 0xcaa2fe8c, 0xd40b3698, 0xf581cfa6, 0x7ade28a5, 0xb78e26da, 0xadbfa43f, 0x3a9de42c, 0x78920d50, 0x5fcc9b6a, 0x7e466254, 0x8d13c2f6, 0xd8b8e890, 0x39f75e2e, 0xc3aff582, 0x5d80be9f, 0xd0937c69, 0xd52da96f, 0x2512b3cf, 0xac993bc8, 0x187da710, 0x9c636ee8, 0x3bbb7bdb, 0x267809cd, 0x5918f46e, 0x9ab701ec, 0x4f9aa883, 0x956e65e6, 0xffe67eaa, 0xbccf0821, 0x15e8e6ef, 0xe79bd9ba, 0x6f36ce4a, 0x9f09d4ea, 0xb07cd629, 0xa4b2af31, 0x3f23312a, 0xa59430c6, 0xa266c035, 0x4ebc3774, 0x82caa6fc, 0x90d0b0e0, 0xa7d81533, 0x04984af1, 0xecdaf741, 0xcd500e7f, 0x91f62f17, 0x4dd68d76, 0xefb04d43, 0xaa4d54cc, 0x9604dfe4, 0xd1b5e39e, 0x6a881b4c, 0x2c1fb8c1, 0x65517f46, 0x5eea049d, 0x8c355d01, 0x877473fa, 0x0b412efb, 0x671d5ab3, 0xdbd25292, 0x105633e9, 0xd647136d, 0xd7618c9a, 0xa10c7a37, 0xf8148e59, 0x133c89eb, 0xa927eece, 0x61c935b7, 0x1ce5ede1, 0x47b13c7a, 0xd2df599c, 0xf2733f55, 0x14ce7918, 0xc737bf73, 0xf7cdea53, 0xfdaa5b5f, 0x3d6f14df, 0x44db8678, 0xaff381ca, 0x68c43eb9, 0x24342c38, 0xa3405fc2, 0x1dc37216, 0xe2250cbc, 0x3c498b28, 0x0d9541ff, 0xa8017139, 0x0cb3de08, 0xb4e49cd8, 0x56c19064, 0xcb84617b, 0x32b670d5, 0x6c5c7448, 0xb85742d0]; // Transformations for decryption key expansion
 
-           return target;
-         }
+           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 mergeTags(base, remote, target) {
-           if (_option === 'force_local' || fastDeepEqual(target.tags, remote.tags)) {
-             return target;
+           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;
            }
 
-           if (_option === 'force_remote') {
-             return target.update({
-               tags: remote.tags
+           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)
              });
-           }
 
-           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
+             this._prepare();
+           };
 
-           var changed = false;
+           AES.prototype._prepare = function () {
+             var rounds = numberOfRounds[this.key.length];
 
-           for (var i = 0; i < keys.length; i++) {
-             var k = keys[i];
+             if (rounds == null) {
+               throw new Error('invalid key size (must be 16, 24 or 32 bytes)');
+             } // encryption round keys
 
-             if (o[k] !== b[k] && a[k] !== b[k]) {
-               // changed remotely..
-               if (o[k] !== a[k]) {
-                 // changed locally..
-                 _conflicts.push(_t('merge_remote_changes.conflict.tags', {
-                   tag: k,
-                   local: a[k],
-                   remote: b[k],
-                   user: user(remote.user)
-                 }));
-               } else {
-                 // unchanged locally, accept remote change..
-                 if (b.hasOwnProperty(k)) {
-                   tags[k] = b[k];
-                 } else {
-                   delete tags[k];
-                 }
 
-                 changed = true;
-               }
+             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]);
              }
-           }
 
-           return changed && _conflicts.length === ccount ? target.update({
-             tags: tags
-           }) : target;
-         } //  `graph.base()` is the common ancestor of the two graphs.
-         //  `localGraph` contains user's edits up to saving
-         //  `remoteGraph` contains remote edits to modified nodes
-         //  `graph` must be a descendent of `localGraph` and may include
-         //      some conflict resolution actions performed on it.
-         //
-         //                  --- ... --- `localGraph` -- ... -- `graph`
-         //                 /
-         //  `graph.base()` --- ... --- `remoteGraph`
-         //
+             var 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 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
+             var index;
 
-           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);
-               }
+             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 graph.replace(target);
-             } else {
-               _conflicts.push(_t('merge_remote_changes.conflict.deleted', {
-                 user: user(remote.user)
-               }));
 
-               return graph; // do nothing
-             }
-           } // merge
+             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 (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);
-           }
+               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)
 
-           target = mergeTags(base, remote, target);
+               } else {
+                 for (var i = 1; i < KC / 2; i++) {
+                   tk[i] ^= tk[i - 1];
+                 }
 
-           if (!_conflicts.length) {
-             graph = updateChildren(updates, graph).replace(target);
-           }
+                 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)
 
-           return graph;
-         };
 
-         action.withOption = function (opt) {
-           _option = opt;
-           return action;
-         };
+             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];
+               }
+             }
+           };
 
-         action.conflicts = function () {
-           return _conflicts;
-         };
+           AES.prototype.encrypt = function (plaintext) {
+             if (plaintext.length != 16) {
+               throw new Error('invalid plaintext size (must be 16 bytes)');
+             }
 
-         return action;
-       }
+             var rounds = this._Ke.length - 1;
+             var a = [0, 0, 0, 0]; // convert plaintext to (ints ^ key)
 
-       // https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/MoveNodeAction.as
+             var t = convertToInt32(plaintext);
 
-       function actionMove(moveIDs, tryDelta, projection, cache) {
-         var _delta = tryDelta;
+             for (var i = 0; i < 4; i++) {
+               t[i] ^= this._Ke[0][i];
+             } // apply round transforms
 
-         function setupCache(graph) {
-           function canMove(nodeID) {
-             // Allow movement of any node that is in the selectedIDs list..
-             if (moveIDs.indexOf(nodeID) !== -1) return true; // Allow movement of a vertex where 2 ways meet..
 
-             var parents = graph.parentWays(graph.entity(nodeID));
-             if (parents.length < 3) return true; // Restrict movement of a vertex where >2 ways meet, unless all parentWays are moving too..
+             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];
+               }
 
-             var parentsMoving = parents.every(function (way) {
-               return cache.moving[way.id];
-             });
-             if (!parentsMoving) delete cache.moving[nodeID];
-             return parentsMoving;
-           }
+               t = a.slice();
+             } // the last round is special
 
-           function cacheEntities(ids) {
-             for (var i = 0; i < ids.length; i++) {
-               var id = ids[i];
-               if (cache.moving[id]) continue;
-               cache.moving[id] = true;
-               var entity = graph.hasEntity(id);
-               if (!entity) continue;
 
-               if (entity.type === 'node') {
-                 cache.nodes.push(id);
-                 cache.startLoc[id] = entity.loc;
-               } else if (entity.type === 'way') {
-                 cache.ways.push(id);
-                 cacheEntities(entity.nodes);
-               } else {
-                 cacheEntities(entity.members.map(function (member) {
-                   return member.id;
-                 }));
-               }
-             }
-           }
+             var result = createArray(16),
+                 tt;
 
-           function cacheIntersections(ids) {
-             function isEndpoint(way, id) {
-               return !way.isClosed() && !!way.affix(id);
+             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;
              }
 
-             for (var i = 0; i < ids.length; i++) {
-               var id = ids[i]; // consider only intersections with 1 moved and 1 unmoved way.
+             return result;
+           };
 
-               var childNodes = graph.childNodes(graph.entity(id));
+           AES.prototype.decrypt = function (ciphertext) {
+             if (ciphertext.length != 16) {
+               throw new Error('invalid ciphertext size (must be 16 bytes)');
+             }
 
-               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;
+             var rounds = this._Kd.length - 1;
+             var a = [0, 0, 0, 0]; // convert plaintext to (ints ^ key)
 
-                 for (var k = 0; k < parents.length; k++) {
-                   var way = parents[k];
+             var t = convertToInt32(ciphertext);
 
-                   if (!cache.moving[way.id]) {
-                     unmoved = way;
-                     break;
-                   }
-                 }
+             for (var i = 0; i < 4; i++) {
+               t[i] ^= this._Kd[0][i];
+             } // apply round transforms
 
-                 if (!unmoved) continue; // exclude ways that are overly connected..
 
-                 if (utilArrayIntersection(moved.nodes, unmoved.nodes).length > 2) continue;
-                 if (moved.isArea() || unmoved.isArea()) continue;
-                 cache.intersections.push({
-                   nodeId: node.id,
-                   movedId: moved.id,
-                   unmovedId: unmoved.id,
-                   movedIsEP: isEndpoint(moved, node.id),
-                   unmovedIsEP: isEndpoint(unmoved, node.id)
-                 });
+             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 (!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
-         //
-         //
 
+               t = a.slice();
+             } // the last round is special
 
-         function replaceMovedVertex(nodeId, wayId, graph, delta) {
-           var way = graph.entity(wayId);
-           var moved = graph.entity(nodeId);
-           var movedIndex = way.nodes.indexOf(nodeId);
-           var len, prevIndex, nextIndex;
 
-           if (way.isClosed()) {
-             len = way.nodes.length - 1;
-             prevIndex = (movedIndex + len - 1) % len;
-             nextIndex = (movedIndex + len + 1) % len;
-           } else {
-             len = way.nodes.length;
-             prevIndex = movedIndex - 1;
-             nextIndex = movedIndex + 1;
-           }
+             var result = createArray(16),
+                 tt;
 
-           var prev = graph.hasEntity(way.nodes[prevIndex]);
-           var next = graph.hasEntity(way.nodes[nextIndex]); // Don't add orig vertex at endpoint..
+             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 (!prev || !next) return graph;
-           var key = wayId + '_' + nodeId;
-           var orig = cache.replacedVertex[key];
+             return result;
+           };
+           /**
+            *  Mode Of Operation - Electonic Codebook (ECB)
+            */
 
-           if (!orig) {
-             orig = osmNode();
-             cache.replacedVertex[key] = orig;
-             cache.startLoc[orig.id] = cache.startLoc[nodeId];
-           }
 
-           var start, end;
+           var ModeOfOperationECB = function ModeOfOperationECB(key) {
+             if (!(this instanceof ModeOfOperationECB)) {
+               throw Error('AES must be instanitated with `new`');
+             }
 
-           if (delta) {
-             start = projection(cache.startLoc[nodeId]);
-             end = projection.invert(geoVecAdd(start, delta));
-           } else {
-             end = cache.startLoc[nodeId];
-           }
+             this.description = "Electronic Code Block";
+             this.name = "ecb";
+             this._aes = new AES(key);
+           };
 
-           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..
+           ModeOfOperationECB.prototype.encrypt = function (plaintext) {
+             plaintext = coerceArray(plaintext);
 
-           if (angle > 175 && angle < 185) return graph; // moving forward or backward along way?
+             if (plaintext.length % 16 !== 0) {
+               throw new Error('invalid plaintext size (must be multiple of 16 bytes)');
+             }
 
-           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?
+             var ciphertext = createArray(plaintext.length);
+             var block = createArray(16);
 
-           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.
+             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;
+           };
 
-         function removeDuplicateVertices(wayId, graph) {
-           var way = graph.entity(wayId);
-           var epsilon = 1e-6;
-           var prev, curr;
+           ModeOfOperationECB.prototype.decrypt = function (ciphertext) {
+             ciphertext = coerceArray(ciphertext);
 
-           function isInteresting(node, graph) {
-             return graph.parentWays(node).length > 1 || graph.parentRelations(node).length || node.hasInterestingTags();
-           }
+             if (ciphertext.length % 16 !== 0) {
+               throw new Error('invalid ciphertext size (must be multiple of 16 bytes)');
+             }
 
-           for (var i = 0; i < way.nodes.length; i++) {
-             curr = graph.entity(way.nodes[i]);
+             var plaintext = createArray(ciphertext.length);
+             var block = createArray(16);
 
-             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);
-               }
+             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);
              }
 
-             prev = curr;
-           }
+             return plaintext;
+           };
+           /**
+            *  Mode Of Operation - Cipher Block Chaining (CBC)
+            */
 
-           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
-         //
 
+           var ModeOfOperationCBC = function ModeOfOperationCBC(key, iv) {
+             if (!(this instanceof ModeOfOperationCBC)) {
+               throw Error('AES must be instanitated with `new`');
+             }
 
-         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.
+             this.description = "Cipher Block Chaining";
+             this.name = "cbc";
 
-           if (isEP1 && isEP2) return graph;
-           var nodes1 = graph.childNodes(way1).filter(function (n) {
-             return n !== vertex;
-           });
-           var nodes2 = graph.childNodes(way2).filter(function (n) {
-             return n !== vertex;
-           });
-           if (way1.isClosed() && way1.first() === vertex.id) nodes1.push(nodes1[0]);
-           if (way2.isClosed() && way2.first() === vertex.id) nodes2.push(nodes2[0]);
-           var edge1 = !isEP1 && geoChooseEdge(nodes1, projection(vertex.loc), projection);
-           var edge2 = !isEP2 && geoChooseEdge(nodes2, projection(vertex.loc), projection);
-           var loc; // snap vertex to nearest edge (or some point between them)..
+             if (!iv) {
+               iv = createArray(16);
+             } else if (iv.length != 16) {
+               throw new Error('invalid initialation vector size (must be 16 bytes)');
+             }
 
-           if (!isEP1 && !isEP2) {
-             var epsilon = 1e-6,
-                 maxIter = 10;
+             this._lastCipherblock = coerceArray(iv, true);
+             this._aes = new AES(key);
+           };
 
-             for (var i = 0; i < maxIter; i++) {
-               loc = geoVecInterp(edge1.loc, edge2.loc, 0.5);
-               edge1 = geoChooseEdge(nodes1, projection(loc), projection);
-               edge2 = geoChooseEdge(nodes2, projection(loc), projection);
-               if (Math.abs(edge1.distance - edge2.distance) < epsilon) break;
-             }
-           } else if (!isEP1) {
-             loc = edge1.loc;
-           } else {
-             loc = edge2.loc;
-           }
+           ModeOfOperationCBC.prototype.encrypt = function (plaintext) {
+             plaintext = coerceArray(plaintext);
 
-           graph = graph.replace(vertex.move(loc)); // if zorro happened, reorder nodes..
+             if (plaintext.length % 16 !== 0) {
+               throw new Error('invalid plaintext size (must be multiple of 16 bytes)');
+             }
 
-           if (!isEP1 && edge1.index !== way1.nodes.indexOf(vertex.id)) {
-             way1 = way1.removeNode(vertex.id).addNode(vertex.id, edge1.index);
-             graph = graph.replace(way1);
-           }
+             var ciphertext = createArray(plaintext.length);
+             var block = createArray(16);
 
-           if (!isEP2 && edge2.index !== way2.nodes.indexOf(vertex.id)) {
-             way2 = way2.removeNode(vertex.id).addNode(vertex.id, edge2.index);
-             graph = graph.replace(way2);
-           }
+             for (var i = 0; i < plaintext.length; i += 16) {
+               copyArray(plaintext, block, 0, i, i + 16);
 
-           return graph;
-         }
+               for (var j = 0; j < 16; j++) {
+                 block[j] ^= this._lastCipherblock[j];
+               }
 
-         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);
-           }
+               this._lastCipherblock = this._aes.encrypt(block);
+               copyArray(this._lastCipherblock, ciphertext, i);
+             }
 
-           return graph;
-         } // check if moving way endpoint can cross an unmoved way, if so limit delta..
+             return ciphertext;
+           };
 
+           ModeOfOperationCBC.prototype.decrypt = function (ciphertext) {
+             ciphertext = coerceArray(ciphertext);
 
-         function limitDelta(graph) {
-           function moveNode(loc) {
-             return geoVecAdd(projection(loc), _delta);
-           }
+             if (ciphertext.length % 16 !== 0) {
+               throw new Error('invalid ciphertext size (must be multiple of 16 bytes)');
+             }
 
-           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..
+             var plaintext = createArray(ciphertext.length);
+             var block = createArray(16);
 
-             if (obj.movedIsEP && obj.unmovedIsEP) continue; // Don't limit movement if this vertex is not an endpoint anyway..
+             for (var i = 0; i < ciphertext.length; i += 16) {
+               copyArray(ciphertext, block, 0, i, i + 16);
+               block = this._aes.decrypt(block);
 
-             if (!obj.movedIsEP) continue;
-             var node = graph.entity(obj.nodeId);
-             var start = projection(node.loc);
-             var end = geoVecAdd(start, _delta);
-             var movedNodes = graph.childNodes(graph.entity(obj.movedId));
-             var movedPath = movedNodes.map(function (n) {
-               return moveNode(n.loc);
-             });
-             var unmovedNodes = graph.childNodes(graph.entity(obj.unmovedId));
-             var unmovedPath = unmovedNodes.map(function (n) {
-               return projection(n.loc);
-             });
-             var hits = geoPathIntersections(movedPath, unmovedPath);
+               for (var j = 0; j < 16; j++) {
+                 plaintext[i + j] = block[j] ^ this._lastCipherblock[j];
+               }
 
-             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);
+               copyArray(ciphertext, this._lastCipherblock, 0, i, i + 16);
              }
-           }
-         }
 
-         var action = function action(graph) {
-           if (_delta[0] === 0 && _delta[1] === 0) return graph;
-           setupCache(graph);
+             return plaintext;
+           };
+           /**
+            *  Mode Of Operation - Cipher Feedback (CFB)
+            */
 
-           if (cache.intersections.length) {
-             limitDelta(graph);
-           }
 
-           for (var i = 0; i < cache.nodes.length; i++) {
-             var node = graph.entity(cache.nodes[i]);
-             var start = projection(node.loc);
-             var end = geoVecAdd(start, _delta);
-             graph = graph.replace(node.move(projection.invert(end)));
-           }
+           var ModeOfOperationCFB = function ModeOfOperationCFB(key, iv, segmentSize) {
+             if (!(this instanceof ModeOfOperationCFB)) {
+               throw Error('AES must be instanitated with `new`');
+             }
 
-           if (cache.intersections.length) {
-             graph = cleanupIntersections(graph);
-           }
+             this.description = "Cipher Feedback";
+             this.name = "cfb";
 
-           return graph;
-         };
+             if (!iv) {
+               iv = createArray(16);
+             } else if (iv.length != 16) {
+               throw new Error('invalid initialation vector size (must be 16 size)');
+             }
 
-         action.delta = function () {
-           return _delta;
-         };
+             if (!segmentSize) {
+               segmentSize = 1;
+             }
 
-         return action;
-       }
+             this.segmentSize = segmentSize;
+             this._shiftRegister = coerceArray(iv, true);
+             this._aes = new AES(key);
+           };
 
-       function actionMoveMember(relationId, fromIndex, toIndex) {
-         return function (graph) {
-           return graph.replace(graph.entity(relationId).moveMember(fromIndex, toIndex));
-         };
-       }
+           ModeOfOperationCFB.prototype.encrypt = function (plaintext) {
+             if (plaintext.length % this.segmentSize != 0) {
+               throw new Error('invalid plaintext size (must be segmentSize bytes)');
+             }
 
-       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)));
-         };
+             var encrypted = coerceArray(plaintext, true);
+             var xorSegment;
 
-         action.transitionable = true;
-         return action;
-       }
+             for (var i = 0; i < encrypted.length; i += this.segmentSize) {
+               xorSegment = this._aes.encrypt(this._shiftRegister);
 
-       function actionNoop() {
-         return function (graph) {
-           return graph;
-         };
-       }
+               for (var j = 0; j < this.segmentSize; j++) {
+                 encrypted[i + j] ^= xorSegment[j];
+               } // Shift the register
 
-       function actionOrthogonalize(wayID, projection, vertexID, degThresh, ep) {
-         var epsilon = ep || 1e-4;
-         var threshold = degThresh || 13; // degrees within right or straight to alter
-         // We test normalized dot products so we can compare as cos(angle)
 
-         var lowerThreshold = Math.cos((90 - threshold) * Math.PI / 180);
-         var upperThreshold = Math.cos(threshold * Math.PI / 180);
+               copyArray(this._shiftRegister, this._shiftRegister, 0, this.segmentSize);
+               copyArray(encrypted, this._shiftRegister, 16 - this.segmentSize, i, i + this.segmentSize);
+             }
 
-         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 encrypted;
+           };
 
-           if (way.tags.nonsquare) {
-             var tags = Object.assign({}, way.tags); // since we're squaring, remove indication that this is physically unsquare
+           ModeOfOperationCFB.prototype.decrypt = function (ciphertext) {
+             if (ciphertext.length % this.segmentSize != 0) {
+               throw new Error('invalid ciphertext size (must be segmentSize bytes)');
+             }
 
-             delete tags.nonsquare;
-             way = way.update({
-               tags: tags
-             });
-           }
+             var plaintext = coerceArray(ciphertext, true);
+             var xorSegment;
 
-           graph = graph.replace(way);
-           var isClosed = way.isClosed();
-           var nodes = graph.childNodes(way).slice(); // shallow copy
+             for (var i = 0; i < plaintext.length; i += this.segmentSize) {
+               xorSegment = this._aes.encrypt(this._shiftRegister);
 
-           if (isClosed) nodes.pop();
+               for (var j = 0; j < this.segmentSize; j++) {
+                 plaintext[i + j] ^= xorSegment[j];
+               } // Shift the register
 
-           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
 
+               copyArray(this._shiftRegister, this._shiftRegister, 0, this.segmentSize);
+               copyArray(ciphertext, this._shiftRegister, 16 - this.segmentSize, i, i + this.segmentSize);
+             }
 
-           var nodeCount = {};
-           var points = [];
-           var corner = {
-             i: 0,
-             dotp: 1
+             return plaintext;
            };
-           var node, point, loc, score, motions, i, j;
+           /**
+            *  Mode Of Operation - Output Feedback (OFB)
+            */
 
-           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;
+           var ModeOfOperationOFB = function ModeOfOperationOFB(key, iv) {
+             if (!(this instanceof ModeOfOperationOFB)) {
+               throw Error('AES must be instanitated with `new`');
+             }
 
-               if (score < epsilon) {
-                 break;
-               }
+             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)');
              }
 
-             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
+             this._lastPrecipher = coerceArray(iv, true);
+             this._lastPrecipherIndex = 16;
+             this._aes = new AES(key);
+           };
 
-             for (i = 0; i < points.length; i++) {
-               point = points[i];
-               var dotp = 0;
+           ModeOfOperationOFB.prototype.encrypt = function (plaintext) {
+             var encrypted = coerceArray(plaintext, true);
 
-               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));
+             for (var i = 0; i < encrypted.length; i++) {
+               if (this._lastPrecipherIndex === 16) {
+                 this._lastPrecipher = this._aes.encrypt(this._lastPrecipher);
+                 this._lastPrecipherIndex = 0;
                }
 
-               if (dotp > upperThreshold) {
-                 straights.push(point);
-               } else {
-                 simplified.push(point);
-               }
-             } // Orthogonalize the simplified shape
+               encrypted[i] ^= this._lastPrecipher[this._lastPrecipherIndex++];
+             }
 
+             return encrypted;
+           }; // Decryption is symetric
 
-             var bestPoints = clonePoints(simplified);
-             var originalPoints = clonePoints(simplified);
-             score = Infinity;
 
-             for (i = 0; i < 1000; i++) {
-               motions = simplified.map(calcMotion);
+           ModeOfOperationOFB.prototype.decrypt = ModeOfOperationOFB.prototype.encrypt;
+           /**
+            *  Counter object for CTR common mode of operation
+            */
 
-               for (j = 0; j < motions.length; j++) {
-                 simplified[j].coord = geoVecAdd(simplified[j].coord, motions[j]);
-               }
+           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
 
-               var newScore = geoOrthoCalcScore(simplified, isClosed, epsilon, threshold);
 
-               if (newScore < score) {
-                 bestPoints = clonePoints(simplified);
-                 score = newScore;
-               }
+             if (initialValue !== 0 && !initialValue) {
+               initialValue = 1;
+             }
 
-               if (score < epsilon) {
-                 break;
-               }
+             if (typeof initialValue === 'number') {
+               this._counter = createArray(16);
+               this.setValue(initialValue);
+             } else {
+               this.setBytes(initialValue);
              }
+           };
 
-             var bestCoords = bestPoints.map(function (p) {
-               return p.coord;
-             });
-             if (isClosed) bestCoords.push(bestCoords[0]); // move the nodes that should move
+           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
 
-             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
+             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);
+             }
+           };
 
-             for (i = 0; i < straights.length; i++) {
-               point = straights[i];
-               if (nodeCount[point.id] > 1) continue; // skip self-intersections
+           Counter.prototype.setBytes = function (bytes) {
+             bytes = coerceArray(bytes, true);
 
-               node = graph.entity(point.id);
+             if (bytes.length != 16) {
+               throw new Error('invalid counter bytes size (must be 16 bytes)');
+             }
 
-               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);
+             this._counter = bytes;
+           };
 
-                 if (choice) {
-                   loc = projection.invert(choice.target);
-                   graph = graph.replace(node.move(geoVecInterp(node.loc, loc, t)));
-                 }
+           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;
                }
              }
-           }
-
-           return graph;
+           };
+           /**
+            *  Mode Of Operation - Counter (CTR)
+            */
 
-           function clonePoints(array) {
-             return array.map(function (p) {
-               return {
-                 id: p.id,
-                 coord: [p.coord[0], p.coord[1]]
-               };
-             });
-           }
 
-           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)
+           var ModeOfOperationCTR = function ModeOfOperationCTR(key, counter) {
+             if (!(this instanceof ModeOfOperationCTR)) {
+               throw Error('AES must be instanitated with `new`');
+             }
 
-             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);
+             this.description = "Counter";
+             this.name = "ctr";
 
-             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 (!(counter instanceof Counter)) {
+               counter = new Counter(counter);
              }
 
-             return [0, 0]; // do nothing
-           }
-         }; // if we are only orthogonalizing one vertex,
-         // get that vertex and the previous and next
+             this._counter = counter;
+             this._remainingCounter = null;
+             this._remainingCounterIndex = 16;
+             this._aes = new AES(key);
+           };
 
+           ModeOfOperationCTR.prototype.encrypt = function (plaintext) {
+             var encrypted = coerceArray(plaintext, true);
 
-         function nodeSubset(nodes, vertexID, isClosed) {
-           var first = isClosed ? 0 : 1;
-           var last = isClosed ? nodes.length : nodes.length - 1;
+             for (var i = 0; i < encrypted.length; i++) {
+               if (this._remainingCounterIndex === 16) {
+                 this._remainingCounter = this._aes.encrypt(this._counter._counter);
+                 this._remainingCounterIndex = 0;
 
-           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]];
-             }
-           }
+                 this._counter.increment();
+               }
 
-           return [];
-         }
+               encrypted[i] ^= this._remainingCounter[this._remainingCounterIndex++];
+             }
 
-         action.disabled = function (graph) {
-           var way = graph.entity(wayID);
-           way = way.removeNode(''); // sanity check - remove any consecutive duplicates
+             return encrypted;
+           }; // Decryption is symetric
 
-           graph = graph.replace(way);
-           var isClosed = way.isClosed();
-           var nodes = graph.childNodes(way).slice(); // shallow copy
 
-           if (isClosed) nodes.pop();
-           var allowStraightAngles = false;
+           ModeOfOperationCTR.prototype.decrypt = ModeOfOperationCTR.prototype.encrypt; ///////////////////////
+           // Padding
+           // See:https://tools.ietf.org/html/rfc2315
 
-           if (vertexID !== undefined) {
-             allowStraightAngles = true;
-             nodes = nodeSubset(nodes, vertexID, isClosed);
-             if (nodes.length !== 3) return 'end_vertex';
-           }
+           function pkcs7pad(data) {
+             data = coerceArray(data, true);
+             var padder = 16 - data.length % 16;
+             var result = createArray(data.length + padder);
+             copyArray(data, result);
 
-           var coords = nodes.map(function (n) {
-             return projection(n.loc);
-           });
-           var score = geoOrthoCanOrthogonalize(coords, isClosed, epsilon, threshold, allowStraightAngles);
+             for (var i = data.length; i < result.length; i++) {
+               result[i] = padder;
+             }
 
-           if (score === null) {
-             return 'not_squarish';
-           } else if (score === 0) {
-             return 'square_enough';
-           } else {
-             return false;
+             return result;
            }
-         };
-
-         action.transitionable = true;
-         return action;
-       }
-
-       //
-       // `turn` must be an `osmTurn` object
-       // see osm/intersection.js, pathToTurn()
-       //
-       // This specifies a restriction of type `restriction` when traveling from
-       // `turn.from.way` toward `turn.to.way` via `turn.via.node` OR `turn.via.ways`.
-       // (The action does not check that these entities form a valid intersection.)
-       //
-       // From, to, and via ways should be split before calling this action.
-       // (old versions of the code would split the ways here, but we no longer do it)
-       //
-       // For testing convenience, accepts a restrictionID to assign to the new
-       // relation. Normally, this will be undefined and the relation will
-       // automatically be assigned a new ID.
-       //
 
-       function actionRestrictTurn(turn, restrictionType, restrictionID) {
-         return function (graph) {
-           var fromWay = graph.entity(turn.from.way);
-           var toWay = graph.entity(turn.to.way);
-           var viaNode = turn.via.node && graph.entity(turn.via.node);
-           var viaWays = turn.via.ways && turn.via.ways.map(function (id) {
-             return graph.entity(id);
-           });
-           var members = [];
-           members.push({
-             id: fromWay.id,
-             type: 'way',
-             role: 'from'
-           });
+           function pkcs7strip(data) {
+             data = coerceArray(data, true);
 
-           if (viaNode) {
-             members.push({
-               id: viaNode.id,
-               type: 'node',
-               role: 'via'
-             });
-           } else if (viaWays) {
-             viaWays.forEach(function (viaWay) {
-               members.push({
-                 id: viaWay.id,
-                 type: 'way',
-                 role: 'via'
-               });
-             });
-           }
+             if (data.length < 16) {
+               throw new Error('PKCS#7 invalid length');
+             }
 
-           members.push({
-             id: toWay.id,
-             type: 'way',
-             role: 'to'
-           });
-           return graph.replace(osmRelation({
-             id: restrictionID,
-             tags: {
-               type: 'restriction',
-               restriction: restrictionType
-             },
-             members: members
-           }));
-         };
-       }
+             var padder = data[data.length - 1];
 
-       function actionRevert(id) {
-         var action = function action(graph) {
-           var entity = graph.hasEntity(id),
-               base = graph.base().entities[id];
+             if (padder > 16) {
+               throw new Error('PKCS#7 padding byte out of range');
+             }
 
-           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);
+             var length = data.length - padder;
 
-                 if (parent.isDegenerate()) {
-                   graph = actionDeleteWay(parent.id)(graph);
-                 }
-               });
+             for (var i = 0; i < padder; i++) {
+               if (data[length + i] !== padder) {
+                 throw new Error('PKCS#7 invalid padding byte');
+               }
              }
 
-             graph.parentRelations(entity).forEach(function (parent) {
-               parent = parent.removeMembersWithID(id);
-               graph = graph.replace(parent);
+             var result = createArray(length);
+             copyArray(data, result, 0, 0, length);
+             return result;
+           } ///////////////////////
+           // Exporting
+           // The block cipher
 
-               if (parent.isDegenerate()) {
-                 graph = actionDeleteRelation(parent.id)(graph);
+
+           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
            }
+         })();
+       });
 
-           return graph.revert(id);
-         };
+       // 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.
 
-         return action;
+       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 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)));
-             });
-           });
-         };
+       function utilCleanTags(tags) {
+         var out = {};
 
-         return action;
-       }
+         for (var k in tags) {
+           if (!k) continue;
+           var v = tags[k];
 
-       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 (v !== undefined) {
+             out[k] = cleanValue(k, v);
+           }
+         }
 
-       /* Align nodes along their common axis */
+         return out;
 
-       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
+         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;
+         }
+       }
 
-         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 _detected;
 
-           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 utilDetect(refresh) {
+         if (_detected && !refresh) return _detected;
+         _detected = {};
+         var ua = navigator.userAgent;
+         var m = null;
+         /* Browser */
 
-           if (isLong) {
-             return [p1, q1];
-           }
+         m = ua.match(/(edge)\/?\s*(\.?\d+(\.\d+)*)/i); // Edge
 
-           return [p2, q2];
+         if (m !== null) {
+           _detected.browser = m[1];
+           _detected.version = m[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
+         if (!_detected.browser) {
+           m = ua.match(/Trident\/.*rv:([0-9]{1,}[\.0-9]{0,})/i); // IE11
 
-           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)));
+           if (m !== null) {
+             _detected.browser = 'msie';
+             _detected.version = m[1];
            }
+         }
 
-           return graph;
-         };
+         if (!_detected.browser) {
+           m = ua.match(/(opr)\/?\s*(\.?\d+(\.\d+)*)/i); // Opera 15+
 
-         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 (m !== null) {
+             _detected.browser = 'Opera';
+             _detected.version = m[2];
+           }
+         }
 
-           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 (!_detected.browser) {
+           m = ua.match(/(opera|chrome|safari|firefox|msie)\/?\s*(\.?\d+(\.\d+)*)/i);
 
-             if (!isNaN(dist) && dist > maxDistance) {
-               maxDistance = dist;
-             }
+           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 (maxDistance < 0.0001) {
-             return 'straight_enough';
-           }
-         };
+         if (!_detected.browser) {
+           _detected.browser = navigator.appName;
+           _detected.version = navigator.appVersion;
+         } // keep major.minor version only..
 
-         action.transitionable = true;
-         return action;
-       }
 
-       /*
-        * Based on https://github.com/openstreetmap/potlatch2/net/systemeD/potlatch2/tools/Straighten.as
-        */
+         _detected.version = _detected.version.split(/\W/).slice(0, 2).join('.'); // detect other browser capabilities
+         // Legacy Opera has incomplete svg style support. See #715
 
-       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
+         _detected.opera = _detected.browser.toLowerCase() === 'opera' && parseFloat(_detected.version) < 15;
 
+         if (_detected.browser.toLowerCase() === 'msie') {
+           _detected.ie = true;
+           _detected.browser = 'Internet Explorer';
+           _detected.support = parseFloat(_detected.version) >= 11;
+         } else {
+           _detected.ie = false;
+           _detected.support = true;
+         }
 
-         function 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';
-           });
+         _detected.filedrop = window.FileReader && 'ondrop' in window;
+         _detected.download = !(_detected.ie || _detected.browser.toLowerCase() === 'edge');
+         _detected.cssfilters = !(_detected.ie || _detected.browser.toLowerCase() === 'edge');
+         /* Platform */
 
-           for (var i = 0; i < selectedWays.length; i++) {
-             var way = graph.entity(selectedWays[i]);
-             nodes = way.nodes.slice(0);
-             remainingWays.push(nodes);
-             startNodes.push(nodes[0]);
-             endNodes.push(nodes[nodes.length - 1]);
-           } // Remove duplicate end/startNodes (duplicate nodes cannot be at the line end,
-           //   and need to be removed so currNode difference calculation below works)
-           // i.e. ["n-1", "n-1", "n-2"] => ["n-2"]
+         if (/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.
 
-           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
+         _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 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 loc = window.top.location;
+         var origin = loc.origin;
 
-           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 (!origin) {
+           // for unpatched IE11
+           origin = loc.protocol + '//' + loc.hostname + (loc.port ? ':' + loc.port : '');
+         }
 
+         _detected.host = origin + loc.pathname;
+         return _detected;
+       }
 
-           while (remainingWays.length) {
-             nextWay = getNextWay(currNode, remainingWays);
-             remainingWays = utilArrayDifference(remainingWays, [nextWay]);
+       // 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;
+           }
 
-             if (nextWay[0] !== currNode) {
-               nextWay.reverse();
+           function valueConstant() {
+             if (this.value !== value) {
+               this.value = value;
              }
+           }
 
-             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 valueFunction() {
+             var x = value.apply(this, arguments);
 
-           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);
+             if (x === null || x === undefined) {
+               delete this.value;
+             } else if (this.value !== x) {
+               this.value = x;
+             }
            }
 
-           return nodes.map(function (n) {
-             return graph.entity(n);
-           });
+           return value === null || value === undefined ? valueNull : typeof value === 'function' ? valueFunction : valueConstant;
          }
 
-         function shouldKeepNode(node, graph) {
-           return graph.parentWays(node).length > 1 || graph.parentRelations(node).length || node.hasInterestingTags();
+         if (arguments.length === 1) {
+           return selection.property('value');
          }
 
-         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;
+         return selection.each(d3_selection_value(value));
+       }
 
-           for (i = 1; i < points.length - 1; i++) {
-             var node = nodes[i];
-             var point = points[i];
+       function utilKeybinding(namespace) {
+         var _keybindings = {};
 
-             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 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 < toDelete.length; i++) {
-             graph = actionDeleteNode(toDelete[i].id)(graph);
-           }
+           for (i = 0; i < bindings.length; i++) {
+             binding = bindings[i];
+             if (!binding.event.modifiers.shiftKey) continue; // no shift
 
-           return graph;
-         };
+             if (!!binding.capture !== isCapturing) continue;
 
-         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 (matches(d3_event, binding, true)) {
+               binding.callback(d3_event);
+               didMatch = true; // match a max of one binding per event
 
-           if (threshold === 0) {
-             return 'too_bendy';
+               break;
+             }
            }
 
-           var maxDistance = 0;
+           if (didMatch) return; // then unshifted keybindings
 
-           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
+           for (i = 0; i < bindings.length; i++) {
+             binding = bindings[i];
+             if (binding.event.modifiers.shiftKey) continue; // shift
 
-             if (isNaN(dist) || dist > threshold) {
-               return 'too_bendy';
-             } else if (dist > maxDistance) {
-               maxDistance = dist;
+             if (!!binding.capture !== isCapturing) continue;
+
+             if (matches(d3_event, binding, false)) {
+               binding.callback(d3_event);
+               break;
              }
            }
 
-           var keepingAllNodes = nodes.every(function (node, i) {
-             return i === 0 || i === nodes.length - 1 || shouldKeepNode(node, graph);
-           });
-
-           if (maxDistance < 0.0001 && // Allow straightening even if already straight in order to remove extraneous nodes
-           keepingAllNodes) {
-             return 'straight_enough';
-           }
-         };
+           function matches(d3_event, binding, testShift) {
+             var event = d3_event;
+             var isMatch = false;
+             var tryKeyCode = true; // Prefer a match on `KeyboardEvent.key`
 
-         action.transitionable = true;
-         return action;
-       }
+             if (event.key !== undefined) {
+               tryKeyCode = event.key.charCodeAt(0) > 255; // outside ISO-Latin-1
 
-       //
-       // `turn` must be an `osmTurn` object with a `restrictionID` property.
-       // see osm/intersection.js, pathToTurn()
-       //
+               isMatch = true;
 
-       function actionUnrestrictTurn(turn) {
-         return function (graph) {
-           return actionDeleteRelation(turn.restrictionID)(graph);
-         };
-       }
+               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?)
 
-       /* Reflect the given area around its axis of symmetry */
 
-       function actionReflect(reflectIds, projection) {
-         var _useLongAxis = true;
+             if (!isMatch && tryKeyCode) {
+               isMatch = event.keyCode === binding.event.keyCode;
+             }
 
-         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.
+             if (!isMatch) return false; // test modifier keys
 
-           var p1 = [(ssr.poly[0][0] + ssr.poly[1][0]) / 2, (ssr.poly[0][1] + ssr.poly[1][1]) / 2];
-           var q1 = [(ssr.poly[2][0] + ssr.poly[3][0]) / 2, (ssr.poly[2][1] + ssr.poly[3][1]) / 2];
-           var p2 = [(ssr.poly[3][0] + ssr.poly[4][0]) / 2, (ssr.poly[3][1] + ssr.poly[4][1]) / 2];
-           var q2 = [(ssr.poly[1][0] + ssr.poly[2][0]) / 2, (ssr.poly[1][1] + ssr.poly[2][1]) / 2];
-           var p, q;
-           var isLong = geoVecLength(p1, q1) > geoVecLength(p2, q2);
+             if (!(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 (_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
+             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);
+         }
 
-           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 bubble(d3_event) {
+           var tagName = select(d3_event.target).node().tagName;
 
-           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);
+           if (tagName === 'INPUT' || tagName === 'SELECT' || tagName === 'TEXTAREA') {
+             return;
            }
 
-           return graph;
-         };
+           testBindings(d3_event, false);
+         }
 
-         action.useLongAxis = function (val) {
-           if (!arguments.length) return _useLongAxis;
-           _useLongAxis = val;
-           return action;
+         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;
          };
 
-         action.transitionable = true;
-         return action;
-       }
+         keybinding.clear = function () {
+           _keybindings = {};
+           return keybinding;
+         }; // Remove one or more keycode bindings.
 
-       function actionUpgradeTags(entityId, oldTags, replaceTags) {
-         return function (graph) {
-           var entity = graph.entity(entityId);
-           var tags = Object.assign({}, entity.tags); // shallow copy
 
-           var transferValue;
-           var semiIndex;
+         keybinding.off = function (codes, capture) {
+           var arr = utilArrayUniq([].concat(codes));
 
-           for (var oldTagKey in oldTags) {
-             if (!(oldTagKey in tags)) continue; // wildcard match
+           for (var i = 0; i < arr.length; i++) {
+             var id = arr[i] + (capture ? '-capture' : '-bubble');
+             delete _keybindings[id];
+           }
 
-             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]);
+           return keybinding;
+         }; // Add one or more keycode bindings.
 
-               if (vals.length === 1 || oldIndex === -1) {
-                 delete tags[oldTagKey];
-               } else {
-                 if (replaceTags && replaceTags[oldTagKey]) {
-                   // replacing a value within a semicolon-delimited value, note the index
-                   semiIndex = oldIndex;
-                 }
 
-                 vals.splice(oldIndex, 1);
-                 tags[oldTagKey] = vals.join(';');
+         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
              }
-           }
 
-           if (replaceTags) {
-             for (var replaceKey in replaceTags) {
-               var replaceValue = replaceTags[replaceKey];
+             _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 (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;
+               if (matches[j] in utilKeybinding.modifierCodes) {
+                 var prop = utilKeybinding.modifierProperties[utilKeybinding.modifierCodes[matches[j]]];
+                 binding.event.modifiers[prop] = true;
                } else {
-                 if (tags[replaceKey] && oldTags[replaceKey] && semiIndex !== undefined) {
-                   // don't override preexisting values
-                   var existingVals = tags[replaceKey].split(';').filter(Boolean);
+                 binding.event.key = utilKeybinding.keys[matches[j]] || matches[j];
 
-                   if (existingVals.indexOf(replaceValue) === -1) {
-                     existingVals.splice(semiIndex, 0, replaceValue);
-                     tags[replaceKey] = existingVals.join(';');
-                   }
-                 } else {
-                   tags[replaceKey] = replaceValue;
+                 if (matches[j] in utilKeybinding.keyCodes) {
+                   binding.event.keyCode = utilKeybinding.keyCodes[matches[j]];
                  }
                }
              }
            }
 
-           return graph.replace(entity.update({
-             tags: tags
-           }));
+           return keybinding;
          };
+
+         return keybinding;
        }
+       /*
+        * See https://github.com/keithamus/jwerty
+        */
 
-       function behaviorEdit(context) {
-         function behavior() {
-           context.map().minzoom(context.minEditableZoom());
-         }
+       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
 
-         behavior.off = function () {
-           context.map().minzoom(0);
-         };
+       var i = 95,
+           n = 0;
 
-         return behavior;
-       }
+       while (++i < 106) {
+         utilKeybinding.keyCodes['num-' + n] = i;
+         ++n;
+       } // 0-9
 
-       /*
-          The hover behavior adds the `.hover` class on pointerover to all elements to which
-          the identical datum is bound, and removes it on pointerout.
 
-          The :hover pseudo-class is insufficient for iD's purposes because a datum's visual
-          representation may consist of several elements scattered throughout the DOM hierarchy.
-          Only one of these elements can have the :hover pseudo-class, but all of them will
-          have the .hover class.
-        */
+       i = 47;
+       n = 0;
 
-       function behaviorHover(context) {
-         var dispatch$1 = dispatch('hover');
+       while (++i < 58) {
+         utilKeybinding.keyCodes[n] = i;
+         ++n;
+       } // F1-F25
 
-         var _selection = select(null);
 
-         var _newNodeId = null;
-         var _initialNodeID = null;
+       i = 111;
+       n = 1;
 
-         var _altDisables;
+       while (++i < 136) {
+         utilKeybinding.keyCodes['f' + n] = i;
+         ++n;
+       } // a-z
 
-         var _ignoreVertex;
 
-         var _targets = []; // use pointer events on supported platforms; fallback to mouse events
+       i = 64;
 
-         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+       while (++i < 91) {
+         utilKeybinding.keyCodes[String.fromCharCode(i).toLowerCase()] = i;
+       }
 
-         function keydown(d3_event) {
-           if (_altDisables && d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
-             _selection.selectAll('.hover').classed('hover-suppressed', true).classed('hover', false);
+       function utilObjectOmit(obj, omitKeys) {
+         return Object.keys(obj).reduce(function (result, key) {
+           if (omitKeys.indexOf(key) === -1) {
+             result[key] = obj[key]; // keep
+           }
 
-             _selection.classed('hover-disabled', true);
+           return result;
+         }, {});
+       }
 
-             dispatch$1.call('hover', this, null);
-           }
+       // 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]);
          }
 
-         function keyup(d3_event) {
-           if (_altDisables && d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
-             _selection.selectAll('.hover-suppressed').classed('hover-suppressed', false).classed('hover', true);
+         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.
 
-             _selection.classed('hover-disabled', false);
+       function d3_rebind(target, source, method) {
+         return function () {
+           var value = method.apply(source, arguments);
+           return value === source ? target : value;
+         };
+       }
 
-             dispatch$1.call('hover', this, _targets);
-           }
+       // 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';
          }
 
-         function behavior(selection) {
-           _selection = selection;
-           _targets = [];
+         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;
+         };
 
-           if (_initialNodeID) {
-             _newNodeId = _initialNodeID;
-             _initialNodeID = null;
-           } else {
-             _newNodeId = null;
-           }
+         mutex.unlock = function () {
+           if (!intervalID) return;
+           document.cookie = name + '=; expires=Thu, 01 Jan 1970 00:00:00 GMT; sameSite=strict';
+           clearInterval(intervalID);
+           intervalID = null;
+         };
 
-           _selection.on(_pointerPrefix + 'over.hover', pointerover).on(_pointerPrefix + 'out.hover', pointerout) // treat pointerdown as pointerover for touch devices
-           .on(_pointerPrefix + 'down.hover', pointerover);
+         mutex.locked = function () {
+           return !!intervalID;
+         };
 
-           select(window).on(_pointerPrefix + 'up.hover pointercancel.hover', pointerout, true).on('keydown.hover', keydown).on('keyup.hover', keyup);
+         return mutex;
+       }
 
-           function eventTarget(d3_event) {
-             var datum = d3_event.target && d3_event.target.__data__;
-             if (_typeof(datum) !== 'object') return null;
+       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;
 
-             if (!(datum instanceof osmEntity) && datum.properties && datum.properties.entity instanceof osmEntity) {
-               return datum.properties.entity;
-             }
+         function clamp(num, min, max) {
+           return Math.max(min, Math.min(num, max));
+         }
 
-             return datum;
+         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;
            }
 
-           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);
+           return false;
+         }
 
-             if (target && _targets.indexOf(target) === -1) {
-               _targets.push(target);
+         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 = [];
 
-               updateHover(d3_event, _targets);
+           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
+               }
              }
            }
 
-           function pointerout(d3_event) {
-             var target = eventTarget(d3_event);
-
-             var index = _targets.indexOf(target);
+           tiles.translate = origin;
+           tiles.scale = k;
+           return tiles;
+         }
+         /**
+          * getTiles() returns an array of tiles that cover the map view
+          */
 
-             if (index !== -1) {
-               _targets.splice(index);
 
-               updateHover(d3_event, _targets);
+         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;
              }
-           }
 
-           function allowsVertex(d) {
-             return d.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(d, context.graph());
-           }
+             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
+          */
 
-           function modeAllowsHover(target) {
-             var mode = context.mode();
 
-             if (mode.id === 'add-point') {
-               return mode.preset.matchGeometry('vertex') || target.type !== 'way' && target.geometry(context.graph()) !== 'vertex';
-             }
+         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
+           };
+         };
 
-             return true;
-           }
+         tiler.tileSize = function (val) {
+           if (!arguments.length) return _tileSize;
+           _tileSize = val;
+           return tiler;
+         };
 
-           function updateHover(d3_event, targets) {
-             _selection.selectAll('.hover').classed('hover', false);
+         tiler.zoomExtent = function (val) {
+           if (!arguments.length) return _zoomExtent;
+           _zoomExtent = val;
+           return tiler;
+         };
 
-             _selection.selectAll('.hover-suppressed').classed('hover-suppressed', false);
+         tiler.size = function (val) {
+           if (!arguments.length) return _size;
+           _size = val;
+           return tiler;
+         };
 
-             var mode = context.mode();
+         tiler.scale = function (val) {
+           if (!arguments.length) return _scale;
+           _scale = val;
+           return tiler;
+         };
 
-             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;
-             }
+         tiler.translate = function (val) {
+           if (!arguments.length) return _translate;
+           _translate = val;
+           return tiler;
+         }; // number to extend the rows/columns beyond those covering the viewport
 
-             targets = targets.filter(function (datum) {
-               if (datum instanceof osmEntity) {
-                 // If drawing a way, don't hover on a node that was just placed. #3974
-                 return datum.id !== _newNodeId && (datum.type !== 'node' || !_ignoreVertex || allowsVertex(datum)) && modeAllowsHover(datum);
-               }
 
-               return true;
-             });
-             var selector = '';
+         tiler.margin = function (val) {
+           if (!arguments.length) return _margin;
+           _margin = +val;
+           return tiler;
+         };
 
-             for (var i in targets) {
-               var datum = targets[i]; // What are we hovering over?
+         tiler.skipNullIsland = function (val) {
+           if (!arguments.length) return _skipNullIsland;
+           _skipNullIsland = val;
+           return tiler;
+         };
 
-               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;
+         return tiler;
+       }
 
-                 if (datum.type === 'relation') {
-                   for (var j in datum.members) {
-                     selector += ', .' + datum.members[j].id;
-                   }
-                 }
-               }
-             }
+       function utilTriggerEvent(target, type) {
+         target.each(function () {
+           var evt = document.createEvent('HTMLEvents');
+           evt.initEvent(type, true, true);
+           this.dispatchEvent(evt);
+         });
+       }
 
-             var suppressed = _altDisables && d3_event && d3_event.altKey;
+       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
+       //
 
-             if (selector.trim().length) {
-               // remove the first comma
-               selector = selector.slice(1);
+       function coreLocations() {
+         var _this = {};
+         var _resolvedFeatures = {}; // cache of *resolved* locationSet features
 
-               _selection.selectAll(selector).classed(suppressed ? 'hover-suppressed' : 'hover', true);
-             }
+         var _loco = new _default(); // instance of a location-conflation resolver
 
-             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);
-         };
+         var _wp; // instance of a which-polygon index
+         // pre-resolve the worldwide locationSet
 
-         behavior.altDisables = function (val) {
-           if (!arguments.length) return _altDisables;
-           _altDisables = val;
-           return behavior;
-         };
 
-         behavior.ignoreVertex = function (val) {
-           if (!arguments.length) return _ignoreVertex;
-           _ignoreVertex = val;
-           return behavior;
+         var world = {
+           locationSet: {
+             include: ['Q2']
+           }
          };
+         resolveLocationSet(world);
+         rebuildIndex();
+         var _queue = [];
 
-         behavior.initialNodeID = function (nodeId) {
-           _initialNodeID = nodeId;
-           return behavior;
-         };
+         var _deferred = new Set();
 
-         return utilRebind(behavior, dispatch$1, 'on');
-       }
+         var _inProcess; // Returns a Promise to process the queue
 
-       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 processQueue() {
+           if (!_queue.length) return Promise.resolve(); // console.log(`queue length ${_queue.length}`);
 
-         var _edit = behaviorEdit(context);
+           var chunk = _queue.pop();
 
-         var _closeTolerance = 4;
-         var _tolerance = 12;
-         var _mouseLeave = false;
-         var _lastMouse = null;
+           return new Promise(function (resolvePromise) {
+             var handle = window.requestIdleCallback(function () {
+               _deferred["delete"](handle); // const t0 = performance.now();
 
-         var _lastPointerUpEvent;
 
-         var _downPointer; // use pointer events on supported platforms; fallback to mouse events
+               chunk.forEach(resolveLocationSet); // const t1 = performance.now();
+               // console.log('chunk processed in ' + (t1 - t0) + ' ms');
 
+               resolvePromise();
+             });
 
-         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse'; // related code
-         // - `mode/drag_node.js` `datum()`
+             _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 datum(d3_event) {
-           var mode = context.mode();
-           var isNote = mode && mode.id.indexOf('note') !== -1;
-           if (d3_event.altKey || isNote) return {};
-           var element;
+         function resolveLocationSet(obj) {
+           if (obj.locationSetID) return; // work was done already
 
-           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)
+           try {
+             var locationSet = obj.locationSet;
 
+             if (!locationSet) {
+               throw new Error('object missing locationSet property');
+             }
 
-           var d = element.__data__;
-           return d && d.properties && d.properties.target ? d : {};
-         }
+             if (!locationSet.include) {
+               // missing `include`, default to worldwide include
+               locationSet.include = ['Q2']; // https://github.com/openstreetmap/iD/pull/8305#discussion_r662344647
+             }
 
-         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 resolved = _loco.resolveLocationSet(locationSet);
 
-         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);
+             var locationSetID = resolved.id;
+             obj.locationSetID = locationSetID;
 
-           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);
-           }
-         }
+             if (!resolved.feature.geometry.coordinates.length || !resolved.feature.properties.area) {
+               throw new Error("locationSet ".concat(locationSetID, " resolves to an empty feature."));
+             }
 
-         function pointermove(d3_event) {
-           if (_downPointer && _downPointer.id === (d3_event.pointerId || 'mouse') && !_downPointer.isCancelled) {
-             var p2 = _downPointer.pointerLocGetter(d3_event);
+             if (!_resolvedFeatures[locationSetID]) {
+               // First time seeing this locationSet feature
+               var feature = JSON.parse(JSON.stringify(resolved.feature)); // deep clone
 
-             var dist = geoVecLength(_downPointer.downLoc, p2);
+               feature.id = locationSetID; // Important: always use the locationSet `id` (`+[Q30]`), not the feature `id` (`Q30`)
 
-             if (dist >= _closeTolerance) {
-               _downPointer.isCancelled = true;
-               dispatch$1.call('downcancel', this);
+               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.
 
-           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 (_lastPointerUpEvent && _lastPointerUpEvent.pointerType !== 'mouse' && d3_event.timeStamp - _lastPointerUpEvent.timeStamp < 100) return;
-           _lastMouse = d3_event;
-           dispatch$1.call('move', this, d3_event, datum(d3_event));
-         }
+         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": { … }
+         //      }
+         //    ]
+         //  }
+         //
 
-         function pointercancel(d3_event) {
-           if (_downPointer && _downPointer.id === (d3_event.pointerId || 'mouse')) {
-             if (!_downPointer.isCancelled) {
-               dispatch$1.call('downcancel', this);
-             }
 
-             _downPointer = null;
-           }
-         }
+         _this.mergeCustomGeoJSON = function (fc) {
+           if (fc && fc.type === 'FeatureCollection' && Array.isArray(fc.features)) {
+             fc.features.forEach(function (feature) {
+               feature.properties = feature.properties || {};
+               var props = feature.properties; // Get `id` from either `id` or `properties`
 
-         function mouseenter() {
-           _mouseLeave = false;
-         }
+               var id = feature.id || props.id;
+               if (!id || !/^\S+\.geojson$/i.test(id)) return; // Ensure `id` exists and is lowercase
 
-         function mouseleave() {
-           _mouseLeave = true;
-         }
+               id = id.toLowerCase();
+               feature.id = id;
+               props.id = id; // Ensure `area` property exists
 
-         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()`
+               if (!props.area) {
+                 var area = geojsonArea.geometry(feature.geometry) / 1e6; // m² to km²
 
+                 props.area = Number(area.toFixed(2));
+               }
 
-         function click(d3_event, loc) {
-           var d = datum(d3_event);
-           var target = d && d.properties && d.properties.entity;
-           var mode = context.mode();
+               _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.
+         //
 
-           if (target && target.type === 'node' && allowsVertex(target)) {
-             // Snap to a node
-             dispatch$1.call('clickNode', this, target, d);
-             return;
-           } else if (target && target.type === 'way' && (mode.id !== 'add-point' || mode.preset.matchGeometry('vertex'))) {
-             // Snap to a way
-             var choice = geoChooseEdge(context.graph().childNodes(target), loc, context.projection, context.activeID());
 
-             if (choice) {
-               var edge = [target.nodes[choice.index - 1], target.nodes[choice.index]];
-               dispatch$1.call('clickWay', this, choice.loc, edge, d);
-               return;
-             }
-           } else if (mode.id !== 'add-point' || mode.preset.matchGeometry('point')) {
-             var locLatLng = context.projection.invert(loc);
-             dispatch$1.call('click', this, locLatLng, d);
+         _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;
+             });
            }
-         } // treat a spacebar press like a click
 
+           return _inProcess;
+         }; //
+         // `locationSetID`
+         // Returns a locationSetID for a given locationSet (fallback to `+[Q2]`, world)
+         // (The locationset doesn't necessarily need to be resolved to compute its `id`)
+         //
+         // Arguments
+         //   `locationSet`: A locationSet, e.g. `{ include: ['us'] }`
+         // Returns
+         //   The locationSetID, e.g. `+[Q30]`
+         //
 
-         function space(d3_event) {
-           d3_event.preventDefault();
-           d3_event.stopPropagation();
-           var currSpace = context.map().mouse();
 
-           if (_disableSpace && _lastSpace) {
-             var dist = geoVecLength(_lastSpace, currSpace);
+         _this.locationSetID = function (locationSet) {
+           var locationSetID;
 
-             if (dist > _tolerance) {
-               _disableSpace = false;
-             }
+           try {
+             locationSetID = _loco.validateLocationSet(locationSet).id;
+           } catch (err) {
+             locationSetID = '+[Q2]'; // the world
            }
 
-           if (_disableSpace || _mouseLeave || !_lastMouse) return; // user must move mouse or release space bar to allow another click
+           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: { … }
+         //   }
 
-           _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
 
-           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);
-         }
+         _this.feature = function (locationSetID) {
+           return _resolvedFeatures[locationSetID] || _resolvedFeatures['+[Q2]'];
+         }; //
+         // `locationsAt`
+         // Find all the resolved locationSets valid at the given location.
+         // Results include the area (in km²) to facilitate sorting.
+         //
+         // Arguments
+         //   `loc`: the [lon,lat] location to query, e.g. `[-74.4813, 40.7967]`
+         // Returns
+         //   Object of locationSetIDs to areas (in km²)
+         //   {
+         //     "+[Q2]": 511207893.3958111,
+         //     "+[Q30]": 21817019.17,
+         //     "+[new_jersey.geojson]": 22390.77,
+         //     …
+         //   }
+         //
 
-         function backspace(d3_event) {
-           d3_event.preventDefault();
-           dispatch$1.call('undo');
-         }
 
-         function del(d3_event) {
-           d3_event.preventDefault();
-           dispatch$1.call('cancel');
-         }
+         _this.locationsAt = function (loc) {
+           var result = {};
+           (_wp(loc, true) || []).forEach(function (prop) {
+             return result[prop.id] = prop.area;
+           });
+           return result;
+         }; //
+         // `query`
+         // Execute a query directly against which-polygon
+         // https://github.com/mapbox/which-polygon
+         //
+         // Arguments
+         //   `loc`: the [lon,lat] location to query,
+         //   `multi`: `true` to return all results, `false` to return first result
+         // Returns
+         //   Array of GeoJSON *properties* for the locationSet features that exist at `loc`
+         //
 
-         function ret(d3_event) {
-           d3_event.preventDefault();
-           dispatch$1.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;
-         }
+         _this.query = function (loc, multi) {
+           return _wp(loc, multi);
+         }; // Direct access to the location-conflation resolver
 
-         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);
-         };
+         _this.loco = function () {
+           return _loco;
+         }; // Direct access to the which-polygon index
 
-         behavior.hover = function () {
-           return _hover;
+
+         _this.wp = function () {
+           return _wp;
          };
 
-         return utilRebind(behavior, dispatch$1, 'on');
+         return _this;
        }
 
-       function initRange(domain, range) {
-         switch (arguments.length) {
-           case 0:
-             break;
+       var $findIndex = arrayIteration.findIndex;
 
-           case 1:
-             this.range(domain);
-             break;
 
-           default:
-             this.range(range).domain(domain);
-             break;
-         }
+       var FIND_INDEX = 'findIndex';
+       var SKIPS_HOLES = true;
 
-         return this;
-       }
+       // Shouldn't skip holes
+       if (FIND_INDEX in []) Array(1)[FIND_INDEX](function () { SKIPS_HOLES = false; });
 
-       function constants(x) {
-         return function () {
-           return x;
-         };
-       }
+       // `Array.prototype.findIndex` method
+       // https://tc39.es/ecma262/#sec-array.prototype.findindex
+       _export({ target: 'Array', proto: true, forced: SKIPS_HOLES }, {
+         findIndex: function findIndex(callbackfn /* , that = undefined */) {
+           return $findIndex(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+         }
+       });
 
-       function number$1(x) {
-         return +x;
-       }
+       // https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
+       addToUnscopables(FIND_INDEX);
 
-       var unit = [0, 1];
-       function identity$3(x) {
-         return x;
-       }
+       var notARegexp = function (it) {
+         if (isRegexp(it)) {
+           throw TypeError("The method doesn't accept regular expressions");
+         } return it;
+       };
 
-       function normalize$1(a, b) {
-         return (b -= a = +a) ? function (x) {
-           return (x - a) / b;
-         } : constants(isNaN(b) ? NaN : 0.5);
-       }
+       var MATCH = wellKnownSymbol('match');
 
-       function clamper(a, b) {
-         var t;
-         if (a > b) t = a, a = b, b = t;
-         return function (x) {
-           return Math.max(a, Math.min(b, x));
-         };
-       } // normalize(a, b)(x) takes a domain value x in [a,b] and returns the corresponding parameter t in [0,1].
-       // interpolate(a, b)(t) takes a parameter t in [0,1] and returns the corresponding range value x in [a,b].
+       var 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;
+       };
 
+       // `String.prototype.includes` method
+       // https://tc39.es/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);
+         }
+       });
 
-       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));
-         };
-       }
+       var _mainLocalizer = coreLocalizer(); // singleton
 
-       function polymap(domain, range, interpolate) {
-         var j = Math.min(domain.length, range.length) - 1,
-             d = new Array(j),
-             r = new Array(j),
-             i = -1; // Reverse descending domains.
 
-         if (domain[j] < domain[0]) {
-           domain = domain.slice().reverse();
-           range = range.slice().reverse();
-         }
+       var _t = _mainLocalizer.t;
+       // coreLocalizer manages language and locale parameters including translated strings
+       //
 
-         while (++i < j) {
-           d[i] = normalize$1(domain[i], domain[i + 1]);
-           r[i] = interpolate(range[i], range[i + 1]);
-         }
+       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: {…} },
+         // …
+         // }
 
-         return function (x) {
-           var i = bisectRight(domain, x, 1, j) - 1;
-           return r[i](d[i](x));
-         };
-       }
+         var _dataLocales = {}; // `localeStrings` is an object containing all _loaded_ locale codes -> string data.
+         // {
+         // en: { icons: {…}, toolbar: {…}, modes: {…}, operations: {…}, … },
+         // de: { icons: {…}, toolbar: {…}, modes: {…}, operations: {…}, … },
+         // …
+         // }
 
-       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;
+         var _localeStrings = {}; // the current locale
 
-         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;
-         }
+         var _localeCode = 'en-US'; // `_localeCodes` must contain `_localeCode` first, optionally followed by fallbacks
 
-         function scale(x) {
-           return isNaN(x = +x) ? unknown : (output || (output = piecewise(domain.map(transform), range, interpolate$1)))(transform(clamp(x)));
-         }
+         var _localeCodes = ['en-US', 'en'];
+         var _languageCode = 'en';
+         var _textDirection = 'ltr';
+         var _usesMetric = false;
+         var _languageNames = {};
+         var _scriptNames = {}; // getters for the current locale parameters
 
-         scale.invert = function (y) {
-           return clamp(untransform((input || (input = piecewise(range, domain.map(transform), d3_interpolateNumber)))(y)));
+         localizer.localeCode = function () {
+           return _localeCode;
          };
 
-         scale.domain = function (_) {
-           return arguments.length ? (domain = Array.from(_, number$1), rescale()) : domain.slice();
+         localizer.localeCodes = function () {
+           return _localeCodes;
          };
 
-         scale.range = function (_) {
-           return arguments.length ? (range = Array.from(_), rescale()) : range.slice();
+         localizer.languageCode = function () {
+           return _languageCode;
          };
 
-         scale.rangeRound = function (_) {
-           return range = Array.from(_), interpolate$1 = interpolateRound, rescale();
+         localizer.textDirection = function () {
+           return _textDirection;
          };
 
-         scale.clamp = function (_) {
-           return arguments.length ? (clamp = _ ? true : identity$3, rescale()) : clamp !== identity$3;
+         localizer.usesMetric = function () {
+           return _usesMetric;
          };
 
-         scale.interpolate = function (_) {
-           return arguments.length ? (interpolate$1 = _, rescale()) : interpolate$1;
+         localizer.languageNames = function () {
+           return _languageNames;
          };
 
-         scale.unknown = function (_) {
-           return arguments.length ? (unknown = _, scale) : unknown;
-         };
+         localizer.scriptNames = function () {
+           return _scriptNames;
+         }; // The client app may want to manually set the locale, regardless of the
+         // settings provided by the browser
 
-         return function (t, u) {
-           transform = t, untransform = u;
-           return rescale();
-         };
-       }
-       function continuous() {
-         return transformer$1()(identity$3, identity$3);
-       }
 
-       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].
+         var _preferredLocaleCodes = [];
 
-       function formatDecimalParts(x, p) {
-         if ((i = (x = p ? x.toExponential(p - 1) : x.toExponential()).indexOf("e")) < 0) return null; // NaN, ±Infinity
+         localizer.preferredLocaleCodes = function (codes) {
+           if (!arguments.length) return _preferredLocaleCodes;
 
-         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 (typeof codes === 'string') {
+             // be generous and accept delimited strings as input
+             _preferredLocaleCodes = codes.split(/,|;| /gi).filter(Boolean);
+           } else {
+             _preferredLocaleCodes = codes;
+           }
 
-         return [coefficient.length > 1 ? coefficient[0] + coefficient.slice(2) : coefficient, +x.slice(i + 1)];
-       }
+           return localizer;
+         };
 
-       function exponent (x) {
-         return x = formatDecimalParts(Math.abs(x)), x ? x[1] : NaN;
-       }
+         var _loadPromise;
 
-       function formatGroup (grouping, thousands) {
-         return function (value, width) {
-           var i = value.length,
-               t = [],
-               j = 0,
-               g = grouping[0],
-               length = 0;
+         localizer.ensureLoaded = function () {
+           if (_loadPromise) return _loadPromise;
+           var filesToFetch = [// load the list of languages
+           'languages', // load the list of supported locales
+           'locales'];
+           var localeDirs = {
+             general: 'locales',
+             tagging: 'https://cdn.jsdelivr.net/npm/@openstreetmap/id-tagging-schema@3/dist/translations'
+           };
+           var fileMap = _mainFileFetcher.fileMap();
 
-           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];
+           for (var scopeId in localeDirs) {
+             var key = "locales_index_".concat(scopeId);
+             fileMap[key] = localeDirs[scopeId] + '/index.min.json';
+             filesToFetch.push(key);
            }
 
-           return t.reverse().join(thousands);
-         };
-       }
+           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);
 
-       function formatNumerals (numerals) {
-         return function (value) {
-           return value.replace(/[0-9]/g, function (i) {
-             return numerals[+i];
-           });
-         };
-       }
+             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']);
 
-       // [[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
+             _localeCodes = localesToUseFrom(requestedLocales); // Run iD in the highest-priority locale; the rest are fallbacks
 
-       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 + "";
-       }
+             _localeCode = _localeCodes[0];
+             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
 
-       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;
+               _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
 
-             case "0":
-               if (i0 === 0) i0 = i;
-               i1 = i;
-               break;
 
-             default:
-               if (!+s[i]) break out;
-               if (i0 > 0) i0 = 0;
-               break;
-           }
+         function localesToUseFrom(requestedLocales) {
+           var supportedLocales = _dataLocales;
+           var toUse = [];
+
+           for (var i in requestedLocales) {
+             var locale = requestedLocales[i];
+             if (supportedLocales[locale]) toUse.push(locale);
+
+             if (locale.includes('-')) {
+               // Full locale ('es-ES'), add fallback to the base ('es')
+               var langPart = locale.split('-')[0];
+               if (supportedLocales[langPart]) toUse.push(langPart);
+             }
+           } // remove duplicates
+
+
+           return utilArrayUniq(toUse);
          }
 
-         return i0 > 0 ? s.slice(0, i0) + s.slice(i1 + 1) : s;
-       }
+         function updateForCurrentLocale() {
+           if (!_localeCode) return;
+           _languageCode = _localeCode.split('-')[0];
+           var currentData = _dataLocales[_localeCode] || _dataLocales[_languageCode];
+           var hash = utilStringQs(window.location.hash);
 
-       // `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');
+           if (hash.rtl === 'true') {
+             _textDirection = 'rtl';
+           } else if (hash.rtl === 'false') {
+             _textDirection = 'ltr';
+           } else {
+             _textDirection = currentData && currentData.rtl ? 'rtl' : 'ltr';
+           }
+
+           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';
          }
-         return +value;
-       };
+         /* Locales */
+         // Returns a Promise to load the strings for the requested locale
 
-       // `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 nativeToFixed = 1.0.toFixed;
-       var floor$6 = Math.floor;
+         localizer.loadLocale = function (locale, scopeId, directory) {
+           // US English is the default
+           if (locale.toLowerCase() === 'en-us') locale = 'en';
 
-       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);
-       };
+           if (_localeStrings[scopeId] && _localeStrings[scopeId][locale]) {
+             // already loaded
+             return Promise.resolve(locale);
+           }
 
-       var log$2 = function (x) {
-         var n = 0;
-         var x2 = x;
-         while (x2 >= 4096) {
-           n += 12;
-           x2 /= 4096;
+           var fileMap = _mainFileFetcher.fileMap();
+           var key = "locale_".concat(scopeId, "_").concat(locale);
+           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;
+           });
+         };
+
+         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`
+
+
+         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';
          }
-         while (x2 >= 2) {
-           n += 1;
-           x2 /= 2;
-         } return n;
-       };
+         /**
+         * 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
+         */
 
-       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({});
-       });
 
-       // `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;
+         localizer.tInfo = function (origStringId, replacements, locale) {
+           var stringId = origStringId.trim();
+           var scopeId = 'general';
 
-           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);
-             }
-           };
+           if (stringId[0] === '_') {
+             var split = stringId.split('.');
+             scopeId = split[0].slice(1);
+             stringId = split.slice(1).join('.');
+           }
 
-           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;
-             }
-           };
+           locale = locale || _localeCode;
+           var path = stringId.split('.').map(function (s) {
+             return s.replace(/<TX_DOT>/g, '.');
+           }).reverse();
+           var stringsKey = locale; // US English is the default
 
-           var 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 (stringsKey.toLowerCase() === 'en-us') stringsKey = 'en';
+           var result = _localeStrings && _localeStrings[scopeId] && _localeStrings[scopeId][stringsKey];
 
-           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;
+           while (result !== undefined && path.length) {
+             result = result[path.pop()];
            }
-           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;
+
+           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';
+                 });
+
+                 if (number !== undefined) {
+                   var rule = pluralRule(number, locale);
+
+                   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];
+                   }
+                 }
                }
-               multiply(pow$2(10, j, 1), 0);
-               j = e - 1;
-               while (j >= 23) {
-                 divide(1 << 23);
-                 j -= 23;
+
+               if (typeof result === 'string') {
+                 for (var key in replacements) {
+                   var value = replacements[key];
+
+                   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);
+                 }
                }
-               divide(1 << j);
-               multiply(1, 1);
-               divide(2);
-               result = dataToString();
-             } else {
-               multiply(0, z);
-               multiply(1 << -e, 0);
-               result = dataToString() + stringRepeat.call('0', fractDigits);
              }
+
+             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);
            }
-           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;
-         }
-       });
 
-       var nativeToPrecision = 1.0.toPrecision;
+           if (replacements && 'default' in replacements) {
+             // Fallback to a default value if one is specified in `replacements`
+             return {
+               text: replacements["default"],
+               locale: null
+             };
+           }
 
-       var FORCED$d = fails(function () {
-         // IE7-
-         return nativeToPrecision.call(1, undefined) !== '1';
-       }) || !fails(function () {
-         // V8 ~ Android 4.3-
-         nativeToPrecision.call({});
-       });
+           var missing = "Missing ".concat(locale, " translation: ").concat(origStringId);
+           if (typeof console !== 'undefined') console.error(missing); // eslint-disable-line
 
-       // `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);
-         }
-       });
+           return {
+             text: missing,
+             locale: 'en'
+           };
+         };
 
-       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!
-       }
+         localizer.hasTextForStringId = function (stringId) {
+           return !!localizer.tInfo(stringId, {
+             "default": 'nothing found'
+           }).locale;
+         }; // Returns only the localized text, discarding the locale info
 
-       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);
-         }
-       };
+         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 identity$4 (x) {
-         return x;
-       }
 
-       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 + "";
+         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
+
+
+           if (options && options.localOnly) return null;
+           var langInfo = _dataLanguages[code];
+
+           if (langInfo) {
+             if (langInfo.nativeName) {
+               // name in native language
+               // e.g. "Deutsch (de)"
+               return localizer.t('translate.language_and_code', {
+                 language: langInfo.nativeName,
+                 code: code
+               });
+             } else if (langInfo.base && langInfo.script) {
+               var base = langInfo.base; // the code of the language this is based on
+
+               if (_languageNames[base]) {
+                 // base language name in locale language
+                 var scriptCode = langInfo.script;
+                 var script = _scriptNames[scriptCode] || scriptCode; // e.g. "Serbian (Cyrillic)"
+
+                 return localizer.t('translate.language_and_code', {
+                   language: _languageNames[base],
+                   code: script
+                 });
+               } else if (_dataLanguages[base] && _dataLanguages[base].nativeName) {
+                 // e.g. "српски (sr-Cyrl)"
+                 return localizer.t('translate.language_and_code', {
+                   language: _dataLanguages[base].nativeName,
+                   code: code
+                 });
+               }
+             }
+           }
 
-         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".
+           return code; // if not found, use the code
+         };
 
-           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.
+         return localizer;
+       }
 
-           if (zero || fill === "0" && align === "=") zero = true, fill = "0", align = "="; // Compute the prefix and suffix.
-           // For SI-prefix, the suffix is lazily computed.
+       // `presetCollection` is a wrapper around an `Array` of presets `collection`,
+       // and decorated with some extra methods for searching and matching geometry
+       //
 
-           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?
+       function presetCollection(collection) {
+         var MAXRESULTS = 50;
+         var _this = {};
+         var _memo = {};
+         _this.collection = collection;
 
-           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].
+         _this.item = function (id) {
+           if (_memo[id]) return _memo[id];
 
-           precision = precision === undefined ? 6 : /[gprs]/.test(type) ? Math.max(1, Math.min(21, precision)) : Math.max(0, Math.min(20, precision));
+           var found = _this.collection.find(function (d) {
+             return d.id === id;
+           });
 
-           function format(value) {
-             var valuePrefix = prefix,
-                 valueSuffix = suffix,
-                 i,
-                 n,
-                 c;
+           if (found) _memo[id] = found;
+           return found;
+         };
 
-             if (type === "c") {
-               valueSuffix = formatType(value) + valueSuffix;
-               value = "";
-             } else {
-               value = +value; // Determine the sign. -0 is not less than 0, but 1 / -0 is!
+         _this.index = function (id) {
+           return _this.collection.findIndex(function (d) {
+             return d.id === id;
+           });
+         };
 
-               var valueNegative = value < 0 || 1 / value < 0; // Perform the initial formatting.
+         _this.matchGeometry = function (geometry) {
+           return presetCollection(_this.collection.filter(function (d) {
+             return d.matchGeometry(geometry);
+           }));
+         };
 
-               value = isNaN(value) ? nan : formatType(Math.abs(value), precision); // Trim insignificant zeros.
+         _this.matchAllGeometry = function (geometries) {
+           return presetCollection(_this.collection.filter(function (d) {
+             return d && d.matchAllGeometry(geometries);
+           }));
+         };
 
-               if (trim) value = formatTrim(value); // If a negative value rounds to zero after formatting, and no explicit positive sign is requested, hide the sign.
+         _this.matchAnyGeometry = function (geometries) {
+           return presetCollection(_this.collection.filter(function (d) {
+             return geometries.some(function (geom) {
+               return d.matchGeometry(geom);
+             });
+           }));
+         };
 
-               if (valueNegative && +value === 0 && sign !== "+") valueNegative = false; // Compute the prefix and suffix.
+         _this.fallback = function (geometry) {
+           var id = geometry;
+           if (id === 'vertex') id = 'point';
+           return _this.item(id);
+         };
 
-               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.
+         _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 (maybeSuffix) {
-                 i = -1, n = value.length;
+           value = value.toLowerCase().trim(); // match at name beginning or just after a space (e.g. "office" -> match "Law Office")
 
-                 while (++i < n) {
-                   if (c = value.charCodeAt(i), 48 > c || c > 57) {
-                     valueSuffix = (c === 46 ? decimal + value.slice(i + 1) : value.slice(i)) + valueSuffix;
-                     value = value.slice(0, i);
-                     break;
-                   }
-                 }
-               }
-             } // If the fill character is not "0", grouping is applied before padding.
+           function leading(a) {
+             var index = a.indexOf(value);
+             return index === 0 || a[index - 1] === ' ';
+           } // match at name beginning only
 
 
-             if (comma && !zero) value = group(value, Infinity); // Compute the padding.
+           function leadingStrict(a) {
+             var index = a.indexOf(value);
+             return index === 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.
+           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
 
-             if (comma && zero) value = group(padding + value, padding.length ? width - valueSuffix.length : Infinity), padding = ""; // Reconstruct the final output based on the desired alignment.
+               if (value === aCompare) return -1;
+               if (value === bCompare) return 1; // priority for higher matchScore
 
-             switch (align) {
-               case "<":
-                 value = valuePrefix + value + valueSuffix + padding;
-                 break;
+               var i = b.originalScore - a.originalScore;
+               if (i !== 0) return i; // priority if search string appears earlier in preset name
 
-               case "=":
-                 value = valuePrefix + padding + value + valueSuffix;
-                 break;
+               i = aCompare.indexOf(value) - bCompare.indexOf(value);
+               if (i !== 0) return i; // priority for shorter preset names
 
-               case "^":
-                 value = padding.slice(0, length = padding.length >> 1) + valuePrefix + value + valueSuffix + padding.slice(length);
-                 break;
+               return aCompare.length - bCompare.length;
+             };
+           }
 
-               default:
-                 value = padding + valuePrefix + value + valueSuffix;
-                 break;
-             }
+           var pool = _this.collection;
 
-             return numerals(value);
+           if (Array.isArray(loc)) {
+             var validLocations = _mainLocations.locationsAt(loc);
+             pool = pool.filter(function (a) {
+               return !a.locationSetID || validLocations[a.locationSetID];
+             });
            }
 
-           format.toString = function () {
-             return specifier + "";
-           };
+           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
 
-           return format;
-         }
+           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 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 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
 
-         return {
-           format: newFormat,
-           formatPrefix: formatPrefix
+           var similarName = searchable.map(function (a) {
+             return {
+               preset: a,
+               dist: utilEditDistance(value, a.searchName())
+             };
+           }).filter(function (a) {
+             return a.dist + Math.min(value.length - a.preset.searchName().length, 0) < 3;
+           }).sort(function (a, b) {
+             return a.dist - b.dist;
+           }).map(function (a) {
+             return a.preset;
+           }); // finds close matches to value to preset suggestion name
+
+           var similarSuggestions = suggestions.map(function (a) {
+             return {
+               preset: a,
+               dist: utilEditDistance(value, a.searchName())
+             };
+           }).filter(function (a) {
+             return a.dist + Math.min(value.length - a.preset.searchName().length, 0) < 1;
+           }).sort(function (a, b) {
+             return a.dist - b.dist;
+           }).map(function (a) {
+             return a.preset;
+           }); // finds close matches to value in preset.terms
+
+           var similarTerms = searchable.filter(function (a) {
+             return (a.terms() || []).some(function (b) {
+               return utilEditDistance(value, b) + Math.min(value.length - b.length, 0) < 3;
+             });
+           });
+           var results = leadingNames.concat(leadingSuggestions, leadingNamesStripped, leadingSuggestionsStripped, leadingTerms, leadingSuggestionTerms, leadingTagValues, similarName, similarSuggestions, similarTerms).slice(0, MAXRESULTS - 1);
+
+           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 locale;
-       var format;
-       var formatPrefix;
-       defaultLocale({
-         thousands: ",",
-         grouping: [3],
-         currency: ["$", ""]
-       });
-       function defaultLocale(definition) {
-         locale = formatLocale(definition);
-         format = locale.format;
-         formatPrefix = locale.formatPrefix;
-         return locale;
+         return _this;
        }
 
-       function precisionFixed (step) {
-         return Math.max(0, -exponent(Math.abs(step)));
-       }
+       // `presetCategory` builds a `presetCollection` of member presets,
+       // decorated with some extra methods for searching and matching geometry
+       //
 
-       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 presetCategory(categoryID, category, allPresets) {
+         var _this = Object.assign({}, category); // shallow copy
 
-       function precisionRound (step, max) {
-         step = Math.abs(step), max = Math.abs(max) - step;
-         return Math.max(0, exponent(max) - exponent(step)) + 1;
-       }
 
-       function tickFormat(start, stop, count, specifier) {
-         var step = tickStep(start, stop, count),
-             precision;
-         specifier = formatSpecifier(specifier == null ? ",f" : specifier);
+         var _searchName; // cache
 
-         switch (specifier.type) {
-           case "s":
-             {
-               var value = Math.max(Math.abs(start), Math.abs(stop));
-               if (specifier.precision == null && !isNaN(precision = precisionPrefix(step, value))) specifier.precision = precision;
-               return formatPrefix(specifier, value);
-             }
 
-           case "":
-           case "e":
-           case "g":
-           case "p":
-           case "r":
-             {
-               if (specifier.precision == null && !isNaN(precision = precisionRound(step, Math.max(Math.abs(start), Math.abs(stop))))) specifier.precision = precision - (specifier.type === "e");
-               break;
-             }
+         var _searchNameStripped; // cache
 
-           case "f":
-           case "%":
-             {
-               if (specifier.precision == null && !isNaN(precision = precisionFixed(step))) specifier.precision = precision - (specifier.type === "%") * 2;
-               break;
-             }
-         }
 
-         return format(specifier);
-       }
+         _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];
 
-       function linearish(scale) {
-         var domain = scale.domain;
+             if (acc.indexOf(geometry) === -1) {
+               acc.push(geometry);
+             }
+           }
 
-         scale.ticks = function (count) {
-           var d = domain();
-           return ticks(d[0], d[d.length - 1], count == null ? 10 : count);
+           return acc;
+         }, []);
+
+         _this.matchGeometry = function (geom) {
+           return _this.geometry.indexOf(geom) >= 0;
          };
 
-         scale.tickFormat = function (count, specifier) {
-           var d = domain();
-           return tickFormat(d[0], d[d.length - 1], count == null ? 10 : count, specifier);
+         _this.matchAllGeometry = function (geometries) {
+           return _this.members.collection.some(function (preset) {
+             return preset.matchAllGeometry(geometries);
+           });
          };
 
-         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;
+         _this.matchScore = function () {
+           return -1;
+         };
 
-           if (stop < start) {
-             step = start, start = stop, stop = step;
-             step = i0, i0 = i1, i1 = step;
-           }
+         _this.name = function () {
+           return _t("_tagging.presets.categories.".concat(categoryID, ".name"), {
+             'default': categoryID
+           });
+         };
 
-           while (maxIter-- > 0) {
-             step = tickIncrement(start, stop, count);
+         _this.nameLabel = function () {
+           return _t.html("_tagging.presets.categories.".concat(categoryID, ".name"), {
+             'default': categoryID
+           });
+         };
 
-             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;
-             }
+         _this.terms = function () {
+           return [];
+         };
 
-             prestep = step;
+         _this.searchName = function () {
+           if (!_searchName) {
+             _searchName = (_this.suggestion ? _this.originalName : _this.name()).toLowerCase();
            }
 
-           return scale;
+           return _searchName;
          };
 
-         return scale;
-       }
-       function linear$2() {
-         var scale = continuous();
+         _this.searchNameStripped = function () {
+           if (!_searchNameStripped) {
+             _searchNameStripped = _this.searchName(); // split combined diacritical characters into their parts
 
-         scale.copy = function () {
-           return copy(scale, linear$2());
+             if (_searchNameStripped.normalize) _searchNameStripped = _searchNameStripped.normalize('NFD'); // remove diacritics
+
+             _searchNameStripped = _searchNameStripped.replace(/[\u0300-\u036f]/g, '');
+           }
+
+           return _searchNameStripped;
          };
 
-         initRange.apply(scale, arguments);
-         return linearish(scale);
+         return _this;
        }
 
-       var nativeExpm1 = Math.expm1;
-       var exp$1 = Math.exp;
+       // `presetField` decorates a given `field` Object
+       // with some extra methods for searching and matching geometry
+       //
 
-       // `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 presetField(fieldID, field) {
+         var _this = Object.assign({}, field); // shallow copy
 
-       function quantize() {
-         var x0 = 0,
-             x1 = 1,
-             n = 1,
-             domain = [0.5],
-             range = [0, 1],
-             unknown;
 
-         function scale(x) {
-           return x <= x ? range[bisectRight(domain, x, 0, n)] : unknown;
-         }
+         _this.id = fieldID; // for use in classes, element ids, css selectors
 
-         function rescale() {
-           var i = -1;
-           domain = new Array(n);
+         _this.safeid = utilSafeClassName(fieldID);
 
-           while (++i < n) {
-             domain[i] = ((i + 1) * x1 - (i - n) * x0) / (n + 1);
-           }
+         _this.matchGeometry = function (geom) {
+           return !_this.geometry || _this.geometry.indexOf(geom) !== -1;
+         };
 
-           return scale;
-         }
+         _this.matchAllGeometry = function (geometries) {
+           return !_this.geometry || geometries.every(function (geom) {
+             return _this.geometry.indexOf(geom) !== -1;
+           });
+         };
 
-         scale.domain = function (_) {
-           var _ref, _ref2;
+         _this.t = function (scope, options) {
+           return _t("_tagging.presets.fields.".concat(fieldID, ".").concat(scope), options);
+         };
 
-           return arguments.length ? ((_ref = _, _ref2 = _slicedToArray(_ref, 2), x0 = _ref2[0], x1 = _ref2[1], _ref), x0 = +x0, x1 = +x1, rescale()) : [x0, x1];
+         _this.t.html = function (scope, options) {
+           return _t.html("_tagging.presets.fields.".concat(fieldID, ".").concat(scope), options);
          };
 
-         scale.range = function (_) {
-           return arguments.length ? (n = (range = Array.from(_)).length - 1, rescale()) : range.slice();
+         _this.hasTextForStringId = function (scope) {
+           return _mainLocalizer.hasTextForStringId("_tagging.presets.fields.".concat(fieldID, ".").concat(scope));
          };
 
-         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]];
+         _this.title = function () {
+           return _this.overrideLabel || _this.t('label', {
+             'default': fieldID
+           });
          };
 
-         scale.unknown = function (_) {
-           return arguments.length ? (unknown = _, scale) : scale;
+         _this.label = function () {
+           return _this.overrideLabel || _this.t.html('label', {
+             'default': fieldID
+           });
          };
 
-         scale.thresholds = function () {
-           return domain.slice();
+         var _placeholder = _this.placeholder;
+
+         _this.placeholder = function () {
+           return _this.t('placeholder', {
+             'default': _placeholder
+           });
          };
 
-         scale.copy = function () {
-           return quantize().domain([x0, x1]).range(range).unknown(unknown);
+         _this.originalTerms = (_this.terms || []).join();
+
+         _this.terms = function () {
+           return _this.t('terms', {
+             'default': _this.originalTerms
+           }).toLowerCase().trim().split(/\s*,+\s*/);
          };
 
-         return initRange.apply(linearish(scale), arguments);
+         _this.increment = _this.type === 'number' ? _this.increment || 1 : undefined;
+         return _this;
        }
 
-       // https://github.com/tc39/proposal-string-pad-start-end
+       // `Array.prototype.lastIndexOf` method
+       // https://tc39.es/ecma262/#sec-array.prototype.lastindexof
+       // eslint-disable-next-line es/no-array-prototype-lastindexof -- required for testing
+       _export({ target: 'Array', proto: true, forced: arrayLastIndexOf !== [].lastIndexOf }, {
+         lastIndexOf: arrayLastIndexOf
+       });
 
+       // `presetPreset` decorates a given `preset` Object
+       // with some extra methods for searching and matching geometry
+       //
 
+       function presetPreset(presetID, preset, addable, allFields, allPresets) {
+         allFields = allFields || {};
+         allPresets = allPresets || {};
 
+         var _this = Object.assign({}, preset); // shallow copy
 
-       var ceil$1 = Math.ceil;
 
-       // `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 _addable = addable || false;
 
-       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)
-       };
+         var _resolvedFields; // cache
 
-       var padStart = stringPad.start;
 
-       var abs$3 = Math.abs;
-       var DatePrototype$1 = Date.prototype;
-       var getTime$1 = DatePrototype$1.getTime;
-       var nativeDateToISOString = DatePrototype$1.toISOString;
+         var _resolvedMoreFields; // cache
 
-       // `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;
 
-       // `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
-       });
+         var _searchName; // cache
+
+
+         var _searchNameStripped; // cache
+
+
+         _this.id = presetID;
+         _this.safeid = utilSafeClassName(presetID); // for use in css classes, selectors, element ids
+
+         _this.originalTerms = (_this.terms || []).join();
+         _this.originalName = _this.name || '';
+         _this.originalScore = _this.matchScore || 1;
+         _this.originalReference = _this.reference || {};
+         _this.originalFields = _this.fields || [];
+         _this.originalMoreFields = _this.moreFields || [];
+
+         _this.fields = function () {
+           return _resolvedFields || (_resolvedFields = resolve('fields'));
+         };
+
+         _this.moreFields = function () {
+           return _resolvedMoreFields || (_resolvedMoreFields = resolve('moreFields'));
+         };
+
+         _this.resetFields = function () {
+           return _resolvedFields = _resolvedMoreFields = null;
+         };
+
+         _this.tags = _this.tags || {};
+         _this.addTags = _this.addTags || _this.tags;
+         _this.removeTags = _this.removeTags || _this.addTags;
+         _this.geometry = _this.geometry || [];
+
+         _this.matchGeometry = function (geom) {
+           return _this.geometry.indexOf(geom) >= 0;
+         };
 
-       function behaviorBreathe() {
-         var duration = 800;
-         var steps = 4;
-         var selector = '.selected.shadow, .selected .shadow';
+         _this.matchAllGeometry = function (geoms) {
+           return geoms.every(_this.matchGeometry);
+         };
 
-         var _selected = select(null);
+         _this.matchScore = function (entityTags) {
+           var tags = _this.tags;
+           var seen = {};
+           var score = 0; // match on tags
 
-         var _classed = '';
-         var _params = {};
-         var _done = false;
+           for (var k in tags) {
+             seen[k] = true;
 
-         var _timer;
+             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
 
-         function ratchetyInterpolator(a, b, steps, units) {
-           a = parseFloat(a);
-           b = parseFloat(b);
-           var sample = quantize().domain([0, 1]).range(d3_quantize(d3_interpolateNumber(a, b), steps));
-           return function (t) {
-             return String(sample(t)) + (units || '');
-           };
-         }
 
-         function reset(selection) {
-           selection.style('stroke-opacity', null).style('stroke-width', null).style('fill-opacity', null).style('r', null);
-         }
+           var addTags = _this.addTags;
 
-         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');
-           });
-         }
+           for (var _k in addTags) {
+             if (!seen[_k] && entityTags[_k] === addTags[_k]) {
+               score += _this.originalScore;
+             }
+           }
 
-         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
+           return score;
+         };
 
-             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..
+         _this.t = function (scope, options) {
+           var textID = "_tagging.presets.presets.".concat(presetID, ".").concat(scope);
+           return _t(textID, options);
+         };
 
+         _this.t.html = function (scope, options) {
+           var textID = "_tagging.presets.presets.".concat(presetID, ".").concat(scope);
+           return _t.html(textID, options);
+         };
 
-             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;
+         _this.name = function () {
+           return _this.t('name', {
+             'default': _this.originalName
            });
-         }
+         };
 
-         function run(surface, fromTo) {
-           var toFrom = fromTo === 'from' ? 'to' : 'from';
-           var currSelected = surface.selectAll(selector);
-           var currClassed = surface.attr('class');
+         _this.nameLabel = function () {
+           return _this.t.html('name', {
+             'default': _this.originalName
+           });
+         };
 
-           if (_done || currSelected.empty()) {
-             _selected.call(reset);
+         _this.subtitle = function () {
+           if (_this.suggestion) {
+             var path = presetID.split('/');
+             path.pop(); // remove brand name
 
-             _selected = select(null);
-             return;
+             return _t('_tagging.presets.presets.' + path.join('/') + '.name');
            }
 
-           if (!fastDeepEqual(currSelected.data(), _selected.data()) || currClassed !== _classed) {
-             _selected.call(reset);
+           return null;
+         };
 
-             _classed = currClassed;
-             _selected = currSelected.call(calcAnimationParams);
+         _this.subtitleLabel = function () {
+           if (_this.suggestion) {
+             var path = presetID.split('/');
+             path.pop(); // remove brand name
+
+             return _t.html('_tagging.presets.presets.' + path.join('/') + '.name');
            }
 
-           var didCallNextRun = false;
+           return null;
+         };
 
-           _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
+         _this.terms = function () {
+           return _this.t('terms', {
+             'default': _this.originalTerms
+           }).toLowerCase().trim().split(/\s*,+\s*/);
+         };
 
+         _this.searchName = function () {
+           if (!_searchName) {
+             _searchName = (_this.suggestion ? _this.originalName : _this.name()).toLowerCase();
+           }
 
-             if (!select(this).classed('selected')) {
-               reset(select(this));
-             }
-           });
-         }
+           return _searchName;
+         };
 
-         function behavior(surface) {
-           _done = false;
-           _timer = timer(function () {
-             // wait for elements to actually become selected
-             if (surface.selectAll(selector).empty()) {
-               return false;
-             }
+         _this.searchNameStripped = function () {
+           if (!_searchNameStripped) {
+             _searchNameStripped = _this.searchName(); // split combined diacritical characters into their parts
 
-             surface.call(run, 'from');
+             if (_searchNameStripped.normalize) _searchNameStripped = _searchNameStripped.normalize('NFD'); // remove diacritics
 
-             _timer.stop();
+             _searchNameStripped = _searchNameStripped.replace(/[\u0300-\u036f]/g, '');
+           }
 
-             return true;
-           }, 20);
-         }
+           return _searchNameStripped;
+         };
 
-         behavior.restartIfNeeded = function (surface) {
-           if (_selected.empty()) {
-             surface.call(run, 'from');
+         _this.isFallback = function () {
+           var tagCount = Object.keys(_this.tags).length;
+           return tagCount === 0 || tagCount === 1 && _this.tags.hasOwnProperty('area');
+         };
 
-             if (_timer) {
-               _timer.stop();
-             }
+         _this.addable = function (val) {
+           if (!arguments.length) return _addable;
+           _addable = val;
+           return _this;
+         };
+
+         _this.reference = function () {
+           // Lookup documentation on Wikidata...
+           var qid = _this.tags.wikidata || _this.tags['flag:wikidata'] || _this.tags['brand:wikidata'] || _this.tags['network:wikidata'] || _this.tags['operator:wikidata'];
+
+           if (qid) {
+             return {
+               qid: qid
+             };
+           } // Lookup documentation on OSM Wikibase...
+
+
+           var key = _this.originalReference.key || Object.keys(utilObjectOmit(_this.tags, 'name'))[0];
+           var value = _this.originalReference.value || _this.tags[key];
+
+           if (value === '*') {
+             return {
+               key: key
+             };
+           } else {
+             return {
+               key: key,
+               value: value
+             };
            }
          };
 
-         behavior.off = function () {
-           _done = true;
+         _this.unsetTags = function (tags, geometry, ignoringKeys, skipFieldDefaults) {
+           // allow manually keeping some tags
+           var removeTags = ignoringKeys ? utilObjectOmit(_this.removeTags, ignoringKeys) : _this.removeTags;
+           tags = utilObjectOmit(tags, Object.keys(removeTags));
 
-           if (_timer) {
-             _timer.stop();
+           if (geometry && !skipFieldDefaults) {
+             _this.fields().forEach(function (field) {
+               if (field.matchGeometry(geometry) && field.key && field["default"] === tags[field.key]) {
+                 delete tags[field.key];
+               }
+             });
            }
 
-           _selected.interrupt().call(reset);
+           delete tags.area;
+           return tags;
          };
 
-         return behavior;
-       }
+         _this.setTags = function (tags, geometry, skipFieldDefaults) {
+           var addTags = _this.addTags;
+           tags = Object.assign({}, tags); // shallow copy
 
-       /* Creates a keybinding behavior for an operation */
-       function behaviorOperation(context) {
-         var _operation;
+           for (var k in addTags) {
+             if (addTags[k] === '*') {
+               // if this tag is ancillary, don't override an existing value since any value is okay
+               if (_this.tags[k] || !tags[k] || tags[k] === 'no') {
+                 tags[k] = 'yes';
+               }
+             } else {
+               tags[k] = addTags[k];
+             }
+           } // Add area=yes if necessary.
+           // This is necessary if the geometry is already an area (e.g. user drew an area) AND any of:
+           // 1. chosen preset could be either an area or a line (`barrier=city_wall`)
+           // 2. chosen preset doesn't have a key in osmAreaKeys (`railway=station`)
 
-         function keypress(d3_event) {
-           // prevent operations during low zoom selection
-           if (!context.map().withinEditableZoom()) return;
-           if (_operation.availableForKeypress && !_operation.availableForKeypress()) return;
-           d3_event.preventDefault();
 
-           var disabled = _operation.disabled();
+           if (!addTags.hasOwnProperty('area')) {
+             delete tags.area;
 
-           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);
+             if (geometry === 'area') {
+               var needsAreaTag = true;
 
-             _operation();
+               if (_this.geometry.indexOf('line') === -1) {
+                 for (var _k2 in addTags) {
+                   if (_k2 in osmAreaKeys) {
+                     needsAreaTag = false;
+                     break;
+                   }
+                 }
+               }
+
+               if (needsAreaTag) {
+                 tags.area = 'yes';
+               }
+             }
            }
-         }
 
-         function behavior() {
-           if (_operation && _operation.available()) {
-             context.keybinding().on(_operation.keys, keypress);
+           if (geometry && !skipFieldDefaults) {
+             _this.fields().forEach(function (field) {
+               if (field.matchGeometry(geometry) && field.key && !tags[field.key] && field["default"]) {
+                 tags[field.key] = field["default"];
+               }
+             });
            }
 
-           return behavior;
-         }
+           return tags;
+         }; // For a preset without fields, use the fields of the parent preset.
+         // Replace {preset} placeholders with the fields of the specified presets.
 
-         behavior.off = function () {
-           context.keybinding().off(_operation.keys);
-         };
 
-         behavior.which = function (_) {
-           if (!arguments.length) return _operation;
-           _operation = _;
-           return behavior;
-         };
+         function resolve(which) {
+           var fieldIDs = which === 'fields' ? _this.originalFields : _this.originalMoreFields;
+           var resolved = [];
+           fieldIDs.forEach(function (fieldID) {
+             var match = fieldID.match(/\{(.*)\}/);
 
-         return behavior;
-       }
+             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
 
-       function operationCircularize(context, selectedIDs) {
-         var _extent;
+           if (!resolved.length) {
+             var endIndex = _this.id.lastIndexOf('/');
 
-         var _actions = selectedIDs.map(getAction).filter(Boolean);
+             var parentID = endIndex && _this.id.substring(0, endIndex);
 
-         var _amount = _actions.length === 1 ? 'single' : 'multiple';
+             if (parentID) {
+               resolved = inheritFields(parentID, which);
+             }
+           }
 
-         var _coords = utilGetAllNodes(selectedIDs, context.graph()).map(function (n) {
-           return n.loc;
-         });
+           return utilArrayUniq(resolved); // returns an array of fields to inherit from the given presetID, if found
 
-         function getAction(entityID) {
-           var entity = context.entity(entityID);
-           if (entity.type !== 'way' || new Set(entity.nodes).size <= 1) return null;
+           function inheritFields(presetID, which) {
+             var parent = allPresets[presetID];
+             if (!parent) return [];
 
-           if (!_extent) {
-             _extent = entity.extent(context.graph());
-           } else {
-             _extent = _extent.extend(entity.extent(context.graph()));
-           }
+             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=*`
 
-           return actionCircularize(entityID, context.projection);
+
+           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;
+           }
          }
 
-         var operation = function operation() {
-           if (!_actions.length) return;
+         return _this;
+       }
 
-           var combinedAction = function combinedAction(graph, t) {
-             _actions.forEach(function (action) {
-               if (!action.disabled(graph)) {
-                 graph = action(graph, t);
-               }
-             });
+       var _mainPresetIndex = presetIndex(); // singleton
+       // `presetIndex` wraps a `presetCollection`
+       // with methods for loading new data and returning defaults
+       //
 
-             return graph;
-           };
+       function presetIndex() {
+         var dispatch = dispatch$8('favoritePreset', 'recentsChange');
+         var MAXRECENTS = 30; // seed the preset lists with geometry fallbacks
 
-           combinedAction.transitionable = true;
-           context.perform(combinedAction, operation.annotation());
-           window.setTimeout(function () {
-             context.validator().validate();
-           }, 300); // after any transition
+         var POINT = presetPreset('point', {
+           name: 'Point',
+           tags: {},
+           geometry: ['point', 'vertex'],
+           matchScore: 0.1
+         });
+         var LINE = presetPreset('line', {
+           name: 'Line',
+           tags: {},
+           geometry: ['line'],
+           matchScore: 0.1
+         });
+         var AREA = presetPreset('area', {
+           name: 'Area',
+           tags: {
+             area: 'yes'
+           },
+           geometry: ['area'],
+           matchScore: 0.1
+         });
+         var RELATION = presetPreset('relation', {
+           name: 'Relation',
+           tags: {},
+           geometry: ['relation'],
+           matchScore: 0.1
+         });
+
+         var _this = presetCollection([POINT, LINE, AREA, RELATION]);
+
+         var _presets = {
+           point: POINT,
+           line: LINE,
+           area: AREA,
+           relation: RELATION
+         };
+         var _defaults = {
+           point: presetCollection([POINT]),
+           vertex: presetCollection([POINT]),
+           line: presetCollection([LINE]),
+           area: presetCollection([AREA]),
+           relation: presetCollection([RELATION])
          };
+         var _fields = {};
+         var _categories = {};
+         var _universal = [];
+         var _addablePresetIDs = null; // Set of preset IDs that the user can add
 
-         operation.available = function () {
-           return _actions.length && selectedIDs.length === _actions.length;
-         }; // don't cache this because the visible extent could change
+         var _recents;
 
+         var _favorites; // Index of presets by (geometry, tag key).
 
-         operation.disabled = function () {
-           if (!_actions.length) return '';
 
-           var actionDisableds = _actions.map(function (action) {
-             return action.disabled(context.graph());
-           }).filter(Boolean);
+         var _geometryIndex = {
+           point: {},
+           vertex: {},
+           line: {},
+           area: {},
+           relation: {}
+         };
 
-           if (actionDisableds.length === _actions.length) {
-             // none of the features can be circularized
-             if (new Set(actionDisableds).size > 1) {
-               return 'multiple_blockers';
-             }
+         var _loadPromise;
 
-             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';
-           }
+         _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]
+             });
 
-           return false;
+             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: {}
+         //}
 
-           function someMissing() {
-             if (context.inIntro()) return false;
-             var osm = context.connection();
 
-             if (osm) {
-               var missing = _coords.filter(function (loc) {
-                 return !osm.isDataLoaded(loc);
-               });
+         _this.merge = function (d) {
+           var newLocationSets = []; // Merge Fields
 
-               if (missing.length) {
-                 missing.forEach(function (loc) {
-                   context.loadTileAtLoc(loc);
-                 });
-                 return true;
+           if (d.fields) {
+             Object.keys(d.fields).forEach(function (fieldID) {
+               var f = d.fields[fieldID];
+
+               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
 
-             return false;
-           }
-         };
 
-         operation.tooltip = function () {
-           var disable = operation.disabled();
-           return disable ? _t('operations.circularize.' + disable + '.' + _amount) : _t('operations.circularize.description.' + _amount);
-         };
+           if (d.presets) {
+             Object.keys(d.presets).forEach(function (presetID) {
+               var p = d.presets[presetID];
 
-         operation.annotation = function () {
-           return _t('operations.circularize.annotation.feature', {
-             n: _actions.length
-           });
-         };
+               if (p) {
+                 // add or replace
+                 var isAddable = !_addablePresetIDs || _addablePresetIDs.has(presetID);
 
-         operation.id = 'circularize';
-         operation.keys = [_t('operations.circularize.key')];
-         operation.title = _t('operations.circularize.title');
-         operation.behavior = behaviorOperation(context).which(operation);
-         return operation;
-       }
+                 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];
 
-       // For example, ⌘Z -> Ctrl+Z
+                 if (existing && !existing.isFallback()) {
+                   delete _presets[presetID];
+                 }
+               }
+             });
+           } // Merge Categories
 
-       var uiCmd = function uiCmd(code) {
-         var detected = utilDetect();
 
-         if (detected.os === 'mac') {
-           return code;
-         }
+           if (d.categories) {
+             Object.keys(d.categories).forEach(function (categoryID) {
+               var c = d.categories[categoryID];
+
+               if (c) {
+                 // add or replace
+                 c = presetCategory(categoryID, c, _presets);
+                 if (c.locationSet) newLocationSets.push(c);
+                 _categories[categoryID] = c;
+               } else {
+                 // remove
+                 delete _categories[categoryID];
+               }
+             });
+           } // Rebuild _this.collection after changing presets and categories
 
-         if (detected.os === 'win') {
-           if (code === '⌘⇧Z') return 'Ctrl+Y';
-         }
 
-         var result = '',
-             replacements = {
-           '⌘': 'Ctrl',
-           '⇧': 'Shift',
-           '⌥': 'Alt',
-           '⌫': 'Backspace',
-           '⌦': 'Delete'
-         };
+           _this.collection = Object.values(_presets).concat(Object.values(_categories)); // Merge Defaults
 
-         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];
-           }
-         }
+           if (d.defaults) {
+             Object.keys(d.defaults).forEach(function (geometry) {
+               var def = d.defaults[geometry];
 
-         return result;
-       }; // return a display-focused string for a given keyboard code
+               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
 
-       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());
+           _universal = Object.values(_fields).filter(function (field) {
+             return field.universal;
+           }); // Reset all the preset fields - they'll need to be resolved again
 
-         var operation = function operation() {
-           var nextSelectedID;
-           var nextSelectedLoc;
+           Object.values(_presets).forEach(function (preset) {
+             return preset.resetFields();
+           }); // Rebuild geometry index
 
-           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.
+           _geometryIndex = {
+             point: {},
+             vertex: {},
+             line: {},
+             area: {},
+             relation: {}
+           };
 
-             if (geometry === 'vertex') {
-               var nodes = parent.nodes;
-               var i = nodes.indexOf(id);
+           _this.collection.forEach(function (preset) {
+             (preset.geometry || []).forEach(function (geometry) {
+               var g = _geometryIndex[geometry];
 
-               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;
+               for (var key in preset.tags) {
+                 (g[key] = g[key] || []).push(preset);
                }
+             });
+           }); // Merge Custom Features
 
-               nextSelectedID = nodes[i];
-               nextSelectedLoc = context.entity(nextSelectedID).loc;
-             }
-           }
 
-           context.perform(action, operation.annotation());
-           context.validator().validate();
+           if (d.featureCollection && Array.isArray(d.featureCollection.features)) {
+             _mainLocations.mergeCustomGeoJSON(d.featureCollection);
+           } // Resolve all locationSet features.
 
-           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));
+
+           if (newLocationSets.length) {
+             _mainLocations.mergeLocationSets(newLocationSets);
            }
-         };
 
-         operation.available = function () {
-           return true;
+           return _this;
          };
 
-         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';
-           }
-
-           return false;
+         _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
 
-           function someMissing() {
-             if (context.inIntro()) return false;
-             var osm = context.connection();
+             if (geometry === 'vertex' && entity.isOnAddressLine(resolver)) {
+               geometry = 'point';
+             }
 
-             if (osm) {
-               var missing = coords.filter(function (loc) {
-                 return !osm.isDataLoaded(loc);
-               });
+             var entityExtent = entity.extent(resolver);
+             return _this.matchTags(entity.tags, geometry, entityExtent.center());
+           });
+         };
 
-               if (missing.length) {
-                 missing.forEach(function (loc) {
-                   context.loadTileAtLoc(loc);
-                 });
-                 return true;
-               }
-             }
+         _this.matchTags = function (tags, geometry, loc) {
+           var geometryMatches = _geometryIndex[geometry];
+           var address;
+           var best = -1;
+           var match;
+           var validLocations;
 
-             return false;
+           if (Array.isArray(loc)) {
+             validLocations = _mainLocations.locationsAt(loc);
            }
 
-           function hasWikidataTag(id) {
-             var entity = context.entity(id);
-             return entity.tags.wikidata && entity.tags.wikidata.trim().length > 0;
-           }
+           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];
+             }
 
-           function incompleteRelation(id) {
-             var entity = context.entity(id);
-             return entity.type === 'relation' && !entity.isComplete(context.graph());
-           }
+             var keyMatches = geometryMatches[k];
+             if (!keyMatches) continue;
 
-           function protectedMember(id) {
-             var entity = context.entity(id);
-             if (entity.type !== 'way') return false;
-             var parents = context.graph().parentRelations(entity);
+             for (var i = 0; i < keyMatches.length; i++) {
+               var candidate = keyMatches[i]; // discard candidate preset if location is not valid at `loc`
 
-             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 (validLocations && candidate.locationSetID) {
+                 if (!validLocations[candidate.locationSetID]) continue;
+               }
 
-               if (type === 'route' || type === 'boundary' || type === 'multipolygon' && role === 'outer') {
-                 return true;
+               var score = candidate.matchScore(tags);
+
+               if (score > best) {
+                 best = score;
+                 match = candidate;
                }
              }
-
-             return false;
            }
-         };
 
-         operation.tooltip = function () {
-           var disable = operation.disabled();
-           return disable ? _t('operations.delete.' + disable + '.' + multi) : _t('operations.delete.description.' + multi);
-         };
+           if (address && (!match || match.isFallback())) {
+             match = address;
+           }
 
-         operation.annotation = function () {
-           return selectedIDs.length === 1 ? _t('operations.delete.annotation.' + context.graph().geometry(selectedIDs[0])) : _t('operations.delete.annotation.feature', {
-             n: selectedIDs.length
-           });
+           return match || _this.fallback(geometry);
          };
 
-         operation.id = 'delete';
-         operation.keys = [uiCmd('⌘⌫'), uiCmd('⌘⌦'), uiCmd('⌦')];
-         operation.title = _t('operations.delete.title');
-         operation.behavior = behaviorOperation(context).which(operation);
-         return operation;
-       }
+         _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
 
-       function operationOrthogonalize(context, selectedIDs) {
-         var _extent;
+             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 _type;
 
-         var _actions = selectedIDs.map(chooseAction).filter(Boolean);
+         _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 _amount = _actions.length === 1 ? 'single' : 'multiple';
+           var presets = _this.collection.filter(function (p) {
+             return !p.suggestion && !p.replacement;
+           }); // keeplist
 
-         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());
+           presets.forEach(function (p) {
+             var keys = p.tags && Object.keys(p.tags);
+             var key = keys && keys.length && keys[0]; // pick the first tag
 
-           if (!_extent) {
-             _extent = entity.extent(context.graph());
-           } else {
-             _extent = _extent.extend(entity.extent(context.graph()));
-           } // square a line/area
+             if (!key) return;
+             if (ignore.indexOf(key) !== -1) return;
 
+             if (p.geometry.indexOf('area') !== -1) {
+               // probably an area..
+               areaKeys[key] = areaKeys[key] || {};
+             }
+           }); // discardlist
 
-           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);
+           presets.forEach(function (p) {
+             var key;
 
-             if (parents.length === 1) {
-               var way = parents[0];
+             for (key in p.addTags) {
+               // examine all addTags to get a better sense of what can be tagged on lines - #6800
+               var value = p.addTags[key];
 
-               if (way.nodes.indexOf(entityID) !== -1) {
-                 return actionOrthogonalize(way.id, context.projection, entityID);
+               if (key in areaKeys && // probably an area...
+               p.geometry.indexOf('line') !== -1 && // but sometimes a line
+               value !== '*') {
+                 areaKeys[key][value] = true;
                }
              }
-           }
+           });
+           return areaKeys;
+         };
 
-           return null;
-         }
+         _this.pointTags = function () {
+           return _this.collection.reduce(function (pointTags, d) {
+             // ignore name-suggestion-index, deprecated, and generic presets
+             if (d.suggestion || d.replacement || d.searchable === false) return pointTags; // only care about the primary tag
 
-         var operation = function operation() {
-           if (!_actions.length) return;
+             var keys = d.tags && Object.keys(d.tags);
+             var key = keys && keys.length && keys[0]; // pick the first tag
 
-           var combinedAction = function combinedAction(graph, t) {
-             _actions.forEach(function (action) {
-               if (!action.disabled(graph)) {
-                 graph = action(graph, t);
-               }
-             });
+             if (!key) return pointTags; // if this can be a point
 
-             return graph;
-           };
+             if (d.geometry.indexOf('point') !== -1) {
+               pointTags[key] = pointTags[key] || {};
+               pointTags[key][d.tags[key]] = true;
+             }
 
-           combinedAction.transitionable = true;
-           context.perform(combinedAction, operation.annotation());
-           window.setTimeout(function () {
-             context.validator().validate();
-           }, 300); // after any transition
+             return pointTags;
+           }, {});
          };
 
-         operation.available = function () {
-           return _actions.length && selectedIDs.length === _actions.length;
-         }; // don't cache this because the visible extent could change
-
+         _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
 
-         operation.disabled = function () {
-           if (!_actions.length) return '';
+             var keys = d.tags && Object.keys(d.tags);
+             var key = keys && keys.length && keys[0]; // pick the first tag
 
-           var actionDisableds = _actions.map(function (action) {
-             return action.disabled(context.graph());
-           }).filter(Boolean);
+             if (!key) return vertexTags; // if this can be a vertex
 
-           if (actionDisableds.length === _actions.length) {
-             // none of the features can be squared
-             if (new Set(actionDisableds).size > 1) {
-               return 'multiple_blockers';
+             if (d.geometry.indexOf('vertex') !== -1) {
+               vertexTags[key] = vertexTags[key] || {};
+               vertexTags[key][d.tags[key]] = true;
              }
 
-             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 vertexTags;
+           }, {});
+         };
+
+         _this.field = function (id) {
+           return _fields[id];
+         };
+
+         _this.universal = function () {
+           return _universal;
+         };
+
+         _this.defaults = function (geometry, n, startWithRecents, loc) {
+           var recents = [];
+
+           if (startWithRecents) {
+             recents = _this.recent().matchGeometry(geometry).collection.slice(0, 4);
            }
 
-           return false;
+           var defaults;
 
-           function someMissing() {
-             if (context.inIntro()) return false;
-             var osm = context.connection();
+           if (_addablePresetIDs) {
+             defaults = Array.from(_addablePresetIDs).map(function (id) {
+               var preset = _this.item(id);
 
-             if (osm) {
-               var missing = _coords.filter(function (loc) {
-                 return !osm.isDataLoaded(loc);
-               });
+               if (preset && preset.matchGeometry(geometry)) return preset;
+               return null;
+             }).filter(Boolean);
+           } else {
+             defaults = _defaults[geometry].collection.concat(_this.fallback(geometry));
+           }
 
-               if (missing.length) {
-                 missing.forEach(function (loc) {
-                   context.loadTileAtLoc(loc);
-                 });
-                 return true;
-               }
-             }
+           var result = presetCollection(utilArrayUniq(recents.concat(defaults)).slice(0, n - 1));
 
-             return false;
+           if (Array.isArray(loc)) {
+             var validLocations = _mainLocations.locationsAt(loc);
+             result.collection = result.collection.filter(function (a) {
+               return !a.locationSetID || validLocations[a.locationSetID];
+             });
            }
-         };
 
-         operation.tooltip = function () {
-           var disable = operation.disabled();
-           return disable ? _t('operations.orthogonalize.' + disable + '.' + _amount) : _t('operations.orthogonalize.description.' + _type + '.' + _amount);
-         };
+           return result;
+         }; // pass a Set of addable preset ids
 
-         operation.annotation = function () {
-           return _t('operations.orthogonalize.annotation.' + _type, {
-             n: _actions.length
-           });
-         };
 
-         operation.id = 'orthogonalize';
-         operation.keys = [_t('operations.orthogonalize.key')];
-         operation.title = _t('operations.orthogonalize.title');
-         operation.behavior = behaviorOperation(context).which(operation);
-         return operation;
-       }
+         _this.addablePresetIDs = function (val) {
+           if (!arguments.length) return _addablePresetIDs; // accept and convert arrays
 
-       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());
+           if (Array.isArray(val)) val = new Set(val);
+           _addablePresetIDs = val;
 
-         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
+           if (_addablePresetIDs) {
+             // reset all presets
+             _this.collection.forEach(function (p) {
+               // categories aren't addable
+               if (p.addable) p.addable(_addablePresetIDs.has(p.id));
+             });
+           } else {
+             _this.collection.forEach(function (p) {
+               if (p.addable) p.addable(true);
+             });
+           }
+
+           return _this;
          };
 
-         operation.available = function () {
-           return nodes.length >= 3;
-         }; // don't cache this because the visible extent could change
+         _this.recent = function () {
+           return presetCollection(utilArrayUniq(_this.getRecents().map(function (d) {
+             return d.preset;
+           })));
+         };
 
+         function RibbonItem(preset, source) {
+           var item = {};
+           item.preset = preset;
+           item.source = source;
 
-         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';
-           }
+           item.isFavorite = function () {
+             return item.source === 'favorite';
+           };
 
-           return false;
+           item.isRecent = function () {
+             return item.source === 'recent';
+           };
 
-           function someMissing() {
-             if (context.inIntro()) return false;
-             var osm = context.connection();
+           item.matches = function (preset) {
+             return item.preset.id === preset.id;
+           };
 
-             if (osm) {
-               var missing = coords.filter(function (loc) {
-                 return !osm.isDataLoaded(loc);
-               });
+           item.minified = function () {
+             return {
+               pID: item.preset.id
+             };
+           };
 
-               if (missing.length) {
-                 missing.forEach(function (loc) {
-                   context.loadTileAtLoc(loc);
-                 });
-                 return true;
-               }
-             }
+           return item;
+         }
 
-             return false;
-           }
+         function ribbonItemForMinified(d, source) {
+           if (d && d.pID) {
+             var preset = _this.item(d.pID);
 
-           function incompleteRelation(id) {
-             var entity = context.entity(id);
-             return entity.type === 'relation' && !entity.isComplete(context.graph());
+             if (!preset) return null;
+             return RibbonItem(preset, source);
            }
-         };
 
-         operation.tooltip = function () {
-           var disable = operation.disabled();
-           return disable ? _t('operations.reflect.' + disable + '.' + multi) : _t('operations.reflect.description.' + axis + '.' + multi);
-         };
+           return null;
+         }
 
-         operation.annotation = function () {
-           return _t('operations.reflect.annotation.' + axis + '.feature', {
-             n: selectedIDs.length
+         _this.getGenericRibbonItems = function () {
+           return ['point', 'line', 'area'].map(function (id) {
+             return RibbonItem(_this.item(id), 'generic');
            });
          };
 
-         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());
+         _this.getAddable = function () {
+           if (!_addablePresetIDs) return [];
+           return _addablePresetIDs.map(function (id) {
+             var preset = _this.item(id);
 
-         var operation = function operation() {
-           context.enter(modeMove(context, selectedIDs));
+             if (preset) return RibbonItem(preset, 'addable');
+             return null;
+           }).filter(Boolean);
          };
 
-         operation.available = function () {
-           return selectedIDs.length > 1 || context.entity(selectedIDs[0]).type !== 'node';
-         };
+         function setRecents(items) {
+           _recents = items;
+           var minifiedItems = items.map(function (d) {
+             return d.minified();
+           });
+           corePreferences('preset_recents', JSON.stringify(minifiedItems));
+           dispatch.call('recentsChange');
+         }
 
-         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.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 false;
+           return _recents;
+         };
 
-           function someMissing() {
-             if (context.inIntro()) return false;
-             var osm = context.connection();
+         _this.addRecent = function (preset, besidePreset, after) {
+           var recents = _this.getRecents();
 
-             if (osm) {
-               var missing = coords.filter(function (loc) {
-                 return !osm.isDataLoaded(loc);
-               });
+           var beforeItem = _this.recentMatching(besidePreset);
 
-               if (missing.length) {
-                 missing.forEach(function (loc) {
-                   context.loadTileAtLoc(loc);
-                 });
-                 return true;
-               }
-             }
+           var toIndex = recents.indexOf(beforeItem);
+           if (after) toIndex += 1;
+           var newItem = RibbonItem(preset, 'recent');
+           recents.splice(toIndex, 0, newItem);
+           setRecents(recents);
+         };
 
-             return false;
-           }
+         _this.removeRecent = function (preset) {
+           var item = _this.recentMatching(preset);
 
-           function incompleteRelation(id) {
-             var entity = context.entity(id);
-             return entity.type === 'relation' && !entity.isComplete(context.graph());
+           if (item) {
+             var items = _this.getRecents();
+
+             items.splice(items.indexOf(item), 1);
+             setRecents(items);
            }
          };
 
-         operation.tooltip = function () {
-           var disable = operation.disabled();
-           return disable ? _t('operations.move.' + disable + '.' + multi) : _t('operations.move.description.' + multi);
+         _this.recentMatching = function (preset) {
+           var items = _this.getRecents();
+
+           for (var i in items) {
+             if (items[i].matches(preset)) {
+               return items[i];
+             }
+           }
+
+           return null;
          };
 
-         operation.annotation = function () {
-           return selectedIDs.length === 1 ? _t('operations.move.annotation.' + context.graph().geometry(selectedIDs[0])) : _t('operations.move.annotation.feature', {
-             n: selectedIDs.length
-           });
+         _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;
          };
 
-         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;
-       }
+         _this.moveRecent = function (item, beforeItem) {
+           var recents = _this.getRecents();
 
-       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
-         });
+           var fromIndex = recents.indexOf(item);
+           var toIndex = recents.indexOf(beforeItem);
 
-         var _prevGraph;
+           var items = _this.moveItem(recents, fromIndex, toIndex);
 
-         var _prevAngle;
+           if (items) setRecents(items);
+         };
 
-         var _prevTransform;
+         _this.setMostRecent = function (preset) {
+           if (preset.searchable === false) return;
 
-         var _pivot;
+           var items = _this.getRecents();
 
-         function doRotate() {
-           var fn;
+           var item = _this.recentMatching(preset);
 
-           if (context.graph() !== _prevGraph) {
-             fn = context.perform;
+           if (item) {
+             items.splice(items.indexOf(item), 1);
            } else {
-             fn = context.replace;
-           } // projection changed, recalculate _pivot
+             item = RibbonItem(preset, 'recent');
+           } // remove the last recent (first in, first out)
 
 
-           var projection = context.projection;
-           var currTransform = projection.transform();
+           while (items.length >= MAXRECENTS) {
+             items.pop();
+           } // prepend array
 
-           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;
-           }
 
-           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();
-         }
+           items.unshift(item);
+           setRecents(items);
+         };
 
-         function getPivot(points) {
-           var _pivot;
+         function setFavorites(items) {
+           _favorites = items;
+           var minifiedItems = items.map(function (d) {
+             return d.minified();
+           });
+           corePreferences('preset_favorites', JSON.stringify(minifiedItems)); // call update
 
-           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);
+           dispatch.call('favoritePreset');
+         }
 
-             if (polygonHull.length === 2) {
-               _pivot = geoVecInterp(points[0], points[1], 0.5);
-             } else {
-               _pivot = d3_polygonCentroid(d3_polygonHull(points));
-             }
-           }
+         _this.addFavorite = function (preset, besidePreset, after) {
+           var favorites = _this.getFavorites();
 
-           return _pivot;
-         }
+           var beforeItem = _this.favoriteMatching(besidePreset);
 
-         function finish(d3_event) {
-           d3_event.stopPropagation();
-           context.replace(actionNoop(), annotation);
-           context.enter(modeSelect(context, entityIDs));
-         }
+           var toIndex = favorites.indexOf(beforeItem);
+           if (after) toIndex += 1;
+           var newItem = RibbonItem(preset, 'favorite');
+           favorites.splice(toIndex, 0, newItem);
+           setFavorites(favorites);
+         };
 
-         function cancel() {
-           context.pop();
-           context.enter(modeSelect(context, entityIDs));
-         }
+         _this.toggleFavorite = function (preset) {
+           var favs = _this.getFavorites();
 
-         function undone() {
-           context.enter(modeBrowse(context));
-         }
+           var favorite = _this.favoriteMatching(preset);
 
-         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);
-         };
+           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
 
-         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([]);
-         };
 
-         mode.selectedIDs = function () {
-           if (!arguments.length) return entityIDs; // no assign
+             favs.push(RibbonItem(preset, 'favorite'));
+           }
 
-           return mode;
+           setFavorites(favs);
          };
 
-         return mode;
-       }
+         _this.removeFavorite = function (preset) {
+           var item = _this.favoriteMatching(preset);
 
-       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 (item) {
+             var items = _this.getFavorites();
 
-         var operation = function operation() {
-           context.enter(modeRotate(context, selectedIDs));
+             items.splice(items.indexOf(item), 1);
+             setFavorites(items);
+           }
          };
 
-         operation.available = function () {
-           return nodes.length >= 2;
-         };
+         _this.getFavorites = function () {
+           if (!_favorites) {
+             // fetch from local storage
+             var rawFavorites = JSON.parse(corePreferences('preset_favorites'));
 
-         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 (!rawFavorites) {
+               rawFavorites = [];
+               corePreferences('preset_favorites', JSON.stringify(rawFavorites));
+             }
 
-           return false;
+             _favorites = rawFavorites.reduce(function (output, d) {
+               var item = ribbonItemForMinified(d, 'favorite');
+               if (item && item.preset.addable()) output.push(item);
+               return output;
+             }, []);
+           }
 
-           function someMissing() {
-             if (context.inIntro()) return false;
-             var osm = context.connection();
+           return _favorites;
+         };
 
-             if (osm) {
-               var missing = coords.filter(function (loc) {
-                 return !osm.isDataLoaded(loc);
-               });
+         _this.favoriteMatching = function (preset) {
+           var favs = _this.getFavorites();
 
-               if (missing.length) {
-                 missing.forEach(function (loc) {
-                   context.loadTileAtLoc(loc);
-                 });
-                 return true;
-               }
+           for (var index in favs) {
+             if (favs[index].matches(preset)) {
+               return favs[index];
              }
-
-             return false;
            }
 
-           function incompleteRelation(id) {
-             var entity = context.entity(id);
-             return entity.type === 'relation' && !entity.isComplete(context.graph());
-           }
+           return null;
          };
 
-         operation.tooltip = function () {
-           var disable = operation.disabled();
-           return disable ? _t('operations.rotate.' + disable + '.' + multi) : _t('operations.rotate.description.' + multi);
-         };
+         return utilRebind(_this, dispatch, 'on');
+       }
 
-         operation.annotation = function () {
-           return selectedIDs.length === 1 ? _t('operations.rotate.annotation.' + context.graph().geometry(selectedIDs[0])) : _t('operations.rotate.annotation.feature', {
-             n: selectedIDs.length
-           });
-         };
+       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;
 
-         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;
+         for (var i = 0; i < array.length; i++) {
+           val = array[i];
+           entity = typeof val === 'string' ? graph.hasEntity(val) : val;
+
+           if (entity) {
+             extent._extend(entity.extent(graph));
+           }
+         }
+
+         return extent;
        }
+       function utilTagDiff(oldTags, newTags) {
+         var tagDiff = [];
+         var keys = utilArrayUnion(Object.keys(oldTags), Object.keys(newTags)).sort();
+         keys.forEach(function (k) {
+           var oldVal = oldTags[k];
+           var newVal = newTags[k];
 
-       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
+           if ((oldVal || oldVal === '') && (newVal === undefined || newVal !== oldVal)) {
+             tagDiff.push({
+               type: '-',
+               key: k,
+               oldVal: oldVal,
+               newVal: newVal,
+               display: '- ' + k + '=' + oldVal
+             });
+           }
+
+           if ((newVal || newVal === '') && (oldVal === undefined || newVal !== oldVal)) {
+             tagDiff.push({
+               type: '+',
+               key: k,
+               oldVal: oldVal,
+               newVal: newVal,
+               display: '+ ' + k + '=' + newVal
+             });
+           }
          });
+         return tagDiff;
+       }
+       function utilEntitySelector(ids) {
+         return ids.length ? '.' + ids.join(',.') : 'nothing';
+       } // returns an selector to select entity ids for:
+       //  - entityIDs passed in
+       //  - shallow descendant entityIDs for any of those entities that are relations
 
-         var _prevGraph;
+       function utilEntityOrMemberSelector(ids, graph) {
+         var seen = new Set(ids);
+         ids.forEach(collectShallowDescendants);
+         return utilEntitySelector(Array.from(seen));
 
-         var _cache;
+         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
 
-         var _origin;
+       function utilEntityOrDeepMemberSelector(ids, graph) {
+         return utilEntitySelector(utilEntityAndDeepMemberIDs(ids, graph));
+       } // returns an selector to select entity ids for:
+       //  - entityIDs passed in
+       //  - deep descendant entityIDs for any of those entities that are relations
 
-         var _nudgeInterval;
+       function utilEntityAndDeepMemberIDs(ids, graph) {
+         var seen = new Set();
+         ids.forEach(collectDeepDescendants);
+         return Array.from(seen);
 
-         function doMove(nudge) {
-           nudge = nudge || [0, 0];
-           var fn;
+         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 (_prevGraph !== context.graph()) {
-             _cache = {};
-             _origin = context.map().mouseCoordinates();
-             fn = context.perform;
-           } else {
-             fn = context.overwrite;
+       function utilDeepMemberSelector(ids, graph, skipMultipolgonMembers) {
+         var idsSet = new Set(ids);
+         var seen = new Set();
+         var returners = new Set();
+         ids.forEach(collectDeepDescendants);
+         return utilEntitySelector(Array.from(returners));
+
+         function collectDeepDescendants(id) {
+           if (seen.has(id)) return;
+           seen.add(id);
+
+           if (!idsSet.has(id)) {
+             returners.add(id);
            }
 
-           var 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();
+           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 startNudge(nudge) {
-           if (_nudgeInterval) window.clearInterval(_nudgeInterval);
-           _nudgeInterval = window.setInterval(function () {
-             context.map().pan(nudge);
-             doMove(nudge);
-           }, 50);
-         }
+       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 stopNudge() {
-           if (_nudgeInterval) {
-             window.clearInterval(_nudgeInterval);
-             _nudgeInterval = null;
-           }
-         }
+       function utilGetAllNodes(ids, graph) {
+         var seen = new Set();
+         var nodes = new Set();
+         ids.forEach(collectNodes);
+         return Array.from(nodes);
 
-         function move() {
-           doMove();
-           var nudge = geoViewportEdge(context.map().mouse(), context.map().dimensions());
+         function collectNodes(id) {
+           if (seen.has(id)) return;
+           seen.add(id);
+           var entity = graph.hasEntity(id);
+           if (!entity) return;
 
-           if (nudge) {
-             startNudge(nudge);
+           if (entity.type === 'node') {
+             nodes.add(entity);
+           } else if (entity.type === 'way') {
+             entity.nodes.forEach(collectNodes);
            } else {
-             stopNudge();
+             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 = [];
 
-         function finish(d3_event) {
-           d3_event.stopPropagation();
-           context.replace(actionNoop(), annotation);
-           context.enter(modeSelect(context, entityIDs));
-           stopNudge();
+         if (tags.network) {
+           keyComponents.push('network');
          }
 
-         function cancel() {
-           if (baseGraph) {
-             while (context.graph() !== baseGraph) {
-               context.pop();
-             }
+         if (tags.ref) {
+           keyComponents.push('ref');
+         } // Routes may need more disambiguation based on direction or destination
 
-             context.enter(modeBrowse(context));
-           } else {
-             context.pop();
-             context.enter(modeSelect(context, entityIDs));
+
+         if (entity.tags.route) {
+           if (tags.direction) {
+             keyComponents.push('direction');
+           } else if (tags.from && tags.to) {
+             keyComponents.push('from');
+             keyComponents.push('to');
+
+             if (tags.via) {
+               keyComponents.push('via');
+             }
            }
+         }
 
-           stopNudge();
+         if (keyComponents.length) {
+           name = _t('inspector.display_name.' + keyComponents.join('_'), tags);
          }
 
-         function undone() {
-           context.enter(modeBrowse(context));
+         return name;
+       }
+       function utilDisplayNameForPath(entity) {
+         var name = utilDisplayName(entity);
+         var isFirefox = utilDetect().browser.toLowerCase().indexOf('firefox') > -1;
+
+         if (!isFirefox && name && rtlRegex.test(name)) {
+           name = fixRTLTextForSvg(name);
          }
 
-         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);
-         };
+         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"
+       //
 
-         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([]);
-         };
+       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());
 
-         mode.selectedIDs = function () {
-           if (!arguments.length) return entityIDs; // no assign
+         if (verbose) {
+           result = [presetName, displayName].filter(Boolean).join(' ');
+         } else {
+           result = displayName || presetName;
+         } // Fallback to the OSM type (node/way/relation)
 
-           return mode;
-         };
 
-         return mode;
+         return result || utilDisplayType(entity.id);
        }
+       function utilEntityRoot(entityType) {
+         return {
+           node: 'n',
+           way: 'w',
+           relation: 'r'
+         }[entityType];
+       } // Returns a single object containing the tags of all the given entities.
+       // Example:
+       // {
+       //   highway: 'service',
+       //   service: 'parking_aisle'
+       // }
+       //           +
+       // {
+       //   highway: 'service',
+       //   service: 'driveway',
+       //   width: '3'
+       // }
+       //           =
+       // {
+       //   highway: 'service',
+       //   service: [ 'driveway', 'parking_aisle' ],
+       //   width: [ '3', undefined ]
+       // }
 
-       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);
+       function utilCombinedTags(entityIDs, graph) {
+         var tags = {};
+         var tagCounts = {};
+         var allKeys = new Set();
+         var entities = entityIDs.map(function (entityID) {
+           return graph.hasEntity(entityID);
+         }).filter(Boolean); // gather the aggregate keys
+
+         entities.forEach(function (entity) {
+           var keys = Object.keys(entity.tags).filter(Boolean);
+           keys.forEach(function (key) {
+             allKeys.add(key);
            });
+         });
+         entities.forEach(function (entity) {
+           allKeys.forEach(function (key) {
+             var value = entity.tags[key]; // purposely allow `undefined`
 
-           for (var id in copies) {
-             var oldEntity = oldGraph.entity(id);
-             var newEntity = copies[id];
+             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);
+                 }
+               }
+             }
 
-             extent._extend(oldEntity.extent(oldGraph)); // Exclude child nodes from newIDs if their parent way was also copied.
+             var tagHash = key + '=' + value;
+             if (!tagCounts[tagHash]) tagCounts[tagHash] = 0;
+             tagCounts[tagHash] += 1;
+           });
+         });
 
+         for (var key in tags) {
+           if (!Array.isArray(tags[key])) continue; // sort values by frequency then alphabetically
 
-             var parents = context.graph().parentWays(newEntity);
-             var parentCopied = parents.some(function (parent) {
-               return originals.has(parent.id);
-             });
+           tags[key] = tags[key].sort(function (val1, val2) {
+             var key = key; // capture
 
-             if (!parentCopied) {
-               newIDs.push(newEntity.id);
-             }
-           } // Put pasted objects where mouse pointer is..
+             var count2 = tagCounts[key + '=' + val2];
+             var count1 = tagCounts[key + '=' + val1];
 
+             if (count2 !== count1) {
+               return count2 - count1;
+             }
 
-           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));
-         }
+             if (val2 && val1) {
+               return val1.localeCompare(val2);
+             }
 
-         function behavior() {
-           context.keybinding().on(uiCmd('⌘V'), doPaste);
-           return behavior;
+             return val1 ? 1 : -1;
+           });
          }
 
-         behavior.off = function () {
-           context.keybinding().off(uiCmd('⌘V'));
-         };
-
-         return behavior;
+         return tags;
        }
+       function utilStringQs(str) {
+         var i = 0; // advance past any leading '?' or '#' characters
 
-       // `String.prototype.repeat` method
-       // https://tc39.github.io/ecma262/#sec-string.prototype.repeat
-       _export({ target: 'String', proto: true }, {
-         repeat: stringRepeat
-       });
-
-       /*
-           `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.
-        */
-
-       function behaviorDrag() {
-         var dispatch$1 = dispatch('start', 'move', 'end'); // see also behaviorSelect
-
-         var _tolerancePx = 1; // keep this low to facilitate pixel-perfect micromapping
-
-         var _penTolerancePx = 4; // styluses can be touchy so require greater movement - #1981
-
-         var _origin = null;
-         var _selector = '';
-
-         var _targetNode;
-
-         var _targetEntity;
-
-         var _surface;
+         while (i < str.length && (str[i] === '?' || str[i] === '#')) {
+           i++;
+         }
 
-         var _pointerId; // use pointer events on supported platforms; fallback to mouse events
+         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]);
+           }
 
-         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+           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);
+         }
 
-         var d3_event_userSelectProperty = utilPrefixCSSProperty('UserSelect');
+         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);
 
-         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);
-           };
-         };
+         while (++i < n) {
+           if (prefixes[i] + property in s) {
+             return prefixes[i] + property;
+           }
+         }
 
-         function pointerdown(d3_event) {
-           if (_pointerId) return;
-           _pointerId = d3_event.pointerId || 'mouse';
-           _targetNode = this; // only force reflow once per drag
+         return false;
+       }
+       function utilPrefixCSSProperty(property) {
+         var prefixes = ['webkit', 'ms', 'Moz', 'O'];
+         var i = -1;
+         var n = prefixes.length;
+         var s = document.body.style;
 
-           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 (property.toLowerCase() in s) {
+           return property.toLowerCase();
+         }
 
-           if (_origin) {
-             offset = _origin.call(_targetNode, _targetEntity);
-             offset = [offset[0] - startOrigin[0], offset[1] - startOrigin[1]];
-           } else {
-             offset = [0, 0];
+         while (++i < n) {
+           if (prefixes[i] + property in s) {
+             return '-' + prefixes[i].toLowerCase() + property.replace(/([A-Z])/g, '-$1').toLowerCase();
            }
+         }
 
-           d3_event.stopPropagation();
+         return false;
+       }
+       var transformProperty;
+       function utilSetTransform(el, x, y, scale) {
+         var prop = transformProperty = transformProperty || utilPrefixCSSProperty('Transform');
+         var translate = utilDetect().opera ? 'translate(' + x + 'px,' + y + 'px)' : 'translate3d(' + x + 'px,' + y + 'px,0)';
+         return el.style(prop, translate + (scale ? ' scale(' + scale + ')' : ''));
+       } // Calculates Levenshtein distance between two strings
+       // see:  https://en.wikipedia.org/wiki/Levenshtein_distance
+       // first converts the strings to lowercase and replaces diacritic marks with ascii equivalents.
 
-           function pointermove(d3_event) {
-             if (_pointerId !== (d3_event.pointerId || 'mouse')) return;
-             var p = pointerLocGetter(d3_event);
+       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;
 
-             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
+         for (i = 0; i <= b.length; i++) {
+           matrix[i] = [i];
+         }
 
-               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.
+         for (j = 0; j <= a.length; j++) {
+           matrix[0][j] = j;
+         }
+
+         for (i = 1; i <= b.length; i++) {
+           for (j = 1; j <= a.length; j++) {
+             if (b.charAt(i - 1) === a.charAt(j - 1)) {
+               matrix[i][j] = matrix[i - 1][j - 1];
              } else {
-               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]);
+               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 pointerup(d3_event) {
-             if (_pointerId !== (d3_event.pointerId || 'mouse')) return;
-             _pointerId = null;
+         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
 
-             if (started) {
-               dispatch$1.call('end', this, d3_event, _targetEntity);
-               d3_event.preventDefault();
-             }
+       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]
 
-             select(window).on(_pointerPrefix + 'move.drag', null).on(_pointerPrefix + 'up.drag pointercancel.drag', null);
-             selectEnable();
-           }
+       function utilWrap(index, length) {
+         if (index < 0) {
+           index += Math.ceil(-index / length) * length;
          }
 
-         function behavior(selection) {
-           var matchesSelector = utilPrefixDOMProperty('matchesSelector');
-           var delegate = pointerdown;
+         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 (_selector) {
-             delegate = function delegate(d3_event) {
-               var root = this;
-               var target = d3_event.target;
+       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/
 
-               for (; target && target !== root; target = target.parentNode) {
-                 var datum = target.__data__;
-                 _targetEntity = datum instanceof osmNote ? datum : datum && datum.properties && datum.properties.entity;
+       function utilHashcode(str) {
+         var hash = 0;
 
-                 if (_targetEntity && target[matchesSelector](_selector)) {
-                   return pointerdown.call(target, d3_event);
-                 }
-               }
-             };
-           }
+         if (str.length === 0) {
+           return hash;
+         }
 
-           selection.on(_pointerPrefix + 'down.drag' + _selector, delegate);
+         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
          }
 
-         behavior.off = function (selection) {
-           selection.on(_pointerPrefix + 'down.drag' + _selector, null);
-         };
+         return hash;
+       } // Returns version of `str` with all runs of special characters replaced by `_`;
+       // suitable for HTML ids, classes, selectors, etc.
 
-         behavior.selector = function (_) {
-           if (!arguments.length) return _selector;
-           _selector = _;
-           return behavior;
-         };
+       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.
 
-         behavior.origin = function (_) {
-           if (!arguments.length) return _origin;
-           _origin = _;
-           return behavior;
-         };
+       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.
 
-         behavior.cancel = function () {
-           select(window).on(_pointerPrefix + 'move.drag', null).on(_pointerPrefix + 'up.drag pointercancel.drag', null);
-           return behavior;
-         };
+       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.
 
-         behavior.targetNode = function (_) {
-           if (!arguments.length) return _targetNode;
-           _targetNode = _;
-           return behavior;
-         };
+       function utilUnicodeCharsTruncated(str, limit) {
+         return Array.from(str).slice(0, limit).join('');
+       } // Variation of d3.json (https://github.com/d3/d3-fetch/blob/master/src/json.js)
+
+       function utilFetchJson(resourse, init) {
+         return fetch(resourse, init).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;
+           return response.json();
+         });
+       }
+
+       function osmEntity(attrs) {
+         // For prototypal inheritance.
+         if (this instanceof osmEntity) return; // Create the appropriate subtype.
 
-         behavior.targetEntity = function (_) {
-           if (!arguments.length) return _targetEntity;
-           _targetEntity = _;
-           return behavior;
-         };
+         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).
 
-         behavior.surface = function (_) {
-           if (!arguments.length) return _surface;
-           _surface = _;
-           return behavior;
-         };
 
-         return utilRebind(behavior, dispatch$1, 'on');
+         return new osmEntity().initialize(arguments);
        }
 
-       function modeDragNode(context) {
-         var mode = {
-           id: 'drag-node',
-           button: 'browse'
-         };
-         var hover = behaviorHover(context).altDisables(true).on('hover', context.ui().sidebar.hover);
-         var edit = behaviorEdit(context);
-
-         var _nudgeInterval;
+       osmEntity.id = function (type) {
+         return osmEntity.id.fromOSM(type, osmEntity.id.next[type]--);
+       };
 
-         var _restoreSelectedIDs = [];
-         var _wasMidpoint = false;
-         var _isCancelled = false;
+       osmEntity.id.next = {
+         changeset: -1,
+         node: -1,
+         way: -1,
+         relation: -1
+       };
 
-         var _activeEntity;
+       osmEntity.id.fromOSM = function (type, id) {
+         return type[0] + id;
+       };
 
-         var _startLoc;
+       osmEntity.id.toOSM = function (id) {
+         return id.slice(1);
+       };
 
-         var _lastLoc;
+       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().
 
-         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);
-         }
 
-         function stopNudge() {
-           if (_nudgeInterval) {
-             window.clearInterval(_nudgeInterval);
-             _nudgeInterval = null;
-           }
-         }
+       osmEntity.key = function (entity) {
+         return entity.id + 'v' + (entity.v || 0);
+       };
 
-         function moveAnnotation(entity) {
-           return _t('operations.move.annotation.' + entity.geometry(context.graph()));
-         }
+       var _deprecatedTagValuesByKey;
 
-         function connectAnnotation(nodeEntity, targetEntity) {
-           var nodeGeometry = nodeEntity.geometry(context.graph());
-           var targetGeometry = targetEntity.geometry(context.graph());
+       osmEntity.deprecatedTagValuesByKey = function (dataDeprecated) {
+         if (!_deprecatedTagValuesByKey) {
+           _deprecatedTagValuesByKey = {};
+           dataDeprecated.forEach(function (d) {
+             var oldKeys = Object.keys(d.old);
 
-           if (nodeGeometry === 'vertex' && targetGeometry === 'vertex') {
-             var nodeParentWayIDs = context.graph().parentWays(nodeEntity);
-             var targetParentWayIDs = context.graph().parentWays(targetEntity);
-             var sharedParentWays = utilArrayIntersection(nodeParentWayIDs, targetParentWayIDs); // if both vertices are part of the same way
+             if (oldKeys.length === 1) {
+               var oldKey = oldKeys[0];
+               var oldValue = d.old[oldKey];
 
-             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');
+               if (oldValue !== '*') {
+                 if (!_deprecatedTagValuesByKey[oldKey]) {
+                   _deprecatedTagValuesByKey[oldKey] = [oldValue];
+                 } else {
+                   _deprecatedTagValuesByKey[oldKey].push(oldValue);
+                 }
                }
-
-               return _t('operations.connect.annotation.from_vertex.to_sibling_vertex');
              }
-           }
-
-           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());
-         }
+         return _deprecatedTagValuesByKey;
+       };
 
-         function origin(entity) {
-           return context.projection(entity.loc);
-         }
+       osmEntity.prototype = {
+         tags: {},
+         initialize: function initialize(sources) {
+           for (var i = 0; i < sources.length; ++i) {
+             var source = sources[i];
 
-         function keydown(d3_event) {
-           if (d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
-             if (context.surface().classed('nope')) {
-               context.surface().classed('nope-suppressed', true);
+             for (var prop in source) {
+               if (Object.prototype.hasOwnProperty.call(source, prop)) {
+                 if (source[prop] === undefined) {
+                   delete this[prop];
+                 } else {
+                   this[prop] = source[prop];
+                 }
+               }
              }
-
-             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);
-             }
+           if (!this.id && this.type) {
+             this.id = osmEntity.id(this.type);
+           }
 
-             context.surface().classed('nope-suppressed', false).classed('nope-disabled', false);
+           if (!this.hasOwnProperty('visible')) {
+             this.visible = true;
            }
-         }
 
-         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 (debug) {
+             Object.freeze(this);
+             Object.freeze(this.tags);
+             if (this.loc) Object.freeze(this.loc);
+             if (this.nodes) Object.freeze(this.nodes);
+             if (this.members) Object.freeze(this.members);
+           }
 
-           if (_isCancelled) {
-             if (hasHidden) {
-               context.ui().flash.duration(4000).iconName('#iD-icon-no').label(_t('modes.drag_node.connected_to_hidden'))();
-             }
+           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
 
-             return drag.cancel();
-           }
+           var changed = false;
 
-           if (_wasMidpoint) {
-             var midpoint = entity;
-             entity = osmNode();
-             context.perform(actionAddMidpoint(midpoint, entity));
-             entity = context.entity(entity.id); // get post-action entity
+           for (var k in tags) {
+             var t1 = merged[k];
+             var t2 = tags[k];
 
-             var vertex = context.surface().selectAll('.' + entity.id);
-             drag.targetNode(vertex.node()).targetEntity(entity);
-           } else {
-             context.perform(actionNoop());
+             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()
+               );
+             }
            }
 
-           _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()`
+           return changed ? this.update({
+             tags: merged
+           }) : this;
+         },
+         intersects: function intersects(extent, resolver) {
+           return this.extent(resolver).intersects(extent);
+         },
+         hasNonGeometryTags: function hasNonGeometryTags() {
+           return Object.keys(this.tags).some(function (k) {
+             return k !== 'area';
+           });
+         },
+         hasParentRelations: function hasParentRelations(resolver) {
+           return resolver.parentRelations(this).length > 0;
+         },
+         hasInterestingTags: function hasInterestingTags() {
+           return Object.keys(this.tags).some(osmIsInterestingTag);
+         },
+         isHighwayIntersection: function isHighwayIntersection() {
+           return false;
+         },
+         isDegenerate: function isDegenerate() {
+           return true;
+         },
+         deprecatedTags: function deprecatedTags(dataDeprecated) {
+           var tags = this.tags; // if there are no tags, none can be deprecated
 
+           if (Object.keys(tags).length === 0) return [];
+           var deprecated = [];
+           dataDeprecated.forEach(function (d) {
+             var oldKeys = Object.keys(d.old);
 
-         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 : {};
-           }
-         }
+             if (d.replace) {
+               var hasExistingValues = Object.keys(d.replace).some(function (replaceKey) {
+                 if (!tags[replaceKey] || d.old[replaceKey]) return false;
+                 var replaceValue = d.replace[replaceKey];
+                 if (replaceValue === '*') return false;
+                 if (replaceValue === tags[replaceKey]) return false;
+                 return true;
+               }); // don't flag deprecated tags if the upgrade path would overwrite existing data - #7843
 
-         function 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 (hasExistingValues) return;
+             }
 
-           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;
+             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 (targetLoc) {
-               // snap to node/vertex - a point target with `.loc`
-               if (shouldSnapToNode(target)) {
-                 loc = targetLoc;
+               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;
+                   }
+                 }
                }
-             } 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;
-               }
-             }
-           }
+               return false;
+             });
 
-           context.replace(actionMoveNode(entity.id, loc)); // Below here: validations
+             if (matchesDeprecatedTags) {
+               deprecated.push(d);
+             }
+           });
+           return deprecated;
+         }
+       };
 
-           var isInvalid = false; // Check if this connection to `target` could cause relations to break..
+       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
 
-           if (target) {
-             isInvalid = hasRelationConflict(entity, target, edge, context.graph());
-           } // Check if this drag causes the geometry to break..
+         var turnLanes = {};
+         turnLanes.unspecified = parseTurnLanes(tags['turn:lanes']);
+         turnLanes.forward = parseTurnLanes(tags['turn:lanes:forward']);
+         turnLanes.backward = parseTurnLanes(tags['turn:lanes:backward']);
+         var maxspeedLanes = {};
+         maxspeedLanes.unspecified = parseMaxspeedLanes(tags['maxspeed:lanes'], maxspeed);
+         maxspeedLanes.forward = parseMaxspeedLanes(tags['maxspeed:lanes:forward'], maxspeed);
+         maxspeedLanes.backward = parseMaxspeedLanes(tags['maxspeed:lanes:backward'], maxspeed);
+         var psvLanes = {};
+         psvLanes.unspecified = parseMiscLanes(tags['psv:lanes']);
+         psvLanes.forward = parseMiscLanes(tags['psv:lanes:forward']);
+         psvLanes.backward = parseMiscLanes(tags['psv:lanes:backward']);
+         var busLanes = {};
+         busLanes.unspecified = parseMiscLanes(tags['bus:lanes']);
+         busLanes.forward = parseMiscLanes(tags['bus:lanes:forward']);
+         busLanes.backward = parseMiscLanes(tags['bus:lanes:backward']);
+         var taxiLanes = {};
+         taxiLanes.unspecified = parseMiscLanes(tags['taxi:lanes']);
+         taxiLanes.forward = parseMiscLanes(tags['taxi:lanes:forward']);
+         taxiLanes.backward = parseMiscLanes(tags['taxi:lanes:backward']);
+         var hovLanes = {};
+         hovLanes.unspecified = parseMiscLanes(tags['hov:lanes']);
+         hovLanes.forward = parseMiscLanes(tags['hov:lanes:forward']);
+         hovLanes.backward = parseMiscLanes(tags['hov:lanes:backward']);
+         var hgvLanes = {};
+         hgvLanes.unspecified = parseMiscLanes(tags['hgv:lanes']);
+         hgvLanes.forward = parseMiscLanes(tags['hgv:lanes:forward']);
+         hgvLanes.backward = parseMiscLanes(tags['hgv:lanes:backward']);
+         var bicyclewayLanes = {};
+         bicyclewayLanes.unspecified = parseBicycleWay(tags['bicycleway:lanes']);
+         bicyclewayLanes.forward = parseBicycleWay(tags['bicycleway:lanes:forward']);
+         bicyclewayLanes.backward = parseBicycleWay(tags['bicycleway:lanes:backward']);
+         var lanesObj = {
+           forward: [],
+           backward: [],
+           unspecified: []
+         }; // map forward/backward/unspecified of each lane type to lanesObj
 
+         mapToLanesObj(lanesObj, turnLanes, 'turnLane');
+         mapToLanesObj(lanesObj, maxspeedLanes, 'maxspeed');
+         mapToLanesObj(lanesObj, psvLanes, 'psv');
+         mapToLanesObj(lanesObj, busLanes, 'bus');
+         mapToLanesObj(lanesObj, taxiLanes, 'taxi');
+         mapToLanesObj(lanesObj, hovLanes, 'hov');
+         mapToLanesObj(lanesObj, hgvLanes, 'hgv');
+         mapToLanesObj(lanesObj, bicyclewayLanes, 'bicycleway');
+         return {
+           metadata: {
+             count: laneCount,
+             oneway: isOneWay,
+             forward: forward,
+             backward: backward,
+             bothways: bothways,
+             turnLanes: turnLanes,
+             maxspeed: maxspeed,
+             maxspeedLanes: maxspeedLanes,
+             psvLanes: psvLanes,
+             busLanes: busLanes,
+             taxiLanes: taxiLanes,
+             hovLanes: hovLanes,
+             hgvLanes: hgvLanes,
+             bicyclewayLanes: bicyclewayLanes
+           },
+           lanes: lanesObj
+         };
+       }
 
-           if (!isInvalid) {
-             isInvalid = hasInvalidGeometry(entity, context.graph());
-           }
+       function getLaneCount(tags, isOneWay) {
+         var count;
 
-           var nope = context.surface().classed('nope');
+         if (tags.lanes) {
+           count = parseInt(tags.lanes, 10);
 
-           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('')();
-             }
+           if (count > 0) {
+             return count;
            }
+         }
 
-           var nopeDisabled = context.surface().classed('nope-disabled');
+         switch (tags.highway) {
+           case 'trunk':
+           case 'motorway':
+             count = isOneWay ? 2 : 4;
+             break;
 
-           if (nopeDisabled) {
-             context.surface().classed('nope', false).classed('nope-suppressed', isInvalid);
-           } else {
-             context.surface().classed('nope', isInvalid).classed('nope-suppressed', false);
-           }
+           default:
+             count = isOneWay ? 1 : 2;
+             break;
+         }
 
-           _lastLoc = loc;
-         } // Uses `actionConnect.disabled()` to know whether this connection is ok..
+         return count;
+       }
 
+       function parseMaxspeed(tags) {
+         var maxspeed = tags.maxspeed;
+         if (!maxspeed) return;
+         var maxspeedRegex = /^([0-9][\.0-9]+?)(?:[ ]?(?:km\/h|kmh|kph|mph|knots))?$/;
+         if (!maxspeedRegex.test(maxspeed)) return;
+         return parseInt(maxspeed, 10);
+       }
 
-         function hasRelationConflict(entity, target, edge, graph) {
-           var testGraph = graph.update(); // copy
-           // if snapping to way - add midpoint there and consider that the target..
+       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 (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?
+         if (parseInt(tags.oneway, 10) === -1) {
+           forward = 0;
+           bothways = 0;
+           backward = laneCount;
+         } else if (isOneWay) {
+           forward = laneCount;
+           bothways = 0;
+           backward = 0;
+         } else if (isNaN(forward) && isNaN(backward)) {
+           backward = Math.floor((laneCount - bothways) / 2);
+           forward = laneCount - bothways - backward;
+         } else if (isNaN(forward)) {
+           if (backward > laneCount - bothways) {
+             backward = laneCount - bothways;
+           }
 
+           forward = laneCount - bothways - backward;
+         } else if (isNaN(backward)) {
+           if (forward > laneCount - bothways) {
+             forward = laneCount - bothways;
+           }
 
-           var ids = [entity.id, target.id];
-           return actionConnect(ids).disabled(testGraph);
+           backward = laneCount - bothways - forward;
          }
 
-         function hasInvalidGeometry(entity, graph) {
-           var parents = graph.parentWays(entity);
-           var i, j, k;
+         return {
+           forward: forward,
+           backward: backward,
+           bothways: bothways
+         };
+       }
 
-           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
+       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 relations = graph.parentRelations(parent);
+       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 (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
+       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;
+         });
+       }
 
-               for (k = 0; k < rings.length; k++) {
-                 nodes = rings[k].nodes;
+       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 (nodes.find(function (n) {
-                   return n.id === entity.id;
-                 })) {
-                   activeIndex = k;
+       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 (geoHasSelfIntersections(nodes, entity.id)) {
-                     return 'multipolygonMember';
-                   }
-                 }
+         if (data.backward) {
+           data.backward.forEach(function (l, i) {
+             if (!lanesObj.backward[i]) lanesObj.backward[i] = {};
+             lanesObj.backward[i][key] = l;
+           });
+         }
 
-                 rings[k].coords = nodes.map(function (n) {
-                   return n.loc;
-                 });
-               } // test active ring for intersections with other rings in the multipolygon
+         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();
 
-               for (k = 0; k < rings.length; k++) {
-                 if (k === activeIndex) continue; // make sure active ring doesn't cross passive rings
+             for (var i = 0; i < this.nodes.length; i++) {
+               var node = resolver.hasEntity(this.nodes[i]);
 
-                 if (geoHasLineIntersections(rings[activeIndex].nodes, rings[k].nodes, entity.id)) {
-                   return 'multipolygonRing';
-                 }
+               if (node) {
+                 extent._extend(node.extent());
                }
-             } // 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 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 (activeIndex === null) {
-               nodes = parent.nodes.map(function (nodeID) {
-                 return graph.entity(nodeID);
-               });
 
-               if (nodes.length && geoHasSelfIntersections(nodes, entity.id)) {
-                 return parent.geometry(graph);
-               }
+           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
              }
-           }
+           };
 
-           return false;
-         }
+           for (var key in averageWidths) {
+             if (this.tags[key] && averageWidths[key][this.tags[key]]) {
+               var width = averageWidths[key][this.tags[key]];
 
-         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 (key === 'highway') {
+                 var laneCount = this.tags.lanes && parseInt(this.tags.lanes, 10);
+                 if (!laneCount) laneCount = this.isOneWay() ? 1 : 2;
+                 return width * laneCount;
+               }
 
-           if (nudge) {
-             startNudge(d3_event, entity, nudge);
-           } else {
-             stopNudge();
+               return width;
+             }
            }
-         }
 
-         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
+           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 (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 (values[this.tags.oneway] !== undefined) {
+             return values[this.tags.oneway];
+           } // implied oneway tag..
 
-           if (wasPoint) {
-             context.enter(modeSelect(context, [entity.id]));
-           } else {
-             var reselection = _restoreSelectedIDs.filter(function (id) {
-               return context.graph().hasEntity(id);
-             });
 
-             if (reselection.length) {
-               context.enter(modeSelect(context, reselection));
-             } else {
-               context.enter(modeBrowse(context));
+           for (var key in this.tags) {
+             if (key in osmOneWayTags && this.tags[key] in osmOneWayTags[key]) {
+               return true;
              }
            }
-         }
-
-         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);
-           };
 
-           action.transitionable = true;
-           return action;
-         }
+           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];
 
-         function cancel() {
-           drag.cancel();
-           context.enter(modeBrowse(context));
-         }
+             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 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 null;
+         },
+         isSided: function isSided() {
+           if (this.tags.two_sided === 'yes') {
+             return false;
+           }
 
-         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);
-         };
+           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;
 
-         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();
-         };
+           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;
 
-         mode.selectedIDs = function () {
-           if (!arguments.length) return _activeEntity ? [_activeEntity.id] : []; // no assign
+             if (curr === 0) {
+               continue;
+             } else if (prev && curr !== prev) {
+               return false;
+             }
 
-           return mode;
-         };
+             prev = curr;
+           }
 
-         mode.activeID = function () {
-           if (!arguments.length) return _activeEntity && _activeEntity.id; // no assign
+           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 mode;
-         };
+           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])]]);
+           }
 
-         mode.restoreSelectedIDs = function (_) {
-           if (!arguments.length) return _restoreSelectedIDs;
-           _restoreSelectedIDs = _;
-           return mode;
-         };
+           return graph["transient"](this, 'segments', function () {
+             var segments = [];
 
-         mode.behavior = drag;
-         return mode;
-       }
+             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
+               });
+             }
 
-       // 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 */ });
-       });
+             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..
 
-       // `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
-           );
-         }
-       });
+           while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
+             nodes.splice(i, 1);
+             i = nodes.length - 1;
+           }
 
-       // patch native Promise.prototype for native async functions
-       if ( typeof nativePromiseConstructor == 'function' && !nativePromiseConstructor.prototype['finally']) {
-         redefine(nativePromiseConstructor.prototype, 'finally', getBuiltIn('Promise').prototype['finally']);
-       }
+           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;
 
-       // @@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;
+           if (index === undefined) {
+             index = max;
+           }
 
-             var rx = anObject(regexp);
-             var S = String(this);
+           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..
 
-             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;
-           }
-         ];
-       });
 
-       function quickselect$1(arr, k, left, right, compare) {
-         quickselectStep(arr, k, left || 0, right || arr.length - 1, compare || defaultCompare);
-       }
+           if (isClosed) {
+             var connector = this.first(); // leading connectors..
 
-       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 i = 1;
 
-           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);
+             while (i < nodes.length && nodes.length > 2 && nodes[i] === connector) {
+               nodes.splice(i, 1);
+               if (index > i) index--;
+             } // trailing connectors..
 
-           while (i < j) {
-             swap$1(arr, i, j);
-             i++;
-             j--;
 
-             while (compare(arr[i], t) < 0) {
-               i++;
-             }
+             i = nodes.length - 1;
 
-             while (compare(arr[j], t) > 0) {
-               j--;
+             while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
+               nodes.splice(i, 1);
+               if (index > i) index--;
+               i = nodes.length - 1;
              }
            }
 
-           if (compare(arr[left], t) === 0) swap$1(arr, left, j);else {
-             j++;
-             swap$1(arr, j, right);
+           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 (j <= k) left = j + 1;
-           if (k <= j) right = j - 1;
-         }
-       }
 
-       function swap$1(arr, i, j) {
-         var tmp = arr[i];
-         arr[i] = arr[j];
-         arr[j] = tmp;
-       }
+           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;
 
-       function defaultCompare(a, b) {
-         return a < b ? -1 : a > b ? 1 : 0;
-       }
+           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..
 
-       var RBush = /*#__PURE__*/function () {
-         function RBush() {
-           var maxEntries = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 9;
 
-           _classCallCheck(this, RBush);
+           if (isClosed) {
+             var connector = this.first(); // leading connectors..
 
-           // 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();
-         }
+             var i = 1;
 
-         _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 = [];
+             while (i < nodes.length && nodes.length > 2 && nodes[i] === connector) {
+               nodes.splice(i, 1);
+               if (index > i) index--;
+             } // trailing connectors..
 
-             while (node) {
-               for (var i = 0; i < node.children.length; i++) {
-                 var child = node.children[i];
-                 var childBBox = node.leaf ? toBBox(child) : child;
 
-                 if (intersects(bbox, childBBox)) {
-                   if (node.leaf) result.push(child);else if (contains(bbox, childBBox)) this._all(child, result);else nodesToSearch.push(child);
-                 }
-               }
+             i = nodes.length - 1;
 
-               node = nodesToSearch.pop();
-             }
+             while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
+               nodes.splice(i, 1);
+               if (index === i) index = 0; // update leading connector instead
 
-             return result;
+               i = nodes.length - 1;
+             }
            }
-         }, {
-           key: "collides",
-           value: function collides(bbox) {
-             var node = this.data;
-             if (!intersects(bbox, node)) return false;
-             var nodesToSearch = [];
 
-             while (node) {
-               for (var i = 0; i < node.children.length; i++) {
-                 var child = node.children[i];
-                 var childBBox = node.leaf ? this.toBBox(child) : child;
+           nodes.splice(index, 1, id);
+           nodes = nodes.filter(noRepeatNodes); // If the way was closed before, append a connector node to keep it closed..
 
-                 if (intersects(bbox, childBBox)) {
-                   if (node.leaf || contains(bbox, childBBox)) return true;
-                   nodesToSearch.push(child);
-                 }
-               }
+           if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
+             nodes.push(nodes[0]);
+           }
 
-               node = nodesToSearch.pop();
+           return this.update({
+             nodes: nodes
+           });
+         },
+         // Replaces each occurrence of node id needle with replacement.
+         // Consecutive duplicates are eliminated including existing ones.
+         // Circularity is preserved.
+         replaceNode: function replaceNode(needleID, replacementID) {
+           var nodes = this.nodes.slice();
+           var isClosed = this.isClosed();
+
+           for (var i = 0; i < nodes.length; i++) {
+             if (nodes[i] === needleID) {
+               nodes[i] = replacementID;
              }
+           }
 
-             return false;
+           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]);
            }
-         }, {
-           key: "load",
-           value: function load(data) {
-             if (!(data && data.length)) return this;
 
-             if (data.length < this._minEntries) {
-               for (var i = 0; i < data.length; i++) {
-                 this.insert(data[i]);
-               }
+           return this.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..
 
-               return this;
-             } // recursively build the tree with the given data from scratch using OMT algorithm
+           if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
+             nodes.push(nodes[0]);
+           }
 
+           return this.update({
+             nodes: nodes
+           });
+         },
+         asJXON: function asJXON(changeset_id) {
+           var r = {
+             way: {
+               '@id': this.osmId(),
+               '@version': this.version || 0,
+               nd: this.nodes.map(function (id) {
+                 return {
+                   keyAttributes: {
+                     ref: osmEntity.id.toOSM(id)
+                   }
+                 };
+               }, this),
+               tag: Object.keys(this.tags).map(function (k) {
+                 return {
+                   keyAttributes: {
+                     k: k,
+                     v: this.tags[k]
+                   }
+                 };
+               }, this)
+             }
+           };
 
-             var node = this._build(data.slice(), 0, data.length - 1, 0);
+           if (changeset_id) {
+             r.way['@changeset'] = changeset_id;
+           }
 
-             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 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()) {
+               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._insert(node, this.data.height - node.height - 1, true);
+             if (!this.isClosed() && nodes.length) {
+               json.coordinates[0].push(nodes[0].loc);
              }
 
-             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
+             var area = d3_geoArea(json); // Heuristic for detecting counterclockwise winding order. Assumes
+             // that OpenStreetMap polygons are not hemisphere-spanning.
 
-             while (node || path.length) {
-               if (!node) {
-                 // go up
-                 node = path.pop();
-                 parent = path[path.length - 1];
-                 i = indexes.pop();
-                 goingUp = true;
-               }
+             if (area > 2 * Math.PI) {
+               json.coordinates[0] = json.coordinates[0].reverse();
+               area = d3_geoArea(json);
+             }
 
-               if (node.leaf) {
-                 // check current node
-                 var index = findItem(item, node.children, equalsFn);
+             return isNaN(area) ? 0 : area;
+           });
+         }
+       }); // Filter function to eliminate consecutive duplicates.
 
-                 if (index !== -1) {
-                   // item found, remove the item and condense tree upwards
-                   node.children.splice(index, 1);
-                   path.push(node);
+       function noRepeatNodes(node, i, arr) {
+         return i === 0 || node !== arr[i - 1];
+       }
 
-                   this._condense(path);
+       //
+       // 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.
 
-                   return this;
-                 }
-               }
+       function osmOldMultipolygonOuterMemberOfRelation(entity, graph) {
+         if (entity.type !== 'relation' || !entity.isMultipolygon() || Object.keys(entity.tags).filter(osmIsInterestingTag).length > 1) {
+           return false;
+         }
 
-               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
+         var outerMember;
 
-             }
+         for (var memberIndex in entity.members) {
+           var member = entity.members[memberIndex];
 
-             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 = [];
+           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);
 
-             while (node) {
-               if (node.leaf) result.push.apply(result, _toConsumableArray(node.children));else nodesToSearch.push.apply(nodesToSearch, _toConsumableArray(node.children));
-               node = nodesToSearch.pop();
+             if (Object.keys(outerMember.tags).filter(osmIsInterestingTag).length === 0) {
+               return false;
              }
-
-             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;
-             }
+         }
 
-             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 outerMember;
+       } // For fixing up rendering of multipolygons with tags on the outer member.
+       // https://github.com/openstreetmap/iD/issues/613
 
-               M = Math.ceil(N / Math.pow(M, height - 1));
-             }
+       function osmIsOldMultipolygonOuterMember(entity, graph) {
+         if (entity.type !== 'way' || Object.keys(entity.tags).filter(osmIsInterestingTag).length === 0) {
+           return false;
+         }
 
-             node = createNode([]);
-             node.leaf = false;
-             node.height = height; // split the items into M mostly square tiles
+         var parents = graph.parentRelations(entity);
+         if (parents.length !== 1) return false;
+         var parent = parents[0];
 
-             var N2 = Math.ceil(N / M);
-             var N1 = N2 * Math.ceil(Math.sqrt(M));
-             multiSelect(items, left, right, N1, this.compareMinX);
+         if (!parent.isMultipolygon() || Object.keys(parent.tags).filter(osmIsInterestingTag).length > 1) {
+           return false;
+         }
 
-             for (var i = left; i <= right; i += N1) {
-               var right2 = Math.min(i + N1 - 1, right);
-               multiSelect(items, i, right2, N2, this.compareMinY);
+         var members = parent.members,
+             member;
 
-               for (var j = i; j <= right2; j += N2) {
-                 var right3 = Math.min(j + N2 - 1, right2); // pack each entry recursively
+         for (var i = 0; i < members.length; i++) {
+           member = members[i];
 
-                 node.children.push(this._build(items, j, right3, height - 1));
-               }
-             }
+           if (member.id === entity.id && member.role && member.role !== 'outer') {
+             // Not outer member
+             return false;
+           }
 
-             calcBBox(node, this.toBBox);
-             return node;
+           if (member.id !== entity.id && (!member.role || member.role === 'outer')) {
+             // Not a simple multipolygon
+             return false;
            }
-         }, {
-           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;
+         }
 
-               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
+         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 (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 (!parent.isMultipolygon() || Object.keys(parent.tags).filter(osmIsInterestingTag).length > 1) {
+           return false;
+         }
 
-               node = targetNode || node.children[0];
-             }
+         var members = parent.members,
+             member,
+             outerMember;
 
-             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
+         for (var i = 0; i < members.length; i++) {
+           member = members[i];
 
-             var node = this._chooseSubtree(bbox, this.data, level, insertPath); // put the item into the node
+           if (!member.role || member.role === 'outer') {
+             if (outerMember) return false; // Not a simple multipolygon
 
+             outerMember = member;
+           }
+         }
 
-             node.children.push(item);
-             extend$1(node, bbox); // split on node overflow; propagate upwards if necessary
+         if (!outerMember) return false;
+         var outerEntity = graph.hasEntity(outerMember.id);
 
-             while (level >= 0) {
-               if (insertPath[level].children.length > this._maxEntries) {
-                 this._split(insertPath, level);
+         if (!outerEntity || !Object.keys(outerEntity.tags).filter(osmIsInterestingTag).length) {
+           return false;
+         }
 
-                 level--;
-               } else break;
-             } // adjust bboxes along the insertion path
+         return outerEntity;
+       } // Join `toJoin` array into sequences of connecting ways.
+       // Segments which share identical start/end nodes will, as much as possible,
+       // be connected with each other.
+       //
+       // The return value is a nested array. Each constituent array contains elements
+       // of `toJoin` which have been determined to connect.
+       //
+       // Each consitituent array also has a `nodes` property whose value is an
+       // ordered array of member nodes, with appropriate order reversal and
+       // start/end coordinate de-duplication.
+       //
+       // Members of `toJoin` must have, at minimum, `type` and `id` properties.
+       // Thus either an array of `osmWay`s or a relation member array may be used.
+       //
+       // If an member is an `osmWay`, its tags and childnodes may be reversed via
+       // `actionReverse` in the output.
+       //
+       // The returned sequences array also has an `actions` array property, containing
+       // any reversal actions that should be applied to the graph, should the calling
+       // code attempt to actually join the given ways.
+       //
+       // Incomplete members (those for which `graph.hasEntity(element.id)` returns
+       // false) and non-way members are ignored.
+       //
 
+       function osmJoinWays(toJoin, graph) {
+         function resolve(member) {
+           return graph.childNodes(graph.entity(member.id));
+         }
 
-             this._adjustParentBBoxes(bbox, insertPath, level);
-           } // split overflowed node into two
+         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
 
-         }, {
-           key: "_split",
-           value: function _split(insertPath, level) {
-             var node = insertPath[level];
-             var M = node.children.length;
-             var m = this._minEntries;
 
-             this._chooseSplitAxis(node, m, M);
+         toJoin = toJoin.filter(function (member) {
+           return member.type === 'way' && graph.hasEntity(member.id);
+         }); // Are the things we are joining relation members or `osmWays`?
+         // If `osmWays`, skip the "prefer a forward path" code below (see #4872)
 
-             var splitIndex = this._chooseSplitIndex(node, m, M);
+         var i;
+         var joinAsMembers = true;
 
-             var newNode = createNode(node.children.splice(splitIndex, node.children.length - splitIndex));
-             newNode.height = node.height;
-             newNode.leaf = node.leaf;
-             calcBBox(node, this.toBBox);
-             calcBBox(newNode, this.toBBox);
-             if (level) insertPath[level - 1].children.push(newNode);else this._splitRoot(node, newNode);
-           }
-         }, {
-           key: "_splitRoot",
-           value: function _splitRoot(node, newNode) {
-             // split root node
-             this.data = createNode([node, newNode]);
-             this.data.height = node.height + 1;
-             this.data.leaf = false;
-             calcBBox(this.data, this.toBBox);
+         for (i = 0; i < toJoin.length; i++) {
+           if (toJoin[i] instanceof osmWay) {
+             joinAsMembers = false;
+             break;
            }
-         }, {
-           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
+         var sequences = [];
+         sequences.actions = [];
 
-               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;
-                 }
-               }
-             }
+         while (toJoin.length) {
+           // start a new sequence
+           var item = toJoin.shift();
+           var currWays = [item];
+           var currNodes = resolve(item).slice(); // add to it
 
-             return index || M - m;
-           } // sorts node children by the best axis for split
+           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.
 
-         }, {
-           key: "_chooseSplitAxis",
-           value: function _chooseSplitAxis(node, m, M) {
-             var compareMinX = node.leaf ? this.compareMinX : compareNodeMinX;
-             var compareMinY = node.leaf ? this.compareMinY : compareNodeMinY;
+             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.
 
-             var xMargin = this._allDistMargin(node, m, M, compareMinX);
+               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];
+               }
 
-             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
+               if (nodes[0] === end) {
+                 fn = currNodes.push; // join to end
 
+                 nodes = nodes.slice(1);
+                 break;
+               } else if (nodes[nodes.length - 1] === end) {
+                 fn = currNodes.push; // join to end
 
-             if (xMargin < yMargin) node.children.sort(compareMinX);
-           } // total margin of all possible split distributions where each node is at least m full
+                 nodes = nodes.slice(0, -1).reverse();
+                 item = reverse(item);
+                 break;
+               } else if (nodes[nodes.length - 1] === start) {
+                 fn = currNodes.unshift; // join to beginning
 
-         }, {
-           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);
+                 nodes = nodes.slice(0, -1);
+                 break;
+               } else if (nodes[0] === start) {
+                 fn = currNodes.unshift; // join to beginning
 
-             for (var i = m; i < M - m; i++) {
-               var child = node.children[i];
-               extend$1(leftBBox, node.leaf ? toBBox(child) : child);
-               margin += bboxMargin(leftBBox);
+                 nodes = nodes.slice(1).reverse();
+                 item = reverse(item);
+                 break;
+               } else {
+                 fn = nodes = null;
+               }
              }
 
-             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);
+             if (!nodes) {
+               // couldn't find a joinable way/member
+               break;
              }
 
-             return margin;
-           }
-         }, {
-           key: "_adjustParentBBoxes",
-           value: function _adjustParentBBoxes(bbox, path, level) {
-             // adjust bboxes along the given tree path
-             for (var i = level; i >= 0; i--) {
-               extend$1(path[i], bbox);
-             }
-           }
-         }, {
-           key: "_condense",
-           value: function _condense(path) {
-             // go through the path, removing empty nodes and updating bboxes
-             for (var i = path.length - 1, siblings; i >= 0; i--) {
-               if (path[i].children.length === 0) {
-                 if (i > 0) {
-                   siblings = path[i - 1].children;
-                   siblings.splice(siblings.indexOf(path[i]), 1);
-                 } else this.clear();
-               } else calcBBox(path[i], this.toBBox);
-             }
+             fn.apply(currWays, [item]);
+             fn.apply(currNodes, nodes);
+             toJoin.splice(i, 1);
            }
-         }]);
-
-         return RBush;
-       }();
-
-       function findItem(item, items, equalsFn) {
-         if (!equalsFn) return items.indexOf(item);
-
-         for (var i = 0; i < items.length; i++) {
-           if (equalsFn(item, items[i])) return i;
-         }
-
-         return -1;
-       } // calculate node's bbox from bboxes of its children
-
-
-       function calcBBox(node, toBBox) {
-         distBBox(node, 0, node.children.length, toBBox, node);
-       } // min bounding rectangle of node children from k to p-1
-
-
-       function distBBox(node, k, p, toBBox, destNode) {
-         if (!destNode) destNode = createNode(null);
-         destNode.minX = Infinity;
-         destNode.minY = Infinity;
-         destNode.maxX = -Infinity;
-         destNode.maxY = -Infinity;
 
-         for (var i = k; i < p; i++) {
-           var child = node.children[i];
-           extend$1(destNode, node.leaf ? toBBox(child) : child);
+           currWays.nodes = currNodes;
+           sequences.push(currWays);
          }
 
-         return destNode;
+         return sequences;
        }
 
-       function extend$1(a, b) {
-         a.minX = Math.min(a.minX, b.minX);
-         a.minY = Math.min(a.minY, b.minY);
-         a.maxX = Math.max(a.maxX, b.maxX);
-         a.maxY = Math.max(a.maxY, b.maxY);
-         return a;
-       }
+       function 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 compareNodeMinX(a, b) {
-         return a.minX - b.minX;
-       }
+           var isPTv2 = /stop|platform/.test(member.role);
 
-       function compareNodeMinY(a, b) {
-         return a.minY - b.minY;
-       }
+           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;
+             }
 
-       function bboxArea(a) {
-         return (a.maxX - a.minX) * (a.maxY - a.minY);
-       }
+             graph = graph.replace(relation.addMember(member, memberIndex));
+           }
 
-       function bboxMargin(a) {
-         return a.maxX - a.minX + (a.maxY - a.minY);
-       }
+           return graph;
+         }; // Add a way member into the relation "wherever it makes sense".
+         // In this situation we were not supplied a memberIndex.
 
-       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 addWayMember(relation, graph) {
+           var groups, tempWay, item, i, j, k; // remove PTv2 stops and platforms before doing anything.
 
-       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 PTv2members = [];
+           var members = [];
 
-       function contains(a, b) {
-         return a.minX <= b.minX && a.minY <= b.minY && b.maxX <= a.maxX && b.maxY <= a.maxY;
-       }
+           for (i = 0; i < relation.members.length; i++) {
+             var m = relation.members[i];
 
-       function intersects(a, b) {
-         return b.minX <= a.maxX && b.minY <= a.maxY && b.maxX >= a.minX && b.maxY >= a.minY;
-       }
+             if (/stop|platform/.test(m.role)) {
+               PTv2members.push(m);
+             } else {
+               members.push(m);
+             }
+           }
 
-       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
+           relation = relation.update({
+             members: members
+           });
 
+           if (insertPair) {
+             // We're adding a member that must stay paired with an existing member.
+             // (This feature is used by `actionSplit`)
+             //
+             // This is tricky because the members may exist multiple times in the
+             // member list, and with different A-B/B-A ordering and different roles.
+             // (e.g. a bus route that loops out and back - #4589).
+             //
+             // Replace the existing member with a temporary way,
+             // so that `osmJoinWays` can treat the pair like a single way.
+             tempWay = osmWay({
+               id: 'wTemp',
+               nodes: insertPair.nodes
+             });
+             graph = graph.replace(tempWay);
+             var tempMember = {
+               id: tempWay.id,
+               type: 'way',
+               role: member.role
+             };
+             var tempRelation = relation.replaceMember({
+               id: insertPair.originalID
+             }, tempMember, true);
+             groups = utilArrayGroupBy(tempRelation.members, 'type');
+             groups.way = groups.way || [];
+           } else {
+             // Add the member anywhere, one time. Just push and let `osmJoinWays` decide where to put it.
+             groups = utilArrayGroupBy(relation.members, 'type');
+             groups.way = groups.way || [];
+             groups.way.push(member);
+           }
 
-       function multiSelect(arr, left, right, n, compare) {
-         var stack = [left, right];
+           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
 
-         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);
-         }
-       }
+           for (i = 0; i < joined.length; i++) {
+             var segment = joined[i];
+             var nodes = segment.nodes.slice();
+             var startIndex = segment[0].index; // j = array index in `members` where this segment starts
 
-       var 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
+             for (j = 0; j < members.length; j++) {
+               if (members[j].index === startIndex) {
+                 break;
+               }
+             } // k = each member in segment
 
-       var _cache;
 
-       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];
+             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
 
-       function abortRequest(controller) {
-         if (controller) {
-           controller.abort();
-         }
-       }
+               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
 
-       function abortUnwantedRequests(cache, tiles) {
-         Object.keys(cache.inflightTile).forEach(function (k) {
-           var wanted = tiles.find(function (tile) {
-             return k === tile.id;
-           });
 
-           if (!wanted) {
-             abortRequest(cache.inflightTile[k]);
-             delete cache.inflightTile[k];
+               if (k > 0) {
+                 if (j + k >= members.length || item.index !== members[j + k].index) {
+                   moveMember(members, item.index, j + k);
+                 }
+               }
+
+               nodes.splice(0, way.nodes.length - 1);
+             }
            }
-         });
-       }
 
-       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 (tempWay) {
+             graph = graph.remove(tempWay);
+           } // Final pass: skip dead items, split pairs, remove index properties
 
 
-       function updateRtree(item, replace) {
-         _cache.rtree.remove(item, function (a, b) {
-           return a.data.id === b.data.id;
-         });
+           var wayMembers = [];
 
-         if (replace) {
-           _cache.rtree.insert(item);
-         }
-       }
+           for (i = 0; i < members.length; i++) {
+             item = members[i];
+             if (item.index === -1) continue;
 
-       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 (item.pair) {
+               wayMembers.push(item.pair[0]);
+               wayMembers.push(item.pair[1]);
+             } else {
+               wayMembers.push(utilObjectOmit(item, ['index']));
+             }
+           } // Put stops and platforms first, then nodes, ways, relations
+           // This is recommended for Public Transport v2 routes:
+           // see https://wiki.openstreetmap.org/wiki/Public_transport#Service_routes
 
-         if (!issueTemplate) {
-           /* eslint-disable no-console */
-           console.log('No Template: ', d.whichType);
-           console.log('  ', d.description);
-           /* eslint-enable no-console */
 
-           return;
-         } // some descriptions are just fixed text
+           var newMembers = PTv2members.concat(groups.node || [], wayMembers, groups.relation || []);
+           return graph.replace(relation.update({
+             members: newMembers
+           })); // `moveMember()` changes the `members` array in place by splicing
+           // the item with `.index = findIndex` to where it belongs,
+           // and marking the old position as "dead" with `.index = -1`
+           //
+           // j=5, k=0                jk
+           // segment                 5 4 7 6
+           // members       0 1 2 3 4 5 6 7 8 9        keep 5 in j+k
+           //
+           // j=5, k=1                j k
+           // segment                 5 4 7 6
+           // members       0 1 2 3 4 5 6 7 8 9        move 4 to j+k
+           // members       0 1 2 3 x 5 4 6 7 8 9      moved
+           //
+           // j=5, k=2                j   k
+           // segment                 5 4 7 6
+           // members       0 1 2 3 x 5 4 6 7 8 9      move 7 to j+k
+           // members       0 1 2 3 x 5 4 7 6 x 8 9    moved
+           //
+           // j=5, k=3                j     k
+           // segment                 5 4 7 6
+           // members       0 1 2 3 x 5 4 7 6 x 8 9    keep 6 in j+k
+           //
 
+           function moveMember(arr, findIndex, toIndex) {
+             var i;
 
-         if (!issueTemplate.regex) return; // regex pattern should match description with variable details captured
+             for (i = 0; i < arr.length; i++) {
+               if (arr[i].index === findIndex) {
+                 break;
+               }
+             }
 
-         var errorRegex = new RegExp(issueTemplate.regex, 'i');
-         var errorMatch = errorRegex.exec(d.description);
+             var item = Object.assign({}, arr[i]); // shallow copy
 
-         if (!errorMatch) {
-           /* eslint-disable no-console */
-           console.log('Unmatched: ', d.whichType);
-           console.log('  ', d.description);
-           console.log('  ', errorRegex);
-           /* eslint-enable no-console */
+             arr[i].index = -1; // mark as dead
 
-           return;
-         }
+             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
 
-         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] : '';
 
-           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();
+           function withIndex(arr) {
+             var result = new Array(arr.length);
 
-             if (_krData.localizeStrings[compare]) {
-               // some replacement strings can be localized
-               capture = _t('QA.keepRight.error_parts.' + _krData.localizeStrings[compare]);
+             for (var i = 0; i < arr.length; i++) {
+               result[i] = Object.assign({}, arr[i]); // shallow copy
+
+               result[i].index = i;
              }
-           }
 
-           replacements['var' + i] = capture;
+             return result;
+           }
          }
+       }
 
-         return replacements;
+       function actionAddMidpoint(midpoint, node) {
+         return function (graph) {
+           graph = graph.replace(node.move(midpoint.loc));
+           var parents = utilArrayIntersection(graph.parentWays(graph.entity(midpoint.edge[0])), graph.parentWays(graph.entity(midpoint.edge[1])));
+           parents.forEach(function (way) {
+             for (var i = 0; i < way.nodes.length - 1; i++) {
+               if (geoEdgeEqual([way.nodes[i], way.nodes[i + 1]], midpoint.edge)) {
+                 graph = graph.replace(graph.entity(way.id).addNode(node.id, i + 1)); // Add only one midpoint on doubled-back segments,
+                 // turning them into self-intersections.
+
+                 return;
+               }
+             }
+           });
+           return graph;
+         };
        }
 
-       function parseError(capture, idType) {
-         var compare = capture.toLowerCase();
+       // 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));
+         };
+       }
 
-         if (_krData.localizeStrings[compare]) {
-           // some replacement strings can be localized
-           capture = _t('QA.keepRight.error_parts.' + _krData.localizeStrings[compare]);
-         }
+       function actionChangeMember(relationId, member, memberIndex) {
+         return function (graph) {
+           return graph.replace(graph.entity(relationId).updateMember(member, memberIndex));
+         };
+       }
 
-         switch (idType) {
-           // link a string like "this node"
-           case 'this':
-             capture = linkErrorObject(capture);
-             break;
+       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
 
-           case 'url':
-             capture = linkURL(capture);
-             break;
-           // link an entity ID
+           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
+           }));
+         };
+       }
 
-           case 'n':
-           case 'w':
-           case 'r':
-             capture = linkEntity(idType + capture);
-             break;
-           // some errors have more complex ID lists/variance
+       function actionChangeTags(entityId, tags) {
+         return function (graph) {
+           var entity = graph.entity(entityId);
+           return graph.replace(entity.update({
+             tags: tags
+           }));
+         };
+       }
 
-           case '20':
-             capture = parse20(capture);
-             break;
+       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?
 
-           case '211':
-             capture = parse211(capture);
-             break;
+           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
 
-           case '231':
-             capture = parse231(capture);
-             break;
+             var re = /:direction$/i;
+             var keys = Object.keys(this.tags);
 
-           case '294':
-             capture = parse294(capture);
-             break;
+             for (i = 0; i < keys.length; i++) {
+               if (re.test(keys[i])) {
+                 val = this.tags[keys[i]].toLowerCase();
+                 break;
+               }
+             }
+           }
 
-           case '370':
-             capture = parse370(capture);
-             break;
-         }
+           if (val === '') return [];
+           var cardinal = {
+             north: 0,
+             n: 0,
+             northnortheast: 22,
+             nne: 22,
+             northeast: 45,
+             ne: 45,
+             eastnortheast: 67,
+             ene: 67,
+             east: 90,
+             e: 90,
+             eastsoutheast: 112,
+             ese: 112,
+             southeast: 135,
+             se: 135,
+             southsoutheast: 157,
+             sse: 157,
+             south: 180,
+             s: 180,
+             southsouthwest: 202,
+             ssw: 202,
+             southwest: 225,
+             sw: 225,
+             westsouthwest: 247,
+             wsw: 247,
+             west: 270,
+             w: 270,
+             westnorthwest: 292,
+             wnw: 292,
+             northwest: 315,
+             nw: 315,
+             northnorthwest: 337,
+             nnw: 337
+           };
+           var values = val.split(';');
+           var results = [];
+           values.forEach(function (v) {
+             // swap cardinal for numeric directions
+             if (cardinal[v] !== undefined) {
+               v = cardinal[v];
+             } // numeric direction - just add to results
 
-         return capture;
 
-         function linkErrorObject(d) {
-           return "<a class=\"error_object_link\">".concat(d, "</a>");
-         }
+             if (v !== '' && !isNaN(+v)) {
+               results.push(+v);
+               return;
+             } // string direction - inspect parent ways
 
-         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...
+             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
+                   }
 
-         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);
+                   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;
            });
-           return newList.join(', ');
-         } // arbitrary way list of form: #ID(layer),#ID(layer),#ID(layer)...
+         },
+         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();
 
-         function parse231(capture) {
-           var newList = []; // unfortunately 'layer' can itself contain commas, so we split on '),'
+               if (way.isClosed()) {
+                 nodes.pop();
+               } // ignore connecting node if closed
+               // return true if vertex appears multiple times (way is self intersecting)
 
-           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 nodes.indexOf(this.id) !== nodes.lastIndexOf(this.id);
              }
-           });
-           return newList.join(', ');
-         } // arbitrary node/relation list of form: from node #ID,to relation #ID,to node #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';
+             });
+           });
+         },
+         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 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 actionCircularize(wayId, projection, maxAngle) {
+         maxAngle = (maxAngle || 20) * Math.PI / 180;
 
-             var role = "\"".concat(item[0], "\""); // first letter of node/relation provides the type
+         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;
+           });
 
-             var idType = item[1].slice(0, 1); // ID has # at the front
+           if (!way.isConvex(graph)) {
+             graph = action.makeConvex(graph);
+           }
 
-             var id = item[2].slice(1);
-             id = linkEntity(idType + id);
-             newList.push("".concat(role, " ").concat(item[1], " ").concat(id));
+           var nodes = utilArrayUniq(graph.childNodes(way));
+           var keyNodes = nodes.filter(function (n) {
+             return graph.parentWays(n).length !== 1;
            });
-           return newList.join(', ');
-         } // may or may not include the string "(including the name 'name')"
+           var points = nodes.map(function (n) {
+             return projection(n.loc);
+           });
+           var keyPoints = keyNodes.map(function (n) {
+             return projection(n.loc);
+           });
+           var centroid = points.length === 2 ? geoVecInterp(points[0], points[1], 0.5) : d3_polygonCentroid(points);
+           var radius = d3_median(points, function (p) {
+             return geoVecLength(centroid, p);
+           });
+           var sign = d3_polygonArea(points) > 0 ? 1 : -1;
+           var ids, i, j, k; // we need at least two key nodes for the algorithm to work
 
+           if (!keyNodes.length) {
+             keyNodes = [nodes[0]];
+             keyPoints = [points[0]];
+           }
 
-         function parse370(capture) {
-           if (!capture) return '';
-           var match = capture.match(/\(including the name (\'.+\')\)/);
+           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 (match && match.length) {
-             return _t('QA.keepRight.errorTypes.370.including_the_name', {
-               name: match[1]
-             });
-           }
 
-           return '';
-         } // arbitrary node list of form: #ID,#ID,#ID...
+           for (i = 0; i < keyPoints.length; i++) {
+             var nextKeyNodeIndex = (i + 1) % keyNodes.length;
+             var startNode = keyNodes[i];
+             var endNode = keyNodes[nextKeyNodeIndex];
+             var startNodeIndex = nodes.indexOf(startNode);
+             var endNodeIndex = nodes.indexOf(endNode);
+             var numberNewPoints = -1;
+             var indexRange = endNodeIndex - startNodeIndex;
+             var nearNodes = {};
+             var inBetweenNodes = [];
+             var startAngle, endAngle, totalAngle, eachAngle;
+             var angle, loc, node, origNode;
 
+             if (indexRange < 0) {
+               indexRange += nodes.length;
+             } // position this key node
 
-         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(', ');
-         }
-       }
 
-       var serviceKeepRight = {
-         title: 'keepRight',
-         init: function init() {
-           _mainFileFetcher.get('keepRight').then(function (d) {
-             return _krData = d;
-           });
+             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
 
-           if (!_cache) {
-             this.reset();
-           }
+             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.event = utilRebind(this, dispatch$1, 'on');
-         },
-         reset: function reset() {
-           if (_cache) {
-             Object.values(_cache.inflightTile).forEach(abortRequest);
-           }
+             if (totalAngle * sign > 0) {
+               totalAngle = -sign * (2 * Math.PI - Math.abs(totalAngle));
+             }
 
-           _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;
+             do {
+               numberNewPoints++;
+               eachAngle = totalAngle / (indexRange + numberNewPoints);
+             } while (Math.abs(eachAngle) > maxAngle); // move existing nodes
 
-           var options = {
-             format: 'geojson',
-             ch: _krRuleset
-           }; // determine the needed tiles to cover the view
 
-           var tiles = tiler.zoomExtent([_tileZoom, _tileZoom]).getTiles(projection); // abort inflight requests that are no longer needed
+             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
 
-           abortUnwantedRequests(_cache, tiles); // issue new requests..
 
-           tiles.forEach(function (tile) {
-             if (_cache.loadedTile[tile.id] || _cache.inflightTile[tile.id]) return;
+             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 _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 min = Infinity;
 
-             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.inflightTile[tile.id] = controller;
-             d3_json(url, {
-               signal: controller.signal
-             }).then(function (data) {
-               delete _cache.inflightTile[tile.id];
-               _cache.loadedTile[tile.id] = true;
+               for (var nodeId in nearNodes) {
+                 var nearAngle = nearNodes[nodeId];
+                 var dist = Math.abs(nearAngle - angle);
 
-               if (!data || !data.features || !data.features.length) {
-                 throw new Error('No Data');
+                 if (dist < min) {
+                   min = dist;
+                   origNode = origNodes[nodeId];
+                 }
                }
 
-               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)
+               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..
 
-                 var issueTemplate = _krData.errorTypes[itemType];
-                 var parentIssueType = (Math.floor(itemType / 10) * 10).toString(); // try to handle error type directly, fallback to parent error type.
 
-                 var whichType = issueTemplate ? itemType : parentIssueType;
-                 var whichTemplate = _krData.errorTypes[whichType]; // Rewrite a few of the errors at this point..
-                 // This is done to make them easier to linkify and translate.
+             if (indexRange === 1 && inBetweenNodes.length) {
+               var startIndex1 = way.nodes.lastIndexOf(startNode.id);
+               var endIndex1 = way.nodes.lastIndexOf(endNode.id);
+               var wayDirection1 = endIndex1 - startIndex1;
 
-                 switch (whichType) {
-                   case '170':
-                     description = "This feature has a FIXME tag: ".concat(description);
-                     break;
+               if (wayDirection1 < -1) {
+                 wayDirection1 = 1;
+               }
 
-                   case '292':
-                   case '293':
-                     description = description.replace('A turn-', 'This turn-');
-                     break;
+               var parentWays = graph.parentWays(keyNodes[i]);
 
-                   case '294':
-                   case '295':
-                   case '296':
-                   case '297':
-                   case '298':
-                     description = "This turn-restriction~".concat(description);
-                     break;
+               for (j = 0; j < parentWays.length; j++) {
+                 var sharedWay = parentWays[j];
+                 if (sharedWay === way) continue;
 
-                   case '300':
-                     description = 'This highway is missing a maxspeed tag';
-                     break;
+                 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;
 
-                   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 (wayDirection2 < -1) {
+                     wayDirection2 = 1;
+                   }
 
+                   if (wayDirection1 !== wayDirection2) {
+                     inBetweenNodes.reverse();
+                     insertAt = startIndex2;
+                   }
 
-                 var coincident = false;
+                   for (k = 0; k < inBetweenNodes.length; k++) {
+                     sharedWay = sharedWay.addNode(inBetweenNodes[k], insertAt + k);
+                   }
 
-                 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);
+                   graph = graph.replace(sharedWay);
+                 }
+               }
+             }
+           } // update the way to have all the new nodes
 
-                 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;
-             });
+           ids = nodes.map(function (n) {
+             return n.id;
            });
-         },
-         postUpdate: function postUpdate(d, callback) {
-           var _this2 = this;
+           ids.push(ids[0]);
+           way = way.update({
+             nodes: ids
+           });
+           graph = graph.replace(way);
+           return graph;
+         };
 
-           if (_cache.inflightPost[d.id]) {
-             return callback({
-               message: 'Error update already inflight',
-               status: -2
-             }, d);
+         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();
            }
 
-           var params = {
-             schema: d.schema,
-             id: d.id
-           };
+           for (i = 0; i < hull.length - 1; i++) {
+             var startIndex = points.indexOf(hull[i]);
+             var endIndex = points.indexOf(hull[i + 1]);
+             var indexRange = endIndex - startIndex;
 
-           if (d.newStatus) {
-             params.st = d.newStatus;
+             if (indexRange < 0) {
+               indexRange += nodes.length;
+             } // move interior nodes to the surface of the convex hull..
+
+
+             for (j = 1; j < indexRange; j++) {
+               var point = geoVecInterp(hull[i], hull[i + 1], j / indexRange);
+               var node = nodes[(j + startIndex) % nodes.length].move(projection.invert(point));
+               graph = graph.replace(node);
+             }
            }
 
-           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.
+           return graph;
+         };
 
+         action.disabled = function (graph) {
+           if (!graph.entity(wayId).isClosed()) {
+             return 'not_closed';
+           } //disable when already circular
 
-           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)
 
-           d3_json(url, {
-             signal: controller.signal
-           })["finally"](function () {
-             delete _cache.inflightPost[d.id];
+           var way = graph.entity(wayId);
+           var nodes = utilArrayUniq(graph.childNodes(way));
+           var points = nodes.map(function (n) {
+             return projection(n.loc);
+           });
+           var hull = d3_polygonHull(points);
+           var epsilonAngle = Math.PI / 180;
 
-             if (d.newStatus === 'ignore') {
-               // ignore permanently (false positive)
-               _this2.removeItem(d);
-             } else if (d.newStatus === 'ignore_t') {
-               // ignore temporarily (error fixed)
-               _this2.removeItem(d);
+           if (hull.length !== points.length || hull.length < 3) {
+             return false;
+           }
 
-               _cache.closed["".concat(d.schema, ":").concat(d.id)] = true;
-             } else {
-               d = _this2.replaceItem(d.update({
-                 comment: d.newComment,
-                 newComment: undefined,
-                 newState: undefined
-               }));
+           var centroid = d3_polygonCentroid(points);
+           var radius = geoVecLengthSquare(centroid, points[0]);
+           var i, actualPoint; // compare distances between centroid and points
+
+           for (i = 0; i < hull.length; i++) {
+             actualPoint = hull[i];
+             var actualDist = geoVecLengthSquare(actualPoint, centroid);
+             var diff = Math.abs(actualDist - radius); //compare distances with epsilon-error (5%)
+
+             if (diff > 0.05 * radius) {
+               return false;
              }
+           } //check if central angles are smaller than maxAngle
 
-             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();
-         }
-       };
+           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;
 
-       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
+             if (angle < 0) {
+               angle = -angle;
+             }
 
-       var _cache$1;
+             if (angle > Math.PI) {
+               angle = 2 * Math.PI - angle;
+             }
 
-       function abortRequest$1(i) {
-         Object.values(i).forEach(function (controller) {
-           if (controller) {
-             controller.abort();
+             if (angle > maxAngle + epsilonAngle) {
+               return false;
+             }
            }
-         });
-       }
 
-       function abortUnwantedRequests$1(cache, tiles) {
-         Object.keys(cache.inflightTile).forEach(function (k) {
-           var wanted = tiles.find(function (tile) {
-             return k === tile.id;
-           });
+           return 'already_circular';
+         };
 
-           if (!wanted) {
-             abortRequest$1(cache.inflightTile[k]);
-             delete cache.inflightTile[k];
-           }
-         });
+         action.transitionable = true;
+         return action;
        }
 
-       function encodeIssueRtree$1(d) {
-         return {
-           minX: d.loc[0],
-           minY: d.loc[1],
-           maxX: d.loc[0],
-           maxY: d.loc[1],
-           data: d
-         };
-       } // Replace or remove QAItem from rtree
+       function actionDeleteWay(wayID) {
+         function canDeleteNode(node, graph) {
+           // don't delete nodes still attached to ways or relations
+           if (graph.parentWays(node).length || graph.parentRelations(node).length) return false;
+           var geometries = osmNodeGeometriesForTags(node.tags); // don't delete if this node can be a standalone point
 
+           if (geometries.point) return false; // delete if this node only be a vertex
 
-       function updateRtree$1(item, replace) {
-         _cache$1.rtree.remove(item, function (a, b) {
-           return a.data.id === b.data.id;
-         });
+           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
 
-         if (replace) {
-           _cache$1.rtree.insert(item);
+           return !node.hasInterestingTags();
          }
-       }
 
-       function linkErrorObject(d) {
-         return "<a class=\"error_object_link\">".concat(d, "</a>");
+         var action = function action(graph) {
+           var way = graph.entity(wayID);
+           graph.parentRelations(way).forEach(function (parent) {
+             parent = parent.removeMembersWithID(wayID);
+             graph = graph.replace(parent);
+
+             if (parent.isDegenerate()) {
+               graph = actionDeleteRelation(parent.id)(graph);
+             }
+           });
+           new Set(way.nodes).forEach(function (nodeID) {
+             graph = graph.replace(way.removeNode(nodeID));
+             var node = graph.entity(nodeID);
+
+             if (canDeleteNode(node, graph)) {
+               graph = graph.remove(node);
+             }
+           });
+           return graph.remove(way);
+         };
+
+         return action;
        }
 
-       function linkEntity(d) {
-         return "<a class=\"error_entity_link\">".concat(d, "</a>");
+       function actionDeleteMultiple(ids) {
+         var actions = {
+           way: actionDeleteWay,
+           node: actionDeleteNode,
+           relation: actionDeleteRelation
+         };
+
+         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;
+         };
+
+         return action;
        }
 
-       function pointAverage(points) {
-         if (points.length) {
-           var sum = points.reduce(function (acc, point) {
-             return geoVecAdd(acc, [point.lon, point.lat]);
-           }, [0, 0]);
-           return geoVecScale(sum, 1 / points.length);
-         } else {
-           return [0, 0];
+       function actionDeleteRelation(relationID, allowUntaggedMembers) {
+         function canDeleteEntity(entity, graph) {
+           return !graph.parentWays(entity).length && !graph.parentRelations(entity).length && !entity.hasInterestingTags() && !allowUntaggedMembers;
          }
-       }
 
-       function relativeBearing(p1, p2) {
-         var angle = Math.atan2(p2.lon - p1.lon, p2.lat - p1.lat);
+         var action = function action(graph) {
+           var relation = graph.entity(relationID);
+           graph.parentRelations(relation).forEach(function (parent) {
+             parent = parent.removeMembersWithID(relationID);
+             graph = graph.replace(parent);
 
-         if (angle < 0) {
-           angle += 2 * Math.PI;
-         } // Return degrees
+             if (parent.isDegenerate()) {
+               graph = actionDeleteRelation(parent.id)(graph);
+             }
+           });
+           var memberIDs = utilArrayUniq(relation.members.map(function (m) {
+             return m.id;
+           }));
+           memberIDs.forEach(function (memberID) {
+             graph = graph.replace(relation.removeMembersWithID(memberID));
+             var entity = graph.entity(memberID);
+
+             if (canDeleteEntity(entity, graph)) {
+               graph = actionDeleteMultiple([memberID])(graph);
+             }
+           });
+           return graph.remove(relation);
+         };
 
+         return action;
+       }
 
-         return angle * 180 / Math.PI;
-       } // Assuming range [0,360)
+       function actionDeleteNode(nodeId) {
+         var action = function action(graph) {
+           var node = graph.entity(nodeId);
+           graph.parentWays(node).forEach(function (parent) {
+             parent = parent.removeNode(nodeId);
+             graph = graph.replace(parent);
 
+             if (parent.isDegenerate()) {
+               graph = actionDeleteWay(parent.id)(graph);
+             }
+           });
+           graph.parentRelations(node).forEach(function (parent) {
+             parent = parent.removeMembersWithID(nodeId);
+             graph = graph.replace(parent);
 
-       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'
+             if (parent.isDegenerate()) {
+               graph = actionDeleteRelation(parent.id)(graph);
+             }
+           });
+           return graph.remove(node);
          };
-         return _t("QA.improveOSM.directions.".concat(compass[dir]));
-       } // Errors shouldn't obscure each other
 
+         return action;
+       }
 
-       function preventCoincident(loc, bumpUp) {
-         var coincident = false;
+       //
+       // 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
+       //
 
-         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 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
 
-         return loc;
-       }
+           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.
 
-       var serviceImproveOSM = {
-         title: 'improveOSM',
-         init: function init() {
-           _mainFileFetcher.get('qa_data').then(function (d) {
-             return _impOsmData = d.improveOSM;
-           });
 
-           if (!_cache$1) {
-             this.reset();
+           for (i = 0; i < nodeIDs.length; i++) {
+             node = graph.entity(nodeIDs[i]);
+             if (node.id === survivor.id) continue;
+             parents = graph.parentWays(node);
+
+             for (j = 0; j < parents.length; j++) {
+               graph = graph.replace(parents[j].replaceNode(node.id, survivor.id));
+             }
+
+             parents = graph.parentRelations(node);
+
+             for (j = 0; j < parents.length; j++) {
+               graph = graph.replace(parents[j].replaceMember(node, survivor));
+             }
+
+             survivor = survivor.mergeTags(node.tags);
+             graph = actionDeleteNode(node.id)(graph);
            }
 
-           this.event = utilRebind(this, dispatch$2, 'on');
-         },
-         reset: function reset() {
-           if (_cache$1) {
-             Object.values(_cache$1.inflightTile).forEach(abortRequest$1);
+           graph = graph.replace(survivor); // find and delete any degenerate ways created by connecting adjacent vertices
+
+           parents = graph.parentWays(survivor);
+
+           for (i = 0; i < parents.length; i++) {
+             if (parents[i].isDegenerate()) {
+               graph = actionDeleteWay(parents[i].id)(graph);
+             }
            }
 
-           _cache$1 = {
-             data: {},
-             loadedTile: {},
-             inflightTile: {},
-             inflightPost: {},
-             closed: {},
-             rtree: new RBush()
-           };
-         },
-         loadIssues: function loadIssues(projection) {
-           var _this = this;
+           return graph;
+         };
 
-           var options = {
-             client: 'iD',
-             status: 'OPEN',
-             zoom: '19' // Use a high zoom so that clusters aren't returned
+         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
 
-           }; // determine the needed tiles to cover the view
 
-           var tiles = tiler$1.zoomExtent([_tileZoom$1, _tileZoom$1]).getTiles(projection); // abort inflight requests that are no longer needed
+           for (i = 0; i < nodeIDs.length; i++) {
+             node = graph.entity(nodeIDs[i]);
+             relations = graph.parentRelations(node);
 
-           abortUnwantedRequests$1(_cache$1, tiles); // issue new requests..
+             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
 
-           tiles.forEach(function (tile) {
-             if (_cache$1.loadedTile[tile.id] || _cache$1.inflightTile[tile.id]) return;
+               if (relation.hasFromViaTo()) {
+                 restrictionIDs.push(relation.id);
+               }
 
-             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];
+               if (seen[relation.id] !== undefined && seen[relation.id] !== role) {
+                 return 'relation';
+               } else {
+                 seen[relation.id] = role;
+               }
+             }
+           } // gather restrictions for parent ways
 
-             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];
+           for (i = 0; i < nodeIDs.length; i++) {
+             node = graph.entity(nodeIDs[i]);
+             var parents = graph.parentWays(node);
 
-                 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
+             for (j = 0; j < parents.length; j++) {
+               var parent = parents[j];
+               relations = graph.parentRelations(parent);
 
+               for (k = 0; k < relations.length; k++) {
+                 relation = relations[k];
 
-                 if (data.roadSegments) {
-                   data.roadSegments.forEach(function (feature) {
-                     // Position error at the approximate middle of the segment
-                     var points = feature.points,
-                         wayId = feature.wayId,
-                         fromNodeId = feature.fromNodeId,
-                         toNodeId = feature.toNodeId;
-                     var itemId = "".concat(wayId).concat(fromNodeId).concat(toNodeId);
-                     var mid = points.length / 2;
-                     var loc; // Even number of points, find midpoint of the middle two
-                     // Odd number of points, use position of very middle point
+                 if (relation.hasFromViaTo()) {
+                   restrictionIDs.push(relation.id);
+                 }
+               }
+             }
+           } // test restrictions
 
-                     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
 
+           restrictionIDs = utilArrayUniq(restrictionIDs);
 
-                     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
+           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)
 
-                     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 nodes = {
+               from: [],
+               via: [],
+               to: [],
+               keyfrom: [],
+               keyto: []
+             };
 
-                     _cache$1.rtree.insert(encodeIssueRtree$1(d));
-                   });
-                 } // Tiles at high zoom == missing roads
+             for (j = 0; j < relation.members.length; j++) {
+               collectNodes(relation.members[j], nodes);
+             }
 
+             nodes.keyfrom = utilArrayUniq(nodes.keyfrom.filter(hasDuplicates));
+             nodes.keyto = utilArrayUniq(nodes.keyto.filter(hasDuplicates));
+             var filter = keyNodeFilter(nodes.keyfrom, nodes.keyto);
+             nodes.from = nodes.from.filter(filter);
+             nodes.via = nodes.via.filter(filter);
+             nodes.to = nodes.to.filter(filter);
+             var connectFrom = false;
+             var connectVia = false;
+             var connectTo = false;
+             var connectKeyFrom = false;
+             var connectKeyTo = false;
 
-                 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
+             for (j = 0; j < nodeIDs.length; j++) {
+               var n = nodeIDs[j];
 
-                     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 (nodes.from.indexOf(n) !== -1) {
+                 connectFrom = true;
+               }
 
-                     if (numberOfTrips === -1) {
-                       d.desc = _t('QA.improveOSM.error_types.mr.description_alt', d.replacements);
-                     }
+               if (nodes.via.indexOf(n) !== -1) {
+                 connectVia = true;
+               }
 
-                     _cache$1.data[d.id] = d;
+               if (nodes.to.indexOf(n) !== -1) {
+                 connectTo = true;
+               }
 
-                     _cache$1.rtree.insert(encodeIssueRtree$1(d));
-                   });
-                 } // Entities at high zoom == turn restrictions
+               if (nodes.keyfrom.indexOf(n) !== -1) {
+                 connectKeyFrom = true;
+               }
 
+               if (nodes.keyto.indexOf(n) !== -1) {
+                 connectKeyTo = true;
+               }
+             }
 
-                 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
+             if (connectFrom && connectTo && !isUturn) {
+               return 'restriction';
+             }
 
-                     var loc = preventCoincident([point.lon, point.lat], true); // Elements are presented in a strange way
+             if (connectFrom && connectVia) {
+               return 'restriction';
+             }
 
-                     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
+             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.
 
-                     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 (connectKeyFrom || connectKeyTo) {
+               if (nodeIDs.length !== 2) {
+                 return 'restriction';
+               }
 
-                     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;
+               var n0 = null;
+               var n1 = null;
 
-                     _cache$1.rtree.insert(encodeIssueRtree$1(d));
+               for (j = 0; j < memberWays.length; j++) {
+                 way = memberWays[j];
 
-                     dispatch$2.call('loaded');
-                   });
+                 if (way.contains(nodeIDs[0])) {
+                   n0 = nodeIDs[0];
                  }
-               })["catch"](function () {
-                 delete _cache$1.inflightTile[tile.id][k];
 
-                 if (!Object.keys(_cache$1.inflightTile[tile.id]).length) {
-                   delete _cache$1.inflightTile[tile.id];
-                   _cache$1.loadedTile[tile.id] = true;
+                 if (way.contains(nodeIDs[1])) {
+                   n1 = nodeIDs[1];
                  }
-               });
-             });
-             _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);
-           }
+               if (n0 && n1) {
+                 // both nodes are part of the restriction
+                 var ok = false;
 
-           var key = item.issueKey;
-           var qParams = {};
+                 for (j = 0; j < memberWays.length; j++) {
+                   way = memberWays[j];
 
-           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 (way.areAdjacent(n0, n1)) {
+                     ok = true;
+                     break;
+                   }
+                 }
 
-           var url = "".concat(_impOsmUrls[key], "/retrieveComments?") + utilQsString(qParams);
+                 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 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);
-           };
+             for (j = 0; j < memberWays.length; j++) {
+               way = memberWays[j].update({}); // make copy
 
-           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);
+               for (k = 0; k < nodeIDs.length; k++) {
+                 if (nodeIDs[k] === survivor.id) continue;
+
+                 if (way.areAdjacent(nodeIDs[k], survivor.id)) {
+                   way = way.removeNode(nodeIDs[k]);
+                 } else {
+                   way = way.replaceNode(nodeIDs[k], survivor.id);
+                 }
+               }
+
+               if (way.isDegenerate()) {
+                 return 'restriction';
+               }
+             }
            }
 
-           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
+           return false; // if a key node appears multiple times (indexOf !== lastIndexOf) it's a FROM-VIA or TO-VIA junction
 
+           function hasDuplicates(n, i, arr) {
+             return arr.indexOf(n) !== arr.lastIndexOf(n);
+           }
 
-           serviceOsm.userDetails(sendPayload.bind(this));
+           function keyNodeFilter(froms, tos) {
+             return function (n) {
+               return froms.indexOf(n) === -1 && tos.indexOf(n) === -1;
+             };
+           }
 
-           function sendPayload(err, user) {
-             var _this3 = this;
+           function collectNodes(member, collection) {
+             var entity = graph.hasEntity(member.id);
+             if (!entity) return;
+             var role = member.role || '';
 
-             if (err) {
-               return callback(err, d);
+             if (!collection[role]) {
+               collection[role] = [];
              }
 
-             var key = d.issueKey;
-             var url = "".concat(_impOsmUrls[key], "/comment");
-             var payload = {
-               username: user.display_name,
-               targetIds: [d.identifier]
-             };
+             if (member.type === 'node') {
+               collection[role].push(member.id);
 
-             if (d.newStatus) {
-               payload.status = d.newStatus;
-               payload.text = 'status changed';
-             } // Comment take place of default text
+               if (role === 'via') {
+                 collection.keyfrom.push(member.id);
+                 collection.keyto.push(member.id);
+               }
+             } else if (member.type === 'way') {
+               collection[role].push.apply(collection[role], entity.nodes);
 
+               if (role === 'from' || role === 'via') {
+                 collection.keyfrom.push(entity.first());
+                 collection.keyfrom.push(entity.last());
+               }
 
-             if (d.newComment) {
-               payload.text = d.newComment;
+               if (role === 'to' || role === 'via') {
+                 collection.keyto.push(entity.first());
+                 collection.keyto.push(entity.last());
+               }
              }
+           }
+         };
 
-             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
+         return action;
+       }
 
-               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
-                 });
+       function actionCopyEntities(ids, fromGraph) {
+         var _copies = {};
 
-                 _this3.replaceItem(d.update({
-                   comments: comments,
-                   newComment: undefined
-                 }));
-               } else {
-                 _this3.removeItem(d);
+         var action = function action(graph) {
+           ids.forEach(function (id) {
+             fromGraph.entity(id).copy(fromGraph, _copies);
+           });
 
-                 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;
-                   }
+           for (var id in _copies) {
+             graph = graph.replace(_copies[id]);
+           }
 
-                   _cache$1.closed[d.issueKey] += 1;
-                 }
-               }
+           return graph;
+         };
 
-               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
+         action.copies = function () {
+           return _copies;
+         };
 
-           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;
-         }
-       };
+         return action;
+       }
 
-       var quot = /"/g;
+       function actionDeleteMember(relationId, memberIndex) {
+         return function (graph) {
+           var relation = graph.entity(relationId).removeMember(memberIndex);
+           graph = graph.replace(relation);
 
-       // 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 + '>';
-       };
+           if (relation.isDegenerate()) {
+             graph = actionDeleteRelation(relation.id)(graph);
+           }
 
-       // 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;
-         });
-       };
+           return graph;
+         };
+       }
 
-       // `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 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 = {};
 
-       var getOwnPropertyDescriptor$4 = objectGetOwnPropertyDescriptor.f;
+             for (var i = 0; i < keys.length; i++) {
+               var k = keys[i];
 
+               if (discardTags[k] || !entity.tags[k]) {
+                 didDiscard = true;
+               } else {
+                 tags[k] = entity.tags[k];
+               }
+             }
 
+             if (didDiscard) {
+               graph = graph.replace(entity.update({
+                 tags: tags
+               }));
+             }
+           }
+         };
+       }
 
+       //
+       // Optionally, disconnect only the given ways.
+       //
+       // For testing convenience, accepts an ID to assign to the (first) new node.
+       // Normally, this will be undefined and the way will automatically
+       // be assigned a new ID.
+       //
+       // This is the inverse of `iD.actionConnect`.
+       //
+       // Reference:
+       //   https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/UnjoinNodeAction.as
+       //   https://github.com/openstreetmap/josm/blob/mirror/src/org/openstreetmap/josm/actions/UnGlueAction.java
+       //
 
+       function actionDisconnect(nodeId, newNodeId) {
+         var wayIds;
 
+         var action = function 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);
 
-       var nativeEndsWith = ''.endsWith;
-       var min$8 = Math.min;
+             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;
+         };
 
-       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;
-       }();
+         action.connections = function (graph) {
+           var candidates = [];
+           var keeping = false;
+           var parentWays = graph.parentWays(graph.entity(nodeId));
+           var way, waynode;
 
-       // `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;
-         }
-       });
+           for (var i = 0; i < parentWays.length; i++) {
+             way = parentWays[i];
 
-       var getOwnPropertyDescriptor$5 = objectGetOwnPropertyDescriptor.f;
+             if (wayIds && wayIds.indexOf(way.id) === -1) {
+               keeping = true;
+               continue;
+             }
 
+             if (way.isArea() && way.nodes[0] === nodeId) {
+               candidates.push({
+                 wayID: way.id,
+                 index: 0
+               });
+             } else {
+               for (var j = 0; j < way.nodes.length; j++) {
+                 waynode = way.nodes[j];
 
+                 if (waynode === nodeId) {
+                   if (way.isClosed() && parentWays.length > 1 && wayIds && wayIds.indexOf(way.id) !== -1 && j === way.nodes.length - 1) {
+                     continue;
+                   }
 
+                   candidates.push({
+                     wayID: way.id,
+                     index: j
+                   });
+                 }
+               }
+             }
+           }
 
+           return keeping ? candidates : candidates.slice(1);
+         };
 
+         action.disabled = function (graph) {
+           var connections = action.connections(graph);
+           if (connections.length === 0) return 'not_connected';
+           var parentWays = graph.parentWays(graph.entity(nodeId));
+           var seenRelationIds = {};
+           var sharedRelation;
+           parentWays.forEach(function (way) {
+             var relations = graph.parentRelations(way);
+             relations.forEach(function (relation) {
+               if (relation.id in seenRelationIds) {
+                 if (wayIds) {
+                   if (wayIds.indexOf(way.id) !== -1 || wayIds.indexOf(seenRelationIds[relation.id]) !== -1) {
+                     sharedRelation = relation;
+                   }
+                 } else {
+                   sharedRelation = relation;
+                 }
+               } else {
+                 seenRelationIds[relation.id] = way.id;
+               }
+             });
+           });
+           if (sharedRelation) return 'relation';
+         };
 
-       var nativeStartsWith = ''.startsWith;
-       var min$9 = Math.min;
+         action.limitWays = function (val) {
+           if (!arguments.length) return wayIds;
+           wayIds = val;
+           return action;
+         };
 
-       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;
-       }();
+         return action;
+       }
 
-       // `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 actionExtract(entityID, projection) {
+         var extractedNodeID;
 
-       var $trimEnd = stringTrim.end;
+         var action = function action(graph) {
+           var entity = graph.entity(entityID);
 
+           if (entity.type === 'node') {
+             return extractFromNode(entity, graph);
+           }
 
-       var FORCED$e = stringTrimForced('trimEnd');
+           return extractFromWayOrRelation(entity, graph);
+         };
 
-       var trimEnd = FORCED$e ? function trimEnd() {
-         return $trimEnd(this);
-       } : ''.trimEnd;
+         function extractFromNode(node, graph) {
+           extractedNodeID = node.id; // Create a new node to replace the one we will detach
 
-       // `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
-       });
+           var replacement = osmNode({
+             loc: node.loc
+           });
+           graph = graph.replace(replacement); // Process each way in turn, updating the graph as we go
 
-       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
-           };
-         }
+           graph = graph.parentWays(node).reduce(function (accGraph, parentWay) {
+             return accGraph.replace(parentWay.replaceNode(entityID, replacement.id));
+           }, graph); // Process any relations too
 
-         function changeDefaults(newDefaults) {
-           module.exports.defaults = newDefaults;
+           return graph.parentRelations(node).reduce(function (accGraph, parentRel) {
+             return accGraph.replace(parentRel.replaceMember(node, replacement));
+           }, graph);
          }
 
-         module.exports = {
-           defaults: getDefaults(),
-           getDefaults: getDefaults,
-           changeDefaults: changeDefaults
-         };
-       });
+         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);
 
-       /**
-        * Helpers
-        */
-       var escapeTest = /[&<>"']/;
-       var escapeReplace = /[&<>"']/g;
-       var escapeTestNoEncode = /[<>"']|&(?!#?\w+;)/;
-       var escapeReplaceNoEncode = /[<>"']|&(?!#?\w+;)/g;
-       var escapeReplacements = {
-         '&': '&amp;',
-         '<': '&lt;',
-         '>': '&gt;',
-         '"': '&quot;',
-         "'": '&#39;'
-       };
+           if (!extractedLoc || !isFinite(extractedLoc[0]) || !isFinite(extractedLoc[1])) {
+             extractedLoc = entity.extent(graph).center();
+           }
 
-       var getEscapeReplacement = function getEscapeReplacement(ch) {
-         return escapeReplacements[ch];
-       };
+           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 escape$1(html, encode) {
-         if (encode) {
-           if (escapeTest.test(html)) {
-             return html.replace(escapeReplace, getEscapeReplacement);
-           }
-         } else {
-           if (escapeTestNoEncode.test(html)) {
-             return html.replace(escapeReplaceNoEncode, getEscapeReplacement);
-           }
-         }
+           var pointTags = {};
 
-         return html;
-       }
+           for (var key in entityTags) {
+             if (entity.type === 'relation' && key === 'type') {
+               continue;
+             }
 
-       var unescapeTest = /&(#(?:\d+)|(?:#x[0-9A-Fa-f]+)|(?:\w+));?/ig;
+             if (keysToRetain.indexOf(key) !== -1) {
+               continue;
+             }
 
-       function unescape$1(html) {
-         // explicitly match decimal, hex, and named HTML entities
-         return html.replace(unescapeTest, function (_, n) {
-           n = n.toLowerCase();
-           if (n === 'colon') return ':';
+             if (isBuilding) {
+               // don't transfer building-related tags
+               if (buildingKeysToRetain.indexOf(key) !== -1 || key.match(/^building:.{1,}/) || key.match(/^roof:.{1,}/)) continue;
+             } // leave `indoor` tag on the area
 
-           if (n.charAt(0) === '#') {
-             return n.charAt(1) === 'x' ? String.fromCharCode(parseInt(n.substring(2), 16)) : String.fromCharCode(+n.substring(1));
-           }
 
-           return '';
-         });
-       }
+             if (isIndoorArea && key === 'indoor') {
+               continue;
+             } // copy the tag from the entity to the point
 
-       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;
-       }
+             pointTags[key] = entityTags[key]; // leave addresses and some other tags so they're on both features
 
-       var nonWordAndColonTest = /[^\w:]/g;
-       var originIndependentUrl = /^$|^[a-z][a-z0-9+.-]*:|^[?#]/i;
+             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 cleanUrl(sanitize, base, href) {
-         if (sanitize) {
-           var prot;
 
-           try {
-             prot = decodeURIComponent(unescape$1(href)).replace(nonWordAndColonTest, '').toLowerCase();
-           } catch (e) {
-             return null;
+             delete entityTags[key];
            }
 
-           if (prot.indexOf('javascript:') === 0 || prot.indexOf('vbscript:') === 0 || prot.indexOf('data:') === 0) {
-             return null;
+           if (!isBuilding && !isIndoorArea && fromGeometry === 'area') {
+             // ensure that areas keep area geometry
+             entityTags.area = 'yes';
            }
-         }
 
-         if (base && !originIndependentUrl.test(href)) {
-           href = resolveUrl(base, href);
+           var replacement = osmNode({
+             loc: extractedLoc,
+             tags: pointTags
+           });
+           graph = graph.replace(replacement);
+           extractedNodeID = replacement.id;
+           return graph.replace(entity.update({
+             tags: entityTags
+           }));
          }
 
-         try {
-           href = encodeURI(href).replace(/%25/g, '%');
-         } catch (e) {
-           return null;
-         }
+         action.getExtractedNodeID = function () {
+           return extractedNodeID;
+         };
 
-         return href;
+         return action;
        }
 
-       var baseUrls = {};
-       var justDomain = /^[^:]+:\/*[^/]*$/;
-       var protocol = /^([^:]+:)[\s\S]*$/;
-       var domain = /^([^:]+:\/*[^/]*)[\s\S]*$/;
+       //
+       // This is the inverse of `iD.actionSplit`.
+       //
+       // Reference:
+       //   https://github.com/systemed/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/MergeWaysAction.as
+       //   https://github.com/openstreetmap/josm/blob/mirror/src/org/openstreetmap/josm/actions/CombineWayAction.java
+       //
 
-       function 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 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);
+           }));
          }
 
-         base = baseUrls[' ' + base];
-         var relativeBase = base.indexOf(':') === -1;
+         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
 
-         if (href.substring(0, 2) === '//') {
-           if (relativeBase) {
-             return href;
-           }
+           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.
 
-           return base.replace(protocol, '$1') + href;
-         } else if (href.charAt(0) === '/') {
-           if (relativeBase) {
-             return href;
+           for (var i = 0; i < ways.length; i++) {
+             if (!ways[i].isNew()) {
+               survivorID = ways[i].id;
+               break;
+             }
            }
 
-           return base.replace(domain, '$1') + href;
-         } else {
-           return base + href;
-         }
-       }
+           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 noopTest = {
-         exec: function noopTest() {}
-       };
+           graph = sequences.actions.reduce(function (g, action) {
+             return action(g);
+           }, graph);
+           var survivor = graph.entity(survivorID);
+           survivor = survivor.update({
+             nodes: joined.nodes.map(function (n) {
+               return n.id;
+             })
+           });
+           graph = graph.replace(survivor);
+           joined.forEach(function (way) {
+             if (way.id === survivorID) return;
+             graph.parentRelations(way).forEach(function (parent) {
+               graph = graph.replace(parent.replaceMember(way, survivor));
+             });
+             survivor = survivor.mergeTags(way.tags);
+             graph = graph.replace(survivor);
+             graph = actionDeleteWay(way.id)(graph);
+           }); // Finds if the join created a single-member multipolygon,
+           // and if so turns it into a basic area instead
 
-       function merge$1(obj) {
-         var i = 1,
-             target,
-             key;
+           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
 
-         for (; i < arguments.length; i++) {
-           target = arguments[i];
+             if (multipolygons.length !== 1) return;
+             var multipolygon = multipolygons[0];
 
-           for (key in target) {
-             if (Object.prototype.hasOwnProperty.call(target, key)) {
-               obj[key] = target[key];
+             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;
              }
-           }
-         }
 
-         return obj;
-       }
+             survivor = survivor.mergeTags(multipolygon.tags);
+             graph = graph.replace(survivor);
+             graph = actionDeleteRelation(multipolygon.id, true
+             /* allow untagged members */
+             )(graph);
+             var tags = Object.assign({}, survivor.tags);
 
-       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;
+             if (survivor.geometry(graph) !== 'area') {
+               // ensure the feature persists as an area
+               tags.area = 'yes';
+             }
 
-           while (--curr >= 0 && str[curr] === '\\') {
-             escaped = !escaped;
-           }
+             delete tags.type; // remove type=multipolygon
 
-           if (escaped) {
-             // odd number of slashes means | is escaped
-             // so we leave it alone
-             return '|';
-           } else {
-             // add space before unescaped |
-             return ' |';
+             survivor = survivor.update({
+               tags: tags
+             });
+             graph = graph.replace(survivor);
            }
-         }),
-             cells = row.split(/ \|/);
-         var i = 0;
 
-         if (cells.length > count) {
-           cells.splice(count);
-         } else {
-           while (cells.length < count) {
-             cells.push('');
+           checkForSimpleMultipolygon();
+           return graph;
+         }; // Returns the number of nodes the resultant way is expected to have
+
+
+         action.resultingWayNodesLength = function (graph) {
+           return ids.reduce(function (count, id) {
+             return count + graph.entity(id).nodes.length;
+           }, 0) - ids.length - 1;
+         };
+
+         action.disabled = function (graph) {
+           var geometries = groupEntitiesByGeometry(graph);
+
+           if (ids.length < 2 || ids.length !== geometries.line.length) {
+             return 'not_eligible';
            }
-         }
 
-         for (; i < cells.length; i++) {
-           // leading or trailing whitespace is ignored per the gfm spec
-           cells[i] = cells[i].trim().replace(/\\\|/g, '|');
-         }
+           var joined = osmJoinWays(ids.map(graph.entity, graph), graph);
 
-         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.
+           if (joined.length > 1) {
+             return 'not_adjacent';
+           } // Loop through all combinations of path-pairs
+           // to check potential intersections between all pairs
 
 
-       function rtrim$1(str, c, invert) {
-         var l = str.length;
+           for (var i = 0; i < ids.length - 1; i++) {
+             for (var j = i + 1; j < ids.length; j++) {
+               var path1 = graph.childNodes(graph.entity(ids[i])).map(function (e) {
+                 return e.loc;
+               });
+               var path2 = graph.childNodes(graph.entity(ids[j])).map(function (e) {
+                 return e.loc;
+               });
+               var intersections = geoPathIntersections(path1, path2); // Check if intersections are just nodes lying on top of
+               // each other/the line, as opposed to crossing it
+
+               var common = utilArrayIntersection(joined[0].nodes.map(function (n) {
+                 return n.loc.toString();
+               }), intersections.map(function (n) {
+                 return n.toString();
+               }));
 
-         if (l === 0) {
-           return '';
-         } // Length of suffix matching the invert condition.
+               if (common.length !== intersections.length) {
+                 return 'paths_intersect';
+               }
+             }
+           }
 
+           var nodeIds = joined[0].nodes.map(function (n) {
+             return n.id;
+           }).slice(1, -1);
+           var relation;
+           var tags = {};
+           var conflicting = false;
+           joined[0].forEach(function (way) {
+             var parents = graph.parentRelations(way);
+             parents.forEach(function (parent) {
+               if (parent.isRestriction() && parent.members.some(function (m) {
+                 return nodeIds.indexOf(m.id) >= 0;
+               })) {
+                 relation = parent;
+               }
+             });
 
-         var suffLen = 0; // Step left until we fail to match the invert condition.
+             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;
+               }
+             }
+           });
 
-         while (suffLen < l) {
-           var currChar = str.charAt(l - suffLen - 1);
+           if (relation) {
+             return 'restriction';
+           }
 
-           if (currChar === c && !invert) {
-             suffLen++;
-           } else if (currChar !== c && invert) {
-             suffLen++;
-           } else {
-             break;
+           if (conflicting) {
+             return 'conflicting_tags';
            }
-         }
+         };
 
-         return str.substr(0, l - suffLen);
+         return action;
        }
 
-       function findClosingBracket(str, b) {
-         if (str.indexOf(b[1]) === -1) {
-           return -1;
+       function actionMerge(ids) {
+         function groupEntitiesByGeometry(graph) {
+           var entities = ids.map(function (id) {
+             return graph.entity(id);
+           });
+           return Object.assign({
+             point: [],
+             area: [],
+             line: [],
+             relation: []
+           }, utilArrayGroupBy(entities, function (entity) {
+             return entity.geometry(graph);
+           }));
          }
 
-         var l = str.length;
-         var level = 0,
-             i = 0;
+         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;
 
-         for (; i < l; i++) {
-           if (str[i] === '\\') {
-             i++;
-           } else if (str[i] === b[0]) {
-             level++;
-           } else if (str[i] === b[1]) {
-             level--;
+             for (var i = 0; i < nodes.length; i++) {
+               var node = nodes[i];
 
-             if (level < 0) {
-               return 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
 
-         return -1;
-       }
 
-       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
+               graph = graph.replace(point.update({
+                 tags: {},
+                 loc: node.loc
+               }));
+               target = target.replaceNode(node.id, point.id);
+               graph = graph.replace(target);
+               removeNode = node;
+               break;
+             }
 
+             graph = graph.remove(removeNode);
+           });
 
-       function repeatString(pattern, count) {
-         if (count < 1) {
-           return '';
-         }
+           if (target.tags.area === 'yes') {
+             var tags = Object.assign({}, target.tags); // shallow copy
 
-         var result = '';
+             delete tags.area;
 
-         while (count > 1) {
-           if (count & 1) {
-             result += pattern;
+             if (osmTagSuggestingArea(tags)) {
+               // remove the `area` tag if area geometry is now implied - #3851
+               target = target.update({
+                 tags: tags
+               });
+               graph = graph.replace(target);
+             }
            }
 
-           count >>= 1;
-           pattern += pattern;
-         }
+           return graph;
+         };
 
-         return result + pattern;
+         action.disabled = function (graph) {
+           var geometries = groupEntitiesByGeometry(graph);
+
+           if (geometries.point.length === 0 || geometries.area.length + geometries.line.length !== 1 || geometries.relation.length !== 0) {
+             return 'not_eligible';
+           }
+         };
+
+         return action;
        }
 
-       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
-       };
+       //
+       // 1. move all the nodes to a common location
+       // 2. `actionConnect` them
 
-       var defaults$1 = defaults.defaults;
-       var rtrim$2 = helpers.rtrim,
-           splitCells$1 = helpers.splitCells,
-           _escape = helpers.escape,
-           findClosingBracket$1 = helpers.findClosingBracket;
+       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;
 
-       function outputLink(cap, link, raw) {
-         var href = link.href;
-         var title = link.title ? _escape(link.title) : null;
-         var text = cap[1].replace(/\\([\[\]])/g, '$1');
+           for (var i = 0; i < nodeIDs.length; i++) {
+             var node = graph.entity(nodeIDs[i]);
 
-         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)
-           };
-         }
-       }
+             if (node.hasInterestingTags()) {
+               interestingLoc = ++interestingCount === 1 ? node.loc : null;
+             }
 
-       function indentCodeCompensation(raw, text) {
-         var matchIndentToCode = raw.match(/^(\s+)(?:```)/);
+             sum = geoVecAdd(sum, node.loc);
+           }
 
-         if (matchIndentToCode === null) {
-           return text;
+           return interestingLoc || geoVecScale(sum, 1 / nodeIDs.length);
          }
 
-         var indentToCode = matchIndentToCode[1];
-         return text.split('\n').map(function (node) {
-           var matchIndentInNode = node.match(/^\s+/);
+         var action = function action(graph) {
+           if (nodeIDs.length < 2) return graph;
+           var toLoc = loc;
 
-           if (matchIndentInNode === null) {
-             return node;
+           if (!toLoc) {
+             toLoc = chooseLoc(graph);
            }
 
-           var _matchIndentInNode = _slicedToArray(matchIndentInNode, 1),
-               indentInNode = _matchIndentInNode[0];
+           for (var i = 0; i < nodeIDs.length; i++) {
+             var node = graph.entity(nodeIDs[i]);
 
-           if (indentInNode.length >= indentToCode.length) {
-             return node.slice(indentToCode.length);
+             if (node.loc !== toLoc) {
+               graph = graph.replace(node.move(toLoc));
+             }
            }
 
-           return node;
-         }).join('\n');
-       }
-       /**
-        * Tokenizer
-        */
+           return actionConnect(nodeIDs)(graph);
+         };
 
+         action.disabled = function (graph) {
+           if (nodeIDs.length < 2) return 'not_eligible';
 
-       var Tokenizer_1 = /*#__PURE__*/function () {
-         function Tokenizer(options) {
-           _classCallCheck(this, Tokenizer);
+           for (var i = 0; i < nodeIDs.length; i++) {
+             var entity = graph.entity(nodeIDs[i]);
+             if (entity.type !== 'node') return 'not_eligible';
+           }
 
-           this.options = options || defaults$1;
-         }
+           return actionConnect(nodeIDs).disabled(graph);
+         };
 
-         _createClass(Tokenizer, [{
-           key: "space",
-           value: function space(src) {
-             var cap = this.rules.block.newline.exec(src);
+         return action;
+       }
 
-             if (cap) {
-               if (cap[0].length > 1) {
-                 return {
-                   type: 'space',
-                   raw: cap[0]
-                 };
+       function osmChangeset() {
+         if (!(this instanceof osmChangeset)) {
+           return new osmChangeset().initialize(arguments);
+         } else if (arguments.length) {
+           this.initialize(arguments);
+         }
+       }
+       osmEntity.changeset = osmChangeset;
+       osmChangeset.prototype = Object.create(osmEntity.prototype);
+       Object.assign(osmChangeset.prototype, {
+         type: 'changeset',
+         extent: function extent() {
+           return new geoExtent();
+         },
+         geometry: function geometry() {
+           return 'changeset';
+         },
+         asJXON: function asJXON() {
+           return {
+             osm: {
+               changeset: {
+                 tag: Object.keys(this.tags).map(function (k) {
+                   return {
+                     '@k': k,
+                     '@v': this.tags[k]
+                   };
+                 }, this),
+                 '@version': 0.6,
+                 '@generator': 'iD'
                }
+             }
+           };
+         },
+         // Generate [osmChange](http://wiki.openstreetmap.org/wiki/OsmChange)
+         // XML. Returns a string.
+         osmChangeJXON: function osmChangeJXON(changes) {
+           var changeset_id = this.id;
 
-               return {
-                 raw: '\n'
-               };
+           function nest(x, order) {
+             var groups = {};
+
+             for (var i = 0; i < x.length; i++) {
+               var tagName = Object.keys(x[i])[0];
+               if (!groups[tagName]) groups[tagName] = [];
+               groups[tagName].push(x[i][tagName]);
              }
-           }
-         }, {
-           key: "code",
-           value: function code(src, tokens) {
-             var cap = this.rules.block.code.exec(src);
 
-             if (cap) {
-               var lastToken = tokens[tokens.length - 1]; // An indented code block cannot interrupt a paragraph.
+             var ordered = {};
+             order.forEach(function (o) {
+               if (groups[o]) ordered[o] = groups[o];
+             });
+             return ordered;
+           } // sort relations in a changeset by dependencies
 
-               if (lastToken && lastToken.type === 'paragraph') {
-                 return {
-                   raw: cap[0],
-                   text: cap[0].trimRight()
-                 };
-               }
 
-               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);
+           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
 
-             if (cap) {
-               var raw = cap[0];
-               var text = indentCodeCompensation(raw, cap[3] || '');
-               return {
-                 type: 'code',
-                 raw: raw,
-                 lang: cap[2] ? cap[2].trim() : cap[2],
-                 text: text
-               };
-             }
-           }
-         }, {
-           key: "heading",
-           value: function heading(src) {
-             var cap = this.rules.block.heading.exec(src);
 
-             if (cap) {
-               return {
-                 type: 'heading',
-                 raw: cap[0],
-                 depth: cap[1].length,
-                 text: cap[2]
-               };
+             function isNew(item) {
+               return !sorted[item['@id']] && !processing.find(function (proc) {
+                 return proc['@id'] === item['@id'];
+               });
              }
-           }
-         }, {
-           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]
-               };
+             var processing = [];
+             var sorted = {};
+             var relations = changes.relation;
+             if (!relations) return changes;
 
-               if (item.header.length === item.align.length) {
-                 var l = item.align.length;
-                 var i;
+             for (var i = 0; i < relations.length; i++) {
+               var relation = relations[i]; // skip relation if already sorted
 
-                 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 (!sorted[relation['@id']]) {
+                 processing.push(relation);
+               }
 
-                 l = item.cells.length;
+               while (processing.length > 0) {
+                 var next = processing[0],
+                     deps = next.member.map(resolve).filter(Boolean).filter(isNew);
 
-                 for (i = 0; i < l; i++) {
-                   item.cells[i] = splitCells$1(item.cells[i], item.header.length);
+                 if (deps.length === 0) {
+                   sorted[next['@id']] = next;
+                   processing.shift();
+                 } else {
+                   processing = deps.concat(processing);
                  }
-
-                 return item;
                }
              }
-           }
-         }, {
-           key: "hr",
-           value: function hr(src) {
-             var cap = this.rules.block.hr.exec(src);
 
-             if (cap) {
-               return {
-                 type: 'hr',
-                 raw: cap[0]
-               };
-             }
+             changes.relation = Object.values(sorted);
+             return changes;
            }
-         }, {
-           key: "blockquote",
-           value: function blockquote(src) {
-             var cap = this.rules.block.blockquote.exec(src);
 
-             if (cap) {
-               var text = cap[0].replace(/^ *> ?/gm, '');
-               return {
-                 type: 'blockquote',
-                 raw: cap[0],
-                 text: text
-               };
-             }
+           function rep(entity) {
+             return entity.asJXON(changeset_id);
            }
-         }, {
-           key: "list",
-           value: function list(src) {
-             var cap = this.rules.block.list.exec(src);
-
-             if (cap) {
-               var raw = cap[0];
-               var bull = cap[2];
-               var isordered = bull.length > 1;
-               var list = {
-                 type: 'list',
-                 raw: raw,
-                 ordered: isordered,
-                 start: isordered ? +bull.slice(0, -1) : '',
-                 loose: false,
-                 items: []
-               }; // Get each top-level item.
-
-               var itemMatch = cap[0].match(this.rules.block.item);
-               var next = false,
-                   item,
-                   space,
-                   bcurr,
-                   bnext,
-                   addBack,
-                   loose,
-                   istask,
-                   ischecked;
-               var l = itemMatch.length;
-               bcurr = this.rules.block.listItemStart.exec(itemMatch[0]);
-
-               for (var i = 0; i < l; i++) {
-                 item = itemMatch[i];
-                 raw = item; // Determine whether the next list item belongs here.
-                 // Backpedal if it does not belong in this list.
-
-                 if (i !== l - 1) {
-                   bnext = this.rules.block.listItemStart.exec(itemMatch[i + 1]);
-
-                   if (bnext[1].length > bcurr[0].length || bnext[1].length > 3) {
-                     // nested list
-                     itemMatch.splice(i, 2, itemMatch[i] + '\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');
-                       list.raw = list.raw.substring(0, list.raw.length - addBack.length);
-                       i = l - 1;
-                     }
-                   }
-
-                   bcurr = bnext;
-                 } // Remove the list item's bullet
-                 // so it is seen as the next token.
 
+           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 {};
+         }
+       });
 
-                 space = item.length;
-                 item = item.replace(/^ *([*+-]|\d+[.)]) ?/, ''); // Outdent whatever the
-                 // list item contains. Hacky.
-
-                 if (~item.indexOf('\n ')) {
-                   space -= item.length;
-                   item = !this.options.pedantic ? item.replace(new RegExp('^ {1,' + space + '}', 'gm'), '') : item.replace(/^ {1,4}/gm, '');
-                 } // Determine whether item is loose or not.
-                 // Use: /(^|\n)(?! )[^\n]+\n\n(?!\s*$)/
-                 // for discount behavior.
+       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--;
+       };
 
-                 loose = next || /\n\n(?!\s*$)/.test(item);
+       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];
 
-                 if (i !== l - 1) {
-                   next = item.charAt(item.length - 1) === '\n';
-                   if (!loose) loose = next;
+             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 (loose) {
-                   list.loose = true;
-                 } // Check for task list items
+           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({
+             loc: loc
+           });
+         }
+       });
 
-                 istask = /^\[[ xX]\] /.test(item);
-                 ischecked = undefined;
+       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);
 
-                 if (istask) {
-                   ischecked = item[1] !== ' ';
-                   item = item.replace(/^\[[ xX]\] +/, '');
-                 }
+       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;
+       };
 
-                 list.items.push({
-                   type: 'list_item',
-                   raw: raw,
-                   task: istask,
-                   checked: ischecked,
-                   loose: loose,
-                   text: item
-                 });
-               }
+       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();
 
-               return list;
+             for (var i = 0; i < this.members.length; i++) {
+               var member = resolver.hasEntity(this.members[i].id);
+
+               if (member) {
+                 extent._extend(member.extent(resolver, memo));
+               }
              }
+
+             return extent;
+           });
+         },
+         geometry: function geometry(graph) {
+           return graph["transient"](this, 'geometry', function () {
+             return this.isMultipolygon() ? 'area' : 'relation';
+           });
+         },
+         isDegenerate: function isDegenerate() {
+           return this.members.length === 0;
+         },
+         // Return an array of members, each extended with an 'index' property whose value
+         // is the member index.
+         indexedMembers: function indexedMembers() {
+           var result = new Array(this.members.length);
+
+           for (var i = 0; i < this.members.length; i++) {
+             result[i] = Object.assign({}, this.members[i], {
+               index: i
+             });
            }
-         }, {
-           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]
-               };
+           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
+               });
              }
            }
-         }, {
-           key: "def",
-           value: function def(src) {
-             var cap = this.rules.block.def.exec(src);
+         },
+         // Same as memberByRole, but returns all members with the given role
+         membersByRole: function membersByRole(role) {
+           var result = [];
 
-             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]
-               };
+           for (var i = 0; i < this.members.length; i++) {
+             if (this.members[i].role === role) {
+               result.push(Object.assign({}, this.members[i], {
+                 index: i
+               }));
              }
            }
-         }, {
-           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') : []
-               };
-
-               if (item.header.length === item.align.length) {
-                 item.raw = cap[0];
-                 var l = item.align.length;
-                 var i;
-
-                 for (i = 0; i < l; i++) {
-                   if (/^ *-+: *$/.test(item.align[i])) {
-                     item.align[i] = 'right';
-                   } else if (/^ *:-+: *$/.test(item.align[i])) {
-                     item.align[i] = 'center';
-                   } else if (/^ *:-+ *$/.test(item.align[i])) {
-                     item.align[i] = 'left';
-                   } else {
-                     item.align[i] = null;
-                   }
-                 }
-
-                 l = item.cells.length;
-
-                 for (i = 0; i < l; i++) {
-                   item.cells[i] = splitCells$1(item.cells[i].replace(/^ *\| *| *\| *$/g, ''), item.header.length);
-                 }
 
-                 return item;
-               }
+           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
+               });
              }
            }
-         }, {
-           key: "lheading",
-           value: function lheading(src) {
-             var cap = this.rules.block.lheading.exec(src);
-
-             if (cap) {
-               return {
-                 type: 'heading',
-                 raw: cap[0],
-                 depth: cap[2].charAt(0) === '=' ? 1 : 2,
-                 text: cap[1]
-               };
+         },
+         // 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
+               });
              }
            }
-         }, {
-           key: "paragraph",
-           value: function paragraph(src) {
-             var cap = this.rules.block.paragraph.exec(src);
+         },
+         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 = [];
 
-             if (cap) {
-               return {
-                 type: 'paragraph',
-                 raw: cap[0],
-                 text: cap[1].charAt(cap[1].length - 1) === '\n' ? cap[1].slice(0, -1) : cap[1]
-               };
+           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
+               });
              }
            }
-         }, {
-           key: "text",
-           value: function text(src, tokens) {
-             var cap = this.rules.block.text.exec(src);
-
-             if (cap) {
-               var lastToken = tokens[tokens.length - 1];
 
-               if (lastToken && lastToken.type === 'text') {
+           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 {
-                   raw: cap[0],
-                   text: cap[0]
+                   keyAttributes: {
+                     type: member.type,
+                     role: member.role,
+                     ref: osmEntity.id.toOSM(member.id)
+                   }
                  };
-               }
-
-               return {
-                 type: 'text',
-                 raw: cap[0],
-                 text: cap[0]
-               };
+               }, 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;
            }
-         }, {
-           key: "escape",
-           value: function escape(src) {
-             var cap = this.rules.inline.escape.exec(src);
 
-             if (cap) {
+           return r;
+         },
+         asGeoJSON: function asGeoJSON(resolver) {
+           return resolver["transient"](this, 'GeoJSON', function () {
+             if (this.isMultipolygon()) {
                return {
-                 type: 'escape',
-                 raw: cap[0],
-                 text: _escape(cap[1])
+                 type: 'MultiPolygon',
+                 coordinates: this.multipolygon(resolver)
                };
-             }
-           }
-         }, {
-           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;
-               }
-
-               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;
-               }
-
+             } else {
                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]
+                 type: 'FeatureCollection',
+                 properties: this.tags,
+                 features: this.members.map(function (member) {
+                   return Object.assign({
+                     role: member.role
+                   }, resolver.entity(member.id).asGeoJSON(resolver));
+                 })
                };
              }
-           }
-         }, {
-           key: "link",
-           value: function link(src) {
-             var cap = this.rules.inline.link.exec(src);
-
-             if (cap) {
-               var lastParenIndex = findClosingBracket$1(cap[2], '()');
-
-               if (lastParenIndex > -1) {
-                 var start = cap[0].indexOf('!') === 0 ? 5 : 4;
-                 var linkLen = start + cap[1].length + lastParenIndex;
-                 cap[2] = cap[2].substring(0, lastParenIndex);
-                 cap[0] = cap[0].substring(0, linkLen).trim();
-                 cap[3] = '';
-               }
-
-               var href = cap[2];
-               var title = '';
-
-               if (this.options.pedantic) {
-                 var link = /^([^'"]*[^\s])\s+(['"])(.*)\2/.exec(href);
-
-                 if (link) {
-                   href = link[1];
-                   title = link[3];
-                 } else {
-                   title = '';
-                 }
-               } else {
-                 title = cap[3] ? cap[3].slice(1, -1) : '';
-               }
-
-               href = href.trim().replace(/^<([\s\S]*)>$/, '$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;
+           });
+         },
+         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;
              }
            }
-         }, {
-           key: "reflink",
-           value: function reflink(src, links) {
-             var cap;
-
-             if ((cap = this.rules.inline.reflink.exec(src)) || (cap = this.rules.inline.nolink.exec(src))) {
-               var link = (cap[2] || cap[1]).replace(/\s+/g, ' ');
-               link = links[link.toLowerCase()];
 
-               if (!link || !link.href) {
-                 var text = cap[0].charAt(0);
-                 return {
-                   type: 'text',
-                   raw: text,
-                   text: text
-                 };
-               }
+           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 token = outputLink(cap, link, cap[0]);
-               return token;
+           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]);
              }
-           }
-         }, {
-           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;
-
-               while ((match = endReg.exec(maskedSrc)) != null) {
-                 cap = this.rules.inline.strong.middle.exec(maskedSrc.slice(0, match.index + 3));
+             return sequence.nodes.map(function (node) {
+               return node.loc;
+             });
+           };
 
-                 if (cap) {
-                   return {
-                     type: 'strong',
-                     raw: src.slice(0, cap[0].length),
-                     text: src.slice(2, cap[0].length - 2)
-                   };
-                 }
-               }
-             }
-           }
-         }, {
-           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);
+           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 (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;
+           function findOuter(inner) {
+             var o, outer;
 
-               while ((match = endReg.exec(maskedSrc)) != null) {
-                 cap = this.rules.inline.em.middle.exec(maskedSrc.slice(0, match.index + 2));
+             for (o = 0; o < outers.length; o++) {
+               outer = outers[o];
 
-                 if (cap) {
-                   return {
-                     type: 'em',
-                     raw: src.slice(0, cap[0].length),
-                     text: src.slice(1, cap[0].length - 1)
-                   };
-                 }
+               if (geoPolygonContainsPolygon(outer, inner)) {
+                 return o;
                }
              }
-           }
-         }, {
-           key: "codespan",
-           value: function codespan(src) {
-             var cap = this.rules.inline.code.exec(src);
 
-             if (cap) {
-               var text = cap[2].replace(/\n/g, ' ');
-               var hasNonSpaceChars = /[^ ]/.test(text);
-               var hasSpaceCharsOnBothEnds = text.startsWith(' ') && text.endsWith(' ');
+             for (o = 0; o < outers.length; o++) {
+               outer = outers[o];
 
-               if (hasNonSpaceChars && hasSpaceCharsOnBothEnds) {
-                 text = text.substring(1, text.length - 1);
+               if (geoPolygonIntersectsPolygon(outer, inner, false)) {
+                 return o;
                }
-
-               text = _escape(text, true);
-               return {
-                 type: 'codespan',
-                 raw: cap[0],
-                 text: text
-               };
              }
            }
-         }, {
-           key: "br",
-           value: function br(src) {
-             var cap = this.rules.inline.br.exec(src);
 
-             if (cap) {
-               return {
-                 type: 'br',
-                 raw: cap[0]
-               };
-             }
-           }
-         }, {
-           key: "del",
-           value: function del(src) {
-             var cap = this.rules.inline.del.exec(src);
+           for (var i = 0; i < inners.length; i++) {
+             var inner = inners[i];
 
-             if (cap) {
-               return {
-                 type: 'del',
-                 raw: cap[0],
-                 text: cap[1]
-               };
+             if (d3_geoArea({
+               type: 'Polygon',
+               coordinates: [inner]
+             }) < 2 * Math.PI) {
+               inner = inner.reverse();
              }
-           }
-         }, {
-           key: "autolink",
-           value: function autolink(src, mangle) {
-             var cap = this.rules.inline.autolink.exec(src);
 
-             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 o = findOuter(inners[i]);
 
-               return {
-                 type: 'link',
-                 raw: cap[0],
-                 text: text,
-                 href: href,
-                 tokens: [{
-                   type: 'text',
-                   raw: text,
-                   text: text
-                 }]
-               };
+             if (o !== undefined) {
+               result[o].push(inners[i]);
+             } else {
+               result.push([inners[i]]); // Invalid geometry
              }
            }
-         }, {
-           key: "url",
-           value: function url(src, mangle) {
-             var cap;
-
-             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;
+           return result;
+         }
+       });
 
-                 do {
-                   prevCapZero = cap[0];
-                   cap[0] = this.rules.inline._backpedal.exec(cap[0])[0];
-                 } while (prevCapZero !== cap[0]);
+       var QAItem = /*#__PURE__*/function () {
+         function QAItem(loc, service, itemType, id, props) {
+           _classCallCheck$1(this, QAItem);
 
-                 text = _escape(cap[0]);
+           // 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
 
-                 if (cap[1] === 'www.') {
-                   href = 'http://' + text;
-                 } else {
-                   href = text;
-                 }
-               }
+           this.id = id ? id : "".concat(QAItem.id());
+           this.update(props); // Some QA services have marker icons to differentiate issues
 
-               return {
-                 type: 'link',
-                 raw: cap[0],
-                 text: text,
-                 href: href,
-                 tokens: [{
-                   type: 'text',
-                   raw: text,
-                   text: text
-                 }]
-               };
-             }
+           if (service && typeof service.getIcon === 'function') {
+             this.icon = service.getIcon(itemType);
            }
-         }, {
-           key: "inlineText",
-           value: function inlineText(src, inRawBlock, smartypants) {
-             var cap = this.rules.inline.text.exec(src);
+         }
 
-             if (cap) {
-               var text;
+         _createClass$1(QAItem, [{
+           key: "update",
+           value: function update(props) {
+             var _this = this;
 
-               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]);
-               }
+             // 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
 
-               return {
-                 type: 'text',
-                 raw: cap[0],
-                 text: text
-               };
-             }
+         }], [{
+           key: "id",
+           value: function id() {
+             return this.nextId--;
            }
          }]);
 
-         return Tokenizer;
+         return QAItem;
        }();
+       QAItem.nextId = -1;
 
-       var noopTest$1 = helpers.noopTest,
-           edit$1 = helpers.edit,
-           merge$2 = helpers.merge;
-       /**
-        * Block-Level Grammar
-        */
+       //
+       // 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
+       //
 
-       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|$))+/,
-         list: /^( {0,3})(bull) [\s\S]+?(?:hr|def|\n{2,}(?! )(?! {0,3}bull )\n*|\s*$)/,
-         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*|$)' // (5)
-         + '|</?(tag)(?: +|\\n|/?>)[\\s\\S]*?(?:\\n{2,}|$)' // (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(?! *bull ?)[^\n]*)*/;
-       block.item = edit$1(block.item, 'gm').replace(/bull/g, block.bullet).getRegex();
-       block.listItemStart = edit$1(/^( *)(bull)/).replace('bull', 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
-        */
+       function actionSplit(nodeIds, newWayIds) {
+         // accept single ID for backwards-compatiblity
+         if (typeof nodeIds === 'string') nodeIds = [nodeIds];
 
-       block.normal = merge$2({}, block);
-       /**
-        * GFM Block Grammar
-        */
+         var _wayIDs; // the strategy for picking which way will have a new version and which way is newly created
 
-       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
 
-       });
-       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)
-        */
+         var _keepHistoryOn = 'longest'; // 'longest', 'first'
+         // The IDs of the ways actually created by running this action
 
-       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 _createdWayIDs = [];
 
-       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 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.
 
-         },
-         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)
 
-         },
-         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
-        */
+         function splitArea(nodes, idxA, graph) {
+           var lengths = new Array(nodes.length);
+           var length;
+           var i;
+           var best = 0;
+           var idxB;
 
-       inline.normal = merge$2({}, inline);
-       /**
-        * Pedantic Inline Grammar
-        */
+           function wrap(index) {
+             return utilWrap(index, nodes.length);
+           } // calculate lengths
 
-       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
-        */
 
-       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
-        */
+           length = 0;
 
-       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
-       };
+           for (i = wrap(idxA + 1); i !== idxA; i = wrap(i + 1)) {
+             length += dist(graph, nodes[i], nodes[wrap(i - 1)]);
+             lengths[i] = length;
+           }
 
-       var defaults$2 = defaults.defaults;
-       var block$1 = rules.block,
-           inline$1 = rules.inline;
-       var repeatString$1 = helpers.repeatString;
-       /**
-        * smartypants text replacement
-        */
+           length = 0;
 
-       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
-        */
+           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
 
-       function mangle(text) {
-         var out = '',
-             i,
-             ch;
-         var l = text.length;
 
-         for (i = 0; i < l; i++) {
-           ch = text.charCodeAt(i);
+           for (i = 0; i < nodes.length; i++) {
+             var cost = lengths[i] / dist(graph, nodes[idxA], nodes[i]);
 
-           if (Math.random() > 0.5) {
-             ch = 'x' + ch.toString(16);
+             if (cost > best) {
+               idxB = i;
+               best = cost;
+             }
            }
 
-           out += '&#' + ch + ';';
+           return idxB;
          }
 
-         return out;
-       }
-       /**
-        * Block Lexer
-        */
+         function totalLengthBetweenNodes(graph, nodes) {
+           var totalLength = 0;
 
+           for (var i = 0; i < nodes.length - 1; i++) {
+             totalLength += dist(graph, nodes[i], nodes[i + 1]);
+           }
 
-       var Lexer_1 = /*#__PURE__*/function () {
-         function Lexer(options) {
-           _classCallCheck(this, Lexer);
+           return totalLength;
+         }
 
-           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
-           };
+         function split(graph, nodeId, wayA, newWayId) {
+           var wayB = osmWay({
+             id: newWayId,
+             tags: wayA.tags
+           }); // `wayB` is the NEW way
 
-           if (this.options.pedantic) {
-             rules.block = block$1.pedantic;
-             rules.inline = inline$1.pedantic;
-           } else if (this.options.gfm) {
-             rules.block = block$1.gfm;
+           var origNodes = wayA.nodes.slice();
+           var nodesA;
+           var nodesB;
+           var isArea = wayA.isArea();
+           var isOuter = osmIsOldMultipolygonOuterMember(wayA, graph);
 
-             if (this.options.breaks) {
-               rules.inline = inline$1.breaks;
+           if (wayA.isClosed()) {
+             var nodes = wayA.nodes.slice(0, -1);
+             var idxA = nodes.indexOf(nodeId);
+             var idxB = splitArea(nodes, idxA, graph);
+
+             if (idxB < idxA) {
+               nodesA = nodes.slice(idxA).concat(nodes.slice(0, idxB + 1));
+               nodesB = nodes.slice(idxB, idxA + 1);
              } else {
-               rules.inline = inline$1.gfm;
+               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);
            }
 
-           this.tokenizer.rules = rules;
-         }
-         /**
-          * Expose Rules
-          */
-
-
-         _createClass(Lexer, [{
-           key: "lex",
+           var lengthA = totalLengthBetweenNodes(graph, nodesA);
+           var lengthB = totalLengthBetweenNodes(graph, nodesB);
 
-           /**
-            * 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;
+           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
+             });
            }
-           /**
-            * Lexing
-            */
-
-         }, {
-           key: "blockTokens",
-           value: function blockTokens(src) {
-             var tokens = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : [];
-             var top = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : true;
-             src = src.replace(/^ +$/gm, '');
-             var token, i, l, lastToken;
 
-             while (src) {
-               // newline
-               if (token = this.tokenizer.space(src)) {
-                 src = src.substring(token.raw.length);
+           if (wayA.tags.step_count) {
+             // divide up the the step count proportionally between the two ways
+             var stepCount = parseFloat(wayA.tags.step_count);
 
-                 if (token.type) {
-                   tokens.push(token);
-                 }
+             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
+               });
+             }
+           }
 
-                 continue;
-               } // code
+           graph = graph.replace(wayA);
+           graph = graph.replace(wayB);
+           graph.parentRelations(wayA).forEach(function (relation) {
+             var member; // Turn restrictions - make sure:
+             // 1. Splitting a FROM/TO way - only `wayA` OR `wayB` remains in relation
+             //    (whichever one is connected to the VIA node/ways)
+             // 2. Splitting a VIA way - `wayB` remains in relation as a VIA way
 
+             if (relation.hasFromViaTo()) {
+               var f = relation.memberByRole('from');
+               var v = relation.membersByRole('via');
+               var t = relation.memberByRole('to');
+               var i; // 1. split a FROM/TO
 
-               if (token = this.tokenizer.code(src, tokens)) {
-                 src = src.substring(token.raw.length);
+               if (f.id === wayA.id || t.id === wayA.id) {
+                 var keepB = false;
 
-                 if (token.type) {
-                   tokens.push(token);
+                 if (v.length === 1 && v[0].type === 'node') {
+                   // check via node
+                   keepB = wayB.contains(v[0].id);
                  } else {
-                   lastToken = tokens[tokens.length - 1];
-                   lastToken.raw += '\n' + token.raw;
-                   lastToken.text += '\n' + token.text;
-                 }
+                   // check via way(s)
+                   for (i = 0; i < v.length; i++) {
+                     if (v[i].type === 'way') {
+                       var wayVia = graph.hasEntity(v[i].id);
 
-                 continue;
-               } // fences
+                       if (wayVia && utilArrayIntersection(wayB.nodes, wayVia.nodes).length) {
+                         keepB = true;
+                         break;
+                       }
+                     }
+                   }
+                 }
 
+                 if (keepB) {
+                   relation = relation.replaceMember(wayA, wayB);
+                   graph = graph.replace(relation);
+                 } // 2. split a VIA
 
-               if (token = this.tokenizer.fences(src)) {
-                 src = src.substring(token.raw.length);
-                 tokens.push(token);
-                 continue;
-               } // heading
+               } else {
+                 for (i = 0; i < v.length; i++) {
+                   if (v[i].type === 'way' && v[i].id === wayA.id) {
+                     member = {
+                       id: wayB.id,
+                       type: 'way',
+                       role: 'via'
+                     };
+                     graph = actionAddMember(relation.id, member, v[i].index + 1)(graph);
+                     break;
+                   }
+                 }
+               } // All other relations (Routes, Multipolygons, etc):
+               // 1. Both `wayA` and `wayB` remain in the relation
+               // 2. But must be inserted as a pair (see `actionAddMember` for details)
 
+             } else {
+               if (relation === isOuter) {
+                 graph = graph.replace(relation.mergeTags(wayA.tags));
+                 graph = graph.replace(wayA.update({
+                   tags: {}
+                 }));
+                 graph = graph.replace(wayB.update({
+                   tags: {}
+                 }));
+               }
 
-               if (token = this.tokenizer.heading(src)) {
-                 src = src.substring(token.raw.length);
-                 tokens.push(token);
-                 continue;
-               } // table no leading pipe (gfm)
+               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 (token = this.tokenizer.nptable(src)) {
-                 src = src.substring(token.raw.length);
-                 tokens.push(token);
-                 continue;
-               } // hr
+           _createdWayIDs.push(wayB.id);
 
+           return graph;
+         }
 
-               if (token = this.tokenizer.hr(src)) {
-                 src = src.substring(token.raw.length);
-                 tokens.push(token);
-                 continue;
-               } // blockquote
+         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);
 
-               if (token = this.tokenizer.blockquote(src)) {
-                 src = src.substring(token.raw.length);
-                 token.tokens = this.blockTokens(token.text, [], top);
-                 tokens.push(token);
-                 continue;
-               } // list
+             for (var j = 0; j < candidates.length; j++) {
+               graph = split(graph, nodeId, candidates[j], newWayIds && newWayIds[newWayIndex]);
+               newWayIndex += 1;
+             }
+           }
 
+           return graph;
+         };
 
-               if (token = this.tokenizer.list(src)) {
-                 src = src.substring(token.raw.length);
-                 l = token.items.length;
+         action.getCreatedWayIDs = function () {
+           return _createdWayIDs;
+         };
 
-                 for (i = 0; i < l; i++) {
-                   token.items[i].tokens = this.blockTokens(token.items[i].text, [], false);
-                 }
+         action.waysForNode = function (nodeId, graph) {
+           var node = graph.entity(nodeId);
+           var splittableParents = graph.parentWays(node).filter(isSplittable);
 
-                 tokens.push(token);
-                 continue;
-               } // html
+           if (!_wayIDs) {
+             // If the ways to split aren't specified, only split the lines.
+             // If there are no lines to split, split the areas.
+             var hasLine = splittableParents.some(function (parent) {
+               return parent.geometry(graph) === 'line';
+             });
 
+             if (hasLine) {
+               return splittableParents.filter(function (parent) {
+                 return parent.geometry(graph) === 'line';
+               });
+             }
+           }
 
-               if (token = this.tokenizer.html(src)) {
-                 src = src.substring(token.raw.length);
-                 tokens.push(token);
-                 continue;
-               } // def
+           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...
 
-               if (top && (token = this.tokenizer.def(src))) {
-                 src = src.substring(token.raw.length);
+             if (parent.isClosed()) return true; // otherwise, we can't split nodes at their endpoints.
 
-                 if (!this.tokens.links[token.tag]) {
-                   this.tokens.links[token.tag] = {
-                     href: token.href,
-                     title: token.title
-                   };
-                 }
+             for (var i = 1; i < parent.nodes.length - 1; i++) {
+               if (parent.nodes[i] === nodeId) return true;
+             }
 
-                 continue;
-               } // table (gfm)
+             return false;
+           }
+         };
 
+         action.ways = function (graph) {
+           return utilArrayUniq([].concat.apply([], nodeIds.map(function (nodeId) {
+             return action.waysForNode(nodeId, graph);
+           })));
+         };
 
-               if (token = this.tokenizer.table(src)) {
-                 src = src.substring(token.raw.length);
-                 tokens.push(token);
-                 continue;
-               } // lheading
+         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';
+             }
+           }
+         };
 
-               if (token = this.tokenizer.lheading(src)) {
-                 src = src.substring(token.raw.length);
-                 tokens.push(token);
-                 continue;
-               } // top-level paragraph
+         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;
+         };
 
-               if (top && (token = this.tokenizer.paragraph(src))) {
-                 src = src.substring(token.raw.length);
-                 tokens.push(token);
-                 continue;
-               } // text
+         return action;
+       }
 
+       function coreGraph(other, mutable) {
+         if (!(this instanceof coreGraph)) return new coreGraph(other, mutable);
 
-               if (token = this.tokenizer.text(src, tokens)) {
-                 src = src.substring(token.raw.length);
+         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 (token.type) {
-                   tokens.push(token);
-                 } else {
-                   lastToken = tokens[tokens.length - 1];
-                   lastToken.raw += '\n' + token.raw;
-                   lastToken.text += '\n' + token.text;
-                 }
+         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
 
-                 continue;
-               }
+           if (!entity) {
+             entity = this.entities.__proto__[id]; // eslint-disable-line no-proto
+           }
 
-               if (src) {
-                 var errMsg = 'Infinite loop on byte: ' + src.charCodeAt(0);
+           if (!entity) {
+             throw new Error('entity ' + id + ' not found');
+           }
 
-                 if (this.options.silent) {
-                   console.error(errMsg);
-                   break;
-                 } else {
-                   throw new Error(errMsg);
-                 }
-               }
-             }
+           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] = {});
 
-             return tokens;
+           if (transients[key] !== undefined) {
+             return transients[key];
            }
-         }, {
-           key: "inline",
-           value: function inline(tokens) {
-             var i, j, k, l2, row, token;
-             var l = tokens.length;
 
-             for (i = 0; i < l; i++) {
-               token = tokens[i];
-
-               switch (token.type) {
-                 case 'paragraph':
-                 case 'text':
-                 case 'heading':
-                   {
-                     token.tokens = [];
-                     this.inlineTokens(token.text, token.tokens);
-                     break;
-                   }
+           transients[key] = fn.call(entity);
+           return transients[key];
+         },
+         parentWays: function parentWays(entity) {
+           var parents = this._parentWays[entity.id];
+           var result = [];
 
-                 case 'table':
-                   {
-                     token.tokens = {
-                       header: [],
-                       cells: []
-                     }; // header
+           if (parents) {
+             parents.forEach(function (id) {
+               result.push(this.entity(id));
+             }, this);
+           }
 
-                     l2 = token.header.length;
+           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 = [];
 
-                     for (j = 0; j < l2; j++) {
-                       token.tokens.header[j] = [];
-                       this.inlineTokens(token.header[j], token.tokens.header[j]);
-                     } // cells
+           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 = [];
 
-                     l2 = token.cells.length;
+           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 (j = 0; j < l2; j++) {
-                       row = token.cells[j];
-                       token.tokens.cells[j] = [];
+           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 (k = 0; k < row.length; k++) {
-                         token.tokens.cells[j][k] = [];
-                         this.inlineTokens(row[k], token.tokens.cells[j][k]);
-                       }
-                     }
+             base.entities[entity.id] = entity;
 
-                     break;
-                   }
+             this._updateCalculated(undefined, entity, base.parentWays, base.parentRels); // Restore provisionally-deleted nodes that are discovered to have an extant parent
 
-                 case 'blockquote':
-                   {
-                     this.inline(token.tokens);
-                     break;
-                   }
 
-                 case 'list':
-                   {
-                     l2 = token.items.length;
+             if (entity.type === 'way') {
+               for (j = 0; j < entity.nodes.length; j++) {
+                 id = entity.nodes[j];
 
-                     for (j = 0; j < l2; j++) {
-                       this.inline(token.items[j].tokens);
-                     }
+                 for (k = 1; k < stack.length; k++) {
+                   var ents = stack[k].entities;
 
-                     break;
+                   if (ents.hasOwnProperty(id) && ents[id] === undefined) {
+                     delete ents[id];
                    }
+                 }
                }
              }
-
-             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);
 
-               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);
-                   }
+           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);
                  }
-               }
-             } // Mask out other blocks
-
-
-             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);
+               }, 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;
 
-             while (src) {
-               // escape
-               if (token = this.tokenizer.escape(src)) {
-                 src = src.substring(token.raw.length);
-                 tokens.push(token);
-                 continue;
-               } // tag
-
-
-               if (token = this.tokenizer.tag(src, inLink, inRawBlock)) {
-                 src = src.substring(token.raw.length);
-                 inLink = token.inLink;
-                 inRawBlock = token.inRawBlock;
-                 tokens.push(token);
-                 continue;
-               } // link
-
-
-               if (token = this.tokenizer.link(src)) {
-                 src = src.substring(token.raw.length);
+           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;
+             }
 
-                 if (token.type === 'link') {
-                   token.tokens = this.inlineTokens(token.text, [], true, inRawBlock);
-                 }
+             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);
+             }
 
-                 tokens.push(token);
-                 continue;
-               } // reflink, nolink
+             for (i = 0; i < added.length; i++) {
+               // make a copy of prototype property, store as own property, and update..
+               parentWays[added[i]] = new Set(parentWays[added[i]]);
+               parentWays[added[i]].add(entity.id);
+             }
+           } else if (type === 'relation') {
+             // Update parentRels
+             // diff only on the IDs since the same entity can be a member multiple times with different roles
+             var oldentityMemberIDs = oldentity ? oldentity.members.map(function (m) {
+               return m.id;
+             }) : [];
+             var entityMemberIDs = entity ? entity.members.map(function (m) {
+               return m.id;
+             }) : [];
 
+             if (oldentity && entity) {
+               removed = utilArrayDifference(oldentityMemberIDs, entityMemberIDs);
+               added = utilArrayDifference(entityMemberIDs, oldentityMemberIDs);
+             } else if (oldentity) {
+               removed = oldentityMemberIDs;
+               added = [];
+             } else if (entity) {
+               removed = [];
+               added = entityMemberIDs;
+             }
 
-               if (token = this.tokenizer.reflink(src, this.tokens.links)) {
-                 src = src.substring(token.raw.length);
+             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);
+             }
 
-                 if (token.type === 'link') {
-                   token.tokens = this.inlineTokens(token.text, [], true, inRawBlock);
-                 }
+             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);
 
-                 tokens.push(token);
-                 continue;
-               } // strong
+             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);
 
-               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
+             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);
+           }
 
-               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 (this.frozen) graph.frozen = true;
+           return graph;
+         },
+         // Obliterates any existing entities
+         load: function load(entities) {
+           var base = this.base();
+           this.entities = Object.create(base.entities);
 
+           for (var i in entities) {
+             this.entities[i] = entities[i];
 
-               if (token = this.tokenizer.codespan(src)) {
-                 src = src.substring(token.raw.length);
-                 tokens.push(token);
-                 continue;
-               } // br
+             this._updateCalculated(base.entities[i], this.entities[i]);
+           }
 
+           return this;
+         }
+       };
 
-               if (token = this.tokenizer.br(src)) {
-                 src = src.substring(token.raw.length);
-                 tokens.push(token);
-                 continue;
-               } // del (gfm)
+       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
 
-               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
+         var vgraph = coreGraph(); // virtual graph
 
+         var i, j, k;
 
-               if (token = this.tokenizer.autolink(src, mangle)) {
-                 src = src.substring(token.raw.length);
-                 tokens.push(token);
-                 continue;
-               } // url (gfm)
+         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];
+         }
 
-               if (!inLink && (token = this.tokenizer.url(src, mangle))) {
-                 src = src.substring(token.raw.length);
-                 tokens.push(token);
-                 continue;
-               } // text
+         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..
 
-               if (token = this.tokenizer.inlineText(src, inRawBlock, smartypants)) {
-                 src = src.substring(token.raw.length);
-                 prevChar = token.raw.slice(-1);
-                 tokens.push(token);
-                 continue;
-               }
+         while (checkVertices.length) {
+           vertex = checkVertices.pop(); // check this vertex for parent ways that are roads
 
-               if (src) {
-                 var errMsg = 'Infinite loop on byte: ' + src.charCodeAt(0);
+           checkWays = graph.parentWays(vertex);
+           var hasWays = false;
 
-                 if (this.options.silent) {
-                   console.error(errMsg);
-                   break;
-                 } else {
-                   throw new Error(errMsg);
-                 }
-               }
-             }
+           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
 
-             return tokens;
-           }
-         }], [{
-           key: "lex",
+             hasWays = true; // check the way's children for more key vertices
 
-           /**
-            * Static Lex Method
-            */
-           value: function lex(src, options) {
-             var lexer = new Lexer(options);
-             return lexer.lex(src);
-           }
-           /**
-            * Static Lex Inline Method
-            */
+             nodes = utilArrayUniq(graph.childNodes(way));
 
-         }, {
-           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
-             };
-           }
-         }]);
+             for (j = 0; j < nodes.length; j++) {
+               node = nodes[j];
+               if (node === vertex) continue; // same thing
 
-         return Lexer;
-       }();
+               if (vertices.indexOf(node) !== -1) continue; // seen it already
 
-       var defaults$3 = defaults.defaults;
-       var cleanUrl$1 = helpers.cleanUrl,
-           escape$2 = helpers.escape;
-       /**
-        * Renderer
-        */
+               if (geoSphericalDistance(node.loc, startNode.loc) > maxDistance) continue; // too far from start
+               // a key vertex will have parents that are also roads
 
-       var Renderer_1 = /*#__PURE__*/function () {
-         function Renderer(options) {
-           _classCallCheck(this, Renderer);
+               var hasParents = false;
+               parents = graph.parentWays(node);
 
-           this.options = options || defaults$3;
-         }
+               for (k = 0; k < parents.length; k++) {
+                 parent = parents[k];
+                 if (parent === way) continue; // same thing
 
-         _createClass(Renderer, [{
-           key: "code",
-           value: function code(_code, infostring, escaped) {
-             var lang = (infostring || '').match(/\S*/)[0];
+                 if (ways.indexOf(parent) !== -1) continue; // seen it already
 
-             if (this.options.highlight) {
-               var out = this.options.highlight(_code, lang);
+                 if (!isRoad(parent)) continue; // not a road
 
-               if (out != null && out !== _code) {
-                 escaped = true;
-                 _code = out;
+                 hasParents = true;
+                 break;
                }
-             }
 
-             if (!lang) {
-               return '<pre><code>' + (escaped ? _code : escape$2(_code, true)) + '</code></pre>\n';
+               if (hasParents) {
+                 checkVertices.push(node);
+               }
              }
-
-             return '<pre><code class="' + this.options.langPrefix + escape$2(lang, true) + '">' + (escaped ? _code : escape$2(_code, true)) + '</code></pre>\n';
-           }
-         }, {
-           key: "blockquote",
-           value: function blockquote(quote) {
-             return '<blockquote>\n' + quote + '</blockquote>\n';
-           }
-         }, {
-           key: "html",
-           value: function html(_html) {
-             return _html;
            }
-         }, {
-           key: "heading",
-           value: function heading(text, level, raw, slugger) {
-             if (this.options.headerIds) {
-               return '<h' + level + ' id="' + this.options.headerPrefix + slugger.slug(raw) + '">' + text + '</h' + level + '>\n';
-             } // ignore IDs
-
 
-             return '<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';
+           if (hasWays) {
+             vertices.push(vertex);
            }
-         }, {
-           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>';
-           }
-         }, {
-           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);
+         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
 
-             if (href === null) {
-               return text;
+         ways.forEach(function (way) {
+           graph.childNodes(way).forEach(function (node) {
+             vgraph = vgraph.replace(node);
+           });
+           vgraph = vgraph.replace(way);
+           graph.parentRelations(way).forEach(function (relation) {
+             if (relation.isRestriction()) {
+               if (relation.isValidRestriction(graph)) {
+                 vgraph = vgraph.replace(relation);
+               } else if (relation.isComplete(graph)) {
+                 actions.push(actionDeleteRelation(relation.id));
+               }
              }
+           });
+         }); // STEP 3:  Force all oneways to be drawn in the forward direction
 
-             var out = '<a href="' + escape$2(href) + '"';
-
-             if (title) {
-               out += ' title="' + title + '"';
-             }
+         ways.forEach(function (w) {
+           var way = vgraph.entity(w.id);
 
-             out += '>' + text + '</a>';
-             return out;
+           if (way.tags.oneway === '-1') {
+             var action = actionReverse(way.id, {
+               reverseOneway: true
+             });
+             actions.push(action);
+             vgraph = action(vgraph);
            }
-         }, {
-           key: "image",
-           value: function image(href, title, text) {
-             href = cleanUrl$1(this.options.sanitize, this.options.baseUrl, href);
-
-             if (href === null) {
-               return text;
-             }
-
-             var out = '<img src="' + href + '" alt="' + text + '"';
+         }); // STEP 4:  Split ways on key vertices
 
-             if (title) {
-               out += ' title="' + title + '"';
-             }
+         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');
 
-             out += this.options.xhtml ? '/>' : '>';
-             return out;
-           }
-         }, {
-           key: "text",
-           value: function text(_text) {
-             return _text;
+           if (!splitAll.disabled(vgraph)) {
+             splitAll.ways(vgraph).forEach(function (way) {
+               var splitOne = actionSplit([v.id]).limitWays([way.id]).keepHistoryOn('first');
+               actions.push(splitOne);
+               vgraph = splitOne(vgraph);
+             });
            }
-         }]);
-
-         return Renderer;
-       }();
+         }); // 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
 
-       /**
-        * TextRenderer
-        * returns only the textual part of the token
-        */
-       var TextRenderer_1 = /*#__PURE__*/function () {
-         function TextRenderer() {
-           _classCallCheck(this, TextRenderer);
-         }
+         osmEntity.id.next.way = origCount; // STEP 5:  Update arrays to point to vgraph entities
 
-         _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 '';
-           }
-         }]);
+         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.
 
-         return TextRenderer;
-       }();
+         function withMetadata(way, vertexIds) {
+           var __oneWay = way.isOneWay(); // which affixes are key vertices?
 
-       /**
-        * Slugger generates header id
-        */
-       var Slugger_1 = /*#__PURE__*/function () {
-         function Slugger() {
-           _classCallCheck(this, Slugger);
 
-           this.seen = {};
+           var __first = vertexIds.indexOf(way.first()) !== -1;
+
+           var __last = vertexIds.indexOf(way.last()) !== -1; // what roles is this way eligible for?
+
+
+           var __via = __first && __last;
+
+           var __from = __first && !__oneWay || __last;
+
+           var __to = __first || __last && !__oneWay;
+
+           return way.update({
+             __first: __first,
+             __last: __last,
+             __from: __from,
+             __via: __via,
+             __to: __to,
+             __oneWay: __oneWay
+           });
          }
 
-         _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
-            */
+         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
 
-         }, {
-           key: "getNextSafeSlug",
-           value: function getNextSafeSlug(originalSlug, isDryRun) {
-             var slug = originalSlug;
-             var occurenceAccumulator = 0;
+         var keepGoing;
+         var removeWayIds = [];
+         var removeVertexIds = [];
 
-             if (this.seen.hasOwnProperty(slug)) {
-               occurenceAccumulator = this.seen[originalSlug];
+         do {
+           keepGoing = false;
+           checkVertices = vertexIds.slice();
 
-               do {
-                 occurenceAccumulator++;
-                 slug = originalSlug + '-' + occurenceAccumulator;
-               } while (this.seen.hasOwnProperty(slug));
-             }
+           for (i = 0; i < checkVertices.length; i++) {
+             var vertexId = checkVertices[i];
+             vertex = vgraph.hasEntity(vertexId);
 
-             if (!isDryRun) {
-               this.seen[originalSlug] = occurenceAccumulator;
-               this.seen[slug] = 0;
+             if (!vertex) {
+               if (vertexIds.indexOf(vertexId) !== -1) {
+                 vertexIds.splice(vertexIds.indexOf(vertexId), 1); // stop checking this one
+               }
+
+               removeVertexIds.push(vertexId);
+               continue;
              }
 
-             return slug;
-           }
-           /**
-            * Convert string to unique id
-            * @param {object} options
-            * @param {boolean} options.dryrun Generates the next unique slug without updating the internal accumulator.
-            */
+             parents = vgraph.parentWays(vertex);
 
-         }, {
-           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 (parents.length < 3) {
+               if (vertexIds.indexOf(vertexId) !== -1) {
+                 vertexIds.splice(vertexIds.indexOf(vertexId), 1); // stop checking this one
+               }
+             }
 
-         return Slugger;
-       }();
+             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;
 
-       var defaults$4 = defaults.defaults;
-       var unescape$2 = helpers.unescape;
-       /**
-        * Parsing & Compiling
-        */
+               if (aIsLeaf && !bIsLeaf) {
+                 leaf = a;
+                 survivor = b;
+               } else if (!aIsLeaf && bIsLeaf) {
+                 leaf = b;
+                 survivor = a;
+               }
 
-       var Parser_1 = /*#__PURE__*/function () {
-         function Parser(options) {
-           _classCallCheck(this, Parser);
+               if (leaf && survivor) {
+                 survivor = withMetadata(survivor, vertexIds); // update survivor 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
-          */
+                 vgraph = vgraph.replace(survivor).remove(leaf); // update graph
 
+                 removeWayIds.push(leaf.id);
+                 keepGoing = true;
+               }
+             }
 
-         _createClass(Parser, [{
-           key: "parse",
+             parents = vgraph.parentWays(vertex);
 
-           /**
-            * 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 (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
+               }
 
-             for (i = 0; i < l; i++) {
-               token = tokens[i];
+               removeVertexIds.push(vertexId);
+               keepGoing = true;
+             }
 
-               switch (token.type) {
-                 case 'space':
-                   {
-                     continue;
-                   }
+             if (parents.length < 1) {
+               // vertex is no longer attached to anything
+               vgraph = vgraph.remove(vertex);
+             }
+           }
+         } while (keepGoing);
 
-                 case 'hr':
-                   {
-                     out += this.renderer.hr();
-                     continue;
-                   }
+         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..
 
-                 case 'heading':
-                   {
-                     out += this.renderer.heading(this.parseInline(token.tokens), token.depth, unescape$2(this.parseInline(token.tokens, this.textRenderer)), this.slugger);
-                     continue;
-                   }
+         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.
+         //
 
-                 case 'code':
-                   {
-                     out += this.renderer.code(token.text, token.lang, token.escaped);
-                     continue;
-                   }
+         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)
 
-                 case 'table':
-                   {
-                     header = ''; // header
+           var maxPathLength = maxViaWay * 2 + 3;
+           var turns = [];
+           step(start);
+           return turns; // traverse the intersection graph and find all the valid paths
 
-                     cell = '';
-                     l2 = token.header.length;
+           function step(entity, currPath, currRestrictions, matchedRestriction) {
+             currPath = (currPath || []).slice(); // shallow copy
 
-                     for (j = 0; j < l2; j++) {
-                       cell += this.renderer.tablecell(this.parseInline(token.tokens.header[j]), {
-                         header: true,
-                         align: token.align[j]
-                       });
-                     }
+             if (currPath.length >= maxPathLength) return;
+             currPath.push(entity.id);
+             currRestrictions = (currRestrictions || []).slice(); // shallow copy
 
-                     header += this.renderer.tablerow(cell);
-                     body = '';
-                     l2 = token.cells.length;
+             var i, j;
 
-                     for (j = 0; j < l2; j++) {
-                       row = token.tokens.cells[j];
-                       cell = '';
-                       l3 = row.length;
+             if (entity.type === 'node') {
+               var parents = vgraph.parentWays(entity);
+               var nextWays = []; // which ways can we step into?
 
-                       for (k = 0; k < l3; k++) {
-                         cell += this.renderer.tablecell(this.parseInline(row[k]), {
-                           header: false,
-                           align: token.align[k]
-                         });
-                       }
+               for (i = 0; i < parents.length; i++) {
+                 var way = parents[i]; // if next way is a oneway incoming to this vertex, skip
 
-                       body += this.renderer.tablerow(cell);
-                     }
+                 if (way.__oneWay && way.nodes[0] !== entity.id) continue; // if we have seen it before (allowing for an initial u-turn), skip
 
-                     out += this.renderer.table(header, body);
-                     continue;
-                   }
+                 if (currPath.indexOf(way.id) !== -1 && currPath.length >= 3) continue; // Check all "current" restrictions (where we've already walked the `FROM`)
 
-                 case 'blockquote':
-                   {
-                     body = this.parse(token.tokens);
-                     out += this.renderer.blockquote(body);
-                     continue;
-                   }
+                 var restrict = null;
 
-                 case 'list':
-                   {
-                     ordered = token.ordered;
-                     start = token.start;
-                     loose = token.loose;
-                     l2 = token.items.length;
-                     body = '';
+                 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?
 
-                     for (j = 0; j < l2; j++) {
-                       item = token.items[j];
-                       checked = item.checked;
-                       task = item.task;
-                       itemBody = '';
+                   var matchesFrom = f.id === fromWayId;
+                   var matchesViaTo = false;
+                   var isAlongOnlyPath = false;
 
-                       if (item.task) {
-                         checkbox = this.renderer.checkbox(checked);
+                   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 (loose) {
-                           if (item.tokens.length > 0 && item.tokens[0].type === 'text') {
-                             item.tokens[0].text = checkbox + ' ' + item.tokens[0].text;
+                       for (k = 2; k < currPath.length; k += 2) {
+                         // k = 2 skips FROM
+                         pathVias.push(currPath[k]); // (path goes way-node-way...)
+                       }
 
-                             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 restrictionVias = [];
+
+                       for (k = 0; k < v.length; k++) {
+                         if (v[k].type === 'way') {
+                           restrictionVias.push(v[k].id);
                          }
                        }
 
-                       itemBody += this.parse(item.tokens, loose);
-                       body += this.renderer.listitem(itemBody, task, checked);
+                       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;
+                       }
                      }
-
-                     out += this.renderer.list(body, ordered, start);
-                     continue;
                    }
 
-                 case 'html':
-                   {
-                     // TODO parse inline content if parameter markdown=1
-                     out += this.renderer.html(token.text);
-                     continue;
-                   }
+                   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)
 
-                 case 'paragraph':
-                   {
-                     out += this.renderer.paragraph(this.parseInline(token.tokens));
-                     continue;
-                   }
 
-                 case 'text':
-                   {
-                     body = token.tokens ? this.parseInline(token.tokens) : token.text;
+                   if (restrict && restrict.direct) break;
+                 }
 
-                     while (i + 1 < l && tokens[i + 1].type === 'text') {
-                       token = tokens[++i];
-                       body += '\n' + (token.tokens ? this.parseInline(token.tokens) : token.text);
-                     }
+                 nextWays.push({
+                   way: way,
+                   restrict: restrict
+                 });
+               }
 
-                     out += top ? this.renderer.paragraph(body) : body;
-                     continue;
+               nextWays.forEach(function (nextWay) {
+                 step(nextWay.way, currPath, currRestrictions, nextWay.restrict);
+               });
+             } else {
+               // entity.type === 'way'
+               if (currPath.length >= 3) {
+                 // this is a "complete" path..
+                 var turnPath = currPath.slice(); // shallow copy
+                 // an indirect restriction - only include the partial path (starting at FROM)
+
+                 if (matchedRestriction && matchedRestriction.direct === false) {
+                   for (i = 0; i < turnPath.length; i++) {
+                     if (turnPath[i] === matchedRestriction.from) {
+                       turnPath = turnPath.slice(i);
+                       break;
+                     }
                    }
+                 }
 
-                 default:
-                   {
-                     var errMsg = 'Token with "' + token.type + '" type was not found.';
+                 var turn = pathToTurn(turnPath);
 
-                     if (this.options.silent) {
-                       console.error(errMsg);
-                       return;
-                     } else {
-                       throw new Error(errMsg);
-                     }
+                 if (turn) {
+                   if (matchedRestriction) {
+                     turn.restrictionID = matchedRestriction.id;
+                     turn.no = matchedRestriction.no;
+                     turn.only = matchedRestriction.only;
+                     turn.direct = matchedRestriction.direct;
                    }
+
+                   turns.push(osmTurn(turn));
+                 }
+
+                 if (currPath[0] === currPath[2]) return; // if we made a u-turn - stop here
                }
-             }
 
-             return out;
-           }
-           /**
-            * Parse Inline Tokens
-            */
+               if (matchedRestriction && matchedRestriction.end) return; // don't advance any further
+               // which nodes can we step into?
 
-         }, {
-           key: "parseInline",
-           value: function parseInline(tokens, renderer) {
-             renderer = renderer || this.renderer;
-             var out = '',
-                 i,
-                 token;
-             var l = tokens.length;
+               var n1 = vgraph.entity(entity.first());
+               var n2 = vgraph.entity(entity.last());
+               var dist = geoSphericalDistance(n1.loc, n2.loc);
+               var nextNodes = [];
 
-             for (i = 0; i < l; i++) {
-               token = tokens[i];
+               if (currPath.length > 1) {
+                 if (dist > maxDistance) return; // the next node is too far
 
-               switch (token.type) {
-                 case 'escape':
-                   {
-                     out += renderer.text(token.text);
-                     break;
-                   }
+                 if (!entity.__via) return; // this way is a leaf / can't be a via
+               }
 
-                 case 'html':
-                   {
-                     out += renderer.html(token.text);
-                     break;
-                   }
+               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
+               }
 
-                 case 'link':
-                   {
-                     out += renderer.link(token.href, token.title, this.parseInline(token.tokens, renderer));
-                     break;
-                   }
+               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
+               }
 
-                 case 'image':
-                   {
-                     out += renderer.image(token.href, token.title, token.text);
-                     break;
-                   }
+               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
 
-                 case 'strong':
-                   {
-                     out += renderer.strong(this.parseInline(token.tokens, renderer));
-                     break;
-                   }
+                   var isOnlyVia = false;
+                   var v = r.membersByRole('via');
 
-                 case 'em':
-                   {
-                     out += renderer.em(this.parseInline(token.tokens, renderer));
-                     break;
-                   }
+                   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);
 
-                 case 'codespan':
-                   {
-                     out += renderer.codespan(token.text);
-                     break;
+                       if (viaWay.first() === nextNode.id || viaWay.last() === nextNode.id) {
+                         isOnlyVia = true;
+                         break;
+                       }
+                     }
                    }
 
-                 case 'br':
-                   {
-                     out += renderer.br();
-                     break;
-                   }
+                   return isOnlyVia;
+                 });
+                 step(nextNode, currPath, currRestrictions.concat(fromRestrictions), false);
+               });
+             }
+           } // assumes path is alternating way-node-way of odd length
 
-                 case 'del':
-                   {
-                     out += renderer.del(this.parseInline(token.tokens, renderer));
-                     break;
-                   }
 
-                 case 'text':
-                   {
-                     out += renderer.text(token.text);
-                     break;
-                   }
+           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];
 
-                 default:
-                   {
-                     var errMsg = 'Token with "' + token.type + '" type was not found.';
+             if (path.length === 3 && fromWayId === toWayId) {
+               // u turn
+               var way = vgraph.entity(fromWayId);
+               if (way.__oneWay) return null;
+               isUturn = true;
+               viaNodeId = fromVertexId = toVertexId = path[1];
+               fromNodeId = toNodeId = adjacentNode(fromWayId, viaNodeId);
+             } else {
+               isUturn = false;
+               fromVertexId = path[1];
+               fromNodeId = adjacentNode(fromWayId, fromVertexId);
+               toVertexId = path[path.length - 2];
+               toNodeId = adjacentNode(toWayId, toVertexId);
 
-                     if (this.options.silent) {
-                       console.error(errMsg);
-                       return;
-                     } else {
-                       throw new Error(errMsg);
-                     }
-                   }
+               if (path.length === 3) {
+                 viaNodeId = path[1];
+               } else {
+                 viaWayIds = path.filter(function (entityId) {
+                   return entityId[0] === 'w';
+                 });
+                 viaWayIds = viaWayIds.slice(1, viaWayIds.length - 1); // remove first, last
                }
              }
 
-             return out;
-           }
-         }], [{
-           key: "parse",
-           value: function parse(tokens, options) {
-             var parser = new Parser(options);
-             return parser.parse(tokens);
-           }
-           /**
-            * Static Parse Inline Method
-            */
+             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
+             };
 
-         }, {
-           key: "parseInline",
-           value: function parseInline(tokens, options) {
-             var parser = new Parser(options);
-             return parser.parseInline(tokens);
+             function adjacentNode(wayId, affixId) {
+               var nodes = vgraph.entity(wayId).nodes;
+               return affixId === nodes[0] ? nodes[1] : nodes[nodes.length - 2];
+             }
            }
-         }]);
-
-         return Parser;
-       }();
+         };
 
-       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
-        */
+         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;
 
-       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');
+         while (angle < 0) {
+           angle += 360;
          }
 
-         if (typeof src !== 'string') {
-           throw new Error('marked(): input parameter is of type ' + Object.prototype.toString.call(src) + ', string expected');
+         if (fromNode === toNode) {
+           return 'no_u_turn';
          }
 
-         if (typeof opt === 'function') {
-           callback = opt;
-           opt = null;
+         if ((angle < 23 || angle > 336) && fromOneWay && toOneWay) {
+           return 'no_u_turn'; // wider tolerance for u-turn if both ways are oneway
          }
 
-         opt = merge$3({}, marked.defaults, opt || {});
-         checkSanitizeDeprecation$1(opt);
+         if ((angle < 40 || angle > 319) && fromOneWay && toOneWay && turn.from.vertex !== turn.to.vertex) {
+           return 'no_u_turn'; // even wider tolerance for u-turn if there is a via way (from !== to)
+         }
 
-         if (callback) {
-           var highlight = opt.highlight;
-           var tokens;
+         if (angle < 158) {
+           return 'no_right_turn';
+         }
 
-           try {
-             tokens = Lexer_1.lex(src, opt);
-           } catch (e) {
-             return callback(e);
-           }
+         if (angle > 202) {
+           return 'no_left_turn';
+         }
 
-           var done = function done(err) {
-             var out;
+         return 'no_straight_on';
+       }
 
-             if (!err) {
-               try {
-                 out = Parser_1.parse(tokens, opt);
-               } catch (e) {
-                 err = e;
-               }
+       function actionMergePolygon(ids, newRelationId) {
+         function groupEntities(graph) {
+           var entities = ids.map(function (id) {
+             return graph.entity(id);
+           });
+           var geometryGroups = utilArrayGroupBy(entities, function (entity) {
+             if (entity.type === 'way' && entity.isClosed()) {
+               return 'closedWay';
+             } else if (entity.type === 'relation' && entity.isMultipolygon()) {
+               return 'multipolygon';
+             } else {
+               return 'other';
              }
+           });
+           return Object.assign({
+             closedWay: [],
+             multipolygon: [],
+             other: []
+           }, geometryGroups);
+         }
 
-             opt.highlight = highlight;
-             return err ? callback(err) : callback(null, out);
-           };
-
-           if (!highlight || highlight.length < 3) {
-             return done();
-           }
-
-           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);
-                   }
+         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.
 
-                   if (code != null && code !== token.text) {
-                     token.text = code;
-                     token.escaped = true;
-                   }
+           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.
 
-                   pending--;
+           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
 
-                   if (pending === 0) {
-                     done();
-                   }
-                 });
-               }, 0);
-             }
-           });
+           var members = [];
+           var outer = true;
 
-           if (pending === 0) {
-             done();
+           while (polygons.length) {
+             extractUncontained(polygons);
+             polygons = polygons.filter(isContained);
+             contained = contained.filter(isContained).map(filterContained);
            }
 
-           return;
-         }
-
-         try {
-           var _tokens = Lexer_1.lex(src, opt);
-
-           if (opt.walkTokens) {
-             marked.walkTokens(_tokens, opt.walkTokens);
+           function isContained(d, i) {
+             return contained[i].some(function (val) {
+               return val;
+             });
            }
 
-           return Parser_1.parse(_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$3(e.message + '', true) + '</pre>';
+           function filterContained(d) {
+             return d.filter(isContained);
            }
 
-           throw e;
-         }
-       }
-       /**
-        * Options
-        */
-
-
-       marked.options = marked.setOptions = function (opt) {
-         merge$3(marked.defaults, opt);
-         changeDefaults(marked.defaults);
-         return marked;
-       };
-
-       marked.getDefaults = getDefaults;
-       marked.defaults = defaults$5;
-       /**
-        * Use Extension
-        */
+           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
 
-       marked.use = function (extension) {
-         var opts = merge$3({}, extension);
 
-         if (extension.renderer) {
-           (function () {
-             var renderer = marked.defaults.renderer || new Renderer_1();
+           var relation = entities.multipolygon[0] || osmRelation({
+             id: newRelationId,
+             tags: {
+               type: 'multipolygon'
+             }
+           });
+           entities.multipolygon.slice(1).forEach(function (m) {
+             relation = relation.mergeTags(m.tags);
+             graph = graph.remove(m);
+           });
+           entities.closedWay.forEach(function (way) {
+             function isThisOuter(m) {
+               return m.id === way.id && m.role !== 'inner';
+             }
 
-             var _loop = function _loop(prop) {
-               var prevRenderer = renderer[prop];
+             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'])
+           }));
+         };
 
-               renderer[prop] = function () {
-                 for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
-                   args[_key] = arguments[_key];
-                 }
+         action.disabled = function (graph) {
+           var entities = groupEntities(graph);
 
-                 var ret = extension.renderer[prop].apply(renderer, args);
+           if (entities.other.length > 0 || entities.closedWay.length + entities.multipolygon.length < 2) {
+             return 'not_eligible';
+           }
 
-                 if (ret === false) {
-                   ret = prevRenderer.apply(renderer, args);
-                 }
+           if (!entities.multipolygon.every(function (r) {
+             return r.isComplete(graph);
+           })) {
+             return 'incomplete_relation';
+           }
 
-                 return ret;
-               };
-             };
+           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;
+             });
 
-             for (var prop in extension.renderer) {
-               _loop(prop);
+             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';
+           }
+         };
 
-             opts.renderer = renderer;
-           })();
-         }
-
-         if (extension.tokenizer) {
-           (function () {
-             var tokenizer = marked.defaults.tokenizer || new Tokenizer_1();
+         return action;
+       }
 
-             var _loop2 = function _loop2(prop) {
-               var prevTokenizer = tokenizer[prop];
+       var FORCED$2 = descriptors && fails(function () {
+         // eslint-disable-next-line es/no-object-getownpropertydescriptor -- safe
+         return Object.getOwnPropertyDescriptor(RegExp.prototype, 'flags').get.call({ dotAll: true, sticky: true }) !== 'sy';
+       });
 
-               tokenizer[prop] = function () {
-                 for (var _len2 = arguments.length, args = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
-                   args[_key2] = arguments[_key2];
-                 }
+       // `RegExp.prototype.flags` getter
+       // https://tc39.es/ecma262/#sec-get-regexp.prototype.flags
+       if (FORCED$2) objectDefineProperty.f(RegExp.prototype, 'flags', {
+         configurable: true,
+         get: regexpFlags
+       });
 
-                 var ret = extension.tokenizer[prop].apply(tokenizer, args);
+       var fastDeepEqual = function equal(a, b) {
+         if (a === b) return true;
 
-                 if (ret === false) {
-                   ret = prevTokenizer.apply(tokenizer, args);
-                 }
+         if (a && b && _typeof(a) == 'object' && _typeof(b) == 'object') {
+           if (a.constructor !== b.constructor) return false;
+           var length, i, keys;
 
-                 return ret;
-               };
-             };
+           if (Array.isArray(a)) {
+             length = a.length;
+             if (length != b.length) return false;
 
-             for (var prop in extension.tokenizer) {
-               _loop2(prop);
+             for (i = length; i-- !== 0;) {
+               if (!equal(a[i], b[i])) return false;
              }
 
-             opts.tokenizer = tokenizer;
-           })();
-         }
+             return true;
+           }
 
-         if (extension.walkTokens) {
-           var walkTokens = marked.defaults.walkTokens;
+           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;
 
-           opts.walkTokens = function (token) {
-             extension.walkTokens(token);
+           for (i = length; i-- !== 0;) {
+             if (!Object.prototype.hasOwnProperty.call(b, keys[i])) return false;
+           }
 
-             if (walkTokens) {
-               walkTokens(token);
-             }
-           };
-         }
+           for (i = length; i-- !== 0;) {
+             var key = keys[i];
+             if (!equal(a[key], b[key])) return false;
+           }
 
-         marked.setOptions(opts);
-       };
-       /**
-        * Run callback for every token
-        */
+           return true;
+         } // true if both NaN, false otherwise
 
 
-       marked.walkTokens = function (tokens, callback) {
-         var _iterator = _createForOfIteratorHelper(tokens),
-             _step;
+         return a !== a && b !== b;
+       };
 
-         try {
-           for (_iterator.s(); !(_step = _iterator.n()).done;) {
-             var token = _step.value;
-             callback(token);
+       // 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
 
-             switch (token.type) {
-               case 'table':
-                 {
-                   var _iterator2 = _createForOfIteratorHelper(token.tokens.header),
-                       _step2;
+       function LCS(buffer1, buffer2) {
+         var equivalenceClasses = {};
 
-                   try {
-                     for (_iterator2.s(); !(_step2 = _iterator2.n()).done;) {
-                       var cell = _step2.value;
-                       marked.walkTokens(cell, callback);
-                     }
-                   } catch (err) {
-                     _iterator2.e(err);
-                   } finally {
-                     _iterator2.f();
-                   }
+         for (var j = 0; j < buffer2.length; j++) {
+           var item = buffer2[j];
 
-                   var _iterator3 = _createForOfIteratorHelper(token.tokens.cells),
-                       _step3;
+           if (equivalenceClasses[item]) {
+             equivalenceClasses[item].push(j);
+           } else {
+             equivalenceClasses[item] = [j];
+           }
+         }
 
-                   try {
-                     for (_iterator3.s(); !(_step3 = _iterator3.n()).done;) {
-                       var row = _step3.value;
+         var NULLRESULT = {
+           buffer1index: -1,
+           buffer2index: -1,
+           chain: null
+         };
+         var candidates = [NULLRESULT];
 
-                       var _iterator4 = _createForOfIteratorHelper(row),
-                           _step4;
+         for (var i = 0; i < buffer1.length; i++) {
+           var _item = buffer1[i];
+           var buffer2indices = equivalenceClasses[_item] || [];
+           var r = 0;
+           var c = candidates[0];
 
-                       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();
-                   }
+           for (var jx = 0; jx < buffer2indices.length; jx++) {
+             var _j = buffer2indices[jx];
+             var s = void 0;
 
-                   break;
-                 }
+             for (s = r; s < candidates.length; s++) {
+               if (candidates[s].buffer2index < _j && (s === candidates.length - 1 || candidates[s + 1].buffer2index > _j)) {
+                 break;
+               }
+             }
 
-               case 'list':
-                 {
-                   marked.walkTokens(token.items, callback);
-                   break;
-                 }
+             if (s < candidates.length) {
+               var newCandidate = {
+                 buffer1index: i,
+                 buffer2index: _j,
+                 chain: candidates[s]
+               };
 
-               default:
-                 {
-                   if (token.tokens) {
-                     marked.walkTokens(token.tokens, callback);
-                   }
-                 }
+               if (r === candidates.length) {
+                 candidates.push(c);
+               } else {
+                 candidates[r] = c;
+               }
+
+               r = s + 1;
+               c = newCandidate;
+
+               if (r === candidates.length) {
+                 break; // no point in examining further (j)s
+               }
              }
            }
-         } catch (err) {
-           _iterator.e(err);
-         } finally {
-           _iterator.f();
-         }
-       };
-       /**
-        * Parse Inline
-        */
 
+           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].
 
-       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');
-         }
-
-         if (typeof src !== 'string') {
-           throw new Error('marked.parseInline(): input parameter is of type ' + Object.prototype.toString.call(src) + ', string expected');
-         }
 
-         opt = merge$3({}, marked.defaults, opt || {});
-         checkSanitizeDeprecation$1(opt);
+         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.
 
-         try {
-           var tokens = Lexer_1.lexInline(src, opt);
 
-           if (opt.walkTokens) {
-             marked.walkTokens(tokens, opt.walkTokens);
-           }
+       function diffIndices(buffer1, buffer2) {
+         var lcs = LCS(buffer1, buffer2);
+         var result = [];
+         var tail1 = buffer1.length;
+         var tail2 = buffer2.length;
 
-           return Parser_1.parseInline(tokens, opt);
-         } catch (e) {
-           e.message += '\nPlease report this to https://github.com/markedjs/marked.';
+         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 (opt.silent) {
-             return '<p>An error occurred:</p><pre>' + escape$3(e.message + '', true) + '</pre>';
+           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)
+             });
            }
-
-           throw e;
          }
-       };
-       /**
-        * Expose
-        */
 
+         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)
+       //
 
-       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;
 
-       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
+       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 = [];
 
-       var _cache$2;
+         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])
 
-       function abortRequest$2(controller) {
-         if (controller) {
-           controller.abort();
+           });
          }
-       }
 
-       function abortUnwantedRequests$2(cache, tiles) {
-         Object.keys(cache.inflightTile).forEach(function (k) {
-           var wanted = tiles.find(function (tile) {
-             return k === tile.id;
-           });
+         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 (!wanted) {
-             abortRequest$2(cache.inflightTile[k]);
-             delete cache.inflightTile[k];
+         function advanceTo(endOffset) {
+           if (endOffset > currOffset) {
+             results.push({
+               stable: true,
+               buffer: 'o',
+               bufferStart: currOffset,
+               bufferLength: endOffset - currOffset,
+               bufferContent: o.slice(currOffset, endOffset)
+             });
+             currOffset = endOffset;
            }
-         });
-       }
+         }
 
-       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
+         while (hunks.length) {
+           var hunk = hunks.shift();
+           var regionStart = hunk.oStart;
+           var regionEnd = hunk.oStart + hunk.oLength;
+           var regionHunks = [hunk];
+           advanceTo(regionStart); // Try to pull next overlapping hunk into this region
 
+           while (hunks.length) {
+             var nextHunk = hunks[0];
+             var nextHunkStart = nextHunk.oStart;
+             if (nextHunkStart > regionEnd) break; // no overlap
 
-       function updateRtree$2(item, replace) {
-         _cache$2.rtree.remove(item, function (a, b) {
-           return a.data.id === b.data.id;
-         });
+             regionEnd = Math.max(regionEnd, nextHunkStart + nextHunk.oLength);
+             regionHunks.push(hunks.shift());
+           }
 
-         if (replace) {
-           _cache$2.rtree.insert(item);
-         }
-       } // Issues shouldn't obscure each other
+           if (regionHunks.length === 1) {
+             // Only one hunk touches this region, meaning that there is no conflict here.
+             // Either `a` or `b` is inserting into a region of `o` unchanged by the other.
+             if (hunk.abLength > 0) {
+               var buffer = hunk.ab === 'a' ? a : b;
+               results.push({
+                 stable: true,
+                 buffer: hunk.ab,
+                 bufferStart: hunk.abStart,
+                 bufferLength: hunk.abLength,
+                 bufferContent: buffer.slice(hunk.abStart, hunk.abStart + hunk.abLength)
+               });
+             }
+           } else {
+             // A true a/b conflict. Determine the bounds involved from `a`, `o`, and `b`.
+             // Effectively merge all the `a` hunks into one giant hunk, then do the
+             // same for the `b` hunks; then, correct for skew in the regions of `o`
+             // that each side changed, and report appropriate spans for the three sides.
+             var bounds = {
+               a: [a.length, -1, o.length, -1],
+               b: [b.length, -1, o.length, -1]
+             };
 
+             while (regionHunks.length) {
+               hunk = regionHunks.shift();
+               var oStart = hunk.oStart;
+               var oEnd = oStart + hunk.oLength;
+               var abStart = hunk.abStart;
+               var abEnd = abStart + hunk.abLength;
+               var _b = bounds[hunk.ab];
+               _b[0] = Math.min(abStart, _b[0]);
+               _b[1] = Math.max(abEnd, _b[1]);
+               _b[2] = Math.min(oStart, _b[2]);
+               _b[3] = Math.max(oEnd, _b[3]);
+             }
 
-       function preventCoincident$1(loc) {
-         var coincident = 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);
+           }
 
-         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);
+           currOffset = regionEnd;
+         }
 
-         return loc;
-       }
+         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`
 
-       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]);
-             }, []);
-           });
 
-           if (!_cache$2) {
-             this.reset();
+       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
+             });
            }
 
-           this.event = utilRebind(this, dispatch$3, 'on');
-         },
-         reset: function reset() {
-           var _strings = {};
-           var _colors = {};
+           okBuffer = [];
+         }
 
-           if (_cache$2) {
-             Object.values(_cache$2.inflightTile).forEach(abortRequest$2); // Strings and colors are static and should not be re-populated
+         function isFalseConflict(a, b) {
+           if (a.length !== b.length) return false;
 
-             _strings = _cache$2.strings;
-             _colors = _cache$2.colors;
+           for (var i = 0; i < a.length; i++) {
+             if (a[i] !== b[i]) return false;
            }
 
-           _cache$2 = {
-             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
+           return true;
+         }
 
-           var tiles = tiler$2.zoomExtent([_tileZoom$2, _tileZoom$2]).getTiles(projection); // abort inflight requests that are no longer needed
+         regions.forEach(function (region) {
+           if (region.stable) {
+             var _okBuffer;
 
-           abortUnwantedRequests$2(_cache$2, tiles); // issue new requests..
+             (_okBuffer = okBuffer).push.apply(_okBuffer, _toConsumableArray(region.bufferContent));
+           } else {
+             if (options.excludeFalseConflicts && isFalseConflict(region.aContent, region.bContent)) {
+               var _okBuffer2;
 
-           tiles.forEach(function (tile) {
-             if (_cache$2.loadedTile[tile.id] || _cache$2.inflightTile[tile.id]) return;
+               (_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;
+       }
 
-             var _tile$xyz = _slicedToArray(tile.xyz, 3),
-                 x = _tile$xyz[0],
-                 y = _tile$xyz[1],
-                 z = _tile$xyz[2];
+       function actionMergeRemoteChanges(id, localGraph, remoteGraph, discardTags, formatUser) {
+         discardTags = discardTags || {};
+         var _option = 'safe'; // 'safe', 'force_local', 'force_remote'
 
-             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 _conflicts = [];
 
-               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) */
+         function user(d) {
+           return typeof formatUser === 'function' ? formatUser(d) : d;
+         }
 
-                   var itemType = "".concat(item, "-").concat(cl); // Filter out unsupported issue types (some are too specific or advanced)
+         function mergeLocation(remote, target) {
+           function pointEqual(a, b) {
+             var epsilon = 1e-6;
+             return Math.abs(a[0] - b[0]) < epsilon && Math.abs(a[1] - b[1]) < epsilon;
+           }
 
-                   if (itemType in _osmoseData.icons) {
-                     var loc = issue.geometry.coordinates; // lon, lat
+           if (_option === 'force_local' || pointEqual(target.loc, remote.loc)) {
+             return target;
+           }
 
-                     loc = preventCoincident$1(loc);
-                     var d = new QAItem(loc, _this, itemType, id, {
-                       item: item
-                     }); // Setting elems here prevents UI detail requests
+           if (_option === 'force_remote') {
+             return target.update({
+               loc: remote.loc
+             });
+           }
 
-                     if (item === 8300 || item === 8360) {
-                       d.elems = [];
-                     }
+           _conflicts.push(_t('merge_remote_changes.conflict.location', {
+             user: user(remote.user)
+           }));
 
-                     _cache$2.data[d.id] = d;
+           return target;
+         }
 
-                     _cache$2.rtree.insert(encodeIssueRtree$2(d));
-                   }
-                 });
-               }
+         function mergeNodes(base, remote, target) {
+           if (_option === 'force_local' || fastDeepEqual(target.nodes, remote.nodes)) {
+             return target;
+           }
 
-               dispatch$3.call('loaded');
-             })["catch"](function () {
-               delete _cache$2.inflightTile[tile.id];
-               _cache$2.loadedTile[tile.id] = true;
+           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
            });
-         },
-         loadIssueDetail: function loadIssueDetail(issue) {
-           var _this2 = this;
 
-           // Issue details only need to be fetched once
-           if (issue.elems !== undefined) {
-             return Promise.resolve(issue);
-           }
+           for (var i = 0; i < hunks.length; i++) {
+             var hunk = hunks[i];
+
+             if (hunk.ok) {
+               nodes.push.apply(nodes, hunk.ok);
+             } else {
+               // for all conflicts, we can assume c.a !== c.b
+               // because `diff3Merge` called with `true` option to exclude false conflicts..
+               var c = hunk.conflict;
+
+               if (fastDeepEqual(c.o, c.a)) {
+                 // only changed remotely
+                 nodes.push.apply(nodes, c.b);
+               } else if (fastDeepEqual(c.o, c.b)) {
+                 // only changed locally
+                 nodes.push.apply(nodes, c.a);
+               } else {
+                 // changed both locally and remotely
+                 _conflicts.push(_t('merge_remote_changes.conflict.nodelist', {
+                   user: user(remote.user)
+                 }));
 
-           var url = "".concat(_osmoseUrlRoot, "/issue/").concat(issue.id, "?langs=").concat(_mainLocalizer.localeCode());
+                 break;
+               }
+             }
+           }
 
-           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 _conflicts.length === ccount ? target.update({
+             nodes: nodes
+           }) : target;
+         }
 
-             issue.detail = data.subtitle ? marked_1(data.subtitle.auto) : '';
+         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;
+           }
 
-             _this2.replaceItem(issue);
-           };
+           var ccount = _conflicts.length;
 
-           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);
+           for (var i = 0; i < children.length; i++) {
+             var id = children[i];
+             var node = graph.hasEntity(id); // remove unused childNodes..
 
-           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
+             if (targetWay.nodes.indexOf(id) === -1) {
+               if (node && !isUsed(node, targetWay)) {
+                 updates.removeIds.push(id);
+               }
 
+               continue;
+             } // restore used childNodes..
 
-           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 local = localGraph.hasEntity(id);
+             var remote = remoteGraph.hasEntity(id);
+             var target;
 
-           var allRequests = items.map(function (itemType) {
-             // No need to request data we already have
-             if (itemType in _cache$2.strings[locale]) return null;
+             if (_option === 'force_remote' && remote && remote.visible) {
+               updates.replacements.push(remote);
+             } else if (_option === 'force_local' && local) {
+               target = osmEntity(local);
 
-             var cacheData = function cacheData(data) {
-               // Bunch of nested single value arrays of objects
-               var _data$categories = _slicedToArray(data.categories, 1),
-                   _data$categories$ = _data$categories[0],
-                   cat = _data$categories$ === void 0 ? {
-                 items: []
-               } : _data$categories$;
+               if (remote) {
+                 target = target.update({
+                   version: remote.version
+                 });
+               }
 
-               var _cat$items = _slicedToArray(cat.items, 1),
-                   _cat$items$ = _cat$items[0],
-                   item = _cat$items$ === void 0 ? {
-                 "class": []
-               } : _cat$items$;
+               updates.replacements.push(target);
+             } else if (_option === 'safe' && local && remote && local.version !== remote.version) {
+               target = osmEntity(local, {
+                 version: remote.version
+               });
 
-               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 (remote.visible) {
+                 target = mergeLocation(remote, target);
+               } else {
+                 _conflicts.push(_t('merge_remote_changes.conflict.deleted', {
+                   user: user(remote.user)
+                 }));
+               }
 
+               if (_conflicts.length !== ccount) break;
+               updates.replacements.push(target);
+             }
+           }
 
-               if (!cl) {
-                 /* eslint-disable no-console */
-                 console.log("Osmose strings request (".concat(itemType, ") had unexpected data"));
-                 /* eslint-enable no-console */
+           return targetWay;
+         }
 
-                 return;
-               } // Cache served item colors to automatically style issue markers later
+         function updateChildren(updates, graph) {
+           for (var i = 0; i < updates.replacements.length; i++) {
+             graph = graph.replace(updates.replacements[i]);
+           }
 
+           if (updates.removeIds.length) {
+             graph = actionDeleteMultiple(updates.removeIds)(graph);
+           }
 
-               var itemInt = item.item,
-                   color = item.color;
+           return graph;
+         }
 
-               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
+         function mergeMembers(remote, target) {
+           if (_option === 'force_local' || fastDeepEqual(target.members, remote.members)) {
+             return target;
+           }
 
+           if (_option === 'force_remote') {
+             return target.update({
+               members: remote.members
+             });
+           }
 
-               var title = cl.title,
-                   detail = cl.detail,
-                   fix = cl.fix,
-                   trap = cl.trap; // Osmose titles shouldn't contain markdown
+           _conflicts.push(_t('merge_remote_changes.conflict.memberlist', {
+             user: user(remote.user)
+           }));
 
-               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;
-             };
+           return target;
+         }
 
-             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 mergeTags(base, remote, target) {
+           if (_option === 'force_local' || fastDeepEqual(target.tags, remote.tags)) {
+             return target;
+           }
 
+           if (_option === 'force_remote') {
+             return target.update({
+               tags: remote.tags
+             });
+           }
 
-             var 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];
+           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];
            });
-         },
-         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;
-
-           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'
-
+           var tags = Object.assign({}, a); // shallow copy
 
-           var url = "".concat(_osmoseUrlRoot, "/issue/").concat(issue.id, "/").concat(issue.newStatus);
-           var controller = new AbortController();
+           var changed = false;
 
-           var after = function after() {
-             delete _cache$2.inflightPost[issue.id];
+           for (var i = 0; i < keys.length; i++) {
+             var k = keys[i];
 
-             _this3.removeItem(issue);
+             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];
+                 }
 
-             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;
+                 changed = true;
                }
-
-               _cache$2.closed[issue.item] += 1;
              }
+           }
 
-             if (callback) callback(null, issue);
-           };
+           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`
+         //
 
-           _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
 
-           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 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
 
-       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;
+           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 _mlyCache;
+               return graph.replace(target);
+             } else {
+               _conflicts.push(_t('merge_remote_changes.conflict.deleted', {
+                 user: user(remote.user)
+               }));
 
-       var _mlyClicks;
+               return graph; // do nothing
+             }
+           } // merge
 
-       var _mlyActiveImage;
 
-       var _mlySelectedImageKey;
+           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);
+           }
 
-       var _mlyViewer;
+           target = mergeTags(base, remote, target);
 
-       var _mlyViewerFilter = ['all'];
+           if (!_conflicts.length) {
+             graph = updateChildren(updates, graph).replace(target);
+           }
 
-       var _loadViewerPromise;
+           return graph;
+         };
 
-       var _mlyHighlightedDetection;
+         action.withOption = function (opt) {
+           _option = opt;
+           return action;
+         };
 
-       var _mlyShowFeatureDetections = false;
-       var _mlyShowSignDetections = false;
+         action.conflicts = function () {
+           return _conflicts;
+         };
 
-       function abortRequest$3(controller) {
-         controller.abort();
+         return action;
        }
 
-       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
+       // https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/MoveNodeAction.as
 
-         var cache = _mlyCache[which];
-         Object.keys(cache.inflight).forEach(function (k) {
-           var wanted = tiles.find(function (tile) {
-             return k.indexOf(tile.id + ',') === 0;
-           });
+       function actionMove(moveIDs, tryDelta, projection, cache) {
+         var _delta = tryDelta;
 
-           if (!wanted) {
-             abortRequest$3(cache.inflight[k]);
-             delete cache.inflight[k];
-           }
-         });
-         tiles.forEach(function (tile) {
-           loadNextTilePage(which, currZoom, url, tile);
-         });
-       }
+         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..
 
-       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);
-           }
+             var parents = graph.parentWays(graph.entity(nodeID));
+             if (parents.length < 3) return true; // Restrict movement of a vertex where >2 ways meet, unless all parentWays are moving too..
 
-           var linkHeader = response.headers.get('Link');
+             var parentsMoving = parents.every(function (way) {
+               return cache.moving[way.id];
+             });
+             if (!parentsMoving) delete cache.moving[nodeID];
+             return parentsMoving;
+           }
 
-           if (linkHeader) {
-             var pagination = parsePagination(linkHeader);
+           function cacheEntities(ids) {
+             for (var i = 0; i < ids.length; i++) {
+               var id = ids[i];
+               if (cache.moving[id]) continue;
+               cache.moving[id] = true;
+               var entity = graph.hasEntity(id);
+               if (!entity) continue;
 
-             if (pagination.next) {
-               cache.nextURL[tile.id] = pagination.next;
+               if (entity.type === 'node') {
+                 cache.nodes.push(id);
+                 cache.startLoc[id] = entity.loc;
+               } else if (entity.type === 'way') {
+                 cache.ways.push(id);
+                 cacheEntities(entity.nodes);
+               } else {
+                 cacheEntities(entity.members.map(function (member) {
+                   return member.id;
+                 }));
+               }
              }
            }
 
-           return response.json();
-         }).then(function (data) {
-           cache.loaded[id] = true;
-           delete cache.inflight[id];
+           function cacheIntersections(ids) {
+             function isEndpoint(way, id) {
+               return !way.isClosed() && !!way.affix(id);
+             }
 
-           if (!data || !data.features || !data.features.length) {
-             throw new Error('No Data');
-           }
+             for (var i = 0; i < ids.length; i++) {
+               var id = ids[i]; // consider only intersections with 1 moved and 1 unmoved way.
 
-           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
+               var childNodes = graph.childNodes(graph.entity(id));
 
-             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,
-                 detections: feature.properties.detections,
-                 direction: feature.properties.direction,
-                 accuracy: feature.properties.accuracy,
-                 first_seen_at: feature.properties.first_seen_at,
-                 last_seen_at: feature.properties.last_seen_at
-               };
-             }
+               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;
 
-             return {
-               minX: loc[0],
-               minY: loc[1],
-               maxX: loc[0],
-               maxY: loc[1],
-               data: d
-             };
-           }).filter(Boolean);
+                 for (var k = 0; k < parents.length; k++) {
+                   var way = parents[k];
 
-           if (cache.rtree && features) {
-             cache.rtree.load(features);
-           }
+                   if (!cache.moving[way.id]) {
+                     unmoved = way;
+                     break;
+                   }
+                 }
 
-           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
-           }
+                 if (!unmoved) continue; // exclude ways that are overly connected..
 
-           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');
+                 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)
+                 });
+               }
+             }
            }
-         })["catch"](function () {
-           cache.loaded[id] = true;
-           delete cache.inflight[id];
-         });
-       }
 
-       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 (!cache) {
+             cache = {};
            }
 
-           return response.json();
-         }).then(function (data) {
-           if (!data || !data.features || !data.features.length) {
-             throw new Error('No Data');
+           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;
            }
-
-           data.features.forEach(function (feature) {
-             var d;
-
-             if (which === 'image_detections') {
-               d = {
-                 key: feature.properties.key,
-                 image_key: feature.properties.image_key,
-                 value: feature.properties.value,
-                 shape: feature.properties.shape
-               };
-
-               if (!cache.forImageKey[d.image_key]) {
-                 cache.forImageKey[d.image_key] = [];
-               }
-
-               cache.forImageKey[d.image_key].push(d);
-             }
-           });
-         });
-       }
-
-       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
+         } // Place a vertex where the moved vertex used to be, to preserve way shape..
+         //
+         //  Start:
+         //      b ---- e
+         //     / \
+         //    /   \
+         //   /     \
+         //  a       c
+         //
+         //      *               node '*' added to preserve shape
+         //     / \
+         //    /   b ---- e      way `b,e` moved here:
+         //   /     \
+         //  a       c
+         //
+         //
 
 
-       function parsePagination(links) {
-         return links.split(',').map(function (rel) {
-           var elements = rel.split(';');
+         function replaceMovedVertex(nodeId, wayId, graph, delta) {
+           var way = graph.entity(wayId);
+           var moved = graph.entity(nodeId);
+           var movedIndex = way.nodes.indexOf(nodeId);
+           var len, prevIndex, nextIndex;
 
-           if (elements.length === 2) {
-             return [/<(.+)>/.exec(elements[0])[1], /rel="(.+)"/.exec(elements[1])[1]];
+           if (way.isClosed()) {
+             len = way.nodes.length - 1;
+             prevIndex = (movedIndex + len - 1) % len;
+             nextIndex = (movedIndex + len + 1) % len;
            } else {
-             return ['', ''];
+             len = way.nodes.length;
+             prevIndex = movedIndex - 1;
+             nextIndex = movedIndex + 1;
            }
-         }).reduce(function (pagination, val) {
-           pagination[val[1]] = val[0];
-           return pagination;
-         }, {});
-       } // partition viewport into higher zoom tiles
-
 
-       function partitionViewport(projection) {
-         var z = geoScaleToZoom(projection.scale());
-         var z2 = Math.ceil(z * 2) / 2 + 2.5; // round to next 0.5 and add 2.5
+           var prev = graph.hasEntity(way.nodes[prevIndex]);
+           var next = graph.hasEntity(way.nodes[nextIndex]); // Don't add orig vertex at endpoint..
 
-         var tiler = utilTiler().zoomExtent([z2, z2]);
-         return tiler.getTiles(projection).map(function (tile) {
-           return tile.extent;
-         });
-       } // no more than `limit` results per partition.
+           if (!prev || !next) return graph;
+           var key = wayId + '_' + nodeId;
+           var orig = cache.replacedVertex[key];
 
+           if (!orig) {
+             orig = osmNode();
+             cache.replacedVertex[key] = orig;
+             cache.startLoc[orig.id] = cache.startLoc[nodeId];
+           }
 
-       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;
-         }, []);
-       }
+           var start, end;
 
-       var serviceMapillary = {
-         init: function init() {
-           if (!_mlyCache) {
-             this.reset();
+           if (delta) {
+             start = projection(cache.startLoc[nodeId]);
+             end = projection.invert(geoVecAdd(start, delta));
+           } else {
+             end = cache.startLoc[nodeId];
            }
 
-           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);
-           }
+           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..
 
-           _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
+           if (angle > 175 && angle < 185) return graph; // moving forward or backward along way?
 
-           _mlyCache.images.rtree.search(bbox).forEach(function (d) {
-             var sequenceKey = _mlyCache.sequences.forImageKey[d.data.key];
+           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 (sequenceKey) {
-               sequenceKeys[sequenceKey] = true;
-             }
-           }); // Return lineStrings for the sequences
+           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.
 
 
-           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
+         function removeDuplicateVertices(wayId, graph) {
+           var way = graph.entity(wayId);
+           var epsilon = 1e-6;
+           var prev, curr;
 
-           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;
+           function isInteresting(node, graph) {
+             return graph.parentWays(node).length > 1 || graph.parentRelations(node).length || node.hasInterestingTags();
+           }
 
-             function loaded() {
-               loadedCount += 1; // wait until both files are loaded
+           for (var i = 0; i < way.nodes.length; i++) {
+             curr = graph.entity(way.nodes[i]);
 
-               if (loadedCount === 2) resolve();
+             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);
+               }
              }
 
-             var head = select('head'); // load mapillary-viewercss
+             prev = curr;
+           }
 
-             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
+           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
+         //
 
-             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);
+
+         function unZorroIntersection(intersection, graph) {
+           var vertex = graph.entity(intersection.nodeId);
+           var way1 = graph.entity(intersection.movedId);
+           var way2 = graph.entity(intersection.unmovedId);
+           var isEP1 = intersection.movedIsEP;
+           var isEP2 = intersection.unmovedIsEP; // don't move the vertex if it is the endpoint of both ways.
+
+           if (isEP1 && isEP2) return graph;
+           var nodes1 = graph.childNodes(way1).filter(function (n) {
+             return n !== vertex;
            });
-           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
+           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)..
 
-           }
-         },
-         showFeatureDetections: function showFeatureDetections(value) {
-           _mlyShowFeatureDetections = value;
+           if (!isEP1 && !isEP2) {
+             var epsilon = 1e-6,
+                 maxIter = 10;
 
-           if (!_mlyShowFeatureDetections && !_mlyShowSignDetections) {
-             this.resetTags();
+             for (var i = 0; i < maxIter; i++) {
+               loc = geoVecInterp(edge1.loc, edge2.loc, 0.5);
+               edge1 = geoChooseEdge(nodes1, projection(loc), projection);
+               edge2 = geoChooseEdge(nodes2, projection(loc), projection);
+               if (Math.abs(edge1.distance - edge2.distance) < epsilon) break;
+             }
+           } else if (!isEP1) {
+             loc = edge1.loc;
+           } else {
+             loc = edge2.loc;
            }
-         },
-         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]]);
+           graph = graph.replace(vertex.move(loc)); // if zorro happened, reorder nodes..
 
-           if (fromDate) {
-             var fromTimestamp = new Date(fromDate).getTime();
-             filter.push(['>=', 'capturedAt', fromTimestamp]);
+           if (!isEP1 && edge1.index !== way1.nodes.indexOf(vertex.id)) {
+             way1 = way1.removeNode(vertex.id).addNode(vertex.id, edge1.index);
+             graph = graph.replace(way1);
            }
 
-           if (toDate) {
-             var toTimestamp = new Date(toDate).getTime();
-             filter.push(['>=', 'capturedAt', toTimestamp]);
+           if (!isEP2 && edge2.index !== way2.nodes.indexOf(vertex.id)) {
+             way2 = way2.removeNode(vertex.id).addNode(vertex.id, edge2.index);
+             graph = graph.replace(way2);
            }
 
-           if (_mlyViewer) {
-             _mlyViewer.setFilter(filter);
+           return graph;
+         }
+
+         function cleanupIntersections(graph) {
+           for (var i = 0; i < cache.intersections.length; i++) {
+             var obj = cache.intersections[i];
+             graph = replaceMovedVertex(obj.nodeId, obj.movedId, graph, _delta);
+             graph = replaceMovedVertex(obj.nodeId, obj.unmovedId, graph, null);
+             graph = unZorroIntersection(obj, graph);
+             graph = removeDuplicateVertices(obj.movedId, graph);
+             graph = removeDuplicateVertices(obj.unmovedId, graph);
            }
 
-           _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();
+           return graph;
+         } // check if moving way endpoint can cross an unmoved way, if so limit delta..
 
-           if (isHidden && _mlyViewer) {
-             wrap.selectAll('.photo-wrapper:not(.mly-wrapper)').classed('hide', true);
-             wrap.selectAll('.photo-wrapper.mly-wrapper').classed('hide', false);
 
-             _mlyViewer.resize();
+         function limitDelta(graph) {
+           function moveNode(loc) {
+             return geoVecAdd(projection(loc), _delta);
            }
 
-           return this;
-         },
-         hideViewer: function hideViewer(context) {
-           _mlyActiveImage = null;
-           _mlySelectedImageKey = null;
+           for (var i = 0; i < cache.intersections.length; i++) {
+             var obj = cache.intersections[i]; // Don't limit movement if this is vertex joins 2 endpoints..
 
-           if (!_mlyFallback && _mlyViewer) {
-             _mlyViewer.getComponent('sequence').stop();
-           }
+             if (obj.movedIsEP && obj.unmovedIsEP) continue; // Don't limit movement if this vertex is not an endpoint anyway..
 
-           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 (!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 (imageKey) {
-               hash.photo = 'mapillary/' + imageKey;
-             } else {
-               delete hash.photo;
+             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);
              }
-
-             window.location.replace('#' + utilQsString(hash, true));
-           }
-         },
-         highlightDetection: function highlightDetection(detection) {
-           if (detection) {
-             _mlyHighlightedDetection = detection.detection_key;
            }
+         }
 
-           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
+         var action = function action(graph) {
+           if (_delta[0] === 0 && _delta[1] === 0) return graph;
+           setupCache(graph);
 
-             };
+           if (cache.intersections.length) {
+             limitDelta(graph);
            }
 
-           _mlyViewer = new Mapillary.Viewer('ideditor-mly', clientId, null, opts);
-
-           _mlyViewer.on('nodechanged', nodeChanged);
+           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)));
+           }
 
-           _mlyViewer.on('bearingchanged', bearingChanged);
+           if (cache.intersections.length) {
+             graph = cleanupIntersections(graph);
+           }
 
-           if (_mlyViewerFilter) {
-             _mlyViewer.setFilter(_mlyViewerFilter);
-           } // Register viewer resize handler
+           return graph;
+         };
 
+         action.delta = function () {
+           return _delta;
+         };
 
-           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.
-           //
+         return action;
+       }
 
-           function nodeChanged(node) {
-             that.resetTags();
-             var clicks = _mlyClicks;
-             var index = clicks.indexOf(node.key);
-             var selectedKey = _mlySelectedImageKey;
-             that.setActiveImage(node);
+       function actionMoveMember(relationId, fromIndex, toIndex) {
+         return function (graph) {
+           return graph.replace(graph.entity(relationId).moveMember(fromIndex, toIndex));
+         };
+       }
 
-             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..
+       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 (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);
-             }
+         action.transitionable = true;
+         return action;
+       }
 
-             dispatch$4.call('nodeChanged');
-           }
+       function actionNoop() {
+         return function (graph) {
+           return graph;
+         };
+       }
 
-           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;
+       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)
 
-           if (!fromViewer && imageKey) {
-             _mlyClicks.push(imageKey);
-           }
+         var lowerThreshold = Math.cos((90 - threshold) * Math.PI / 180);
+         var upperThreshold = Math.cos(threshold * Math.PI / 180);
 
-           this.setStyles(context, null, true);
+         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
 
-           if (_mlyShowFeatureDetections) {
-             this.updateDetections(imageKey, apibase + 'image_detections?layers=points&values=' + mapFeatureConfig.values + '&image_keys=' + imageKey);
-           }
+           if (way.tags.nonsquare) {
+             var tags = Object.assign({}, way.tags); // since we're squaring, remove indication that this is physically unsquare
 
-           if (_mlyShowSignDetections) {
-             this.updateDetections(imageKey, apibase + 'image_detections?layers=trafficsigns&image_keys=' + imageKey);
+             delete tags.nonsquare;
+             way = way.update({
+               tags: tags
+             });
            }
 
-           if (_mlyViewer && imageKey) {
-             _mlyViewer.moveToKey(imageKey)["catch"](function (e) {
-               console.error('mly3', e);
-             }); // eslint-disable-line no-console
+           graph = graph.replace(way);
+           var isClosed = way.isClosed();
+           var nodes = graph.childNodes(way).slice(); // shallow copy
 
-           }
+           if (isClosed) nodes.pop();
 
-           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);
-           }
+           if (vertexID !== undefined) {
+             nodes = nodeSubset(nodes, vertexID, isClosed);
+             if (nodes.length !== 3) return graph;
+           } // note: all geometry functions here use the unclosed node/point/coord list
 
-           var 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
 
-           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
+           var nodeCount = {};
+           var points = [];
+           var corner = {
+             i: 0,
+             dotp: 1
+           };
+           var node, point, loc, score, motions, i, j;
 
-           context.container().selectAll('.viewfield-group .viewfield').attr('d', viewfieldPath);
+           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)
+             });
+           }
 
-           function viewfieldPath() {
-             var d = this.parentNode.__data__;
+           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 (d.pano && d.key !== selectedImageKey) {
-               return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
-             } else {
-               return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
+               if (score < epsilon) {
+                 break;
+               }
              }
-           }
 
-           return this;
-         },
-         updateDetections: function updateDetections(imageKey, url) {
-           if (!_mlyViewer || _mlyFallback) return;
-           if (!imageKey) return;
-
-           if (!_mlyCache.image_detections.forImageKey[imageKey]) {
-             loadData('image_detections', url).then(function () {
-               showDetections(_mlyCache.image_detections.forImageKey[imageKey] || []);
-             });
+             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 {
-             showDetections(_mlyCache.image_detections.forImageKey[imageKey]);
-           }
+             var straights = [];
+             var simplified = []; // Remove points from nearly straight sections..
+             // This produces a simplified shape to orthogonalize
 
-           function showDetections(detections) {
-             detections.forEach(function (data) {
-               var tag = makeTag(data);
+             for (i = 0; i < points.length; i++) {
+               point = points[i];
+               var dotp = 0;
 
-               if (tag) {
-                 var tagComponent = _mlyViewer.getComponent('tag');
+               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));
+               }
 
-                 tagComponent.add([tag]);
+               if (dotp > upperThreshold) {
+                 straights.push(point);
+               } else {
+                 simplified.push(point);
                }
-             });
-           }
+             } // Orthogonalize the simplified shape
 
-           function makeTag(data) {
-             var valueParts = data.value.split('--');
-             if (!valueParts.length) return;
-             var tag;
-             var text;
-             var color = 0xffffff;
 
-             if (_mlyHighlightedDetection === data.key) {
-               color = 0xffff00;
-               text = valueParts[1];
+             var bestPoints = clonePoints(simplified);
+             var originalPoints = clonePoints(simplified);
+             score = Infinity;
 
-               if (text === 'flat' || text === 'discrete' || text === 'sign') {
-                 text = valueParts[2];
+             for (i = 0; i < 1000; i++) {
+               motions = simplified.map(calcMotion);
+
+               for (j = 0; j < motions.length; j++) {
+                 simplified[j].coord = geoVecAdd(simplified[j].coord, motions[j]);
                }
 
-               text = text.replace(/-/g, ' ');
-               text = text.charAt(0).toUpperCase() + text.slice(1);
-               _mlyHighlightedDetection = null;
-             }
+               var newScore = geoOrthoCalcScore(simplified, isClosed, epsilon, threshold);
 
-             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
-               });
-             }
+               if (newScore < score) {
+                 bestPoints = clonePoints(simplified);
+                 score = newScore;
+               }
 
-             return tag;
-           }
-         },
-         cache: function cache() {
-           return _mlyCache;
-         }
-       };
+               if (score < epsilon) {
+                 break;
+               }
+             }
 
-       function validationIssue(attrs) {
-         this.type = attrs.type; // required - name of rule that created the issue (e.g. 'missing_tag')
+             var bestCoords = bestPoints.map(function (p) {
+               return p.coord;
+             });
+             if (isClosed) bestCoords.push(bestCoords[0]); // move the nodes that should move
 
-         this.subtype = attrs.subtype; // optional - category of the issue within the type (e.g. 'relation_type' under 'missing_tag')
+             for (i = 0; i < bestPoints.length; i++) {
+               point = bestPoints[i];
 
-         this.severity = attrs.severity; // required - 'warning' or 'error'
+               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
 
-         this.message = attrs.message; // required - function returning localized string
 
-         this.reference = attrs.reference; // optional - function(selection) to render reference information
+             for (i = 0; i < straights.length; i++) {
+               point = straights[i];
+               if (nodeCount[point.id] > 1) continue; // skip self-intersections
 
-         this.entityIds = attrs.entityIds; // optional - array of IDs of entities involved in the issue
+               node = graph.entity(point.id);
 
-         this.loc = attrs.loc; // optional - [lon, lat] to zoom in on to see the issue
+               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);
 
-         this.data = attrs.data; // optional - object containing extra data for the fixes
+                 if (choice) {
+                   loc = projection.invert(choice.target);
+                   graph = graph.replace(node.move(geoVecInterp(node.loc, loc, t)));
+                 }
+               }
+             }
+           }
 
-         this.dynamicFixes = attrs.dynamicFixes; // optional - function(context) returning fixes
+           return graph;
 
-         this.hash = attrs.hash; // optional - string to further differentiate the issue
+           function clonePoints(array) {
+             return array.map(function (p) {
+               return {
+                 id: p.id,
+                 coord: [p.coord[0], p.coord[1]]
+               };
+             });
+           }
 
-         this.id = generateID.apply(this); // generated - see below
+           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)
 
-         this.autoFix = null; // generated - if autofix exists, will be set below
-         // A unique, deterministic string hash.
-         // Issues with identical id values are considered identical.
+             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 generateID() {
-           var parts = [this.type];
+             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 (this.hash) {
-             // subclasses can pass in their own differentiator
-             parts.push(this.hash);
+             return [0, 0]; // do nothing
            }
+         }; // if we are only orthogonalizing one vertex,
+         // get that vertex and the previous and next
 
-           if (this.subtype) {
-             parts.push(this.subtype);
-           } // include the entities this issue is for
-           // (sort them so the id is deterministic)
 
+         function nodeSubset(nodes, vertexID, isClosed) {
+           var first = isClosed ? 0 : 1;
+           var last = isClosed ? nodes.length : nodes.length - 1;
 
-           if (this.entityIds) {
-             var entityKeys = this.entityIds.slice().sort();
-             parts.push.apply(parts, entityKeys);
+           for (var i = first; i < last; i++) {
+             if (nodes[i].id === vertexID) {
+               return [nodes[(i - 1 + nodes.length) % nodes.length], nodes[i], nodes[(i + 1) % nodes.length]];
+             }
            }
 
-           return parts.join(':');
+           return [];
          }
 
-         this.extent = function (resolver) {
-           if (this.loc) {
-             return geoExtent(this.loc);
-           }
-
-           if (this.entityIds && this.entityIds.length) {
-             return this.entityIds.reduce(function (extent, entityId) {
-               return extent.extend(resolver.entity(entityId).extent(resolver));
-             }, geoExtent());
-           }
+         action.disabled = function (graph) {
+           var way = graph.entity(wayID);
+           way = way.removeNode(''); // sanity check - remove any consecutive duplicates
 
-           return null;
-         };
+           graph = graph.replace(way);
+           var isClosed = way.isClosed();
+           var nodes = graph.childNodes(way).slice(); // shallow copy
 
-         this.fixes = function (context) {
-           var fixes = this.dynamicFixes ? this.dynamicFixes(context) : [];
-           var issue = this;
+           if (isClosed) nodes.pop();
+           var allowStraightAngles = false;
 
-           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);
-               }
-             }));
+           if (vertexID !== undefined) {
+             allowStraightAngles = true;
+             nodes = nodeSubset(nodes, vertexID, isClosed);
+             if (nodes.length !== 3) return 'end_vertex';
            }
 
-           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
-
-             fix.issue = issue;
-
-             if (fix.autoArgs) {
-               issue.autoFix = fix;
-             }
+           var coords = nodes.map(function (n) {
+             return projection(n.loc);
            });
-           return fixes;
-         };
-       }
-       function validationIssueFix(attrs) {
-         this.title = attrs.title; // Required
+           var score = geoOrthoCanOrthogonalize(coords, isClosed, epsilon, threshold, allowStraightAngles);
 
-         this.onClick = attrs.onClick; // Optional - the function to run to apply the fix
+           if (score === null) {
+             return 'not_squarish';
+           } else if (score === 0) {
+             return 'square_enough';
+           } else {
+             return false;
+           }
+         };
 
-         this.disabledReason = attrs.disabledReason; // Optional - a string explaining why the fix is unavailable, if any
+         action.transitionable = true;
+         return action;
+       }
 
-         this.icon = attrs.icon; // Optional - shows 'iD-icon-wrench' if not set
+       //
+       // `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.
+       //
 
-         this.entityIds = attrs.entityIds || []; // Optional - used for hover-higlighting.
+       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'
+           });
 
-         this.autoArgs = attrs.autoArgs; // Optional - pass [actions, annotation] arglist if this fix can automatically run
+           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'
+               });
+             });
+           }
 
-         this.issue = null; // Generated link - added by validationIssue
+           members.push({
+             id: toWay.id,
+             type: 'way',
+             role: 'to'
+           });
+           return graph.replace(osmRelation({
+             id: restrictionID,
+             tags: {
+               type: 'restriction',
+               restriction: restrictionType
+             },
+             members: members
+           }));
+         };
        }
 
-       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];
+       function actionRevert(id) {
+         var action = function action(graph) {
+           var entity = graph.hasEntity(id),
+               base = graph.base().entities[id];
 
-             var expression = _positiveRegex[tagKey].join('|');
+           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);
 
-             var regex = new RegExp(expression);
-             return function (tags) {
-               return regex.test(tags[tagKey]);
-             };
-           },
-           negativeRegex: function negativeRegex(_negativeRegex) {
-             var tagKey = Object.keys(_negativeRegex)[0];
+                 if (parent.isDegenerate()) {
+                   graph = actionDeleteWay(parent.id)(graph);
+                 }
+               });
+             }
 
-             var expression = _negativeRegex[tagKey].join('|');
+             graph.parentRelations(entity).forEach(function (parent) {
+               parent = parent.removeMembersWithID(id);
+               graph = graph.replace(parent);
 
-             var regex = new RegExp(expression);
-             return function (tags) {
-               return !regex.test(tags[tagKey]);
-             };
+               if (parent.isDegenerate()) {
+                 graph = actionDeleteRelation(parent.id)(graph);
+               }
+             });
            }
+
+           return graph.revert(id);
          };
-       };
 
-       var buildLineKeys = function buildLineKeys() {
-         return {
-           highway: {
-             rest_area: true,
-             services: true
-           },
-           railway: {
-             roundhouse: true,
-             station: true,
-             traverser: true,
-             turntable: true,
-             wash: true
-           }
+         return action;
+       }
+
+       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)));
+             });
+           });
          };
-       };
 
-       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]));
-             }
+         return action;
+       }
 
-             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, '');
+       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)));
              });
-           };
+           });
+         };
+       }
 
-           var tagMap = Object.keys(selector).reduce(function (expectedTags, key) {
-             var values;
-             var isRegex = /regex/gi.test(key);
-             var isEqual = /equals/gi.test(key);
+       /* Align nodes along their common axis */
 
-             if (isRegex || isEqual) {
-               Object.keys(selector[key]).forEach(function (selectorKey) {
-                 values = isEqual ? [selector[key][selectorKey]] : getRegexValues(selector[key][selectorKey]);
+       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 (expectedTags.hasOwnProperty(selectorKey)) {
-                   values = values.concat(expectedTags[selectorKey]);
-                 }
 
-                 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]];
+         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);
+
+           if (isLong) {
+             return [p1, q1];
+           }
 
-               if (expectedTags.hasOwnProperty(tagKey)) {
-                 values = values.concat(expectedTags[tagKey]);
-               }
+           return [p2, q2];
+         }
 
-               expectedTags[tagKey] = values;
-             }
+         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
 
-             return expectedTags;
-           }, {});
-           return tagMap;
-         },
-         // inspired by osmWay#isArea()
-         inferGeometry: function inferGeometry(tagMap) {
-           var _lineKeys = this._lineKeys;
-           var _areaKeys = this._areaKeys;
+           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)));
+           }
 
-           var keyValueDoesNotImplyArea = function keyValueDoesNotImplyArea(key) {
-             return utilArrayIntersection(tagMap[key], Object.keys(_areaKeys[key])).length > 0;
-           };
+           return graph;
+         };
 
-           var keyValueImpliesLine = function keyValueImpliesLine(key) {
-             return utilArrayIntersection(tagMap[key], Object.keys(_lineKeys[key])).length > 0;
-           };
+         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 (tagMap.hasOwnProperty('area')) {
-             if (tagMap.area.indexOf('yes') > -1) {
-               return 'area';
-             }
+           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 (tagMap.area.indexOf('no') > -1) {
-               return 'line';
+             if (!isNaN(dist) && dist > maxDistance) {
+               maxDistance = dist;
              }
            }
 
-           for (var key in tagMap) {
-             if (key in _areaKeys && !keyValueDoesNotImplyArea(key)) {
-               return 'area';
-             }
-
-             if (key in _lineKeys && keyValueImpliesLine(key)) {
-               return 'area';
-             }
+           if (maxDistance < 0.0001) {
+             return 'straight_enough';
            }
+         };
 
-           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]
-                 }));
-               }
-             }
-           };
+         action.transitionable = true;
+         return action;
+       }
 
-           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;
-         }
-       };
+       /*
+        * Based on https://github.com/openstreetmap/potlatch2/net/systemeD/potlatch2/tools/Straighten.as
+        */
 
-       var apibase$1 = 'https://nominatim.openstreetmap.org/';
-       var _inflight = {};
+       function actionStraightenWay(selectedIDs, projection) {
+         function positionAlongWay(a, o, b) {
+           return geoVecDot(a, b, o) / geoVecDot(b, b, o);
+         } // Return all selected ways as a continuous, ordered array of nodes
 
-       var _nominatimCache;
 
-       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);
-             }
+         function allNodes(graph) {
+           var nodes = [];
+           var startNodes = [];
+           var endNodes = [];
+           var remainingWays = [];
+           var selectedWays = selectedIDs.filter(function (w) {
+             return graph.entity(w).type === 'way';
            });
-         },
-         reverse: function reverse(loc, callback) {
-           var cached = _nominatimCache.search({
-             minX: loc[0],
-             minY: loc[1],
-             maxX: loc[0],
-             maxY: loc[1]
+           var selectedNodes = selectedIDs.filter(function (n) {
+             return graph.entity(n).type === 'node';
            });
 
-           if (cached.length > 0) {
-             if (callback) callback(null, cached[0].data);
-             return;
-           }
+           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"]
 
-           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];
 
-             if (result && result.error) {
-               throw new Error(result.error);
-             }
+           startNodes = startNodes.filter(function (n) {
+             return startNodes.indexOf(n) === startNodes.lastIndexOf(n);
+           });
+           endNodes = endNodes.filter(function (n) {
+             return endNodes.indexOf(n) === endNodes.lastIndexOf(n);
+           }); // Choose the initial endpoint to start from
 
-             var extent = geoExtent(loc).padByMeters(200);
+           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
 
-             _nominatimCache.insert(Object.assign(extent.bbox(), {
-               data: result
-             }));
+           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 (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];
 
-             if (result && result.error) {
-               throw new Error(result.error);
+           while (remainingWays.length) {
+             nextWay = getNextWay(currNode, remainingWays);
+             remainingWays = utilArrayDifference(remainingWays, [nextWay]);
+
+             if (nextWay[0] !== currNode) {
+               nextWay.reverse();
              }
 
-             if (callback) callback(null, result);
-           })["catch"](function (err) {
-             delete _inflight[url];
-             if (err.name === 'AbortError') return;
-             if (callback) callback(err.message);
+             nodes = nodes.concat(nextWay);
+             currNode = nodes[nodes.length - 1];
+           } // If user selected 2 nodes to straighten between, then slice nodes array to those nodes
+
+
+           if (selectedNodes.length === 2) {
+             var startNodeIdx = nodes.indexOf(selectedNodes[0]);
+             var endNodeIdx = nodes.indexOf(selectedNodes[1]);
+             var sortedStartEnd = [startNodeIdx, endNodeIdx];
+             sortedStartEnd.sort(function (a, b) {
+               return a - b;
+             });
+             nodes = nodes.slice(sortedStartEnd[0], sortedStartEnd[1] + 1);
+           }
+
+           return nodes.map(function (n) {
+             return graph.entity(n);
            });
          }
-       };
-
-       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;
+         function shouldKeepNode(node, graph) {
+           return graph.parentWays(node).length > 1 || graph.parentRelations(node).length || node.hasInterestingTags();
+         }
 
-       var _oscSelectedImage;
+         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;
 
-       var _loadViewerPromise$1;
+           for (i = 1; i < points.length - 1; i++) {
+             var node = nodes[i];
+             var point = points[i];
 
-       function abortRequest$4(controller) {
-         controller.abort();
-       }
+             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 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;
-       }
+           for (i = 0; i < toDelete.length; i++) {
+             graph = actionDeleteNode(toDelete[i].id)(graph);
+           }
 
-       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
+           return graph;
+         };
 
-         var cache = _oscCache[which];
-         Object.keys(cache.inflight).forEach(function (k) {
-           var wanted = tiles.find(function (tile) {
-             return k.indexOf(tile.id + ',') === 0;
+         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 (!wanted) {
-             abortRequest$4(cache.inflight[k]);
-             delete cache.inflight[k];
+           if (threshold === 0) {
+             return 'too_bendy';
            }
-         });
-         tiles.forEach(function (tile) {
-           loadNextTilePage$1(which, currZoom, url, tile);
-         });
-       }
 
-       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'
+           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
+
+             if (isNaN(dist) || dist > threshold) {
+               return 'too_bendy';
+             } else if (dist > maxDistance) {
+               maxDistance = dist;
+             }
            }
-         };
-         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');
+           var keepingAllNodes = nodes.every(function (node, i) {
+             return i === 0 || i === nodes.length - 1 || shouldKeepNode(node, graph);
+           });
+
+           if (maxDistance < 0.0001 && // Allow straightening even if already straight in order to remove extraneous nodes
+           keepingAllNodes) {
+             return 'straight_enough';
            }
+         };
 
-           var features = data.currentPageItems.map(function (item) {
-             var loc = [+item.lng, +item.lat];
-             var d;
+         action.transitionable = true;
+         return action;
+       }
 
-             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
+       //
+       // `turn` must be an `osmTurn` object with a `restrictionID` property.
+       // see osm/intersection.js, pathToTurn()
+       //
 
-               var seq = _oscCache.sequences[d.sequence_id];
+       function actionUnrestrictTurn(turn) {
+         return function (graph) {
+           return actionDeleteRelation(turn.restrictionID)(graph);
+         };
+       }
 
-               if (!seq) {
-                 seq = {
-                   rotation: 0,
-                   images: []
-                 };
-                 _oscCache.sequences[d.sequence_id] = seq;
-               }
+       /* Reflect the given area around its axis of symmetry */
 
-               seq.images[d.sequence_index] = d;
-               _oscCache.images.forImageKey[d.key] = d; // cache imageKey -> image
-             }
+       function actionReflect(reflectIds, projection) {
+         var _useLongAxis = true;
 
-             return {
-               minX: loc[0],
-               minY: loc[1],
-               maxX: loc[0],
-               maxY: loc[1],
-               data: d
-             };
+         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);
            });
-           cache.rtree.load(features);
+           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.
 
-           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 p1 = [(ssr.poly[0][0] + ssr.poly[1][0]) / 2, (ssr.poly[0][1] + ssr.poly[1][1]) / 2];
+           var q1 = [(ssr.poly[2][0] + ssr.poly[3][0]) / 2, (ssr.poly[2][1] + ssr.poly[3][1]) / 2];
+           var p2 = [(ssr.poly[3][0] + ssr.poly[4][0]) / 2, (ssr.poly[3][1] + ssr.poly[4][1]) / 2];
+           var q2 = [(ssr.poly[1][0] + ssr.poly[2][0]) / 2, (ssr.poly[1][1] + ssr.poly[2][1]) / 2];
+           var p, q;
+           var isLong = geoVecLength(p1, q1) > geoVecLength(p2, q2);
 
-           if (which === 'images') {
-             dispatch$5.call('loadedImages');
-           }
-         })["catch"](function () {
-           cache.loaded[id] = true;
-           delete cache.inflight[id];
-         });
-       } // partition viewport into higher zoom tiles
+           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 partitionViewport$1(projection) {
-         var z = geoScaleToZoom(projection.scale());
-         var z2 = Math.ceil(z * 2) / 2 + 2.5; // round to next 0.5 and add 2.5
+           var 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 tiler = utilTiler().zoomExtent([z2, z2]);
-         return tiler.getTiles(projection).map(function (tile) {
-           return tile.extent;
-         });
-       } // no more than `limit` results per partition.
+           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;
+         };
 
-       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;
-         }, []);
+         action.useLongAxis = function (val) {
+           if (!arguments.length) return _useLongAxis;
+           _useLongAxis = val;
+           return action;
+         };
+
+         action.transitionable = true;
+         return action;
        }
 
-       var serviceOpenstreetcam = {
-         init: function init() {
-           if (!_oscCache) {
-             this.reset();
-           }
+       function actionUpgradeTags(entityId, oldTags, replaceTags) {
+         return function (graph) {
+           var entity = graph.entity(entityId);
+           var tags = Object.assign({}, entity.tags); // shallow copy
 
-           this.event = utilRebind(this, dispatch$5, 'on');
-         },
-         reset: function reset() {
-           if (_oscCache) {
-             Object.values(_oscCache.images.inflight).forEach(abortRequest$4);
-           }
+           var transferValue;
+           var semiIndex;
 
-           _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
+           for (var oldTagKey in oldTags) {
+             if (!(oldTagKey in tags)) continue; // wildcard match
 
-           _oscCache.images.rtree.search(bbox).forEach(function (d) {
-             sequenceKeys[d.data.sequence_id] = true;
-           }); // make linestrings from those sequences
+             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 (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 lineStrings = [];
-           Object.keys(sequenceKeys).forEach(function (sequenceKey) {
-             var seq = _oscCache.sequences[sequenceKey];
-             var images = seq && seq.images;
+                 vals.splice(oldIndex, 1);
+                 tags[oldTagKey] = vals.join(';');
+               }
+             }
+           }
 
-             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
+           if (replaceTags) {
+             for (var replaceKey in replaceTags) {
+               var replaceValue = replaceTags[replaceKey];
+
+               if (replaceValue === '*') {
+                 if (tags[replaceKey] && tags[replaceKey] !== 'no') {
+                   // allow any pre-existing value except `no` (troll tag)
+                   continue;
+                 } else {
+                   // otherwise assume `yes` is okay
+                   tags[replaceKey] = 'yes';
                  }
-               });
+               } else if (replaceValue === '$1') {
+                 tags[replaceKey] = transferValue;
+               } else {
+                 if (tags[replaceKey] && oldTags[replaceKey] && semiIndex !== undefined) {
+                   // don't override preexisting values
+                   var existingVals = tags[replaceKey].split(';').filter(Boolean);
+
+                   if (existingVals.indexOf(replaceValue) === -1) {
+                     existingVals.splice(semiIndex, 0, replaceValue);
+                     tags[replaceKey] = existingVals.join(';');
+                   }
+                 } else {
+                   tags[replaceKey] = replaceValue;
+                 }
+               }
              }
-           });
-           return 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
+           }
 
-           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
+           return graph.replace(entity.update({
+             tags: tags
+           }));
+         };
+       }
 
-           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);
-           });
+       function behaviorEdit(context) {
+         function behavior() {
+           context.map().minzoom(context.minEditableZoom());
+         }
 
-           function zoomPan(d3_event) {
-             var t = d3_event.transform;
-             context.container().select('.photoviewer .osc-image-wrap').call(utilSetTransform, t.x, t.y, t.k);
-           }
+         behavior.off = function () {
+           context.map().minzoom(0);
+         };
 
-           function rotate(deg) {
-             return function () {
-               if (!_oscSelectedImage) return;
-               var sequenceKey = _oscSelectedImage.sequence_id;
-               var sequence = _oscCache.sequences[sequenceKey];
-               if (!sequence) return;
-               var r = sequence.rotation || 0;
-               r += deg;
-               if (r > 180) r -= 360;
-               if (r < -180) r += 360;
-               sequence.rotation = r;
-               var wrap = context.container().select('.photoviewer .osc-wrapper');
-               wrap.transition().duration(100).call(imgZoom.transform, identity$2);
-               wrap.selectAll('.osc-image').transition().duration(100).style('transform', 'rotate(' + r + 'deg)');
-             };
-           }
+         return behavior;
+       }
 
-           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
+       /*
+          The hover behavior adds the `.hover` class on pointerover to all elements to which
+          the identical datum is bound, and removes it on pointerout.
 
+          The :hover pseudo-class is insufficient for iD's purposes because a datum's visual
+          representation may consist of several elements scattered throughout the DOM hierarchy.
+          Only one of these elements can have the :hover pseudo-class, but all of them will
+          have the .hover class.
+        */
 
-           _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 behaviorHover(context) {
+         var dispatch = dispatch$8('hover');
 
-           if (isHidden) {
-             viewer.selectAll('.photo-wrapper:not(.osc-wrapper)').classed('hide', true);
-             viewer.selectAll('.photo-wrapper.osc-wrapper').classed('hide', false);
-           }
+         var _selection = select(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();
+         var _newNodeId = null;
+         var _initialNodeID = null;
 
-           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)');
+         var _altDisables;
 
-             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('|');
-             }
+         var _ignoreVertex;
 
-             if (d.captured_at) {
-               attribution.append('span').attr('class', 'captured_at').html(localeDateString(d.captured_at));
-               attribution.append('span').html('|');
-             }
+         var _targets = []; // use pointer events on supported platforms; fallback to mouse events
 
-             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');
-           }
+         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-           return this;
+         function keydown(d3_event) {
+           if (_altDisables && d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
+             _selection.selectAll('.hover').classed('hover-suppressed', true).classed('hover', false);
 
-           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);
+             _selection.classed('hover-disabled', true);
+
+             dispatch.call('hover', this, null);
            }
+         }
 
-           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
+         function keyup(d3_event) {
+           if (_altDisables && d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
+             _selection.selectAll('.hover-suppressed').classed('hover-suppressed', false).classed('hover', true);
 
-           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
+             _selection.classed('hover-disabled', false);
 
-           context.container().selectAll('.viewfield-group .viewfield').attr('d', viewfieldPath);
+             dispatch.call('hover', this, _targets);
+           }
+         }
 
-           function viewfieldPath() {
-             var d = this.parentNode.__data__;
+         function behavior(selection) {
+           _selection = selection;
+           _targets = [];
 
-             if (d.pano && d.key !== selectedImageKey) {
-               return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
-             } else {
-               return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
-             }
+           if (_initialNodeID) {
+             _newNodeId = _initialNodeID;
+             _initialNodeID = null;
+           } else {
+             _newNodeId = null;
            }
 
-           return this;
-         },
-         updateUrlImage: function updateUrlImage(imageKey) {
-           if (!window.mocha) {
-             var hash = utilStringQs(window.location.hash);
+           _selection.on(_pointerPrefix + 'over.hover', pointerover).on(_pointerPrefix + 'out.hover', pointerout) // treat pointerdown as pointerover for touch devices
+           .on(_pointerPrefix + 'down.hover', pointerover);
 
-             if (imageKey) {
-               hash.photo = 'openstreetcam/' + imageKey;
-             } else {
-               delete hash.photo;
-             }
+           select(window).on(_pointerPrefix + 'up.hover pointercancel.hover', pointerout, true).on('keydown.hover', keydown).on('keyup.hover', keyup);
 
-             window.location.replace('#' + utilQsString(hash, true));
-           }
-         },
-         cache: function cache() {
-           return _oscCache;
-         }
-       };
+           function eventTarget(d3_event) {
+             var datum = d3_event.target && d3_event.target.__data__;
+             if (_typeof(datum) !== 'object') return null;
 
-       var FORCED$f = fails(function () {
-         return new Date(NaN).toJSON() !== null
-           || Date.prototype.toJSON.call({ toISOString: function () { return 1; } }) !== 1;
-       });
+             if (!(datum instanceof osmEntity) && datum.properties && datum.properties.entity instanceof osmEntity) {
+               return datum.properties.entity;
+             }
 
-       // `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 datum;
+           }
 
-       // `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);
-         }
-       });
+           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);
 
-       /**
-        * 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 (target && _targets.indexOf(target) === -1) {
+               _targets.push(target);
 
-         return value != null && (type == 'object' || type == 'function');
-       }
+               updateHover(d3_event, _targets);
+             }
+           }
 
-       /** Detect free variable `global` from Node.js. */
-       var freeGlobal = (typeof global === "undefined" ? "undefined" : _typeof(global)) == 'object' && global && global.Object === Object && global;
+           function pointerout(d3_event) {
+             var target = eventTarget(d3_event);
 
-       /** Detect free variable `self`. */
+             var index = _targets.indexOf(target);
 
-       var freeSelf = (typeof self === "undefined" ? "undefined" : _typeof(self)) == 'object' && self && self.Object === Object && self;
-       /** Used as a reference to the global object. */
+             if (index !== -1) {
+               _targets.splice(index);
 
-       var root$1 = freeGlobal || freeSelf || Function('return this')();
+               updateHover(d3_event, _targets);
+             }
+           }
 
-       /**
-        * 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.
-        */
+           function allowsVertex(d) {
+             return d.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(d, context.graph());
+           }
 
-       var now$1 = function now() {
-         return root$1.Date.now();
-       };
+           function modeAllowsHover(target) {
+             var mode = context.mode();
 
-       /** Built-in value references. */
+             if (mode.id === 'add-point') {
+               return mode.preset.matchGeometry('vertex') || target.type !== 'way' && target.geometry(context.graph()) !== 'vertex';
+             }
 
-       var _Symbol = root$1.Symbol;
+             return true;
+           }
 
-       /** Used for built-in method references. */
+           function updateHover(d3_event, targets) {
+             _selection.selectAll('.hover').classed('hover', false);
 
-       var objectProto = Object.prototype;
-       /** Used to check objects for own properties. */
+             _selection.selectAll('.hover-suppressed').classed('hover-suppressed', false);
 
-       var hasOwnProperty$1 = objectProto.hasOwnProperty;
-       /**
-        * Used to resolve the
-        * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
-        * of values.
-        */
+             var mode = context.mode();
 
-       var nativeObjectToString = objectProto.toString;
-       /** Built-in value references. */
+             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;
+             }
 
-       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`.
-        */
+             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 getRawTag(value) {
-         var isOwn = hasOwnProperty$1.call(value, symToStringTag),
-             tag = value[symToStringTag];
+               return true;
+             });
+             var selector = '';
 
-         try {
-           value[symToStringTag] = undefined;
-           var unmasked = true;
-         } catch (e) {}
+             for (var i in targets) {
+               var datum = targets[i]; // What are we hovering over?
 
-         var result = nativeObjectToString.call(value);
+               if (datum.__featurehash__) {
+                 // hovering custom data
+                 selector += ', .data' + datum.__featurehash__;
+               } else if (datum instanceof QAItem) {
+                 selector += ', .' + datum.service + '.itemId-' + datum.id;
+               } else if (datum instanceof osmNote) {
+                 selector += ', .note-' + datum.id;
+               } else if (datum instanceof osmEntity) {
+                 selector += ', .' + datum.id;
 
-         if (unmasked) {
-           if (isOwn) {
-             value[symToStringTag] = tag;
-           } else {
-             delete value[symToStringTag];
-           }
-         }
+                 if (datum.type === 'relation') {
+                   for (var j in datum.members) {
+                     selector += ', .' + datum.members[j].id;
+                   }
+                 }
+               }
+             }
 
-         return result;
-       }
+             var suppressed = _altDisables && d3_event && d3_event.altKey;
 
-       /** 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.
-        */
+             if (selector.trim().length) {
+               // remove the first comma
+               selector = selector.slice(1);
 
-       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.
-        */
+               _selection.selectAll(selector).classed(suppressed ? 'hover-suppressed' : 'hover', true);
+             }
 
-       function objectToString$1(value) {
-         return nativeObjectToString$1.call(value);
-       }
+             dispatch.call('hover', this, !suppressed && targets);
+           }
+         }
 
-       /** `Object#toString` result references. */
+         behavior.off = function (selection) {
+           selection.selectAll('.hover').classed('hover', false);
+           selection.selectAll('.hover-suppressed').classed('hover-suppressed', false);
+           selection.classed('hover-disabled', false);
+           selection.on(_pointerPrefix + 'over.hover', null).on(_pointerPrefix + 'out.hover', null).on(_pointerPrefix + 'down.hover', null);
+           select(window).on(_pointerPrefix + 'up.hover pointercancel.hover', null, true).on('keydown.hover', null).on('keyup.hover', null);
+         };
 
-       var nullTag = '[object Null]',
-           undefinedTag = '[object Undefined]';
-       /** Built-in value references. */
+         behavior.altDisables = function (val) {
+           if (!arguments.length) return _altDisables;
+           _altDisables = val;
+           return behavior;
+         };
 
-       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`.
-        */
+         behavior.ignoreVertex = function (val) {
+           if (!arguments.length) return _ignoreVertex;
+           _ignoreVertex = val;
+           return behavior;
+         };
 
-       function baseGetTag(value) {
-         if (value == null) {
-           return value === undefined ? undefinedTag : nullTag;
-         }
+         behavior.initialNodeID = function (nodeId) {
+           _initialNodeID = nodeId;
+           return behavior;
+         };
 
-         return symToStringTag$1 && symToStringTag$1 in Object(value) ? getRawTag(value) : objectToString$1(value);
+         return utilRebind(behavior, dispatch, 'on');
        }
 
-       /**
-        * Checks if `value` is object-like. A value is object-like if it's not `null`
-        * and has a `typeof` result of "object".
-        *
-        * @static
-        * @memberOf _
-        * @since 4.0.0
-        * @category Lang
-        * @param {*} value The value to check.
-        * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
-        * @example
-        *
-        * _.isObjectLike({});
-        * // => true
-        *
-        * _.isObjectLike([1, 2, 3]);
-        * // => true
-        *
-        * _.isObjectLike(_.noop);
-        * // => false
-        *
-        * _.isObjectLike(null);
-        * // => false
-        */
-       function isObjectLike(value) {
-         return value != null && _typeof(value) == 'object';
-       }
+       var _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');
 
-       /** `Object#toString` result references. */
+         var _hover = behaviorHover(context).altDisables(true).ignoreVertex(true).on('hover', context.ui().sidebar.hover);
 
-       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
-        */
+         var _edit = behaviorEdit(context);
 
-       function isSymbol$1(value) {
-         return _typeof(value) == 'symbol' || isObjectLike(value) && baseGetTag(value) == symbolTag;
-       }
+         var _closeTolerance = 4;
+         var _tolerance = 12;
+         var _mouseLeave = false;
+         var _lastMouse = null;
 
-       /** Used as references for various `Number` constants. */
+         var _lastPointerUpEvent;
 
-       var NAN = 0 / 0;
-       /** Used to match leading and trailing whitespace. */
+         var _downPointer; // use pointer events on supported platforms; fallback to mouse events
 
-       var reTrim = /^\s+|\s+$/g;
-       /** Used to detect bad signed hexadecimal string values. */
 
-       var reIsBadHex = /^[-+]0x[0-9a-f]+$/i;
-       /** Used to detect binary string values. */
+         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse'; // related code
+         // - `mode/drag_node.js` `datum()`
 
-       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`. */
+         function datum(d3_event) {
+           var mode = context.mode();
+           var isNote = mode && mode.id.indexOf('note') !== -1;
+           if (d3_event.altKey || isNote) return {};
+           var element;
 
-       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
-        */
+           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 toNumber$1(value) {
-         if (typeof value == 'number') {
-           return value;
-         }
 
-         if (isSymbol$1(value)) {
-           return NAN;
+           var d = element.__data__;
+           return d && d.properties && d.properties.target ? d : {};
          }
 
-         if (isObject$1(value)) {
-           var other = typeof value.valueOf == 'function' ? value.valueOf() : value;
-           value = isObject$1(other) ? other + '' : other;
+         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 (typeof value != 'string') {
-           return value === 0 ? value : +value;
-         }
+         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);
 
-         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;
-       }
+           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);
+           }
+         }
 
-       /** Error message constants. */
+         function pointermove(d3_event) {
+           if (_downPointer && _downPointer.id === (d3_event.pointerId || 'mouse') && !_downPointer.isCancelled) {
+             var p2 = _downPointer.pointerLocGetter(d3_event);
 
-       var FUNC_ERROR_TEXT = 'Expected a function';
-       /* Built-in method references for those with the same name as other `lodash` methods. */
+             var dist = geoVecLength(_downPointer.downLoc, p2);
 
-       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);
-        */
+             if (dist >= _closeTolerance) {
+               _downPointer.isCancelled = true;
+               dispatch.call('downcancel', this);
+             }
+           }
 
-       function debounce(func, wait, options) {
-         var lastArgs,
-             lastThis,
-             maxWait,
-             result,
-             timerId,
-             lastCallTime,
-             lastInvokeTime = 0,
-             leading = false,
-             maxing = false,
-             trailing = true;
+           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 (typeof func != 'function') {
-           throw new TypeError(FUNC_ERROR_TEXT);
+           if (_lastPointerUpEvent && _lastPointerUpEvent.pointerType !== 'mouse' && d3_event.timeStamp - _lastPointerUpEvent.timeStamp < 100) return;
+           _lastMouse = d3_event;
+           dispatch.call('move', this, d3_event, datum(d3_event));
          }
 
-         wait = toNumber$1(wait) || 0;
+         function pointercancel(d3_event) {
+           if (_downPointer && _downPointer.id === (d3_event.pointerId || 'mouse')) {
+             if (!_downPointer.isCancelled) {
+               dispatch.call('downcancel', this);
+             }
 
-         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;
+             _downPointer = null;
+           }
          }
 
-         function invokeFunc(time) {
-           var args = lastArgs,
-               thisArg = lastThis;
-           lastArgs = lastThis = undefined;
-           lastInvokeTime = time;
-           result = func.apply(thisArg, args);
-           return result;
+         function mouseenter() {
+           _mouseLeave = false;
          }
 
-         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 mouseleave() {
+           _mouseLeave = true;
          }
 
-         function remainingWait(time) {
-           var timeSinceLastCall = time - lastCallTime,
-               timeSinceLastInvoke = time - lastInvokeTime,
-               timeWaiting = wait - timeSinceLastCall;
-           return maxing ? nativeMin(timeWaiting, maxWait - timeSinceLastInvoke) : timeWaiting;
-         }
+         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 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 click(d3_event, loc) {
+           var d = datum(d3_event);
+           var target = d && d.properties && d.properties.entity;
+           var mode = context.mode();
 
-         function timerExpired() {
-           var time = now$1();
+           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 (shouldInvoke(time)) {
-             return trailingEdge(time);
-           } // Restart the timer.
+             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
 
 
-           timerId = setTimeout(timerExpired, remainingWait(time));
-         }
+         function space(d3_event) {
+           d3_event.preventDefault();
+           d3_event.stopPropagation();
+           var currSpace = context.map().mouse();
 
-         function trailingEdge(time) {
-           timerId = undefined; // Only invoke if we have `lastArgs` which means `func` has been
-           // debounced at least once.
+           if (_disableSpace && _lastSpace) {
+             var dist = geoVecLength(_lastSpace, currSpace);
 
-           if (trailing && lastArgs) {
-             return invokeFunc(time);
+             if (dist > _tolerance) {
+               _disableSpace = false;
+             }
            }
 
-           lastArgs = lastThis = undefined;
-           return result;
-         }
+           if (_disableSpace || _mouseLeave || !_lastMouse) return; // user must move mouse or release space bar to allow another click
 
-         function cancel() {
-           if (timerId !== undefined) {
-             clearTimeout(timerId);
-           }
+           _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
 
-           lastInvokeTime = 0;
-           lastArgs = lastCallTime = lastThis = timerId = undefined;
+           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);
          }
 
-         function flush() {
-           return timerId === undefined ? result : trailingEdge(now$1());
+         function backspace(d3_event) {
+           d3_event.preventDefault();
+           dispatch.call('undo');
          }
 
-         function debounced() {
-           var time = now$1(),
-               isInvoking = shouldInvoke(time);
-           lastArgs = arguments;
-           lastThis = this;
-           lastCallTime = time;
+         function del(d3_event) {
+           d3_event.preventDefault();
+           dispatch.call('cancel');
+         }
 
-           if (isInvoking) {
-             if (timerId === undefined) {
-               return leadingEdge(lastCallTime);
-             }
+         function ret(d3_event) {
+           d3_event.preventDefault();
+           dispatch.call('finish');
+         }
 
-             if (maxing) {
-               // Handle invocations in a tight loop.
-               clearTimeout(timerId);
-               timerId = setTimeout(timerExpired, wait);
-               return invokeFunc(lastCallTime);
-             }
-           }
+         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;
+         }
 
-           if (timerId === undefined) {
-             timerId = setTimeout(timerExpired, wait);
-           }
+         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
 
-           return result;
-         }
+           select(document).call(keybinding.unbind);
+         };
 
-         debounced.cancel = cancel;
-         debounced.flush = flush;
-         return debounced;
+         behavior.hover = function () {
+           return _hover;
+         };
+
+         return utilRebind(behavior, dispatch, 'on');
        }
 
-       /** Error message constants. */
+       function initRange(domain, range) {
+         switch (arguments.length) {
+           case 0:
+             break;
 
-       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);
-        */
+           case 1:
+             this.range(domain);
+             break;
+
+           default:
+             this.range(range).domain(domain);
+             break;
+         }
 
-       function throttle(func, wait, options) {
-         var leading = true,
-             trailing = true;
+         return this;
+       }
 
-         if (typeof func != 'function') {
-           throw new TypeError(FUNC_ERROR_TEXT$1);
+       function constants(x) {
+         return function () {
+           return x;
+         };
+       }
+
+       function number(x) {
+         return +x;
+       }
+
+       var unit = [0, 1];
+       function identity$1(x) {
+         return x;
+       }
+
+       function normalize(a, b) {
+         return (b -= a = +a) ? function (x) {
+           return (x - a) / b;
+         } : constants(isNaN(b) ? NaN : 0.5);
+       }
+
+       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].
+
+
+       function bimap(domain, range, interpolate) {
+         var d0 = domain[0],
+             d1 = domain[1],
+             r0 = range[0],
+             r1 = range[1];
+         if (d1 < d0) d0 = normalize(d1, d0), r0 = interpolate(r1, r0);else d0 = normalize(d0, d1), r0 = interpolate(r0, r1);
+         return function (x) {
+           return r0(d0(x));
+         };
+       }
+
+       function polymap(domain, range, interpolate) {
+         var j = Math.min(domain.length, range.length) - 1,
+             d = new Array(j),
+             r = new Array(j),
+             i = -1; // Reverse descending domains.
+
+         if (domain[j] < domain[0]) {
+           domain = domain.slice().reverse();
+           range = range.slice().reverse();
          }
 
-         if (isObject$1(options)) {
-           leading = 'leading' in options ? !!options.leading : leading;
-           trailing = 'trailing' in options ? !!options.trailing : trailing;
+         while (++i < j) {
+           d[i] = normalize(domain[i], domain[i + 1]);
+           r[i] = interpolate(range[i], range[i + 1]);
          }
 
-         return debounce(func, wait, {
-           'leading': leading,
-           'maxWait': wait,
-           'trailing': trailing
-         });
+         return function (x) {
+           var i = bisectRight(domain, x, 1, j) - 1;
+           return r[i](d[i](x));
+         };
        }
 
-       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 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;
 
-           function utf8Encode(str) {
-             var x,
-                 y,
-                 output = '',
-                 i = -1,
-                 l;
+         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;
+         }
 
-             if (str && str.length) {
-               l = str.length;
+         function scale(x) {
+           return x == null || isNaN(x = +x) ? unknown : (output || (output = piecewise(domain.map(transform), range, interpolate)))(transform(clamp(x)));
+         }
 
-               while ((i += 1) < l) {
-                 /* Decode utf-16 surrogate pairs */
-                 x = str.charCodeAt(i);
-                 y = i + 1 < l ? str.charCodeAt(i + 1) : 0;
+         scale.invert = function (y) {
+           return clamp(untransform((input || (input = piecewise(range, domain.map(transform), d3_interpolateNumber)))(y)));
+         };
 
-                 if (0xD800 <= x && x <= 0xDBFF && 0xDC00 <= y && y <= 0xDFFF) {
-                   x = 0x10000 + ((x & 0x03FF) << 10) + (y & 0x03FF);
-                   i += 1;
-                 }
-                 /* Encode output as utf-8 */
+         scale.domain = function (_) {
+           return arguments.length ? (domain = Array.from(_, number), rescale()) : domain.slice();
+         };
 
+         scale.range = function (_) {
+           return arguments.length ? (range = Array.from(_), rescale()) : range.slice();
+         };
 
-                 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);
-                 }
-               }
-             }
+         scale.rangeRound = function (_) {
+           return range = Array.from(_), interpolate = interpolateRound, rescale();
+         };
 
-             return output;
-           }
+         scale.clamp = function (_) {
+           return arguments.length ? (clamp = _ ? true : identity$1, rescale()) : clamp !== identity$1;
+         };
 
-           function utf8Decode(str) {
-             var i,
-                 ac,
-                 c1,
-                 c2,
-                 c3,
-                 arr = [],
-                 l;
-             i = ac = c1 = c2 = c3 = 0;
+         scale.interpolate = function (_) {
+           return arguments.length ? (interpolate = _, rescale()) : interpolate;
+         };
 
-             if (str && str.length) {
-               l = str.length;
-               str += '';
+         scale.unknown = function (_) {
+           return arguments.length ? (unknown = _, scale) : unknown;
+         };
 
-               while (i < l) {
-                 c1 = str.charCodeAt(i);
-                 ac += 1;
+         return function (t, u) {
+           transform = t, untransform = u;
+           return rescale();
+         };
+       }
+       function continuous() {
+         return transformer()(identity$1, identity$1);
+       }
 
-                 if (c1 < 128) {
-                   arr[ac] = String.fromCharCode(c1);
-                   i += 1;
-                 } else if (c1 > 191 && c1 < 224) {
-                   c2 = str.charCodeAt(i + 1);
-                   arr[ac] = String.fromCharCode((c1 & 31) << 6 | c2 & 63);
-                   i += 2;
-                 } else {
-                   c2 = str.charCodeAt(i + 1);
-                   c3 = str.charCodeAt(i + 2);
-                   arr[ac] = String.fromCharCode((c1 & 15) << 12 | (c2 & 63) << 6 | c3 & 63);
-                   i += 3;
-                 }
-               }
-             }
+       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].
 
-             return arr.join('');
-           }
-           /**
-            * Add integers, wrapping at 2^32. This uses 16-bit operations internally
-            * to work around bugs in some JS interpreters.
-            */
+       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).
 
-           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.
-            */
+         return [coefficient.length > 1 ? coefficient[0] + coefficient.slice(2) : coefficient, +x.slice(i + 1)];
+       }
+
+       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;
 
-           function bit_rol(num, cnt) {
-             return num << cnt | num >>> 32 - cnt;
+           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];
            }
-           /**
-            * Convert a raw string to a hex string
-            */
 
+           return t.reverse().join(thousands);
+         };
+       }
 
-           function rstr2hex(input, hexcase) {
-             var hex_tab = hexcase ? '0123456789ABCDEF' : '0123456789abcdef',
-                 output = '',
-                 x,
-                 i = 0,
-                 l = input.length;
+       function formatNumerals (numerals) {
+         return function (value) {
+           return value.replace(/[0-9]/g, function (i) {
+             return numerals[+i];
+           });
+         };
+       }
 
-             for (; i < l; i += 1) {
-               x = input.charCodeAt(i);
-               output += hex_tab.charAt(x >>> 4 & 0x0F) + hex_tab.charAt(x & 0x0F);
-             }
+       // [[fill]align][sign][symbol][0][width][,][.precision][~][type]
+       var re = /^(?:(.)?([<>=^]))?([+\-( ])?([$#])?(0)?(\d+)?(,)?(\.\d+)?(~)?([a-z%])?$/i;
+       function formatSpecifier(specifier) {
+         if (!(match = re.exec(specifier))) throw new Error("invalid format: " + specifier);
+         var match;
+         return new FormatSpecifier({
+           fill: match[1],
+           align: match[2],
+           sign: match[3],
+           symbol: match[4],
+           zero: match[5],
+           width: match[6],
+           comma: match[7],
+           precision: match[8] && match[8].slice(1),
+           trim: match[9],
+           type: match[10]
+         });
+       }
+       formatSpecifier.prototype = FormatSpecifier.prototype; // instanceof
 
-             return output;
-           }
-           /**
-            * Convert an array of big-endian words to a string
-            */
+       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 binb2rstr(input) {
-             var i,
-                 l = input.length * 32,
-                 output = '';
+       // 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;
 
-             for (i = 0; i < l; i += 8) {
-               output += String.fromCharCode(input[i >> 5] >>> 24 - i % 32 & 0xFF);
-             }
+             case "0":
+               if (i0 === 0) i0 = i;
+               i1 = i;
+               break;
 
-             return output;
+             default:
+               if (!+s[i]) break out;
+               if (i0 > 0) i0 = 0;
+               break;
            }
-           /**
-            * Convert an array of little-endian words to a string
-            */
+         }
 
+         return i0 > 0 ? s.slice(0, i0) + s.slice(i1 + 1) : s;
+       }
 
-           function binl2rstr(input) {
-             var i,
-                 l = input.length * 32,
-                 output = '';
+       var nativeToPrecision = 1.0.toPrecision;
 
-             for (i = 0; i < l; i += 8) {
-               output += String.fromCharCode(input[i >> 5] >>> i % 32 & 0xFF);
-             }
+       var FORCED$1 = fails(function () {
+         // IE7-
+         return nativeToPrecision.call(1, undefined) !== '1';
+       }) || !fails(function () {
+         // V8 ~ Android 4.3-
+         nativeToPrecision.call({});
+       });
 
-             return output;
-           }
-           /**
-            * Convert a raw string to an array of little-endian words
-            * Characters >255 have their high-byte silently ignored.
-            */
+       // `Number.prototype.toPrecision` method
+       // https://tc39.es/ecma262/#sec-number.prototype.toprecision
+       _export({ target: 'Number', proto: true, forced: FORCED$1 }, {
+         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 rstr2binl(input) {
-             var i,
-                 l = input.length * 8,
-                 output = Array(input.length >> 2),
-                 lo = output.length;
+       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");
+       }
 
-             for (i = 0; i < lo; i += 1) {
-               output[i] = 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);
+         }
+       };
 
-             for (i = 0; i < l; i += 8) {
-               output[i >> 5] |= (input.charCodeAt(i / 8) & 0xFF) << i % 32;
-             }
+       function identity (x) {
+         return x;
+       }
 
-             return output;
-           }
-           /**
-            * Convert a raw string to an array of big-endian words
-            * Characters >255 have their high-byte silently ignored.
-            */
+       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 + "";
 
+         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".
 
-           function rstr2binb(input) {
-             var i,
-                 l = input.length * 8,
-                 output = Array(input.length >> 2),
-                 lo = output.length;
+           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.
 
-             for (i = 0; i < lo; i += 1) {
-               output[i] = 0;
-             }
+           if (zero || fill === "0" && align === "=") zero = true, fill = "0", align = "="; // Compute the prefix and suffix.
+           // For SI-prefix, the suffix is lazily computed.
 
-             for (i = 0; i < l; i += 8) {
-               output[i >> 5] |= (input.charCodeAt(i / 8) & 0xFF) << 24 - i % 32;
-             }
+           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?
 
-             return output;
-           }
-           /**
-            * Convert a raw string to an arbitrary string encoding
-            */
+           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].
 
+           precision = precision === undefined ? 6 : /[gprs]/.test(type) ? Math.max(1, Math.min(21, precision)) : Math.max(0, Math.min(20, precision));
 
-           function rstr2any(input, encoding) {
-             var divisor = encoding.length,
-                 remainders = Array(),
+           function format(value) {
+             var valuePrefix = prefix,
+                 valueSuffix = suffix,
                  i,
-                 q,
-                 x,
-                 ld,
-                 quotient,
-                 dividend,
-                 output,
-                 full_length;
-             /* Convert to an array of 16-bit big-endian values, forming the dividend */
+                 n,
+                 c;
 
-             dividend = Array(Math.ceil(input.length / 2));
-             ld = dividend.length;
+             if (type === "c") {
+               valueSuffix = formatType(value) + valueSuffix;
+               value = "";
+             } else {
+               value = +value; // Determine the sign. -0 is not less than 0, but 1 / -0 is!
 
-             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 valueNegative = value < 0 || 1 / value < 0; // Perform the initial formatting.
 
+               value = isNaN(value) ? nan : formatType(Math.abs(value), precision); // Trim insignificant zeros.
 
-             while (dividend.length > 0) {
-               quotient = Array();
-               x = 0;
+               if (trim) value = formatTrim(value); // If a negative value rounds to zero after formatting, and no explicit positive sign is requested, hide the sign.
 
-               for (i = 0; i < dividend.length; i += 1) {
-                 x = (x << 16) + dividend[i];
-                 q = Math.floor(x / divisor);
-                 x -= q * divisor;
+               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.
+
+               if (maybeSuffix) {
+                 i = -1, n = value.length;
 
-                 if (quotient.length > 0 || q > 0) {
-                   quotient[quotient.length] = q;
+                 while (++i < n) {
+                   if (c = value.charCodeAt(i), 48 > c || c > 57) {
+                     valueSuffix = (c === 46 ? decimal + value.slice(i + 1) : value.slice(i)) + valueSuffix;
+                     value = value.slice(0, i);
+                     break;
+                   }
                  }
                }
+             } // If the fill character is not "0", grouping is applied before padding.
 
-               remainders[remainders.length] = x;
-               dividend = quotient;
-             }
-             /* Convert the remainders to the output string */
 
+             if (comma && !zero) value = group(value, Infinity); // Compute the padding.
 
-             output = '';
+             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.
 
-             for (i = remainders.length - 1; i >= 0; i--) {
-               output += encoding.charAt(remainders[i]);
-             }
-             /* Append leading zero equivalents */
+             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;
 
-             full_length = Math.ceil(input.length * 8 / (Math.log(encoding.length) / Math.log(2)));
+               case "=":
+                 value = valuePrefix + padding + value + valueSuffix;
+                 break;
 
-             for (i = output.length; i < full_length; i += 1) {
-               output = encoding[0] + output;
+               case "^":
+                 value = padding.slice(0, length = padding.length >> 1) + valuePrefix + value + valueSuffix + padding.slice(length);
+                 break;
+
+               default:
+                 value = padding + valuePrefix + value + valueSuffix;
+                 break;
              }
 
-             return output;
+             return numerals(value);
            }
-           /**
-            * Convert a raw string to a base-64 string
-            */
-
-
-           function rstr2b64(input, b64pad) {
-             var tab = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/',
-                 output = '',
-                 len = input.length,
-                 i,
-                 j,
-                 triplet;
-             b64pad = b64pad || '=';
 
-             for (i = 0; i < len; i += 3) {
-               triplet = input.charCodeAt(i) << 16 | (i + 1 < len ? input.charCodeAt(i + 1) << 8 : 0) | (i + 2 < len ? input.charCodeAt(i + 2) : 0);
+           format.toString = function () {
+             return specifier + "";
+           };
 
-               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);
-                 }
-               }
-             }
+           return format;
+         }
 
-             return output;
-           }
+         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;
+           };
+         }
 
-           Hashes = {
-             /**
-              * @property {String} version
-              * @readonly
-              */
-             VERSION: '1.0.6',
+         return {
+           format: newFormat,
+           formatPrefix: formatPrefix
+         };
+       }
 
-             /**
-              * @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 locale;
+       var format;
+       var formatPrefix;
+       defaultLocale({
+         thousands: ",",
+         grouping: [3],
+         currency: ["$", ""]
+       });
+       function defaultLocale(definition) {
+         locale = formatLocale(definition);
+         format = locale.format;
+         formatPrefix = locale.formatPrefix;
+         return locale;
+       }
 
-               this.encode = function (input) {
-                 var i,
-                     j,
-                     triplet,
-                     output = '',
-                     len = input.length;
-                 pad = pad || '=';
-                 input = utf8 ? utf8Encode(input) : input;
+       function precisionFixed (step) {
+         return Math.max(0, -exponent(Math.abs(step)));
+       }
 
-                 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);
+       function precisionPrefix (step, value) {
+         return Math.max(0, Math.max(-8, Math.min(8, Math.floor(exponent(value) / 3))) * 3 - exponent(Math.abs(step)));
+       }
 
-                   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 precisionRound (step, max) {
+         step = Math.abs(step), max = Math.abs(max) - step;
+         return Math.max(0, exponent(max) - exponent(step)) + 1;
+       }
 
-                 return output;
-               }; // public method for decoding
+       function tickFormat(start, stop, count, specifier) {
+         var step = tickStep(start, stop, count),
+             precision;
+         specifier = formatSpecifier(specifier == null ? ",f" : specifier);
 
+         switch (specifier.type) {
+           case "s":
+             {
+               var value = Math.max(Math.abs(start), Math.abs(stop));
+               if (specifier.precision == null && !isNaN(precision = precisionPrefix(step, value))) specifier.precision = precision;
+               return formatPrefix(specifier, value);
+             }
 
-               this.decode = function (input) {
-                 // var b64 = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
-                 var i,
-                     o1,
-                     o2,
-                     o3,
-                     h1,
-                     h2,
-                     h3,
-                     h4,
-                     bits,
-                     ac,
-                     dec = '',
-                     arr = [];
+           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 (!input) {
-                   return input;
-                 }
+           case "f":
+           case "%":
+             {
+               if (specifier.precision == null && !isNaN(precision = precisionFixed(step))) specifier.precision = precision - (specifier.type === "%") * 2;
+               break;
+             }
+         }
 
-                 i = ac = 0;
-                 input = input.replace(new RegExp('\\' + pad, 'gi'), ''); // use '='
-                 //input += '';
+         return format(specifier);
+       }
 
-                 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 linearish(scale) {
+         var domain = scale.domain;
 
-                   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);
+         scale.ticks = function (count) {
+           var d = domain();
+           return ticks(d[0], d[d.length - 1], count == null ? 10 : count);
+         };
 
-                 dec = arr.join('');
-                 dec = utf8 ? utf8Decode(dec) : dec;
-                 return dec;
-               }; // set custom pad string
+         scale.tickFormat = function (count, specifier) {
+           var d = domain();
+           return tickFormat(d[0], d[d.length - 1], count == null ? 10 : count, specifier);
+         };
 
+         scale.nice = function (count) {
+           if (count == null) count = 10;
+           var d = domain();
+           var i0 = 0;
+           var i1 = d.length - 1;
+           var start = d[i0];
+           var stop = d[i1];
+           var prestep;
+           var step;
+           var maxIter = 10;
 
-               this.setPad = function (str) {
-                 pad = str || pad;
-                 return this;
-               }; // set custom tab string characters
+           if (stop < start) {
+             step = start, start = stop, stop = step;
+             step = i0, i0 = i1, i1 = step;
+           }
 
+           while (maxIter-- > 0) {
+             step = tickIncrement(start, stop, count);
 
-               this.setTab = function (str) {
-                 tab = str || tab;
-                 return this;
-               };
+             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;
+             }
 
-               this.setUTF8 = function (bool) {
-                 if (typeof bool === 'boolean') {
-                   utf8 = bool;
-                 }
+             prestep = step;
+           }
 
-                 return this;
-               };
-             },
+           return scale;
+         };
 
-             /**
-              * 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;
+         return scale;
+       }
+       function linear() {
+         var scale = continuous();
 
-               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)
+         scale.copy = function () {
+           return copy(scale, linear());
+         };
 
+         initRange.apply(scale, arguments);
+         return linearish(scale);
+       }
 
-               return (crc ^ -1) >>> 0;
-             },
+       // eslint-disable-next-line es/no-math-expm1 -- safe
+       var $expm1 = Math.expm1;
+       var exp$1 = Math.exp;
 
-             /**
-              * @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
+       // `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;
 
-               this.hex = function (s) {
-                 return rstr2hex(rstr(s), hexcase);
-               };
+       function quantize() {
+         var x0 = 0,
+             x1 = 1,
+             n = 1,
+             domain = [0.5],
+             range = [0, 1],
+             unknown;
 
-               this.b64 = function (s) {
-                 return rstr2b64(rstr(s), b64pad);
-               };
+         function scale(x) {
+           return x != null && x <= x ? range[bisectRight(domain, x, 0, n)] : unknown;
+         }
 
-               this.any = function (s, e) {
-                 return rstr2any(rstr(s), e);
-               };
+         function rescale() {
+           var i = -1;
+           domain = new Array(n);
 
-               this.raw = function (s) {
-                 return rstr(s);
-               };
+           while (++i < n) {
+             domain[i] = ((i + 1) * x1 - (i - n) * x0) / (n + 1);
+           }
 
-               this.hex_hmac = function (k, d) {
-                 return rstr2hex(rstr_hmac(k, d), hexcase);
-               };
+           return scale;
+         }
 
-               this.b64_hmac = function (k, d) {
-                 return rstr2b64(rstr_hmac(k, d), b64pad);
-               };
+         scale.domain = function (_) {
+           var _ref, _ref2;
 
-               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
-                */
+           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();
+         };
 
-               this.vm_test = function () {
-                 return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
-               };
-               /**
-                * Enable/disable uppercase hexadecimal returned string
-                * @param {Boolean}
-                * @return {Object} this
-                */
+         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]];
+         };
 
+         scale.unknown = function (_) {
+           return arguments.length ? (unknown = _, scale) : scale;
+         };
 
-               this.setUpperCase = function (a) {
-                 if (typeof a === 'boolean') {
-                   hexcase = a;
-                 }
+         scale.thresholds = function () {
+           return domain.slice();
+         };
 
-                 return this;
-               };
-               /**
-                * Defines a base64 pad string
-                * @param {String} Pad
-                * @return {Object} this
-                */
+         scale.copy = function () {
+           return quantize().domain([x0, x1]).range(range).unknown(unknown);
+         };
 
+         return initRange.apply(linearish(scale), arguments);
+       }
 
-               this.setPad = function (a) {
-                 b64pad = a || b64pad;
-                 return this;
-               };
-               /**
-                * Defines a base64 pad string
-                * @param {Boolean}
-                * @return {Object} [this]
-                */
+       // https://github.com/tc39/proposal-string-pad-start-end
 
 
-               this.setUTF8 = function (a) {
-                 if (typeof a === 'boolean') {
-                   utf8 = a;
-                 }
 
-                 return this;
-               }; // private methods
 
-               /**
-                * Calculate the MD5 of a raw string
-                */
+       var ceil = Math.ceil;
 
+       // `String.prototype.{ padStart, padEnd }` methods implementation
+       var createMethod = 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(fillLen / fillStr.length));
+           if (stringFiller.length > fillLen) stringFiller = stringFiller.slice(0, fillLen);
+           return IS_END ? S + stringFiller : stringFiller + S;
+         };
+       };
 
-               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 stringPad = {
+         // `String.prototype.padStart` method
+         // https://tc39.es/ecma262/#sec-string.prototype.padstart
+         start: createMethod(false),
+         // `String.prototype.padEnd` method
+         // https://tc39.es/ecma262/#sec-string.prototype.padend
+         end: createMethod(true)
+       };
 
+       var padStart = stringPad.start;
 
-               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 abs$1 = Math.abs;
+       var DatePrototype = Date.prototype;
+       var getTime = DatePrototype.getTime;
+       var nativeDateToISOString = DatePrototype.toISOString;
 
-                 if (bkey.length > 16) {
-                   bkey = binl(bkey, key.length * 8);
-                 }
+       // `Date.prototype.toISOString` method implementation
+       // https://tc39.es/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.call(this))) throw RangeError('Invalid time value');
+         var date = this;
+         var year = date.getUTCFullYear();
+         var milliseconds = date.getUTCMilliseconds();
+         var sign = year < 0 ? '-' : year > 9999 ? '+' : '';
+         return sign + padStart(abs$1(year), sign ? 6 : 4, 0) +
+           '-' + padStart(date.getUTCMonth() + 1, 2, 0) +
+           '-' + padStart(date.getUTCDate(), 2, 0) +
+           'T' + padStart(date.getUTCHours(), 2, 0) +
+           ':' + padStart(date.getUTCMinutes(), 2, 0) +
+           ':' + padStart(date.getUTCSeconds(), 2, 0) +
+           '.' + padStart(milliseconds, 3, 0) +
+           'Z';
+       } : nativeDateToISOString;
 
-                 ipad = Array(16), opad = Array(16);
+       // `Date.prototype.toISOString` method
+       // https://tc39.es/ecma262/#sec-date.prototype.toisostring
+       // PhantomJS / old WebKit has a broken implementations
+       _export({ target: 'Date', proto: true, forced: Date.prototype.toISOString !== dateToIsoString }, {
+         toISOString: dateToIsoString
+       });
 
-                 for (i = 0; i < 16; i += 1) {
-                   ipad[i] = bkey[i] ^ 0x36363636;
-                   opad[i] = bkey[i] ^ 0x5C5C5C5C;
-                 }
+       function behaviorBreathe() {
+         var duration = 800;
+         var steps = 4;
+         var selector = '.selected.shadow, .selected .shadow';
 
-                 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.
-                */
+         var _selected = select(null);
 
+         var _classed = '';
+         var _params = {};
+         var _done = false;
 
-               function binl(x, len) {
-                 var i,
-                     olda,
-                     oldb,
-                     oldc,
-                     oldd,
-                     a = 1732584193,
-                     b = -271733879,
-                     c = -1732584194,
-                     d = 271733878;
-                 /* append padding */
+         var _timer;
 
-                 x[len >> 5] |= 0x80 << len % 32;
-                 x[(len + 64 >>> 9 << 4) + 14] = len;
+         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 || '');
+           };
+         }
 
-                 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);
-                 }
+         function reset(selection) {
+           selection.style('stroke-opacity', null).style('stroke-width', null).style('fill-opacity', null).style('r', null);
+         }
 
-                 return Array(a, b, c, d);
-               }
-               /**
-                * These functions implement the four basic operations the algorithm uses.
-                */
+         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
 
-               function md5_cmn(q, a, b, x, s, t) {
-                 return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s), b);
-               }
+             if (tag === 'circle') {
+               opacity = parseFloat(s.style('fill-opacity') || 0.5);
+               width = parseFloat(s.style('r') || 15.5);
+             } else {
+               opacity = parseFloat(s.style('stroke-opacity') || 0.7);
+               width = parseFloat(s.style('stroke-width') || 10);
+             } // calculate from/to interpolation params..
 
-               function md5_ff(a, b, c, d, x, s, t) {
-                 return md5_cmn(b & c | ~b & d, a, b, x, s, t);
-               }
 
-               function md5_gg(a, b, c, d, x, s, t) {
-                 return md5_cmn(b & d | c & ~d, a, b, x, s, t);
-               }
+             p.tag = tag;
+             p.from.opacity = opacity * 0.6;
+             p.to.opacity = opacity * 1.25;
+             p.from.width = width * 0.7;
+             p.to.width = width * (tag === 'circle' ? 1.5 : 1);
+             _params[d.id] = p;
+           });
+         }
 
-               function md5_hh(a, b, c, d, x, s, t) {
-                 return md5_cmn(b ^ c ^ d, a, b, x, s, t);
-               }
+         function run(surface, fromTo) {
+           var toFrom = fromTo === 'from' ? 'to' : 'from';
+           var currSelected = surface.selectAll(selector);
+           var currClassed = surface.attr('class');
 
-               function md5_ii(a, b, c, d, x, s, t) {
-                 return md5_cmn(c ^ (b | ~d), a, b, x, s, t);
-               }
-             },
+           if (_done || currSelected.empty()) {
+             _selected.call(reset);
 
-             /**
-              * @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
+             _selected = select(null);
+             return;
+           }
 
-               this.hex = function (s) {
-                 return rstr2hex(rstr(s), hexcase);
-               };
+           if (!fastDeepEqual(currSelected.data(), _selected.data()) || currClassed !== _classed) {
+             _selected.call(reset);
 
-               this.b64 = function (s) {
-                 return rstr2b64(rstr(s), b64pad);
-               };
+             _classed = currClassed;
+             _selected = currSelected.call(calcAnimationParams);
+           }
 
-               this.any = function (s, e) {
-                 return rstr2any(rstr(s), e);
-               };
+           var didCallNextRun = false;
 
-               this.raw = function (s) {
-                 return rstr(s);
-               };
+           _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
 
-               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);
-               };
+             if (!select(this).classed('selected')) {
+               reset(select(this));
+             }
+           });
+         }
 
-               this.any_hmac = function (k, d, e) {
-                 return rstr2any(rstr_hmac(k, d), e);
-               };
-               /**
-                * Perform a simple self-test to see if the VM is working
-                * @return {String} Hexadecimal hash sample
-                * @public
-                */
+         function behavior(surface) {
+           _done = false;
+           _timer = timer(function () {
+             // wait for elements to actually become selected
+             if (surface.selectAll(selector).empty()) {
+               return false;
+             }
 
+             surface.call(run, 'from');
 
-               this.vm_test = function () {
-                 return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
-               };
-               /**
-                * @description Enable/disable uppercase hexadecimal returned string
-                * @param {boolean}
-                * @return {Object} this
-                * @public
-                */
+             _timer.stop();
 
+             return true;
+           }, 20);
+         }
 
-               this.setUpperCase = function (a) {
-                 if (typeof a === 'boolean') {
-                   hexcase = a;
-                 }
+         behavior.restartIfNeeded = function (surface) {
+           if (_selected.empty()) {
+             surface.call(run, 'from');
 
-                 return this;
-               };
-               /**
-                * @description Defines a base64 pad string
-                * @param {string} Pad
-                * @return {Object} this
-                * @public
-                */
+             if (_timer) {
+               _timer.stop();
+             }
+           }
+         };
 
+         behavior.off = function () {
+           _done = true;
 
-               this.setPad = function (a) {
-                 b64pad = a || b64pad;
-                 return this;
-               };
-               /**
-                * @description Defines a base64 pad string
-                * @param {boolean}
-                * @return {Object} this
-                * @public
-                */
+           if (_timer) {
+             _timer.stop();
+           }
 
+           _selected.interrupt().call(reset);
+         };
 
-               this.setUTF8 = function (a) {
-                 if (typeof a === 'boolean') {
-                   utf8 = a;
-                 }
+         return behavior;
+       }
 
-                 return this;
-               }; // private methods
+       /* Creates a keybinding behavior for an operation */
+       function behaviorOperation(context) {
+         var _operation;
 
-               /**
-                * Calculate the SHA-512 of a raw string
-                */
+         function keypress(d3_event) {
+           // prevent operations during low zoom selection
+           if (!context.map().withinEditableZoom()) return;
+           if (_operation.availableForKeypress && !_operation.availableForKeypress()) return;
+           d3_event.preventDefault();
 
+           var disabled = _operation.disabled();
 
-               function 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)
-                */
+           if (disabled) {
+             context.ui().flash.duration(4000).iconName('#iD-operation-' + _operation.id).iconClass('operation disabled').label(_operation.tooltip)();
+           } else {
+             context.ui().flash.duration(2000).iconName('#iD-operation-' + _operation.id).iconClass('operation').label(_operation.annotation() || _operation.title)();
+             if (_operation.point) _operation.point(null);
 
+             _operation();
+           }
+         }
 
-               function rstr_hmac(key, data) {
-                 var bkey, ipad, opad, i, hash;
-                 key = utf8 ? utf8Encode(key) : key;
-                 data = utf8 ? utf8Encode(data) : data;
-                 bkey = rstr2binb(key);
+         function behavior() {
+           if (_operation && _operation.available()) {
+             context.keybinding().on(_operation.keys, keypress);
+           }
 
-                 if (bkey.length > 16) {
-                   bkey = binb(bkey, key.length * 8);
-                 }
+           return behavior;
+         }
 
-                 ipad = Array(16), opad = Array(16);
+         behavior.off = function () {
+           context.keybinding().off(_operation.keys);
+         };
 
-                 for (i = 0; i < 16; i += 1) {
-                   ipad[i] = bkey[i] ^ 0x36363636;
-                   opad[i] = bkey[i] ^ 0x5C5C5C5C;
-                 }
+         behavior.which = function (_) {
+           if (!arguments.length) return _operation;
+           _operation = _;
+           return behavior;
+         };
 
-                 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
-                */
+         return behavior;
+       }
 
+       function operationCircularize(context, selectedIDs) {
+         var _extent;
 
-               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 */
+         var _actions = selectedIDs.map(getAction).filter(Boolean);
 
-                 x[len >> 5] |= 0x80 << 24 - len % 32;
-                 x[(len + 64 >> 9 << 4) + 15] = len;
+         var _amount = _actions.length === 1 ? 'single' : 'multiple';
 
-                 for (i = 0; i < x.length; i += 16) {
-                   olda = a;
-                   oldb = b;
-                   oldc = c;
-                   oldd = d;
-                   olde = e;
+         var _coords = utilGetAllNodes(selectedIDs, context.graph()).map(function (n) {
+           return n.loc;
+         });
 
-                   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);
-                     }
+         function getAction(entityID) {
+           var entity = context.entity(entityID);
+           if (entity.type !== 'way' || new Set(entity.nodes).size <= 1) return null;
 
-                     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 (!_extent) {
+             _extent = entity.extent(context.graph());
+           } else {
+             _extent = _extent.extend(entity.extent(context.graph()));
+           }
 
-                   a = safe_add(a, olda);
-                   b = safe_add(b, oldb);
-                   c = safe_add(c, oldc);
-                   d = safe_add(d, oldd);
-                   e = safe_add(e, olde);
-                 }
+           return actionCircularize(entityID, context.projection);
+         }
 
-                 return Array(a, b, c, d, e);
-               }
-               /**
-                * Perform the appropriate triplet combination function for the current
-                * iteration
-                */
+         var operation = function operation() {
+           if (!_actions.length) return;
 
+           var combinedAction = function combinedAction(graph, t) {
+             _actions.forEach(function (action) {
+               if (!action.disabled(graph)) {
+                 graph = action(graph, t);
+               }
+             });
 
-               function sha1_ft(t, b, c, d) {
-                 if (t < 20) {
-                   return b & c | ~b & d;
-                 }
+             return graph;
+           };
 
-                 if (t < 40) {
-                   return b ^ c ^ d;
-                 }
+           combinedAction.transitionable = true;
+           context.perform(combinedAction, operation.annotation());
+           window.setTimeout(function () {
+             context.validator().validate();
+           }, 300); // after any transition
+         };
 
-                 if (t < 60) {
-                   return b & c | b & d | c & d;
-                 }
+         operation.available = function () {
+           return _actions.length && selectedIDs.length === _actions.length;
+         }; // don't cache this because the visible extent could change
 
-                 return b ^ c ^ d;
-               }
-               /**
-                * Determine the appropriate additive constant for the current iteration
-                */
 
+         operation.disabled = function () {
+           if (!_actions.length) return '';
 
-               function sha1_kt(t) {
-                 return t < 20 ? 1518500249 : t < 40 ? 1859775393 : t < 60 ? -1894007588 : -899497514;
-               }
-             },
+           var actionDisableds = _actions.map(function (action) {
+             return action.disabled(context.graph());
+           }).filter(Boolean);
 
-             /**
-              * @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 : '=',
+           if (actionDisableds.length === _actions.length) {
+             // none of the features can be circularized
+             if (new Set(actionDisableds).size > 1) {
+               return 'multiple_blockers';
+             }
 
-               /* base-64 pad character. Default '=' for strict RFC compliance   */
-               utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true,
+             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';
+           }
 
-               /* enable/disable utf8 encoding */
-               sha256_K;
-               /* privileged (public) methods */
+           return false;
 
-               this.hex = function (s) {
-                 return rstr2hex(rstr(s, utf8));
-               };
+           function someMissing() {
+             if (context.inIntro()) return false;
+             var osm = context.connection();
 
-               this.b64 = function (s) {
-                 return rstr2b64(rstr(s, utf8), b64pad);
-               };
+             if (osm) {
+               var missing = _coords.filter(function (loc) {
+                 return !osm.isDataLoaded(loc);
+               });
 
-               this.any = function (s, e) {
-                 return rstr2any(rstr(s, utf8), e);
-               };
+               if (missing.length) {
+                 missing.forEach(function (loc) {
+                   context.loadTileAtLoc(loc);
+                 });
+                 return true;
+               }
+             }
 
-               this.raw = function (s) {
-                 return rstr(s, utf8);
-               };
+             return false;
+           }
+         };
 
-               this.hex_hmac = function (k, d) {
-                 return rstr2hex(rstr_hmac(k, d));
-               };
+         operation.tooltip = function () {
+           var disable = operation.disabled();
+           return disable ? _t('operations.circularize.' + disable + '.' + _amount) : _t('operations.circularize.description.' + _amount);
+         };
 
-               this.b64_hmac = function (k, d) {
-                 return rstr2b64(rstr_hmac(k, d), b64pad);
-               };
+         operation.annotation = function () {
+           return _t('operations.circularize.annotation.feature', {
+             n: _actions.length
+           });
+         };
 
-               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
-                */
+         operation.id = 'circularize';
+         operation.keys = [_t('operations.circularize.key')];
+         operation.title = _t('operations.circularize.title');
+         operation.behavior = behaviorOperation(context).which(operation);
+         return operation;
+       }
 
+       // For example, ⌘Z -> Ctrl+Z
 
-               this.vm_test = function () {
-                 return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
-               };
-               /**
-                * Enable/disable uppercase hexadecimal returned string
-                * @param {boolean}
-                * @return {Object} this
-                * @public
-                */
+       var uiCmd = function uiCmd(code) {
+         var detected = utilDetect();
 
+         if (detected.os === 'mac') {
+           return code;
+         }
 
-               this.setUpperCase = function (a) {
-                 if (typeof a === 'boolean') {
-                   hexcase = a;
-                 }
+         if (detected.os === 'win') {
+           if (code === '⌘⇧Z') return 'Ctrl+Y';
+         }
 
-                 return this;
-               };
-               /**
-                * @description Defines a base64 pad string
-                * @param {string} Pad
-                * @return {Object} this
-                * @public
-                */
+         var result = '',
+             replacements = {
+           '⌘': 'Ctrl',
+           '⇧': 'Shift',
+           '⌥': 'Alt',
+           '⌫': 'Backspace',
+           '⌦': 'Delete'
+         };
 
+         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];
+           }
+         }
 
-               this.setPad = function (a) {
-                 b64pad = a || b64pad;
-                 return this;
-               };
-               /**
-                * Defines a base64 pad string
-                * @param {boolean}
-                * @return {Object} this
-                * @public
-                */
+         return result;
+       }; // return a display-focused string for a given keyboard code
 
+       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;
+       };
 
-               this.setUTF8 = function (a) {
-                 if (typeof a === 'boolean') {
-                   utf8 = a;
-                 }
+       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());
 
-                 return this;
-               }; // private methods
+         var operation = function operation() {
+           var nextSelectedID;
+           var nextSelectedLoc;
 
-               /**
-                * Calculate the SHA-512 of a raw string
-                */
+           if (selectedIDs.length === 1) {
+             var id = selectedIDs[0];
+             var entity = context.entity(id);
+             var geometry = entity.geometry(context.graph());
+             var parents = context.graph().parentWays(entity);
+             var parent = parents[0]; // Select the next closest node in the way.
 
+             if (geometry === 'vertex') {
+               var nodes = parent.nodes;
+               var i = nodes.indexOf(id);
 
-               function rstr(s, utf8) {
-                 s = utf8 ? utf8Encode(s) : s;
-                 return binb2rstr(binb(rstr2binb(s), s.length * 8));
+               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;
                }
-               /**
-                * Calculate the HMAC-sha256 of a key and some data (raw strings)
-                */
 
+               nextSelectedID = nodes[i];
+               nextSelectedLoc = context.entity(nextSelectedID).loc;
+             }
+           }
 
-               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.perform(action, operation.annotation());
+           context.validator().validate();
 
-                 if (bkey.length > 16) {
-                   bkey = binb(bkey, key.length * 8);
-                 }
+           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));
+           }
+         };
 
-                 for (; i < 16; i += 1) {
-                   ipad[i] = bkey[i] ^ 0x36363636;
-                   opad[i] = bkey[i] ^ 0x5C5C5C5C;
-                 }
+         operation.available = function () {
+           return true;
+         };
 
-                 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
-                */
+         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';
+           }
 
+           return false;
 
-               function sha256_S(X, n) {
-                 return X >>> n | X << 32 - n;
-               }
+           function someMissing() {
+             if (context.inIntro()) return false;
+             var osm = context.connection();
 
-               function sha256_R(X, n) {
-                 return X >>> n;
-               }
+             if (osm) {
+               var missing = coords.filter(function (loc) {
+                 return !osm.isDataLoaded(loc);
+               });
 
-               function sha256_Ch(x, y, z) {
-                 return x & y ^ ~x & z;
+               if (missing.length) {
+                 missing.forEach(function (loc) {
+                   context.loadTileAtLoc(loc);
+                 });
+                 return true;
                }
+             }
 
-               function sha256_Maj(x, y, z) {
-                 return x & y ^ x & z ^ y & z;
-               }
+             return false;
+           }
 
-               function sha256_Sigma0256(x) {
-                 return sha256_S(x, 2) ^ sha256_S(x, 13) ^ sha256_S(x, 22);
-               }
+           function hasWikidataTag(id) {
+             var entity = context.entity(id);
+             return entity.tags.wikidata && entity.tags.wikidata.trim().length > 0;
+           }
 
-               function sha256_Sigma1256(x) {
-                 return sha256_S(x, 6) ^ sha256_S(x, 11) ^ sha256_S(x, 25);
-               }
+           function incompleteRelation(id) {
+             var entity = context.entity(id);
+             return entity.type === 'relation' && !entity.isComplete(context.graph());
+           }
 
-               function sha256_Gamma0256(x) {
-                 return sha256_S(x, 7) ^ sha256_S(x, 18) ^ sha256_R(x, 3);
-               }
+           function protectedMember(id) {
+             var entity = context.entity(id);
+             if (entity.type !== 'way') return false;
+             var parents = context.graph().parentRelations(entity);
 
-               function sha256_Gamma1256(x) {
-                 return sha256_S(x, 17) ^ sha256_S(x, 19) ^ sha256_R(x, 10);
+             for (var i = 0; i < parents.length; i++) {
+               var parent = parents[i];
+               var type = parent.tags.type;
+               var role = parent.memberById(id).role || 'outer';
+
+               if (type === 'route' || type === 'boundary' || type === 'multipolygon' && role === 'outer') {
+                 return true;
                }
+             }
 
-               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];
+             return false;
+           }
+         };
 
-               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 */
+         operation.tooltip = function () {
+           var disable = operation.disabled();
+           return disable ? _t('operations.delete.' + disable + '.' + multi) : _t('operations.delete.description.' + multi);
+         };
 
-                 m[l >> 5] |= 0x80 << 24 - l % 32;
-                 m[(l + 64 >> 9 << 4) + 15] = l;
+         operation.annotation = function () {
+           return selectedIDs.length === 1 ? _t('operations.delete.annotation.' + context.graph().geometry(selectedIDs[0])) : _t('operations.delete.annotation.feature', {
+             n: selectedIDs.length
+           });
+         };
 
-                 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];
+         operation.id = 'delete';
+         operation.keys = [uiCmd('⌘⌫'), uiCmd('⌘⌦'), uiCmd('⌦')];
+         operation.title = _t('operations.delete.title');
+         operation.behavior = behaviorOperation(context).which(operation);
+         return operation;
+       }
 
-                   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]);
-                     }
+       function operationOrthogonalize(context, selectedIDs) {
+         var _extent;
 
-                     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);
-                   }
+         var _type;
 
-                   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 _actions = selectedIDs.map(chooseAction).filter(Boolean);
 
-                 return HASH;
-               }
-             },
+         var _amount = _actions.length === 1 ? 'single' : 'multiple';
 
-             /**
-              * @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 _coords = utilGetAllNodes(selectedIDs, context.graph()).map(function (n) {
+           return n.loc;
+         });
 
-               /* hexadecimal output case format. false - lowercase; true - uppercase  */
-               b64pad = options && typeof options.pad === 'string' ? options.pad : '=',
+         function chooseAction(entityID) {
+           var entity = context.entity(entityID);
+           var geometry = entity.geometry(context.graph());
 
-               /* base-64 pad character. Default '=' for strict RFC compliance   */
-               utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true,
+           if (!_extent) {
+             _extent = entity.extent(context.graph());
+           } else {
+             _extent = _extent.extend(entity.extent(context.graph()));
+           } // square a line/area
 
-               /* enable/disable utf8 encoding */
-               sha512_k;
-               /* privileged (public) methods */
 
-               this.hex = function (s) {
-                 return rstr2hex(rstr(s));
-               };
+           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);
 
-               this.b64 = function (s) {
-                 return rstr2b64(rstr(s), b64pad);
-               };
+             if (parents.length === 1) {
+               var way = parents[0];
 
-               this.any = function (s, e) {
-                 return rstr2any(rstr(s), e);
-               };
+               if (way.nodes.indexOf(entityID) !== -1) {
+                 return actionOrthogonalize(way.id, context.projection, entityID);
+               }
+             }
+           }
 
-               this.raw = function (s) {
-                 return rstr(s);
-               };
+           return null;
+         }
 
-               this.hex_hmac = function (k, d) {
-                 return rstr2hex(rstr_hmac(k, d));
-               };
+         var operation = function operation() {
+           if (!_actions.length) return;
 
-               this.b64_hmac = function (k, d) {
-                 return rstr2b64(rstr_hmac(k, d), b64pad);
-               };
+           var combinedAction = function combinedAction(graph, t) {
+             _actions.forEach(function (action) {
+               if (!action.disabled(graph)) {
+                 graph = action(graph, t);
+               }
+             });
 
-               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
-                */
+             return graph;
+           };
 
+           combinedAction.transitionable = true;
+           context.perform(combinedAction, operation.annotation());
+           window.setTimeout(function () {
+             context.validator().validate();
+           }, 300); // after any transition
+         };
 
-               this.vm_test = function () {
-                 return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
-               };
-               /**
-                * @description Enable/disable uppercase hexadecimal returned string
-                * @param {boolean}
-                * @return {Object} this
-                * @public
-                */
+         operation.available = function () {
+           return _actions.length && selectedIDs.length === _actions.length;
+         }; // don't cache this because the visible extent could change
 
 
-               this.setUpperCase = function (a) {
-                 if (typeof a === 'boolean') {
-                   hexcase = a;
-                 }
+         operation.disabled = function () {
+           if (!_actions.length) return '';
 
-                 return this;
-               };
-               /**
-                * @description Defines a base64 pad string
-                * @param {string} Pad
-                * @return {Object} this
-                * @public
-                */
+           var actionDisableds = _actions.map(function (action) {
+             return action.disabled(context.graph());
+           }).filter(Boolean);
+
+           if (actionDisableds.length === _actions.length) {
+             // none of the features can be squared
+             if (new Set(actionDisableds).size > 1) {
+               return 'multiple_blockers';
+             }
+
+             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();
 
+             if (osm) {
+               var missing = _coords.filter(function (loc) {
+                 return !osm.isDataLoaded(loc);
+               });
 
-               this.setPad = function (a) {
-                 b64pad = a || b64pad;
-                 return this;
-               };
-               /**
-                * @description Defines a base64 pad string
-                * @param {boolean}
-                * @return {Object} this
-                * @public
-                */
+               if (missing.length) {
+                 missing.forEach(function (loc) {
+                   context.loadTileAtLoc(loc);
+                 });
+                 return true;
+               }
+             }
 
+             return false;
+           }
+         };
 
-               this.setUTF8 = function (a) {
-                 if (typeof a === 'boolean') {
-                   utf8 = a;
-                 }
+         operation.tooltip = function () {
+           var disable = operation.disabled();
+           return disable ? _t('operations.orthogonalize.' + disable + '.' + _amount) : _t('operations.orthogonalize.description.' + _type + '.' + _amount);
+         };
 
-                 return this;
-               };
-               /* private methods */
+         operation.annotation = function () {
+           return _t('operations.orthogonalize.annotation.' + _type, {
+             n: _actions.length
+           });
+         };
 
-               /**
-                * Calculate the SHA-512 of a raw string
-                */
+         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());
 
+         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 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)
-                */
+         operation.available = function () {
+           return nodes.length >= 3;
+         }; // don't cache this because the visible extent could change
 
 
-               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);
+         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 (bkey.length > 32) {
-                   bkey = binb(bkey, key.length * 8);
-                 }
+           return false;
 
-                 for (; i < 32; i += 1) {
-                   ipad[i] = bkey[i] ^ 0x36363636;
-                   opad[i] = bkey[i] ^ 0x5C5C5C5C;
-                 }
+           function someMissing() {
+             if (context.inIntro()) return false;
+             var osm = context.connection();
 
-                 hash = binb(ipad.concat(rstr2binb(data)), 1024 + data.length * 8);
-                 return binb2rstr(binb(opad.concat(hash), 1024 + 512));
+             if (osm) {
+               var missing = coords.filter(function (loc) {
+                 return !osm.isDataLoaded(loc);
+               });
+
+               if (missing.length) {
+                 missing.forEach(function (loc) {
+                   context.loadTileAtLoc(loc);
+                 });
+                 return true;
                }
-               /**
-                * Calculate the SHA-512 of an array of big-endian dwords, and a bit length
-                */
+             }
 
+             return false;
+           }
 
-               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);
+           function incompleteRelation(id) {
+             var entity = context.entity(id);
+             return entity.type === 'relation' && !entity.isComplete(context.graph());
+           }
+         };
 
-                 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)];
-                 }
+         operation.tooltip = function () {
+           var disable = operation.disabled();
+           return disable ? _t('operations.reflect.' + disable + '.' + multi) : _t('operations.reflect.description.' + axis + '.' + multi);
+         };
 
-                 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.
+         operation.annotation = function () {
+           return _t('operations.reflect.annotation.' + axis + '.feature', {
+             n: selectedIDs.length
+           });
+         };
 
+         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;
+       }
 
-                 x[len >> 5] |= 0x80 << 24 - (len & 0x1f);
-                 x[(len + 128 >> 10 << 5) + 31] = len;
-                 l = x.length;
+       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());
 
-                 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 operation = function operation() {
+           context.enter(modeMove(context, selectedIDs));
+         };
 
-                   for (j = 0; j < 16; j += 1) {
-                     W[j].h = x[i + 2 * j];
-                     W[j].l = x[i + 2 * j + 1];
-                   }
+         operation.available = function () {
+           return selectedIDs.length > 0;
+         };
 
-                   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
+         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';
+           }
 
-                     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]);
-                   }
+           return false;
 
-                   for (j = 0; j < 80; j += 1) {
-                     //Ch
-                     Ch.l = e.l & f.l ^ ~e.l & g.l;
-                     Ch.h = e.h & f.h ^ ~e.h & g.h; //Sigma1
+           function someMissing() {
+             if (context.inIntro()) return false;
+             var osm = context.connection();
 
-                     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
+             if (osm) {
+               var missing = coords.filter(function (loc) {
+                 return !osm.isDataLoaded(loc);
+               });
 
-                     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
+               if (missing.length) {
+                 missing.forEach(function (loc) {
+                   context.loadTileAtLoc(loc);
+                 });
+                 return true;
+               }
+             }
 
-                     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);
-                   }
+             return false;
+           }
 
-                   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
+           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.move.' + disable + '.' + multi) : _t('operations.move.description.' + multi);
+         };
 
-                 for (i = 0; i < 8; i += 1) {
-                   hash[2 * i] = H[i].h;
-                   hash[2 * i + 1] = H[i].l;
-                 }
+         operation.annotation = function () {
+           return selectedIDs.length === 1 ? _t('operations.move.annotation.' + context.graph().geometry(selectedIDs[0])) : _t('operations.move.annotation.feature', {
+             n: selectedIDs.length
+           });
+         };
 
-                 return hash;
-               } //A constructor for 64-bit numbers
+         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 modeRotate(context, entityIDs) {
+         var _tolerancePx = 4; // see also behaviorDrag, behaviorSelect, modeMove
 
-               function int64(h, l) {
-                 this.h = h;
-                 this.l = l; //this.toString = int64toString;
-               } //Copies src into dst, assuming both are 64-bit numbers
+         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
+         });
 
+         var _prevGraph;
 
-               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 _prevAngle;
 
+         var _prevTransform;
 
-               function int64rrot(dst, x, shift) {
-                 dst.l = x.l >>> shift | x.h << 32 - shift;
-                 dst.h = x.h >>> shift | x.l << 32 - shift;
-               } //Reverses the dwords of the source and then rotates right by shift.
-               //This is equivalent to rotation by 32+shift
+         var _pivot; // use pointer events on supported platforms; fallback to mouse events
 
 
-               function int64revrrot(dst, x, shift) {
-                 dst.l = x.h >>> shift | x.l << 32 - shift;
-                 dst.h = x.l >>> shift | x.h << 32 - shift;
-               } //Bitwise-shifts right a 64-bit number by shift
-               //Won't handle shift>=32, but it's never needed in SHA512
+         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
+         function doRotate(d3_event) {
+           var fn;
 
-               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
+           if (context.graph() !== _prevGraph) {
+             fn = context.perform;
+           } else {
+             fn = context.replace;
+           } // projection changed, recalculate _pivot
 
 
-               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 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 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 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();
+         }
 
+         function getPivot(points) {
+           var _pivot;
 
-               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 (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);
 
-             /**
-              * @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,
+             if (polygonHull.length === 2) {
+               _pivot = geoVecInterp(points[0], points[1], 0.5);
+             } else {
+               _pivot = d3_polygonCentroid(d3_polygonHull(points));
+             }
+           }
 
-               /* hexadecimal output case format. false - lowercase; true - uppercase  */
-               b64pad = options && typeof options.pad === 'string' ? options.pa : '=',
+           return _pivot;
+         }
 
-               /* base-64 pad character. Default '=' for strict RFC compliance   */
-               utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true,
+         function finish(d3_event) {
+           d3_event.stopPropagation();
+           context.replace(actionNoop(), annotation);
+           context.enter(modeSelect(context, entityIDs));
+         }
 
-               /* 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 */
+         function cancel() {
+           if (_prevGraph) context.pop(); // remove the rotate
 
-               this.hex = function (s) {
-                 return rstr2hex(rstr(s));
-               };
+           context.enter(modeSelect(context, entityIDs));
+         }
 
-               this.b64 = function (s) {
-                 return rstr2b64(rstr(s), b64pad);
-               };
+         function undone() {
+           context.enter(modeBrowse(context));
+         }
 
-               this.any = function (s, e) {
-                 return rstr2any(rstr(s), e);
-               };
+         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);
+         };
 
-               this.raw = function (s) {
-                 return rstr(s);
-               };
+         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([]);
+         };
 
-               this.hex_hmac = function (k, d) {
-                 return rstr2hex(rstr_hmac(k, d));
-               };
+         mode.selectedIDs = function () {
+           if (!arguments.length) return entityIDs; // no assign
 
-               this.b64_hmac = function (k, d) {
-                 return rstr2b64(rstr_hmac(k, d), b64pad);
-               };
+           return mode;
+         };
 
-               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
-                */
+         return mode;
+       }
+
+       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());
 
+         var operation = function operation() {
+           context.enter(modeRotate(context, selectedIDs));
+         };
 
-               this.vm_test = function () {
-                 return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
-               };
-               /**
-                * @description Enable/disable uppercase hexadecimal returned string
-                * @param {boolean}
-                * @return {Object} this
-                * @public
-                */
+         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';
+           }
 
-               this.setUpperCase = function (a) {
-                 if (typeof a === 'boolean') {
-                   hexcase = a;
-                 }
+           return false;
 
-                 return this;
-               };
-               /**
-                * @description Defines a base64 pad string
-                * @param {string} Pad
-                * @return {Object} this
-                * @public
-                */
+           function someMissing() {
+             if (context.inIntro()) return false;
+             var osm = context.connection();
 
+             if (osm) {
+               var missing = coords.filter(function (loc) {
+                 return !osm.isDataLoaded(loc);
+               });
 
-               this.setPad = function (a) {
-                 if (typeof a !== 'undefined') {
-                   b64pad = a;
-                 }
+               if (missing.length) {
+                 missing.forEach(function (loc) {
+                   context.loadTileAtLoc(loc);
+                 });
+                 return true;
+               }
+             }
 
-                 return this;
-               };
-               /**
-                * @description Defines a base64 pad string
-                * @param {boolean}
-                * @return {Object} this
-                * @public
-                */
+             return false;
+           }
 
+           function incompleteRelation(id) {
+             var entity = context.entity(id);
+             return entity.type === 'relation' && !entity.isComplete(context.graph());
+           }
+         };
 
-               this.setUTF8 = function (a) {
-                 if (typeof a === 'boolean') {
-                   utf8 = a;
-                 }
+         operation.tooltip = function () {
+           var disable = operation.disabled();
+           return disable ? _t('operations.rotate.' + disable + '.' + multi) : _t('operations.rotate.description.' + multi);
+         };
 
-                 return this;
-               };
-               /* private methods */
+         operation.annotation = function () {
+           return selectedIDs.length === 1 ? _t('operations.rotate.annotation.' + context.graph().geometry(selectedIDs[0])) : _t('operations.rotate.annotation.feature', {
+             n: selectedIDs.length
+           });
+         };
 
-               /**
-                * Calculate the rmd160 of a raw string
-                */
+         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
 
-               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)
-                */
+         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 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);
+         var _cache;
 
-                 if (bkey.length > 16) {
-                   bkey = binl(bkey, key.length * 8);
-                 }
+         var _origin;
 
-                 for (i = 0; i < 16; i += 1) {
-                   ipad[i] = bkey[i] ^ 0x36363636;
-                   opad[i] = bkey[i] ^ 0x5C5C5C5C;
-                 }
+         var _nudgeInterval; // use pointer events on supported platforms; fallback to mouse events
 
-                 hash = binl(ipad.concat(rstr2binl(data)), 512 + data.length * 8);
-                 return binl2rstr(binl(opad.concat(hash), 512 + 160));
-               }
-               /**
-                * Convert an array of little-endian words to a string
-                */
 
+         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-               function binl2rstr(input) {
-                 var i,
-                     output = '',
-                     l = input.length * 32;
+         function doMove(nudge) {
+           nudge = nudge || [0, 0];
+           var fn;
 
-                 for (i = 0; i < l; i += 8) {
-                   output += String.fromCharCode(input[i >> 5] >>> i % 32 & 0xFF);
-                 }
+           if (_prevGraph !== context.graph()) {
+             _cache = {};
+             _origin = context.map().mouseCoordinates();
+             fn = context.perform;
+           } else {
+             fn = context.overwrite;
+           }
 
-                 return output;
-               }
-               /**
-                * Calculate the RIPE-MD160 of an array of little-endian words, and a bit length.
-                */
+           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 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 */
+         function stopNudge() {
+           if (_nudgeInterval) {
+             window.clearInterval(_nudgeInterval);
+             _nudgeInterval = null;
+           }
+         }
 
-                 x[len >> 5] |= 0x80 << len % 32;
-                 x[(len + 64 >>> 9 << 4) + 14] = len;
-                 l = x.length;
+         function move() {
+           doMove();
+           var nudge = geoViewportEdge(context.map().mouse(), context.map().dimensions());
 
-                 for (i = 0; i < l; i += 16) {
-                   A1 = A2 = h0;
-                   B1 = B2 = h1;
-                   C1 = C2 = h2;
-                   D1 = D2 = h3;
-                   E1 = E2 = h4;
+           if (nudge) {
+             startNudge(nudge);
+           } else {
+             stopNudge();
+           }
+         }
 
-                   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 finish(d3_event) {
+           d3_event.stopPropagation();
+           context.replace(actionNoop(), annotation);
+           context.enter(modeSelect(context, entityIDs));
+           stopNudge();
+         }
 
-                   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;
-                 }
+         function cancel() {
+           if (baseGraph) {
+             while (context.graph() !== baseGraph) {
+               context.pop();
+             } // reset to baseGraph
 
-                 return [h0, h1, h2, h3, h4];
-               } // specific algorithm methods
 
+             context.enter(modeBrowse(context));
+           } else {
+             if (_prevGraph) context.pop(); // remove the move
 
-               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';
-               }
+             context.enter(modeSelect(context, entityIDs));
+           }
 
-               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';
-               }
+           stopNudge();
+         }
 
-               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
+         function undone() {
+           context.enter(modeBrowse(context));
+         }
 
-           (function (window, undefined$1) {
-             var freeExports = false;
+         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);
+         };
 
-             {
-               freeExports = exports;
+         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([]);
+         };
 
-               if (exports && _typeof(commonjsGlobal) === 'object' && commonjsGlobal && commonjsGlobal === commonjsGlobal.global) {
-                 window = commonjsGlobal;
-               }
-             }
+         mode.selectedIDs = function () {
+           if (!arguments.length) return entityIDs; // no assign
 
-             if (typeof undefined$1 === 'function' && _typeof(undefined$1.amd) === 'object' && undefined$1.amd) {
-               // define as an anonymous module, so, through path mapping, it can be aliased
-               undefined$1(function () {
-                 return Hashes;
-               });
-             } else if (freeExports) {
-               // in Node.js or RingoJS v0.8.0+
-               if ( module && module.exports === freeExports) {
-                 module.exports = Hashes;
-               } // in Narwhal or RingoJS v0.7.0-
-               else {
-                   freeExports.Hashes = Hashes;
-                 }
-             } else {
-               // in a browser or Rhino
-               window.Hashes = Hashes;
-             }
-           })(this);
-         })(); // IIFE
+           return mode;
+         };
 
-       });
+         return mode;
+       }
 
-       var immutable = extend$2;
-       var hasOwnProperty$2 = Object.prototype.hasOwnProperty;
+       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);
+           });
 
-       function extend$2() {
-         var target = {};
+           for (var id in copies) {
+             var oldEntity = oldGraph.entity(id);
+             var newEntity = copies[id];
 
-         for (var i = 0; i < arguments.length; i++) {
-           var source = arguments[i];
+             extent._extend(oldEntity.extent(oldGraph)); // Exclude child nodes from newIDs if their parent way was also copied.
 
-           for (var key in source) {
-             if (hasOwnProperty$2.call(source, key)) {
-               target[key] = source[key];
-             }
-           }
-         }
 
-         return target;
-       }
+             var parents = context.graph().parentWays(newEntity);
+             var parentCopied = parents.some(function (parent) {
+               return originals.has(parent.id);
+             });
 
-       var sha1 = new hashes.SHA1();
-       var ohauth = {};
+             if (!parentCopied) {
+               newIDs.push(newEntity.id);
+             }
+           } // Put pasted objects where mouse pointer is..
 
-       ohauth.qsString = function (obj) {
-         return Object.keys(obj).sort().map(function (key) {
-           return ohauth.percentEncode(key) + '=' + ohauth.percentEncode(obj[key]);
-         }).join('&');
-       };
 
-       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;
-         }, {});
-       };
+           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));
+         }
 
-       ohauth.rawxhr = function (method, url, data, headers, callback) {
-         var xhr = new XMLHttpRequest(),
-             twoHundred = /^20\d$/;
+         function behavior() {
+           context.keybinding().on(uiCmd('⌘V'), doPaste);
+           return behavior;
+         }
 
-         xhr.onreadystatechange = function () {
-           if (4 === xhr.readyState && 0 !== xhr.status) {
-             if (twoHundred.test(xhr.status)) callback(null, xhr);else return callback(xhr, null);
-           }
+         behavior.off = function () {
+           context.keybinding().off(uiCmd('⌘V'));
          };
 
-         xhr.onerror = function (e) {
-           return callback(e, null);
-         };
+         return behavior;
+       }
 
-         xhr.open(method, url, true);
+       // `String.prototype.repeat` method
+       // https://tc39.es/ecma262/#sec-string.prototype.repeat
+       _export({ target: 'String', proto: true }, {
+         repeat: stringRepeat
+       });
 
-         for (var h in headers) {
-           xhr.setRequestHeader(h, headers[h]);
-         }
+       /*
+           `behaviorDrag` is like `d3_behavior.drag`, with the following differences:
 
-         xhr.send(data);
-         return xhr;
-       };
+           * 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.
+        */
 
-       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 behaviorDrag() {
+         var dispatch = dispatch$8('start', 'move', 'end'); // see also behaviorSelect
 
-       ohauth.nonce = function () {
-         for (var o = ''; o.length < 6;) {
-           o += '0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZabcdefghiklmnopqrstuvwxyz'[Math.floor(Math.random() * 61)];
-         }
+         var _tolerancePx = 1; // keep this low to facilitate pixel-perfect micromapping
 
-         return o;
-       };
+         var _penTolerancePx = 4; // styluses can be touchy so require greater movement - #1981
 
-       ohauth.authHeader = function (obj) {
-         return Object.keys(obj).sort().map(function (key) {
-           return encodeURIComponent(key) + '="' + encodeURIComponent(obj[key]) + '"';
-         }).join(', ');
-       };
+         var _origin = null;
+         var _selector = '';
 
-       ohauth.timestamp = function () {
-         return ~~(+new Date() / 1000);
-       };
+         var _targetNode;
 
-       ohauth.percentEncode = function (s) {
-         return encodeURIComponent(s).replace(/\!/g, '%21').replace(/\'/g, '%27').replace(/\*/g, '%2A').replace(/\(/g, '%28').replace(/\)/g, '%29');
-       };
+         var _targetEntity;
 
-       ohauth.baseString = function (method, url, params) {
-         if (params.oauth_signature) delete params.oauth_signature;
-         return [method, ohauth.percentEncode(url), ohauth.percentEncode(ohauth.qsString(params))].join('&');
-       };
+         var _surface;
 
-       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.
-        */
+         var _pointerId; // use pointer events on supported platforms; fallback to mouse events
 
 
-       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();
+         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-           if (typeof extra_params === 'string' && extra_params.length > 0) {
-             extra_params = ohauth.stringQs(extra_params);
-           }
+         var d3_event_userSelectProperty = utilPrefixCSSProperty('UserSelect');
 
-           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()
+         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);
            };
-           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);
          };
-       };
 
-       var ohauth_1 = ohauth;
+         function pointerdown(d3_event) {
+           if (_pointerId) return;
+           _pointerId = d3_event.pointerId || 'mouse';
+           _targetNode = this; // only force reflow once per drag
 
-       var resolveUrl$1 = createCommonjsModule(function (module, exports) {
-         // Copyright 2014 Simon Lydell
-         // X11 (“MIT”) Licensed. (See LICENSE.)
-         void function (root, factory) {
-           {
-             module.exports = factory();
+           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];
            }
-         }(commonjsGlobal, function () {
-           function resolveUrl()
-           /* ...urls */
-           {
-             var numUrls = arguments.length;
 
-             if (numUrls === 0) {
-               throw new Error("resolveUrl requires at least one argument; got none.");
-             }
+           d3_event.stopPropagation();
 
-             var base = document.createElement("base");
-             base.href = arguments[0];
+           function pointermove(d3_event) {
+             if (_pointerId !== (d3_event.pointerId || 'mouse')) return;
+             var p = pointerLocGetter(d3_event);
 
-             if (numUrls === 1) {
-               return base.href;
+             if (!started) {
+               var dist = geoVecLength(startOrigin, p);
+               var tolerance = d3_event.pointerType === 'pen' ? _penTolerancePx : _tolerancePx; // don't start until the drag has actually moved somewhat
+
+               if (dist < tolerance) return;
+               started = true;
+               dispatch.call('start', this, d3_event, _targetEntity); // Don't send a `move` event in the same cycle as `start` since dragging
+               // a midpoint will convert the target to a node.
+             } else {
+               startOrigin = p;
+               d3_event.stopPropagation();
+               d3_event.preventDefault();
+               var dx = p[0] - startOrigin[0];
+               var dy = p[1] - startOrigin[1];
+               dispatch.call('move', this, d3_event, _targetEntity, [p[0] + offset[0], p[1] + offset[1]], [dx, dy]);
              }
+           }
 
-             var head = document.getElementsByTagName("head")[0];
-             head.insertBefore(base, head.firstChild);
-             var a = document.createElement("a");
-             var resolved;
+           function pointerup(d3_event) {
+             if (_pointerId !== (d3_event.pointerId || 'mouse')) return;
+             _pointerId = null;
 
-             for (var index = 1; index < numUrls; index++) {
-               a.href = arguments[index];
-               resolved = a.href;
-               base.href = resolved;
+             if (started) {
+               dispatch.call('end', this, d3_event, _targetEntity);
+               d3_event.preventDefault();
              }
 
-             head.removeChild(base);
-             return resolved;
+             select(window).on(_pointerPrefix + 'move.drag', null).on(_pointerPrefix + 'up.drag pointercancel.drag', null);
+             selectEnable();
            }
+         }
 
-           return resolveUrl;
-         });
-       });
+         function behavior(selection) {
+           var matchesSelector = utilPrefixDOMProperty('matchesSelector');
+           var delegate = pointerdown;
 
-       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
-       };
+           if (_selector) {
+             delegate = function delegate(d3_event) {
+               var root = this;
+               var target = d3_event.target;
 
-       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;
-               });
-             }
+               for (; target && target !== root; target = target.parentNode) {
+                 var datum = target.__data__;
+                 _targetEntity = datum instanceof osmNote ? datum : datum && datum.properties && datum.properties.entity;
 
-             return obj;
-           };
+                 if (_targetEntity && target[matchesSelector](_selector)) {
+                   return pointerdown.call(target, d3_event);
+                 }
+               }
+             };
+           }
+
+           selection.on(_pointerPrefix + 'down.drag' + _selector, delegate);
          }
-       }
 
-       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
+         behavior.off = function (selection) {
+           selection.on(_pointerPrefix + 'down.drag' + _selector, null);
+         };
 
+         behavior.selector = function (_) {
+           if (!arguments.length) return _selector;
+           _selector = _;
+           return behavior;
+         };
 
-           return function create(obj, assignProps1, assignProps2, etc) {
-             var assignArgsList = slice$2(arguments, 1);
-             F.prototype = obj;
-             return assign.apply(this, [new F()].concat(assignArgsList));
-           };
-         }
-       }
+         behavior.origin = function (_) {
+           if (!arguments.length) return _origin;
+           _origin = _;
+           return behavior;
+         };
 
-       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, '');
-           };
-         }
-       }
+         behavior.cancel = function () {
+           select(window).on(_pointerPrefix + 'move.drag', null).on(_pointerPrefix + 'up.drag pointercancel.drag', null);
+           return behavior;
+         };
 
-       function bind$1(obj, fn) {
-         return function () {
-           return fn.apply(obj, Array.prototype.slice.call(arguments, 0));
+         behavior.targetNode = function (_) {
+           if (!arguments.length) return _targetNode;
+           _targetNode = _;
+           return behavior;
          };
-       }
 
-       function slice$2(arr, index) {
-         return Array.prototype.slice.call(arr, index || 0);
-       }
+         behavior.targetEntity = function (_) {
+           if (!arguments.length) return _targetEntity;
+           _targetEntity = _;
+           return behavior;
+         };
 
-       function each(obj, fn) {
-         pluck(obj, function (val, key) {
-           fn(val, key);
-           return false;
-         });
-       }
+         behavior.surface = function (_) {
+           if (!arguments.length) return _surface;
+           _surface = _;
+           return behavior;
+         };
 
-       function map$1(obj, fn) {
-         var res = isList(obj) ? [] : {};
-         pluck(obj, function (v, k) {
-           res[k] = fn(v, k);
-           return false;
-         });
-         return res;
+         return utilRebind(behavior, dispatch, 'on');
        }
 
-       function pluck(obj, fn) {
-         if (isList(obj)) {
-           for (var i = 0; i < obj.length; i++) {
-             if (fn(obj[i], i)) {
-               return obj[i];
-             }
-           }
-         } else {
-           for (var key in obj) {
-             if (obj.hasOwnProperty(key)) {
-               if (fn(obj[key], key)) {
-                 return obj[key];
-               }
-             }
-           }
-         }
-       }
+       function 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);
 
-       function isList(val) {
-         return val != null && typeof val != 'function' && typeof val.length == 'number';
-       }
+         var _nudgeInterval;
 
-       function isFunction(val) {
-         return val && {}.toString.call(val) === '[object Function]';
-       }
+         var _restoreSelectedIDs = [];
+         var _wasMidpoint = false;
+         var _isCancelled = false;
 
-       function isObject$2(val) {
-         return val && {}.toString.call(val) === '[object Object]';
-       }
+         var _activeEntity;
 
-       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);
-           }
+         var _startLoc;
 
-           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);
+         var _lastLoc;
+
+         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);
          }
-       };
 
-       function _warn() {
-         var _console = typeof console == 'undefined' ? null : console;
+         function stopNudge() {
+           if (_nudgeInterval) {
+             window.clearInterval(_nudgeInterval);
+             _nudgeInterval = null;
+           }
+         }
 
-         if (!_console) {
-           return;
+         function moveAnnotation(entity) {
+           return _t('operations.move.annotation.' + entity.geometry(context.graph()));
          }
 
-         var fn = _console.warn ? _console.warn : _console.log;
-         fn.apply(_console, arguments);
-       }
+         function connectAnnotation(nodeEntity, targetEntity) {
+           var nodeGeometry = nodeEntity.geometry(context.graph());
+           var targetGeometry = targetEntity.geometry(context.graph());
 
-       function _createStore(storages, plugins, namespace) {
-         if (!namespace) {
-           namespace = '';
+           if (nodeGeometry === 'vertex' && targetGeometry === 'vertex') {
+             var nodeParentWayIDs = context.graph().parentWays(nodeEntity);
+             var targetParentWayIDs = context.graph().parentWays(targetEntity);
+             var sharedParentWays = utilArrayIntersection(nodeParentWayIDs, targetParentWayIDs); // if both vertices are part of the same way
+
+             if (sharedParentWays.length !== 0) {
+               // if the nodes are next to each other, they are merged
+               if (sharedParentWays[0].areAdjacent(nodeEntity.id, targetEntity.id)) {
+                 return _t('operations.connect.annotation.from_vertex.to_adjacent_vertex');
+               }
+
+               return _t('operations.connect.annotation.from_vertex.to_sibling_vertex');
+             }
+           }
+
+           return _t('operations.connect.annotation.from_' + nodeGeometry + '.to_' + targetGeometry);
          }
 
-         if (storages && !isList$1(storages)) {
-           storages = [storages];
+         function shouldSnapToNode(target) {
+           if (!_activeEntity) return false;
+           return _activeEntity.geometry(context.graph()) !== 'vertex' || target.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(target, context.graph());
          }
 
-         if (plugins && !isList$1(plugins)) {
-           plugins = [plugins];
+         function origin(entity) {
+           return context.projection(entity.loc);
          }
 
-         var namespacePrefix = namespace ? '__storejs_' + namespace + '_' : '';
-         var namespaceRegexp = namespace ? new RegExp('^' + namespacePrefix) : null;
-         var legalNamespaces = /^[a-zA-Z0-9_\-]*$/; // alpha-numeric + underscore and dash
+         function keydown(d3_event) {
+           if (d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
+             if (context.surface().classed('nope')) {
+               context.surface().classed('nope-suppressed', true);
+             }
 
-         if (!legalNamespaces.test(namespace)) {
-           throw new Error('store.js namespaces can only have alphanumerics + underscores and dashes');
+             context.surface().classed('nope', false).classed('nope-disabled', true);
+           }
          }
 
-         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;
+         function keyup(d3_event) {
+           if (d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
+             if (context.surface().classed('nope-suppressed')) {
+               context.surface().classed('nope', true);
              }
-           },
-           _assignPluginFnProp: function _assignPluginFnProp(pluginFnProp, propName) {
-             var oldFn = this[propName];
 
-             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.
+             context.surface().classed('nope-suppressed', false).classed('nope-disabled', false);
+           }
+         }
 
-               function super_fn() {
-                 if (!oldFn) {
-                   return;
-                 }
+         function start(d3_event, entity) {
+           _wasMidpoint = entity.type === 'midpoint';
+           var hasHidden = context.features().hasHiddenConnections(entity, context.graph());
+           _isCancelled = !context.editable() || d3_event.shiftKey || hasHidden;
 
-                 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.
+           if (_isCancelled) {
+             if (hasHidden) {
+               context.ui().flash.duration(4000).iconName('#iD-icon-no').label(_t('modes.drag_node.connected_to_hidden'))();
+             }
 
+             return drag.cancel();
+           }
 
-               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 (_wasMidpoint) {
+             var midpoint = entity;
+             entity = osmNode();
+             context.perform(actionAddMidpoint(midpoint, entity));
+             entity = context.entity(entity.id); // get post-action entity
 
+             var vertex = context.surface().selectAll('.' + entity.id);
+             drag.targetNode(vertex.node()).targetEntity(entity);
+           } else {
+             context.perform(actionNoop());
+           }
 
-             var val = '';
+           _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()`
 
-             try {
-               val = JSON.parse(strVal);
-             } catch (e) {
-               val = strVal;
-             }
 
-             return val !== undefined ? val : defaultVal;
-           },
-           _addStorage: function _addStorage(storage) {
-             if (this.enabled) {
-               return;
-             }
+         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 : {};
+           }
+         }
 
-             if (this._testStorage(storage)) {
-               this.storage = storage;
-               this.enabled = true;
+         function doMove(d3_event, entity, nudge) {
+           nudge = nudge || [0, 0];
+           var currPoint = d3_event && d3_event.point || context.projection(_lastLoc);
+           var currMouse = geoVecSubtract(currPoint, nudge);
+           var loc = context.projection.invert(currMouse);
+           var target, edge;
+
+           if (!_nudgeInterval) {
+             // If not nudging at the edge of the viewport, try to snap..
+             // related code
+             // - `mode/drag_node.js`     `doMove()`
+             // - `behavior/draw.js`      `click()`
+             // - `behavior/draw_way.js`  `move()`
+             var d = datum(d3_event);
+             target = d && d.properties && d.properties.entity;
+             var targetLoc = target && target.loc;
+             var targetNodes = d && d.properties && d.properties.nodes;
+
+             if (targetLoc) {
+               // snap to node/vertex - a point target with `.loc`
+               if (shouldSnapToNode(target)) {
+                 loc = targetLoc;
+               }
+             } else if (targetNodes) {
+               // snap to way - a line target with `.nodes`
+               edge = geoChooseEdge(targetNodes, context.map().mouse(), context.projection, end.id);
+
+               if (edge) {
+                 loc = edge.loc;
+               }
              }
-           },
-           _addPlugin: function _addPlugin(plugin) {
-             var self = this; // If the plugin is an array, then add all plugins in the array.
-             // This allows for a plugin to depend on other plugins.
+           }
 
-             if (isList$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.
+           context.replace(actionMoveNode(entity.id, loc)); // Below here: validations
+
+           var isInvalid = false; // Check if this connection to `target` could cause relations to break..
+
+           if (target) {
+             isInvalid = hasRelationConflict(entity, target, edge, context.graph());
+           } // Check if this drag causes the geometry to break..
+
+
+           if (!isInvalid) {
+             isInvalid = hasInvalidGeometry(entity, context.graph());
+           }
+
+           var nope = context.surface().classed('nope');
+
+           if (isInvalid === 'relation' || isInvalid === 'restriction') {
+             if (!nope) {
+               // about to nope - show hint
+               context.ui().flash.duration(4000).iconName('#iD-icon-no').label(_t('operations.connect.' + isInvalid, {
+                 relation: _mainPresetIndex.item('type/restriction').name()
+               }))();
+             }
+           } else if (isInvalid) {
+             var errorID = isInvalid === 'line' ? 'lines' : 'areas';
+             context.ui().flash.duration(3000).iconName('#iD-icon-no').label(_t('self_intersection.error.' + errorID))();
+           } else {
+             if (nope) {
+               // about to un-nope, remove hint
+               context.ui().flash.duration(1).label('')();
+             }
+           }
 
+           var nopeDisabled = context.surface().classed('nope-disabled');
 
-             var seenPlugin = pluck$1(this.plugins, function (seenPlugin) {
-               return plugin === seenPlugin;
-             });
+           if (nopeDisabled) {
+             context.surface().classed('nope', false).classed('nope-suppressed', isInvalid);
+           } else {
+             context.surface().classed('nope', isInvalid).classed('nope-suppressed', false);
+           }
 
-             if (seenPlugin) {
-               return;
-             }
+           _lastLoc = loc;
+         } // Uses `actionConnect.disabled()` to know whether this connection is ok..
 
-             this.plugins.push(plugin); // Check that the plugin is properly formed
 
-             if (!isFunction$1(plugin)) {
-               throw new Error('Plugins must be function values that return objects');
-             }
+         function hasRelationConflict(entity, target, edge, graph) {
+           var testGraph = graph.update(); // copy
+           // if snapping to way - add midpoint there and consider that the target..
 
-             var pluginProperties = plugin.call(this);
+           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?
 
-             if (!isObject$3(pluginProperties)) {
-               throw new Error('Plugins must return an object of function properties');
-             } // Add the plugin function properties to this store instance.
 
+           var ids = [entity.id, target.id];
+           return actionConnect(ids).disabled(testGraph);
+         }
 
-             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.');
-               }
+         function hasInvalidGeometry(entity, graph) {
+           var parents = graph.parentWays(entity);
+           var i, j, k;
 
-               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])');
+           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._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 relations = graph.parentRelations(parent);
 
-       var Global$1 = util.Global;
-       var localStorage_1 = {
-         name: 'localStorage',
-         read: read,
-         write: write,
-         each: each$2,
-         remove: remove$2,
-         clearAll: clearAll
-       };
+             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
 
-       function localStorage$1() {
-         return Global$1.localStorage;
-       }
+               for (k = 0; k < rings.length; k++) {
+                 nodes = rings[k].nodes;
 
-       function read(key) {
-         return localStorage$1().getItem(key);
-       }
+                 if (nodes.find(function (n) {
+                   return n.id === entity.id;
+                 })) {
+                   activeIndex = k;
 
-       function write(key, data) {
-         return localStorage$1().setItem(key, data);
-       }
+                   if (geoHasSelfIntersections(nodes, entity.id)) {
+                     return 'multipolygonMember';
+                   }
+                 }
 
-       function each$2(fn) {
-         for (var i = localStorage$1().length - 1; i >= 0; i--) {
-           var key = localStorage$1().key(i);
-           fn(read(key), key);
-         }
-       }
+                 rings[k].coords = nodes.map(function (n) {
+                   return n.loc;
+                 });
+               } // test active ring for intersections with other rings in the multipolygon
 
-       function remove$2(key) {
-         return localStorage$1().removeItem(key);
-       }
 
-       function clearAll() {
-         return localStorage$1().clear();
-       }
+               for (k = 0; k < rings.length; k++) {
+                 if (k === activeIndex) continue; // make sure active ring doesn't cross passive rings
 
-       // versions 6 and 7, where no localStorage, etc
-       // is available.
+                 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.
 
-       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;
 
-       function read$1(key) {
-         return globalStorage[key];
-       }
+             if (activeIndex === null) {
+               nodes = parent.nodes.map(function (nodeID) {
+                 return graph.entity(nodeID);
+               });
 
-       function write$1(key, data) {
-         globalStorage[key] = data;
-       }
+               if (nodes.length && geoHasSelfIntersections(nodes, entity.id)) {
+                 return parent.geometry(graph);
+               }
+             }
+           }
 
-       function each$3(fn) {
-         for (var i = globalStorage.length - 1; i >= 0; i--) {
-           var key = globalStorage.key(i);
-           fn(globalStorage[key], key);
+           return false;
          }
-       }
-
-       function remove$3(key) {
-         return globalStorage.removeItem(key);
-       }
 
-       function clearAll$1() {
-         each$3(function (key, _) {
-           delete globalStorage[key];
-         });
-       }
+         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());
 
-       // versions 6 and 7, where no localStorage, sessionStorage, etc
-       // is available.
+           if (nudge) {
+             startNudge(d3_event, entity, nudge);
+           } else {
+             stopNudge();
+           }
+         }
 
-       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;
+         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
 
-       var _withStorageEl = _makeIEStorageElFunction();
+           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));
+           }
 
-       var disable = (Global$3.navigator ? Global$3.navigator.userAgent : '').match(/ (MSIE 8|MSIE 9|MSIE 10)\./); // MSIE 9.x, MSIE 10.x
+           if (wasPoint) {
+             context.enter(modeSelect(context, [entity.id]));
+           } else {
+             var reselection = _restoreSelectedIDs.filter(function (id) {
+               return context.graph().hasEntity(id);
+             });
 
-       function write$2(unfixedKey, data) {
-         if (disable) {
-           return;
+             if (reselection.length) {
+               context.enter(modeSelect(context, reselection));
+             } else {
+               context.enter(modeBrowse(context));
+             }
+           }
          }
 
-         var fixedKey = fixKey(unfixedKey);
+         function _actionBounceBack(nodeID, toLoc) {
+           var moveNode = actionMoveNode(nodeID, toLoc);
 
-         _withStorageEl(function (storageEl) {
-           storageEl.setAttribute(fixedKey, data);
-           storageEl.save(storageName);
-         });
-       }
+           var action = function action(graph, t) {
+             // last time through, pop off the bounceback perform.
+             // it will then overwrite the initial perform with a moveNode that does nothing
+             if (t === 1) context.pop();
+             return moveNode(graph, t);
+           };
 
-       function read$2(unfixedKey) {
-         if (disable) {
-           return;
+           action.transitionable = true;
+           return action;
          }
 
-         var fixedKey = fixKey(unfixedKey);
-         var res = null;
-
-         _withStorageEl(function (storageEl) {
-           res = storageEl.getAttribute(fixedKey);
-         });
-
-         return res;
-       }
-
-       function each$4(callback) {
-         _withStorageEl(function (storageEl) {
-           var attributes = storageEl.XMLDocument.documentElement.attributes;
+         function cancel() {
+           drag.cancel();
+           context.enter(modeBrowse(context));
+         }
 
-           for (var i = attributes.length - 1; i >= 0; i--) {
-             var attr = attributes[i];
-             callback(storageEl.getAttribute(attr.name), attr.name);
-           }
-         });
-       }
+         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);
 
-       function remove$4(unfixedKey) {
-         var fixedKey = fixKey(unfixedKey);
+         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);
+         };
 
-         _withStorageEl(function (storageEl) {
-           storageEl.removeAttribute(fixedKey);
-           storageEl.save(storageName);
-         });
-       }
+         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();
+         };
 
-       function clearAll$2() {
-         _withStorageEl(function (storageEl) {
-           var attributes = storageEl.XMLDocument.documentElement.attributes;
-           storageEl.load(storageName);
+         mode.selectedIDs = function () {
+           if (!arguments.length) return _activeEntity ? [_activeEntity.id] : []; // no assign
 
-           for (var i = attributes.length - 1; i >= 0; i--) {
-             storageEl.removeAttribute(attributes[i].name);
-           }
+           return mode;
+         };
 
-           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
+         mode.activeID = function () {
+           if (!arguments.length) return _activeEntity && _activeEntity.id; // no assign
 
+           return mode;
+         };
 
-       var forbiddenCharsRegex = new RegExp("[!\"#$%&'()*+,/\\\\:;<=>?@[\\]^`{|}~]", "g");
+         mode.restoreSelectedIDs = function (_) {
+           if (!arguments.length) return _restoreSelectedIDs;
+           _restoreSelectedIDs = _;
+           return mode;
+         };
 
-       function fixKey(key) {
-         return key.replace(/^\d/, '___$&').replace(forbiddenCharsRegex, '___');
+         mode.behavior = drag;
+         return mode;
        }
 
-       function _makeIEStorageElFunction() {
-         if (!doc || !doc.documentElement || !doc.documentElement.addBehavior) {
-           return null;
-         }
-
-         var scriptTag = 'script',
-             storageOwner,
-             storageContainer,
-             storageEl; // Since #userData storage applies only to specific paths, we need to
-         // somehow link our data to a specific path.  We choose /favicon.ico
-         // as a pretty safe option, since all browsers already make a request to
-         // this URL anyway and being a 404 will not hurt us here.  We wrap an
-         // iframe pointing to the favicon in an ActiveXObject(htmlfile) object
-         // (see: http://msdn.microsoft.com/en-us/library/aa752574(v=VS.85).aspx)
-         // since the iframe access rules appear to allow direct access and
-         // manipulation of the document element, even for a 404 page.  This
-         // document can be used instead of the current document (which would
-         // have been limited to the current path) to perform #userData storage.
+       // 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 */ });
+       });
 
-         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;
+       // `Promise.prototype.finally` method
+       // https://tc39.es/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
+           );
          }
+       });
 
-         return function (storeFunction) {
-           var args = [].slice.call(arguments, 0);
-           args.unshift(storageEl); // See http://msdn.microsoft.com/en-us/library/ms531081(v=VS.85).aspx
-           // and http://msdn.microsoft.com/en-us/library/ms531424(v=VS.85).aspx
-
-           storageOwner.appendChild(storageEl);
-           storageEl.addBehavior('#default#userData');
-           storageEl.load(storageName);
-           storeFunction.apply(this, args);
-           storageOwner.removeChild(storageEl);
-           return;
-         };
+       // makes sure that native promise-based APIs `Promise#finally` properly works with patched `Promise#then`
+       if (typeof nativePromiseConstructor == 'function') {
+         var method = getBuiltIn('Promise').prototype['finally'];
+         if (nativePromiseConstructor.prototype['finally'] !== method) {
+           redefine(nativePromiseConstructor.prototype, 'finally', method, { unsafe: true });
+         }
        }
 
-       // doesn't work but cookies do. This implementation is adopted from
-       // https://developer.mozilla.org/en-US/docs/Web/API/Storage/LocalStorage
+       function quickselect(arr, k, left, right, compare) {
+         quickselectStep(arr, k, left || 0, right || arr.length - 1, compare || defaultCompare);
+       }
 
-       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 doc$1 = Global$4.document;
+       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 read$3(key) {
-         if (!key || !_has(key)) {
-           return 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);
 
-         var regexpStr = "(?:^|.*;\\s*)" + escape(key).replace(/[\-\.\+\*]/g, "\\$&") + "\\s*\\=\\s*((?:[^;](?!;))*[^;]?).*";
-         return unescape(doc$1.cookie.replace(new RegExp(regexpStr), "$1"));
-       }
+           while (i < j) {
+             swap(arr, i, j);
+             i++;
+             j--;
 
-       function each$5(callback) {
-         var cookies = doc$1.cookie.split(/; ?/g);
+             while (compare(arr[i], t) < 0) {
+               i++;
+             }
 
-         for (var i = cookies.length - 1; i >= 0; i--) {
-           if (!trim$4(cookies[i])) {
-             continue;
+             while (compare(arr[j], t) > 0) {
+               j--;
+             }
            }
 
-           var kvp = cookies[i].split('=');
-           var key = unescape(kvp[0]);
-           var val = unescape(kvp[1]);
-           callback(val, key);
+           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 write$3(key, data) {
-         if (!key) {
-           return;
-         }
+       function swap(arr, i, j) {
+         var tmp = arr[i];
+         arr[i] = arr[j];
+         arr[j] = tmp;
+       }
 
-         doc$1.cookie = escape(key) + "=" + escape(data) + "; expires=Tue, 19 Jan 2038 03:14:07 GMT; path=/";
+       function defaultCompare(a, b) {
+         return a < b ? -1 : a > b ? 1 : 0;
        }
 
-       function remove$5(key) {
-         if (!key || !_has(key)) {
-           return;
-         }
+       var RBush = /*#__PURE__*/function () {
+         function RBush() {
+           var maxEntries = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 9;
 
-         doc$1.cookie = escape(key) + "=; expires=Thu, 01 Jan 1970 00:00:00 GMT; path=/";
-       }
+           _classCallCheck$1(this, RBush);
 
-       function clearAll$3() {
-         each$5(function (_, key) {
-           remove$5(key);
-         });
-       }
+           // 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 _has(key) {
-         return new RegExp("(?:^|;\\s*)" + escape(key).replace(/[\-\.\+\*]/g, "\\$&") + "\\s*\\=").test(doc$1.cookie);
-       }
+         _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 = [];
 
-       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
-       };
+             while (node) {
+               for (var i = 0; i < node.children.length; i++) {
+                 var child = node.children[i];
+                 var childBBox = node.leaf ? toBBox(child) : child;
 
-       function sessionStorage() {
-         return Global$5.sessionStorage;
-       }
+                 if (intersects(bbox, childBBox)) {
+                   if (node.leaf) result.push(child);else if (contains(bbox, childBBox)) this._all(child, result);else nodesToSearch.push(child);
+                 }
+               }
 
-       function read$4(key) {
-         return sessionStorage().getItem(key);
-       }
+               node = nodesToSearch.pop();
+             }
 
-       function write$4(key, data) {
-         return sessionStorage().setItem(key, data);
-       }
+             return result;
+           }
+         }, {
+           key: "collides",
+           value: function collides(bbox) {
+             var node = this.data;
+             if (!intersects(bbox, node)) return false;
+             var nodesToSearch = [];
 
-       function each$6(fn) {
-         for (var i = sessionStorage().length - 1; i >= 0; i--) {
-           var key = sessionStorage().key(i);
-           fn(read$4(key), key);
-         }
-       }
+             while (node) {
+               for (var i = 0; i < node.children.length; i++) {
+                 var child = node.children[i];
+                 var childBBox = node.leaf ? this.toBBox(child) : child;
 
-       function remove$6(key) {
-         return sessionStorage().removeItem(key);
-       }
+                 if (intersects(bbox, childBBox)) {
+                   if (node.leaf || contains(bbox, childBBox)) return true;
+                   nodesToSearch.push(child);
+                 }
+               }
 
-       function clearAll$4() {
-         return sessionStorage().clear();
-       }
+               node = nodesToSearch.pop();
+             }
 
-       // 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 = {};
+             return false;
+           }
+         }, {
+           key: "load",
+           value: function load(data) {
+             if (!(data && data.length)) return this;
 
-       function read$5(key) {
-         return memoryStorage[key];
-       }
+             if (data.length < this._minEntries) {
+               for (var i = 0; i < data.length; i++) {
+                 this.insert(data[i]);
+               }
 
-       function write$5(key, data) {
-         memoryStorage[key] = data;
-       }
+               return this;
+             } // recursively build the tree with the given data from scratch using OMT algorithm
 
-       function each$7(callback) {
-         for (var key in memoryStorage) {
-           if (memoryStorage.hasOwnProperty(key)) {
-             callback(memoryStorage[key], key);
-           }
-         }
-       }
 
-       function remove$7(key) {
-         delete memoryStorage[key];
-       }
+             var node = this._build(data.slice(), 0, data.length - 1, 0);
 
-       function clearAll$5(key) {
-         memoryStorage = {};
-       }
+             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
 
-       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._insert(node, this.data.height - node.height - 1, true);
+             }
 
-       /*jslint
-           eval, for, this
-       */
+             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
 
-       /*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 = {};
-       }
+             while (node || path.length) {
+               if (!node) {
+                 // go up
+                 node = path.pop();
+                 parent = path[path.length - 1];
+                 i = indexes.pop();
+                 goingUp = true;
+               }
 
-       (function () {
+               if (node.leaf) {
+                 // check current node
+                 var index = findItem(item, node.children, equalsFn);
 
-         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;
+                 if (index !== -1) {
+                   // item found, remove the item and condense tree upwards
+                   node.children.splice(index, 1);
+                   path.push(node);
 
-         function f(n) {
-           // Format integers to have at least two digits.
-           return n < 10 ? "0" + n : n;
-         }
+                   this._condense(path);
 
-         function this_value() {
-           return this.valueOf();
-         }
+                   return this;
+                 }
+               }
 
-         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;
-           };
+               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
 
-           Boolean.prototype.toJSON = this_value;
-           Number.prototype.toJSON = this_value;
-           String.prototype.toJSON = this_value;
-         }
+             }
 
-         var gap;
-         var indent;
-         var meta;
-         var rep;
+             return this;
+           }
+         }, {
+           key: "toBBox",
+           value: function toBBox(item) {
+             return item;
+           }
+         }, {
+           key: "compareMinX",
+           value: function compareMinX(a, b) {
+             return a.minX - b.minX;
+           }
+         }, {
+           key: "compareMinY",
+           value: function compareMinY(a, b) {
+             return a.minY - b.minY;
+           }
+         }, {
+           key: "toJSON",
+           value: function toJSON() {
+             return this.data;
+           }
+         }, {
+           key: "fromJSON",
+           value: function fromJSON(data) {
+             this.data = data;
+             return this;
+           }
+         }, {
+           key: "_all",
+           value: function _all(node, result) {
+             var nodesToSearch = [];
 
-         function 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 + "\"";
-         }
+             while (node) {
+               if (node.leaf) result.push.apply(result, _toConsumableArray(node.children));else nodesToSearch.push.apply(nodesToSearch, _toConsumableArray(node.children));
+               node = nodesToSearch.pop();
+             }
 
-         function str(key, holder) {
-           // Produce a string from holder[key].
-           var i; // The loop counter.
+             return result;
+           }
+         }, {
+           key: "_build",
+           value: function _build(items, left, right, height) {
+             var N = right - left + 1;
+             var M = this._maxEntries;
+             var node;
 
-           var k; // The member key.
+             if (N <= M) {
+               // reached leaf level; return leaf
+               node = createNode(items.slice(left, right + 1));
+               calcBBox(node, this.toBBox);
+               return node;
+             }
 
-           var v; // The member value.
+             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
 
-           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.
+               M = Math.ceil(N / Math.pow(M, height - 1));
+             }
 
-           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.
+             node = createNode([]);
+             node.leaf = false;
+             node.height = height; // split the items into M mostly square tiles
 
+             var N2 = Math.ceil(N / M);
+             var N1 = N2 * Math.ceil(Math.sqrt(M));
+             multiSelect(items, left, right, N1, this.compareMinX);
 
-           if (typeof rep === "function") {
-             value = rep.call(holder, key, value);
-           } // What happens next depends on the value's type.
+             for (var i = left; i <= right; i += N1) {
+               var right2 = Math.min(i + N1 - 1, right);
+               multiSelect(items, i, right2, N2, this.compareMinY);
 
+               for (var j = i; j <= right2; j += N2) {
+                 var right3 = Math.min(j + N2 - 1, right2); // pack each entry recursively
 
-           switch (_typeof(value)) {
-             case "string":
-               return quote(value);
+                 node.children.push(this._build(items, j, right3, height - 1));
+               }
+             }
 
-             case "number":
-               // JSON numbers must be finite. Encode non-finite numbers as null.
-               return isFinite(value) ? String(value) : "null";
+             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;
 
-             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.
+               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
 
-             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.
+                 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];
+             }
 
-               gap += indent;
-               partial = []; // Is the value an array?
+             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
 
-               if (Object.prototype.toString.apply(value) === "[object Array]") {
-                 // The value is an array. Stringify every element. Use null as a placeholder
-                 // for non-JSON values.
-                 length = value.length;
+             var node = this._chooseSubtree(bbox, this.data, level, insertPath); // put the item into the 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.
 
+             node.children.push(item);
+             extend$1(node, bbox); // split on node overflow; propagate upwards if necessary
 
-                 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.
+             while (level >= 0) {
+               if (insertPath[level].children.length > this._maxEntries) {
+                 this._split(insertPath, level);
 
+                 level--;
+               } else break;
+             } // adjust bboxes along the insertion path
 
-               if (rep && _typeof(rep) === "object") {
-                 length = rep.length;
 
-                 for (i = 0; i < length; i += 1) {
-                   if (typeof rep[i] === "string") {
-                     k = rep[i];
-                     v = str(k, value);
+             this._adjustParentBBoxes(bbox, insertPath, level);
+           } // split overflowed node into two
 
-                     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);
+         }, {
+           key: "_split",
+           value: function _split(insertPath, level) {
+             var node = insertPath[level];
+             var M = node.children.length;
+             var m = this._minEntries;
 
-                     if (v) {
-                       partial.push(quote(k) + (gap ? ": " : ":") + v);
-                     }
-                   }
-                 }
-               } // Join all of the member texts together, separated with commas,
-               // and wrap them in braces.
+             this._chooseSplitAxis(node, m, M);
 
+             var splitIndex = this._chooseSplitIndex(node, m, M);
 
-               v = partial.length === 0 ? "{}" : gap ? "{\n" + gap + partial.join(",\n" + gap) + "\n" + mind + "}" : "{" + partial.join(",") + "}";
-               gap = mind;
-               return v;
+             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);
            }
-         } // If the JSON object does not yet have a stringify method, give it one.
+         }, {
+           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
 
+               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;
+                 }
+               }
+             }
 
-         if (typeof JSON.stringify !== "function") {
-           meta = {
-             // table of character substitutions
-             "\b": "\\b",
-             "\t": "\\t",
-             "\n": "\\n",
-             "\f": "\\f",
-             "\r": "\\r",
-             "\"": "\\\"",
-             "\\": "\\\\"
-           };
+             return index || M - m;
+           } // sorts node children by the best axis for split
 
-           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.
+         }, {
+           key: "_chooseSplitAxis",
+           value: function _chooseSplitAxis(node, m, M) {
+             var compareMinX = node.leaf ? this.compareMinX : compareNodeMinX;
+             var compareMinY = node.leaf ? this.compareMinY : compareNodeMinY;
 
-             if (typeof space === "number") {
-               for (i = 0; i < space; i += 1) {
-                 indent += " ";
-               } // If the space parameter is a string, it will be used as the indent string.
+             var xMargin = this._allDistMargin(node, m, M, compareMinX);
 
-             } 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 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
 
 
-             rep = replacer;
+             if (xMargin < yMargin) node.children.sort(compareMinX);
+           } // total margin of all possible split distributions where each node is at least m full
 
-             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.
+         }, {
+           key: "_allDistMargin",
+           value: function _allDistMargin(node, m, M, compare) {
+             node.children.sort(compare);
+             var toBBox = this.toBBox;
+             var leftBBox = distBBox(node, 0, m, toBBox);
+             var rightBBox = distBBox(node, M - m, M, toBBox);
+             var margin = bboxMargin(leftBBox) + bboxMargin(rightBBox);
 
+             for (var i = m; i < M - m; i++) {
+               var child = node.children[i];
+               extend$1(leftBBox, node.leaf ? toBBox(child) : child);
+               margin += bboxMargin(leftBBox);
+             }
 
-             return str("", {
-               "": value
-             });
-           };
-         } // If the JSON object does not yet have a parse method, give it one.
+             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);
+             }
 
+             return margin;
+           }
+         }, {
+           key: "_adjustParentBBoxes",
+           value: function _adjustParentBBoxes(bbox, path, level) {
+             // adjust bboxes along the given tree path
+             for (var i = level; i >= 0; i--) {
+               extend$1(path[i], bbox);
+             }
+           }
+         }, {
+           key: "_condense",
+           value: function _condense(path) {
+             // go through the path, removing empty nodes and updating bboxes
+             for (var i = path.length - 1, siblings; i >= 0; i--) {
+               if (path[i].children.length === 0) {
+                 if (i > 0) {
+                   siblings = path[i - 1].children;
+                   siblings.splice(siblings.indexOf(path[i]), 1);
+                 } else this.clear();
+               } else calcBBox(path[i], this.toBBox);
+             }
+           }
+         }]);
 
-         if (typeof JSON.parse !== "function") {
-           JSON.parse = function (text, reviver) {
-             // The parse method takes a text and an optional reviver function, and returns
-             // a JavaScript value if the text is a valid JSON text.
-             var j;
+         return RBush;
+       }();
 
-             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];
+       function findItem(item, items, equalsFn) {
+         if (!equalsFn) return items.indexOf(item);
 
-               if (value && _typeof(value) === "object") {
-                 for (k in value) {
-                   if (Object.prototype.hasOwnProperty.call(value, k)) {
-                     v = walk(value, k);
+         for (var i = 0; i < items.length; i++) {
+           if (equalsFn(item, items[i])) return i;
+         }
 
-                     if (v !== undefined) {
-                       value[k] = v;
-                     } else {
-                       delete value[k];
-                     }
-                   }
-                 }
-               }
+         return -1;
+       } // calculate node's bbox from bboxes of its children
 
-               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.
 
+       function calcBBox(node, toBBox) {
+         distBBox(node, 0, node.children.length, toBBox, node);
+       } // min bounding rectangle of node children from k to p-1
 
-             text = String(text);
-             rx_dangerous.lastIndex = 0;
 
-             if (rx_dangerous.test(text)) {
-               text = text.replace(rx_dangerous, function (a) {
-                 return "\\u" + ("0000" + a.charCodeAt(0).toString(16)).slice(-4);
-               });
-             } // 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.
+       function distBBox(node, k, p, toBBox, destNode) {
+         if (!destNode) destNode = createNode(null);
+         destNode.minX = Infinity;
+         destNode.minY = Infinity;
+         destNode.maxX = -Infinity;
+         destNode.maxY = -Infinity;
 
+         for (var i = k; i < p; i++) {
+           var child = node.children[i];
+           extend$1(destNode, node.leaf ? toBBox(child) : child);
+         }
 
-             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 destNode;
+       }
 
-               return typeof reviver === "function" ? walk({
-                 "": j
-               }, "") : j;
-             } // If the text is not JSON parseable, then a SyntaxError is thrown.
+       function extend$1(a, b) {
+         a.minX = Math.min(a.minX, b.minX);
+         a.minY = Math.min(a.minY, b.minY);
+         a.maxX = Math.max(a.maxX, b.maxX);
+         a.maxY = Math.max(a.maxY, b.maxY);
+         return a;
+       }
 
+       function compareNodeMinX(a, b) {
+         return a.minX - b.minX;
+       }
 
-             throw new SyntaxError("JSON.parse");
-           };
-         }
-       })();
+       function compareNodeMinY(a, b) {
+         return a.minY - b.minY;
+       }
 
-       var json2 = json2Plugin;
+       function bboxArea(a) {
+         return (a.maxX - a.minX) * (a.maxY - a.minY);
+       }
 
-       function json2Plugin() {
-         return {};
+       function bboxMargin(a) {
+         return a.maxX - a.minX + (a.maxY - a.minY);
        }
 
-       var plugins = [json2];
-       var store_legacy = storeEngine.createStore(all, plugins);
+       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));
+       }
 
-       //
-       // 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 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 contains(a, b) {
+         return a.minX <= b.minX && a.minY <= b.minY && b.maxX <= a.maxX && b.maxY <= a.maxY;
+       }
 
-       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
+       function intersects(a, b) {
+         return b.minX <= a.maxX && b.minY <= a.maxY && b.maxX >= a.minX && b.maxY >= a.minY;
+       }
 
-         oauth.authenticated = function () {
-           return !!(token('oauth_token') && token('oauth_token_secret'));
+       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
 
-         oauth.logout = function () {
-           token('oauth_token', '');
-           token('oauth_token_secret', '');
-           token('oauth_request_token_secret', '');
-           return oauth;
-         }; // TODO: detect lack of click event
 
+       function multiSelect(arr, left, right, n, compare) {
+         var stack = [left, right];
 
-         oauth.authenticate = function (callback) {
-           if (oauth.authenticated()) return callback();
-           oauth.logout(); // ## Getting a request token
+         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);
+         }
+       }
 
-           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));
+       function responseText(response) {
+         if (!response.ok) throw new Error(response.status + " " + response.statusText);
+         return response.text();
+       }
 
-           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;
+       function d3_text (input, init) {
+         return fetch(input, init).then(responseText);
+       }
 
-             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.
+       function responseJson(response) {
+         if (!response.ok) throw new Error(response.status + " " + response.statusText);
+         if (response.status === 204 || response.status === 205) return;
+         return response.json();
+       }
 
+       function d3_json (input, init) {
+         return fetch(input, init).then(responseJson);
+       }
 
-           ohauth_1.xhr('POST', url, params, null, {}, reqTokenDone);
-           o.loading();
+       function parser(type) {
+         return function (input, init) {
+           return d3_text(input, init).then(function (text) {
+             return new DOMParser().parseFromString(text, type);
+           });
+         };
+       }
 
-           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 d3_xml = parser("application/xml");
+       var svg = parser("image/svg+xml");
 
-             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.
+       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;
 
-           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.
+       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 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 abortUnwantedRequests$3(cache, tiles) {
+         Object.keys(cache.inflightTile).forEach(function (k) {
+           var wanted = tiles.find(function (tile) {
+             return k === tile.id;
+           });
 
-             ohauth_1.xhr('POST', url, params, null, {}, accessTokenDone);
-             o.loading();
+           if (!wanted) {
+             abortRequest$6(cache.inflightTile[k]);
+             delete cache.inflightTile[k];
            }
+         });
+       }
 
-           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 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
 
-         oauth.bringPopupWindowToFront = function () {
-           var brougtPopupToFront = false;
 
-           try {
-             // This may cause a cross-origin error:
-             // `DOMException: Blocked a frame with origin "..." from accessing a cross-origin frame.`
-             if (oauth.popupWindow && !oauth.popupWindow.closed) {
-               oauth.popupWindow.focus();
-               brougtPopupToFront = true;
-             }
-           } catch (err) {// Bringing popup window to front failed (probably because of the cross-origin error mentioned above)
-           }
+       function updateRtree$3(item, replace) {
+         _cache$2.rtree.remove(item, function (a, b) {
+           return a.data.id === b.data.id;
+         });
 
-           return brougtPopupToFront;
-         };
+         if (replace) {
+           _cache$2.rtree.insert(item);
+         }
+       }
 
-         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 tokenReplacements(d) {
+         if (!(d instanceof QAItem)) return;
+         var htmlRegex = new RegExp(/<\/[a-z][\s\S]*>/);
+         var replacements = {};
+         var issueTemplate = _krData.errorTypes[d.whichType];
 
-             ohauth_1.xhr('POST', url, params, null, {}, accessTokenDone);
-             o.loading();
-           }
+         if (!issueTemplate) {
+           /* eslint-disable no-console */
+           console.log('No Template: ', d.whichType);
+           console.log('  ', d.description);
+           /* eslint-enable no-console */
 
-           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);
-           }
+           return;
+         } // some descriptions are just fixed text
 
-           get_access_token(oauth_token);
-         }; // # xhr
-         //
-         // A single XMLHttpRequest wrapper that does authenticated calls if the
-         // user has logged in.
 
+         if (!issueTemplate.regex) return; // regex pattern should match description with variable details captured
 
-         oauth.xhr = function (options, callback) {
-           if (!oauth.authenticated()) {
-             if (o.auto) {
-               return oauth.authenticate(run);
-             } else {
-               callback('not authenticated', null);
-               return;
-             }
-           } else {
-             return run();
-           }
+         var errorRegex = new RegExp(issueTemplate.regex, 'i');
+         var errorMatch = errorRegex.exec(d.description);
 
-           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 (!errorMatch) {
+           /* eslint-disable no-console */
+           console.log('Unmatched: ', d.whichType);
+           console.log('  ', d.description);
+           console.log('  ', errorRegex);
+           /* eslint-enable no-console */
 
-             if ((!options.options || !options.options.header || options.options.header['Content-Type'] === 'application/x-www-form-urlencoded') && options.content) {
-               params = immutable(params, ohauth_1.stringQs(options.content));
-             }
+           return;
+         }
 
-             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);
-           }
+         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 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
+           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]);
+             }
+           }
 
-         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;
-         };
+           replacements['var' + i] = capture;
+         }
 
-         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
+         return replacements;
+       }
 
-           o.loading = o.loading || function () {};
+       function parseError(capture, idType) {
+         var compare = capture.toLowerCase();
 
-           o.done = o.done || function () {};
+         if (_krData.localizeStrings[compare]) {
+           // some replacement strings can be localized
+           capture = _t('QA.keepRight.error_parts.' + _krData.localizeStrings[compare]);
+         }
 
-           return oauth.preauth(o);
-         }; // 'stamp' an authentication object from `getAuth()`
-         // with a [nonce](http://en.wikipedia.org/wiki/Cryptographic_nonce)
-         // and timestamp
+         switch (idType) {
+           // link a string like "this node"
+           case 'this':
+             capture = linkErrorObject(capture);
+             break;
 
+           case 'url':
+             capture = linkURL(capture);
+             break;
+           // link an entity ID
 
-         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
+           case 'n':
+           case 'w':
+           case 'r':
+             capture = linkEntity(idType + capture);
+             break;
+           // some errors have more complex ID lists/variance
 
+           case '20':
+             capture = parse20(capture);
+             break;
 
-         var token;
+           case '211':
+             capture = parse211(capture);
+             break;
 
-         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);
-           };
-         } else {
-           var storage = {};
+           case '231':
+             capture = parse231(capture);
+             break;
 
-           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
+           case '294':
+             capture = parse294(capture);
+             break;
 
+           case '370':
+             capture = parse370(capture);
+             break;
+         }
 
-         function getAuth(o) {
-           return {
-             oauth_consumer_key: o.oauth_consumer_key,
-             oauth_signature_method: 'HMAC-SHA1'
-           };
-         } // potentially pre-authorize
+         return capture;
 
+         function linkErrorObject(d) {
+           return "<a class=\"error_object_link\">".concat(d, "</a>");
+         }
 
-         oauth.options(o);
-         return oauth;
-       };
+         function linkEntity(d) {
+           return "<a class=\"error_entity_link\">".concat(d, "</a>");
+         }
 
-       var JXON = new function () {
-         var sValueProp = 'keyValue',
-             sAttributesProp = 'keyAttributes',
-             sAttrPref = '@',
+         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...
 
-         /* you can customize these values */
-         aCache = [],
-             rIsNull = /^\s*$/,
-             rIsBool = /^(?:true|false)$/i;
 
-         function parseText(sValue) {
-           if (rIsNull.test(sValue)) {
-             return null;
-           }
+         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 (rIsBool.test(sValue)) {
-             return sValue.toLowerCase() === 'true';
-           }
 
-           if (isFinite(sValue)) {
-             return parseFloat(sValue);
-           }
+         function parse231(capture) {
+           var newList = []; // unfortunately 'layer' can itself contain commas, so we split on '),'
 
-           if (isFinite(Date.parse(sValue))) {
-             return new Date(sValue);
-           }
+           var items = capture.split('),');
+           items.forEach(function (item) {
+             var match = item.match(/\#(\d+)\((.+)\)?/);
 
-           return sValue;
-         }
+             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...
 
-         function EmptyTree() {}
 
-         EmptyTree.prototype.toString = function () {
-           return 'null';
-         };
+         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
 
-         EmptyTree.prototype.valueOf = function () {
-           return null;
-         };
+             var role = "\"".concat(item[0], "\""); // first letter of node/relation provides the type
 
-         function objectify(vValue) {
-           return vValue === null ? new EmptyTree() : vValue instanceof Object ? vValue : new vValue.constructor(vValue);
-         }
+             var idType = item[1].slice(0, 1); // ID has # at the front
 
-         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 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')"
 
-           if (bChildren) {
-             for (var oNode, nItem = 0; nItem < oParentNode.childNodes.length; nItem++) {
-               oNode = oParentNode.childNodes.item(nItem);
 
-               if (oNode.nodeType === 4) {
-                 sCollectedTxt += oNode.nodeValue;
-               }
-               /* nodeType is 'CDATASection' (4) */
-               else if (oNode.nodeType === 3) {
-                   sCollectedTxt += oNode.nodeValue.trim();
-                 }
-                 /* nodeType is 'Text' (3) */
-                 else if (oNode.nodeType === 1 && !oNode.prefix) {
-                     aCache.push(oNode);
-                   }
-               /* nodeType is 'Element' (1) */
+         function parse370(capture) {
+           if (!capture) return '';
+           var match = capture.match(/\(including the name (\'.+\')\)/);
 
-             }
+           if (match && match.length) {
+             return _t('QA.keepRight.errorTypes.370.including_the_name', {
+               name: match[1]
+             });
            }
 
-           var nLevelEnd = aCache.length,
-               vBuiltVal = parseText(sCollectedTxt);
+           return '';
+         } // arbitrary node list of form: #ID,#ID,#ID...
 
-           if (!bHighVerb && (bChildren || bAttributes)) {
-             vResult = nVerb === 0 ? objectify(vBuiltVal) : {};
-           }
 
-           for (var nElId = nLevelStart; nElId < nLevelEnd; nElId++) {
-             sProp = aCache[nElId].nodeName.toLowerCase();
-             vContent = createObjTree(aCache[nElId], nVerb, bFreeze, bNesteAttr);
+         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(', ');
+         }
+       }
 
-             if (vResult.hasOwnProperty(sProp)) {
-               if (vResult[sProp].constructor !== Array) {
-                 vResult[sProp] = [vResult[sProp]];
-               }
+       var serviceKeepRight = {
+         title: 'keepRight',
+         init: function init() {
+           _mainFileFetcher.get('keepRight').then(function (d) {
+             return _krData = d;
+           });
 
-               vResult[sProp].push(vContent);
-             } else {
-               vResult[sProp] = vContent;
-               nLength++;
-             }
+           if (!_cache$2) {
+             this.reset();
            }
 
-           if (bAttributes) {
-             var nAttrLen = oParentNode.attributes.length,
-                 sAPrefix = bNesteAttr ? '' : sAttrPref,
-                 oAttrParent = bNesteAttr ? {} : vResult;
+           this.event = utilRebind(this, dispatch$7, 'on');
+         },
+         reset: function reset() {
+           if (_cache$2) {
+             Object.values(_cache$2.inflightTile).forEach(abortRequest$6);
+           }
 
-             for (var oAttrib, nAttrib = 0; nAttrib < nAttrLen; nLength++, nAttrib++) {
-               oAttrib = oParentNode.attributes.item(nAttrib);
-               oAttrParent[sAPrefix + oAttrib.name.toLowerCase()] = parseText(oAttrib.value.trim());
-             }
+           _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;
 
-             if (bNesteAttr) {
-               if (bFreeze) {
-                 Object.freeze(oAttrParent);
-               }
+           var options = {
+             format: 'geojson',
+             ch: _krRuleset
+           }; // determine the needed tiles to cover the view
 
-               vResult[sAttributesProp] = oAttrParent;
-               nLength -= nAttrLen - 1;
-             }
-           }
+           var tiles = tiler$6.zoomExtent([_tileZoom$3, _tileZoom$3]).getTiles(projection); // abort inflight requests that are no longer needed
 
-           if (nVerb === 3 || (nVerb === 2 || nVerb === 1 && nLength > 0) && sCollectedTxt) {
-             vResult[sValueProp] = vBuiltVal;
-           } else if (!bHighVerb && nLength === 0 && sCollectedTxt) {
-             vResult = vBuiltVal;
-           }
+           abortUnwantedRequests$3(_cache$2, tiles); // issue new requests..
 
-           if (bFreeze && (bHighVerb || nLength > 0)) {
-             Object.freeze(vResult);
-           }
+           tiles.forEach(function (tile) {
+             if (_cache$2.loadedTile[tile.id] || _cache$2.inflightTile[tile.id]) return;
 
-           aCache.length = nLevelStart;
-           return vResult;
-         }
+             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 loadObjTree(oXMLDoc, oParentEl, oParentObj) {
-           var vValue, oChild;
+             var params = Object.assign({}, options, {
+               left: left,
+               bottom: bottom,
+               right: right,
+               top: top
+             });
+             var url = "".concat(_krUrlRoot, "/export.php?") + utilQsString(params);
+             var controller = new AbortController();
+             _cache$2.inflightTile[tile.id] = controller;
+             d3_json(url, {
+               signal: controller.signal
+             }).then(function (data) {
+               delete _cache$2.inflightTile[tile.id];
+               _cache$2.loadedTile[tile.id] = true;
 
-           if (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()));
-           }
+               if (!data || !data.features || !data.features.length) {
+                 throw new Error('No Data');
+               }
 
-           for (var sName in oParentObj) {
-             vValue = oParentObj[sName];
+               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)
 
-             if (isFinite(sName) || vValue instanceof Function) {
-               continue;
-             }
-             /* verbosity level is 0 */
+                 var issueTemplate = _krData.errorTypes[itemType];
+                 var parentIssueType = (Math.floor(itemType / 10) * 10).toString(); // try to handle error type directly, fallback to parent error type.
 
+                 var whichType = issueTemplate ? itemType : parentIssueType;
+                 var whichTemplate = _krData.errorTypes[whichType]; // Rewrite a few of the errors at this point..
+                 // This is done to make them easier to linkify and translate.
 
-             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);
+                 switch (whichType) {
+                   case '170':
+                     description = "This feature has a FIXME tag: ".concat(description);
+                     break;
 
-               if (vValue instanceof Object) {
-                 loadObjTree(oXMLDoc, oChild, vValue);
-               } else if (vValue !== null && vValue !== true) {
-                 oChild.appendChild(oXMLDoc.createTextNode(vValue.toString()));
-               }
+                   case '292':
+                   case '293':
+                     description = description.replace('A turn-', 'This turn-');
+                     break;
 
-               oParentEl.appendChild(oChild);
-             }
-           }
-         }
+                   case '294':
+                   case '295':
+                   case '296':
+                   case '297':
+                   case '298':
+                     description = "This turn-restriction~".concat(description);
+                     break;
 
-         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;
+                   case '300':
+                     description = 'This highway is missing a maxspeed tag';
+                     break;
 
-           return createObjTree(oXMLParent, _nVerb, bFreeze || false, arguments.length > 3 ? bNesteAttributes : _nVerb === 3);
-         };
+                   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
 
-         this.unbuild = function (oObjTree) {
-           var oNewDoc = document.implementation.createDocument('', '', null);
-           loadObjTree(oNewDoc, oNewDoc, oObjTree);
-           return oNewDoc;
-         };
 
-         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));
+                 var coincident = false;
 
-       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
+                 do {
+                   // first time, move marker up. after that, move marker right.
+                   var delta = coincident ? [0.00001, 0] : [0, 0.00001];
+                   loc = geoVecAdd(loc, delta);
+                   var bbox = geoExtent(loc).bbox();
+                   coincident = _cache$2.rtree.search(bbox).length;
+                 } while (coincident);
 
-       var _imageryBlocklists = [/.*\.google(apis)?\..*\/(vt|kh)[\?\/].*([xyz]=.*){3}.*/];
-       var _tileCache = {
-         toLoad: {},
-         loaded: {},
-         inflight: {},
-         seen: {},
-         rtree: new RBush()
-       };
-       var _noteCache = {
-         toLoad: {},
-         loaded: {},
-         inflight: {},
-         inflightPost: {},
-         note: {},
-         closed: {},
-         rtree: new RBush()
-       };
-       var _userCache = {
-         toLoad: {},
-         user: {}
-       };
+                 var 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;
 
-       var _cachedApiStatus;
+                 _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;
 
-       var _changeset = {};
+           if (_cache$2.inflightPost[d.id]) {
+             return callback({
+               message: 'Error update already inflight',
+               status: -2
+             }, d);
+           }
 
-       var _deferred = new Set();
+           var params = {
+             schema: d.schema,
+             id: d.id
+           };
 
-       var _connectionID = 1;
-       var _tileZoom$3 = 16;
-       var _noteZoom = 12;
+           if (d.newStatus) {
+             params.st = d.newStatus;
+           }
 
-       var _rateLimitError;
+           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.
 
-       var _userChangesets;
 
-       var _userDetails;
+           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 _off; // set a default but also load this from the API status
+           d3_json(url, {
+             signal: controller.signal
+           })["finally"](function () {
+             delete _cache$2.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);
 
+               _cache$2.closed["".concat(d.schema, ":").concat(d.id)] = true;
+             } else {
+               d = _this2.replaceItem(d.update({
+                 comment: d.newComment,
+                 newComment: undefined,
+                 newState: undefined
+               }));
+             }
 
-       var _maxWayNodes = 2000;
+             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
 
-       function authLoading() {
-         dispatch$6.call('authLoading');
-       }
+           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();
+         }
+       };
 
-       function authDone() {
-         dispatch$6.call('authDone');
-       }
+       var tiler$5 = utilTiler();
+       var dispatch$6 = dispatch$8('loaded');
+       var _tileZoom$2 = 14;
+       var _impOsmUrls = {
+         ow: 'https://grab.community.improve-osm.org/directionOfFlowService',
+         mr: 'https://grab.community.improve-osm.org/missingGeoService',
+         tr: 'https://grab.community.improve-osm.org/turnRestrictionService'
+       };
+       var _impOsmData = {
+         icons: {}
+       }; // This gets reassigned if reset
 
-       function abortRequest$5(controllerOrXHR) {
-         if (controllerOrXHR) {
-           controllerOrXHR.abort();
-         }
-       }
+       var _cache$1;
 
-       function hasInflightRequests(cache) {
-         return Object.keys(cache.inflight).length;
+       function abortRequest$5(i) {
+         Object.values(i).forEach(function (controller) {
+           if (controller) {
+             controller.abort();
+           }
+         });
        }
 
-       function abortUnwantedRequests$3(cache, visibleTiles) {
-         Object.keys(cache.inflight).forEach(function (k) {
-           if (cache.toLoad[k]) return;
-           if (visibleTiles.find(function (tile) {
+       function abortUnwantedRequests$2(cache, tiles) {
+         Object.keys(cache.inflightTile).forEach(function (k) {
+           var wanted = tiles.find(function (tile) {
              return k === tile.id;
-           })) return;
-           abortRequest$5(cache.inflight[k]);
-           delete cache.inflight[k];
-         });
-       }
+           });
 
-       function getLoc(attrs) {
-         var lon = attrs.lon && attrs.lon.value;
-         var lat = attrs.lat && attrs.lat.value;
-         return [parseFloat(lon), parseFloat(lat)];
+           if (!wanted) {
+             abortRequest$5(cache.inflightTile[k]);
+             delete cache.inflightTile[k];
+           }
+         });
        }
 
-       function getNodes(obj) {
-         var elems = obj.getElementsByTagName('nd');
-         var nodes = new Array(elems.length);
-
-         for (var i = 0, l = elems.length; i < l; i++) {
-           nodes[i] = 'n' + elems[i].attributes.ref.value;
-         }
+       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
 
-         return nodes;
-       }
 
-       function getNodesJSON(obj) {
-         var elems = obj.nodes;
-         var nodes = new Array(elems.length);
+       function updateRtree$2(item, replace) {
+         _cache$1.rtree.remove(item, function (a, b) {
+           return a.data.id === b.data.id;
+         });
 
-         for (var i = 0, l = elems.length; i < l; i++) {
-           nodes[i] = 'n' + elems[i];
+         if (replace) {
+           _cache$1.rtree.insert(item);
          }
-
-         return nodes;
        }
 
-       function getTags(obj) {
-         var elems = obj.getElementsByTagName('tag');
-         var tags = {};
-
-         for (var i = 0, l = elems.length; i < l; i++) {
-           var attrs = elems[i].attributes;
-           tags[attrs.k.value] = attrs.v.value;
-         }
-
-         return tags;
+       function linkErrorObject(d) {
+         return "<a class=\"error_object_link\">".concat(d, "</a>");
        }
 
-       function getMembers(obj) {
-         var elems = obj.getElementsByTagName('member');
-         var members = new Array(elems.length);
-
-         for (var i = 0, l = elems.length; i < l; i++) {
-           var attrs = elems[i].attributes;
-           members[i] = {
-             id: attrs.type.value[0] + attrs.ref.value,
-             type: attrs.type.value,
-             role: attrs.role.value
-           };
-         }
-
-         return members;
+       function linkEntity(d) {
+         return "<a class=\"error_entity_link\">".concat(d, "</a>");
        }
 
-       function getMembersJSON(obj) {
-         var elems = obj.members;
-         var members = new Array(elems.length);
-
-         for (var i = 0, l = elems.length; i < l; i++) {
-           var attrs = elems[i];
-           members[i] = {
-             id: attrs.type[0] + attrs.ref,
-             type: attrs.type,
-             role: attrs.role
-           };
+       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];
          }
-
-         return members;
        }
 
-       function getVisible(attrs) {
-         return !attrs.visible || attrs.visible.value !== 'false';
-       }
+       function relativeBearing(p1, p2) {
+         var angle = Math.atan2(p2.lon - p1.lon, p2.lat - p1.lat);
 
-       function parseComments(comments) {
-         var parsedComments = []; // for each comment
+         if (angle < 0) {
+           angle += 2 * Math.PI;
+         } // Return degrees
 
-         for (var i = 0; i < comments.length; i++) {
-           var comment = comments[i];
 
-           if (comment.nodeName === 'comment') {
-             var childNodes = comment.childNodes;
-             var parsedComment = {};
+         return angle * 180 / Math.PI;
+       } // Assuming range [0,360)
 
-             for (var j = 0; j < childNodes.length; j++) {
-               var node = childNodes[j];
-               var nodeName = node.nodeName;
-               if (nodeName === '#text') continue;
-               parsedComment[nodeName] = node.textContent;
 
-               if (nodeName === 'uid') {
-                 var uid = node.textContent;
+       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
 
-                 if (uid && !_userCache.user[uid]) {
-                   _userCache.toLoad[uid] = true;
-                 }
-               }
-             }
 
-             if (parsedComment) {
-               parsedComments.push(parsedComment);
-             }
-           }
-         }
+       function preventCoincident$1(loc, bumpUp) {
+         var coincident = false;
 
-         return parsedComments;
-       }
+         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 encodeNoteRtree(note) {
-         return {
-           minX: note.loc[0],
-           minY: note.loc[1],
-           maxX: note.loc[0],
-           maxY: note.loc[1],
-           data: note
-         };
+         return loc;
        }
 
-       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
+       var serviceImproveOSM = {
+         title: 'improveOSM',
+         init: function init() {
+           _mainFileFetcher.get('qa_data').then(function (d) {
+             return _impOsmData = d.improveOSM;
            });
+
+           if (!_cache$1) {
+             this.reset();
+           }
+
+           this.event = utilRebind(this, dispatch$6, 'on');
          },
-         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)
-           });
+         reset: function reset() {
+           if (_cache$1) {
+             Object.values(_cache$1.inflightTile).forEach(abortRequest$5);
+           }
+
+           _cache$1 = {
+             data: {},
+             loadedTile: {},
+             inflightTile: {},
+             inflightPost: {},
+             closed: {},
+             rtree: new RBush()
+           };
          },
-         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)
-           });
-         }
-       };
+         loadIssues: function loadIssues(projection) {
+           var _this = this;
 
-       function parseJSON(payload, callback, options) {
-         options = Object.assign({
-           skipSeen: true
-         }, options);
+           var options = {
+             client: 'iD',
+             status: 'OPEN',
+             zoom: '19' // Use a high zoom so that clusters aren't returned
 
-         if (!payload) {
-           return callback({
-             message: 'No JSON',
-             status: -1
-           });
-         }
+           }; // determine the needed tiles to cover the view
 
-         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;
+           var tiles = tiler$5.zoomExtent([_tileZoom$2, _tileZoom$2]).getTiles(projection); // abort inflight requests that are no longer needed
 
-           for (var i = 0; i < children.length; i++) {
-             result = parseChild(children[i]);
-             if (result) results.push(result);
-           }
+           abortUnwantedRequests$2(_cache$1, tiles); // issue new requests..
 
-           callback(null, results);
-         });
+           tiles.forEach(function (tile) {
+             if (_cache$1.loadedTile[tile.id] || _cache$1.inflightTile[tile.id]) return;
 
-         _deferred.add(handle);
+             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 parseChild(child) {
-           var parser = jsonparsers[child.type];
-           if (!parser) return null;
-           var uid;
-           uid = osmEntity.id.fromOSM(child.type, child.id);
+             var params = Object.assign({}, options, {
+               east: east,
+               south: south,
+               west: west,
+               north: north
+             }); // 3 separate requests to store for each tile
 
-           if (options.skipSeen) {
-             if (_tileCache.seen[uid]) return null; // avoid reparsing a "seen" entity
+             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];
 
-             _tileCache.seen[uid] = true;
-           }
+                 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
 
-           return parser(child, uid);
-         }
-       }
 
-       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 (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 coincident = false;
-           var epsilon = 0.00001;
+                     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
 
-           do {
-             if (coincident) {
-               props.loc = geoVecAdd(props.loc, [epsilon, epsilon]);
-             }
 
-             var bbox = geoExtent(props.loc).bbox();
-             coincident = _noteCache.rtree.search(bbox).length;
-           } while (coincident); // parse note contents
+                     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;
 
-           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
+                     _cache$1.rtree.insert(encodeIssueRtree$1(d));
+                   });
+                 } // Tiles at high zoom == missing roads
 
-             if (nodeName === 'comments') {
-               props[nodeName] = parseComments(node.childNodes);
-             } else {
-               props[nodeName] = node.textContent;
-             }
-           }
 
-           var note = new osmNote(props);
-           var item = encodeNoteRtree(note);
-           _noteCache.note[note.id] = note;
+                 if (data.tiles) {
+                   data.tiles.forEach(function (feature) {
+                     var type = feature.type,
+                         x = feature.x,
+                         y = feature.y,
+                         numberOfTrips = feature.numberOfTrips;
+                     var geoType = type.toLowerCase();
+                     var itemId = "".concat(geoType).concat(x).concat(y).concat(numberOfTrips); // Average of recorded points should land on the missing geometry
+                     // Missing geometry could happen to land on another error
+
+                     var loc = pointAverage(feature.points);
+                     loc = preventCoincident$1(loc, false);
+                     var d = new QAItem(loc, _this, "".concat(k, "-").concat(geoType), itemId, {
+                       issueKey: k,
+                       identifier: {
+                         x: x,
+                         y: y
+                       }
+                     });
+                     d.replacements = {
+                       num_trips: numberOfTrips,
+                       geometry_type: _t("QA.improveOSM.geometry_types.".concat(geoType))
+                     }; // -1 trips indicates data came from a 3rd party
+
+                     if (numberOfTrips === -1) {
+                       d.desc = _t('QA.improveOSM.error_types.mr.description_alt', d.replacements);
+                     }
 
-           _noteCache.rtree.insert(item);
+                     _cache$1.data[d.id] = d;
 
-           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');
+                     _cache$1.rtree.insert(encodeIssueRtree$1(d));
+                   });
+                 } // Entities at high zoom == turn restrictions
 
-           if (img && img[0] && img[0].getAttribute('href')) {
-             user.image_url = img[0].getAttribute('href');
-           }
 
-           var changesets = obj.getElementsByTagName('changesets');
+                 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
 
-           if (changesets && changesets[0] && changesets[0].getAttribute('count')) {
-             user.changesets_count = changesets[0].getAttribute('count');
-           }
+                     var loc = preventCoincident$1([point.lon, point.lat], true); // Elements are presented in a strange way
 
-           var blocks = obj.getElementsByTagName('blocks');
+                     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
 
-           if (blocks && blocks[0]) {
-             var received = blocks[0].getElementsByTagName('received');
+                     var _segments$0$points = _slicedToArray(segments[0].points, 2),
+                         p1 = _segments$0$points[0],
+                         p2 = _segments$0$points[1];
 
-             if (received && received[0] && received[0].getAttribute('active')) {
-               user.active_blocks = received[0].getAttribute('active');
-             }
-           }
+                     var dir_of_travel = cardinalDirection(relativeBearing(p1, p2)); // Variables used in the description
 
-           _userCache.user[uid] = user;
-           delete _userCache.toLoad[uid];
-           return user;
-         }
-       };
+                     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;
 
-       function parseXML(xml, callback, options) {
-         options = Object.assign({
-           skipSeen: true
-         }, options);
+                     _cache$1.rtree.insert(encodeIssueRtree$1(d));
 
-         if (!xml || !xml.childNodes) {
-           return callback({
-             message: 'No XML',
-             status: -1
-           });
-         }
+                     dispatch$6.call('loaded');
+                   });
+                 }
+               })["catch"](function () {
+                 delete _cache$1.inflightTile[tile.id][k];
 
-         var root = xml.childNodes[0];
-         var children = root.childNodes;
-         var handle = window.requestIdleCallback(function () {
-           var results = [];
-           var result;
+                 if (!Object.keys(_cache$1.inflightTile[tile.id]).length) {
+                   delete _cache$1.inflightTile[tile.id];
+                   _cache$1.loadedTile[tile.id] = true;
+                 }
+               });
+             });
+             _cache$1.inflightTile[tile.id] = requests;
+           });
+         },
+         getComments: function getComments(item) {
+           var _this2 = this;
 
-           for (var i = 0; i < children.length; i++) {
-             result = parseChild(children[i]);
-             if (result) results.push(result);
+           // If comments already retrieved no need to do so again
+           if (item.comments) {
+             return Promise.resolve(item);
            }
 
-           callback(null, results);
-         });
-
-         _deferred.add(handle);
+           var key = item.issueKey;
+           var qParams = {};
 
-         function parseChild(child) {
-           var parser = parsers[child.nodeName];
-           if (!parser) return null;
-           var uid;
+           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 (child.nodeName === 'user') {
-             uid = child.attributes.id.value;
+           var url = "".concat(_impOsmUrls[key], "/retrieveComments?") + utilQsString(qParams);
 
-             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);
+           var cacheComments = function cacheComments(data) {
+             // Assign directly for immediate use afterwards
+             // comments are served newest to oldest
+             item.comments = data.comments ? data.comments.reverse() : [];
 
-             if (options.skipSeen) {
-               if (_tileCache.seen[uid]) return null; // avoid reparsing a "seen" entity
+             _this2.replaceItem(item);
+           };
 
-               _tileCache.seen[uid] = true;
-             }
+           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);
            }
 
-           return parser(child, uid);
-         }
-       } // replace or remove note from rtree
+           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
 
 
-       function updateRtree$3(item, replace) {
-         _noteCache.rtree.remove(item, function isEql(a, b) {
-           return a.data.id === b.data.id;
-         });
+           serviceOsm.userDetails(sendPayload.bind(this));
 
-         if (replace) {
-           _noteCache.rtree.insert(item);
-         }
-       }
+           function sendPayload(err, user) {
+             var _this3 = this;
 
-       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 (err) {
+               return callback(err, d);
              }
 
-             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 key = d.issueKey;
+             var url = "".concat(_impOsmUrls[key], "/comment");
+             var payload = {
+               username: user.display_name,
+               targetIds: [d.identifier]
+             };
 
-       var serviceOsm = {
-         init: function init() {
-           utilRebind(this, dispatch$6, 'on');
-         },
-         reset: function reset() {
-           Array.from(_deferred).forEach(function (handle) {
-             window.cancelIdleCallback(handle);
+             if (d.newStatus) {
+               payload.status = d.newStatus;
+               payload.text = 'status changed';
+             } // Comment take place of default text
 
-             _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;
 
-           function done(err, payload) {
-             if (that.getConnectionId() !== cid) {
-               if (callback) callback({
-                 message: 'Connection Switched',
-                 status: -1
-               });
-               return;
+             if (d.newComment) {
+               payload.text = d.newComment;
              }
 
-             var isAuthenticated = that.authenticated(); // 400 Bad Request, 401 Unauthorized, 403 Forbidden
-             // Logout and retry the request..
+             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 (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 (!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 (callback) {
-                 if (err) {
-                   return callback(err);
-                 } else {
-                   if (path.indexOf('.json') !== -1) {
-                     return parseJSON(payload, callback, options);
-                   } else {
-                     return parseXML(payload, callback, options);
+                 _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;
                  }
                }
-             }
-           }
 
-           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);
+               if (callback) callback(null, d);
              })["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);
-               }
+               delete _cache$1.inflightPost[d.id];
+               if (callback) callback(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);
+         // 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;
+           });
          },
-         // 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);
+         // 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];
          },
-         // 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
+         // 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
 
-             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);
-             });
-           });
+           return issue;
          },
-         // 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;
+         // 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;
+         }
+       };
 
-           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));
-           }
+       var defaults$5 = 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
+           };
+         }
 
-           function createdChangeset(err, changesetID) {
-             _changeset.inflight = null;
+         function changeDefaults(newDefaults) {
+           module.exports.defaults = newDefaults;
+         }
+
+         module.exports = {
+           defaults: getDefaults(),
+           getDefaults: getDefaults,
+           changeDefaults: changeDefaults
+         };
+       });
 
-             if (err) {
-               return callback(err, changeset);
-             }
+       /**
+        * Helpers
+        */
+       var escapeTest = /[&<>"']/;
+       var escapeReplace = /[&<>"']/g;
+       var escapeTestNoEncode = /[<>"']|&(?!#?\w+;)/;
+       var escapeReplaceNoEncode = /[<>"']|&(?!#?\w+;)/g;
+       var escapeReplacements = {
+         '&': '&amp;',
+         '<': '&lt;',
+         '>': '&gt;',
+         '"': '&quot;',
+         "'": '&#39;'
+       };
 
-             _changeset.open = changesetID;
-             changeset = changeset.update({
-               id: changesetID
-             }); // Upload the changeset..
+       var getEscapeReplacement = function getEscapeReplacement(ch) {
+         return escapeReplacements[ch];
+       };
 
-             var options = {
-               method: 'POST',
-               path: '/api/0.6/changeset/' + changesetID + '/upload',
-               options: {
-                 header: {
-                   'Content-Type': 'text/xml'
-                 }
-               },
-               content: JXON.stringify(changeset.osmChangeJXON(changes))
-             };
-             _changeset.inflight = oauth.xhr(options, wrapcb(this, uploadedChangeset, cid));
+       function 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);
            }
+         }
 
-           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
+         return html;
+       }
 
-             window.setTimeout(function () {
-               callback(null, changeset);
-             }, 2500);
-             _changeset.open = null; // At this point, we don't really care if the connection was switched..
-             // Only try to close the changeset if we're still talking to the same server.
+       var unescapeTest = /&(#(?:\d+)|(?:#x[0-9A-Fa-f]+)|(?:\w+));?/ig;
 
-             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);
-             }
-           });
+       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 (cached.length || !this.authenticated()) {
-             callback(undefined, cached);
-             if (!this.authenticated()) return; // require auth
+           if (n.charAt(0) === '#') {
+             return n.charAt(1) === 'x' ? String.fromCharCode(parseInt(n.substring(2), 16)) : String.fromCharCode(+n.substring(1));
            }
 
-           utilArrayChunk(toLoad, 150).forEach(function (arr) {
-             oauth.xhr({
-               method: 'GET',
-               path: '/api/0.6/users?users=' + arr.join()
-             }, wrapcb(this, done, _connectionID));
-           }.bind(this));
+           return '';
+         });
+       }
 
-           function done(err, xml) {
-             if (err) {
-               return callback(err);
-             }
+       var caret = /(^|[^\[])\^/g;
 
-             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]);
+       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;
+       }
 
-           oauth.xhr({
-             method: 'GET',
-             path: '/api/0.6/user/' + uid
-           }, wrapcb(this, done, _connectionID));
+       var nonWordAndColonTest = /[^\w:]/g;
+       var originIndependentUrl = /^$|^[a-z][a-z0-9+.-]*:|^[?#]/i;
 
-           function done(err, xml) {
-             if (err) {
-               return callback(err);
-             }
+       function cleanUrl$1(sanitize, base, href) {
+         if (sanitize) {
+           var prot;
 
-             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);
+           try {
+             prot = decodeURIComponent(unescape$2(href)).replace(nonWordAndColonTest, '').toLowerCase();
+           } catch (e) {
+             return null;
            }
 
-           oauth.xhr({
-             method: 'GET',
-             path: '/api/0.6/user/details'
-           }, wrapcb(this, done, _connectionID));
+           if (prot.indexOf('javascript:') === 0 || prot.indexOf('vbscript:') === 0 || prot.indexOf('data:') === 0) {
+             return null;
+           }
+         }
 
-           function done(err, xml) {
-             if (err) {
-               return callback(err);
-             }
+         if (base && !originIndependentUrl.test(href)) {
+           href = resolveUrl$1(base, href);
+         }
 
-             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);
-           }
+         try {
+           href = encodeURI(href).replace(/%25/g, '%');
+         } catch (e) {
+           return null;
+         }
 
-           this.userDetails(wrapcb(this, gotDetails, _connectionID));
+         return href;
+       }
 
-           function gotDetails(err, user) {
-             if (err) {
-               return callback(err);
-             }
+       var baseUrls = {};
+       var justDomain = /^[^:]+:\/*[^/]*$/;
+       var protocol = /^([^:]+:)[\s\S]*$/;
+       var domain = /^([^:]+:\/*[^/]*)[\s\S]*$/;
 
-             oauth.xhr({
-               method: 'GET',
-               path: '/api/0.6/changesets?user=' + user.id
-             }, wrapcb(this, done, _connectionID));
+       function resolveUrl$1(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 done(err, xml) {
-             if (err) {
-               return callback(err);
-             }
+         base = baseUrls[' ' + base];
+         var relativeBase = base.indexOf(':') === -1;
 
-             _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);
+         if (href.substring(0, 2) === '//') {
+           if (relativeBase) {
+             return href;
            }
-         },
-         // Fetch the status of the OSM API
-         // GET /api/capabilities
-         status: function status(callback) {
-           var url = urlroot + '/api/capabilities';
-           var errback = wrapcb(this, done, _connectionID);
-           d3_xml(url).then(function (data) {
-             errback(null, data);
-           })["catch"](function (err) {
-             errback(err.message);
-           });
-
-           function done(err, xml) {
-             if (err) {
-               // the status is null if no response could be retrieved
-               return callback(err, null);
-             } // update blocklists
 
+           return base.replace(protocol, '$1') + href;
+         } else if (href.charAt(0) === '/') {
+           if (relativeBase) {
+             return href;
+           }
 
-             var elements = xml.getElementsByTagName('blacklist');
-             var regexes = [];
+           return base.replace(domain, '$1') + href;
+         } else {
+           return base + href;
+         }
+       }
 
-             for (var i = 0; i < elements.length; i++) {
-               var regexString = elements[i].getAttribute('regex'); // needs unencode?
+       var noopTest$1 = {
+         exec: function noopTest() {}
+       };
 
-               if (regexString) {
-                 try {
-                   var regex = new RegExp(regexString);
-                   regexes.push(regex);
-                 } catch (e) {
-                   /* noop */
-                 }
-               }
-             }
+       function merge$2(obj) {
+         var i = 1,
+             target,
+             key;
 
-             if (regexes.length) {
-               _imageryBlocklists = regexes;
-             }
+         for (; i < arguments.length; i++) {
+           target = arguments[i];
 
-             if (_rateLimitError) {
-               return callback(_rateLimitError, 'rateLimited');
-             } else {
-               var waynodes = xml.getElementsByTagName('waynodes');
-               var maxWayNodes = waynodes.length && parseInt(waynodes[0].getAttribute('maximum'), 10);
-               if (maxWayNodes && isFinite(maxWayNodes)) _maxWayNodes = maxWayNodes;
-               var apiStatus = xml.getElementsByTagName('status');
-               var val = apiStatus[0].getAttribute('api');
-               return callback(undefined, val);
+           for (key in target) {
+             if (Object.prototype.hasOwnProperty.call(target, key)) {
+               obj[key] = target[key];
              }
            }
-         },
-         // 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);
-                 }
-               });
-             }, 500);
-           }
-
-           this.throttledReloadApiStatus();
-         },
-         // Returns the maximum number of nodes a single way can have
-         maxWayNodes: function maxWayNodes() {
-           return _maxWayNodes;
-         },
-         // Load data (entities) from the API in tiles
-         // GET /api/0.6/map?bbox=
-         loadTiles: function loadTiles(projection, callback) {
-           if (_off) return; // determine the needed tiles to cover the view
-
-           var tiles = tiler$5.zoomExtent([_tileZoom$3, _tileZoom$3]).getTiles(projection); // abort inflight requests that are no longer needed
-
-           var hadRequests = hasInflightRequests(_tileCache);
-           abortUnwantedRequests$3(_tileCache, tiles);
-
-           if (hadRequests && !hasInflightRequests(_tileCache)) {
-             dispatch$6.call('loaded'); // stop the spinner
-           } // issue new requests..
+         }
 
+         return obj;
+       }
 
-           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;
+       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;
 
-           if (!hasInflightRequests(_tileCache)) {
-             dispatch$6.call('loading'); // start the spinner
+           while (--curr >= 0 && str[curr] === '\\') {
+             escaped = !escaped;
            }
 
-           var path = '/api/0.6/map.json?bbox=';
-           var options = {
-             skipSeen: true
-           };
-           _tileCache.inflight[tile.id] = this.loadFromAPI(path + tile.extent.toParam(), tileCallback, options);
-
-           function tileCallback(err, parsed) {
-             delete _tileCache.inflight[tile.id];
-
-             if (!err) {
-               delete _tileCache.toLoad[tile.id];
-               _tileCache.loaded[tile.id] = true;
-               var bbox = tile.extent.bbox();
-               bbox.id = tile.id;
+           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;
 
-               _tileCache.rtree.insert(bbox);
-             }
+         if (cells.length > count) {
+           cells.splice(count);
+         } else {
+           while (cells.length < count) {
+             cells.push('');
+           }
+         }
 
-             if (callback) {
-               callback(err, Object.assign({
-                 data: parsed
-               }, tile));
-             }
+         for (; i < cells.length; i++) {
+           // leading or trailing whitespace is ignored per the gfm spec
+           cells[i] = cells[i].trim().replace(/\\\|/g, '|');
+         }
 
-             if (!hasInflightRequests(_tileCache)) {
-               dispatch$6.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$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$3]).getTiles(projection);
-           tiles.forEach(function (tile) {
-             if (_tileCache.toLoad[tile.id] || _tileCache.loaded[tile.id] || _tileCache.inflight[tile.id]) return;
-             _tileCache.toLoad[tile.id] = true;
-             this.loadTile(tile, callback);
-           }, this);
-         },
-         // Load notes from the API in tiles
-         // GET /api/0.6/notes?bbox=
-         loadNotes: function loadNotes(projection, noteOptions) {
-           noteOptions = Object.assign({
-             limit: 10000,
-             closed: 7
-           }, noteOptions);
-           if (_off) return;
-           var that = this;
-           var path = '/api/0.6/notes?limit=' + noteOptions.limit + '&closed=' + noteOptions.closed + '&bbox=';
+         return cells;
+       } // Remove trailing 'c's. Equivalent to str.replace(/c*$/, '').
+       // /c*$/ is vulnerable to REDOS.
+       // invert: Remove suffix of non-c chars instead. Default falsey.
 
-           var throttleLoadUsers = throttle(function () {
-             var uids = Object.keys(_userCache.toLoad);
-             if (!uids.length) return;
-             that.loadUsers(uids, function () {}); // eagerly load user details
-           }, 750); // determine the needed tiles to cover the view
 
+       function rtrim$1(str, c, invert) {
+         var l = str.length;
 
-           var tiles = tiler$5.zoomExtent([_noteZoom, _noteZoom]).getTiles(projection); // abort inflight requests that are no longer needed
+         if (l === 0) {
+           return '';
+         } // Length of suffix matching the invert condition.
 
-           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];
+         var suffLen = 0; // Step left until we fail to match the invert condition.
 
-               if (!err) {
-                 _noteCache.loaded[tile.id] = true;
-               }
+         while (suffLen < l) {
+           var currChar = str.charAt(l - suffLen - 1);
 
-               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);
+           if (currChar === c && !invert) {
+             suffLen++;
+           } else if (currChar !== c && invert) {
+             suffLen++;
+           } else {
+             break;
            }
+         }
 
-           if (_noteCache.inflightPost[note.id]) {
-             return callback({
-               message: 'Note update already inflight',
-               status: -2
-             }, note);
-           }
+         return str.substr(0, l - suffLen);
+       }
 
-           if (!note.loc[0] || !note.loc[1] || !note.newComment) return; // location & description required
+       function findClosingBracket$1(str, b) {
+         if (str.indexOf(b[1]) === -1) {
+           return -1;
+         }
 
-           var comment = note.newComment;
+         var l = str.length;
+         var level = 0,
+             i = 0;
+
+         for (; i < l; i++) {
+           if (str[i] === '\\') {
+             i++;
+           } else if (str[i] === b[0]) {
+             level++;
+           } else if (str[i] === b[1]) {
+             level--;
 
-           if (note.newCategory && note.newCategory !== 'None') {
-             comment += ' #' + note.newCategory;
+             if (level < 0) {
+               return i;
+             }
            }
+         }
 
-           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));
+         return -1;
+       }
 
-           function done(err, xml) {
-             delete _noteCache.inflightPost[note.id];
+       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
 
-             if (err) {
-               return callback(err);
-             } // we get the updated note back, remove from caches and reparse..
 
+       function repeatString$1(pattern, count) {
+         if (count < 1) {
+           return '';
+         }
 
-             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);
-           }
+         var result = '';
 
-           if (_noteCache.inflightPost[note.id]) {
-             return callback({
-               message: 'Note update already inflight',
-               status: -2
-             }, note);
+         while (count > 1) {
+           if (count & 1) {
+             result += pattern;
            }
 
-           var action;
-
-           if (note.status !== 'closed' && newStatus === 'closed') {
-             action = 'close';
-           } else if (note.status !== 'open' && newStatus === 'open') {
-             action = 'reopen';
-           } else {
-             action = 'comment';
-             if (!note.newComment) return; // when commenting, comment required
-           }
+           count >>= 1;
+           pattern += pattern;
+         }
 
-           var path = '/api/0.6/notes/' + note.id + '/' + action;
+         return result + pattern;
+       }
 
-           if (note.newComment) {
-             path += '?' + utilQsString({
-               text: note.newComment
-             });
-           }
+       var helpers = {
+         escape: escape$3,
+         unescape: unescape$2,
+         edit: edit$1,
+         cleanUrl: cleanUrl$1,
+         resolveUrl: resolveUrl$1,
+         noopTest: noopTest$1,
+         merge: merge$2,
+         splitCells: splitCells$1,
+         rtrim: rtrim$1,
+         findClosingBracket: findClosingBracket$1,
+         checkSanitizeDeprecation: checkSanitizeDeprecation$1,
+         repeatString: repeatString$1
+       };
 
-           _noteCache.inflightPost[note.id] = oauth.xhr({
-             method: 'POST',
-             path: path
-           }, wrapcb(this, done, _connectionID));
+       var defaults$4 = defaults$5.defaults;
+       var rtrim = helpers.rtrim,
+           splitCells = helpers.splitCells,
+           _escape = helpers.escape,
+           findClosingBracket = helpers.findClosingBracket;
 
-           function done(err, xml) {
-             delete _noteCache.inflightPost[note.id];
+       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 (err) {
-               return callback(err);
-             } // we get the updated note back, remove from caches and reparse..
+         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)
+           };
+         }
+       }
 
+       function indentCodeCompensation(raw, text) {
+         var matchIndentToCode = raw.match(/^(\s+)(?:```)/);
 
-             this.removeNote(note); // update closed note cache - used to populate `closed:note` changeset tag
+         if (matchIndentToCode === null) {
+           return text;
+         }
 
-             if (action === 'close') {
-               _noteCache.closed[note.id] = true;
-             } else if (action === 'reopen') {
-               delete _noteCache.closed[note.id];
-             }
+         var indentToCode = matchIndentToCode[1];
+         return text.split('\n').map(function (node) {
+           var matchIndentInNode = node.match(/^\s+/);
 
-             var options = {
-               skipSeen: false
-             };
-             return parseXML(xml, function (err, results) {
-               if (err) {
-                 return callback(err);
-               } else {
-                 return callback(undefined, results[0]);
-               }
-             }, options);
+           if (matchIndentInNode === null) {
+             return node;
            }
-         },
-         "switch": function _switch(options) {
-           urlroot = options.urlroot;
-           oauth.options(Object.assign({
-             url: urlroot,
-             loading: authLoading,
-             done: authDone
-           }, options));
-           this.reset();
-           this.userChangesets(function () {}); // eagerly load user details/changesets
 
-           dispatch$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
-               }
-             });
-             return target;
-           }
+           var _matchIndentInNode = _slicedToArray(matchIndentInNode, 1),
+               indentInNode = _matchIndentInNode[0];
 
-           if (!arguments.length) {
-             return {
-               tile: cloneCache(_tileCache),
-               note: cloneCache(_noteCache),
-               user: cloneCache(_userCache)
-             };
-           } // access caches directly for testing (e.g., loading notes rtree)
+           if (indentInNode.length >= indentToCode.length) {
+             return node.slice(indentToCode.length);
+           }
 
+           return node;
+         }).join('\n');
+       }
+       /**
+        * Tokenizer
+        */
 
-           if (obj === 'get') {
-             return {
-               tile: _tileCache,
-               note: _noteCache,
-               user: _userCache
-             };
-           }
 
-           if (obj.tile) {
-             _tileCache = obj.tile;
-             _tileCache.inflight = {};
-           }
+       var Tokenizer_1 = /*#__PURE__*/function () {
+         function Tokenizer(options) {
+           _classCallCheck$1(this, Tokenizer);
 
-           if (obj.note) {
-             _noteCache = obj.note;
-             _noteCache.inflight = {};
-             _noteCache.inflightPost = {};
-           }
+           this.options = options || defaults$4;
+         }
 
-           if (obj.user) {
-             _userCache = obj.user;
-           }
+         _createClass$1(Tokenizer, [{
+           key: "space",
+           value: function space(src) {
+             var cap = this.rules.block.newline.exec(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;
+             if (cap) {
+               if (cap[0].length > 1) {
+                 return {
+                   type: 'space',
+                   raw: cap[0]
+                 };
+               }
 
-           function done(err, res) {
-             if (err) {
-               if (callback) callback(err);
-               return;
+               return {
+                 raw: '\n'
+               };
              }
+           }
+         }, {
+           key: "code",
+           value: function code(src) {
+             var cap = this.rules.block.code.exec(src);
 
-             if (that.getConnectionId() !== cid) {
-               if (callback) callback({
-                 message: 'Connection Switched',
-                 status: -1
-               });
-               return;
+             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
+               };
              }
-
-             _rateLimitError = undefined;
-             dispatch$6.call('change');
-             if (callback) callback(err, res);
-             that.userChangesets(function () {}); // eagerly load user details/changesets
            }
+         }, {
+           key: "fences",
+           value: function fences(src) {
+             var cap = this.rules.block.fences.exec(src);
 
-           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
+             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);
 
-           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 (cap) {
+               var text = cap[2].trim(); // remove trailing #s
 
-       var _apibase = 'https://wiki.openstreetmap.org/w/api.php';
-       var _inflight$1 = {};
-       var _wikibaseCache = {};
-       var _localeIDs = {
-         en: false
-       };
+               if (/#$/.test(text)) {
+                 var trimmed = rtrim(text, '#');
 
-       var debouncedRequest = debounce(request, 500, {
-         leading: false
-       });
+                 if (this.options.pedantic) {
+                   text = trimmed.trim();
+                 } else if (!trimmed || / $/.test(trimmed)) {
+                   // CommonMark requires space before trailing #s
+                   text = trimmed.trim();
+                 }
+               }
 
-       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);
-         });
-       }
+               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);
 
-       var serviceOsmWikibase = {
-         init: function init() {
-           _inflight$1 = {};
-           _wikibaseCache = {};
-           _localeIDs = {};
-         },
-         reset: function reset() {
-           Object.values(_inflight$1).forEach(function (controller) {
-             controller.abort();
-           });
-           _inflight$1 = {};
-         },
+             if (cap) {
+               var item = {
+                 type: 'table',
+                 header: splitCells(cap[1].replace(/^ *| *\| *$/g, '')),
+                 align: cap[2].replace(/^ *|\| *$/g, '').split(/ *\| */),
+                 cells: cap[3] ? cap[3].replace(/\n$/, '').split('\n') : [],
+                 raw: cap[0]
+               };
 
-         /**
-          * 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 (item.header.length === item.align.length) {
+                 var l = item.align.length;
+                 var i;
 
-             if (locale && stmt.qualifiers && stmt.qualifiers.P26 && stmt.qualifiers.P26[0].datavalue.value.id === locale) {
-               localePick = stmt;
-             }
-           });
-           var result = localePick || preferredPick;
+                 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 (result) {
-             var datavalue = result.mainsnak.datavalue;
-             return datavalue.type === 'wikibase-entityid' ? datavalue.value.id : datavalue.value;
-           } else {
-             return undefined;
-           }
-         },
+                 l = item.cells.length;
 
-         /**
-          * 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;
+                 for (i = 0; i < l; i++) {
+                   item.cells[i] = splitCells(item.cells[i], item.header.length);
+                 }
 
-           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 item;
                }
-             });
+             }
            }
+         }, {
+           key: "hr",
+           value: function hr(src) {
+             var cap = this.rules.block.hr.exec(src);
 
-           if (rtypeSitelink) {
-             if (_wikibaseCache[rtypeSitelink]) {
-               result.rtype = _wikibaseCache[rtypeSitelink];
-             } else {
-               titles.push(rtypeSitelink);
+             if (cap) {
+               return {
+                 type: 'hr',
+                 raw: cap[0]
+               };
              }
            }
+         }, {
+           key: "blockquote",
+           value: function blockquote(src) {
+             var cap = this.rules.block.blockquote.exec(src);
 
-           if (keySitelink) {
-             if (_wikibaseCache[keySitelink]) {
-               result.key = _wikibaseCache[keySitelink];
-             } else {
-               titles.push(keySitelink);
+             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 (tagSitelink) {
-             if (_wikibaseCache[tagSitelink]) {
-               result.tag = _wikibaseCache[tagSitelink];
-             } else {
-               titles.push(tagSitelink);
-             }
-           }
+             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.
 
-           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 itemMatch = cap[0].match(this.rules.block.item);
+               var next = false,
+                   item,
+                   space,
+                   bcurr,
+                   bnext,
+                   addBack,
+                   loose,
+                   istask,
+                   ischecked,
+                   endMatch;
+               var l = itemMatch.length;
+               bcurr = this.rules.block.listItemStart.exec(itemMatch[0]);
 
+               for (var i = 0; i < l; i++) {
+                 item = itemMatch[i];
+                 raw = item;
+
+                 if (!this.options.pedantic) {
+                   // Determine if current item contains the end of the list
+                   endMatch = item.match(new RegExp('\\n\\s*\\n {0,' + (bcurr[0].length - 1) + '}\\S'));
+
+                   if (endMatch) {
+                     addBack = item.length - endMatch.index + itemMatch.slice(i + 1).join('\n').length;
+                     list.raw = list.raw.substring(0, list.raw.length - addBack);
+                     item = item.substring(0, endMatch.index);
+                     raw = item;
+                     l = i + 1;
+                   }
+                 } // Determine whether the next list item belongs here.
+                 // Backpedal if it does not belong in this list.
 
-           var obj = {
-             action: 'wbgetentities',
-             sites: 'wiki',
-             titles: titles.join('|'),
-             languages: params.langCodes.join('|'),
-             languagefallback: 1,
-             origin: '*',
-             format: 'json' // There is an MW Wikibase API bug https://phabricator.wikimedia.org/T212069
-             // We shouldn't use v1 until it gets fixed, but should switch to it afterwards
-             // formatversion: 2,
 
-           };
-           var url = _apibase + '?' + utilQsString(obj);
-           doRequest(url, function (err, d) {
-             if (err) {
-               callback(err);
-             } else if (!d.success || d.error) {
-               callback(d.error.messages.map(function (v) {
-                 return v.html['*'];
-               }).join('<br>'));
-             } else {
-               var localeID = false;
-               Object.values(d.entities).forEach(function (res) {
-                 if (res.missing !== '') {
-                   var title = res.sitelinks.wiki.title;
+                 if (i !== l - 1) {
+                   bnext = this.rules.block.listItemStart.exec(itemMatch[i + 1]);
 
-                   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 (!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 (localeSitelink) {
-                 // If locale ID is not found, store false to prevent repeated queries
-                 that.addLocale(params.langCodes[0], localeID);
-               }
+                   bcurr = bnext;
+                 } // Remove the list item's bullet
+                 // so it is seen as the next token.
 
-               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;
-             }
 
-             var entity = data.rtype || data.tag || data.key;
+                 space = item.length;
+                 item = item.replace(/^ *([*+-]|\d+[.)]) ?/, ''); // Outdent whatever the
+                 // list item contains. Hacky.
 
-             if (!entity) {
-               callback('No entity');
-               return;
-             }
+                 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
 
-             var i;
-             var description;
 
-             for (i in langCodes) {
-               var _code = langCodes[i];
+                 item = rtrim(item, '\n');
 
-               if (entity.descriptions[_code] && entity.descriptions[_code].language === _code) {
-                 description = entity.descriptions[_code];
-                 break;
-               }
-             }
+                 if (i !== l - 1) {
+                   raw = raw + '\n';
+                 } // Determine whether item is loose or not.
+                 // Use: /(^|\n)(?! )[^\n]+\n\n(?!\s*$)/
+                 // for discount behavior.
 
-             if (!description && Object.values(entity.descriptions).length) description = Object.values(entity.descriptions)[0]; // prepare result
 
-             var result = {
-               title: entity.title,
-               description: description ? description.value : '',
-               descriptionLocaleCode: description ? description.language : '',
-               editURL: 'https://wiki.openstreetmap.org/wiki/' + entity.title
-             }; // add image
+                 loose = next || /\n\n(?!\s*$)/.test(raw);
 
-             if (entity.claims) {
-               var imageroot;
-               var image = that.claimToValue(entity, 'P4', langCodes[0]);
+                 if (i !== l - 1) {
+                   next = raw.slice(-2) === '\n\n';
+                   if (!loose) loose = next;
+                 }
 
-               if (image) {
-                 imageroot = 'https://commons.wikimedia.org/w/index.php';
-               } else {
-                 image = that.claimToValue(entity, 'P28', langCodes[0]);
+                 if (loose) {
+                   list.loose = true;
+                 } // Check for task list items
 
-                 if (image) {
-                   imageroot = 'https://wiki.openstreetmap.org/w/index.php';
+
+                 if (this.options.gfm) {
+                   istask = /^\[[ xX]\] /.test(item);
+                   ischecked = undefined;
+
+                   if (istask) {
+                     ischecked = item[1] !== ' ';
+                     item = item.replace(/^\[[ xX]\] +/, '');
+                   }
                  }
-               }
 
-               if (imageroot && image) {
-                 result.imageURL = imageroot + '?' + utilQsString({
-                   title: 'Special:Redirect/file/' + image,
-                   width: 400
+                 list.items.push({
+                   type: 'list_item',
+                   raw: raw,
+                   task: istask,
+                   checked: ischecked,
+                   loose: loose,
+                   text: item
                  });
                }
-             } // 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.
 
+               return list;
+             }
+           }
+         }, {
+           key: "html",
+           value: function html(src) {
+             var cap = this.rules.block.html.exec(src);
 
-             var rtypeWiki = that.monolingualClaimToValueObj(data.rtype, 'P31');
-             var tagWiki = that.monolingualClaimToValueObj(data.tag, 'P31');
-             var keyWiki = that.monolingualClaimToValueObj(data.key, 'P31');
-             var wikis = [rtypeWiki, tagWiki, keyWiki];
+             if (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);
 
-             for (i in wikis) {
-               var wiki = wikis[i];
+             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);
 
-               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);
+             if (cap) {
+               var item = {
+                 type: 'table',
+                 header: splitCells(cap[1].replace(/^ *| *\| *$/g, '')),
+                 align: cap[2].replace(/^ *|\| *$/g, '').split(/ *\| */),
+                 cells: cap[3] ? cap[3].replace(/\n$/, '').split('\n') : []
+               };
 
-                 if (info) {
-                   result.wiki = info;
-                   break;
+               if (item.header.length === item.align.length) {
+                 item.raw = cap[0];
+                 var l = item.align.length;
+                 var i;
+
+                 for (i = 0; i < l; i++) {
+                   if (/^ *-+: *$/.test(item.align[i])) {
+                     item.align[i] = 'right';
+                   } else if (/^ *:-+: *$/.test(item.align[i])) {
+                     item.align[i] = 'center';
+                   } else if (/^ *:-+ *$/.test(item.align[i])) {
+                     item.align[i] = 'left';
+                   } else {
+                     item.align[i] = null;
+                   }
                  }
-               }
 
-               if (result.wiki) break;
-             }
+                 l = item.cells.length;
 
-             callback(null, result); // Helper method to get wiki info if a given language exists
+                 for (i = 0; i < l; i++) {
+                   item.cells[i] = splitCells(item.cells[i].replace(/^ *\| *| *\| *$/g, ''), item.header.length);
+                 }
 
-             function getWikiInfo(wiki, langCode, tKey) {
-               if (wiki && wiki[langCode]) {
-                 return {
-                   title: wiki[langCode],
-                   text: tKey,
-                   url: 'https://wiki.openstreetmap.org/wiki/' + wiki[langCode]
-                 };
+                 return item;
                }
              }
-           });
-         },
-         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;
-         }
-       };
+           }
+         }, {
+           key: "lheading",
+           value: function lheading(src) {
+             var cap = this.rules.block.lheading.exec(src);
 
-       var jsonpCache = {};
-       window.jsonpCache = jsonpCache;
-       function jsonpRequest(url, callback) {
-         var request = {
-           abort: function abort() {}
-         };
+             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);
 
-         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);
+             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);
 
-             request.abort = function () {
-               window.clearTimeout(t);
-             };
+             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);
 
-           return request;
-         }
+             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);
 
-         function rand() {
-           var chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
-           var c = '';
-           var i = -1;
+             if (cap) {
+               if (!inLink && /^<a /i.test(cap[0])) {
+                 inLink = true;
+               } else if (inLink && /^<\/a>/i.test(cap[0])) {
+                 inLink = false;
+               }
 
-           while (++i < 15) {
-             c += chars.charAt(Math.floor(Math.random() * 52));
+               if (!inRawBlock && /^<(pre|code|kbd|script)(\s|>)/i.test(cap[0])) {
+                 inRawBlock = true;
+               } else if (inRawBlock && /^<\/(pre|code|kbd|script)(\s|>)/i.test(cap[0])) {
+                 inRawBlock = false;
+               }
+
+               return {
+                 type: this.options.sanitize ? 'text' : 'html',
+                 raw: cap[0],
+                 inLink: inLink,
+                 inRawBlock: inRawBlock,
+                 text: this.options.sanitize ? this.options.sanitizer ? this.options.sanitizer(cap[0]) : _escape(cap[0]) : cap[0]
+               };
+             }
            }
+         }, {
+           key: "link",
+           value: function link(src) {
+             var cap = this.rules.inline.link.exec(src);
 
-           return c;
-         }
+             if (cap) {
+               var trimmedUrl = cap[2].trim();
 
-         function create(url) {
-           var e = url.match(/callback=(\w+)/);
-           var c = e ? e[1] : rand();
+               if (!this.options.pedantic && /^</.test(trimmedUrl)) {
+                 // commonmark requires matching angle brackets
+                 if (!/>$/.test(trimmedUrl)) {
+                   return;
+                 } // ending angle bracket cannot be escaped
 
-           jsonpCache[c] = function (data) {
-             if (jsonpCache[c]) {
-               callback(data);
-             }
 
-             finalize();
-           };
+                 var rtrimSlash = rtrim(trimmedUrl.slice(0, -1), '\\');
 
-           function finalize() {
-             delete jsonpCache[c];
-             script.remove();
-           }
+                 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] = '';
+                 }
+               }
 
-           request.abort = finalize;
-           return 'jsonpCache.' + c;
-         }
+               var href = cap[2];
+               var title = '';
 
-         var cb = create(url);
-         var script = select('head').append('script').attr('type', 'text/javascript').attr('src', url.replace(/(\{|%7B)callback(\}|%7D)/, cb));
-         return request;
-       }
+               if (this.options.pedantic) {
+                 // split pedantic href and title
+                 var link = /^([^'"]*[^\s])\s+(['"])(.*)\2/.exec(href);
 
-       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
+                 if (link) {
+                   href = link[1];
+                   title = link[3];
+                 }
+               } else {
+                 title = cap[3] ? cap[3].slice(1, -1) : '';
+               }
 
-       var maxHfov = 90; // zoom out degrees
+               href = href.trim();
 
-       var defaultHfov = 45;
-       var _hires = false;
-       var _resolution = 512; // higher numbers are slower - 512, 1024, 2048, 4096
+               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);
+                 }
+               }
 
-       var _currScene = 0;
+               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;
 
-       var _ssCache;
+             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()];
 
-       var _pannellumViewer;
+               if (!link || !link.href) {
+                 var text = cap[0].charAt(0);
+                 return {
+                   type: 'text',
+                   raw: text,
+                   text: text
+                 };
+               }
 
-       var _sceneOptions = {
-         showFullscreenCtrl: false,
-         autoLoad: true,
-         compass: true,
-         yaw: 0,
-         minHfov: minHfov,
-         maxHfov: maxHfov,
-         hfov: defaultHfov,
-         type: 'cubemap',
-         cubeMap: []
-       };
+               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
 
-       var _loadViewerPromise$2;
-       /**
-        * abortRequest().
-        */
+             if (match[3] && prevChar.match(/(?:[0-9A-Za-z\xAA\xB2\xB3\xB5\xB9\xBA\xBC-\xBE\xC0-\xD6\xD8-\xF6\xF8-\u02C1\u02C6-\u02D1\u02E0-\u02E4\u02EC\u02EE\u0370-\u0374\u0376\u0377\u037A-\u037D\u037F\u0386\u0388-\u038A\u038C\u038E-\u03A1\u03A3-\u03F5\u03F7-\u0481\u048A-\u052F\u0531-\u0556\u0559\u0560-\u0588\u05D0-\u05EA\u05EF-\u05F2\u0620-\u064A\u0660-\u0669\u066E\u066F\u0671-\u06D3\u06D5\u06E5\u06E6\u06EE-\u06FC\u06FF\u0710\u0712-\u072F\u074D-\u07A5\u07B1\u07C0-\u07EA\u07F4\u07F5\u07FA\u0800-\u0815\u081A\u0824\u0828\u0840-\u0858\u0860-\u086A\u08A0-\u08B4\u08B6-\u08C7\u0904-\u0939\u093D\u0950\u0958-\u0961\u0966-\u096F\u0971-\u0980\u0985-\u098C\u098F\u0990\u0993-\u09A8\u09AA-\u09B0\u09B2\u09B6-\u09B9\u09BD\u09CE\u09DC\u09DD\u09DF-\u09E1\u09E6-\u09F1\u09F4-\u09F9\u09FC\u0A05-\u0A0A\u0A0F\u0A10\u0A13-\u0A28\u0A2A-\u0A30\u0A32\u0A33\u0A35\u0A36\u0A38\u0A39\u0A59-\u0A5C\u0A5E\u0A66-\u0A6F\u0A72-\u0A74\u0A85-\u0A8D\u0A8F-\u0A91\u0A93-\u0AA8\u0AAA-\u0AB0\u0AB2\u0AB3\u0AB5-\u0AB9\u0ABD\u0AD0\u0AE0\u0AE1\u0AE6-\u0AEF\u0AF9\u0B05-\u0B0C\u0B0F\u0B10\u0B13-\u0B28\u0B2A-\u0B30\u0B32\u0B33\u0B35-\u0B39\u0B3D\u0B5C\u0B5D\u0B5F-\u0B61\u0B66-\u0B6F\u0B71-\u0B77\u0B83\u0B85-\u0B8A\u0B8E-\u0B90\u0B92-\u0B95\u0B99\u0B9A\u0B9C\u0B9E\u0B9F\u0BA3\u0BA4\u0BA8-\u0BAA\u0BAE-\u0BB9\u0BD0\u0BE6-\u0BF2\u0C05-\u0C0C\u0C0E-\u0C10\u0C12-\u0C28\u0C2A-\u0C39\u0C3D\u0C58-\u0C5A\u0C60\u0C61\u0C66-\u0C6F\u0C78-\u0C7E\u0C80\u0C85-\u0C8C\u0C8E-\u0C90\u0C92-\u0CA8\u0CAA-\u0CB3\u0CB5-\u0CB9\u0CBD\u0CDE\u0CE0\u0CE1\u0CE6-\u0CEF\u0CF1\u0CF2\u0D04-\u0D0C\u0D0E-\u0D10\u0D12-\u0D3A\u0D3D\u0D4E\u0D54-\u0D56\u0D58-\u0D61\u0D66-\u0D78\u0D7A-\u0D7F\u0D85-\u0D96\u0D9A-\u0DB1\u0DB3-\u0DBB\u0DBD\u0DC0-\u0DC6\u0DE6-\u0DEF\u0E01-\u0E30\u0E32\u0E33\u0E40-\u0E46\u0E50-\u0E59\u0E81\u0E82\u0E84\u0E86-\u0E8A\u0E8C-\u0EA3\u0EA5\u0EA7-\u0EB0\u0EB2\u0EB3\u0EBD\u0EC0-\u0EC4\u0EC6\u0ED0-\u0ED9\u0EDC-\u0EDF\u0F00\u0F20-\u0F33\u0F40-\u0F47\u0F49-\u0F6C\u0F88-\u0F8C\u1000-\u102A\u103F-\u1049\u1050-\u1055\u105A-\u105D\u1061\u1065\u1066\u106E-\u1070\u1075-\u1081\u108E\u1090-\u1099\u10A0-\u10C5\u10C7\u10CD\u10D0-\u10FA\u10FC-\u1248\u124A-\u124D\u1250-\u1256\u1258\u125A-\u125D\u1260-\u1288\u128A-\u128D\u1290-\u12B0\u12B2-\u12B5\u12B8-\u12BE\u12C0\u12C2-\u12C5\u12C8-\u12D6\u12D8-\u1310\u1312-\u1315\u1318-\u135A\u1369-\u137C\u1380-\u138F\u13A0-\u13F5\u13F8-\u13FD\u1401-\u166C\u166F-\u167F\u1681-\u169A\u16A0-\u16EA\u16EE-\u16F8\u1700-\u170C\u170E-\u1711\u1720-\u1731\u1740-\u1751\u1760-\u176C\u176E-\u1770\u1780-\u17B3\u17D7\u17DC\u17E0-\u17E9\u17F0-\u17F9\u1810-\u1819\u1820-\u1878\u1880-\u1884\u1887-\u18A8\u18AA\u18B0-\u18F5\u1900-\u191E\u1946-\u196D\u1970-\u1974\u1980-\u19AB\u19B0-\u19C9\u19D0-\u19DA\u1A00-\u1A16\u1A20-\u1A54\u1A80-\u1A89\u1A90-\u1A99\u1AA7\u1B05-\u1B33\u1B45-\u1B4B\u1B50-\u1B59\u1B83-\u1BA0\u1BAE-\u1BE5\u1C00-\u1C23\u1C40-\u1C49\u1C4D-\u1C7D\u1C80-\u1C88\u1C90-\u1CBA\u1CBD-\u1CBF\u1CE9-\u1CEC\u1CEE-\u1CF3\u1CF5\u1CF6\u1CFA\u1D00-\u1DBF\u1E00-\u1F15\u1F18-\u1F1D\u1F20-\u1F45\u1F48-\u1F4D\u1F50-\u1F57\u1F59\u1F5B\u1F5D\u1F5F-\u1F7D\u1F80-\u1FB4\u1FB6-\u1FBC\u1FBE\u1FC2-\u1FC4\u1FC6-\u1FCC\u1FD0-\u1FD3\u1FD6-\u1FDB\u1FE0-\u1FEC\u1FF2-\u1FF4\u1FF6-\u1FFC\u2070\u2071\u2074-\u2079\u207F-\u2089\u2090-\u209C\u2102\u2107\u210A-\u2113\u2115\u2119-\u211D\u2124\u2126\u2128\u212A-\u212D\u212F-\u2139\u213C-\u213F\u2145-\u2149\u214E\u2150-\u2189\u2460-\u249B\u24EA-\u24FF\u2776-\u2793\u2C00-\u2C2E\u2C30-\u2C5E\u2C60-\u2CE4\u2CEB-\u2CEE\u2CF2\u2CF3\u2CFD\u2D00-\u2D25\u2D27\u2D2D\u2D30-\u2D67\u2D6F\u2D80-\u2D96\u2DA0-\u2DA6\u2DA8-\u2DAE\u2DB0-\u2DB6\u2DB8-\u2DBE\u2DC0-\u2DC6\u2DC8-\u2DCE\u2DD0-\u2DD6\u2DD8-\u2DDE\u2E2F\u3005-\u3007\u3021-\u3029\u3031-\u3035\u3038-\u303C\u3041-\u3096\u309D-\u309F\u30A1-\u30FA\u30FC-\u30FF\u3105-\u312F\u3131-\u318E\u3192-\u3195\u31A0-\u31BF\u31F0-\u31FF\u3220-\u3229\u3248-\u324F\u3251-\u325F\u3280-\u3289\u32B1-\u32BF\u3400-\u4DBF\u4E00-\u9FFC\uA000-\uA48C\uA4D0-\uA4FD\uA500-\uA60C\uA610-\uA62B\uA640-\uA66E\uA67F-\uA69D\uA6A0-\uA6EF\uA717-\uA71F\uA722-\uA788\uA78B-\uA7BF\uA7C2-\uA7CA\uA7F5-\uA801\uA803-\uA805\uA807-\uA80A\uA80C-\uA822\uA830-\uA835\uA840-\uA873\uA882-\uA8B3\uA8D0-\uA8D9\uA8F2-\uA8F7\uA8FB\uA8FD\uA8FE\uA900-\uA925\uA930-\uA946\uA960-\uA97C\uA984-\uA9B2\uA9CF-\uA9D9\uA9E0-\uA9E4\uA9E6-\uA9FE\uAA00-\uAA28\uAA40-\uAA42\uAA44-\uAA4B\uAA50-\uAA59\uAA60-\uAA76\uAA7A\uAA7E-\uAAAF\uAAB1\uAAB5\uAAB6\uAAB9-\uAABD\uAAC0\uAAC2\uAADB-\uAADD\uAAE0-\uAAEA\uAAF2-\uAAF4\uAB01-\uAB06\uAB09-\uAB0E\uAB11-\uAB16\uAB20-\uAB26\uAB28-\uAB2E\uAB30-\uAB5A\uAB5C-\uAB69\uAB70-\uABE2\uABF0-\uABF9\uAC00-\uD7A3\uD7B0-\uD7C6\uD7CB-\uD7FB\uF900-\uFA6D\uFA70-\uFAD9\uFB00-\uFB06\uFB13-\uFB17\uFB1D\uFB1F-\uFB28\uFB2A-\uFB36\uFB38-\uFB3C\uFB3E\uFB40\uFB41\uFB43\uFB44\uFB46-\uFBB1\uFBD3-\uFD3D\uFD50-\uFD8F\uFD92-\uFDC7\uFDF0-\uFDFB\uFE70-\uFE74\uFE76-\uFEFC\uFF10-\uFF19\uFF21-\uFF3A\uFF41-\uFF5A\uFF66-\uFFBE\uFFC2-\uFFC7\uFFCA-\uFFCF\uFFD2-\uFFD7\uFFDA-\uFFDC]|\uD800[\uDC00-\uDC0B\uDC0D-\uDC26\uDC28-\uDC3A\uDC3C\uDC3D\uDC3F-\uDC4D\uDC50-\uDC5D\uDC80-\uDCFA\uDD07-\uDD33\uDD40-\uDD78\uDD8A\uDD8B\uDE80-\uDE9C\uDEA0-\uDED0\uDEE1-\uDEFB\uDF00-\uDF23\uDF2D-\uDF4A\uDF50-\uDF75\uDF80-\uDF9D\uDFA0-\uDFC3\uDFC8-\uDFCF\uDFD1-\uDFD5]|\uD801[\uDC00-\uDC9D\uDCA0-\uDCA9\uDCB0-\uDCD3\uDCD8-\uDCFB\uDD00-\uDD27\uDD30-\uDD63\uDE00-\uDF36\uDF40-\uDF55\uDF60-\uDF67]|\uD802[\uDC00-\uDC05\uDC08\uDC0A-\uDC35\uDC37\uDC38\uDC3C\uDC3F-\uDC55\uDC58-\uDC76\uDC79-\uDC9E\uDCA7-\uDCAF\uDCE0-\uDCF2\uDCF4\uDCF5\uDCFB-\uDD1B\uDD20-\uDD39\uDD80-\uDDB7\uDDBC-\uDDCF\uDDD2-\uDE00\uDE10-\uDE13\uDE15-\uDE17\uDE19-\uDE35\uDE40-\uDE48\uDE60-\uDE7E\uDE80-\uDE9F\uDEC0-\uDEC7\uDEC9-\uDEE4\uDEEB-\uDEEF\uDF00-\uDF35\uDF40-\uDF55\uDF58-\uDF72\uDF78-\uDF91\uDFA9-\uDFAF]|\uD803[\uDC00-\uDC48\uDC80-\uDCB2\uDCC0-\uDCF2\uDCFA-\uDD23\uDD30-\uDD39\uDE60-\uDE7E\uDE80-\uDEA9\uDEB0\uDEB1\uDF00-\uDF27\uDF30-\uDF45\uDF51-\uDF54\uDFB0-\uDFCB\uDFE0-\uDFF6]|\uD804[\uDC03-\uDC37\uDC52-\uDC6F\uDC83-\uDCAF\uDCD0-\uDCE8\uDCF0-\uDCF9\uDD03-\uDD26\uDD36-\uDD3F\uDD44\uDD47\uDD50-\uDD72\uDD76\uDD83-\uDDB2\uDDC1-\uDDC4\uDDD0-\uDDDA\uDDDC\uDDE1-\uDDF4\uDE00-\uDE11\uDE13-\uDE2B\uDE80-\uDE86\uDE88\uDE8A-\uDE8D\uDE8F-\uDE9D\uDE9F-\uDEA8\uDEB0-\uDEDE\uDEF0-\uDEF9\uDF05-\uDF0C\uDF0F\uDF10\uDF13-\uDF28\uDF2A-\uDF30\uDF32\uDF33\uDF35-\uDF39\uDF3D\uDF50\uDF5D-\uDF61]|\uD805[\uDC00-\uDC34\uDC47-\uDC4A\uDC50-\uDC59\uDC5F-\uDC61\uDC80-\uDCAF\uDCC4\uDCC5\uDCC7\uDCD0-\uDCD9\uDD80-\uDDAE\uDDD8-\uDDDB\uDE00-\uDE2F\uDE44\uDE50-\uDE59\uDE80-\uDEAA\uDEB8\uDEC0-\uDEC9\uDF00-\uDF1A\uDF30-\uDF3B]|\uD806[\uDC00-\uDC2B\uDCA0-\uDCF2\uDCFF-\uDD06\uDD09\uDD0C-\uDD13\uDD15\uDD16\uDD18-\uDD2F\uDD3F\uDD41\uDD50-\uDD59\uDDA0-\uDDA7\uDDAA-\uDDD0\uDDE1\uDDE3\uDE00\uDE0B-\uDE32\uDE3A\uDE50\uDE5C-\uDE89\uDE9D\uDEC0-\uDEF8]|\uD807[\uDC00-\uDC08\uDC0A-\uDC2E\uDC40\uDC50-\uDC6C\uDC72-\uDC8F\uDD00-\uDD06\uDD08\uDD09\uDD0B-\uDD30\uDD46\uDD50-\uDD59\uDD60-\uDD65\uDD67\uDD68\uDD6A-\uDD89\uDD98\uDDA0-\uDDA9\uDEE0-\uDEF2\uDFB0\uDFC0-\uDFD4]|\uD808[\uDC00-\uDF99]|\uD809[\uDC00-\uDC6E\uDC80-\uDD43]|[\uD80C\uD81C-\uD820\uD822\uD840-\uD868\uD86A-\uD86C\uD86F-\uD872\uD874-\uD879\uD880-\uD883][\uDC00-\uDFFF]|\uD80D[\uDC00-\uDC2E]|\uD811[\uDC00-\uDE46]|\uD81A[\uDC00-\uDE38\uDE40-\uDE5E\uDE60-\uDE69\uDED0-\uDEED\uDF00-\uDF2F\uDF40-\uDF43\uDF50-\uDF59\uDF5B-\uDF61\uDF63-\uDF77\uDF7D-\uDF8F]|\uD81B[\uDE40-\uDE96\uDF00-\uDF4A\uDF50\uDF93-\uDF9F\uDFE0\uDFE1\uDFE3]|\uD821[\uDC00-\uDFF7]|\uD823[\uDC00-\uDCD5\uDD00-\uDD08]|\uD82C[\uDC00-\uDD1E\uDD50-\uDD52\uDD64-\uDD67\uDD70-\uDEFB]|\uD82F[\uDC00-\uDC6A\uDC70-\uDC7C\uDC80-\uDC88\uDC90-\uDC99]|\uD834[\uDEE0-\uDEF3\uDF60-\uDF78]|\uD835[\uDC00-\uDC54\uDC56-\uDC9C\uDC9E\uDC9F\uDCA2\uDCA5\uDCA6\uDCA9-\uDCAC\uDCAE-\uDCB9\uDCBB\uDCBD-\uDCC3\uDCC5-\uDD05\uDD07-\uDD0A\uDD0D-\uDD14\uDD16-\uDD1C\uDD1E-\uDD39\uDD3B-\uDD3E\uDD40-\uDD44\uDD46\uDD4A-\uDD50\uDD52-\uDEA5\uDEA8-\uDEC0\uDEC2-\uDEDA\uDEDC-\uDEFA\uDEFC-\uDF14\uDF16-\uDF34\uDF36-\uDF4E\uDF50-\uDF6E\uDF70-\uDF88\uDF8A-\uDFA8\uDFAA-\uDFC2\uDFC4-\uDFCB\uDFCE-\uDFFF]|\uD838[\uDD00-\uDD2C\uDD37-\uDD3D\uDD40-\uDD49\uDD4E\uDEC0-\uDEEB\uDEF0-\uDEF9]|\uD83A[\uDC00-\uDCC4\uDCC7-\uDCCF\uDD00-\uDD43\uDD4B\uDD50-\uDD59]|\uD83B[\uDC71-\uDCAB\uDCAD-\uDCAF\uDCB1-\uDCB4\uDD01-\uDD2D\uDD2F-\uDD3D\uDE00-\uDE03\uDE05-\uDE1F\uDE21\uDE22\uDE24\uDE27\uDE29-\uDE32\uDE34-\uDE37\uDE39\uDE3B\uDE42\uDE47\uDE49\uDE4B\uDE4D-\uDE4F\uDE51\uDE52\uDE54\uDE57\uDE59\uDE5B\uDE5D\uDE5F\uDE61\uDE62\uDE64\uDE67-\uDE6A\uDE6C-\uDE72\uDE74-\uDE77\uDE79-\uDE7C\uDE7E\uDE80-\uDE89\uDE8B-\uDE9B\uDEA1-\uDEA3\uDEA5-\uDEA9\uDEAB-\uDEBB]|\uD83C[\uDD00-\uDD0C]|\uD83E[\uDFF0-\uDFF9]|\uD869[\uDC00-\uDEDD\uDF00-\uDFFF]|\uD86D[\uDC00-\uDF34\uDF40-\uDFFF]|\uD86E[\uDC00-\uDC1D\uDC20-\uDFFF]|\uD873[\uDC00-\uDEA1\uDEB0-\uDFFF]|\uD87A[\uDC00-\uDFE0]|\uD87E[\uDC00-\uDE1D]|\uD884[\uDC00-\uDF4A])/)) return;
+             var nextChar = match[1] || match[2] || '';
 
+             if (!nextChar || nextChar && (prevChar === '' || this.rules.inline.punctuation.exec(prevChar))) {
+               var lLength = match[0].length - 1;
+               var rDelim,
+                   rLength,
+                   delimTotal = lLength,
+                   midDelimTotal = 0;
+               var endReg = match[0][0] === '*' ? this.rules.inline.emStrong.rDelimAst : this.rules.inline.emStrong.rDelimUnd;
+               endReg.lastIndex = 0; // Clip maskedSrc to same section of string as src (move to lexer?)
 
-       function abortRequest$6(i) {
-         i.abort();
-       }
-       /**
-        * localeTimeStamp().
-        */
+               maskedSrc = maskedSrc.slice(-1 * src.length + lLength);
 
+               while ((match = endReg.exec(maskedSrc)) != null) {
+                 rDelim = match[1] || match[2] || match[3] || match[4] || match[5] || match[6];
+                 if (!rDelim) continue; // skip single * in __abc*abc__
 
-       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.
-        */
+                 rLength = rDelim.length;
 
+                 if (match[3] || match[4]) {
+                   // found another Left Delim
+                   delimTotal += rLength;
+                   continue;
+                 } else if (match[5] || match[6]) {
+                   // either Left or Right Delim
+                   if (lLength % 3 && !((lLength + rLength) % 3)) {
+                     midDelimTotal += rLength;
+                     continue; // CommonMark Emphasis Rules 9-10
+                   }
+                 }
+
+                 delimTotal -= rLength;
+                 if (delimTotal > 0) continue; // Haven't found enough closing delimiters
+                 // Remove extra characters. *a*** -> *a*
 
-       function loadTiles$2(which, url, projection, margin) {
-         var tiles = tiler$6.margin(margin).getTiles(projection); // abort inflight requests that are no longer needed
+                 rLength = Math.min(rLength, rLength + delimTotal + midDelimTotal); // Create `em` if smallest delimiter has odd char count. *a***
+
+                 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***
 
-         var cache = _ssCache[which];
-         Object.keys(cache.inflight).forEach(function (k) {
-           var wanted = tiles.find(function (tile) {
-             return k.indexOf(tile.id + ',') === 0;
-           });
 
-           if (!wanted) {
-             abortRequest$6(cache.inflight[k]);
-             delete cache.inflight[k];
+                 return {
+                   type: 'strong',
+                   raw: src.slice(0, lLength + match.index + rLength + 1),
+                   text: src.slice(2, lLength + match.index + rLength - 1)
+                 };
+               }
+             }
            }
-         });
-         tiles.forEach(function (tile) {
-           return loadNextTilePage$2(which, url, tile);
-         });
-       }
-       /**
-        * loadNextTilePage() load data for the next tile page in line.
-        */
+         }, {
+           key: "codespan",
+           value: function codespan(src) {
+             var cap = this.rules.inline.code.exec(src);
 
+             if (cap) {
+               var text = cap[2].replace(/\n/g, ' ');
+               var hasNonSpaceChars = /[^ ]/.test(text);
+               var hasSpaceCharsOnBothEnds = /^ /.test(text) && / $/.test(text);
 
-       function 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
+               if (hasNonSpaceChars && hasSpaceCharsOnBothEnds) {
+                 text = text.substring(1, text.length - 1);
+               }
 
-           bubbles.shift();
-           var features = bubbles.map(function (bubble) {
-             if (cache.points[bubble.id]) return null; // skip duplicates
+               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 loc = [bubble.lo, bubble.la];
-             var d = {
-               loc: loc,
-               key: bubble.id,
-               ca: bubble.he,
-               captured_at: bubble.cd,
-               captured_by: 'microsoft',
-               // nbn: bubble.nbn,
-               // pbn: bubble.pbn,
-               // ad: bubble.ad,
-               // rn: bubble.rn,
-               pr: bubble.pr,
-               // previous
-               ne: bubble.ne,
-               // next
-               pano: true,
-               sequenceKey: null
-             };
-             cache.points[bubble.id] = d; // a sequence starts here
+             if (cap) {
+               return {
+                 type: 'br',
+                 raw: cap[0]
+               };
+             }
+           }
+         }, {
+           key: "del",
+           value: function del(src) {
+             var cap = this.rules.inline.del.exec(src);
 
-             if (bubble.pr === undefined) {
-               cache.leaders.push(bubble.id);
+             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);
 
-             return {
-               minX: loc[0],
-               minY: loc[1],
-               maxX: loc[0],
-               maxY: loc[1],
-               data: d
-             };
-           }).filter(Boolean);
-           cache.rtree.load(features);
-           connectSequences();
+             if (cap) {
+               var text, href;
 
-           if (which === 'bubbles') {
-             dispatch$7.call('loadedImages');
+               if (cap[2] === '@') {
+                 text = _escape(this.options.mangle ? mangle(cap[1]) : cap[1]);
+                 href = 'mailto:' + text;
+               } else {
+                 text = _escape(cap[1]);
+                 href = text;
+               }
+
+               return {
+                 type: 'link',
+                 raw: cap[0],
+                 text: text,
+                 href: href,
+                 tokens: [{
+                   type: 'text',
+                   raw: text,
+                   text: text
+                 }]
+               };
+             }
            }
-         });
-       } // call this sometimes to connect the bubbles into sequences
+         }, {
+           key: "url",
+           value: function url(src, mangle) {
+             var cap;
 
+             if (cap = this.rules.inline.url.exec(src)) {
+               var text, href;
 
-       function connectSequences() {
-         var cache = _ssCache.bubbles;
-         var keepLeaders = [];
+               if (cap[2] === '@') {
+                 text = _escape(this.options.mangle ? mangle(cap[0]) : cap[0]);
+                 href = 'mailto:' + text;
+               } else {
+                 // do extended autolink path validation
+                 var prevCapZero;
 
-         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.
+                 do {
+                   prevCapZero = cap[0];
+                   cap[0] = this.rules.inline._backpedal.exec(cap[0])[0];
+                 } while (prevCapZero !== cap[0]);
 
-           var sequence = {
-             key: bubble.key,
-             bubbles: []
-           };
-           var complete = false;
+                 text = _escape(cap[0]);
 
-           do {
-             sequence.bubbles.push(bubble);
-             seen[bubble.key] = true;
+                 if (cap[1] === 'www.') {
+                   href = 'http://' + text;
+                 } else {
+                   href = text;
+                 }
+               }
 
-             if (bubble.ne === undefined) {
-               complete = true;
-             } else {
-               bubble = cache.points[bubble.ne]; // advance to next
+               return {
+                 type: 'link',
+                 raw: cap[0],
+                 text: text,
+                 href: href,
+                 tokens: [{
+                   type: 'text',
+                   raw: text,
+                   text: text
+                 }]
+               };
              }
-           } while (bubble && !seen[bubble.key] && !complete);
-
-           if (complete) {
-             _ssCache.sequences[sequence.key] = sequence; // assign bubbles to the sequence
+           }
+         }, {
+           key: "inlineText",
+           value: function inlineText(src, inRawBlock, smartypants) {
+             var cap = this.rules.inline.text.exec(src);
 
-             for (var j = 0; j < sequence.bubbles.length; j++) {
-               sequence.bubbles[j].sequenceKey = sequence.key;
-             } // create a GeoJSON LineString
+             if (cap) {
+               var text;
 
+               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]);
+               }
 
-             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]);
+               return {
+                 type: 'text',
+                 raw: cap[0],
+                 text: text
+               };
+             }
            }
-         } // couldn't complete these, save for later
+         }]);
 
+         return Tokenizer;
+       }();
 
-         cache.leaders = keepLeaders;
-       }
+       var noopTest = helpers.noopTest,
+           edit = helpers.edit,
+           merge$1 = helpers.merge;
        /**
-        * getBubbles() handles the request to the server for a tile extent of 'bubbles' (streetside image locations).
+        * Block-Level Grammar
         */
 
+       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
+        */
 
-       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
+       block$1.normal = merge$1({}, block$1);
+       /**
+        * GFM Block Grammar
+        */
 
+       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
 
-       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
+       });
+       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 tiler = utilTiler().zoomExtent([z2, z2]);
-         return tiler.getTiles(projection).map(function (tile) {
-           return tile.extent;
-         });
-       } // no more than `limit` results per partition.
+       block$1.pedantic = merge$1({}, block$1.normal, {
+         html: edit('^ *(?:comment *(?:\\n|\\s*$)' + '|<(tag)[\\s\\S]+?</\\1> *(?:\\n{2,}|\\s*$)' // closed tag
+         + '|<tag(?:"[^"]*"|\'[^\']*\'|\\s[^\'"/>\\s]*)*?/?> *(?:\\n{2,}|\\s*$))').replace('comment', block$1._comment).replace(/tag/g, '(?!(?:' + 'a|em|strong|small|s|cite|q|dfn|abbr|data|time|code|var|samp|kbd|sub' + '|sup|i|b|u|mark|ruby|rt|rp|bdi|bdo|span|br|wbr|ins|del|img)' + '\\b)\\w+(?!:|[^\\w\\s@]*@)\\b').getRegex(),
+         def: /^ *\[([^\]]+)\]: *<?([^\s>]+)>?(?: +(["(][^\n]+[")]))? *(?:\n+|$)/,
+         heading: /^(#{1,6})(.*)(?:\n+|$)/,
+         fences: noopTest,
+         // fences not supported
+         paragraph: edit(block$1.normal._paragraph).replace('hr', block$1.hr).replace('heading', ' *#{1,6} *[^\n]').replace('lheading', block$1.lheading).replace('blockquote', ' {0,3}>').replace('|fences', '').replace('|list', '').replace('|html', '').getRegex()
+       });
+       /**
+        * Inline-Level Grammar
+        */
 
+       var 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 _
 
-       function searchLimited$2(limit, projection, rtree) {
-         limit = limit || 5;
-         return partitionViewport$2(projection).reduce(function (result, extent) {
-           var found = rtree.search(extent.bbox()).slice(0, limit).map(function (d) {
-             return d.data;
-           });
-           return found.length ? result.concat(found) : result;
-         }, []);
-       }
+         },
+         code: /^(`+)([^`]|[^`][\s\S]*?[^`])\1(?!`)/,
+         br: /^( {2,}|\\)\n(?!\s*$)/,
+         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();
        /**
-        * loadImage()
+        * Normal Inline Grammar
         */
 
+       inline$1.normal = merge$1({}, inline$1);
+       /**
+        * Pedantic Inline Grammar
+        */
 
-       function loadImage(imgInfo) {
-         return new Promise(function (resolve) {
-           var img = new Image();
+       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
+        */
 
-           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'
-             });
-           };
+       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
+        */
 
-           img.onerror = function () {
-             resolve({
-               data: imgInfo,
-               status: 'error'
-             });
-           };
+       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
+       };
 
-           img.setAttribute('crossorigin', '');
-           img.src = imgInfo.url;
-         });
+       var defaults$3 = defaults$5.defaults;
+       var block = rules.block,
+           inline = rules.inline;
+       var repeatString = helpers.repeatString;
+       /**
+        * smartypants text replacement
+        */
+
+       function smartypants(text) {
+         return text // em-dashes
+         .replace(/---/g, "\u2014") // en-dashes
+         .replace(/--/g, "\u2013") // opening singles
+         .replace(/(^|[-\u2014/(\[{"\s])'/g, "$1\u2018") // closing singles & apostrophes
+         .replace(/'/g, "\u2019") // opening doubles
+         .replace(/(^|[-\u2014/(\[{\u2018\s])"/g, "$1\u201C") // closing doubles
+         .replace(/"/g, "\u201D") // ellipses
+         .replace(/\.{3}/g, "\u2026");
        }
        /**
-        * loadCanvas()
+        * mangle email addresses
         */
 
 
-       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'
-           };
-         });
+       function mangle(text) {
+         var out = '',
+             i,
+             ch;
+         var l = text.length;
+
+         for (i = 0; i < l; i++) {
+           ch = text.charCodeAt(i);
+
+           if (Math.random() > 0.5) {
+             ch = 'x' + ch.toString(16);
+           }
+
+           out += '&#' + ch + ';';
+         }
+
+         return out;
        }
        /**
-        * loadFaces()
+        * Block Lexer
         */
 
 
-       function loadFaces(faceGroup) {
-         return Promise.all(faceGroup.map(loadCanvas)).then(function () {
-           return {
-             status: 'loadFaces done'
+       var Lexer_1 = /*#__PURE__*/function () {
+         function Lexer(options) {
+           _classCallCheck$1(this, Lexer);
+
+           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
            };
-         });
-       }
 
-       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 (this.options.pedantic) {
+             rules.block = block.pedantic;
+             rules.inline = inline.pedantic;
+           } else if (this.options.gfm) {
+             rules.block = block.gfm;
+
+             if (this.options.breaks) {
+               rules.inline = inline.breaks;
+             } else {
+               rules.inline = inline.gfm;
+             }
+           }
 
+           this.tokenizer.rules = rules;
+         }
+         /**
+          * Expose Rules
+          */
 
-         selection.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;
+         _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
+            */
 
-         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;
-         }
+         }, {
+           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;
 
-         return [x, y];
-       }
+             if (this.options.pedantic) {
+               src = src.replace(/^ +$/gm, '');
+             }
 
-       function getQuadKeys() {
-         var dim = _resolution / 256;
-         var quadKeys;
+             var token, i, l, lastToken;
 
-         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'];
-         }
+             while (src) {
+               // newline
+               if (token = this.tokenizer.space(src)) {
+                 src = src.substring(token.raw.length);
+
+                 if (token.type) {
+                   tokens.push(token);
+                 }
 
-         return quadKeys;
-       }
+                 continue;
+               } // code
 
-       var serviceStreetside = {
-         /**
-          * init() initialize streetside.
-          */
-         init: function init() {
-           if (!_ssCache) {
-             this.reset();
-           }
 
-           this.event = utilRebind(this, dispatch$7, 'on');
-         },
+               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.
 
-         /**
-          * reset() reset the cache.
-          */
-         reset: function reset() {
-           if (_ssCache) {
-             Object.values(_ssCache.bubbles.inflight).forEach(abortRequest$6);
-           }
+                 if (lastToken && lastToken.type === 'paragraph') {
+                   lastToken.raw += '\n' + token.raw;
+                   lastToken.text += '\n' + token.text;
+                 } else {
+                   tokens.push(token);
+                 }
 
-           _ssCache = {
-             bubbles: {
-               inflight: {},
-               loaded: {},
-               nextPage: {},
-               rtree: new RBush(),
-               points: {},
-               leaders: []
-             },
-             sequences: {}
-           };
-         },
+                 continue;
+               } // fences
 
-         /**
-          * 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
 
-           _ssCache.bubbles.rtree.search(bbox).forEach(function (d) {
-             var key = d.data.sequenceKey;
+               if (token = this.tokenizer.fences(src)) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // heading
 
-             if (key && !seen[key]) {
-               seen[key] = true;
-               results.push(_ssCache.sequences[key].geojson);
-             }
-           });
 
-           return results;
-         },
+               if (token = this.tokenizer.heading(src)) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // table no leading pipe (gfm)
 
-         /**
-          * 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;
 
-           var sceneID = _currScene.toString();
+               if (token = this.tokenizer.nptable(src)) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // hr
 
-           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
 
-           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 (token = this.tokenizer.hr(src)) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // blockquote
 
-           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$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.
+               if (token = this.tokenizer.blockquote(src)) {
+                 src = src.substring(token.raw.length);
+                 token.tokens = this.blockTokens(token.text, [], top);
+                 tokens.push(token);
+                 continue;
+               } // list
 
-             var t = timer(function (elapsed) {
-               dispatch$7.call('viewerChanged');
 
-               if (elapsed > 2000) {
-                 t.stop();
-               }
-             });
-           }).append('div').attr('class', 'photo-attribution fillD');
-           var controlsEnter = wrapEnter.append('div').attr('class', 'photo-controls-wrap').append('div').attr('class', 'photo-controls');
-           controlsEnter.append('button').on('click.back', step(-1)).html('◄');
-           controlsEnter.append('button').on('click.forward', step(1)).html('►'); // create working canvas for stitching together images
+               if (token = this.tokenizer.list(src)) {
+                 src = src.substring(token.raw.length);
+                 l = token.items.length;
 
-           wrap = wrap.merge(wrapEnter).call(setupCanvas, true); // Register viewer resize handler
+                 for (i = 0; i < l; i++) {
+                   token.items[i].tokens = this.blockTokens(token.items[i].text, [], false);
+                 }
 
-           context.ui().photoviewer.on('resize.streetside', function () {
-             if (_pannellumViewer) {
-               _pannellumViewer.resize();
-             }
-           });
-           _loadViewerPromise$2 = new Promise(function (resolve, reject) {
-             var loadedCount = 0;
+                 tokens.push(token);
+                 continue;
+               } // html
 
-             function loaded() {
-               loadedCount += 1; // wait until both files are loaded
 
-               if (loadedCount === 2) resolve();
-             }
+               if (token = this.tokenizer.html(src)) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // def
 
-             var head = select('head'); // load streetside pannellum viewer css
 
-             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
+               if (top && (token = this.tokenizer.def(src))) {
+                 src = src.substring(token.raw.length);
 
-             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;
+                 if (!this.tokens.links[token.tag]) {
+                   this.tokens.links[token.tag] = {
+                     href: token.href,
+                     title: token.title
+                   };
+                 }
 
-           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;
+                 continue;
+               } // table (gfm)
 
-               var yaw = _pannellumViewer.getYaw();
 
-               var ca = selected.ca + yaw;
-               var origin = selected.loc; // construct a search trapezoid pointing out from current bubble
+               if (token = this.tokenizer.table(src)) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // lheading
 
-               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 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
+               if (token = this.tokenizer.lheading(src)) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // top-level paragraph
 
-               var minDist = Infinity;
 
-               _ssCache.bubbles.rtree.search(extent.bbox()).forEach(function (d) {
-                 if (d.data.key === selected.key) return;
-                 if (!geoPointInPolygon(d.data.loc, poly)) return;
-                 var dist = geoVecLength(d.data.loc, selected.loc);
-                 var theta = selected.ca - d.data.ca;
-                 var minTheta = Math.min(Math.abs(theta), 360 - Math.abs(theta));
+               if (top && (token = this.tokenizer.paragraph(src))) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // text
 
-                 if (minTheta > 20) {
-                   dist += 5; // penalize distance if camera angles don't match
+
+               if (token = this.tokenizer.text(src)) {
+                 src = src.substring(token.raw.length);
+                 lastToken = tokens[tokens.length - 1];
+
+                 if (lastToken && lastToken.type === 'text') {
+                   lastToken.raw += '\n' + token.raw;
+                   lastToken.text += '\n' + token.text;
+                 } else {
+                   tokens.push(token);
                  }
 
-                 if (dist < minDist) {
-                   nextID = d.data.key;
-                   minDist = dist;
+                 continue;
+               }
+
+               if (src) {
+                 var errMsg = 'Infinite loop on byte: ' + src.charCodeAt(0);
+
+                 if (this.options.silent) {
+                   console.error(errMsg);
+                   break;
+                 } else {
+                   throw new Error(errMsg);
                  }
-               });
+               }
+             }
 
-               var nextBubble = nextID && that.cachedImage(nextID);
-               if (!nextBubble) return;
-               context.map().centerEase(nextBubble.loc);
-               that.selectImage(context, nextBubble.key).yaw(yaw).showViewer(context);
-             };
+             return tokens;
            }
-         },
-         yaw: function yaw(_yaw) {
-           if (typeof _yaw !== 'number') return _yaw;
-           _sceneOptions.yaw = _yaw;
-           return this;
-         },
+         }, {
+           key: "inline",
+           value: function inline(tokens) {
+             var i, j, k, l2, row, token;
+             var l = tokens.length;
 
-         /**
-          * showViewer()
-          */
-         showViewer: function showViewer(context) {
-           var wrap = context.container().select('.photoviewer').classed('hide', false);
-           var isHidden = wrap.selectAll('.photo-wrapper.ms-wrapper.hide').size();
+             for (i = 0; i < l; i++) {
+               token = tokens[i];
 
-           if (isHidden) {
-             wrap.selectAll('.photo-wrapper:not(.ms-wrapper)').classed('hide', true);
-             wrap.selectAll('.photo-wrapper.ms-wrapper').classed('hide', false);
-           }
+               switch (token.type) {
+                 case 'paragraph':
+                 case 'text':
+                 case 'heading':
+                   {
+                     token.tokens = [];
+                     this.inlineTokens(token.text, token.tokens);
+                     break;
+                   }
 
-           return this;
-         },
+                 case 'table':
+                   {
+                     token.tokens = {
+                       header: [],
+                       cells: []
+                     }; // header
 
-         /**
-          * 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);
-         },
+                     l2 = token.header.length;
 
-         /**
-          * 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
+                     for (j = 0; j < l2; j++) {
+                       token.tokens.header[j] = [];
+                       this.inlineTokens(token.header[j], token.tokens.header[j]);
+                     } // cells
 
-           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 (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('|');
-           }
+                     l2 = token.cells.length;
 
-           if (d.captured_at) {
-             captureInfo.append('span').attr('class', 'captured_at').html(localeTimestamp(d.captured_at));
-           } // Add image links
+                     for (j = 0; j < l2; j++) {
+                       row = token.cells[j];
+                       token.tokens.cells[j] = [];
 
+                       for (k = 0; k < row.length; k++) {
+                         token.tokens.cells[j][k] = [];
+                         this.inlineTokens(row[k], token.tokens.cells[j][k]);
+                       }
+                     }
 
-           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;
+                     break;
+                   }
 
-           for (var i = 0; i < paddingNeeded; i++) {
-             bubbleIdQuadKey = '0' + bubbleIdQuadKey;
-           }
+                 case 'blockquote':
+                   {
+                     this.inline(token.tokens);
+                     break;
+                   }
 
-           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
+                 case 'list':
+                   {
+                     l2 = token.items.length;
 
-           var faceKeys = ['01', '02', '03', '10', '11', '12']; // Map images to cube faces
+                     for (j = 0; j < l2; j++) {
+                       this.inline(token.items[j].tokens);
+                     }
 
-           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;
+                     break;
+                   }
+               }
+             }
 
-               var sceneID = _currScene.toString();
+             return tokens;
+           }
+           /**
+            * Lexing/Compiling
+            */
 
-               _pannellumViewer.addScene(sceneID, _sceneOptions).loadScene(sceneID); // remove previous scene
+         }, {
+           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 (_currScene > 2) {
-                 sceneID = (_currScene - 1).toString();
+             if (this.tokens.links) {
+               var links = Object.keys(this.tokens.links);
 
-                 _pannellumViewer.removeScene(sceneID);
+               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
+
+
+             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
+
+
+             while ((match = this.tokenizer.rules.inline.escapedEmSt.exec(maskedSrc)) != null) {
+               maskedSrc = maskedSrc.slice(0, match.index) + '++' + maskedSrc.slice(this.tokenizer.rules.inline.escapedEmSt.lastIndex);
              }
-           });
-           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 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
+             while (src) {
+               if (!keepPrevChar) {
+                 prevChar = '';
+               }
 
-           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
+               keepPrevChar = false; // escape
 
-           context.container().selectAll('.viewfield-group .viewfield').attr('d', viewfieldPath);
+               if (token = this.tokenizer.escape(src)) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // tag
 
-           function viewfieldPath() {
-             var d = this.parentNode.__data__;
 
-             if (d.pano && d.key !== selectedBubbleKey) {
-               return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
-             } else {
-               return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
-             }
-           }
+               if (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];
 
-           return this;
-         },
-         updateUrlImage: function updateUrlImage(imageKey) {
-           if (!window.mocha) {
-             var hash = utilStringQs(window.location.hash);
+                 if (_lastToken && token.type === 'text' && _lastToken.type === 'text') {
+                   _lastToken.raw += token.raw;
+                   _lastToken.text += token.text;
+                 } else {
+                   tokens.push(token);
+                 }
+
+                 continue;
+               } // link
 
-             if (imageKey) {
-               hash.photo = 'streetside/' + imageKey;
-             } else {
-               delete hash.photo;
-             }
 
-             window.location.replace('#' + utilQsString(hash, true));
-           }
-         },
+               if (token = this.tokenizer.link(src)) {
+                 src = src.substring(token.raw.length);
 
-         /**
-          * cache().
-          */
-         cache: function cache() {
-           return _ssCache;
-         }
-       };
+                 if (token.type === 'link') {
+                   token.tokens = this.inlineTokens(token.text, [], true, inRawBlock);
+                 }
 
-       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'
-       };
+                 tokens.push(token);
+                 continue;
+               } // reflink, nolink
 
-       function sets(params, n, o) {
-         if (params.geometry && o[params.geometry]) {
-           params[n] = o[params.geometry];
-         }
 
-         return params;
-       }
+               if (token = this.tokenizer.reflink(src, this.tokens.links)) {
+                 src = src.substring(token.raw.length);
+                 var _lastToken2 = tokens[tokens.length - 1];
 
-       function setFilter(params) {
-         return sets(params, 'filter', tag_filters);
-       }
+                 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);
+                 }
 
-       function setSort(params) {
-         return sets(params, 'sortname', tag_sorts);
-       }
+                 continue;
+               } // em & strong
 
-       function setSortMembers(params) {
-         return sets(params, 'sortname', tag_sort_members);
-       }
 
-       function clean(params) {
-         return utilObjectOmit(params, ['geometry', 'debounce']);
-       }
+               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
 
-       function filterKeys(type) {
-         var count_type = type ? 'count_' + type : 'count_all';
-         return function (d) {
-           return parseFloat(d[count_type]) > 2500 || d.in_wiki;
-         };
-       }
 
-       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;
-         };
-       }
+               if (token = this.tokenizer.codespan(src)) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // br
 
-       function filterValues(allowUpperCase) {
-         return function (d) {
-           if (d.value.match(/[;,]/) !== null) return false; // exclude some punctuation
 
-           if (!allowUpperCase && d.value.match(/[A-Z*]/) !== null) return false; // exclude uppercase letters
+               if (token = this.tokenizer.br(src)) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // del (gfm)
 
-           return parseFloat(d.fraction) > 0.0;
-         };
-       }
 
-       function filterRoles(geometry) {
-         return function (d) {
-           if (d.role === '') return false; // exclude empty role
+               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
 
-           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 (token = this.tokenizer.autolink(src, mangle)) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // url (gfm)
 
-       function valKey(d) {
-         return {
-           value: d.key,
-           title: d.key
-         };
-       }
 
-       function valKeyDescription(d) {
-         var obj = {
-           value: d.value,
-           title: d.description || d.value
-         };
+               if (!inLink && (token = this.tokenizer.url(src, mangle))) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // text
 
-         if (d.count) {
-           obj.count = d.count;
-         }
 
-         return obj;
-       }
+               if (token = this.tokenizer.inlineText(src, inRawBlock, smartypants)) {
+                 src = src.substring(token.raw.length);
 
-       function roleKey(d) {
-         return {
-           value: d.role,
-           title: d.role
-         };
-       } // sort keys with ':' lower than keys without ':'
+                 if (token.raw.slice(-1) !== '_') {
+                   // Track prevChar before string of ____ started
+                   prevChar = token.raw.slice(-1);
+                 }
 
+                 keepPrevChar = true;
+                 lastToken = tokens[tokens.length - 1];
 
-       function sortKeys(a, b) {
-         return a.key.indexOf(':') === -1 && b.key.indexOf(':') !== -1 ? -1 : a.key.indexOf(':') !== -1 && b.key.indexOf(':') === -1 ? 1 : 0;
-       }
+                 if (lastToken && lastToken.type === 'text') {
+                   lastToken.raw += token.raw;
+                   lastToken.text += token.text;
+                 } else {
+                   tokens.push(token);
+                 }
 
-       var debouncedRequest$1 = debounce(request$1, 300, {
-         leading: false
-       });
+                 continue;
+               }
 
-       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);
-         });
-       }
+               if (src) {
+                 var errMsg = 'Infinite loop on byte: ' + src.charCodeAt(0);
 
-       function checkCache(url, params, exactMatch, callback) {
-         var rp = params.rp || 25;
-         var testQuery = params.query || '';
-         var testUrl = url;
+                 if (this.options.silent) {
+                   console.error(errMsg);
+                   break;
+                 } else {
+                   throw new Error(errMsg);
+                 }
+               }
+             }
 
-         do {
-           var hit = _taginfoCache[testUrl]; // exact match, or shorter match yielding fewer than max results (rp)
+             return tokens;
+           }
+         }], [{
+           key: "rules",
+           get: function get() {
+             return {
+               block: block,
+               inline: inline
+             };
+           }
+           /**
+            * Static Lex Method
+            */
 
-           if (hit && (url === testUrl || hit.length < rp)) {
-             callback(null, hit);
-             return true;
-           } // don't try to shorten the query
+         }, {
+           key: "lex",
+           value: function lex(src, options) {
+             var lexer = new Lexer(options);
+             return lexer.lex(src);
+           }
+           /**
+            * Static Lex Inline Method
+            */
 
+         }, {
+           key: "lexInline",
+           value: function lexInline(src, options) {
+             var lexer = new Lexer(options);
+             return lexer.inlineTokens(src);
+           }
+         }]);
 
-           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)
+         return Lexer;
+       }();
 
-           testQuery = testQuery.slice(0, -1);
-           testUrl = url.replace(/&query=(.*?)&/, '&query=' + testQuery + '&');
-         } while (testQuery.length >= 0);
+       var defaults$2 = defaults$5.defaults;
+       var cleanUrl = helpers.cleanUrl,
+           escape$2 = helpers.escape;
+       /**
+        * Renderer
+        */
 
-         return false;
-       }
+       var Renderer_1 = /*#__PURE__*/function () {
+         function Renderer(options) {
+           _classCallCheck$1(this, Renderer);
 
-       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
+           this.options = options || defaults$2;
+         }
 
-           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
+         _createClass$1(Renderer, [{
+           key: "code",
+           value: function code(_code, infostring, escaped) {
+             var lang = (infostring || '').match(/\S*/)[0];
 
-               _popularKeys[d.value] = true;
-             });
-           });
-         },
-         reset: function reset() {
-           Object.values(_inflight$2).forEach(function (controller) {
-             controller.abort();
-           });
-           _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);
+             if (this.options.highlight) {
+               var out = this.options.highlight(_code, lang);
+
+               if (out != null && out !== _code) {
+                 escaped = true;
+                 _code = out;
+               }
              }
-           });
-         },
-         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$1 + 'keys/all?' + utilQsString(params);
-           doRequest(url, params, true, callback, function (err, d) {
-             if (err) {
-               callback(err);
-             } else {
-               var f = filterMultikeys(prefix);
-               var result = d.data.filter(f).map(valKey);
-               _taginfoCache[url] = result;
-               callback(null, result);
+
+             _code = _code.replace(/\n$/, '') + '\n';
+
+             if (!lang) {
+               return '<pre><code>' + (escaped ? _code : escape$2(_code, true)) + '</code></pre>\n';
              }
-           });
-         },
-         values: function values(params, callback) {
-           // Exclude popular keys from values lookups.. see #3955
-           var key = params.key;
 
-           if (key && _popularKeys[key]) {
-             callback(null, []);
-             return;
+             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
 
-           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);
-             }
-           });
-         },
-         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);
-             }
-           });
-         },
-         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?';
+             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 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);
+         }, {
+           key: "strong",
+           value: function strong(text) {
+             return '<strong>' + text + '</strong>';
+           }
+         }, {
+           key: "em",
+           value: function em(text) {
+             return '<em>' + text + '</em>';
+           }
+         }, {
+           key: "codespan",
+           value: function codespan(text) {
+             return '<code>' + text + '</code>';
+           }
+         }, {
+           key: "br",
+           value: function br() {
+             return this.options.xhtml ? '<br/>' : '<br>';
+           }
+         }, {
+           key: "del",
+           value: function del(text) {
+             return '<del>' + text + '</del>';
+           }
+         }, {
+           key: "link",
+           value: function link(href, title, text) {
+             href = cleanUrl(this.options.sanitize, this.options.baseUrl, href);
+
+             if (href === null) {
+               return text;
+             }
+
+             var out = '<a href="' + escape$2(href) + '"';
+
+             if (title) {
+               out += ' title="' + title + '"';
              }
-           });
-         },
-         apibase: function apibase(_) {
-           if (!arguments.length) return _apibase$1;
-           _apibase$1 = _;
-           return this;
-         }
-       };
 
-       var helpers$1 = createCommonjsModule(function (module, exports) {
+             out += '>' + text + '</a>';
+             return out;
+           }
+         }, {
+           key: "image",
+           value: function image(href, title, text) {
+             href = cleanUrl(this.options.sanitize, this.options.baseUrl, href);
 
-         Object.defineProperty(exports, "__esModule", {
-           value: true
-         });
-         /**
-          * @module helpers
-          */
+             if (href === null) {
+               return text;
+             }
 
-         /**
-          * Earth Radius used with the Harvesine formula and approximates using a spherical (non-ellipsoid) Earth.
-          *
-          * @memberof helpers
-          * @type {number}
-          */
+             var out = '<img src="' + href + '" alt="' + text + '"';
 
-         exports.earthRadius = 6371008.8;
-         /**
-          * Unit of measurement factors using a spherical (non-ellipsoid) earth radius.
-          *
-          * @memberof helpers
-          * @type {Object}
-          */
+             if (title) {
+               out += ' title="' + title + '"';
+             }
 
-         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}
-          */
+             out += this.options.xhtml ? '/>' : '>';
+             return out;
+           }
+         }, {
+           key: "text",
+           value: function text(_text) {
+             return _text;
+           }
+         }]);
 
-         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}
-          */
+         return Renderer;
+       }();
 
-         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
-          */
+       /**
+        * TextRenderer
+        * returns only the textual part of the token
+        */
+       var TextRenderer_1 = /*#__PURE__*/function () {
+         function TextRenderer() {
+           _classCallCheck$1(this, TextRenderer);
+         }
 
-         function feature(geom, properties, options) {
-           if (options === void 0) {
-             options = {};
+         _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 feat = {
-             type: "Feature"
-           };
+         return TextRenderer;
+       }();
 
-           if (options.id === 0 || options.id) {
-             feat.id = options.id;
-           }
+       /**
+        * Slugger generates header id
+        */
+       var Slugger_1 = /*#__PURE__*/function () {
+         function Slugger() {
+           _classCallCheck$1(this, Slugger);
+
+           this.seen = {};
+         }
 
-           if (options.bbox) {
-             feat.bbox = options.bbox;
+         _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
+            */
 
-           feat.properties = properties || {};
-           feat.geometry = geom;
-           return feat;
-         }
+         }, {
+           key: "getNextSafeSlug",
+           value: function getNextSafeSlug(originalSlug, isDryRun) {
+             var slug = originalSlug;
+             var occurenceAccumulator = 0;
 
-         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
-          */
+             if (this.seen.hasOwnProperty(slug)) {
+               occurenceAccumulator = this.seen[originalSlug];
 
-         function geometry(type, coordinates, options) {
+               do {
+                 occurenceAccumulator++;
+                 slug = originalSlug + '-' + occurenceAccumulator;
+               } while (this.seen.hasOwnProperty(slug));
+             }
 
-           switch (type) {
-             case "Point":
-               return point(coordinates).geometry;
+             if (!isDryRun) {
+               this.seen[originalSlug] = occurenceAccumulator;
+               this.seen[slug] = 0;
+             }
 
-             case "LineString":
-               return lineString(coordinates).geometry;
+             return slug;
+           }
+           /**
+            * Convert string to unique id
+            * @param {object} options
+            * @param {boolean} options.dryrun Generates the next unique slug without updating the internal accumulator.
+            */
 
-             case "Polygon":
-               return polygon(coordinates).geometry;
+         }, {
+           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);
+           }
+         }]);
 
-             case "MultiPoint":
-               return multiPoint(coordinates).geometry;
+         return Slugger;
+       }();
 
-             case "MultiLineString":
-               return multiLineString(coordinates).geometry;
+       var defaults$1 = defaults$5.defaults;
+       var unescape$1 = helpers.unescape;
+       /**
+        * Parsing & Compiling
+        */
 
-             case "MultiPolygon":
-               return multiPolygon(coordinates).geometry;
+       var Parser_1 = /*#__PURE__*/function () {
+         function Parser(options) {
+           _classCallCheck$1(this, Parser);
 
-             default:
-               throw new Error(type + " is invalid");
-           }
+           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();
          }
-
-         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
+          * Static Parse Method
           */
 
-         function point(coordinates, properties, options) {
-           if (options === void 0) {
-             options = {};
-           }
 
-           var geom = {
-             type: "Point",
-             coordinates: coordinates
-           };
-           return feature(geom, properties, options);
-         }
+         _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;
 
-         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 (i = 0; i < l; i++) {
+               token = tokens[i];
 
-         function points(coordinates, properties, options) {
-           if (options === void 0) {
-             options = {};
-           }
+               switch (token.type) {
+                 case 'space':
+                   {
+                     continue;
+                   }
 
-           return featureCollection(coordinates.map(function (coords) {
-             return point(coords, properties);
-           }), options);
-         }
+                 case 'hr':
+                   {
+                     out += this.renderer.hr();
+                     continue;
+                   }
 
-         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
-          */
+                 case 'heading':
+                   {
+                     out += this.renderer.heading(this.parseInline(token.tokens), token.depth, unescape$1(this.parseInline(token.tokens, this.textRenderer)), this.slugger);
+                     continue;
+                   }
 
-         function polygon(coordinates, properties, options) {
-           if (options === void 0) {
-             options = {};
-           }
+                 case 'code':
+                   {
+                     out += this.renderer.code(token.text, token.lang, token.escaped);
+                     continue;
+                   }
 
-           for (var _i = 0, coordinates_1 = coordinates; _i < coordinates_1.length; _i++) {
-             var ring = coordinates_1[_i];
+                 case 'table':
+                   {
+                     header = ''; // header
 
-             if (ring.length < 4) {
-               throw new Error("Each LinearRing of a Polygon must have 4 or more Positions.");
-             }
+                     cell = '';
+                     l2 = token.header.length;
 
-             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.");
-               }
-             }
-           }
+                     for (j = 0; j < l2; j++) {
+                       cell += this.renderer.tablecell(this.parseInline(token.tokens.header[j]), {
+                         header: true,
+                         align: token.align[j]
+                       });
+                     }
 
-           var geom = {
-             type: "Polygon",
-             coordinates: coordinates
-           };
-           return feature(geom, properties, options);
-         }
+                     header += this.renderer.tablerow(cell);
+                     body = '';
+                     l2 = token.cells.length;
 
-         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
-          */
+                     for (j = 0; j < l2; j++) {
+                       row = token.tokens.cells[j];
+                       cell = '';
+                       l3 = row.length;
 
-         function polygons(coordinates, properties, options) {
-           if (options === void 0) {
-             options = {};
-           }
+                       for (k = 0; k < l3; k++) {
+                         cell += this.renderer.tablecell(this.parseInline(row[k]), {
+                           header: false,
+                           align: token.align[k]
+                         });
+                       }
 
-           return featureCollection(coordinates.map(function (coords) {
-             return polygon(coords, properties);
-           }), options);
-         }
+                       body += this.renderer.tablerow(cell);
+                     }
 
-         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
-          */
+                     out += this.renderer.table(header, body);
+                     continue;
+                   }
 
-         function lineString(coordinates, properties, options) {
-           if (options === void 0) {
-             options = {};
-           }
+                 case 'blockquote':
+                   {
+                     body = this.parse(token.tokens);
+                     out += this.renderer.blockquote(body);
+                     continue;
+                   }
 
-           if (coordinates.length < 2) {
-             throw new Error("coordinates must be an array of two or more positions");
-           }
+                 case 'list':
+                   {
+                     ordered = token.ordered;
+                     start = token.start;
+                     loose = token.loose;
+                     l2 = token.items.length;
+                     body = '';
 
-           var geom = {
-             type: "LineString",
-             coordinates: coordinates
-           };
-           return feature(geom, properties, options);
-         }
+                     for (j = 0; j < l2; j++) {
+                       item = token.items[j];
+                       checked = item.checked;
+                       task = item.task;
+                       itemBody = '';
 
-         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
-          */
+                       if (item.task) {
+                         checkbox = this.renderer.checkbox(checked);
 
-         function lineStrings(coordinates, properties, options) {
-           if (options === void 0) {
-             options = {};
-           }
+                         if (loose) {
+                           if (item.tokens.length > 0 && item.tokens[0].type === 'text') {
+                             item.tokens[0].text = checkbox + ' ' + item.tokens[0].text;
 
-           return featureCollection(coordinates.map(function (coords) {
-             return lineString(coords, properties);
-           }), options);
-         }
+                             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;
+                         }
+                       }
 
-         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
-          */
+                       itemBody += this.parse(item.tokens, loose);
+                       body += this.renderer.listitem(itemBody, task, checked);
+                     }
 
-         function featureCollection(features, options) {
-           if (options === void 0) {
-             options = {};
-           }
+                     out += this.renderer.list(body, ordered, start);
+                     continue;
+                   }
 
-           var fc = {
-             type: "FeatureCollection"
-           };
+                 case 'html':
+                   {
+                     // TODO parse inline content if parameter markdown=1
+                     out += this.renderer.html(token.text);
+                     continue;
+                   }
 
-           if (options.id) {
-             fc.id = options.id;
-           }
+                 case 'paragraph':
+                   {
+                     out += this.renderer.paragraph(this.parseInline(token.tokens));
+                     continue;
+                   }
 
-           if (options.bbox) {
-             fc.bbox = options.bbox;
-           }
+                 case 'text':
+                   {
+                     body = token.tokens ? this.parseInline(token.tokens) : token.text;
 
-           fc.features = features;
-           return fc;
-         }
+                     while (i + 1 < l && tokens[i + 1].type === 'text') {
+                       token = tokens[++i];
+                       body += '\n' + (token.tokens ? this.parseInline(token.tokens) : token.text);
+                     }
 
-         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
-          */
+                     out += top ? this.renderer.paragraph(body) : body;
+                     continue;
+                   }
+
+                 default:
+                   {
+                     var errMsg = 'Token with "' + token.type + '" type was not found.';
+
+                     if (this.options.silent) {
+                       console.error(errMsg);
+                       return;
+                     } else {
+                       throw new Error(errMsg);
+                     }
+                   }
+               }
+             }
 
-         function multiLineString(coordinates, properties, options) {
-           if (options === void 0) {
-             options = {};
+             return out;
            }
+           /**
+            * Parse Inline Tokens
+            */
 
-           var geom = {
-             type: "MultiLineString",
-             coordinates: coordinates
-           };
-           return feature(geom, properties, options);
-         }
+         }, {
+           key: "parseInline",
+           value: function parseInline(tokens, renderer) {
+             renderer = renderer || this.renderer;
+             var out = '',
+                 i,
+                 token;
+             var l = tokens.length;
 
-         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
-          */
+             for (i = 0; i < l; i++) {
+               token = tokens[i];
 
-         function multiPoint(coordinates, properties, options) {
-           if (options === void 0) {
-             options = {};
-           }
+               switch (token.type) {
+                 case 'escape':
+                   {
+                     out += renderer.text(token.text);
+                     break;
+                   }
 
-           var geom = {
-             type: "MultiPoint",
-             coordinates: coordinates
-           };
-           return feature(geom, properties, options);
-         }
+                 case 'html':
+                   {
+                     out += renderer.html(token.text);
+                     break;
+                   }
 
-         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
-          *
-          */
+                 case 'link':
+                   {
+                     out += renderer.link(token.href, token.title, this.parseInline(token.tokens, renderer));
+                     break;
+                   }
 
-         function multiPolygon(coordinates, properties, options) {
-           if (options === void 0) {
-             options = {};
-           }
+                 case 'image':
+                   {
+                     out += renderer.image(token.href, token.title, token.text);
+                     break;
+                   }
 
-           var geom = {
-             type: "MultiPolygon",
-             coordinates: coordinates
-           };
-           return feature(geom, properties, options);
-         }
+                 case 'strong':
+                   {
+                     out += renderer.strong(this.parseInline(token.tokens, renderer));
+                     break;
+                   }
 
-         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
-          */
+                 case 'em':
+                   {
+                     out += renderer.em(this.parseInline(token.tokens, renderer));
+                     break;
+                   }
 
-         function geometryCollection(geometries, properties, options) {
-           if (options === void 0) {
-             options = {};
-           }
+                 case 'codespan':
+                   {
+                     out += renderer.codespan(token.text);
+                     break;
+                   }
 
-           var geom = {
-             type: "GeometryCollection",
-             geometries: geometries
-           };
-           return feature(geom, properties, options);
-         }
+                 case 'br':
+                   {
+                     out += renderer.br();
+                     break;
+                   }
 
-         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
-          */
+                 case 'del':
+                   {
+                     out += renderer.del(this.parseInline(token.tokens, renderer));
+                     break;
+                   }
+
+                 case 'text':
+                   {
+                     out += renderer.text(token.text);
+                     break;
+                   }
+
+                 default:
+                   {
+                     var errMsg = 'Token with "' + token.type + '" type was not found.';
+
+                     if (this.options.silent) {
+                       console.error(errMsg);
+                       return;
+                     } else {
+                       throw new Error(errMsg);
+                     }
+                   }
+               }
+             }
 
-         function round(num, precision) {
-           if (precision === void 0) {
-             precision = 0;
+             return out;
+           }
+         }], [{
+           key: "parse",
+           value: function parse(tokens, options) {
+             var parser = new Parser(options);
+             return parser.parse(tokens);
            }
+           /**
+            * Static Parse Inline Method
+            */
 
-           if (precision && !(precision >= 0)) {
-             throw new Error("precision must be a positive number");
+         }, {
+           key: "parseInline",
+           value: function parseInline(tokens, options) {
+             var parser = new Parser(options);
+             return parser.parseInline(tokens);
            }
+         }]);
 
-           var multiplier = Math.pow(10, precision || 0);
-           return Math.round(num * multiplier) / multiplier;
-         }
-
-         exports.round = round;
-         /**
-          * Convert a distance measurement (assuming a spherical Earth) from radians to a more friendly unit.
-          * Valid units: miles, nauticalmiles, inches, yards, meters, metres, kilometers, centimeters, feet
-          *
-          * @name radiansToLength
-          * @param {number} radians in radians across the sphere
-          * @param {string} [units="kilometers"] can be degrees, radians, miles, or kilometers inches, yards, metres,
-          * meters, kilometres, kilometers.
-          * @returns {number} distance
-          */
-
-         function radiansToLength(radians, units) {
-           if (units === void 0) {
-             units = "kilometers";
-           }
+         return Parser;
+       }();
 
-           var factor = exports.factors[units];
+       var merge = helpers.merge,
+           checkSanitizeDeprecation = helpers.checkSanitizeDeprecation,
+           escape$1 = helpers.escape;
+       var getDefaults = defaults$5.getDefaults,
+           changeDefaults = defaults$5.changeDefaults,
+           defaults = defaults$5.defaults;
+       /**
+        * Marked
+        */
 
-           if (!factor) {
-             throw new Error(units + " units is invalid");
-           }
+       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 radians * factor;
+         if (typeof src !== 'string') {
+           throw new Error('marked(): input parameter is of type ' + Object.prototype.toString.call(src) + ', string expected');
          }
 
-         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
-          */
+         if (typeof opt === 'function') {
+           callback = opt;
+           opt = null;
+         }
 
-         function lengthToRadians(distance, units) {
-           if (units === void 0) {
-             units = "kilometers";
-           }
+         opt = merge({}, marked.defaults, opt || {});
+         checkSanitizeDeprecation(opt);
 
-           var factor = exports.factors[units];
+         if (callback) {
+           var highlight = opt.highlight;
+           var tokens;
 
-           if (!factor) {
-             throw new Error(units + " units is invalid");
+           try {
+             tokens = Lexer_1.lex(src, opt);
+           } catch (e) {
+             return callback(e);
            }
 
-           return distance / factor;
-         }
-
-         exports.lengthToRadians = lengthToRadians;
-         /**
-          * Convert a distance measurement (assuming a spherical Earth) from a real-world unit into degrees
-          * Valid units: miles, nauticalmiles, inches, yards, meters, metres, centimeters, kilometres, feet
-          *
-          * @name lengthToDegrees
-          * @param {number} distance in real units
-          * @param {string} [units="kilometers"] can be degrees, radians, miles, or kilometers inches, yards, metres,
-          * meters, kilometres, kilometers.
-          * @returns {number} degrees
-          */
+           var done = function done(err) {
+             var out;
 
-         function lengthToDegrees(distance, units) {
-           return radiansToDegrees(lengthToRadians(distance, units));
-         }
+             if (!err) {
+               try {
+                 if (opt.walkTokens) {
+                   marked.walkTokens(tokens, opt.walkTokens);
+                 }
 
-         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
-          */
+                 out = Parser_1.parse(tokens, opt);
+               } catch (e) {
+                 err = e;
+               }
+             }
 
-         function bearingToAzimuth(bearing) {
-           var angle = bearing % 360;
+             opt.highlight = highlight;
+             return err ? callback(err) : callback(null, out);
+           };
 
-           if (angle < 0) {
-             angle += 360;
+           if (!highlight || highlight.length < 3) {
+             return done();
            }
 
-           return angle;
-         }
+           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);
+                   }
 
-         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
-          */
+                   if (code != null && code !== token.text) {
+                     token.text = code;
+                     token.escaped = true;
+                   }
 
-         function radiansToDegrees(radians) {
-           var degrees = radians % (2 * Math.PI);
-           return degrees * 180 / Math.PI;
-         }
+                   pending--;
 
-         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
-          */
+                   if (pending === 0) {
+                     done();
+                   }
+                 });
+               }, 0);
+             }
+           });
+
+           if (pending === 0) {
+             done();
+           }
 
-         function degreesToRadians(degrees) {
-           var radians = degrees % 360;
-           return radians * Math.PI / 180;
+           return;
          }
 
-         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
-          */
+         try {
+           var _tokens = Lexer_1.lex(src, opt);
 
-         function convertLength(length, originalUnit, finalUnit) {
-           if (originalUnit === void 0) {
-             originalUnit = "kilometers";
+           if (opt.walkTokens) {
+             marked.walkTokens(_tokens, opt.walkTokens);
            }
 
-           if (finalUnit === void 0) {
-             finalUnit = "kilometers";
-           }
+           return Parser_1.parse(_tokens, opt);
+         } catch (e) {
+           e.message += '\nPlease report this to https://github.com/markedjs/marked.';
 
-           if (!(length >= 0)) {
-             throw new Error("length must be a positive number");
+           if (opt.silent) {
+             return '<p>An error occurred:</p><pre>' + escape$1(e.message + '', true) + '</pre>';
            }
 
-           return radiansToLength(lengthToRadians(length, originalUnit), finalUnit);
+           throw e;
          }
+       }
+       /**
+        * Options
+        */
 
-         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";
-           }
+       marked.options = marked.setOptions = function (opt) {
+         merge(marked.defaults, opt);
+         changeDefaults(marked.defaults);
+         return marked;
+       };
 
-           if (finalUnit === void 0) {
-             finalUnit = "kilometers";
-           }
+       marked.getDefaults = getDefaults;
+       marked.defaults = defaults;
+       /**
+        * Use Extension
+        */
 
-           if (!(area >= 0)) {
-             throw new Error("area must be a positive number");
-           }
+       marked.use = function (extension) {
+         var opts = merge({}, extension);
+
+         if (extension.renderer) {
+           (function () {
+             var renderer = marked.defaults.renderer || new Renderer_1();
 
-           var startFactor = exports.areaFactors[originalUnit];
+             var _loop = function _loop(prop) {
+               var prevRenderer = renderer[prop];
 
-           if (!startFactor) {
-             throw new Error("invalid original units");
-           }
+               renderer[prop] = function () {
+                 for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
+                   args[_key] = arguments[_key];
+                 }
 
-           var finalFactor = exports.areaFactors[finalUnit];
+                 var ret = extension.renderer[prop].apply(renderer, args);
 
-           if (!finalFactor) {
-             throw new Error("invalid final units");
-           }
+                 if (ret === false) {
+                   ret = prevRenderer.apply(renderer, args);
+                 }
 
-           return area / startFactor * finalFactor;
-         }
+                 return ret;
+               };
+             };
 
-         exports.convertArea = convertArea;
-         /**
-          * isNumber
-          *
-          * @param {*} num Number to validate
-          * @returns {boolean} true/false
-          * @example
-          * turf.isNumber(123)
-          * //=true
-          * turf.isNumber('foo')
-          * //=false
-          */
+             for (var prop in extension.renderer) {
+               _loop(prop);
+             }
 
-         function isNumber(num) {
-           return !isNaN(num) && num !== null && !Array.isArray(num) && !/^\s*$/.test(num);
+             opts.renderer = renderer;
+           })();
          }
 
-         exports.isNumber = isNumber;
-         /**
-          * isObject
-          *
-          * @param {*} input variable to validate
-          * @returns {boolean} true/false
-          * @example
-          * turf.isObject({elevation: 10})
-          * //=true
-          * turf.isObject('foo')
-          * //=false
-          */
+         if (extension.tokenizer) {
+           (function () {
+             var tokenizer = marked.defaults.tokenizer || new Tokenizer_1();
 
-         function isObject(input) {
-           return !!input && input.constructor === Object;
-         }
+             var _loop2 = function _loop2(prop) {
+               var prevTokenizer = tokenizer[prop];
 
-         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
-          */
+               tokenizer[prop] = function () {
+                 for (var _len2 = arguments.length, args = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
+                   args[_key2] = arguments[_key2];
+                 }
 
-         function validateBBox(bbox) {
-           if (!bbox) {
-             throw new Error("bbox is required");
-           }
+                 var ret = extension.tokenizer[prop].apply(tokenizer, args);
 
-           if (!Array.isArray(bbox)) {
-             throw new Error("bbox must be an Array");
-           }
+                 if (ret === false) {
+                   ret = prevTokenizer.apply(tokenizer, args);
+                 }
 
-           if (bbox.length !== 4 && bbox.length !== 6) {
-             throw new Error("bbox must be an Array of 4 or 6 numbers");
-           }
+                 return ret;
+               };
+             };
 
-           bbox.forEach(function (num) {
-             if (!isNumber(num)) {
-               throw new Error("bbox must only contain numbers");
+             for (var prop in extension.tokenizer) {
+               _loop2(prop);
              }
-           });
+
+             opts.tokenizer = tokenizer;
+           })();
          }
 
-         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
-          */
+         if (extension.walkTokens) {
+           var walkTokens = marked.defaults.walkTokens;
 
-         function validateId(id) {
-           if (!id) {
-             throw new Error("id is required");
-           }
+           opts.walkTokens = function (token) {
+             extension.walkTokens(token);
 
-           if (["string", "number"].indexOf(_typeof(id)) === -1) {
-             throw new Error("id must be a number or a string");
-           }
+             if (walkTokens) {
+               walkTokens(token);
+             }
+           };
          }
 
-         exports.validateId = validateId; // Deprecated methods
+         marked.setOptions(opts);
+       };
+       /**
+        * Run callback for every token
+        */
 
-         function radians2degrees() {
-           throw new Error("method has been renamed to `radiansToDegrees`");
-         }
 
-         exports.radians2degrees = radians2degrees;
+       marked.walkTokens = function (tokens, callback) {
+         var _iterator = _createForOfIteratorHelper(tokens),
+             _step;
 
-         function degrees2radians() {
-           throw new Error("method has been renamed to `degreesToRadians`");
-         }
+         try {
+           for (_iterator.s(); !(_step = _iterator.n()).done;) {
+             var token = _step.value;
+             callback(token);
 
-         exports.degrees2radians = degrees2radians;
+             switch (token.type) {
+               case 'table':
+                 {
+                   var _iterator2 = _createForOfIteratorHelper(token.tokens.header),
+                       _step2;
 
-         function distanceToDegrees() {
-           throw new Error("method has been renamed to `lengthToDegrees`");
-         }
+                   try {
+                     for (_iterator2.s(); !(_step2 = _iterator2.n()).done;) {
+                       var cell = _step2.value;
+                       marked.walkTokens(cell, callback);
+                     }
+                   } catch (err) {
+                     _iterator2.e(err);
+                   } finally {
+                     _iterator2.f();
+                   }
 
-         exports.distanceToDegrees = distanceToDegrees;
+                   var _iterator3 = _createForOfIteratorHelper(token.tokens.cells),
+                       _step3;
 
-         function distanceToRadians() {
-           throw new Error("method has been renamed to `lengthToRadians`");
-         }
+                   try {
+                     for (_iterator3.s(); !(_step3 = _iterator3.n()).done;) {
+                       var row = _step3.value;
 
-         exports.distanceToRadians = distanceToRadians;
+                       var _iterator4 = _createForOfIteratorHelper(row),
+                           _step4;
 
-         function radiansToDistance() {
-           throw new Error("method has been renamed to `radiansToLength`");
-         }
+                       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();
+                   }
+
+                   break;
+                 }
 
-         exports.radiansToDistance = radiansToDistance;
+               case 'list':
+                 {
+                   marked.walkTokens(token.items, callback);
+                   break;
+                 }
 
-         function bearingToAngle() {
-           throw new Error("method has been renamed to `bearingToAzimuth`");
+               default:
+                 {
+                   if (token.tokens) {
+                     marked.walkTokens(token.tokens, callback);
+                   }
+                 }
+             }
+           }
+         } catch (err) {
+           _iterator.e(err);
+         } finally {
+           _iterator.f();
          }
+       };
+       /**
+        * Parse Inline
+        */
 
-         exports.bearingToAngle = bearingToAngle;
 
-         function convertDistance() {
-           throw new Error("method has been renamed to `convertLength`");
+       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');
          }
 
-         exports.convertDistance = convertDistance;
-       });
+         if (typeof src !== 'string') {
+           throw new Error('marked.parseInline(): input parameter is of type ' + Object.prototype.toString.call(src) + ', string expected');
+         }
 
-       var invariant = createCommonjsModule(function (module, exports) {
+         opt = merge({}, marked.defaults, opt || {});
+         checkSanitizeDeprecation(opt);
 
-         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]
-          */
+         try {
+           var tokens = Lexer_1.lexInline(src, opt);
 
-         function getCoord(coord) {
-           if (!coord) {
-             throw new Error("coord is required");
+           if (opt.walkTokens) {
+             marked.walkTokens(tokens, opt.walkTokens);
            }
 
-           if (!Array.isArray(coord)) {
-             if (coord.type === "Feature" && coord.geometry !== null && coord.geometry.type === "Point") {
-               return coord.geometry.coordinates;
-             }
-
-             if (coord.type === "Point") {
-               return coord.coordinates;
-             }
-           }
+           return Parser_1.parseInline(tokens, opt);
+         } catch (e) {
+           e.message += '\nPlease report this to https://github.com/markedjs/marked.';
 
-           if (Array.isArray(coord) && coord.length >= 2 && !Array.isArray(coord[0]) && !Array.isArray(coord[1])) {
-             return coord;
+           if (opt.silent) {
+             return '<p>An error occurred:</p><pre>' + escape$1(e.message + '', true) + '</pre>';
            }
 
-           throw new Error("coord must be GeoJSON Point or an Array of numbers");
+           throw e;
          }
+       };
+       /**
+        * Expose
+        */
 
-         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
+       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;
 
+       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
 
-           if (coords.type === "Feature") {
-             if (coords.geometry !== null) {
-               return coords.geometry.coordinates;
-             }
-           } else {
-             // Geometry
-             if (coords.coordinates) {
-               return coords.coordinates;
-             }
-           }
+       var _cache;
 
-           throw new Error("coords must be GeoJSON Feature, Geometry Object or an Array");
+       function abortRequest$4(controller) {
+         if (controller) {
+           controller.abort();
          }
+       }
 
-         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;
-           }
+       function abortUnwantedRequests$1(cache, tiles) {
+         Object.keys(cache.inflightTile).forEach(function (k) {
+           var wanted = tiles.find(function (tile) {
+             return k === tile.id;
+           });
 
-           if (Array.isArray(coordinates[0]) && coordinates[0].length) {
-             return containsNumber(coordinates[0]);
+           if (!wanted) {
+             abortRequest$4(cache.inflightTile[k]);
+             delete cache.inflightTile[k];
            }
+         });
+       }
 
-           throw new Error("coordinates must only contain numbers");
-         }
+       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
 
-         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");
-           }
+       function updateRtree$1(item, replace) {
+         _cache.rtree.remove(item, function (a, b) {
+           return a.data.id === b.data.id;
+         });
 
-           if (!value || value.type !== type) {
-             throw new Error("Invalid input to " + name + ": must be a " + type + ", given " + value.type);
-           }
+         if (replace) {
+           _cache.rtree.insert(item);
          }
+       } // Issues shouldn't obscure each other
 
-         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");
-           }
+       function preventCoincident(loc) {
+         var coincident = false;
 
-           if (!name) {
-             throw new Error(".featureOf() requires a name");
-           }
+         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);
 
-           if (!feature || feature.type !== "Feature" || !feature.geometry) {
-             throw new Error("Invalid input to " + name + ", Feature with geometry required");
-           }
+         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]);
+             }, []);
+           });
 
-           if (!feature.geometry || feature.geometry.type !== type) {
-             throw new Error("Invalid input to " + name + ": must be a " + type + ", given " + feature.geometry.type);
+           if (!_cache) {
+             this.reset();
            }
-         }
 
-         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.
-          */
+           this.event = utilRebind(this, dispatch$5, 'on');
+         },
+         reset: function reset() {
+           var _strings = {};
+           var _colors = {};
 
-         function collectionOf(featureCollection, type, name) {
-           if (!featureCollection) {
-             throw new Error("No featureCollection passed");
-           }
+           if (_cache) {
+             Object.values(_cache.inflightTile).forEach(abortRequest$4); // Strings and colors are static and should not be re-populated
 
-           if (!name) {
-             throw new Error(".collectionOf() requires a name");
+             _strings = _cache.strings;
+             _colors = _cache.colors;
            }
 
-           if (!featureCollection || featureCollection.type !== "FeatureCollection") {
-             throw new Error("Invalid input to " + name + ", FeatureCollection required");
-           }
+           _cache = {
+             data: {},
+             loadedTile: {},
+             inflightTile: {},
+             inflightPost: {},
+             closed: {},
+             rtree: new RBush(),
+             strings: _strings,
+             colors: _colors
+           };
+         },
+         loadIssues: function loadIssues(projection) {
+           var _this = this;
 
-           for (var _i = 0, _a = featureCollection.features; _i < _a.length; _i++) {
-             var feature = _a[_i];
+           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
 
-             if (!feature || feature.type !== "Feature" || !feature.geometry) {
-               throw new Error("Invalid input to " + name + ", Feature with geometry required");
-             }
+           var tiles = tiler$4.zoomExtent([_tileZoom$1, _tileZoom$1]).getTiles(projection); // abort inflight requests that are no longer needed
 
-             if (!feature.geometry || feature.geometry.type !== type) {
-               throw new Error("Invalid input to " + name + ": must be a " + type + ", given " + feature.geometry.type);
-             }
-           }
-         }
+           abortUnwantedRequests$1(_cache, tiles); // issue new requests..
 
-         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]}
-          */
+           tiles.forEach(function (tile) {
+             if (_cache.loadedTile[tile.id] || _cache.inflightTile[tile.id]) return;
 
-         function getGeom(geojson) {
-           if (geojson.type === "Feature") {
-             return geojson.geometry;
-           }
+             var _tile$xyz = _slicedToArray(tile.xyz, 3),
+                 x = _tile$xyz[0],
+                 y = _tile$xyz[1],
+                 z = _tile$xyz[2];
 
-           return geojson;
-         }
+             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;
 
-         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"
-          */
+               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) */
 
-         function getType(geojson, name) {
-           if (geojson.type === "FeatureCollection") {
-             return "FeatureCollection";
-           }
+                   var itemType = "".concat(item, "-").concat(cl); // Filter out unsupported issue types (some are too specific or advanced)
 
-           if (geojson.type === "GeometryCollection") {
-             return "GeometryCollection";
-           }
+                   if (itemType in _osmoseData.icons) {
+                     var loc = issue.geometry.coordinates; // lon, lat
 
-           if (geojson.type === "Feature" && geojson.geometry !== null) {
-             return geojson.geometry.type;
-           }
+                     loc = preventCoincident(loc);
+                     var d = new QAItem(loc, _this, itemType, id, {
+                       item: item
+                     }); // Setting elems here prevents UI detail requests
 
-           return geojson.type;
-         }
+                     if (item === 8300 || item === 8360) {
+                       d.elems = [];
+                     }
 
-         exports.getType = getType;
-       });
+                     _cache.data[d.id] = d;
 
-       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
+                     _cache.rtree.insert(encodeIssueRtree(d));
+                   }
+                 });
+               }
 
-       function lineclip(points, bbox, result) {
-         var len = points.length,
-             codeA = bitCode(points[0], bbox),
-             part = [],
-             i,
-             a,
-             b,
-             codeB,
-             lastCode;
-         if (!result) result = [];
+               dispatch$5.call('loaded');
+             })["catch"](function () {
+               delete _cache.inflightTile[tile.id];
+               _cache.loadedTile[tile.id] = true;
+             });
+           });
+         },
+         loadIssueDetail: function loadIssueDetail(issue) {
+           var _this2 = this;
 
-         for (i = 1; i < len; i++) {
-           a = points[i - 1];
-           b = points[i];
-           codeB = lastCode = bitCode(b, bbox);
+           // Issue details only need to be fetched once
+           if (issue.elems !== undefined) {
+             return Promise.resolve(issue);
+           }
 
-           while (true) {
-             if (!(codeA | codeB)) {
-               // accept
-               part.push(a);
+           var url = "".concat(_osmoseUrlRoot, "/issue/").concat(issue.id, "?langs=").concat(_mainLocalizer.localeCode());
 
-               if (codeB !== lastCode) {
-                 // segment went outside
-                 part.push(b);
+           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 (i < len - 1) {
-                   // start a new line
-                   result.push(part);
-                   part = [];
-                 }
-               } else if (i === len - 1) {
-                 part.push(b);
-               }
+             issue.detail = data.subtitle ? marked_1(data.subtitle.auto) : '';
 
-               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);
-             }
-           }
+             _this2.replaceItem(issue);
+           };
 
-           codeA = lastCode;
-         }
+           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);
 
-         if (part.length) result.push(part);
-         return result;
-       } // Sutherland-Hodgeman polygon clipping algorithm
+           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 polygonclip(points, bbox) {
-         var result, edge, prev, prevInside, i, p, inside; // clip against each side of the clip rectangle
+           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
 
-         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
+           var allRequests = items.map(function (itemType) {
+             // No need to request data we already have
+             if (itemType in _cache.strings[locale]) return null;
 
-             if (inside !== prevInside) result.push(intersect(prev, p, edge, bbox));
-             if (inside) result.push(p); // add a point if it's inside
+             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$categories$;
 
-             prev = p;
-             prevInside = inside;
-           }
+               var _cat$items = _slicedToArray(cat.items, 1),
+                   _cat$items$ = _cat$items[0],
+                   item = _cat$items$ === void 0 ? {
+                 "class": []
+               } : _cat$items$;
 
-           points = result;
-           if (!points.length) break;
-         }
+               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)
 
-         return result;
-       } // intersect a segment against one of the 4 lines that make up the bbox
 
+               if (!cl) {
+                 /* eslint-disable no-console */
+                 console.log("Osmose strings request (".concat(itemType, ") had unexpected data"));
+                 /* eslint-enable no-console */
 
-       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
+                 return;
+               } // Cache served item colors to automatically style issue markers later
 
 
-       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 itemInt = item.item,
+                   color = item.color;
 
-         if (p[1] < bbox[1]) code |= 4; // bottom
-         else if (p[1] > bbox[3]) code |= 8; // top
+               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
 
-         return code;
-       }
-       lineclip_1["default"] = _default;
 
-       var bboxClip_1 = createCommonjsModule(function (module, exports) {
+               var title = cl.title,
+                   detail = cl.detail,
+                   fix = cl.fix,
+                   trap = cl.trap; // Osmose titles shouldn't contain markdown
 
-         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 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;
+             };
 
-         Object.defineProperty(exports, "__esModule", {
-           value: true
-         });
+             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
 
-         var lineclip = __importStar(lineclip_1);
-         /**
-          * Takes a {@link Feature} and a bbox and clips the feature to the bbox using
-          * [lineclip](https://github.com/mapbox/lineclip).
-          * May result in degenerate edges when clipping Polygons.
-          *
-          * @name bboxClip
-          * @param {Feature<LineString|MultiLineString|Polygon|MultiPolygon>} feature feature to clip to the bbox
-          * @param {BBox} bbox extent in [minX, minY, maxX, maxY] order
-          * @returns {Feature<LineString|MultiLineString|Polygon|MultiPolygon>} clipped Feature
-          * @example
-          * var bbox = [0, 0, 10, 10];
-          * var poly = turf.polygon([[[2, 2], [8, 4], [12, 8], [3, 7], [2, 2]]]);
-          *
-          * var clipped = turf.bboxClip(poly, bbox);
-          *
-          * //addToMap
-          * var addToMap = [bbox, poly, clipped]
-          */
 
+             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;
+
+           if (_cache.inflightPost[issue.id]) {
+             return callback({
+               message: 'Issue update already inflight',
+               status: -2
+             }, issue);
+           } // UI sets the status to either 'done' or 'false'
 
-         function 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 = [];
+           var url = "".concat(_osmoseUrlRoot, "/issue/").concat(issue.id, "/").concat(issue.newStatus);
+           var controller = new AbortController();
 
-               if (type === "LineString") {
-                 coords = [coords];
-               }
+           var after = function after() {
+             delete _cache.inflightPost[issue.id];
 
-               coords.forEach(function (line) {
-                 lineclip.polyline(line, bbox, lines_1);
-               });
+             _this3.removeItem(issue);
 
-               if (lines_1.length === 1) {
-                 return helpers$1.lineString(lines_1[0], properties);
+             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;
                }
 
-               return helpers$1.multiLineString(lines_1, properties);
+               _cache.closed[issue.item] += 1;
+             }
 
-             case "Polygon":
-               return helpers$1.polygon(clipPolygon(coords, bbox), properties);
+             if (callback) callback(null, issue);
+           };
 
-             case "MultiPolygon":
-               return helpers$1.multiPolygon(coords.map(function (poly) {
-                 return clipPolygon(poly, bbox);
-               }), properties);
+           _cache.inflightPost[issue.id] = controller;
+           fetch(url, {
+             signal: controller.signal
+           }).then(after)["catch"](function (err) {
+             delete _cache.inflightPost[issue.id];
+             if (callback) callback(err.message);
+           });
+         },
+         // Get all cached QAItems covering the viewport
+         getItems: function getItems(projection) {
+           var viewport = projection.clipExtent();
+           var min = [viewport[0][0], viewport[1][1]];
+           var max = [viewport[1][0], viewport[0][1]];
+           var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
+           return _cache.rtree.search(bbox).map(function (d) {
+             return d.data;
+           });
+         },
+         // Get a QAItem from cache
+         // NOTE: Don't change method name until UI v3 is merged
+         getError: function getError(id) {
+           return _cache.data[id];
+         },
+         // get the name of the icon to display for this item
+         getIcon: function getIcon(itemType) {
+           return _osmoseData.icons[itemType];
+         },
+         // Replace a single QAItem in the cache
+         replaceItem: function replaceItem(item) {
+           if (!(item instanceof QAItem) || !item.id) return;
+           _cache.data[item.id] = item;
+           updateRtree$1(encodeIssueRtree(item), true); // true = replace
 
-             default:
-               throw new Error("geometry " + type + " not supported");
-           }
+           return item;
+         },
+         // Remove a single QAItem from the cache
+         removeItem: function removeItem(item) {
+           if (!(item instanceof QAItem) || !item.id) return;
+           delete _cache.data[item.id];
+           updateRtree$1(encodeIssueRtree(item), false); // false = remove
+         },
+         // Used to populate `closed:osmose:*` changeset tags
+         getClosedCounts: function getClosedCounts() {
+           return _cache.closed;
+         },
+         itemURL: function itemURL(item) {
+           return "https://osmose.openstreetmap.fr/en/error/".concat(item.id);
          }
+       };
 
-         exports["default"] = bboxClip;
-
-         function clipPolygon(rings, bbox) {
-           var outRings = [];
+       /*! ieee754. BSD-3-Clause License. Feross Aboukhadijeh <https://feross.org/opensource> */
+       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;
 
-           for (var _i = 0, rings_1 = rings; _i < rings_1.length; _i++) {
-             var ring = rings_1[_i];
-             var clipped = lineclip.polygon(ring, bbox);
+         for (; nBits > 0; e = e * 256 + buffer[offset + i], i += d, nBits -= 8) {}
 
-             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]);
-               }
+         m = e & (1 << -nBits) - 1;
+         e >>= -nBits;
+         nBits += mLen;
 
-               if (clipped.length >= 4) {
-                 outRings.push(clipped);
-               }
-             }
-           }
+         for (; nBits > 0; m = m * 256 + buffer[offset + i], i += d, nBits -= 8) {}
 
-           return outRings;
+         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;
          }
-       });
-       var turf_bboxClip = /*@__PURE__*/getDefaultExportFromCjs(bboxClip_1);
 
-       var fastJsonStableStringify = function fastJsonStableStringify(data, opts) {
-         if (!opts) opts = {};
-         if (typeof opts === 'function') opts = {
-           cmp: opts
-         };
-         var cycles = typeof opts.cycles === 'boolean' ? opts.cycles : false;
+         return (s ? -1 : 1) * m * Math.pow(2, e - mLen);
+       };
 
-         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 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);
 
-         var seen = [];
-         return function stringify(node) {
-           if (node && node.toJSON && typeof node.toJSON === 'function') {
-             node = node.toJSON();
-           }
+         if (isNaN(value) || value === Infinity) {
+           m = isNaN(value) ? 1 : 0;
+           e = eMax;
+         } else {
+           e = Math.floor(Math.log(value) / Math.LN2);
 
-           if (node === undefined) return;
-           if (typeof node == 'number') return isFinite(node) ? '' + node : 'null';
-           if (_typeof(node) !== 'object') return JSON.stringify(node);
-           var i, out;
+           if (value * (c = Math.pow(2, -e)) < 1) {
+             e--;
+             c *= 2;
+           }
 
-           if (Array.isArray(node)) {
-             out = '[';
+           if (e + eBias >= 1) {
+             value += rt / c;
+           } else {
+             value += rt * Math.pow(2, 1 - eBias);
+           }
 
-             for (i = 0; i < node.length; i++) {
-               if (i) out += ',';
-               out += stringify(node[i]) || 'null';
-             }
+           if (value * c >= 2) {
+             e++;
+             c /= 2;
+           }
 
-             return out + ']';
+           if (e + eBias >= eMax) {
+             m = 0;
+             e = eMax;
+           } else if (e + eBias >= 1) {
+             m = (value * c - 1) * Math.pow(2, mLen);
+             e = e + eBias;
+           } else {
+             m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen);
+             e = 0;
            }
+         }
 
-           if (node === null) return 'null';
+         for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}
 
-           if (seen.indexOf(node) !== -1) {
-             if (cycles) return JSON.stringify('__cycle__');
-             throw new TypeError('Converting circular structure to JSON');
-           }
+         e = e << mLen | m;
+         eLen += mLen;
 
-           var seenIndex = seen.push(node) - 1;
-           var keys = Object.keys(node).sort(cmp && cmp(node));
-           out = '';
+         for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}
 
-           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;
-           }
+         buffer[offset + i - d] |= s * 128;
+       };
 
-           seen.splice(seenIndex, 1);
-           return '{' + out + '}';
-         }(data);
+       var ieee754 = {
+         read: read$6,
+         write: write$6
        };
 
-       function DEFAULT_COMPARE(a, b) {
-         return a > b ? 1 : a < b ? -1 : 0;
-       }
+       var pbf = Pbf;
 
-       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 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;
+       }
 
-           _classCallCheck(this, SplayTree);
+       Pbf.Varint = 0; // varint: int32, int64, uint32, uint64, sint32, sint64, bool, enum
 
-           this._compare = compare;
-           this._root = null;
-           this._size = 0;
-           this._noDuplicates = !!noDuplicates;
-         }
+       Pbf.Fixed64 = 1; // 64-bit: double, fixed64, sfixed64
 
-         _createClass(SplayTree, [{
-           key: "rotateLeft",
-           value: function rotateLeft(x) {
-             var y = x.right;
+       Pbf.Bytes = 2; // length-delimited: string, bytes, embedded messages, packed repeated fields
 
-             if (y) {
-               x.right = y.left;
-               if (y.left) y.left.parent = x;
-               y.parent = x.parent;
-             }
+       Pbf.Fixed32 = 5; // 32-bit: float, fixed32, sfixed32
 
-             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;
+       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 (y) {
-               x.left = y.right;
-               if (y.right) y.right.parent = x;
-               y.parent = x.parent;
-             }
+       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;
 
-             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 (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);
            }
-         }, {
-           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;
+           return result;
+         },
+         readMessage: function readMessage(readField, result) {
+           return this.readFields(readField, result, this.readVarint() + this.pos);
+         },
+         readFixed32: function readFixed32() {
+           var val = readUInt32(this.buf, this.pos);
+           this.pos += 4;
+           return val;
+         },
+         readSFixed32: function readSFixed32() {
+           var val = readInt32(this.buf, this.pos);
+           this.pos += 4;
+           return val;
+         },
+         // 64-bit int handling is based on github.com/dpw/node-buffer-more-ints (MIT-licensed)
+         readFixed64: function readFixed64() {
+           var val = readUInt32(this.buf, this.pos) + readUInt32(this.buf, this.pos + 4) * SHIFT_LEFT_32;
+           this.pos += 8;
+           return val;
+         },
+         readSFixed64: function readSFixed64() {
+           var val = readUInt32(this.buf, this.pos) + readInt32(this.buf, this.pos + 4) * SHIFT_LEFT_32;
+           this.pos += 8;
+           return val;
+         },
+         readFloat: function readFloat() {
+           var val = ieee754.read(this.buf, this.pos, true, 23, 4);
+           this.pos += 4;
+           return val;
+         },
+         readDouble: function readDouble() {
+           var val = ieee754.read(this.buf, this.pos, true, 52, 8);
+           this.pos += 8;
+           return val;
+         },
+         readVarint: function readVarint(isSigned) {
+           var buf = this.buf,
+               val,
+               b;
+           b = buf[this.pos++];
+           val = b & 0x7f;
+           if (b < 0x80) return val;
+           b = buf[this.pos++];
+           val |= (b & 0x7f) << 7;
+           if (b < 0x80) return val;
+           b = buf[this.pos++];
+           val |= (b & 0x7f) << 14;
+           if (b < 0x80) return val;
+           b = buf[this.pos++];
+           val |= (b & 0x7f) << 21;
+           if (b < 0x80) return val;
+           b = buf[this.pos];
+           val |= (b & 0x0f) << 28;
+           return readVarintRemainder(val, isSigned, this);
+         },
+         readVarint64: function readVarint64() {
+           // for compatibility with v2.0.1
+           return this.readVarint(true);
+         },
+         readSVarint: function readSVarint() {
+           var num = this.readVarint();
+           return num % 2 === 1 ? (num + 1) / -2 : num / 2; // zigzag encoding
+         },
+         readBoolean: function readBoolean() {
+           return Boolean(this.readVarint());
+         },
+         readString: function readString() {
+           var end = this.readVarint() + this.pos;
+           var pos = this.pos;
+           this.pos = end;
 
-               if (x === p.left) {
-                 // left
-                 if (gp) {
-                   if (gp.left === p) {
-                     /* zig-zig */
-                     if (p.right) {
-                       gp.left = p.right;
-                       gp.left.parent = gp;
-                     } else gp.left = null;
+           if (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
 
-                     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;
+           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 || [];
 
-                 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;
-                   }
-                 }
+           while (this.pos < end) {
+             arr.push(this.readVarint(isSigned));
+           }
 
-                 if (l) {
-                   p.right = l;
-                   l.parent = p;
-                 } else p.right = null;
+           return arr;
+         },
+         readPackedSVarint: function readPackedSVarint(arr) {
+           if (this.type !== Pbf.Bytes) return arr.push(this.readSVarint());
+           var end = readPackedEnd(this);
+           arr = arr || [];
 
-                 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;
+           while (this.pos < end) {
+             arr.push(this.readSVarint());
            }
-         }, {
-           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;
-               }
-             }
 
-             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;
+           return arr;
+         },
+         readPackedBoolean: function readPackedBoolean(arr) {
+           if (this.type !== Pbf.Bytes) return arr.push(this.readBoolean());
+           var end = readPackedEnd(this);
+           arr = arr || [];
+
+           while (this.pos < end) {
+             arr.push(this.readBoolean());
            }
-         }, {
-           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;
-             }
+           return arr;
+         },
+         readPackedFloat: function readPackedFloat(arr) {
+           if (this.type !== Pbf.Bytes) return arr.push(this.readFloat());
+           var end = readPackedEnd(this);
+           arr = arr || [];
 
-             return null;
+           while (this.pos < end) {
+             arr.push(this.readFloat());
            }
-           /**
-            * 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 arr;
+         },
+         readPackedDouble: function readPackedDouble(arr) {
+           if (this.type !== Pbf.Bytes) return arr.push(this.readDouble());
+           var end = readPackedEnd(this);
+           arr = arr || [];
 
-             return false;
+           while (this.pos < end) {
+             arr.push(this.readDouble());
            }
-         }, {
-           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 (y.parent !== z) {
-                 this.replace(y, y.right);
-                 y.right = z.right;
-                 y.right.parent = y;
-               }
+           return arr;
+         },
+         readPackedFixed32: function readPackedFixed32(arr) {
+           if (this.type !== Pbf.Bytes) return arr.push(this.readFixed32());
+           var end = readPackedEnd(this);
+           arr = arr || [];
 
-               this.replace(z, y);
-               y.left = z.left;
-               y.left.parent = y;
-             }
-             this._size--;
-             return true;
+           while (this.pos < end) {
+             arr.push(this.readFixed32());
            }
-         }, {
-           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;
-               }
+           return arr;
+         },
+         readPackedSFixed32: function readPackedSFixed32(arr) {
+           if (this.type !== Pbf.Bytes) return arr.push(this.readSFixed32());
+           var end = readPackedEnd(this);
+           arr = arr || [];
 
-               this.replace(z, y);
-               y.left = z.left;
-               y.left.parent = y;
-             }
-             this._size--;
-             return true;
+           while (this.pos < end) {
+             arr.push(this.readSFixed32());
            }
-         }, {
-           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;
-             }
 
-             if (t) {
-               if (s) sMax.right = t;else this._root = t;
-               t.parent = sMax;
-             }
+           return arr;
+         },
+         readPackedFixed64: function readPackedFixed64(arr) {
+           if (this.type !== Pbf.Bytes) return arr.push(this.readFixed64());
+           var end = readPackedEnd(this);
+           arr = arr || [];
 
-             this._size--;
+           while (this.pos < end) {
+             arr.push(this.readFixed64());
            }
-           /**
-            * Removes and returns the node with smallest key
-            * @return {?Node}
-            */
 
-         }, {
-           key: "pop",
-           value: function pop() {
-             var node = this._root,
-                 returnValue = null;
+           return arr;
+         },
+         readPackedSFixed64: function readPackedSFixed64(arr) {
+           if (this.type !== Pbf.Bytes) return arr.push(this.readSFixed64());
+           var end = readPackedEnd(this);
+           arr = arr || [];
 
-             if (node) {
-               while (node.left) {
-                 node = node.left;
-               }
+           while (this.pos < end) {
+             arr.push(this.readSFixed64());
+           }
 
-               returnValue = {
-                 key: node.key,
-                 data: node.data
-               };
-               this.remove(node.key);
-             }
+           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;
 
-             return returnValue;
+           while (length < this.pos + min) {
+             length *= 2;
            }
-           /* eslint-disable class-methods-use-this */
 
-           /**
-            * Successor node
-            * @param  {Node} node
-            * @return {?Node}
-            */
+           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;
 
-         }, {
-           key: "next",
-           value: function next(node) {
-             var successor = node;
+           if (val > 0xfffffff || val < 0) {
+             writeBigVarint(val, this);
+             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
 
-             if (successor) {
-               if (successor.right) {
-                 successor = successor.right;
+           var startPos = this.pos; // write the string directly to the buffer and see how much was written
 
-                 while (successor && successor.left) {
-                   successor = successor.left;
-                 }
-               } else {
-                 successor = node.parent;
+           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
 
-                 while (successor && successor.right === node) {
-                   node = successor;
-                   successor = successor.parent;
-                 }
-               }
-             }
+           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);
 
-             return successor;
+           for (var i = 0; i < len; i++) {
+             this.buf[this.pos++] = buffer[i];
            }
-           /**
-            * Predecessor node
-            * @param  {Node} node
-            * @return {?Node}
-            */
-
-         }, {
-           key: "prev",
-           value: function prev(node) {
-             var predecessor = node;
+         },
+         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 (predecessor) {
-               if (predecessor.left) {
-                 predecessor = predecessor.left;
+           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
 
-                 while (predecessor && predecessor.right) {
-                   predecessor = predecessor.right;
-                 }
-               } else {
-                 predecessor = node.parent;
+           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));
+         }
+       };
 
-                 while (predecessor && predecessor.left === node) {
-                   node = predecessor;
-                   predecessor = predecessor.parent;
-                 }
-               }
-             }
+       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');
+       }
 
-             return predecessor;
-           }
-           /* eslint-enable class-methods-use-this */
+       function readPackedEnd(pbf) {
+         return pbf.type === Pbf.Bytes ? pbf.readVarint() + pbf.pos : pbf.pos + 1;
+       }
 
-           /**
-            * @param  {forEachCallback} callback
-            * @return {SplayTree}
-            */
+       function toNum(low, high, isSigned) {
+         if (isSigned) {
+           return high * 0x100000000 + (low >>> 0);
+         }
 
-         }, {
-           key: "forEach",
-           value: function forEach(callback) {
-             var current = this._root;
-             var s = [],
-                 done = false,
-                 i = 0;
+         return (high >>> 0) * 0x100000000 + (low >>> 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
+       function writeBigVarint(val, pbf) {
+         var low, high;
 
-                   current = current.right;
-                 } else done = true;
-               }
-             }
+         if (val >= 0) {
+           low = val % 0x100000000 | 0;
+           high = val / 0x100000000 | 0;
+         } else {
+           low = ~(-val % 0x100000000);
+           high = ~(-val / 0x100000000);
 
-             return this;
+           if (low ^ 0xffffffff) {
+             low = low + 1 | 0;
+           } else {
+             low = 0;
+             high = high + 1 | 0;
            }
-           /**
-            * 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}
-            */
+         }
 
-         }, {
-           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);
+         if (val >= 0x10000000000000000 || val < -0x10000000000000000) {
+           throw new Error('Given varint doesn\'t fit into 10 bytes');
+         }
 
-                 if (cmp > 0) {
-                   break;
-                 } else if (compare(node.key, low) >= 0) {
-                   if (fn.call(ctx, node)) return this; // stop if smth is returned
-                 }
+         pbf.realloc(10);
+         writeBigVarintLow(low, high, pbf);
+         writeBigVarintHigh(high, pbf);
+       }
 
-                 node = node.right;
-               }
-             }
+       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;
+       }
 
-             return this;
-           }
-           /**
-            * Returns all keys in order
-            * @return {Array<Key>}
-            */
+       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;
+       }
 
-         }, {
-           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;
-               }
-             }
+       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
 
-             return r;
-           }
-           /**
-            * Returns `data` fields of all nodes in order.
-            * @return {Array<Value>}
-            */
+         pbf.realloc(extraLen);
 
-         }, {
-           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;
-               }
-             }
+         for (var i = pbf.pos - 1; i >= startPos; i--) {
+           pbf.buf[i + extraLen] = pbf.buf[i];
+         }
+       }
 
-             return r;
-           }
-           /**
-            * Returns node at given index
-            * @param  {number} index
-            * @return {?Node}
-            */
+       function _writePackedVarint(arr, pbf) {
+         for (var i = 0; i < arr.length; i++) {
+           pbf.writeVarint(arr[i]);
+         }
+       }
 
-         }, {
-           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;
+       function _writePackedSVarint(arr, pbf) {
+         for (var i = 0; i < arr.length; i++) {
+           pbf.writeSVarint(arr[i]);
+         }
+       }
 
-             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;
-               }
-             }
+       function _writePackedFloat(arr, pbf) {
+         for (var i = 0; i < arr.length; i++) {
+           pbf.writeFloat(arr[i]);
+         }
+       }
 
-             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}
-            */
+       function _writePackedDouble(arr, pbf) {
+         for (var i = 0; i < arr.length; i++) {
+           pbf.writeDouble(arr[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}
-            */
+       function _writePackedBoolean(arr, pbf) {
+         for (var i = 0; i < arr.length; i++) {
+           pbf.writeBoolean(arr[i]);
+         }
+       }
 
-         }], [{
-           key: "createTree",
-           value: function createTree(keys, values, comparator, presort, noDuplicates) {
-             return new SplayTree(comparator, noDuplicates).load(keys, values, presort);
-           }
-         }]);
+       function _writePackedFixed(arr, pbf) {
+         for (var i = 0; i < arr.length; i++) {
+           pbf.writeFixed32(arr[i]);
+         }
+       }
+
+       function _writePackedSFixed(arr, pbf) {
+         for (var i = 0; i < arr.length; i++) {
+           pbf.writeSFixed32(arr[i]);
+         }
+       }
+
+       function _writePackedFixed2(arr, pbf) {
+         for (var i = 0; i < arr.length; i++) {
+           pbf.writeFixed64(arr[i]);
+         }
+       }
 
-         return SplayTree;
-       }();
+       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
 
-       function loadRecursive(parent, keys, values, start, end) {
-         var size = end - start;
 
-         if (size > 0) {
-           var middle = start + Math.floor(size / 2);
-           var key = keys[middle];
-           var data = values[middle];
-           var node = {
-             key: key,
-             data: data,
-             parent: parent
-           };
-           node.left = loadRecursive(node, keys, values, start, middle);
-           node.right = loadRecursive(node, keys, values, middle + 1, end);
-           return node;
-         }
+       function readUInt32(buf, pos) {
+         return (buf[pos] | buf[pos + 1] << 8 | buf[pos + 2] << 16) + buf[pos + 3] * 0x1000000;
+       }
 
-         return null;
+       function writeInt32(buf, val, pos) {
+         buf[pos] = val;
+         buf[pos + 1] = val >>> 8;
+         buf[pos + 2] = val >>> 16;
+         buf[pos + 3] = val >>> 24;
        }
 
-       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;
+       function readInt32(buf, pos) {
+         return (buf[pos] | buf[pos + 1] << 8 | buf[pos + 2] << 16) + (buf[pos + 3] << 24);
+       }
 
-         while (true) {
-           do {
-             i++;
-           } while (compare(keys[i], pivot) < 0);
+       function readUtf8(buf, pos, end) {
+         var str = '';
+         var i = pos;
 
-           do {
-             j--;
-           } while (compare(keys[j], pivot) > 0);
+         while (i < end) {
+           var b0 = buf[i];
+           var c = null; // codepoint
 
-           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 bytesPerSequence = b0 > 0xEF ? 4 : b0 > 0xDF ? 3 : b0 > 0xBF ? 2 : 1;
+           if (i + bytesPerSequence > end) break;
+           var b1, b2, b3;
 
-         sort(keys, values, left, j, compare);
-         sort(keys, values, j + 1, right, compare);
-       }
+           if (bytesPerSequence === 1) {
+             if (b0 < 0x80) {
+               c = b0;
+             }
+           } else if (bytesPerSequence === 2) {
+             b1 = buf[i + 1];
 
-       var NORMAL = 0;
-       var NON_CONTRIBUTING = 1;
-       var SAME_TRANSITION = 2;
-       var DIFFERENT_TRANSITION = 3;
+             if ((b1 & 0xC0) === 0x80) {
+               c = (b0 & 0x1F) << 0x6 | b1 & 0x3F;
 
-       var INTERSECTION = 0;
-       var UNION = 1;
-       var DIFFERENCE = 2;
-       var XOR = 3;
+               if (c <= 0x7F) {
+                 c = null;
+               }
+             }
+           } else if (bytesPerSequence === 3) {
+             b1 = buf[i + 1];
+             b2 = buf[i + 2];
 
-       /**
-        * @param  {SweepEvent} event
-        * @param  {SweepEvent} prev
-        * @param  {Operation} operation
-        */
+             if ((b1 & 0xC0) === 0x80 && (b2 & 0xC0) === 0x80) {
+               c = (b0 & 0xF) << 0xC | (b1 & 0x3F) << 0x6 | b2 & 0x3F;
 
-       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
+               if (c <= 0x7FF || c >= 0xD800 && c <= 0xDFFF) {
+                 c = null;
+               }
+             }
+           } else if (bytesPerSequence === 4) {
+             b1 = buf[i + 1];
+             b2 = buf[i + 2];
+             b3 = buf[i + 3];
 
+             if ((b1 & 0xC0) === 0x80 && (b2 & 0xC0) === 0x80 && (b3 & 0xC0) === 0x80) {
+               c = (b0 & 0xF) << 0x12 | (b1 & 0x3F) << 0xC | (b2 & 0x3F) << 0x6 | b3 & 0x3F;
 
-           if (prev) {
-             event.prevInResult = !inResult(prev, operation) || prev.isVertical() ? prev.prevInResult : prev;
+               if (c <= 0xFFFF || c >= 0x110000) {
+                 c = null;
+               }
+             }
            }
-         } // check if the line segment belongs to the Boolean operation
-
 
-         var isInResult = inResult(event, operation);
+           if (c === null) {
+             c = 0xFFFD;
+             bytesPerSequence = 1;
+           } else if (c > 0xFFFF) {
+             c -= 0x10000;
+             str += String.fromCharCode(c >>> 10 & 0x3FF | 0xD800);
+             c = 0xDC00 | c & 0x3FF;
+           }
 
-         if (isInResult) {
-           event.resultTransition = determineResultTransition(event, operation);
-         } else {
-           event.resultTransition = 0;
+           str += String.fromCharCode(c);
+           i += bytesPerSequence;
          }
+
+         return str;
        }
-       /* eslint-disable indent */
 
-       function inResult(event, operation) {
-         switch (event.type) {
-           case NORMAL:
-             switch (operation) {
-               case INTERSECTION:
-                 return !event.otherInOut;
+       function readUtf8TextDecoder(buf, pos, end) {
+         return utf8TextDecoder.decode(buf.subarray(pos, end));
+       }
 
-               case UNION:
-                 return event.otherInOut;
+       function writeUtf8(buf, str, pos) {
+         for (var i = 0, c, lead; i < str.length; i++) {
+           c = str.charCodeAt(i); // code point
 
-               case DIFFERENCE:
-                 // return (event.isSubject && !event.otherInOut) ||
-                 //         (!event.isSubject && event.otherInOut);
-                 return event.isSubject && event.otherInOut || !event.isSubject && !event.otherInOut;
+           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;
+               }
 
-               case XOR:
-                 return true;
+               continue;
              }
+           } else if (lead) {
+             buf[pos++] = 0xEF;
+             buf[pos++] = 0xBF;
+             buf[pos++] = 0xBD;
+             lead = null;
+           }
 
-             break;
-
-           case SAME_TRANSITION:
-             return operation === INTERSECTION || operation === UNION;
+           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;
+               }
 
-           case DIFFERENT_TRANSITION:
-             return operation === DIFFERENCE;
+               buf[pos++] = c >> 0x6 & 0x3F | 0x80;
+             }
 
-           case NON_CONTRIBUTING:
-             return false;
+             buf[pos++] = c & 0x3F | 0x80;
+           }
          }
 
-         return false;
+         return pos;
        }
-       /* eslint-enable indent */
 
+       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 determineResultTransition(event, operation) {
-         var thisIn = !event.inOut;
-         var thatIn = !event.otherInOut;
-         var isIn;
+       function Point(x, y) {
+         this.x = x;
+         this.y = y;
+       }
 
-         switch (operation) {
-           case INTERSECTION:
-             isIn = thisIn && thatIn;
-             break;
+       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);
+         },
 
-           case UNION:
-             isIn = thisIn || thatIn;
-             break;
+         /**
+          * 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);
+         },
 
-           case XOR:
-             isIn = thisIn ^ thatIn;
-             break;
+         /**
+          * 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);
+         },
 
-           case DIFFERENCE:
-             if (event.isSubject) {
-               isIn = thisIn && !thatIn;
-             } else {
-               isIn = thatIn && !thisIn;
-             }
+         /**
+          * 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);
+         },
 
-             break;
-         }
+         /**
+          * 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);
+         },
 
-         return isIn ? +1 : -1;
-       }
+         /**
+          * 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);
+         },
 
-       var SweepEvent = /*#__PURE__*/function () {
          /**
-          * Sweepline event
-          *
-          * @class {SweepEvent}
-          * @param {Array.<Number>}  point
-          * @param {Boolean}         left
-          * @param {SweepEvent=}     otherEvent
-          * @param {Boolean}         isSubject
-          * @param {Number}          edgeType
+          * Divide this point's x & y coordinates by a factor,
+          * yielding a new point.
+          * @param {Point} k factor
+          * @return {Point} output point
           */
-         function SweepEvent(point, left, otherEvent, isSubject, edgeType) {
-           _classCallCheck(this, SweepEvent);
+         div: function div(k) {
+           return this.clone()._div(k);
+         },
 
-           /**
-            * Is left endpoint?
-            * @type {Boolean}
-            */
-           this.left = left;
-           /**
-            * @type {Array.<Number>}
-            */
+         /**
+          * 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);
+         },
 
-           this.point = point;
-           /**
-            * Other edge reference
-            * @type {SweepEvent}
-            */
+         /**
+          * 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);
+         },
 
-           this.otherEvent = otherEvent;
-           /**
-            * Belongs to source or clipping polygon
-            * @type {Boolean}
-            */
+         /**
+          * 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);
+         },
 
-           this.isSubject = isSubject;
-           /**
-            * Edge contribution type
-            * @type {Number}
-            */
+         /**
+          * 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();
+         },
 
-           this.type = edgeType || NORMAL;
-           /**
-            * In-out transition for the sweepline crossing polygon
-            * @type {Boolean}
-            */
+         /**
+          * 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();
+         },
 
-           this.inOut = false;
-           /**
-            * @type {Boolean}
-            */
+         /**
+          * 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();
+         },
 
-           this.otherInOut = false;
-           /**
-            * Previous event in result?
-            * @type {SweepEvent}
-            */
+         /**
+          * 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);
+         },
 
-           this.prevInResult = null;
-           /**
-            * Type of result transition (0 = not in result, +1 = out-in, -1, in-out)
-            * @type {Number}
-            */
+         /**
+          * 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;
+         },
 
-           this.resultTransition = 0; // connection step
+         /**
+          * 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));
+         },
 
-           /**
-            * @type {Number}
-            */
+         /**
+          * 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;
+         },
 
-           this.otherPos = -1;
-           /**
-            * @type {Number}
-            */
+         /**
+          * 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);
+         },
+
+         /**
+          * 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);
+         },
 
-           this.outputContourId = -1;
-           this.isExteriorRing = true; // TODO: Looks unused, remove?
-         }
          /**
-          * @param  {Array.<Number>}  p
-          * @return {Boolean}
+          * 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);
+         },
 
+         /*
+          * 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());
 
-         _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;
-           }
-           /**
-            * @param  {Array.<Number>}  p
-            * @return {Boolean}
-            */
+           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);
+        */
 
-         }, {
-           key: "isAbove",
-           value: function isAbove(p) {
-             return !this.isBelow(p);
-           }
-           /**
-            * @return {Boolean}
-            */
+       Point.convert = function (a) {
+         if (a instanceof Point) {
+           return a;
+         }
 
-         }, {
-           key: "isVertical",
-           value: function isVertical() {
-             return this.point[0] === this.otherEvent.point[0];
-           }
-           /**
-            * Does event belong to result?
-            * @return {Boolean}
-            */
+         if (Array.isArray(a)) {
+           return new Point(a[0], a[1]);
+         }
 
-         }, {
-           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;
-           }
-         }]);
+         return a;
+       };
 
-         return SweepEvent;
-       }();
+       var vectortilefeature = VectorTileFeature$1;
 
-       function equals(p1, p2) {
-         if (p1[0] === p2[0]) {
-           if (p1[1] === p2[1]) {
-             return true;
-           } else {
-             return false;
-           }
-         }
+       function VectorTileFeature$1(pbf, end, extent, keys, values) {
+         // Public
+         this.properties = {};
+         this.extent = extent;
+         this.type = 0; // Private
 
-         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;
-       // };
+         this._pbf = pbf;
+         this._geometry = -1;
+         this._keys = keys;
+         this._values = values;
+         pbf.readFields(readFeature, this, end);
+       }
+
+       function readFeature(tag, feature, pbf) {
+         if (tag == 1) feature.id = pbf.readVarint();else if (tag == 2) readTag(pbf, feature);else if (tag == 3) feature.type = pbf.readVarint();else if (tag == 4) feature._geometry = pbf.pos;
+       }
 
-       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 readTag(pbf, feature) {
+         var end = pbf.readVarint() + pbf.pos;
 
-       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;
+         while (pbf.pos < end) {
+           var key = feature._keys[pbf.readVarint()],
+               value = feature._values[pbf.readVarint()];
 
-         if (fnow > enow === fnow > -enow) {
-           Q = enow;
-           enow = e[++eindex];
-         } else {
-           Q = fnow;
-           fnow = f[++findex];
+           feature.properties[key] = value;
          }
+       }
 
-         var hindex = 0;
+       VectorTileFeature$1.types = ['Unknown', 'Point', 'LineString', 'Polygon'];
 
-         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];
+       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;
+
+         while (pbf.pos < end) {
+           if (length <= 0) {
+             var cmdLen = pbf.readVarint();
+             cmd = cmdLen & 0x7;
+             length = cmdLen >> 3;
            }
 
-           Q = Qnew;
+           length--;
 
-           if (hh !== 0) {
-             h[hindex++] = hh;
-           }
+           if (cmd === 1 || cmd === 2) {
+             x += pbf.readSVarint();
+             y += pbf.readSVarint();
 
-           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];
-             } else {
-               Qnew = Q + fnow;
-               bvirt = Qnew - Q;
-               hh = Q - (Qnew - bvirt) + (fnow - bvirt);
-               fnow = f[++findex];
+             if (cmd === 1) {
+               // moveTo
+               if (line) lines.push(line);
+               line = [];
              }
 
-             Q = Qnew;
-
-             if (hh !== 0) {
-               h[hindex++] = hh;
+             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);
            }
          }
 
-         while (eindex < elen) {
-           Qnew = Q + enow;
-           bvirt = Qnew - Q;
-           hh = Q - (Qnew - bvirt) + (enow - bvirt);
-           enow = e[++eindex];
-           Q = Qnew;
+         if (line) lines.push(line);
+         return lines;
+       };
 
-           if (hh !== 0) {
-             h[hindex++] = hh;
-           }
-         }
+       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;
 
-         while (findex < flen) {
-           Qnew = Q + fnow;
-           bvirt = Qnew - Q;
-           hh = Q - (Qnew - bvirt) + (fnow - bvirt);
-           fnow = f[++findex];
-           Q = Qnew;
+         while (pbf.pos < end) {
+           if (length <= 0) {
+             var cmdLen = pbf.readVarint();
+             cmd = cmdLen & 0x7;
+             length = cmdLen >> 3;
+           }
 
-           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);
-       }
+           length--;
 
-       /**
-        * Signed area of the triangle (p0, p1, p2)
-        * @param  {Array.<Number>} p0
-        * @param  {Array.<Number>} p1
-        * @param  {Array.<Number>} p2
-        * @return {Number}
-        */
+           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);
+           }
+         }
 
-       function signedArea(p0, p1, p2) {
-         var res = orient2d(p0[0], p0[1], p1[0], p1[1], p2[0], p2[1]);
-         if (res > 0) return -1;
-         if (res < 0) return 1;
-         return 0;
-       }
+         return [x1, y1, x2, y2];
+       };
 
-       /**
-        * @param  {SweepEvent} e1
-        * @param  {SweepEvent} e2
-        * @return {Number}
-        */
+       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;
 
-       function compareEvents(e1, e2) {
-         var p1 = e1.point;
-         var p2 = e2.point; // Different x-coordinate
+         function project(line) {
+           for (var j = 0; j < line.length; j++) {
+             var p = line[j],
+                 y2 = 180 - (p.y + y0) * 360 / size;
+             line[j] = [(p.x + x0) * 360 / size - 180, 360 / Math.PI * Math.atan(Math.exp(y2 * Math.PI / 180)) - 90];
+           }
+         }
 
-         if (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
+         switch (this.type) {
+           case 1:
+             var points = [];
 
-         if (p1[1] !== p2[1]) return p1[1] > p2[1] ? 1 : -1;
-         return specialCases(e1, e2, p1);
-       }
-       /* eslint-disable no-unused-vars */
+             for (i = 0; i < coords.length; i++) {
+               points[i] = coords[i][0];
+             }
 
-       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
+             coords = points;
+             project(coords);
+             break;
 
-         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;
-         }
+           case 2:
+             for (i = 0; i < coords.length; i++) {
+               project(coords[i]);
+             }
 
-         return !e1.isSubject && e2.isSubject ? 1 : -1;
-       }
-       /* eslint-enable no-unused-vars */
+             break;
 
-       /**
-        * @param  {SweepEvent} se
-        * @param  {Array.<Number>} p
-        * @param  {Queue} queue
-        * @return {Queue}
-        */
+           case 3:
+             coords = classifyRings(coords);
 
-       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 */
+             for (i = 0; i < coords.length; i++) {
+               for (j = 0; j < coords[i].length; j++) {
+                 project(coords[i][j]);
+               }
+             }
 
-         if (equals(se.point, se.otherEvent.point)) {
-           console.warn('what is that, a collapsed segment?', se);
+             break;
          }
-         /* eslint-enable no-console */
 
+         if (coords.length === 1) {
+           coords = coords[0];
+         } else {
+           type = 'Multi' + type;
+         }
 
-         r.contourId = l.contourId = se.contourId; // avoid a rounding error. The left event would be processed after the right event
+         var result = {
+           type: "Feature",
+           geometry: {
+             type: type,
+             coordinates: coords
+           },
+           properties: this.properties
+         };
 
-         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) {}
+         if ('id' in this) {
+           result.id = this.id;
+         }
 
+         return result;
+       }; // classifies an array of rings into polygons with outer rings and holes
 
-         se.otherEvent.otherEvent = l;
-         se.otherEvent = r;
-         queue.push(l);
-         queue.push(r);
-         return queue;
-       }
 
-       //const EPS = 1e-9;
+       function classifyRings(rings) {
+         var len = rings.length;
+         if (len <= 1) return [rings];
+         var polygons = [],
+             polygon,
+             ccw;
 
-       /**
-        * 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
-        */
+         for (var i = 0; i < len; i++) {
+           var area = signedArea(rings[i]);
+           if (area === 0) continue;
+           if (ccw === undefined) ccw = area < 0;
 
+           if (ccw === area < 0) {
+             if (polygon) polygons.push(polygon);
+             polygon = [rings[i]];
+           } else {
+             polygon.push(rings[i]);
+           }
+         }
 
-       function dotProduct(a, b) {
-         return a[0] * b[0] + a[1] * b[1];
+         if (polygon) polygons.push(polygon);
+         return polygons;
        }
-       /**
-        * Finds the intersection (if any) between two line segments a and b, given the
-        * line segments' end points a1, a2 and b1, b2.
-        *
-        * This algorithm is based on Schneider and Eberly.
-        * http://www.cimec.org.ar/~ncalvo/Schneider_Eberly.pdf
-        * Page 244.
-        *
-        * @param {Array.<Number>} a1 point of first line
-        * @param {Array.<Number>} a2 point of first line
-        * @param {Array.<Number>} b1 point of second line
-        * @param {Array.<Number>} b2 point of second line
-        * @param {Boolean=}       noEndpointTouch whether to skip single touchpoints
-        *                                         (meaning connected segments) as
-        *                                         intersections
-        * @returns {Array.<Array.<Number>>|Null} If the lines intersect, the point of
-        * intersection. If they overlap, the two end points of the overlapping segment.
-        * Otherwise, null.
-        */
-
 
-       function intersection (a1, a2, b1, b2, noEndpointTouch) {
-         // The algorithm expects our lines in the form P + sd, where P is a point,
-         // s is on the interval [0, 1], and d is a vector.
-         // We are passed two points. P can be the first point of each pair. The
-         // vector, then, could be thought of as the distance (in x and y components)
-         // from the first point to the second point.
-         // So first, let's make our vectors:
-         var va = [a2[0] - a1[0], a2[1] - a1[1]];
-         var vb = [b2[0] - b1[0], b2[1] - b1[1]]; // We also define a function to convert back to regular point form:
-
-         /* eslint-disable arrow-body-style */
+       function signedArea(ring) {
+         var sum = 0;
 
-         function toPoint(p, s, d) {
-           return [p[0] + s * d[0], p[1] + s * d[1]];
+         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);
          }
-         /* eslint-enable arrow-body-style */
-         // The rest is pretty much a straight port of the algorithm.
-
-
-         var e = [b1[0] - a1[0], b1[1] - a1[1]];
-         var kross = crossProduct(va, vb);
-         var sqrKross = kross * kross;
-         var sqrLenA = dotProduct(va, va); //const sqrLenB  = dotProduct(vb, vb);
-         // Check for line intersection. This works because of the properties of the
-         // cross product -- specifically, two vectors are parallel if and only if the
-         // cross product is the 0 vector. The full calculation involves relative error
-         // to account for possible very small line segments. See Schneider & Eberly
-         // for details.
 
-         if (sqrKross > 0
-         /* EPS * sqrLenB * sqLenA */
-         ) {
-             // If they're not parallel, then (because these are line segments) they
-             // still might not actually intersect. This code checks that the
-             // intersection point of the lines is actually on both line segments.
-             var s = crossProduct(e, vb) / kross;
+         return sum;
+       }
 
-             if (s < 0 || s > 1) {
-               // not on line segment a
-               return null;
-             }
+       var vectortilelayer = VectorTileLayer$1;
 
-             var t = crossProduct(e, va) / kross;
+       function VectorTileLayer$1(pbf, end) {
+         // Public
+         this.version = 1;
+         this.name = null;
+         this.extent = 4096;
+         this.length = 0; // Private
 
-             if (t < 0 || t > 1) {
-               // not on line segment b
-               return null;
-             }
+         this._pbf = pbf;
+         this._keys = [];
+         this._values = [];
+         this._features = [];
+         pbf.readFields(readLayer, this, end);
+         this.length = this._features.length;
+       }
 
-             if (s === 0 || s === 1) {
-               // on an endpoint of line segment a
-               return noEndpointTouch ? null : [toPoint(a1, s, va)];
-             }
+       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));
+       }
 
-             if (t === 0 || t === 1) {
-               // on an endpoint of line segment b
-               return noEndpointTouch ? null : [toPoint(b1, t, vb)];
-             }
+       function readValueMessage(pbf) {
+         var value = null,
+             end = pbf.readVarint() + pbf.pos;
 
-             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);
+         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;
+         }
 
+         return value;
+       } // return feature `i` from this layer as a `VectorTileFeature`
 
-         kross = crossProduct(e, va);
-         sqrKross = kross * kross;
 
-         if (sqrKross > 0
-         /* EPS * sqLenB * sqLenE */
-         ) {
-             // Lines are just parallel, not the same. No overlap.
-             return null;
-           }
+       VectorTileLayer$1.prototype.feature = function (i) {
+         if (i < 0 || i >= this._features.length) throw new Error('feature index out of bounds');
+         this._pbf.pos = this._features[i];
 
-         var 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.
+         var end = this._pbf.readVarint() + this._pbf.pos;
 
-         if (smin <= 1 && smax >= 0) {
-           // overlap on an end point
-           if (smin === 1) {
-             return noEndpointTouch ? null : [toPoint(a1, smin > 0 ? smin : 0, va)];
-           }
+         return new vectortilefeature(this._pbf, end, this.extent, this._keys, this._values);
+       };
 
-           if (smax === 0) {
-             return noEndpointTouch ? null : [toPoint(a1, smax < 1 ? smax : 1, va)];
-           }
+       var vectortile = VectorTile$1;
 
-           if (noEndpointTouch && smin === 0 && smax === 1) return null; // There's overlap on a segment -- two points of intersection. Return both.
+       function VectorTile$1(pbf, end) {
+         this.layers = pbf.readFields(readTile, {}, end);
+       }
 
-           return [toPoint(a1, smin > 0 ? smin : 0, va), toPoint(a1, smax < 1 ? smax : 1, va)];
+       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;
        }
 
-       /**
-        * @param  {SweepEvent} se1
-        * @param  {SweepEvent} se2
-        * @param  {Queue}      queue
-        * @return {Number}
-        */
+       var VectorTile = vectortile;
+       var VectorTileFeature = vectortilefeature;
+       var VectorTileLayer = vectortilelayer;
+       var vectorTile = {
+         VectorTile: VectorTile,
+         VectorTileFeature: VectorTileFeature,
+         VectorTileLayer: VectorTileLayer
+       };
 
-       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;
-         }
+       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');
 
-         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
+       var _loadViewerPromise$2;
 
+       var _mlyActiveImage;
 
-         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
+       var _mlyCache;
 
+       var _mlyFallback = false;
 
-           if (!equals(se2.point, inter[0]) && !equals(se2.otherEvent.point, inter[0])) {
-             divideSegment(se2, inter[0], queue);
-           }
+       var _mlyHighlightedDetection;
 
-           return 1;
-         } // The line segments associated to se1 and se2 overlap
+       var _mlyShowFeatureDetections = false;
+       var _mlyShowSignDetections = false;
 
+       var _mlyViewer;
 
-         var events = [];
-         var leftCoincide = false;
-         var rightCoincide = false;
+       var _mlyViewerFilter = ['all']; // Load all data for the specified type from Mapillary vector tiles
 
-         if (equals(se1.point, se2.point)) {
-           leftCoincide = true; // linked
-         } else if (compareEvents(se1, se2) === 1) {
-           events.push(se2, se1);
-         } else {
-           events.push(se1, se2);
-         }
+       function 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 (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);
-         }
 
-         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;
+       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);
+           }
 
-           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);
+           cache.loaded[tileId] = true;
+           delete cache.inflight[tileId];
+           return response.arrayBuffer();
+         }).then(function (data) {
+           if (!data) {
+             throw new Error('No Data');
            }
 
-           return 2;
-         } // the line segments share the right endpoint
+           loadTileDataToCache(data, tile, which);
 
+           if (which === 'images') {
+             dispatch$4.call('loadedImages');
+           } else if (which === 'signs') {
+             dispatch$4.call('loadedSigns');
+           } else if (which === 'points') {
+             dispatch$4.call('loadedMapFeatures');
+           }
+         })["catch"](function () {
+           cache.loaded[tileId] = true;
+           delete cache.inflight[tileId];
+         });
+       } // Load the data from the vector tile into cache
 
-         if (rightCoincide) {
-           divideSegment(events[0], events[1].point, queue);
-           return 3;
-         } // no line segment includes totally the other one
 
+       function loadTileDataToCache(data, tile, which) {
+         var vectorTile = new VectorTile(new pbf(data));
+         var features, cache, layer, i, feature, loc, d;
 
-         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
+         if (vectorTile.layers.hasOwnProperty('image')) {
+           features = [];
+           cache = _mlyCache.images;
+           layer = vectorTile.layers.image;
 
+           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
+             });
+           }
 
-         divideSegment(events[0], events[1].point, queue);
-         divideSegment(events[3].otherEvent, events[2].point, queue);
-         return 3;
-       }
+           if (cache.rtree) {
+             cache.rtree.load(features);
+           }
+         }
 
-       /**
-        * @param  {SweepEvent} le1
-        * @param  {SweepEvent} le2
-        * @return {Number}
-        */
+         if (vectorTile.layers.hasOwnProperty('sequence')) {
+           features = [];
+           cache = _mlyCache.sequences;
+           layer = vectorTile.layers.sequence;
 
-       function compareSegments(le1, le2) {
-         if (le1 === le2) return 0; // Segments are not collinear
+           for (i = 0; i < layer.length; i++) {
+             feature = layer.feature(i).toGeoJSON(tile.xyz[0], tile.xyz[1], tile.xyz[2]);
 
-         if (signedArea(le1.point, le1.otherEvent.point, le2.point) !== 0 || signedArea(le1.point, le1.otherEvent.point, le2.otherEvent.point) !== 0) {
-           // If they share their left endpoint use the right endpoint to sort
-           if (equals(le1.point, le2.point)) return le1.isBelow(le2.otherEvent.point) ? -1 : 1; // Different left endpoint: use the left endpoint to sort
+             if (cache.lineString[feature.properties.id]) {
+               cache.lineString[feature.properties.id].push(feature);
+             } else {
+               cache.lineString[feature.properties.id] = [feature];
+             }
+           }
+         }
 
-           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 ?
+         if (vectorTile.layers.hasOwnProperty('point')) {
+           features = [];
+           cache = _mlyCache[which];
+           layer = vectorTile.layers.point;
 
-           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
+           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
+             });
+           }
 
-           return le1.isBelow(le2.point) ? -1 : 1;
+           if (cache.rtree) {
+             cache.rtree.load(features);
+           }
          }
 
-         if (le1.isSubject === le2.isSubject) {
-           // same polygon
-           var p1 = le1.point,
-               p2 = le2.point;
+         if (vectorTile.layers.hasOwnProperty('traffic_sign')) {
+           features = [];
+           cache = _mlyCache[which];
+           layer = vectorTile.layers.traffic_sign;
 
-           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;
-         }
+           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
+             });
+           }
 
-         return compareEvents(le1, le2) === 1 ? 1 : -1;
-       }
+           if (cache.rtree) {
+             cache.rtree.load(features);
+           }
+         }
+       } // Get data from the API
 
-       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;
 
-         while (eventQueue.length !== 0) {
-           var event = eventQueue.pop();
-           sortedEvents.push(event); // optimization by bboxes for intersection and difference goes here
+       function loadData(url) {
+         return fetch(url).then(function (response) {
+           if (!response.ok) {
+             throw new Error(response.status + ' ' + response.statusText);
+           }
 
-           if (operation === INTERSECTION && event.point[0] > rightbound || operation === DIFFERENCE && event.point[0] > sbbox[2]) {
-             break;
+           return response.json();
+         }).then(function (result) {
+           if (!result) {
+             return [];
            }
 
-           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);
+           return result.data || [];
+         });
+       } // Partition viewport into higher zoom tiles
 
-             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);
+       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 (prev && next) {
-               if (prev !== begin) prev = sweepLine.prev(prev);else prev = null;
-               next = sweepLine.next(next);
-               sweepLine.remove(event);
+         var tiler = utilTiler().zoomExtent([z2, z2]);
+         return tiler.getTiles(projection).map(function (tile) {
+           return tile.extent;
+         });
+       } // Return no more than `limit` results per partition.
 
-               if (next && prev) {
-                 possibleIntersection(prev.key, next.key, eventQueue);
-               }
-             }
-           }
-         }
 
-         return sortedEvents;
+       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;
+         }, []);
        }
 
-       var Contour = /*#__PURE__*/function () {
-         /**
-          * Contour
-          *
-          * @class {Contour}
-          */
-         function Contour() {
-           _classCallCheck(this, Contour);
-
-           this.points = [];
-           this.holeIds = [];
-           this.holeOf = null;
-           this.depth = null;
-         }
-
-         _createClass(Contour, [{
-           key: "isExterior",
-           value: function isExterior() {
-             return this.holeOf == null;
+       var serviceMapillary = {
+         // Initialize Mapillary
+         init: function init() {
+           if (!_mlyCache) {
+             this.reset();
            }
-         }]);
-
-         return Contour;
-       }();
 
-       /**
-        * @param  {Array.<SweepEvent>} sortedEvents
-        * @return {Array.<SweepEvent>}
-        */
-
-       function orderEvents(sortedEvents) {
-         var event, i, len, tmp;
-         var resultEvents = [];
+           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();
+             });
+           }
 
-         for (i = 0, len = sortedEvents.length; i < len; i++) {
-           event = sortedEvents[i];
+           _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 = [];
 
-           if (event.left && event.inResult || !event.left && event.otherEvent.inResult) {
-             resultEvents.push(event);
-           }
-         } // Due to overlapping edges the resultEvents array can be not wholly sorted
+           _mlyCache.images.rtree.search(bbox).forEach(function (d) {
+             if (d.data.sequence_id) {
+               sequenceIds[d.data.sequence_id] = true;
+             }
+           });
 
+           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
 
-         var sorted = false;
+           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;
 
-         while (!sorted) {
-           sorted = true;
+             function loaded() {
+               loadedCount += 1; // wait until both files are loaded
 
-           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 (loadedCount === 2) resolve();
              }
-           }
-         }
-
-         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
 
+             var head = select('head'); // load mapillary-viewercss
 
-         for (i = 0, len = resultEvents.length; i < len; i++) {
-           event = resultEvents[i];
+             head.selectAll('#ideditor-mapillary-viewercss').data([0]).enter().append('link').attr('id', 'ideditor-mapillary-viewercss').attr('rel', 'stylesheet').attr('crossorigin', 'anonymous').attr('href', context.asset(viewercss)).on('load.serviceMapillary', loaded).on('error.serviceMapillary', function () {
+               reject();
+             }); // load mapillary-viewerjs
 
-           if (!event.left) {
-             tmp = event.otherPos;
-             event.otherPos = event.otherEvent.otherPos;
-             event.otherEvent.otherPos = tmp;
+             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();
            }
-         }
-
-         return resultEvents;
-       }
-       /**
-        * @param  {Number} pos
-        * @param  {Array.<SweepEvent>} resultEvents
-        * @param  {Object>}    processed
-        * @return {Number}
-        */
+         },
+         // Show map feature detections in image viewer
+         showFeatureDetections: function showFeatureDetections(value) {
+           _mlyShowFeatureDetections = value;
 
+           if (!_mlyShowFeatureDetections && !_mlyShowSignDetections) {
+             this.resetTags();
+           }
+         },
+         // Show traffic sign detections in image viewer
+         showSignDetections: function showSignDetections(value) {
+           _mlyShowSignDetections = value;
 
-       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;
+           if (!_mlyShowFeatureDetections && !_mlyShowSignDetections) {
+             this.resetTags();
+           }
+         },
+         // Apply filter to image viewer
+         filterViewer: function filterViewer(context) {
+           var showsPano = context.photos().showsPanoramic();
+           var showsFlat = context.photos().showsFlat();
+           var fromDate = context.photos().fromDate();
+           var toDate = context.photos().toDate();
+           var filter = ['all'];
+           if (!showsPano) filter.push(['!=', 'cameraType', 'spherical']);
+           if (!showsFlat && showsPano) filter.push(['==', 'pano', true]);
 
-         while (newPos < length && p1[0] === p[0] && p1[1] === p[1]) {
-           if (!processed[newPos]) {
-             return newPos;
-           } else {
-             newPos++;
+           if (fromDate) {
+             filter.push(['>=', 'capturedAt', new Date(fromDate).getTime()]);
            }
 
-           p1 = resultEvents[newPos].point;
-         }
+           if (toDate) {
+             filter.push(['>=', 'capturedAt', new Date(toDate).getTime()]);
+           }
 
-         newPos = pos - 1;
+           if (_mlyViewer) {
+             _mlyViewer.setFilter(filter);
+           }
 
-         while (processed[newPos] && newPos > origPos) {
-           newPos--;
-         }
+           _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();
 
-         return newPos;
-       }
+           if (isHidden && _mlyViewer) {
+             wrap.selectAll('.photo-wrapper:not(.mly-wrapper)').classed('hide', true);
+             wrap.selectAll('.photo-wrapper.mly-wrapper').classed('hide', false);
 
-       function initializeContourFromContext(event, contours, contourId) {
-         var contour = new Contour();
+             _mlyViewer.resize();
+           }
 
-         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".
+           return this;
+         },
+         // Hide the image viewer and resets map markers
+         hideViewer: function hideViewer(context) {
+           _mlyActiveImage = null;
 
-           var lowerContourId = prevInResult.outputContourId;
-           var lowerResultTransition = prevInResult.resultTransition;
+           if (!_mlyFallback && _mlyViewer) {
+             _mlyViewer.getComponent('sequence').stop();
+           }
 
-           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];
+           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 (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;
+             if (imageId) {
+               hash.photo = 'mapillary/' + imageId;
              } 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;
+               delete hash.photo;
              }
-           } 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;
-         }
-
-         return contour;
-       }
-       /**
-        * @param  {Array.<SweepEvent>} sortedEvents
-        * @return {Array.<*>} polygons
-        */
 
+             window.location.replace('#' + utilQsString(hash, true));
+           }
+         },
+         // Highlight the detection in the viewer that is related to the clicked map feature
+         highlightDetection: function highlightDetection(detection) {
+           if (detection) {
+             _mlyHighlightedDetection = detection.id;
+           }
 
-       function connectEdges(sortedEvents) {
-         var i, len;
-         var resultEvents = orderEvents(sortedEvents); // "false"-filled array
+           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
 
-         var processed = {};
-         var contours = [];
+           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
 
-         var _loop = function _loop() {
-           if (processed[i]) {
-             return "continue";
+             };
            }
 
-           var contourId = contours.length;
-           var contour = initializeContourFromContext(resultEvents[i], contours, contourId); // Helper function that combines marking an event as processed with assigning its output contour ID
-
-           var markAsProcessed = function markAsProcessed(pos) {
-             processed[pos] = true;
-             resultEvents[pos].outputContourId = contourId;
-           };
+           _mlyViewer = new mapillary.Viewer(opts);
 
-           var pos = i;
-           var origPos = i;
-           var initial = resultEvents[i].point;
-           contour.points.push(initial);
-           /* eslint no-constant-condition: "off" */
+           _mlyViewer.on('image', imageChanged);
 
-           while (true) {
-             markAsProcessed(pos);
-             pos = resultEvents[pos].otherPos;
-             markAsProcessed(pos);
-             contour.points.push(resultEvents[pos].point);
-             pos = nextPos(pos, resultEvents, processed, origPos);
+           _mlyViewer.on('bearing', bearingChanged);
 
-             if (pos == origPos) {
-               break;
-             }
-           }
+           if (_mlyViewerFilter) {
+             _mlyViewer.setFilter(_mlyViewerFilter);
+           } // Register viewer resize handler
 
-           contours.push(contour);
-         };
 
-         for (i = 0, len = resultEvents.length; i < len; i++) {
-           var _ret = _loop();
+           context.ui().photoviewer.on('resize.mapillary', function () {
+             if (_mlyViewer) _mlyViewer.resize();
+           }); // imageChanged: called after the viewer has changed images and is ready.
 
-           if (_ret === "continue") continue;
-         }
+           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);
 
-         return contours;
-       }
+             if (_mlyShowFeatureDetections || _mlyShowSignDetections) {
+               that.updateDetections(image.id, "".concat(apiUrl, "/").concat(image.id, "/detections?access_token=").concat(accessToken, "&fields=id,image,geometry,value"));
+             }
 
-       var tinyqueue = TinyQueue;
-       var _default$1 = TinyQueue;
+             dispatch$4.call('imageChanged');
+           } // bearingChanged: called when the bearing changes in the image viewer.
 
-       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;
 
-         if (this.length > 0) {
-           for (var i = (this.length >> 1) - 1; i >= 0; i--) {
-             this._down(i);
+           function bearingChanged(e) {
+             dispatch$4.call('bearingChanged', undefined, e);
            }
-         }
-       }
-
-       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);
          },
-         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);
+         // 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
+             });
            }
 
-           this.data.pop();
-           return top;
+           return this;
          },
-         peek: function peek() {
-           return this.data[0];
+         // Return the currently displayed image
+         getActiveImage: function getActiveImage() {
+           return _mlyActiveImage;
          },
-         _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;
+         // 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"));
          },
-         _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;
-         }
-       };
-       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
-           }
-
-           e1.contourId = e2.contourId = depth;
-
-           if (!isExteriorRing) {
-             e1.isExteriorRing = false;
-             e2.isExteriorRing = false;
-           }
-
-           if (compareEvents(e1, e2) > 0) {
-             e2.left = true;
+         // 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 {
-             e1.left = true;
+             _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;
 
-           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.
+           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] = [];
+                 }
 
-           Q.push(e1);
-           Q.push(e2);
-         }
-       }
+                 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
 
-       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];
+           function showDetections(detections) {
+             var tagComponent = _mlyViewer.getComponent('tag');
 
-           for (j = 0, jj = polygonSet.length; j < jj; j++) {
-             isExteriorRing = j === 0;
-             if (isExteriorRing) contourId++;
-             processPolygon(polygonSet[j], true, contourId, eventQueue, sbbox, isExteriorRing);
-           }
-         }
+             detections.forEach(function (data) {
+               var tag = makeTag(data);
 
-         for (i = 0, ii = clipping.length; i < ii; i++) {
-           polygonSet = clipping[i];
+               if (tag) {
+                 tagComponent.add([tag]);
+               }
+             });
+           } // Create a Mapillary JS tag object
 
-           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);
-           }
-         }
 
-         return eventQueue;
-       }
+           function makeTag(data) {
+             var valueParts = data.value.split('--');
+             if (!valueParts.length) return;
+             var tag;
+             var text;
+             var color = 0xffffff;
 
-       var EMPTY = [];
+             if (_mlyHighlightedDetection === data.id) {
+               color = 0xffff00;
+               text = valueParts[1];
 
-       function trivialOperation(subject, clipping, operation) {
-         var result = null;
+               if (text === 'flat' || text === 'discrete' || text === 'sign') {
+                 text = valueParts[2];
+               }
 
-         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;
-           }
-         }
+               text = text.replace(/-/g, ' ');
+               text = text.charAt(0).toUpperCase() + text.slice(1);
+               _mlyHighlightedDetection = null;
+             }
 
-         return result;
-       }
+             var decodedGeometry = window.atob(data.geometry);
+             var uintArray = new Uint8Array(decodedGeometry.length);
 
-       function compareBBoxes(subject, clipping, sbbox, cbbox, operation) {
-         var result = null;
+             for (var i = 0; i < decodedGeometry.length; i++) {
+               uintArray[i] = decodedGeometry.charCodeAt(i);
+             }
 
-         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);
+             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 result;
-       }
-
-       function _boolean(subject, clipping, operation) {
-         if (typeof subject[0][0][0] === 'number') {
-           subject = [subject];
-         }
-
-         if (typeof clipping[0][0][0] === 'number') {
-           clipping = [clipping];
-         }
-
-         var trivial = trivialOperation(subject, clipping, operation);
+       function validationIssue(attrs) {
+         this.type = attrs.type; // required - name of rule that created the issue (e.g. 'missing_tag')
 
-         if (trivial) {
-           return trivial === EMPTY ? null : trivial;
-         }
+         this.subtype = attrs.subtype; // optional - category of the issue within the type (e.g. 'relation_type' under 'missing_tag')
 
-         var sbbox = [Infinity, Infinity, -Infinity, -Infinity];
-         var cbbox = [Infinity, Infinity, -Infinity, -Infinity]; // console.time('fill queue');
+         this.severity = attrs.severity; // required - 'warning' or 'error'
 
-         var eventQueue = fillQueue(subject, clipping, sbbox, cbbox, operation); //console.timeEnd('fill queue');
+         this.message = attrs.message; // required - function returning localized string
 
-         trivial = compareBBoxes(subject, clipping, sbbox, cbbox, operation);
+         this.reference = attrs.reference; // optional - function(selection) to render reference information
 
-         if (trivial) {
-           return trivial === EMPTY ? null : trivial;
-         } // console.time('subdivide edges');
+         this.entityIds = attrs.entityIds; // optional - array of IDs of entities involved in the issue
 
+         this.loc = attrs.loc; // optional - [lon, lat] to zoom in on to see the issue
 
-         var sortedEvents = subdivide(eventQueue, subject, clipping, sbbox, cbbox, operation); //console.timeEnd('subdivide edges');
-         // console.time('connect vertices');
+         this.data = attrs.data; // optional - object containing extra data for the fixes
 
-         var contours = connectEdges(sortedEvents); //console.timeEnd('connect vertices');
-         // Convert contours to polygons
+         this.dynamicFixes = attrs.dynamicFixes; // optional - function(context) returning fixes
 
-         var polygons = [];
+         this.hash = attrs.hash; // optional - string to further differentiate the issue
 
-         for (var i = 0; i < contours.length; i++) {
-           var contour = contours[i];
+         this.id = generateID.apply(this); // generated - see below
 
-           if (contour.isExterior()) {
-             // The exterior ring goes first
-             var rings = [contour.points]; // Followed by holes if any
+         this.autoFix = null; // generated - if autofix exists, will be set below
+         // A unique, deterministic string hash.
+         // Issues with identical id values are considered identical.
 
-             for (var j = 0; j < contour.holeIds.length; j++) {
-               var holeId = contour.holeIds[j];
-               rings.push(contours[holeId].points);
-             }
+         function generateID() {
+           var parts = [this.type];
 
-             polygons.push(rings);
+           if (this.hash) {
+             // subclasses can pass in their own differentiator
+             parts.push(this.hash);
            }
-         }
-
-         return polygons;
-       }
-
-       function union(subject, clipping) {
-         return _boolean(subject, clipping, UNION);
-       }
-
-       /*! ieee754. BSD-3-Clause License. Feross Aboukhadijeh <https://feross.org/opensource> */
-       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;
-
-         for (; nBits > 0; e = e * 256 + buffer[offset + i], i += d, nBits -= 8) {}
-
-         m = e & (1 << -nBits) - 1;
-         e >>= -nBits;
-         nBits += mLen;
-
-         for (; nBits > 0; m = m * 256 + buffer[offset + i], i += d, nBits -= 8) {}
-
-         if (e === 0) {
-           e = 1 - eBias;
-         } else if (e === eMax) {
-           return m ? NaN : (s ? -1 : 1) * Infinity;
-         } else {
-           m = m + Math.pow(2, mLen);
-           e = e - eBias;
-         }
-
-         return (s ? -1 : 1) * m * Math.pow(2, e - mLen);
-       };
 
-       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);
+           if (this.subtype) {
+             parts.push(this.subtype);
+           } // include the entities this issue is for
+           // (sort them so the id is deterministic)
 
-         if (isNaN(value) || value === Infinity) {
-           m = isNaN(value) ? 1 : 0;
-           e = eMax;
-         } else {
-           e = Math.floor(Math.log(value) / Math.LN2);
 
-           if (value * (c = Math.pow(2, -e)) < 1) {
-             e--;
-             c *= 2;
+           if (this.entityIds) {
+             var entityKeys = this.entityIds.slice().sort();
+             parts.push.apply(parts, entityKeys);
            }
 
-           if (e + eBias >= 1) {
-             value += rt / c;
-           } else {
-             value += rt * Math.pow(2, 1 - eBias);
-           }
+           return parts.join(':');
+         }
 
-           if (value * c >= 2) {
-             e++;
-             c /= 2;
+         this.extent = function (resolver) {
+           if (this.loc) {
+             return geoExtent(this.loc);
            }
 
-           if (e + eBias >= eMax) {
-             m = 0;
-             e = eMax;
-           } else if (e + eBias >= 1) {
-             m = (value * c - 1) * Math.pow(2, mLen);
-             e = e + eBias;
-           } else {
-             m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen);
-             e = 0;
+           if (this.entityIds && this.entityIds.length) {
+             return this.entityIds.reduce(function (extent, entityId) {
+               return extent.extend(resolver.entity(entityId).extent(resolver));
+             }, geoExtent());
            }
-         }
 
-         for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}
-
-         e = e << mLen | m;
-         eLen += mLen;
+           return null;
+         };
 
-         for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}
+         this.fixes = function (context) {
+           var fixes = this.dynamicFixes ? this.dynamicFixes(context) : [];
+           var issue = this;
 
-         buffer[offset + i - d] |= s * 128;
-       };
+           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);
+               }
+             }));
+           }
 
-       var ieee754$1 = {
-         read: read$6,
-         write: write$6
-       };
+           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
 
-       var pbf = Pbf;
+             fix.issue = issue;
 
-       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 (fix.autoArgs) {
+               issue.autoFix = fix;
+             }
+           });
+           return fixes;
+         };
        }
+       function validationIssueFix(attrs) {
+         this.title = attrs.title; // Required
 
-       Pbf.Varint = 0; // varint: int32, int64, uint32, uint64, sint32, sint64, bool, enum
-
-       Pbf.Fixed64 = 1; // 64-bit: double, fixed64, sfixed64
+         this.onClick = attrs.onClick; // Optional - the function to run to apply the fix
 
-       Pbf.Bytes = 2; // length-delimited: string, bytes, embedded messages, packed repeated fields
+         this.disabledReason = attrs.disabledReason; // Optional - a string explaining why the fix is unavailable, if any
 
-       Pbf.Fixed32 = 5; // 32-bit: float, fixed32, sfixed32
+         this.icon = attrs.icon; // Optional - shows 'iD-icon-wrench' if not set
 
-       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)
+         this.entityIds = attrs.entityIds || []; // Optional - used for hover-higlighting.
 
-       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;
+         this.autoArgs = attrs.autoArgs; // Optional - pass [actions, annotation] arglist if this fix can automatically run
 
-           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);
-           }
+         this.issue = null; // Generated link - added by validationIssue
+       }
 
-           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;
+       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];
 
-           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
+             var expression = _positiveRegex[tagKey].join('|');
 
+             var regex = new RegExp(expression);
+             return function (tags) {
+               return regex.test(tags[tagKey]);
+             };
+           },
+           negativeRegex: function negativeRegex(_negativeRegex) {
+             var tagKey = Object.keys(_negativeRegex)[0];
 
-           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 expression = _negativeRegex[tagKey].join('|');
 
-           while (this.pos < end) {
-             arr.push(this.readVarint(isSigned));
+             var regex = new RegExp(expression);
+             return function (tags) {
+               return !regex.test(tags[tagKey]);
+             };
            }
+         };
+       };
 
-           return arr;
-         },
-         readPackedSVarint: function readPackedSVarint(arr) {
-           if (this.type !== Pbf.Bytes) return arr.push(this.readSVarint());
-           var end = readPackedEnd(this);
-           arr = arr || [];
-
-           while (this.pos < end) {
-             arr.push(this.readSVarint());
+       var buildLineKeys = function buildLineKeys() {
+         return {
+           highway: {
+             rest_area: true,
+             services: true
+           },
+           railway: {
+             roundhouse: true,
+             station: true,
+             traverser: true,
+             turntable: true,
+             wash: true
            }
+         };
+       };
 
-           return arr;
+       var serviceMapRules = {
+         init: function init() {
+           this._ruleChecks = buildRuleChecks();
+           this._validationRules = [];
+           this._areaKeys = osmAreaKeys;
+           this._lineKeys = buildLineKeys();
          },
-         readPackedBoolean: function readPackedBoolean(arr) {
-           if (this.type !== Pbf.Bytes) return arr.push(this.readBoolean());
-           var end = readPackedEnd(this);
-           arr = arr || [];
-
-           while (this.pos < end) {
-             arr.push(this.readBoolean());
-           }
+         // 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]));
+             }
 
-           return arr;
+             return rules;
+           }, []);
          },
-         readPackedFloat: function readPackedFloat(arr) {
-           if (this.type !== Pbf.Bytes) return arr.push(this.readFloat());
-           var end = readPackedEnd(this);
-           arr = arr || [];
+         // 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, '');
+             });
+           };
 
-           while (this.pos < end) {
-             arr.push(this.readFloat());
-           }
+           var tagMap = Object.keys(selector).reduce(function (expectedTags, key) {
+             var values;
+             var isRegex = /regex/gi.test(key);
+             var isEqual = /equals/gi.test(key);
 
-           return arr;
-         },
-         readPackedDouble: function readPackedDouble(arr) {
-           if (this.type !== Pbf.Bytes) return arr.push(this.readDouble());
-           var end = readPackedEnd(this);
-           arr = arr || [];
+             if (isRegex || isEqual) {
+               Object.keys(selector[key]).forEach(function (selectorKey) {
+                 values = isEqual ? [selector[key][selectorKey]] : getRegexValues(selector[key][selectorKey]);
 
-           while (this.pos < end) {
-             arr.push(this.readDouble());
-           }
+                 if (expectedTags.hasOwnProperty(selectorKey)) {
+                   values = values.concat(expectedTags[selectorKey]);
+                 }
 
-           return arr;
-         },
-         readPackedFixed32: function readPackedFixed32(arr) {
-           if (this.type !== Pbf.Bytes) return arr.push(this.readFixed32());
-           var end = readPackedEnd(this);
-           arr = arr || [];
+                 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]];
 
-           while (this.pos < end) {
-             arr.push(this.readFixed32());
-           }
+               if (expectedTags.hasOwnProperty(tagKey)) {
+                 values = values.concat(expectedTags[tagKey]);
+               }
 
-           return arr;
+               expectedTags[tagKey] = values;
+             }
+
+             return expectedTags;
+           }, {});
+           return tagMap;
          },
-         readPackedSFixed32: function readPackedSFixed32(arr) {
-           if (this.type !== Pbf.Bytes) return arr.push(this.readSFixed32());
-           var end = readPackedEnd(this);
-           arr = arr || [];
+         // inspired by osmWay#isArea()
+         inferGeometry: function inferGeometry(tagMap) {
+           var _lineKeys = this._lineKeys;
+           var _areaKeys = this._areaKeys;
 
-           while (this.pos < end) {
-             arr.push(this.readSFixed32());
-           }
+           var keyValueDoesNotImplyArea = function keyValueDoesNotImplyArea(key) {
+             return utilArrayIntersection(tagMap[key], Object.keys(_areaKeys[key])).length > 0;
+           };
 
-           return arr;
-         },
-         readPackedFixed64: function readPackedFixed64(arr) {
-           if (this.type !== Pbf.Bytes) return arr.push(this.readFixed64());
-           var end = readPackedEnd(this);
-           arr = arr || [];
+           var keyValueImpliesLine = function keyValueImpliesLine(key) {
+             return utilArrayIntersection(tagMap[key], Object.keys(_lineKeys[key])).length > 0;
+           };
 
-           while (this.pos < end) {
-             arr.push(this.readFixed64());
+           if (tagMap.hasOwnProperty('area')) {
+             if (tagMap.area.indexOf('yes') > -1) {
+               return 'area';
+             }
+
+             if (tagMap.area.indexOf('no') > -1) {
+               return 'line';
+             }
            }
 
-           return arr;
-         },
-         readPackedSFixed64: function readPackedSFixed64(arr) {
-           if (this.type !== Pbf.Bytes) return arr.push(this.readSFixed64());
-           var end = readPackedEnd(this);
-           arr = arr || [];
+           for (var key in tagMap) {
+             if (key in _areaKeys && !keyValueDoesNotImplyArea(key)) {
+               return 'area';
+             }
 
-           while (this.pos < end) {
-             arr.push(this.readSFixed64());
+             if (key in _lineKeys && keyValueImpliesLine(key)) {
+               return 'area';
+             }
            }
 
-           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);
+           return 'line';
          },
-         realloc: function realloc(min) {
-           var length = this.length || 16;
-
-           while (length < this.pos + min) {
-             length *= 2;
-           }
+         // adds from mapcss-parse selector check...
+         addRule: function addRule(selector) {
+           var rule = {
+             // checks relevant to mapcss-selector
+             checks: this.filterRuleChecks(selector),
+             // true if all conditions for a tag error are true..
+             matches: function matches(entity) {
+               return this.checks.every(function (check) {
+                 return check(entity.tags);
+               });
+             },
+             // borrowed from Way#isArea()
+             inferredGeometry: this.inferGeometry(this.buildTagMap(selector), this._areaKeys),
+             geometryMatches: function geometryMatches(entity, graph) {
+               if (entity.type === 'node' || entity.type === 'relation') {
+                 return selector.geometry === entity.type;
+               } else if (entity.type === 'way') {
+                 return this.inferredGeometry === entity.geometry(graph);
+               }
+             },
+             // when geometries match and tag matches are present, return a warning...
+             findIssues: function findIssues(entity, graph, issues) {
+               if (this.geometryMatches(entity, graph) && this.matches(entity)) {
+                 var severity = Object.keys(selector).indexOf('error') > -1 ? 'error' : 'warning';
+                 var _message = selector[severity];
+                 issues.push(new validationIssue({
+                   type: 'maprules',
+                   severity: severity,
+                   message: function message() {
+                     return _message;
+                   },
+                   entityIds: [entity.id]
+                 }));
+               }
+             }
+           };
 
-           if (length !== this.length) {
-             var buf = new Uint8Array(length);
-             buf.set(this.buf);
-             this.buf = buf;
-             this.length = length;
-           }
+           this._validationRules.push(rule);
          },
-         finish: function finish() {
-           this.length = this.pos;
-           this.pos = 0;
-           return this.buf.subarray(0, this.length);
+         clearRules: function clearRules() {
+           this._validationRules = [];
          },
-         writeFixed32: function writeFixed32(val) {
-           this.realloc(4);
-           writeInt32(this.buf, val, this.pos);
-           this.pos += 4;
+         // returns validationRules...
+         validationRules: function validationRules() {
+           return this._validationRules;
          },
-         writeSFixed32: function writeSFixed32(val) {
-           this.realloc(4);
-           writeInt32(this.buf, val, this.pos);
-           this.pos += 4;
+         // returns ruleChecks
+         ruleChecks: function ruleChecks() {
+           return this._ruleChecks;
+         }
+       };
+
+       var apibase$2 = 'https://nominatim.openstreetmap.org/';
+       var _inflight$2 = {};
+
+       var _nominatimCache;
+
+       var serviceNominatim = {
+         init: function init() {
+           _inflight$2 = {};
+           _nominatimCache = new RBush();
          },
-         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;
+         reset: function reset() {
+           Object.values(_inflight$2).forEach(function (controller) {
+             controller.abort();
+           });
+           _inflight$2 = {};
+           _nominatimCache = new RBush();
          },
-         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;
+         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);
+             }
+           });
          },
-         writeVarint: function writeVarint(val) {
-           val = +val || 0;
+         reverse: function reverse(loc, callback) {
+           var cached = _nominatimCache.search({
+             minX: loc[0],
+             minY: loc[1],
+             maxX: loc[0],
+             maxY: loc[1]
+           });
 
-           if (val > 0xfffffff || val < 0) {
-             writeBigVarint(val, this);
+           if (cached.length > 0) {
+             if (callback) callback(null, cached[0].data);
              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
+           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];
 
-           var startPos = this.pos; // write the string directly to the buffer and see how much was written
+             if (result && result.error) {
+               throw new Error(result.error);
+             }
 
-           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 extent = geoExtent(loc).padByMeters(200);
 
-           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);
+             _nominatimCache.insert(Object.assign(extent.bbox(), {
+               data: result
+             }));
 
-           for (var i = 0; i < len; i++) {
-             this.buf[this.pos++] = buffer[i];
-           }
+             if (callback) callback(null, result);
+           })["catch"](function (err) {
+             delete _inflight$2[url];
+             if (err.name === 'AbortError') return;
+             if (callback) callback(err.message);
+           });
          },
-         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
+         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];
 
-           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
+             if (result && result.error) {
+               throw new Error(result.error);
+             }
 
-           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));
+             if (callback) callback(null, result);
+           })["catch"](function (err) {
+             delete _inflight$2[url];
+             if (err.name === 'AbortError') return;
+             if (callback) callback(err.message);
+           });
          }
        };
 
-       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');
-       }
+       // for punction see https://stackoverflow.com/a/21224179
 
-       function readPackedEnd(pbf) {
-         return pbf.type === Pbf.Bytes ? pbf.readVarint() + pbf.pos : pbf.pos + 1;
+       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 toNum(low, high, isSigned) {
-         if (isSigned) {
-           return high * 0x100000000 + (low >>> 0);
-         }
+       var matchGroups$1 = {adult_gaming_centre:["amenity/casino","amenity/gambling","leisure/adult_gaming_centre"],beauty:["shop/beauty","shop/hairdresser_supply"],bed:["shop/bed","shop/furniture"],beverages:["shop/alcohol","shop/beer","shop/beverages","shop/wine"],camping:["leisure/park","tourism/camp_site","tourism/caravan_site"],car_parts:["shop/car_parts","shop/car_repair","shop/tires","shop/tyres"],clinic:["amenity/clinic","amenity/doctors","healthcare/clinic","healthcare/dialysis"],confectionery:["shop/candy","shop/chocolate","shop/confectionery"],convenience:["shop/beauty","shop/chemist","shop/convenience","shop/cosmetics","shop/grocery","shop/newsagent"],coworking:["amenity/coworking_space","office/coworking","office/coworking_space"],dentist:["amenity/dentist","amenity/doctors","healthcare/dentist"],electronics:["office/telecommunication","shop/computer","shop/electronics","shop/hifi","shop/mobile","shop/mobile_phone","shop/telecommunication"],fabric:["shop/fabric","shop/haberdashery","shop/sewing"],fashion:["shop/accessories","shop/bag","shop/botique","shop/clothes","shop/department_store","shop/fashion","shop/fashion_accessories","shop/sports","shop/shoes"],financial:["amenity/bank","office/accountant","office/financial","office/financial_advisor","office/tax_advisor","shop/tax"],fitness:["leisure/fitness_centre","leisure/fitness_center","leisure/sports_centre","leisure/sports_center"],food:["amenity/pub","amenity/bar","amenity/cafe","amenity/fast_food","amenity/ice_cream","amenity/restaurant","shop/bakery","shop/ice_cream","shop/pastry","shop/tea","shop/coffee"],fuel:["amenity/fuel","shop/gas","shop/convenience;gas","shop/gas;convenience"],gift:["shop/gift","shop/card","shop/cards","shop/stationery"],hardware:["shop/bathroom_furnishing","shop/carpet","shop/diy","shop/doityourself","shop/doors","shop/electrical","shop/flooring","shop/hardware","shop/hardware_store","shop/power_tools","shop/tool_hire","shop/tools","shop/trade"],health_food:["shop/health","shop/health_food","shop/herbalist","shop/nutrition_supplements"],hobby:["shop/electronics","shop/hobby","shop/books","shop/games","shop/collector","shop/toys","shop/model","shop/video_games","shop/anime"],hospital:["amenity/doctors","amenity/hospital","healthcare/hospital"],houseware:["shop/houseware","shop/interior_decoration"],lifeboat_station:["amenity/lifeboat_station","emergency/lifeboat_station","emergency/marine_rescue"],lodging:["tourism/hotel","tourism/motel"],money_transfer:["amenity/money_transfer","shop/money_transfer"],office_supplies:["shop/office_supplies","shop/stationary","shop/stationery"],outdoor:["shop/outdoor","shop/sports"],pharmacy:["amenity/doctors","amenity/pharmacy","healthcare/pharmacy"],playground:["amenity/theme_park","leisure/amusement_arcade","leisure/playground"],rental:["amenity/bicycle_rental","amenity/boat_rental","amenity/car_rental","amenity/truck_rental","amenity/vehicle_rental","shop/rental"],school:["amenity/childcare","amenity/college","amenity/kindergarten","amenity/language_school","amenity/prep_school","amenity/school","amenity/university"],supermarket:["shop/food","shop/frozen_food","shop/greengrocer","shop/grocery","shop/supermarket","shop/wholesale"],variety_store:["shop/variety_store","shop/discount","shop/convenience"],vending:["amenity/vending_machine","shop/vending_machine"],storage:["shop/storage_units","shop/storage_rental"],weight_loss:["amenity/doctors","amenity/weight_clinic","healthcare/counselling","leisure/fitness_centre","office/therapist","shop/beauty","shop/diet","shop/food","shop/health_food","shop/herbalist","shop/nutrition","shop/nutrition_supplements","shop/weight_loss"],wholesale:["shop/wholesale","shop/supermarket","shop/department_store"]};
+       var matchGroupsJSON = {
+       matchGroups: matchGroups$1
+       };
+
+       var genericWords = ["^(barn|bazaa?r|bench|bou?tique|building|casa|church)$","^(baseball|basketball|football|soccer|softball|tennis(halle)?)\\s?(field|court)?$","^(club|green|out|ware)\\s?house$","^(driveway|el árbol|fountain|golf|government|graveyard)$","^(hofladen|librairie|magazine?|maison)$","^(mobile home|skate)?\\s?park$","^(n\\s?\\/?\\s?a|name|no\\s?name|none|null|temporary|test|unknown)$","^(obuwie|pond|pool|sale|shops?|sklep|stores?)$","^\\?+$","^tattoo( studio)?$","^windmill$","^церковная( лавка)?$"];
+       var genericWordsJSON = {
+       genericWords: genericWords
+       };
 
-         return (high >>> 0) * 0x100000000 + (low >>> 0);
-       }
+       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
+       };
 
-       function writeBigVarint(val, pbf) {
-         var low, high;
+       var matchGroups = matchGroupsJSON.matchGroups;
+       var trees = treesJSON.trees;
+       var Matcher = /*#__PURE__*/function () {
+         //
+         // `constructor`
+         // initialize the genericWords regexes
+         function Matcher() {
+           var _this = this;
 
-         if (val >= 0) {
-           low = val % 0x100000000 | 0;
-           high = val / 0x100000000 | 0;
-         } else {
-           low = ~(-val % 0x100000000);
-           high = ~(-val / 0x100000000);
+           _classCallCheck$1(this, Matcher);
 
-           if (low ^ 0xffffffff) {
-             low = low + 1 | 0;
-           } else {
-             low = 0;
-             high = high + 1 | 0;
-           }
-         }
+           // 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 (val >= 0x10000000000000000 || val < -0x10000000000000000) {
-           throw new Error('Given varint doesn\'t fit into 10 bytes');
-         }
+           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 {…},
+           //   …
+           // }
 
-         pbf.realloc(10);
-         writeBigVarintLow(low, high, pbf);
-         writeBigVarintHigh(high, pbf);
-       }
+           this.locationSets = undefined; // The `locationIndex` is an instance of which-polygon spatial index for the locationSets.
 
-       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;
-       }
+           this.locationIndex = undefined; // Array of match conflict pairs (currently unused)
 
-       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;
-       }
+           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: [ {}, {}, … ] },
+         //    …
+         // }
+         //
 
-       function makeRoomForExtraLength(startPos, len, pbf) {
-         var extraLen = len <= 0x3fff ? 1 : len <= 0x1fffff ? 2 : len <= 0xfffffff ? 3 : Math.floor(Math.log(len) / (Math.LN2 * 7)); // if 1 byte isn't enough for encoding message length, shift the data to the right
 
-         pbf.realloc(extraLen);
+         _createClass$1(Matcher, [{
+           key: "buildMatchIndex",
+           value: function buildMatchIndex(data) {
+             var that = this;
+             if (that.matchIndex) return; // it was built already
+
+             that.matchIndex = new Map();
+             Object.keys(data).forEach(function (tkv) {
+               var category = data[tkv];
+               var parts = tkv.split('/', 3); // tkv = "tree/key/value"
+
+               var t = parts[0];
+               var k = parts[1];
+               var v = parts[2];
+               var thiskv = "".concat(k, "/").concat(v);
+               var tree = trees[t];
+               var branch = that.matchIndex.get(thiskv);
+
+               if (!branch) {
+                 branch = {
+                   primary: new Map(),
+                   alternate: new Map(),
+                   excludeGeneric: new Map(),
+                   excludeNamed: new Map()
+                 };
+                 that.matchIndex.set(thiskv, branch);
+               } // ADD EXCLUSIONS
 
-         for (var i = pbf.pos - 1; i >= startPos; i--) {
-           pbf.buf[i + extraLen] = pbf.buf[i];
-         }
-       }
 
-       function _writePackedVarint(arr, pbf) {
-         for (var i = 0; i < arr.length; i++) {
-           pbf.writeVarint(arr[i]);
-         }
-       }
+               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
 
-       function _writePackedSVarint(arr, pbf) {
-         for (var i = 0; i < arr.length; i++) {
-           pbf.writeSVarint(arr[i]);
-         }
-       }
+               var items = category.items;
+               if (!Array.isArray(items) || !items.length) return; // Primary name patterns, match tags to take first
+               //  e.g. `name`, `name:ru`
 
-       function _writePackedFloat(arr, pbf) {
-         for (var i = 0; i < arr.length; i++) {
-           pbf.writeFloat(arr[i]);
-         }
-       }
+               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 _writePackedDouble(arr, pbf) {
-         for (var i = 0; i < arr.length; i++) {
-           pbf.writeDouble(arr[i]);
-         }
-       }
+               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..
 
-       function _writePackedBoolean(arr, pbf) {
-         for (var i = 0; i < arr.length; i++) {
-           pbf.writeBoolean(arr[i]);
-         }
-       }
+               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`
 
-       function _writePackedFixed(arr, pbf) {
-         for (var i = 0; i < arr.length; i++) {
-           pbf.writeFixed32(arr[i]);
-         }
-       }
+               var skipGenericKV = skipGenericKVMatches(t, k, v); // We will collect the generic KV pairs anyway (for the purpose of filtering them out of matchTags)
 
-       function _writePackedSFixed(arr, pbf) {
-         for (var i = 0; i < arr.length; i++) {
-           pbf.writeSFixed32(arr[i]);
-         }
-       }
+               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`)
 
-       function _writePackedFixed2(arr, pbf) {
-         for (var i = 0; i < arr.length; i++) {
-           pbf.writeFixed64(arr[i]);
-         }
-       }
+               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
 
-       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
+                   matchGroupKV.add(otherkv);
+                   var otherk = otherkv.split('/', 2)[0]; // we might pick up a `shop/yes`
 
+                   genericKV.add("".concat(otherk, "/yes"));
+                 });
+               }); // For each item, insert all [key, value, name] combinations into the match index
 
-       function readUInt32(buf, pos) {
-         return (buf[pos] | buf[pos + 1] << 8 | buf[pos + 2] << 16) + buf[pos + 3] * 0x1000000;
-       }
+               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`)
 
-       function writeInt32(buf, val, pos) {
-         buf[pos] = val;
-         buf[pos + 1] = val >>> 8;
-         buf[pos + 2] = val >>> 16;
-         buf[pos + 3] = val >>> 24;
-       }
+                 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..
 
-       function readInt32(buf, pos) {
-         return (buf[pos] | buf[pos + 1] << 8 | buf[pos + 2] << 16) + (buf[pos + 3] << 24);
-       }
 
-       function readUtf8(buf, pos, end) {
-         var str = '';
-         var i = pos;
+                 var kvTags = ["".concat(thiskv)].concat(item.matchTags || []);
 
-         while (i < end) {
-           var b0 = buf[i];
-           var c = null; // codepoint
+                 if (!skipGenericKV) {
+                   kvTags = kvTags.concat(Array.from(genericKV)); // #3454 - match some generic tags
+                 } // Index all the namelike tag values
 
-           var bytesPerSequence = b0 > 0xEF ? 4 : b0 > 0xDF ? 3 : b0 > 0xBF ? 2 : 1;
-           if (i + bytesPerSequence > end) break;
-           var b1, b2, b3;
 
-           if (bytesPerSequence === 1) {
-             if (b0 < 0x80) {
-               c = b0;
-             }
-           } else if (bytesPerSequence === 2) {
-             b1 = buf[i + 1];
+                 Object.keys(item.tags).forEach(function (osmkey) {
+                   if (notName.test(osmkey)) return; // osmkey is not a namelike tag, skip
 
-             if ((b1 & 0xC0) === 0x80) {
-               c = (b0 & 0x1F) << 0x6 | b1 & 0x3F;
+                   var osmvalue = item.tags[osmkey];
+                   if (!osmvalue || excludeRegexes.some(function (regex) {
+                     return regex.test(osmvalue);
+                   })) return; // osmvalue missing or excluded
 
-               if (c <= 0x7F) {
-                 c = null;
+                   if (primaryName.test(osmkey)) {
+                     kvTags.forEach(function (kv) {
+                       return insertName('primary', kv, simplify$1(osmvalue), item.id);
+                     });
+                   } else if (alternateName.test(osmkey)) {
+                     kvTags.forEach(function (kv) {
+                       return insertName('alternate', kv, simplify$1(osmvalue), item.id);
+                     });
+                   }
+                 }); // Index `matchNames` after indexing all other names..
+
+                 var keepMatchNames = new Set();
+                 (item.matchNames || []).forEach(function (matchName) {
+                   // If this matchname isn't already indexed, add it to the alternate index
+                   var nsimple = simplify$1(matchName);
+                   kvTags.forEach(function (kv) {
+                     var branch = that.matchIndex.get(kv);
+                     var primaryLeaf = branch && branch.primary.get(nsimple);
+                     var alternateLeaf = branch && branch.alternate.get(nsimple);
+                     var inPrimary = primaryLeaf && primaryLeaf.has(item.id);
+                     var inAlternate = alternateLeaf && alternateLeaf.has(item.id);
+
+                     if (!inPrimary && !inAlternate) {
+                       insertName('alternate', kv, nsimple, item.id);
+                       keepMatchNames.add(matchName);
+                     }
+                   });
+                 }); // Automatically remove redundant `matchNames` - #3417
+                 // (i.e. This name got indexed some other way, so it doesn't need to be in `item.matchNames`)
+
+                 if (keepMatchNames.size) {
+                   item.matchNames = Array.from(keepMatchNames);
+                 } else {
+                   delete item.matchNames;
+                 }
+               }); // each item
+             }); // each tkv
+             // Insert this item into the matchIndex
+
+             function insertName(which, kv, nsimple, itemID) {
+               if (!nsimple) return;
+               var branch = that.matchIndex.get(kv);
+
+               if (!branch) {
+                 branch = {
+                   primary: new Map(),
+                   alternate: new Map(),
+                   excludeGeneric: new Map(),
+                   excludeNamed: new Map()
+                 };
+                 that.matchIndex.set(kv, branch);
                }
-             }
-           } 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 leaf = branch[which].get(nsimple);
 
-               if (c <= 0x7FF || c >= 0xD800 && c <= 0xDFFF) {
-                 c = null;
+               if (!leaf) {
+                 leaf = new Set();
+                 branch[which].set(nsimple, leaf);
                }
-             }
-           } 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;
+               leaf.add(itemID); // insert
+             } // For certain categories we do not want to match generic KV pairs like `building/yes` or `amenity/yes`
 
-               if (c <= 0xFFFF || c >= 0x110000) {
-                 c = null;
-               }
+
+             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 (c === null) {
-             c = 0xFFFD;
-             bytesPerSequence = 1;
-           } else if (c > 0xFFFF) {
-             c -= 0x10000;
-             str += String.fromCharCode(c >>> 10 & 0x3FF | 0xD800);
-             c = 0xDC00 | c & 0x3FF;
-           }
+         }, {
+           key: "buildLocationIndex",
+           value: function buildLocationIndex(data, loco) {
+             var that = this;
+             if (that.locationIndex) return; // it was built already
 
-           str += String.fromCharCode(c);
-           i += bytesPerSequence;
-         }
+             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 str;
-       }
+                 var resolved;
 
-       function readUtf8TextDecoder(buf, pos, end) {
-         return utf8TextDecoder.decode(buf.subarray(pos, end));
-       }
+                 try {
+                   resolved = loco.resolveLocationSet(item.locationSet); // resolve a feature for this locationSet
+                 } catch (err) {
+                   console.warn("buildLocationIndex: ".concat(err.message)); // couldn't resolve
+                 }
 
-       function writeUtf8(buf, str, pos) {
-         for (var i = 0, c, lead; i < str.length; i++) {
-           c = str.charCodeAt(i); // code point
+                 if (!resolved || !resolved.id) return;
+                 that.itemLocation.set(item.id, resolved.id); // link it to the item
 
-           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 (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..
 
-               continue;
+                 var feature = _cloneDeep(resolved.feature);
+
+                 feature.id = resolved.id; // Important: always use the locationSet `id` (`+[Q30]`), not the feature `id` (`Q30`)
+
+                 feature.properties.id = resolved.id;
+
+                 if (!feature.geometry.coordinates.length || !feature.properties.area) {
+                   console.warn("buildLocationIndex: locationSet ".concat(resolved.id, " for ").concat(item.id, " resolves to an empty feature:"));
+                   console.warn(JSON.stringify(feature));
+                   return;
+                 }
+
+                 that.locationSets.set(resolved.id, feature);
+               });
+             });
+             that.locationIndex = whichPolygon_1({
+               type: 'FeatureCollection',
+               features: _toConsumableArray(that.locationSets.values())
+             });
+
+             function _cloneDeep(obj) {
+               return JSON.parse(JSON.stringify(obj));
              }
-           } else if (lead) {
-             buf[pos++] = 0xEF;
-             buf[pos++] = 0xBF;
-             buf[pos++] = 0xBD;
-             lead = null;
-           }
+           } //
+           // `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`
+           //
+           //
 
-           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;
-               }
+         }, {
+           key: "match",
+           value: function match(k, v, n, loc) {
+             var that = this;
 
-               buf[pos++] = c >> 0x6 & 0x3F | 0x80;
+             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.
+
+
+             var matchLocations;
+
+             if (Array.isArray(loc) && that.locationIndex) {
+               // which-polygon query returns an array of GeoJSON properties, pass true to return all results
+               matchLocations = that.locationIndex([loc[0], loc[1], loc[0], loc[1]], true);
              }
 
-             buf[pos++] = c & 0x3F | 0x80;
-           }
-         }
+             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 pos;
-       }
+                 for (var i = 0; i < matchGroup.length; i++) {
+                   var otherkv = matchGroup[i];
+                   if (otherkv === kv) continue; // skip self
 
-       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);
-        */
+                   didMatch = tryMatch(which, otherkv);
+                   if (didMatch) return;
+                 }
+               } // If finished 'exclude' pass and still haven't matched anything, try the global `genericWords.json` patterns
 
-       function Point(x, y) {
-         this.x = x;
-         this.y = y;
-       }
 
-       Point.prototype = {
-         /**
-          * Clone this point, returning a new point that can be modified
-          * without affecting the old one.
-          * @return {Point} the clone
-          */
-         clone: function clone() {
-           return new Point(this.x, this.y);
-         },
+               if (which === 'exclude') {
+                 var regex = _toConsumableArray(that.genericWords.values()).find(function (regex) {
+                   return regex.test(n);
+                 });
 
-         /**
-          * 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);
-         },
+                 if (regex) {
+                   results.push({
+                     match: 'excludeGeneric',
+                     pattern: String(regex)
+                   }); // note no `branch`, no `kv`
 
-         /**
-          * 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);
-         },
+                   return;
+                 }
+               }
+             }
 
-         /**
-          * 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);
-         },
+             function tryMatch(which, kv) {
+               var branch = that.matchIndex.get(kv);
+               if (!branch) return;
 
-         /**
-          * 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 (which === 'exclude') {
+                 // Test name `n` against named and generic exclude patterns
+                 var regex = _toConsumableArray(branch.excludeNamed.values()).find(function (regex) {
+                   return regex.test(n);
+                 });
 
-         /**
-          * 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);
-         },
+                 if (regex) {
+                   results.push({
+                     match: 'excludeNamed',
+                     pattern: String(regex),
+                     kv: kv
+                   });
+                   return;
+                 }
 
-         /**
-          * 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);
-         },
+                 regex = _toConsumableArray(branch.excludeGeneric.values()).find(function (regex) {
+                   return regex.test(n);
+                 });
 
-         /**
-          * 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);
-         },
+                 if (regex) {
+                   results.push({
+                     match: 'excludeGeneric',
+                     pattern: String(regex),
+                     kv: kv
+                   });
+                   return;
+                 }
 
-         /**
-          * 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);
-         },
+                 return;
+               }
 
-         /**
-          * 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);
-         },
+               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)
 
-         /**
-          * 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();
-         },
+               var hits = Array.from(leaf).map(function (itemID) {
+                 var area = Infinity;
 
-         /**
-          * 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();
-         },
+                 if (that.itemLocation && that.locationSets) {
+                   var location = that.locationSets.get(that.itemLocation.get(itemID));
+                   area = location && location.properties.area || Infinity;
+                 }
 
-         /**
-          * 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();
-         },
+                 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 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 (matchLocations) {
+                 hits = hits.filter(isValidLocation);
+                 sortFn = byAreaAscending;
+               }
 
-         /**
-          * 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;
-         },
+               if (!hits.length) return; // push results
 
-         /**
-          * 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));
-         },
+               hits.sort(sortFn).forEach(function (hit) {
+                 if (seen.has(hit.itemID)) return;
+                 seen.add(hit.itemID);
+                 results.push(hit);
+               });
+               return true;
+
+               function isValidLocation(hit) {
+                 if (!that.itemLocation) return true;
+                 return matchLocations.find(function (props) {
+                   return props.id === that.itemLocation.get(hit.itemID);
+                 });
+               } // Sort smaller (more local) locations first.
+
+
+               function byAreaAscending(hitA, hitB) {
+                 return hitA.area - hitB.area;
+               } // Sort larger (more worldwide) locations first.
+
+
+               function byAreaDescending(hitA, hitB) {
+                 return hitB.area - hitA.area;
+               }
+             }
+           } //
+           // `getWarnings()`
+           // Return any warnings discovered when buiding the index.
+           // (currently this does nothing)
+           //
+
+         }, {
+           key: "getWarnings",
+           value: function getWarnings() {
+             return this.warnings;
+           }
+         }]);
+
+         return Matcher;
+       }();
+
+       /**
+        * 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);
 
-         /**
-          * 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;
-         },
+         return value != null && (type == 'object' || type == 'function');
+       }
 
-         /**
-          * 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);
-         },
+       /** Detect free variable `global` from Node.js. */
+       var freeGlobal = (typeof global === "undefined" ? "undefined" : _typeof(global)) == 'object' && global && global.Object === Object && global;
 
-         /**
-          * 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);
-         },
+       /** Detect free variable `self`. */
 
-         /**
-          * 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 freeSelf = (typeof self === "undefined" ? "undefined" : _typeof(self)) == 'object' && self && self.Object === Object && self;
+       /** Used as a reference to the global object. */
 
-         /*
-          * 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 root = freeGlobal || freeSelf || Function('return this')();
 
-           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.
+        * 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
-        * // this
-        * var point = Point.convert([0, 1]);
-        * // is equivalent to
-        * var point = new Point(0, 1);
+        *
+        * _.defer(function(stamp) {
+        *   console.log(_.now() - stamp);
+        * }, _.now());
+        * // => Logs the number of milliseconds it took for the deferred invocation.
         */
 
-       Point.convert = function (a) {
-         if (a instanceof Point) {
-           return a;
-         }
-
-         if (Array.isArray(a)) {
-           return new Point(a[0], a[1]);
-         }
-
-         return a;
+       var now = function now() {
+         return root.Date.now();
        };
 
-       var vectortilefeature = VectorTileFeature;
+       /** 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 VectorTileFeature(pbf, end, extent, keys, values) {
-         // Public
-         this.properties = {};
-         this.extent = extent;
-         this.type = 0; // Private
+       function trimmedEndIndex(string) {
+         var index = string.length;
 
-         this._pbf = pbf;
-         this._geometry = -1;
-         this._keys = keys;
-         this._values = values;
-         pbf.readFields(readFeature, this, end);
-       }
+         while (index-- && reWhitespace.test(string.charAt(index))) {}
 
-       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;
+         return index;
        }
 
-       function readTag(pbf, feature) {
-         var end = pbf.readVarint() + pbf.pos;
+       /** Used to match leading whitespace. */
 
-         while (pbf.pos < end) {
-           var key = feature._keys[pbf.readVarint()],
-               value = feature._values[pbf.readVarint()];
+       var reTrimStart = /^\s+/;
+       /**
+        * The base implementation of `_.trim`.
+        *
+        * @private
+        * @param {string} string The string to trim.
+        * @returns {string} Returns the trimmed string.
+        */
 
-           feature.properties[key] = value;
-         }
+       function baseTrim(string) {
+         return string ? string.slice(0, trimmedEndIndex(string) + 1).replace(reTrimStart, '') : string;
        }
 
-       VectorTileFeature.types = ['Unknown', 'Point', 'LineString', 'Polygon'];
+       /** Built-in value references. */
 
-       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;
+       var _Symbol = root.Symbol;
 
-         while (pbf.pos < end) {
-           if (length <= 0) {
-             var cmdLen = pbf.readVarint();
-             cmd = cmdLen & 0x7;
-             length = cmdLen >> 3;
-           }
+       /** Used for built-in method references. */
 
-           length--;
+       var objectProto$1 = Object.prototype;
+       /** Used to check objects for own properties. */
 
-           if (cmd === 1 || cmd === 2) {
-             x += pbf.readSVarint();
-             y += pbf.readSVarint();
+       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.
+        */
 
-             if (cmd === 1) {
-               // moveTo
-               if (line) lines.push(line);
-               line = [];
-             }
+       var nativeObjectToString$1 = objectProto$1.toString;
+       /** Built-in value references. */
 
-             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
-             }
+       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 {
-             throw new Error('unknown command ' + cmd);
+             delete value[symToStringTag$1];
            }
          }
 
-         if (line) lines.push(line);
-         return lines;
-       };
+         return result;
+       }
 
-       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;
+       /** 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.
+        */
 
-         while (pbf.pos < end) {
-           if (length <= 0) {
-             var cmdLen = pbf.readVarint();
-             cmd = cmdLen & 0x7;
-             length = cmdLen >> 3;
-           }
+       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.
+        */
 
-           length--;
+       function objectToString(value) {
+         return nativeObjectToString.call(value);
+       }
 
-           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);
-           }
-         }
+       /** `Object#toString` result references. */
 
-         return [x1, y1, x2, y2];
-       };
+       var nullTag = '[object Null]',
+           undefinedTag = '[object Undefined]';
+       /** Built-in value references. */
 
-       VectorTileFeature.prototype.toGeoJSON = function (x, y, z) {
-         var size = this.extent * Math.pow(2, z),
-             x0 = this.extent * x,
-             y0 = this.extent * y,
-             coords = this.loadGeometry(),
-             type = VectorTileFeature.types[this.type],
-             i,
-             j;
+       var 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 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];
-           }
+       function baseGetTag(value) {
+         if (value == null) {
+           return value === undefined ? undefinedTag : nullTag;
          }
 
-         switch (this.type) {
-           case 1:
-             var points = [];
+         return symToStringTag && symToStringTag in Object(value) ? getRawTag(value) : objectToString(value);
+       }
 
-             for (i = 0; i < coords.length; i++) {
-               points[i] = coords[i][0];
-             }
+       /**
+        * 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';
+       }
 
-             coords = points;
-             project(coords);
-             break;
+       /** `Object#toString` result references. */
 
-           case 2:
-             for (i = 0; i < coords.length; i++) {
-               project(coords[i]);
-             }
+       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
+        */
 
-             break;
+       function isSymbol(value) {
+         return _typeof(value) == 'symbol' || isObjectLike(value) && baseGetTag(value) == symbolTag;
+       }
 
-           case 3:
-             coords = classifyRings(coords);
+       /** Used as references for various `Number` constants. */
 
-             for (i = 0; i < coords.length; i++) {
-               for (j = 0; j < coords[i].length; j++) {
-                 project(coords[i][j]);
-               }
-             }
+       var NAN = 0 / 0;
+       /** Used to detect bad signed hexadecimal string values. */
 
-             break;
+       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 (coords.length === 1) {
-           coords = coords[0];
-         } else {
-           type = 'Multi' + type;
+         if (isSymbol(value)) {
+           return NAN;
          }
 
-         var result = {
-           type: "Feature",
-           geometry: {
-             type: type,
-             coordinates: coords
-           },
-           properties: this.properties
-         };
+         if (isObject$2(value)) {
+           var other = typeof value.valueOf == 'function' ? value.valueOf() : value;
+           value = isObject$2(other) ? other + '' : other;
+         }
 
-         if ('id' in this) {
-           result.id = this.id;
+         if (typeof value != 'string') {
+           return value === 0 ? value : +value;
          }
 
-         return result;
-       }; // classifies an array of rings into polygons with outer rings and holes
+         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;
+       }
 
+       /** Error message constants. */
 
-       function classifyRings(rings) {
-         var len = rings.length;
-         if (len <= 1) return [rings];
-         var polygons = [],
-             polygon,
-             ccw;
+       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);
+        */
 
-         for (var i = 0; i < len; i++) {
-           var area = signedArea$1(rings[i]);
-           if (area === 0) continue;
-           if (ccw === undefined) ccw = area < 0;
+       function debounce(func, wait, options) {
+         var lastArgs,
+             lastThis,
+             maxWait,
+             result,
+             timerId,
+             lastCallTime,
+             lastInvokeTime = 0,
+             leading = false,
+             maxing = false,
+             trailing = true;
 
-           if (ccw === area < 0) {
-             if (polygon) polygons.push(polygon);
-             polygon = [rings[i]];
-           } else {
-             polygon.push(rings[i]);
-           }
+         if (typeof func != 'function') {
+           throw new TypeError(FUNC_ERROR_TEXT$1);
          }
 
-         if (polygon) polygons.push(polygon);
-         return polygons;
-       }
-
-       function signedArea$1(ring) {
-         var sum = 0;
+         wait = toNumber(wait) || 0;
 
-         for (var i = 0, len = ring.length, j = len - 1, p1, p2; i < len; j = i++) {
-           p1 = ring[i];
-           p2 = ring[j];
-           sum += (p2.x - p1.x) * (p1.y + p2.y);
+         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;
          }
 
-         return sum;
-       }
-
-       var vectortilelayer = VectorTileLayer;
-
-       function VectorTileLayer(pbf, end) {
-         // Public
-         this.version = 1;
-         this.name = null;
-         this.extent = 4096;
-         this.length = 0; // Private
-
-         this._pbf = pbf;
-         this._keys = [];
-         this._values = [];
-         this._features = [];
-         pbf.readFields(readLayer, this, end);
-         this.length = this._features.length;
-       }
+         function invokeFunc(time) {
+           var args = lastArgs,
+               thisArg = lastThis;
+           lastArgs = lastThis = undefined;
+           lastInvokeTime = time;
+           result = func.apply(thisArg, args);
+           return result;
+         }
 
-       function readLayer(tag, layer, pbf) {
-         if (tag === 15) layer.version = pbf.readVarint();else if (tag === 1) layer.name = pbf.readString();else if (tag === 5) layer.extent = pbf.readVarint();else if (tag === 2) layer._features.push(pbf.pos);else if (tag === 3) layer._keys.push(pbf.readString());else if (tag === 4) layer._values.push(readValueMessage(pbf));
-       }
+         function leadingEdge(time) {
+           // Reset any `maxWait` timer.
+           lastInvokeTime = time; // Start the timer for the trailing edge.
 
-       function readValueMessage(pbf) {
-         var value = null,
-             end = pbf.readVarint() + pbf.pos;
+           timerId = setTimeout(timerExpired, wait); // Invoke the leading edge.
 
-         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;
+           return leading ? invokeFunc(time) : result;
          }
 
-         return value;
-       } // return feature `i` from this layer as a `VectorTileFeature`
-
+         function remainingWait(time) {
+           var timeSinceLastCall = time - lastCallTime,
+               timeSinceLastInvoke = time - lastInvokeTime,
+               timeWaiting = wait - timeSinceLastCall;
+           return maxing ? nativeMin(timeWaiting, maxWait - timeSinceLastInvoke) : timeWaiting;
+         }
 
-       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];
+         function shouldInvoke(time) {
+           var timeSinceLastCall = time - lastCallTime,
+               timeSinceLastInvoke = time - lastInvokeTime; // Either this is the first call, activity has stopped and we're at the
+           // trailing edge, the system time has gone backwards and we're treating
+           // it as the trailing edge, or we've hit the `maxWait` limit.
 
-         var end = this._pbf.readVarint() + this._pbf.pos;
+           return lastCallTime === undefined || timeSinceLastCall >= wait || timeSinceLastCall < 0 || maxing && timeSinceLastInvoke >= maxWait;
+         }
 
-         return new vectortilefeature(this._pbf, end, this.extent, this._keys, this._values);
-       };
+         function timerExpired() {
+           var time = now();
 
-       var vectortile = VectorTile;
+           if (shouldInvoke(time)) {
+             return trailingEdge(time);
+           } // Restart the timer.
 
-       function VectorTile(pbf, end) {
-         this.layers = pbf.readFields(readTile, {}, end);
-       }
 
-       function readTile(tag, layers, pbf) {
-         if (tag === 3) {
-           var layer = new vectortilelayer(pbf, pbf.readVarint() + pbf.pos);
-           if (layer.length) layers[layer.name] = layer;
+           timerId = setTimeout(timerExpired, remainingWait(time));
          }
-       }
 
-       var VectorTile$1 = vectortile;
-       var VectorTileFeature$1 = vectortilefeature;
-       var VectorTileLayer$1 = vectortilelayer;
-       var vectorTile = {
-         VectorTile: VectorTile$1,
-         VectorTileFeature: VectorTileFeature$1,
-         VectorTileLayer: VectorTileLayer$1
-       };
+         function trailingEdge(time) {
+           timerId = undefined; // Only invoke if we have `lastArgs` which means `func` has been
+           // debounced at least once.
 
-       var tiler$7 = utilTiler().tileSize(512).margin(1);
-       var dispatch$8 = dispatch('loadedData');
+           if (trailing && lastArgs) {
+             return invokeFunc(time);
+           }
 
-       var _vtCache;
+           lastArgs = lastThis = undefined;
+           return result;
+         }
 
-       function abortRequest$7(controller) {
-         controller.abort();
-       }
+         function cancel() {
+           if (timerId !== undefined) {
+             clearTimeout(timerId);
+           }
 
-       function vtToGeoJSON(data, tile, mergeCache) {
-         var vectorTile$1 = new vectorTile.VectorTile(new pbf(data));
-         var layers = Object.keys(vectorTile$1.layers);
+           lastInvokeTime = 0;
+           lastArgs = lastCallTime = lastThis = timerId = undefined;
+         }
 
-         if (!Array.isArray(layers)) {
-           layers = [layers];
+         function flush() {
+           return timerId === undefined ? result : trailingEdge(now());
          }
 
-         var features = [];
-         layers.forEach(function (layerID) {
-           var layer = vectorTile$1.layers[layerID];
+         function debounced() {
+           var time = now(),
+               isInvoking = shouldInvoke(time);
+           lastArgs = arguments;
+           lastThis = this;
+           lastCallTime = time;
 
-           if (layer) {
-             for (var i = 0; i < layer.length; i++) {
-               var feature = layer.feature(i).toGeoJSON(tile.xyz[0], tile.xyz[1], tile.xyz[2]);
-               var geometry = feature.geometry; // Treat all Polygons as MultiPolygons
+           if (isInvoking) {
+             if (timerId === undefined) {
+               return leadingEdge(lastCallTime);
+             }
 
-               if (geometry.type === 'Polygon') {
-                 geometry.type = 'MultiPolygon';
-                 geometry.coordinates = [geometry.coordinates];
-               }
+             if (maxing) {
+               // Handle invocations in a tight loop.
+               clearTimeout(timerId);
+               timerId = setTimeout(timerExpired, wait);
+               return invokeFunc(lastCallTime);
+             }
+           }
 
-               var isClipped = false; // Clip to tile bounds
+           if (timerId === undefined) {
+             timerId = setTimeout(timerExpired, wait);
+           }
 
-               if (geometry.type === 'MultiPolygon') {
-                 var featureClip = turf_bboxClip(feature, tile.extent.rectangle());
+           return result;
+         }
 
-                 if (!fastDeepEqual(feature.geometry, featureClip.geometry)) {
-                   // feature = featureClip;
-                   isClipped = true;
-                 }
+         debounced.cancel = cancel;
+         debounced.flush = flush;
+         return debounced;
+       }
 
-                 if (!feature.geometry.coordinates.length) continue; // not actually on this tile
+       /*
+           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 (!feature.geometry.coordinates[0].length) continue; // not actually on this tile
-               } // Generate some unique IDs and add some metadata
+       function coreDifference(base, head) {
+         var _changes = {};
+         var _didChange = {}; // 'addition', 'deletion', 'geometry', 'properties'
 
+         var _diff = {};
 
-               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 checkEntityID(id) {
+           var h = head.entities[id];
+           var b = base.entities[id];
+           if (h === b) return;
+           if (_changes[id]) return;
 
-               if (isClipped && geometry.type === 'MultiPolygon') {
-                 var merged = mergeCache[propertyhash];
+           if (!h && b) {
+             _changes[id] = {
+               base: b,
+               head: h
+             };
+             _didChange.deletion = true;
+             return;
+           }
 
-                 if (merged && merged.length) {
-                   var other = merged[0];
-                   var coords = union(feature.geometry.coordinates, other.geometry.coordinates);
+           if (h && !b) {
+             _changes[id] = {
+               base: b,
+               head: h
+             };
+             _didChange.addition = true;
+             return;
+           }
 
-                   if (!coords || !coords.length) {
-                     continue; // something failed in martinez union
-                   }
+           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;
+             }
 
-                   merged.push(feature);
+             if (h.loc && b.loc && !geoVecEqual(h.loc, b.loc)) {
+               _changes[id] = {
+                 base: b,
+                 head: h
+               };
+               _didChange.geometry = true;
+             }
 
-                   for (var j = 0; j < merged.length; j++) {
-                     // all these features get...
-                     merged[j].geometry.coordinates = coords; // same coords
+             if (h.nodes && b.nodes && !fastDeepEqual(h.nodes, b.nodes)) {
+               _changes[id] = {
+                 base: b,
+                 head: h
+               };
+               _didChange.geometry = true;
+             }
 
-                     merged[j].__featurehash__ = featurehash; // same hash, so deduplication works
-                   }
-                 } else {
-                   mergeCache[propertyhash] = [feature];
-                 }
-               }
+             if (h.tags && b.tags && !fastDeepEqual(h.tags, b.tags)) {
+               _changes[id] = {
+                 base: b,
+                 head: h
+               };
+               _didChange.properties = true;
              }
            }
-         });
-         return features;
-       }
+         }
 
-       function loadTile(source, tile) {
-         if (source.loaded[tile.id] || source.inflight[tile.id]) return;
-         var url = source.template.replace('{x}', tile.xyz[0]).replace('{y}', tile.xyz[1]) // TMS-flipped y coordinate
-         .replace(/\{[t-]y\}/, Math.pow(2, tile.xyz[2]) - tile.xyz[1] - 1).replace(/\{z(oom)?\}/, tile.xyz[2]).replace(/\{switch:([^}]+)\}/, function (s, r) {
-           var subdomains = r.split(',');
-           return subdomains[(tile.xyz[0] + tile.xyz[1]) % subdomains.length];
-         });
-         var controller = new AbortController();
-         source.inflight[tile.id] = controller;
-         fetch(url, {
-           signal: controller.signal
-         }).then(function (response) {
-           if (!response.ok) {
-             throw new Error(response.status + ' ' + response.statusText);
-           }
+         function 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)));
 
-           source.loaded[tile.id] = [];
-           delete source.inflight[tile.id];
-           return response.arrayBuffer();
-         }).then(function (data) {
-           if (!data) {
-             throw new Error('No Data');
+           for (var i = 0; i < ids.length; i++) {
+             checkEntityID(ids[i]);
            }
+         }
 
-           var z = tile.xyz[2];
-
-           if (!source.canMerge[z]) {
-             source.canMerge[z] = {}; // initialize mergeCache
-           }
+         load();
 
-           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];
-         });
-       }
+         _diff.length = function length() {
+           return Object.keys(_changes).length;
+         };
 
-       var serviceVectorTile = {
-         init: function init() {
-           if (!_vtCache) {
-             this.reset();
-           }
+         _diff.changes = function changes() {
+           return _changes;
+         };
 
-           this.event = utilRebind(this, dispatch$8, 'on');
-         },
-         reset: function reset() {
-           for (var sourceID in _vtCache) {
-             var source = _vtCache[sourceID];
+         _diff.didChange = _didChange; // pass true to include affected relation members
 
-             if (source && source.inflight) {
-               Object.values(source.inflight).forEach(abortRequest$7);
+         _diff.extantIDs = function extantIDs(includeRelMembers) {
+           var result = new Set();
+           Object.keys(_changes).forEach(function (id) {
+             if (_changes[id].head) {
+               result.add(id);
              }
-           }
-
-           _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 = [];
-
-           for (var i = 0; i < tiles.length; i++) {
-             var features = source.loaded[tiles[i].id];
-             if (!features || !features.length) continue;
 
-             for (var j = 0; j < features.length; j++) {
-               var feature = features[j];
-               var hash = feature.__featurehash__;
-               if (seen[hash]) continue;
-               seen[hash] = true; // return a shallow copy, because the hash may change
-               // later if this feature gets merged with another
+             var h = _changes[id].head;
+             var b = _changes[id].base;
+             var entity = h || b;
 
-               results.push(Object.assign({}, feature)); // shallow copy
+             if (includeRelMembers && entity.type === 'relation') {
+               var mh = h ? h.members.map(function (m) {
+                 return m.id;
+               }) : [];
+               var mb = b ? b.members.map(function (m) {
+                 return m.id;
+               }) : [];
+               utilArrayUnion(mh, mb).forEach(function (memberID) {
+                 if (head.hasEntity(memberID)) {
+                   result.add(memberID);
+                 }
+               });
              }
-           }
-
-           return results;
-         },
-         loadTiles: function loadTiles(sourceID, template, projection) {
-           var source = _vtCache[sourceID];
-
-           if (!source) {
-             source = this.addSource(sourceID, template);
-           }
-
-           var tiles = tiler$7.getTiles(projection); // abort inflight requests that are no longer needed
+           });
+           return Array.from(result);
+         };
 
-           Object.keys(source.inflight).forEach(function (k) {
-             var wanted = tiles.find(function (tile) {
-               return k === tile.id;
-             });
+         _diff.modified = function modified() {
+           var result = [];
+           Object.values(_changes).forEach(function (change) {
+             if (change.base && change.head) {
+               result.push(change.head);
+             }
+           });
+           return result;
+         };
 
-             if (!wanted) {
-               abortRequest$7(source.inflight[k]);
-               delete source.inflight[k];
+         _diff.created = function created() {
+           var result = [];
+           Object.values(_changes).forEach(function (change) {
+             if (!change.base && change.head) {
+               result.push(change.head);
              }
            });
-           tiles.forEach(function (tile) {
-             loadTile(source, tile);
+           return result;
+         };
+
+         _diff.deleted = function deleted() {
+           var result = [];
+           Object.values(_changes).forEach(function (change) {
+             if (change.base && !change.head) {
+               result.push(change.base);
+             }
            });
-         },
-         cache: function cache() {
-           return _vtCache;
-         }
-       };
+           return result;
+         };
 
-       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;
-           }
+         _diff.summary = function summary() {
+           var relevant = {};
+           var keys = Object.keys(_changes);
 
-           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);
-             }
+           for (var i = 0; i < keys.length; i++) {
+             var change = _changes[keys[i]];
 
-             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;
-           }
+             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);
 
-           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 (moved) {
+                 addParents(change.head);
+               }
+
+               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');
              }
-
-             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;
            }
 
-           if (_wikidataCache[qid]) {
-             if (callback) callback(null, _wikidataCache[qid]);
-             return;
+           return Object.values(relevant);
+
+           function addEntity(entity, graph, changeType) {
+             relevant[entity.id] = {
+               entity: entity,
+               graph: graph,
+               changeType: changeType
+             };
            }
 
-           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);
-             }
+           function addParents(entity) {
+             var parents = head.parentWays(entity);
 
-             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;
+             for (var j = parents.length - 1; j >= 0; j--) {
+               var parent = parents[j];
+
+               if (!(parent.id in relevant)) {
+                 addEntity(parent, head, 'modified');
+               }
              }
+           }
+         }; // returns complete set of entities that require a redraw
+         //  (optionally within given `extent`)
+
+
+         _diff.complete = function complete(extent) {
+           var result = {};
+           var id, change;
 
+           for (id in _changes) {
+             change = _changes[id];
+             var h = change.head;
+             var b = change.base;
+             var entity = h || b;
              var i;
-             var description;
 
-             for (i in langs) {
-               var code = langs[i];
+             if (extent && (!h || !h.intersects(extent, head)) && (!b || !b.intersects(extent, base))) {
+               continue;
+             }
 
-               if (entity.descriptions[code] && entity.descriptions[code].language === code) {
-                 description = entity.descriptions[code];
-                 break;
+             result[id] = h;
+
+             if (entity.type === 'way') {
+               var nh = h ? h.nodes : [];
+               var nb = b ? b.nodes : [];
+               var diff;
+               diff = utilArrayDifference(nh, nb);
+
+               for (i = 0; i < diff.length; i++) {
+                 result[diff[i]] = head.hasEntity(diff[i]);
+               }
+
+               diff = utilArrayDifference(nb, nh);
+
+               for (i = 0; i < diff.length; i++) {
+                 result[diff[i]] = head.hasEntity(diff[i]);
                }
              }
 
-             if (!description && Object.values(entity.descriptions).length) description = Object.values(entity.descriptions)[0]; // prepare result
+             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);
 
-             var result = {
-               title: entity.id,
-               description: description ? description.value : '',
-               descriptionLocaleCode: description ? description.language : '',
-               editURL: 'https://www.wikidata.org/wiki/' + entity.id
-             }; // add image
+               for (i = 0; i < ids.length; i++) {
+                 var member = head.hasEntity(ids[i]);
+                 if (!member) continue; // not downloaded
 
-             if (entity.claims) {
-               var imageroot = 'https://commons.wikimedia.org/w/index.php';
-               var props = ['P154', 'P18']; // logo image, image
+                 if (extent && !member.intersects(extent, head)) continue; // not visible
 
-               var prop, image;
+                 result[ids[i]] = member;
+               }
+             }
 
-               for (i = 0; i < props.length; i++) {
-                 prop = entity.claims[props[i]];
+             addParents(head.parentWays(entity), result);
+             addParents(head.parentRelations(entity), result);
+           }
 
-                 if (prop && Object.keys(prop).length > 0) {
-                   image = prop[Object.keys(prop)[0]].mainsnak.datavalue.value;
+           return result;
 
-                   if (image) {
-                     result.imageURL = imageroot + '?' + utilQsString({
-                       title: 'Special:Redirect/file/' + image,
-                       width: 400
-                     });
-                     break;
-                   }
-                 }
-               }
+           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 (entity.sitelinks) {
-               var englishLocale = _mainLocalizer.languageCode().toLowerCase() === 'en'; // must be one of these that we requested..
+         return _diff;
+       }
 
-               for (i = 0; i < langs.length; i++) {
-                 // check each, in order of preference
-                 var w = langs[i] + 'wiki';
+       function coreTree(head) {
+         // tree for entities
+         var _rtree = new RBush();
 
-                 if (entity.sitelinks[w]) {
-                   var title = entity.sitelinks[w].title;
-                   var tKey = 'inspector.wiki_reference';
+         var _bboxes = {}; // maintain a separate tree for granular way segments
 
-                   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 _segmentsRTree = new RBush();
 
-                   result.wiki = {
-                     title: title,
-                     text: tKey,
-                     url: 'https://' + langs[i] + '.wikipedia.org/wiki/' + title.replace(/ /g, '_')
-                   };
-                   break;
-                 }
-               }
-             }
+         var _segmentsBBoxes = {};
+         var _segmentsByWayId = {};
+         var tree = {};
 
-             callback(null, result);
-           });
+         function entityBBox(entity) {
+           var bbox = entity.extent(head).bbox();
+           bbox.id = entity.id;
+           _bboxes[entity.id] = bbox;
+           return bbox;
          }
-       };
 
-       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;
+         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;
+         }
+
+         function removeEntity(entity) {
+           _rtree.remove(_bboxes[entity.id]);
+
+           delete _bboxes[entity.id];
+
+           if (_segmentsByWayId[entity.id]) {
+             _segmentsByWayId[entity.id].forEach(function (segment) {
+               _segmentsRTree.remove(_segmentsBBoxes[segment.id]);
+
+               delete _segmentsBBoxes[segment.id];
+             });
+
+             delete _segmentsByWayId[entity.id];
            }
+         }
 
-           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');
-             }
+         function loadEntities(entities) {
+           _rtree.load(entities.map(entityBBox));
 
-             if (callback) {
-               var titles = result.query.search.map(function (d) {
-                 return d.title;
-               });
-               callback(null, titles);
+           var segments = [];
+           entities.forEach(function (entity) {
+             if (entity.segments) {
+               var entitySegments = entity.segments(head); // cache these to make them easy to remove later
+
+               _segmentsByWayId[entity.id] = entitySegments;
+               segments = segments.concat(entitySegments);
              }
-           })["catch"](function (err) {
-             if (callback) callback(err, []);
            });
-         },
-         suggestions: function suggestions(lang, query, callback) {
-           if (!query) {
-             if (callback) callback('', []);
-             return;
-           }
+           if (segments.length) _segmentsRTree.load(segments.map(segmentBBox).filter(Boolean));
+         }
 
-           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');
+         function updateParents(entity, insertions, memo) {
+           head.parentWays(entity).forEach(function (way) {
+             if (_bboxes[way.id]) {
+               removeEntity(way);
+               insertions[way.id] = way;
              }
 
-             if (callback) callback(null, result[1] || []);
-           })["catch"](function (err) {
-             if (callback) callback(err.message, []);
+             updateParents(way, insertions, memo);
            });
-         },
-         translations: function translations(lang, title, callback) {
-           if (!title) {
-             if (callback) callback('No Title');
-             return;
-           }
+           head.parentRelations(entity).forEach(function (relation) {
+             if (memo[entity.id]) return;
+             memo[entity.id] = true;
 
-           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 (_bboxes[relation.id]) {
+               removeEntity(relation);
+               insertions[relation.id] = relation;
              }
 
-             if (callback) {
-               var list = result.query.pages[Object.keys(result.query.pages)[0]];
-               var translations = {};
+             updateParents(relation, insertions, memo);
+           });
+         }
 
-               if (list && list.langlinks) {
-                 list.langlinks.forEach(function (d) {
-                   translations[d.lang] = d['*'];
-                 });
-               }
+         tree.rebase = function (entities, force) {
+           var insertions = {};
 
-               callback(null, translations);
+           for (var i = 0; i < entities.length; i++) {
+             var entity = entities[i];
+             if (!entity.visible) continue;
+
+             if (head.entities.hasOwnProperty(entity.id) || _bboxes[entity.id]) {
+               if (!force) {
+                 continue;
+               } else if (_bboxes[entity.id]) {
+                 removeEntity(entity);
+               }
              }
-           })["catch"](function (err) {
-             if (callback) callback(err.message);
+
+             insertions[entity.id] = entity;
+             updateParents(entity, insertions, {});
+           }
+
+           loadEntities(Object.values(insertions));
+           return tree;
+         };
+
+         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);
+             });
+           }
+
+           if (changed.geometry) {
+             diff.modified().forEach(function (entity) {
+               removeEntity(entity);
+               insertions[entity.id] = entity;
+               updateParents(entity, insertions, {});
+             });
+           }
+
+           if (changed.addition) {
+             diff.created().forEach(function (entity) {
+               insertions[entity.id] = entity;
+             });
+           }
+
+           loadEntities(Object.values(insertions));
+         } // returns an array of entities with bounding boxes overlapping `extent` for the given `graph`
+
+
+         tree.intersects = function (extent, graph) {
+           updateToGraph(graph);
+           return _rtree.search(extent.bbox()).map(function (bbox) {
+             return graph.entity(bbox.id);
            });
-         }
-       };
+         }; // returns an array of segment objects with bounding boxes overlapping `extent` for the given `graph`
 
-       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
-       };
+
+         tree.waySegments = function (extent, graph) {
+           updateToGraph(graph);
+           return _segmentsRTree.search(extent.bbox()).map(function (bbox) {
+             return bbox.segment;
+           });
+         };
+
+         return tree;
+       }
 
        function svgIcon(name, svgklass, useklass) {
          return function drawIcon(selection) {
          };
        }
 
-       function uiNoteComments() {
-         var _note;
+       function uiModal(selection, blocking) {
+         var _this = this;
 
-         function noteComments(selection) {
-           if (_note.isNew()) return; // don't draw .comments-container
+         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);
 
-           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;
+         shaded.close = function () {
+           shaded.transition().duration(200).style('opacity', 0).remove();
+           modal.transition().duration(200).style('top', '0px');
+           select(document).call(keybinding.unbind);
+         };
 
-             if (osm && d.user) {
-               selection = selection.append('a').attr('class', 'comment-author-link').attr('href', osm.userURL(d.user)).attr('target', '_blank');
-             }
+         var modal = shaded.append('div').attr('class', 'modal fillL');
+         modal.append('input').attr('class', 'keytrap keytrap-first').on('focus.keytrap', moveFocusToLast);
 
-             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)
-             });
+         if (!blocking) {
+           shaded.on('click.remove-modal', function (d3_event) {
+             if (d3_event.target === _this) {
+               shaded.close();
+             }
            });
-           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);
+           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);
+         }
+
+         modal.append('div').attr('class', 'content');
+         modal.append('input').attr('class', 'keytrap keytrap-last').on('focus.keytrap', moveFocusToFirst);
+
+         if (animate) {
+           shaded.transition().style('opacity', 1);
+         } else {
+           shaded.style('opacity', 1);
+         }
+
+         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();
+
+           if (node) {
+             node.focus();
+           } else {
+             select(this).node().blur();
+           }
+         }
+
+         function moveFocusToLast() {
+           var nodes = modal.selectAll('a, button, input:not(.keytrap), select, textarea').nodes();
+
+           if (nodes.length) {
+             nodes[nodes.length - 1].focus();
+           } else {
+             select(this).node().blur();
+           }
          }
+       }
 
-         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
+       function uiLoading(context) {
+         var _modalSelection = select(null);
 
-           _note.comments.forEach(function (d) {
-             if (d.uid) uids[d.uid] = true;
-           });
+         var _message = '';
+         var _blocking = false;
 
-           Object.keys(uids).forEach(function (uid) {
-             osm.loadUser(uid, function (err, user) {
-               if (!user || !user.image_url) return;
-               selection.selectAll('.comment-avatar.user-' + uid).html('').append('img').attr('class', 'icon comment-avatar-icon').attr('src', user.image_url).attr('alt', user.display_name);
-             });
-           });
-         }
+         var loading = function loading(selection) {
+           _modalSelection = uiModal(selection, _blocking);
 
-         function localeDateString(s) {
-           if (!s) return null;
-           var options = {
-             day: 'numeric',
-             month: 'short',
-             year: 'numeric'
-           };
-           s = s.replace(/-/g, '/'); // fix browser-specific Date() issues
+           var loadertext = _modalSelection.select('.content').classed('loading-modal', true).append('div').attr('class', 'modal-section fillL');
 
-           var d = new Date(s);
-           if (isNaN(d.getTime())) return null;
-           return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
-         }
+           loadertext.append('img').attr('class', 'loader').attr('src', context.imagePath('loader-white.gif'));
+           loadertext.append('h3').html(_message);
 
-         noteComments.note = function (val) {
-           if (!arguments.length) return _note;
-           _note = val;
-           return noteComments;
-         };
+           _modalSelection.select('button.close').attr('class', 'hide');
 
-         return noteComments;
-       }
+           return loading;
+         };
 
-       function uiNoteHeader() {
-         var _note;
+         loading.message = function (val) {
+           if (!arguments.length) return _message;
+           _message = val;
+           return loading;
+         };
 
-         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');
-             }
+         loading.blocking = function (val) {
+           if (!arguments.length) return _blocking;
+           _blocking = val;
+           return loading;
+         };
 
-             return _t('note.note') + ' ' + d.id + ' ' + (d.status === 'closed' ? _t('note.closed') : '');
-           });
-         }
+         loading.close = function () {
+           _modalSelection.remove();
+         };
 
-         noteHeader.note = function (val) {
-           if (!arguments.length) return _note;
-           _note = val;
-           return noteHeader;
+         loading.isShown = function () {
+           return _modalSelection && !_modalSelection.empty() && _modalSelection.node().parentNode;
          };
 
-         return noteHeader;
+         return loading;
        }
 
-       function uiNoteReport() {
-         var _note;
+       function coreHistory(context) {
+         var dispatch = dispatch$8('reset', 'change', 'merge', 'restore', 'undone', 'redone');
 
-         function noteReport(selection) {
-           var url;
+         var _lock = utilSessionMutex('lock'); // restorable if iD not open in another window/tab and a saved history exists in localStorage
 
-           if (services.osm && _note instanceof osmNote && !_note.isNew()) {
-             url = services.osm.noteReportURL(_note);
-           }
 
-           var link = selection.selectAll('.note-report').data(url ? [url] : []); // exit
+         var _hasUnresolvedRestorableChanges = _lock.lock() && !!corePreferences(getKey('saved_history'));
 
-           link.exit().remove(); // enter
+         var duration = 150;
+         var _imageryUsed = [];
+         var _photoOverlaysUsed = [];
+         var _checkpoints = {};
 
-           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'));
-         }
+         var _pausedGraph;
 
-         noteReport.note = function (val) {
-           if (!arguments.length) return _note;
-           _note = val;
-           return noteReport;
-         };
+         var _stack;
 
-         return noteReport;
-       }
+         var _index;
 
-       function uiViewOnOSM(context) {
-         var _what; // an osmEntity or osmNote
+         var _tree; // internal _act, accepts list of actions and eased time
 
 
-         function viewOnOSM(selection) {
-           var url;
+         function _act(actions, t) {
+           actions = Array.prototype.slice.call(actions);
+           var annotation;
 
-           if (_what instanceof osmEntity) {
-             url = context.connection().entityURL(_what);
-           } else if (_what instanceof osmNote) {
-             url = context.connection().noteURL(_what);
+           if (typeof actions[actions.length - 1] !== 'function') {
+             annotation = actions.pop();
            }
 
-           var data = !_what || _what.isNew() ? [] : [_what];
-           var link = selection.selectAll('.view-on-osm').data(data, function (d) {
-             return d.id;
-           }); // exit
+           var graph = _stack[_index].graph;
 
-           link.exit().remove(); // enter
+           for (var i = 0; i < actions.length; i++) {
+             graph = actions[i](graph, t);
+           }
 
-           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'));
-         }
+           return {
+             graph: graph,
+             annotation: annotation,
+             imageryUsed: _imageryUsed,
+             photoOverlaysUsed: _photoOverlaysUsed,
+             transform: context.projection.transform(),
+             selectedIDs: context.selectedIDs()
+           };
+         } // internal _perform with eased time
 
-         viewOnOSM.what = function (_) {
-           if (!arguments.length) return _what;
-           _what = _;
-           return viewOnOSM;
-         };
 
-         return viewOnOSM;
-       }
+         function _perform(args, t) {
+           var previous = _stack[_index].graph;
+           _stack = _stack.slice(0, _index + 1);
 
-       function uiNoteEditor(context) {
-         var dispatch$1 = dispatch('change');
-         var noteComments = uiNoteComments();
-         var noteHeader = uiNoteHeader(); // var formFields = uiFormFields(context);
+           var actionResult = _act(args, t);
 
-         var _note;
+           _stack.push(actionResult);
 
-         var _newNote; // var _fieldsArr;
+           _index++;
+           return change(previous);
+         } // internal _replace with eased time
 
 
-         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
+         function _replace(args, t) {
+           var previous = _stack[_index].graph; // assert(_index == _stack.length - 1)
 
-           var osm = services.osm;
+           var actionResult = _act(args, t);
 
-           if (osm) {
-             osm.on('change.note-save', function () {
-               selection.call(noteEditor);
-             });
-           }
-         }
+           _stack[_index] = actionResult;
+           return change(previous);
+         } // internal _overwrite with eased time
 
-         function noteSaveSection(selection) {
-           var isSelected = _note && _note.id === context.selectedNoteID();
 
-           var noteSave = selection.selectAll('.note-save').data(isSelected ? [_note] : [], function (d) {
-             return d.status + d.id;
-           }); // exit
+         function _overwrite(args, t) {
+           var previous = _stack[_index].graph;
 
-           noteSave.exit().remove(); // enter
+           if (_index > 0) {
+             _index--;
 
-           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);
-           // }
+             _stack.pop();
+           }
 
-           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);
+           _stack = _stack.slice(0, _index + 1);
 
-           if (!commentTextarea.empty() && _newNote) {
-             // autofocus the comment field for new notes
-             commentTextarea.node().focus();
-           } // update
+           var actionResult = _act(args, t);
 
+           _stack.push(actionResult);
 
-           noteSave = noteSaveEnter.merge(noteSave).call(userDetails).call(noteSaveButtons); // fast submit if user presses cmd+enter
+           _index++;
+           return change(previous);
+         } // determine difference and dispatch a change 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();
-             select(this).on('keydown.note-input', null); // focus on button and submit
 
-             window.setTimeout(function () {
-               if (_note.isNew()) {
-                 noteSave.selectAll('.save-button').node().focus();
-                 clickSave();
-               } else {
-                 noteSave.selectAll('.comment-button').node().focus();
-                 clickComment();
-               }
-             }, 10);
+         function change(previous) {
+           var difference = coreDifference(previous, history.graph());
+
+           if (!_pausedGraph) {
+             dispatch.call('change', this, difference);
            }
 
-           function changeInput() {
-             var input = select(this);
-             var val = input.property('value').trim() || undefined; // store the unsaved comment with the note itself
+           return difference;
+         } // iD uses namespaced keys so multiple installations do not conflict
 
-             _note = _note.update({
-               newComment: val
+
+         function getKey(n) {
+           return 'iD_' + window.location.origin + '_' + n;
+         }
+
+         var history = {
+           graph: function graph() {
+             return _stack[_index].graph;
+           },
+           tree: function tree() {
+             return _tree;
+           },
+           base: function base() {
+             return _stack[0].graph;
+           },
+           merge: function merge(entities
+           /*, extent*/
+           ) {
+             var stack = _stack.map(function (state) {
+               return state.graph;
              });
-             var osm = services.osm;
 
-             if (osm) {
-               osm.replaceNote(_note); // update note cache
+             _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;
              }
 
-             noteSave.call(noteSaveButtons);
-           }
-         }
+             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;
 
-         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 (isNaN(+n) || +n < 0) {
+               n = 1;
+             }
 
-           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'));
+             while (n-- > 0 && _index > 0) {
+               _index--;
 
-             if (user.image_url) {
-               userLink.append('img').attr('src', user.image_url).attr('class', 'icon pre-text user-icon');
+               _stack.pop();
              }
 
-             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()
-             }));
-           });
-         }
+             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;
 
-         function noteSaveButtons(selection) {
-           var osm = services.osm;
-           var hasAuth = osm && osm.authenticated();
+             while (_index > 0) {
+               _index--;
+               if (_stack[_index].annotation) break;
+             }
 
-           var isSelected = _note && _note.id === context.selectedNoteID();
+             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;
 
-           var buttonSection = selection.selectAll('.buttons').data(isSelected ? [_note] : [], function (d) {
-             return d.status + d.id;
-           }); // exit
+             while (tryIndex < _stack.length - 1) {
+               tryIndex++;
 
-           buttonSection.exit().remove(); // enter
+               if (_stack[tryIndex].annotation) {
+                 _index = tryIndex;
+                 dispatch.call('redone', this, _stack[_index], previousStack);
+                 break;
+               }
+             }
 
-           var buttonEnter = buttonSection.enter().append('div').attr('class', 'buttons');
+             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;
 
-           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
+             while (i >= 0) {
+               if (_stack[i].annotation) return _stack[i].annotation;
+               i--;
+             }
+           },
+           redoAnnotation: function redoAnnotation() {
+             var i = _index + 1;
 
+             while (i <= _stack.length - 1) {
+               if (_stack[i].annotation) return _stack[i].annotation;
+               i++;
+             }
+           },
+           // Returns the entities from the active graph with bounding boxes
+           // overlapping the given `extent`.
+           intersects: function intersects(extent) {
+             return _tree.intersects(extent, _stack[_index].graph);
+           },
+           difference: function difference() {
+             var base = _stack[0].graph;
+             var head = _stack[_index].graph;
+             return coreDifference(base, head);
+           },
+           changes: function changes(action) {
+             var base = _stack[0].graph;
+             var head = _stack[_index].graph;
 
-           buttonSection = buttonSection.merge(buttonEnter);
-           buttonSection.select('.cancel-button') // select and propagate data
-           .on('click.cancel', clickCancel);
-           buttonSection.select('.save-button') // select and propagate data
-           .attr('disabled', isSaveDisabled).on('click.save', clickSave);
-           buttonSection.select('.status-button') // select and propagate data
-           .attr('disabled', hasAuth ? null : true).html(function (d) {
-             var action = d.status === 'open' ? 'close' : 'open';
-             var andComment = d.newComment ? '_comment' : '';
-             return _t('note.' + action + andComment);
-           }).on('click.status', clickStatus);
-           buttonSection.select('.comment-button') // select and propagate data
-           .attr('disabled', isSaveDisabled).on('click.comment', clickComment);
+             if (action) {
+               head = action(head);
+             }
 
-           function isSaveDisabled(d) {
-             return hasAuth && d.status === 'open' && d.newComment ? null : true;
-           }
-         }
+             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();
 
-         function clickCancel(d3_event, d) {
-           this.blur(); // avoid keeping focus on the button - #4641
+               _stack.slice(1, _index + 1).forEach(function (state) {
+                 state.imageryUsed.forEach(function (source) {
+                   if (source !== 'Custom') {
+                     s.add(source);
+                   }
+                 });
+               });
 
-           var osm = services.osm;
+               return Array.from(s);
+             }
+           },
+           photoOverlaysUsed: function photoOverlaysUsed(sources) {
+             if (sources) {
+               _photoOverlaysUsed = sources;
+               return history;
+             } else {
+               var s = new Set();
 
-           if (osm) {
-             osm.removeNote(d);
-           }
+               _stack.slice(1, _index + 1).forEach(function (state) {
+                 if (state.photoOverlaysUsed && Array.isArray(state.photoOverlaysUsed)) {
+                   state.photoOverlaysUsed.forEach(function (photoOverlay) {
+                     s.add(photoOverlay);
+                   });
+                 }
+               });
 
-           context.enter(modeBrowse(context));
-           dispatch$1.call('change');
-         }
+               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 = {};
+             }
 
-         function clickSave(d3_event, d) {
-           this.blur(); // avoid keeping focus on the button - #4641
+             dispatch.call('reset');
+             dispatch.call('change');
+             return history;
+           },
+           // `toIntroGraph()` is used to export the intro graph used by the walkthrough.
+           //
+           // To use it:
+           //  1. Start the walkthrough.
+           //  2. Get to a "free editing" tutorial step
+           //  3. Make your edits to the walkthrough map
+           //  4. In your browser dev console run:
+           //        `id.history().toIntroGraph()`
+           //  5. This outputs stringified JSON to the browser console
+           //  6. Copy it to `data/intro_graph.json` and prettify it in your code editor
+           toIntroGraph: function toIntroGraph() {
+             var nextID = {
+               n: 0,
+               r: 0,
+               w: 0
+             };
+             var permIDs = {};
+             var graph = this.graph();
+             var baseEntities = {}; // clone base entities..
 
-           var osm = services.osm;
+             Object.values(graph.base().entities).forEach(function (entity) {
+               var copy = copyIntroEntity(entity);
+               baseEntities[copy.id] = copy;
+             }); // replace base entities with head entities..
 
-           if (osm) {
-             osm.postNoteCreate(d, function (err, note) {
-               dispatch$1.call('change', note);
-             });
-           }
-         }
+             Object.keys(graph.entities).forEach(function (id) {
+               var entity = graph.entities[id];
 
-         function clickStatus(d3_event, d) {
-           this.blur(); // avoid keeping focus on the button - #4641
+               if (entity) {
+                 var copy = copyIntroEntity(entity);
+                 baseEntities[copy.id] = copy;
+               } else {
+                 delete baseEntities[id];
+               }
+             }); // swap temporary for permanent ids..
 
-           var osm = services.osm;
+             Object.values(baseEntities).forEach(function (entity) {
+               if (Array.isArray(entity.nodes)) {
+                 entity.nodes = entity.nodes.map(function (node) {
+                   return permIDs[node] || node;
+                 });
+               }
 
-           if (osm) {
-             var setStatus = d.status === 'open' ? 'closed' : 'open';
-             osm.postNoteUpdate(d, setStatus, function (err, note) {
-               dispatch$1.call('change', note);
+               if (Array.isArray(entity.members)) {
+                 entity.members = entity.members.map(function (member) {
+                   member.id = permIDs[member.id] || member.id;
+                   return member;
+                 });
+               }
+             });
+             return JSON.stringify({
+               dataIntroGraph: baseEntities
              });
-           }
-         }
-
-         function clickComment(d3_event, d) {
-           this.blur(); // avoid keeping focus on the button - #4641
 
-           var osm = services.osm;
+             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 (osm) {
-             osm.postNoteUpdate(d, d.status, function (err, note) {
-               dispatch$1.call('change', note);
-             });
-           }
-         }
+               if (copy.tags && !Object.keys(copy.tags)) {
+                 delete copy.tags;
+               }
 
-         noteEditor.note = function (val) {
-           if (!arguments.length) return _note;
-           _note = val;
-           return noteEditor;
-         };
+               if (Array.isArray(copy.loc)) {
+                 copy.loc[0] = +copy.loc[0].toFixed(6);
+                 copy.loc[1] = +copy.loc[1].toFixed(6);
+               }
 
-         noteEditor.newNote = function (val) {
-           if (!arguments.length) return _newNote;
-           _newNote = val;
-           return noteEditor;
-         };
+               var match = source.id.match(/([nrw])-\d*/); // temporary id
 
-         return utilRebind(noteEditor, dispatch$1, 'on');
-       }
+               if (match !== null) {
+                 var nrw = match[1];
+                 var permID;
 
-       function modeSelectNote(context, selectedNoteID) {
-         var mode = {
-           id: 'select-note',
-           button: 'browse'
-         };
+                 do {
+                   permID = nrw + ++nextID[nrw];
+                 } while (baseEntities.hasOwnProperty(permID));
 
-         var _keybinding = utilKeybinding('select-note');
+                 copy.id = permIDs[source.id] = permID;
+               }
 
-         var _noteEditor = uiNoteEditor(context).on('change', function () {
-           context.map().pan([0, 0]); // trigger a redraw
+               return copy;
+             }
+           },
+           toJSON: function toJSON() {
+             if (!this.hasChanges()) return;
+             var allEntities = {};
+             var baseEntities = {};
+             var base = _stack[0];
 
-           var note = checkSelectedID();
-           if (!note) return;
-           context.ui().sidebar.show(_noteEditor.note(note));
-         });
+             var s = _stack.map(function (i) {
+               var modified = [];
+               var deleted = [];
+               Object.keys(i.graph.entities).forEach(function (id) {
+                 var entity = i.graph.entities[id];
 
-         var _behaviors = [behaviorBreathe(), behaviorHover(context), behaviorSelect(context), behaviorLasso(context), modeDragNode(context).behavior, modeDragNote(context).behavior];
-         var _newFeature = false;
+                 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.
 
-         function checkSelectedID() {
-           if (!services.osm) return;
-           var note = services.osm.getNote(selectedNoteID);
 
-           if (!note) {
-             context.enter(modeBrowse(context));
-           }
+                 if (id in base.graph.entities) {
+                   baseEntities[id] = base.graph.entities[id];
+                 }
 
-           return note;
-         } // class the note as selected, or return to browse mode if the note is gone
+                 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
 
 
-         function selectNote(d3_event, drawn) {
-           if (!checkSelectedID()) return;
-           var selection = context.surface().selectAll('.layer-notes .note-' + selectedNoteID);
+                 var baseParents = base.graph._parentWays[id];
 
-           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 (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;
+             });
 
-             if (drawn && source && (source.type === 'pointermove' || source.type === 'mousemove' || source.type === 'touchmove')) {
-               context.enter(modeBrowse(context));
-             }
-           } else {
-             selection.classed('selected', true);
-             context.selectedNoteID(selectedNoteID);
-           }
-         }
+             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;
 
-         function esc() {
-           if (context.container().select('.combobox').size()) return;
-           context.enter(modeBrowse(context));
-         }
+             if (h.version === 2 || h.version === 3) {
+               var allEntities = {};
+               h.entities.forEach(function (entity) {
+                 allEntities[osmEntity.key(entity)] = osmEntity(entity);
+               });
 
-         mode.zoomToSelected = function () {
-           if (!services.osm) return;
-           var note = services.osm.getNote(selectedNoteID);
+               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 (note) {
-             context.map().centerZoomEase(note.loc, 20);
-           }
-         };
+                 var stack = _stack.map(function (state) {
+                   return state.graph;
+                 });
 
-         mode.newFeature = function (val) {
-           if (!arguments.length) return _newFeature;
-           _newFeature = val;
-           return mode;
-         };
+                 _stack[0].graph.rebase(baseEntities, stack, true);
 
-         mode.enter = function () {
-           var note = checkSelectedID();
-           if (!note) 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
 
-           _behaviors.forEach(context.install);
 
-           _keybinding.on(_t('inspector.zoom_to.key'), mode.zoomToSelected).on('⎋', esc, true);
+                 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);
+                   });
 
-           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
+                   if (missing.length && osm) {
+                     loadComplete = false;
+                     context.map().redrawEnable(false);
+                     var loading = uiLoading(context).blocking(true);
+                     context.container().call(loading);
 
-           sidebar.expand(sidebar.intersects(note.extent()));
-           context.map().on('drawn.select', selectNote);
-         };
+                     var childNodesLoaded = function childNodesLoaded(err, result) {
+                       if (!err) {
+                         var visibleGroups = utilArrayGroupBy(result.data, 'visible');
+                         var visibles = visibleGroups["true"] || []; // alive nodes
 
-         mode.exit = function () {
-           _behaviors.forEach(context.uninstall);
+                         var invisibles = visibleGroups["false"] || []; // deleted nodes
 
-           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);
-         };
+                         if (visibles.length) {
+                           var visibleIDs = visibles.map(function (entity) {
+                             return entity.id;
+                           });
 
-         return mode;
-       }
+                           var stack = _stack.map(function (state) {
+                             return state.graph;
+                           });
 
-       function modeDragNote(context) {
-         var mode = {
-           id: 'drag-note',
-           button: 'browse'
-         };
-         var edit = behaviorEdit(context);
+                           missing = utilArrayDifference(missing, visibleIDs);
 
-         var _nudgeInterval;
+                           _stack[0].graph.rebase(visibles, stack, true);
 
-         var _lastLoc;
+                           _tree.rebase(visibles, true);
+                         } // fetch older versions of nodes that were deleted..
 
-         var _note; // most current note.. dragged note may have stale datum.
 
+                         invisibles.forEach(function (entity) {
+                           osm.loadEntityVersion(entity.id, +entity.version - 1, childNodesLoaded);
+                         });
+                       }
 
-         function startNudge(d3_event, nudge) {
-           if (_nudgeInterval) window.clearInterval(_nudgeInterval);
-           _nudgeInterval = window.setInterval(function () {
-             context.map().pan(nudge);
-             doMove(d3_event, nudge);
-           }, 50);
-         }
+                       if (err || !missing.length) {
+                         loading.close();
+                         context.map().redrawEnable(true);
+                         dispatch.call('change');
+                         dispatch.call('restore', this);
+                       }
+                     };
 
-         function stopNudge() {
-           if (_nudgeInterval) {
-             window.clearInterval(_nudgeInterval);
-             _nudgeInterval = null;
-           }
-         }
+                     osm.loadMultiple(missing, childNodesLoaded);
+                   }
+                 }
+               }
 
-         function origin(note) {
-           return context.projection(note.loc);
-         }
+               _stack = h.stack.map(function (d) {
+                 var entities = {},
+                     entity;
 
-         function start(d3_event, note) {
-           _note = note;
-           var osm = services.osm;
+                 if (d.modified) {
+                   d.modified.forEach(function (key) {
+                     entity = allEntities[key];
+                     entities[entity.id] = entity;
+                   });
+                 }
 
-           if (osm) {
-             // Get latest note from cache.. The marker may have a stale datum bound to it
-             // and dragging it around can sometimes delete the users note comment.
-             _note = osm.getNote(_note.id);
-           }
+                 if (d.deleted) {
+                   d.deleted.forEach(function (id) {
+                     entities[id] = undefined;
+                   });
+                 }
 
-           context.surface().selectAll('.note-' + _note.id).classed('active', true);
-           context.perform(actionNoop());
-           context.enter(mode);
-           context.selectedNoteID(_note.id);
-         }
+                 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 move(d3_event, entity, point) {
-           d3_event.stopPropagation();
-           _lastLoc = context.projection.invert(point);
-           doMove(d3_event);
-           var nudge = geoViewportEdge(point, context.map().dimensions());
+                 for (var i in d.entities) {
+                   var entity = d.entities[i];
+                   entities[i] = entity === 'undefined' ? undefined : osmEntity(entity);
+                 }
 
-           if (nudge) {
-             startNudge(d3_event, nudge);
-           } else {
-             stopNudge();
-           }
-         }
+                 d.graph = coreGraph(_stack[0].graph).load(entities);
+                 return d;
+               });
+             }
 
-         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 transform = _stack[_index].transform;
 
-           if (osm) {
-             osm.replaceNote(_note); // update note cache
-           }
+             if (transform) {
+               context.map().transformEase(transform, 0); // 0 = immediate, no easing
+             }
 
-           context.replace(actionNoop()); // trigger redraw
-         }
+             if (loadComplete) {
+               dispatch.call('change');
+               dispatch.call('restore', this);
+             }
 
-         function end() {
-           context.replace(actionNoop()); // trigger redraw
+             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);
+             }
 
-           context.selectedNoteID(_note.id).enter(modeSelectNote(context, _note.id));
-         }
+             return history;
+           },
+           // delete the history version saved in localStorage
+           clearSaved: function clearSaved() {
+             context.debouncedSave.cancel();
 
-         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 (_lock.locked()) {
+               _hasUnresolvedRestorableChanges = false;
+               corePreferences(getKey('saved_history'), null); // clear the changeset metadata associated with the saved history
 
-         mode.enter = function () {
-           context.install(edit);
-         };
+               corePreferences('comment', null);
+               corePreferences('hashtags', null);
+               corePreferences('source', null);
+             }
 
-         mode.exit = function () {
-           context.ui().sidebar.hover.cancel();
-           context.uninstall(edit);
-           context.surface().selectAll('.active').classed('active', false);
-           stopNudge();
+             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
          };
-
-         mode.behavior = drag;
-         return mode;
+         history.reset();
+         return utilRebind(history, dispatch, 'on');
        }
 
-       function uiDataHeader() {
-         var _datum;
+       /**
+        * Look for roads that can be connected to other roads with a short extension
+        */
 
-         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'));
-         }
+       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
 
-         dataHeader.datum = function (val) {
-           if (!arguments.length) return _datum;
-           _datum = val;
-           return this;
-         };
+         var CLOSE_NODE_TH = EXTEND_TH_METERS - WELD_TH_METERS; // Comes from considering bounding case of perpendicular ways
 
-         return dataHeader;
-       }
+         var SIG_ANGLE_TH = Math.atan(WELD_TH_METERS / EXTEND_TH_METERS);
 
-       // 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 isHighway(entity) {
+           return entity.type === 'way' && osmRoutableHighwayTagValues[entity.tags.highway];
+         }
 
-       var _comboHideTimerID;
+         function isTaggedAsNotContinuing(node) {
+           return node.tags.noexit === 'yes' || node.tags.amenity === 'parking_entrance' || node.tags.entrance && node.tags.entrance !== 'no';
+         }
 
-       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;
+         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 _mouseEnterHandler, _mouseLeaveHandler;
+                 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;
 
-         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 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 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 _this$issue$entityIds = _slicedToArray(this.issue.entityIds, 3),
+                     endNodeId = _this$issue$entityIds[1],
+                     crossWayId = _this$issue$entityIds[2];
 
-               input.node().focus(); // focus the input as if it was clicked
+                 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)
 
-               mousedown(d3_event);
-             }).on('mouseup.combo-caret', function (d3_event) {
-               d3_event.preventDefault(); // don't steal focus from input
+                 var nearEndNodes = findNearbyEndNodes(endNode, crossWay);
 
-               mouseup(d3_event);
-             });
-           });
+                 if (nearEndNodes.length > 0) {
+                   var collinear = findSmallJoinAngle(midNode, endNode, nearEndNodes);
 
-           function mousedown(d3_event) {
-             if (d3_event.button !== 0) return; // left click only
+                   if (collinear) {
+                     context.perform(actionMergeNodes([collinear.id, endNode.id], collinear.loc), annotation);
+                     return;
+                   }
+                 }
 
-             _tDown = +new Date(); // clear selection
+                 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
 
-             var start = input.property('selectionStart');
-             var end = input.property('selectionEnd');
+                 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]);
 
-             if (start !== end) {
-               var val = utilGetSetValue(input);
-               input.node().setSelectionRange(val.length, val.length);
-               return;
+             if (node && !node.hasInterestingTags()) {
+               // node has no descriptive tags, suggest noexit fix
+               fixes.push(new validationIssueFix({
+                 icon: 'maki-barrier',
+                 title: _t.html('issues.fix.tag_as_disconnected.title'),
+                 onClick: function onClick(context) {
+                   var nodeID = this.issue.entityIds[1];
+                   var tags = Object.assign({}, context.entity(nodeID).tags);
+                   tags.noexit = 'yes';
+                   context.perform(actionChangeTags(nodeID, tags), _t('issues.fix.tag_as_disconnected.annotation'));
+                 }
+               }));
              }
 
-             input.on('mouseup.combo-input', mouseup);
+             return fixes;
            }
 
-           function mouseup(d3_event) {
-             input.on('mouseup.combo-input', null);
-             if (d3_event.button !== 0) return; // left click only
+           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'));
+           }
 
-             if (input.node() !== document.activeElement) return; // exit if this input is not focused
+           function isExtendableCandidate(node, way) {
+             // can not accurately test vertices on tiles not downloaded from osm - #5938
+             var osm = services.osm;
 
-             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 (osm && !osm.isDataLoaded(node.loc)) {
+               return false;
+             }
 
-             var combo = container.selectAll('.combobox');
+             if (isTaggedAsNotContinuing(node) || graph.parentWays(node).length !== 1) {
+               return false;
+             }
 
-             if (combo.empty() || combo.datum() !== input.node()) {
-               var tOrig = _tDown;
-               window.setTimeout(function () {
-                 if (tOrig !== _tDown) return; // exit if user double clicked
+             var occurrences = 0;
 
-                 fetchComboData('', function () {
-                   show();
-                   render();
-                 });
-               }, 250);
-             } else {
-               hide();
+             for (var index in way.nodes) {
+               if (way.nodes[index] === node.id) {
+                 occurrences += 1;
+
+                 if (occurrences > 1) {
+                   return false;
+                 }
+               }
              }
-           }
 
-           function focus() {
-             fetchComboData(''); // prefetch values (may warm taginfo cache)
+             return true;
            }
 
-           function blur() {
-             _comboHideTimerID = window.setTimeout(hide, 75);
-           }
+           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 show() {
-             hide(); // remove any existing
+               testNodes[nodeIndex] = testNodes[nodeIndex].move(connectionInfo.cross_loc); // don't flag issue if connecting the ways would cause self-intersection
 
-             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();
+               if (geoHasSelfIntersections(testNodes, nodeID)) return;
+               results.push(connectionInfo);
              });
-             container.on('scroll.combo-scroll', render, true);
+             return results;
            }
 
-           function hide() {
-             if (_comboHideTimerID) {
-               window.clearTimeout(_comboHideTimerID);
-               _comboHideTimerID = undefined;
-             }
-
-             container.selectAll('.combobox').remove();
-             container.on('scroll.combo-scroll', null);
+           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;
+             });
            }
 
-           function keydown(d3_event) {
-             var shown = !container.selectAll('.combobox').empty();
-             var tagName = input.node() ? input.node().tagName.toLowerCase() : '';
-
-             switch (d3_event.keyCode) {
-               case 8: // ⌫ Backspace
-
-               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;
-
-               case 9:
-                 // ⇥ Tab
-                 accept();
-                 break;
+           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
 
-               case 13:
-                 // ↩ Return
-                 d3_event.preventDefault();
-                 d3_event.stopPropagation();
-                 break;
+             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);
 
-               case 38:
-                 // ↑ Up arrow
-                 if (tagName === 'textarea' && !shown) return;
-                 d3_event.preventDefault();
+               if (diff < minAngle) {
+                 joinTo = endNode;
+                 minAngle = diff;
+               }
+             });
+             /* Threshold set by considering right angle triangle
+             based on node joining threshold and extension distance */
 
-                 if (tagName === 'input' && !shown) {
-                   show();
-                 }
+             if (minAngle <= SIG_ANGLE_TH) return joinTo;
+             return null;
+           }
 
-                 nav(-1);
-                 break;
+           function hasTag(tags, key) {
+             return tags[key] !== undefined && tags[key] !== 'no';
+           }
 
-               case 40:
-                 // ↓ Down arrow
-                 if (tagName === 'textarea' && !shown) return;
-                 d3_event.preventDefault();
+           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
 
-                 if (tagName === 'input' && !shown) {
-                   show();
-                 }
+             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
 
-                 nav(+1);
-                 break;
-             }
+             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;
            }
 
-           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 canConnectByExtend(way, endNodeIdx) {
+             var tipNid = way.nodes[endNodeIdx]; // the 'tip' node for extension point
 
+             var midNid = endNodeIdx === 0 ? way.nodes[1] : way.nodes[way.nodes.length - 2]; // the other node of the edge
 
-           function change() {
-             fetchComboData(value(), function () {
-               _selected = null;
-               var val = input.property('value');
+             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
 
-               if (_suggestions.length) {
-                 if (input.property('selectionEnd') === val.length) {
-                   _selected = tryAutocomplete();
-                 }
+             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
 
-                 if (!_selected) {
-                   _selected = val;
-                 }
-               }
+             var segmentInfos = tree.waySegments(queryExtent, graph);
 
-               if (val.length) {
-                 var combo = container.selectAll('.combobox');
+             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]);
 
-                 if (combo.empty()) {
-                   show();
-                 }
-               } else {
-                 hide();
+               if (crossLoc) {
+                 return {
+                   mid: midNode,
+                   node: tipNode,
+                   wid: way2.id,
+                   edge: [nA.id, nB.id],
+                   cross_loc: crossLoc
+                 };
                }
-
-               render();
-             });
-           } // Called when the user presses up/down arrows to navigate the list
-
-
-           function nav(dir) {
-             if (_suggestions.length) {
-               // try to determine previously selected index..
-               var index = -1;
-
-               for (var i = 0; i < _suggestions.length; i++) {
-                 if (_selected && _suggestions[i].value === _selected) {
-                   index = i;
-                   break;
-                 }
-               } // pick new _selected
-
-
-               index = Math.max(Math.min(index + dir, _suggestions.length - 1), 0);
-               _selected = _suggestions[index].value;
-               input.property('value', _selected);
              }
 
-             render();
-             ensureVisible();
+             return null;
            }
+         };
 
-           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
-
+         validation.type = type;
+         return validation;
+       }
 
-             var selected = combo.selectAll('.combobox-option.selected').node();
+       function validationCloseNodes(context) {
+         var type = 'close_nodes';
+         var pointThresholdMeters = 0.2;
 
-             if (selected) {
-               selected.scrollIntoView({
-                 behavior: 'smooth',
-                 block: 'nearest'
-               });
-             }
+         var validation = function validation(entity, graph) {
+           if (entity.type === 'node') {
+             return getIssuesForNode(entity);
+           } else if (entity.type === 'way') {
+             return getIssuesForWay(entity);
            }
 
-           function value() {
-             var value = input.property('value');
-             var start = input.property('selectionStart');
-             var end = input.property('selectionEnd');
+           return [];
 
-             if (start && end) {
-               value = value.substring(0, start);
-             }
+           function getIssuesForNode(node) {
+             var parentWays = graph.parentWays(node);
 
-             return value;
+             if (parentWays.length) {
+               return getIssuesForVertex(node, parentWays);
+             } else {
+               return getIssuesForDetachedPoint(node);
+             }
            }
 
-           function fetchComboData(v, cb) {
-             _cancelFetch = false;
+           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);
 
-             _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;
-               });
+             for (var i in parentRelations) {
+               var relation = parentRelations[i];
+               if (relation.tags.type === 'boundary') return 'boundary';
 
-               if (cb) {
-                 cb();
+               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';
                }
-             });
+             }
+
+             return 'other';
            }
 
-           function tryAutocomplete() {
-             if (!_canAutocomplete) return;
-             var val = _caseSensitive ? value() : value().toLowerCase();
-             if (!val) return; // Don't autocomplete if user is typing a number - #4935
+           function shouldCheckWay(way) {
+             // don't flag issues where merging would create degenerate ways
+             if (way.nodes.length <= 2 || way.isClosed() && way.nodes.length <= 4) return false;
+             var bbox = way.extent(graph).bbox();
+             var hypotenuseMeters = geoSphericalDistance([bbox.minX, bbox.minY], [bbox.maxX, bbox.maxY]); // don't flag close nodes in very small ways
 
-             if (!isNaN(parseFloat(val)) && isFinite(val)) return;
-             var bestIndex = -1;
+             if (hypotenuseMeters < 1.5) return false;
+             return true;
+           }
 
-             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..
+           function getIssuesForWay(way) {
+             if (!shouldCheckWay(way)) return [];
+             var issues = [],
+                 nodes = graph.childNodes(way);
 
-               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;
-               }
+             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);
              }
 
-             if (bestIndex !== -1) {
-               var bestVal = _suggestions[bestIndex].value;
-               input.property('value', bestVal);
-               input.node().setSelectionRange(val.length, bestVal.length);
-               return bestVal;
-             }
+             return issues;
            }
 
-           function render() {
-             if (_suggestions.length < _minItems || document.activeElement !== input.node()) {
-               hide();
-               return;
+           function getIssuesForVertex(node, parentWays) {
+             var issues = [];
+
+             function checkForCloseness(node1, node2, way) {
+               var issue = getWayIssueIfAny(node1, node2, way);
+               if (issue) issues.push(issue);
              }
 
-             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
+             for (var i = 0; i < parentWays.length; i++) {
+               var parentWay = parentWays[i];
+               if (!shouldCheckWay(parentWay)) continue;
+               var lastIndex = parentWay.nodes.length - 1;
 
-             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.
+               for (var j = 0; j < parentWay.nodes.length; j++) {
+                 if (j !== 0) {
+                   if (parentWay.nodes[j - 1] === node.id) {
+                     checkForCloseness(node, graph.entity(parentWay.nodes[j]), parentWay);
+                   }
+                 }
 
+                 if (j !== lastIndex) {
+                   if (parentWay.nodes[j + 1] === node.id) {
+                     checkForCloseness(graph.entity(parentWay.nodes[j]), node, parentWay);
+                   }
+                 }
+               }
+             }
 
-           function accept(d3_event, d) {
-             _cancelFetch = true;
-             var thiz = input.node();
+             return issues;
+           }
 
-             if (d) {
-               // user clicked on a suggestion
-               utilGetSetValue(input, d.value); // replace field contents
+           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
 
-               utilTriggerEvent(input, 'change');
-             } // clear (and keep) selection
+             if (wayType === 'boundary') return 0; // expect some features to be mapped with higher levels of detail
 
+             if (wayType === 'indoor') return 0.01;
+             if (wayType === 'building') return 0.05;
+             if (wayType === 'path') return 0.1;
+             return 0.2;
+           }
 
-             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.
+           function getIssuesForDetachedPoint(node) {
+             var issues = [];
+             var lon = node.loc[0];
+             var lat = node.loc[1];
+             var lon_range = geoMetersToLon(pointThresholdMeters, lat) / 2;
+             var lat_range = geoMetersToLat(pointThresholdMeters) / 2;
+             var queryExtent = geoExtent([[lon - lon_range, lat - lat_range], [lon + lon_range, lat + lat_range]]);
+             var intersected = context.history().tree().intersects(queryExtent, graph);
 
+             for (var 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;
 
-           function cancel() {
-             _cancelFetch = true;
-             var thiz = input.node(); // clear (and remove) selection, and replace field contents
+               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 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();
-           }
-         };
+                 for (var key in zAxisKeys) {
+                   var nodeValue = node.tags[key] || '0';
+                   var nearbyValue = nearby.tags[key] || '0';
 
-         combobox.canAutocomplete = function (val) {
-           if (!arguments.length) return _canAutocomplete;
-           _canAutocomplete = val;
-           return combobox;
-         };
+                   if (nodeValue !== nearbyValue) {
+                     zAxisDifferentiates = true;
+                     break;
+                   }
+                 }
 
-         combobox.caseSensitive = function (val) {
-           if (!arguments.length) return _caseSensitive;
-           _caseSensitive = val;
-           return combobox;
-         };
+                 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')
+                     })];
+                   }
+                 }));
+               }
+             }
 
-         combobox.data = function (val) {
-           if (!arguments.length) return _data;
-           _data = val;
-           return combobox;
-         };
+             return issues;
 
-         combobox.fetcher = function (val) {
-           if (!arguments.length) return _fetcher;
-           _fetcher = val;
-           return combobox;
-         };
+             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);
+             }
+           }
 
-         combobox.minItems = function (val) {
-           if (!arguments.length) return _minItems;
-           _minItems = val;
-           return combobox;
-         };
+           function getWayIssueIfAny(node1, node2, way) {
+             if (node1.id === node2.id || node1.hasInterestingTags() && node2.hasInterestingTags()) {
+               return null;
+             }
 
-         combobox.itemsMouseEnter = function (val) {
-           if (!arguments.length) return _mouseEnterHandler;
-           _mouseEnterHandler = val;
-           return combobox;
-         };
+             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;
+             }
 
-         combobox.itemsMouseLeave = function (val) {
-           if (!arguments.length) return _mouseLeaveHandler;
-           _mouseLeaveHandler = val;
-           return combobox;
+             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 utilRebind(combobox, dispatch$1, 'on');
+         validation.type = type;
+         return validation;
        }
 
-       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);
-       };
-
-       // hide class, which sets display=none, and a d3 transition for opacity.
-       // this will cause blinking when called repeatedly, so check that the
-       // value actually changes between calls.
-
-       function uiToggle(show, callback) {
-         return function (selection) {
-           selection.style('opacity', show ? 0 : 1).classed('hide', false).transition().style('opacity', show ? 1 : 0).on('end', function () {
-             select(this).classed('hide', !show).style('opacity', null);
-             if (callback) callback.apply(this);
-           });
-         };
-       }
+       function validationCrossingWays(context) {
+         var type = 'crossing_ways'; // returns the way or its parent relation, whichever has a useful feature type
 
-       function uiDisclosure(context, key, expandedDefault) {
-         var dispatch$1 = dispatch('toggled');
+         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 _expanded;
+             for (var i = 0; i < parentRels.length; i++) {
+               var rel = parentRels[i];
 
-         var _label = utilFunctor('');
+               if (getFeatureType(rel, graph) !== null) {
+                 return rel;
+               }
+             }
+           }
 
-         var _updatePreference = true;
+           return way;
+         }
 
-         var _content = function _content() {};
+         function hasTag(tags, key) {
+           return tags[key] !== undefined && tags[key] !== 'no';
+         }
 
-         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 taggedAsIndoor(tags) {
+           return hasTag(tags, 'indoor') || hasTag(tags, 'level') || tags.highway === 'corridor';
+         }
 
-           var hideToggle = selection.selectAll('.hide-toggle-' + key).data([0]); // enter
+         function allowsBridge(featureType) {
+           return featureType === 'highway' || featureType === 'railway' || featureType === 'waterway';
+         }
 
-           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
+         function allowsTunnel(featureType) {
+           return featureType === 'highway' || featureType === 'railway' || featureType === 'waterway';
+         } // discard
 
-           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
 
-           wrap = wrap.enter().append('div').attr('class', 'disclosure-wrap disclosure-wrap-' + key).merge(wrap).classed('hide', !_expanded);
+         var ignoredBuildings = {
+           demolished: true,
+           dismantled: true,
+           proposed: true,
+           razed: true
+         };
 
-           if (_expanded) {
-             wrap.call(_content);
-           }
+         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
 
-           function toggle(d3_event) {
-             d3_event.preventDefault();
-             _expanded = !_expanded;
+           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;
+         }
 
-             if (_updatePreference) {
-               corePreferences('disclosure.' + key + '.expanded', _expanded);
-             }
+         function isLegitCrossing(tags1, featureType1, tags2, featureType2) {
+           // assume 0 by default
+           var level1 = tags1.level || '0';
+           var level2 = tags2.level || '0';
 
-             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 (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
 
-             if (_expanded) {
-               wrap.call(_content);
-             }
 
-             dispatch$1.call('toggled', this, _expanded);
-           }
-         };
+           var layer1 = tags1.layer || '0';
+           var layer2 = tags2.layer || '0';
 
-         disclosure.label = function (val) {
-           if (!arguments.length) return _label;
-           _label = utilFunctor(val);
-           return disclosure;
-         };
+           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
 
-         disclosure.expanded = function (val) {
-           if (!arguments.length) return _expanded;
-           _expanded = val;
-           return disclosure;
-         };
+             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;
 
-         disclosure.updatePreference = function (val) {
-           if (!arguments.length) return _updatePreference;
-           _updatePreference = val;
-           return disclosure;
-         };
+           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
 
-         disclosure.content = function (val) {
-           if (!arguments.length) return _content;
-           _content = val;
-           return disclosure;
-         };
+             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 utilRebind(disclosure, dispatch$1, 'on');
-       }
 
-       // Can be labeled and collapsible.
+           if (featureType1 === 'waterway' && featureType2 === 'highway' && tags2.man_made === 'pier') return true;
+           if (featureType2 === 'waterway' && featureType1 === 'highway' && tags1.man_made === 'pier') return true;
 
-       function uiSection(id, context) {
-         var _classes = utilFunctor('');
+           if (featureType1 === 'building' || featureType2 === 'building') {
+             // for building crossings, different layers are enough
+             if (layer1 !== layer2) return true;
+           }
 
-         var _shouldDisplay;
+           return false;
+         } // highway values for which we shouldn't recommend connecting to waterways
 
-         var _content;
 
-         var _disclosure;
+         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 _label;
+         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';
 
-         var _expandedByDefault = utilFunctor(true);
+           if (featureType1 === featureType2) {
+             if (featureType1 === 'highway') {
+               var entity1IsPath = osmPathHighwayTagValues[entity1.tags.highway];
+               var entity2IsPath = osmPathHighwayTagValues[entity2.tags.highway];
 
-         var _disclosureContent;
+               if ((entity1IsPath || entity2IsPath) && entity1IsPath !== entity2IsPath) {
+                 // one feature is a path but not both
+                 var roadFeature = entity1IsPath ? entity2 : entity1;
 
-         var _disclosureExpanded;
+                 if (nonCrossingHighways[roadFeature.tags.highway]) {
+                   // don't mark path connections with certain roads as crossings
+                   return {};
+                 }
 
-         var _containerSelection = select(null);
+                 var pathFeature = entity1IsPath ? entity1 : entity2;
 
-         var section = {
-           id: id
-         };
+                 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
 
-         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;
-         };
+                 return bothLines ? {
+                   highway: 'crossing'
+                 } : {};
+               }
 
-         section.expandedByDefault = function (val) {
-           if (!arguments.length) return _expandedByDefault;
-           _expandedByDefault = utilFunctor(val);
-           return section;
-         };
+               return {};
+             }
 
-         section.shouldDisplay = function (val) {
-           if (!arguments.length) return _shouldDisplay;
-           _shouldDisplay = utilFunctor(val);
-           return section;
-         };
+             if (featureType1 === 'waterway') return {};
+             if (featureType1 === 'railway') return {};
+           } else {
+             var featureTypes = [featureType1, featureType2];
 
-         section.content = function (val) {
-           if (!arguments.length) return _content;
-           _content = val;
-           return section;
-         };
+             if (featureTypes.indexOf('highway') !== -1) {
+               if (featureTypes.indexOf('railway') !== -1) {
+                 if (!bothLines) return {};
+                 var isTram = entity1.tags.railway === 'tram' || entity2.tags.railway === 'tram';
 
-         section.disclosureContent = function (val) {
-           if (!arguments.length) return _disclosureContent;
-           _disclosureContent = val;
-           return section;
-         };
+                 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
 
-         section.disclosureExpanded = function (val) {
-           if (!arguments.length) return _disclosureExpanded;
-           _disclosureExpanded = val;
-           return section;
-         }; // may be called multiple times
+                   return {
+                     railway: 'crossing'
+                   };
+                 } else {
+                   // path-tram connections use this tag
+                   if (isTram) return {
+                     railway: 'tram_level_crossing'
+                   }; // other road-rail connections use this tag
 
+                   return {
+                     railway: 'level_crossing'
+                   };
+                 }
+               }
 
-         section.render = function (selection) {
-           _containerSelection = selection.selectAll('.section-' + id).data([0]);
+               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;
 
-           var sectionEnter = _containerSelection.enter().append('div').attr('class', 'section section-' + id + ' ' + (_classes && _classes() || ''));
+                 if (highwaysDisallowingFords[entity1.tags.highway] || highwaysDisallowingFords[entity2.tags.highway]) {
+                   // do not allow fords on major highways
+                   return null;
+                 }
 
-           _containerSelection = sectionEnter.merge(_containerSelection);
+                 return bothLines ? {
+                   ford: 'yes'
+                 } : {};
+               }
+             }
+           }
 
-           _containerSelection.call(renderContent);
-         };
+           return null;
+         }
 
-         section.reRender = function () {
-           _containerSelection.call(renderContent);
-         };
+         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
 
-         section.selection = function () {
-           return _containerSelection;
-         };
+           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 = {};
 
-         section.disclosure = function () {
-           return _disclosure;
-         }; // may be called multiple times
+           for (i = 0; i < way1Nodes.length - 1; i++) {
+             n1 = way1Nodes[i];
+             n2 = way1Nodes[i + 1];
+             extent = geoExtent([[Math.min(n1.loc[0], n2.loc[0]), Math.min(n1.loc[1], n2.loc[1])], [Math.max(n1.loc[0], n2.loc[0]), Math.max(n1.loc[1], n2.loc[1])]]); // Optimize by only checking overlapping segments, not every segment
+             // of overlapping ways
 
+             segmentInfos = tree.waySegments(extent, graph);
 
-         function renderContent(selection) {
-           if (_shouldDisplay) {
-             var shouldDisplay = _shouldDisplay();
+             for (j = 0; j < segmentInfos.length; j++) {
+               segment2Info = segmentInfos[j]; // don't check for self-intersection in this validation
 
-             selection.classed('hide', !shouldDisplay);
+               if (segment2Info.wayId === way1.id) continue; // skip if this way was already checked and only one issue is needed
 
-             if (!shouldDisplay) {
-               selection.html('');
-               return;
-             }
-           }
+               if (checkedSingleCrossingWays[segment2Info.wayId]) continue; // mark this way as checked even if there are no crossings
 
-           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);
-             }
+               comparedWays[segment2Info.wayId] = true;
+               way2 = graph.hasEntity(segment2Info.wayId);
+               if (!way2) continue;
+               taggedFeature2 = getFeatureWithFeatureTypeTagsForWay(way2, graph); // only check crossing highway, waterway, building, and railway
 
-             if (_disclosureExpanded !== undefined) {
-               _disclosure.expanded(_disclosureExpanded);
+               way2FeatureType = getFeatureType(taggedFeature2, graph);
 
-               _disclosureExpanded = undefined;
-             }
+               if (way2FeatureType === null || isLegitCrossing(taggedFeature1.tags, way1FeatureType, taggedFeature2.tags, way2FeatureType)) {
+                 continue;
+               } // create only one issue for building crossings
 
-             selection.call(_disclosure);
-             return;
-           }
 
-           if (_content) {
-             selection.call(_content);
-           }
-         }
+               oneOnly = way1FeatureType === 'building' || way2FeatureType === 'building';
+               nAId = segment2Info.nodes[0];
+               nBId = segment2Info.nodes[1];
 
-         return section;
-       }
+               if (nAId === n1.id || nAId === n2.id || nBId === n1.id || nBId === n2.id) {
+                 // n1 or n2 is a connection node; skip
+                 continue;
+               }
 
-       // {
-       //   key: 'string',     // required
-       //   value: 'string'    // optional
-       // }
-       //   -or-
-       // {
-       //   qid: 'string'      // brand wikidata  (e.g. 'Q37158')
-       // }
-       //
+               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 uiTagReference(what) {
-         var wikibase = what.qid ? services.wikidata : services.osmWikibase;
-         var tagReference = {};
+               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
+                 });
 
-         var _button = select(null);
+                 if (oneOnly) {
+                   checkedSingleCrossingWays[way2.id] = true;
+                   break;
+                 }
+               }
+             }
+           }
 
-         var _body = select(null);
+           return edgeCrossInfos;
+         }
 
-         var _loaded;
+         function waysToCheck(entity, graph) {
+           var featureType = getFeatureType(entity, graph);
+           if (!featureType) return [];
 
-         var _showing;
+           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
 
-         function load() {
-           if (!wikibase) return;
+                 if (entity && array.indexOf(entity) === -1) {
+                   array.push(entity);
+                 }
+               }
 
-           _button.classed('tag-reference-loading', true);
+               return array;
+             }, []);
+           }
 
-           wikibase.getDocs(what, gotDocs);
+           return [];
          }
 
-         function gotDocs(err, docs) {
-           _body.html('');
+         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
 
-           if (!docs || !docs.title) {
-             _body.append('p').attr('class', 'tag-reference-description').html(_t.html('inspector.no_documentation_key'));
+           var wayIndex, crossingIndex, crossings;
 
-             done();
-             return;
-           }
+           for (wayIndex in ways) {
+             crossings = findCrossingsByWay(ways[wayIndex], graph, tree);
 
-           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();
+             for (crossingIndex in crossings) {
+               issues.push(createIssue(crossings[crossingIndex], graph));
+             }
            }
 
-           _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'));
+           return issues;
+         };
 
-           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 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;
 
+             if (type1 === type2) {
+               return utilDisplayLabel(way1Info.way, graph) > utilDisplayLabel(way2Info.way, graph);
+             } else if (type1 === 'waterway') {
+               return true;
+             } else if (type2 === 'waterway') {
+               return false;
+             }
 
-           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'));
+             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 done() {
-           _loaded = true;
+           if (connectionTags && (isCrossingIndoors || isCrossingTunnels || isCrossingBridges)) {
+             crossingTypeID += '_connectable';
+           } // Differentiate based on the loc rounded to 4 digits, since two ways can cross multiple times.
 
-           _button.classed('tag-reference-loading', false);
 
-           _body.classed('expanded', true).transition().duration(200).style('max-height', '200px').style('opacity', '1');
+           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 = [];
 
-           _showing = true;
+               if (connectionTags) {
+                 fixes.push(makeConnectWaysFix(this.data.connectionTags));
+               }
 
-           _button.selectAll('svg.icon use').each(function () {
-             var iconUse = select(this);
+               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
 
-             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 skipTunnelFix = otherFeatureType === 'waterway' && selectedFeatureType !== 'waterway';
 
-           _showing = false;
+                 if (allowsTunnel(selectedFeatureType) && !skipTunnelFix) {
+                   fixes.push(makeAddBridgeOrTunnelFix('add_a_tunnel', 'temaki-tunnel', 'tunnel'));
+                 }
+               } // repositioning the features is always an option
 
-           _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');
+               fixes.push(new validationIssueFix({
+                 icon: 'iD-operation-move',
+                 title: _t.html('issues.fix.reposition_features.title')
+               }));
+               return fixes;
              }
            });
+
+           function showReference(selection) {
+             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.crossing_ways.' + crossingTypeID + '.reference'));
+           }
          }
 
-         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);
+         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;
 
-           _button.on('click', function (d3_event) {
-             d3_event.stopPropagation();
-             d3_event.preventDefault();
-             this.blur(); // avoid keeping focus on the button - #4641
+               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];
+               }
 
-             if (_showing) {
-               hide();
-             } else if (_loaded) {
-               done();
-             } else {
-               load();
-             }
-           });
-         };
+               var crossingLoc = this.issue.loc;
+               var projection = context.projection;
 
-         tagReference.body = function (selection) {
-           var itemID = what.qid || what.key + '-' + (what.value || '');
-           _body = selection.selectAll('.tag-reference-body').data([itemID], function (d) {
-             return d;
-           });
+               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
 
-           _body.exit().remove();
+                 var structLengthMeters = crossedWay && crossedWay.tags.width && parseFloat(crossedWay.tags.width);
 
-           _body = _body.enter().append('div').attr('class', 'tag-reference-body').style('max-height', '0').style('opacity', '0').merge(_body);
+                 if (!structLengthMeters) {
+                   // if no explicit width is set, approximate the width based on the tags
+                   structLengthMeters = crossedWay && crossedWay.impliedLineWidthMeters();
+                 }
 
-           if (_showing === false) {
-             hide();
-           }
-         };
+                 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;
+                 }
 
-         tagReference.showing = function (val) {
-           if (!arguments.length) return _showing;
-           _showing = val;
-           return tagReference;
-         };
+                 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
 
-         return tagReference;
-       }
+                 structLengthMeters = structLengthMeters / 2 / Math.sin(crossingAngle) * 2; // add padding since the structure must extend past the edges of the crossed feature
 
-       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'
-         }];
+                 structLengthMeters += 4; // clamp the length to a reasonable range
 
-         var _tagView = corePreferences('raw-tag-editor-view') || 'list'; // 'list, 'text'
+                 structLengthMeters = Math.min(Math.max(structLengthMeters, 4), 50);
 
+                 function geomToProj(geoPoint) {
+                   return [geoLonToMeters(geoPoint[0], geoPoint[1]), geoLatToMeters(geoPoint[1])];
+                 }
 
-         var _readOnlyTags = []; // the keys in the order we want them to display
+                 function projToGeom(projPoint) {
+                   var lat = geoMetersToLat(projPoint[1]);
+                   return [geoMetersToLon(projPoint[0], lat), lat];
+                 }
 
-         var _orderedKeys = [];
-         var _showBlank = false;
-         var _pendingChange = null;
+                 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);
 
-         var _state;
+                 function locSphericalDistanceFromCrossingLoc(angle, distanceMeters) {
+                   var lengthSphericalMeters = distanceMeters * linearToSphericalMetersRatio;
+                   return projToGeom([projectedCrossingLoc[0] + Math.cos(angle) * lengthSphericalMeters, projectedCrossingLoc[1] + Math.sin(angle) * lengthSphericalMeters]);
+                 }
 
-         var _presets;
+                 var endpointLocGetter1 = function endpointLocGetter1(lengthMeters) {
+                   return locSphericalDistanceFromCrossingLoc(projectedAngle, lengthMeters);
+                 };
 
-         var _tags;
+                 var endpointLocGetter2 = function endpointLocGetter2(lengthMeters) {
+                   return locSphericalDistanceFromCrossingLoc(projectedAngle + Math.PI, lengthMeters);
+                 }; // avoid creating very short edges from splitting too close to another node
 
-         var _entityIDs;
 
-         var _didInteract = false;
+                 var minEdgeLengthMeters = 0.55; // decide where to bound the structure along the way, splitting as necessary
 
-         function interacted() {
-           _didInteract = true;
-         }
+                 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
 
-         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
+                   var crossingToEdgeEndDistance = geoSphericalDistance(crossingLoc, endNode.loc);
 
-           var all = Object.keys(_tags).sort();
-           var missingKeys = utilArrayDifference(all, _orderedKeys);
+                   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;
+                           }
+                         }
+                       });
+                     });
 
-           for (var i in missingKeys) {
-             _orderedKeys.push(missingKeys[i]);
-           } // assemble row data
+                     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
 
-           var rowData = _orderedKeys.map(function (key, i) {
-             return {
-               index: i,
-               key: key,
-               value: _tags[key]
-             };
-           }); // append blank row last, if necessary
 
+                   if (!newNode) newNode = endNode;
+                   var splitAction = actionSplit([newNode.id]).limitWays(resultWayIDs); // only split selected or created ways
+                   // do the split
 
-           if (!rowData.length || _showBlank) {
-             _showBlank = false;
-             rowData.push({
-               index: rowData.length,
-               key: '',
-               value: ''
-             });
-           } // View Options
+                   graph = splitAction(graph);
 
+                   if (splitAction.getCreatedWayIDs().length) {
+                     resultWayIDs.push(splitAction.getCreatedWayIDs()[0]);
+                   }
 
-           var options = wrap.selectAll('.raw-tag-options').data([0]);
-           options.exit().remove();
-           var optionsEnter = options.enter().insert('div', ':first-child').attr('class', 'raw-tag-options');
-           var optionEnter = optionsEnter.selectAll('.raw-tag-option').data(availableViews, function (d) {
-             return d.id;
-           }).enter();
-           optionEnter.append('button').attr('class', function (d) {
-             return 'raw-tag-option raw-tag-option-' + d.id + (_tagView === d.id ? ' selected' : '');
-           }).attr('title', function (d) {
-             return _t('icons.' + d.id);
-           }).on('click', function (d3_event, d) {
-             _tagView = d.id;
-             corePreferences('raw-tag-editor-view', d.id);
-             wrap.selectAll('.raw-tag-option').classed('selected', function (datum) {
-               return datum === d;
-             });
-             wrap.selectAll('.tag-text').classed('hide', d.id !== 'text').each(setTextareaHeight);
-             wrap.selectAll('.tag-list, .add-row').classed('hide', d.id !== 'list');
-           }).each(function (d) {
-             select(this).call(svgIcon(d.icon));
-           }); // View as Text
+                   return newNode;
+                 }
 
-           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
+                 var structEndNode1 = determineEndpoint(edge, edgeNodes[1], endpointLocGetter1);
+                 var structEndNode2 = determineEndpoint([edgeNodes[0].id, structEndNode1.id], edgeNodes[0], endpointLocGetter2);
+                 var structureWay = resultWayIDs.map(function (id) {
+                   return graph.entity(id);
+                 }).find(function (way) {
+                   return way.nodes.indexOf(structEndNode1.id) !== -1 && way.nodes.indexOf(structEndNode2.id) !== -1;
+                 });
+                 var tags = Object.assign({}, structureWay.tags); // copy tags
 
-           var 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
+                 if (bridgeOrTunnel === 'bridge') {
+                   tags.bridge = 'yes';
+                   tags.layer = '1';
+                 } else {
+                   var tunnelValue = 'yes';
 
-           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 (getFeatureType(structureWay, graph) === 'waterway') {
+                     // use `tunnel=culvert` for waterways by default
+                     tunnelValue = 'culvert';
+                   }
 
-           addRowEnter.append('div').attr('class', 'space-buttons'); // preserve space
-           // Tag list items
+                   tags.tunnel = tunnelValue;
+                   tags.layer = '-1';
+                 } // apply the structure tags to the way
 
-           var items = list.selectAll('.tag-row').data(rowData, function (d) {
-             return d.key;
-           });
-           items.exit().each(unbind).remove(); // Enter
 
-           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
+                 graph = actionChangeTags(structureWay.id, tags)(graph);
+                 return graph;
+               };
 
-           items = items.merge(itemsEnter).sort(function (a, b) {
-             return a.index - b.index;
+               context.perform(action, _t('issues.fix.' + fixTitleID + '.annotation'));
+               context.enter(modeSelect(context, resultWayIDs));
+             }
            });
-           items.each(function (d) {
-             var row = select(this);
-             var key = row.select('input.key'); // propagate bound data
+         }
 
-             var value = row.select('input.value'); // propagate bound data
+         function makeConnectWaysFix(connectionTags) {
+           var fixTitleID = 'connect_features';
 
-             if (_entityIDs && taginfo && _state !== 'hover') {
-               bindTypeahead(key, value);
-             }
+           if (connectionTags.ford) {
+             fixTitleID = 'connect_using_ford';
+           }
 
-             var referenceOptions = {
-               key: d.key
-             };
+           return new validationIssueFix({
+             icon: 'iD-icon-crossing',
+             title: _t.html('issues.fix.' + fixTitleID + '.title'),
+             onClick: function onClick(context) {
+               var loc = this.issue.loc;
+               var connectionTags = this.issue.data.connectionTags;
+               var edges = this.issue.data.edges;
+               context.perform(function actionConnectCrossingWays(graph) {
+                 // create the new node for the points
+                 var node = osmNode({
+                   loc: loc,
+                   tags: connectionTags
+                 });
+                 graph = graph.replace(node);
+                 var nodesToMerge = [node.id];
+                 var mergeThresholdInMeters = 0.75;
+                 edges.forEach(function (edge) {
+                   var edgeNodes = [graph.entity(edge[0]), graph.entity(edge[1])];
+                   var nearby = geoSphericalClosestNode(edgeNodes, loc); // if there is already a suitable node nearby, use that
+                   // use the node if node has no interesting tags or if it is a crossing node #8326
 
-             if (typeof d.value === 'string') {
-               referenceOptions.value = d.value;
-             }
+                   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);
+                   }
+                 });
 
-             var reference = uiTagReference(referenceOptions);
+                 if (nodesToMerge.length > 1) {
+                   // if we're using nearby nodes, merge them with the new node
+                   graph = actionMergeNodes(nodesToMerge, loc)(graph);
+                 }
 
-             if (_state === 'hover') {
-               reference.showing(false);
+                 return graph;
+               }, _t('issues.fix.connect_crossing_features.annotation'));
              }
-
-             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
          }
 
-         function isReadOnly(d) {
-           for (var i = 0; i < _readOnlyTags.length; i++) {
-             if (d.key.match(_readOnlyTags[i]) !== null) {
-               return true;
-             }
-           }
+         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
 
-           return false;
-         }
+               var layer = tags.layer && Number(tags.layer);
 
-         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');
-         }
+               if (layer && !isNaN(layer)) {
+                 if (higherOrLower === 'higher') {
+                   layer += 1;
+                 } else {
+                   layer -= 1;
+                 }
+               } else {
+                 if (higherOrLower === 'higher') {
+                   layer = 1;
+                 } else {
+                   layer = -1;
+                 }
+               }
 
-         function stringify(s) {
-           return JSON.stringify(s).slice(1, -1); // without leading/trailing "
+               tags.layer = layer.toString();
+               context.perform(actionChangeTags(entity.id, tags), _t('operations.change_tags.annotation'));
+             }
+           });
          }
 
-         function unstringify(s) {
-           var leading = '';
-           var trailing = '';
+         validation.type = type;
+         return validation;
+       }
 
-           if (s.length < 1 || s.charAt(0) !== '"') {
-             leading = '"';
-           }
+       function behaviorDrawWay(context, wayID, mode, startGraph) {
+         var dispatch = dispatch$8('rejectedSelfIntersection');
+         var behavior = behaviorDraw(context); // Must be set by `drawWay.nodeIndex` before each install of this behavior.
 
-           if (s.length < 2 || s.charAt(s.length - 1) !== '"' || s.charAt(s.length - 1) === '"' && s.charAt(s.length - 2) === '\\') {
-             trailing = '"';
-           }
+         var _nodeIndex;
 
-           return JSON.parse(leading + s + trailing);
-         }
+         var _origWay;
 
-         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');
+         var _wayGeometry;
 
-           if (_state !== 'hover' && str.length) {
-             return str + '\n';
-           }
+         var _headNodeID;
 
-           return str;
-         }
+         var _annotation;
 
-         function textChanged() {
-           var newText = this.value.trim();
-           var newTags = {};
-           newText.split('\n').forEach(function (row) {
-             var m = row.match(/^\s*([^=]+)=(.*)$/);
+         var _pointerHasMoved = false; // The osmNode to be placed.
+         // This is temporary and just follows the mouse cursor until an "add" event occurs.
 
-             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 _drawNode;
 
-             if (change.newVal === '*' && typeof change.oldVal !== 'string') return;
+         var _didResolveTempEdit = false;
 
-             if (change.type === '-') {
-               _pendingChange[change.key] = undefined;
-             } else if (change.type === '+') {
-               _pendingChange[change.key] = change.newVal || '';
-             }
+         function createDrawNode(loc) {
+           // don't make the draw node until we actually need it
+           _drawNode = osmNode({
+             loc: loc
            });
-
-           if (Object.keys(_pendingChange).length === 0) {
-             _pendingChange = null;
-             return;
-           }
-
-           scheduleChange();
+           context.pauseChangeDispatch();
+           context.replace(function actionAddDrawNode(graph) {
+             // add the draw node to the graph and insert it into the way
+             var way = graph.entity(wayID);
+             return graph.replace(_drawNode).replace(way.addNode(_drawNode.id, _nodeIndex));
+           }, _annotation);
+           context.resumeChangeDispatch();
+           setActiveElements();
          }
 
-         function 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 removeDrawNode() {
+           context.pauseChangeDispatch();
+           context.replace(function actionDeleteDrawNode(graph) {
+             var way = graph.entity(wayID);
+             return graph.replace(way.removeNode(_drawNode.id)).remove(_drawNode);
+           }, _annotation);
+           _drawNode = undefined;
+           context.resumeChangeDispatch();
          }
 
-         function bindTypeahead(key, value) {
-           if (isReadOnly(key.datum())) return;
-
-           if (Array.isArray(value.datum().value)) {
-             value.call(uiCombobox(context, 'tag-value').minItems(1).fetcher(function (value, callback) {
-               var keyString = utilGetSetValue(key);
-               if (!_tags[keyString]) return;
-
-               var data = _tags[keyString].filter(Boolean).map(function (tagValue) {
-                 return {
-                   value: tagValue,
-                   title: tagValue
-                 };
-               });
+         function keydown(d3_event) {
+           if (d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
+             if (context.surface().classed('nope')) {
+               context.surface().classed('nope-suppressed', true);
+             }
 
-               callback(data);
-             }));
-             return;
+             context.surface().classed('nope', false).classed('nope-disabled', true);
            }
+         }
 
-           var geometry = context.graph().geometry(_entityIDs[0]);
-           key.call(uiCombobox(context, 'tag-key').fetcher(function (value, callback) {
-             taginfo.keys({
-               debounce: true,
-               geometry: geometry,
-               query: value
-             }, function (err, data) {
-               if (!err) {
-                 var filtered = data.filter(function (d) {
-                   return _tags[d.value] === undefined;
-                 });
-                 callback(sort(value, filtered));
-               }
-             });
-           }));
-           value.call(uiCombobox(context, 'tag-value').fetcher(function (value, callback) {
-             taginfo.values({
-               debounce: true,
-               key: utilGetSetValue(key),
-               geometry: geometry,
-               query: value
-             }, function (err, data) {
-               if (!err) callback(sort(value, data));
-             });
-           }));
-
-           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 keyup(d3_event) {
+           if (d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
+             if (context.surface().classed('nope-suppressed')) {
+               context.surface().classed('nope', true);
              }
 
-             return sameletter.concat(other);
+             context.surface().classed('nope-suppressed', false).classed('nope-disabled', false);
            }
          }
 
-         function unbind() {
-           var row = select(this);
-           row.selectAll('input.key').call(uiCombobox.off, context);
-           row.selectAll('input.value').call(uiCombobox.off, context);
-         }
+         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 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 (_pendingChange && _pendingChange.hasOwnProperty(kOld) && _pendingChange[kOld] === undefined) return;
-           var kNew = context.cleanTagKey(this.value.trim()); // allow no change if the key should be readonly
+         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;
 
-           if (isReadOnly({
-             key: kNew
-           })) {
-             this.value = kOld;
-             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);
+
+             if (choice) {
+               loc = choice.loc;
+             }
            }
 
-           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
+           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.selection().selectAll('.tag-list input.value').each(function (d) {
-               if (d.key === kNew) {
-                 // send focus to that other value combo instead
-                 var input = select(this).node();
-                 input.focus();
-                 input.select();
-               }
-             });
-             return;
-           }
 
-           var row = this.parentNode.parentNode;
-           var inputVal = select(row).selectAll('input.value');
-           var vNew = context.cleanTagValue(utilGetSetValue(inputVal));
-           _pendingChange = _pendingChange || {};
+         function checkGeometry(includeDrawNode) {
+           var nopeDisabled = context.surface().classed('nope-disabled');
+           var isInvalid = isInvalidGeometry(includeDrawNode);
 
-           if (kOld) {
-             _pendingChange[kOld] = undefined;
+           if (nopeDisabled) {
+             context.surface().classed('nope', false).classed('nope-suppressed', isInvalid);
+           } else {
+             context.surface().classed('nope', isInvalid).classed('nope-suppressed', false);
            }
+         }
 
-           _pendingChange[kNew] = vNew; // update the ordered key index so this row doesn't change position
+         function isInvalidGeometry(includeDrawNode) {
+           var testNode = _drawNode; // we only need to test the single way we're drawing
 
-           var existingKeyIndex = _orderedKeys.indexOf(kOld);
+           var parentWay = context.graph().entity(wayID);
+           var nodes = context.graph().childNodes(parentWay).slice(); // shallow copy
 
-           if (existingKeyIndex !== -1) _orderedKeys[existingKeyIndex] = kNew;
-           d.key = kNew; // update datum to avoid exit/enter on tag update
+           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;
+             }
+           }
 
-           d.value = vNew;
-           this.value = kNew;
-           utilGetSetValue(inputVal, vNew);
-           scheduleChange();
+           return testNode && geoHasSelfIntersections(nodes, testNode.id);
          }
 
-         function valueChange(d3_event, d) {
-           if (isReadOnly(d)) return; // exit if this is a multiselection and no value was entered
+         function undone() {
+           // undoing removed the temp edit
+           _didResolveTempEdit = true;
+           context.pauseChangeDispatch();
+           var nextMode;
 
-           if (typeof d.value !== 'string' && !this.value) return; // exit if we are currently about to delete this row anyway - #6366
+           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
 
-           if (_pendingChange && _pendingChange.hasOwnProperty(d.key) && _pendingChange[d.key] === undefined) return;
-           _pendingChange = _pendingChange || {};
-           _pendingChange[d.key] = context.cleanTagValue(this.value);
-           scheduleChange();
-         }
+             nextMode = mode;
+           } // clear the redo stack by adding and removing a blank edit
 
-         function removeTag(d3_event, d) {
-           if (isReadOnly(d)) return;
 
-           if (d.key === '') {
-             // removing the blank row
-             _showBlank = false;
-             section.reRender();
-           } else {
-             // remove the key from the ordered key index
-             _orderedKeys = _orderedKeys.filter(function (key) {
-               return key !== d.key;
-             });
-             _pendingChange = _pendingChange || {};
-             _pendingChange[d.key] = undefined;
-             scheduleChange();
-           }
+           context.perform(actionNoop());
+           context.pop(1);
+           context.resumeChangeDispatch();
+           context.enter(nextMode);
          }
 
-         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);
+         function setActiveElements() {
+           if (!_drawNode) return;
+           context.surface().selectAll('.' + _drawNode.id).classed('active', true);
          }
 
-         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$1.call('change', this, entityIDs, _pendingChange);
-             _pendingChange = null;
-           }, 10);
+         function resetToStartGraph() {
+           while (context.graph() !== startGraph) {
+             context.pop();
+           }
          }
 
-         section.state = function (val) {
-           if (!arguments.length) return _state;
+         var drawWay = function drawWay(surface) {
+           _drawNode = undefined;
+           _didResolveTempEdit = false;
+           _origWay = context.entity(wayID);
 
-           if (_state !== val) {
-             _orderedKeys = [];
-             _state = val;
+           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];
            }
 
-           return section;
-         };
+           _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.
 
-         section.presets = function (val) {
-           if (!arguments.length) return _presets;
-           _presets = val;
+           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 (_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);
+         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);
          };
 
-         section.tags = function (val) {
-           if (!arguments.length) return _tags;
-           _tags = val;
-           return section;
-         };
+         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);
+           }
 
-         section.entityIDs = function (val) {
-           if (!arguments.length) return _entityIDs;
+           checkGeometry(true
+           /* includeDrawNode */
+           );
 
-           if (!_entityIDs || !val || !utilArrayIdentical(_entityIDs, val)) {
-             _entityIDs = val;
-             _orderedKeys = [];
+           if (d && d.properties && d.properties.nope || context.surface().classed('nope')) {
+             if (!_pointerHasMoved) {
+               // prevent the temporary draw node from appearing on touch devices
+               removeDrawNode();
+             }
+
+             dispatch.call('rejectedSelfIntersection', this);
+             return; // can't click here
            }
 
-           return section;
-         }; // pass an array of regular expressions to test against the tag key
+           context.pauseChangeDispatch();
+           doAdd(); // we just replaced the temporary edit with the real one
 
+           _didResolveTempEdit = true;
+           context.resumeChangeDispatch();
+           context.enter(mode);
+         } // Accept the current position of the drawing node
 
-         section.readOnlyTags = function (val) {
-           if (!arguments.length) return _readOnlyTags;
-           _readOnlyTags = val;
-           return section;
-         };
 
-         return utilRebind(section, dispatch$1, 'on');
-       }
+         drawWay.add = function (loc, d) {
+           attemptAdd(d, loc, function () {// don't need to do anything extra
+           });
+         }; // Connect the way to an existing way
 
-       function uiDataEditor(context) {
-         var dataHeader = uiDataHeader();
-         var rawTagEditor = uiSectionRawTagEditor('custom-data-tag-editor', context).expandedByDefault(true).readOnlyTags([/./]);
 
-         var _datum;
+         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
 
-         function dataEditor(selection) {
-           var header = selection.selectAll('.header').data([0]);
-           var headerEnter = header.enter().append('div').attr('class', 'header fillL');
-           headerEnter.append('button').attr('class', 'close').on('click', function () {
-             context.enter(modeBrowse(context));
-           }).call(svgIcon('#iD-icon-close'));
-           headerEnter.append('h3').html(_t.html('map_data.title'));
-           var body = selection.selectAll('.body').data([0]);
-           body = body.enter().append('div').attr('class', 'body').merge(body);
-           var editor = body.selectAll('.data-editor').data([0]); // enter/update
 
-           editor.enter().append('div').attr('class', 'modal-section data-editor').merge(editor).call(dataHeader.datum(_datum));
-           var rte = body.selectAll('.raw-tag-editor').data([0]); // enter/update
+         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;
+           }
 
-           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);
-         }
+           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.
 
-         dataEditor.datum = function (val) {
-           if (!arguments.length) return _datum;
-           _datum = val;
-           return this;
-         };
 
-         return dataEditor;
-       }
+         drawWay.finish = function () {
+           checkGeometry(false
+           /* includeDrawNode */
+           );
 
-       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
+           if (context.surface().classed('nope')) {
+             dispatch.call('rejectedSelfIntersection', this);
+             return; // can't click here
+           }
 
-         function selectData(d3_event, drawn) {
-           var selection = context.surface().selectAll('.layer-mapdata .data' + selectedDatum.__featurehash__);
+           context.pauseChangeDispatch(); // remove the temporary edit
 
-           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;
+           context.pop(1);
+           _didResolveTempEdit = true;
+           context.resumeChangeDispatch();
+           var way = context.hasEntity(wayID);
 
-             if (drawn && source && (source.type === 'pointermove' || source.type === 'mousemove' || source.type === 'touchmove')) {
-               context.enter(modeBrowse(context));
-             }
-           } else {
-             selection.classed('selected', true);
+           if (!way || way.isDegenerate()) {
+             drawWay.cancel();
+             return;
            }
-         }
 
-         function esc() {
-           if (context.container().select('.combobox').size()) 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));
-         }
+         };
 
-         mode.zoomToSelected = function () {
-           var extent = geoExtent(d3_geoBounds(selectedDatum));
-           context.map().centerZoomEase(extent.center(), context.map().trimmedExtentZoom(extent));
+         drawWay.nodeIndex = function (val) {
+           if (!arguments.length) return _nodeIndex;
+           _nodeIndex = val;
+           return drawWay;
          };
 
-         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
+         drawWay.activeID = function () {
+           if (!arguments.length) return _drawNode && _drawNode.id; // no assign
 
-           var extent = geoExtent(d3_geoBounds(selectedDatum));
-           sidebar.expand(sidebar.intersects(extent));
-           context.map().on('drawn.select-data', selectData);
+           return drawWay;
          };
 
-         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();
+         return utilRebind(drawWay, dispatch, 'on');
+       }
+
+       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;
 
-         return mode;
-       }
+         mode.enter = function () {
+           behavior.nodeIndex(affix === 'prefix' ? 0 : undefined);
+           context.install(behavior);
+         };
 
-       function uiImproveOsmComments() {
-         var _qaItem;
+         mode.exit = function () {
+           context.uninstall(behavior);
+         };
 
-         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
+         mode.selectedIDs = function () {
+           return [wayID];
+         };
 
-           services.improveOSM.getComments(_qaItem).then(function (d) {
-             if (!d.comments) return; // nothing to do here
+         mode.activeID = function () {
+           return behavior && behavior.activeID() || [];
+         };
 
-             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);
+         return mode;
+       }
 
-               if (osm && d.username) {
-                 selection = selection.append('a').attr('class', 'comment-author-link').attr('href', osm.userURL(d.username)).attr('target', '_blank');
-               }
+       function validationDisconnectedWay() {
+         var type = 'disconnected_way';
 
-               selection.html(function (d) {
-                 return d.username;
-               });
-             });
-             metadataEnter.append('div').attr('class', 'comment-date').html(function (d) {
-               return _t.html('note.status.commented', {
-                 when: localeDateString(d.timestamp)
-               });
-             });
-             mainEnter.append('div').attr('class', 'comment-text').append('p').html(function (d) {
-               return d.text;
-             });
-           })["catch"](function (err) {
-             console.log(err); // eslint-disable-line no-console
-           });
+         function isTaggedAsHighway(entity) {
+           return osmRoutableHighwayTagValues[entity.tags.highway];
          }
 
-         function localeDateString(s) {
-           if (!s) return null;
-           var options = {
-             day: 'numeric',
-             month: 'short',
-             year: 'numeric'
-           };
-           var d = new Date(s * 1000); // timestamp is served in seconds, date takes ms
+         var 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
+           })];
 
-           if (isNaN(d.getTime())) return null;
-           return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
-         }
+           function makeFixes(context) {
+             var fixes = [];
+             var singleEntity = this.entityIds.length === 1 && context.hasEntity(this.entityIds[0]);
 
-         issueComments.issue = function (val) {
-           if (!arguments.length) return _qaItem;
-           _qaItem = val;
-           return issueComments;
-         };
+             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);
+               }
 
-         return issueComments;
-       }
+               if (!fixes.length) {
+                 fixes.push(new validationIssueFix({
+                   title: _t.html('issues.fix.connect_feature.title')
+                 }));
+               }
 
-       function uiImproveOsmDetails(context) {
-         var _qaItem;
+               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]);
 
-         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 (!operation.disabled()) {
+                     operation();
+                   }
+                 }
+               }));
+             } else {
+               fixes.push(new validationIssueFix({
+                 title: _t.html('issues.fix.connect_features.title')
+               }));
+             }
 
-           return _t.html("QA.improveOSM.error_types.".concat(issueKey, ".description"), d.replacements);
-         }
+             return fixes;
+           }
 
-         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
+           function showReference(selection) {
+             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.disconnected_way.routable.reference'));
+           }
 
-           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..
+           function routingIslandForEntity(entity) {
+             var routingIsland = new Set(); // the interconnected routable features
 
-           var relatedEntities = [];
-           descriptionEnter.selectAll('.error_entity_link, .error_object_link').attr('href', '#').each(function () {
-             var link = select(this);
-             var isObjectLink = link.classed('error_object_link');
-             var entityID = isObjectLink ? utilEntityRoot(_qaItem.objectType) + _qaItem.objectId : this.textContent;
-             var entity = context.hasEntity(entityID);
-             relatedEntities.push(entityID); // Add click handler
+             var waysToCheck = []; // the queue of remaining routable ways to traverse
 
-             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');
+             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 (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;
+             }
 
-               if (!osmlayer.enabled()) {
-                 osmlayer.enabled(true);
-               }
+             while (waysToCheck.length) {
+               var wayToCheck = waysToCheck.pop();
+               var childNodes = graph.childNodes(wayToCheck);
 
-               context.map().centerZoom(_qaItem.loc, 20);
+               for (var i in childNodes) {
+                 var vertex = childNodes[i];
 
-               if (entity) {
-                 context.enter(modeSelect(context, [entityID]));
-               } else {
-                 context.loadEntity(entityID, function () {
-                   context.enter(modeSelect(context, [entityID]));
-                 });
-               }
-             }); // Replace with friendly name if possible
-             // (The entity may not yet be loaded into the graph)
+                 if (isConnectedVertex(vertex)) {
+                   // found a link to the wider network, not a routing island
+                   return null;
+                 }
 
-             if (entity) {
-               var name = utilDisplayName(entity); // try to use common name
+                 if (isRoutableNode(vertex)) {
+                   routingIsland.add(vertex);
+                 }
 
-               if (!name && !isObjectLink) {
-                 var preset = _mainPresetIndex.match(entity, context.graph());
-                 name = preset && !preset.isFallback() && preset.name(); // fallback to preset name
+                 queueParentWays(vertex);
                }
+             } // no network link found, this is a routing island, return its members
 
-               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
-         }
+             return routingIsland;
+           }
 
-         improveOsmDetails.issue = function (val) {
-           if (!arguments.length) return _qaItem;
-           _qaItem = val;
-           return improveOsmDetails;
-         };
+           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
 
-         return improveOsmDetails;
-       }
+             if (vertex.tags.entrance && vertex.tags.entrance !== 'no') return true;
+             if (vertex.tags.amenity === 'parking_entrance') return true;
+             return false;
+           }
 
-       function uiImproveOsmHeader() {
-         var _qaItem;
+           function isRoutableNode(node) {
+             // treat elevators as distinct features in the highway network
+             if (node.tags.highway === 'elevator') return true;
+             return false;
+           }
 
-         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
+           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;
+             });
+           }
 
-           return _t.html("QA.improveOSM.error_types.".concat(issueKey, ".title"), d.replacements);
-         }
+           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
 
-         function improveOsmHeader(selection) {
-           var header = selection.selectAll('.qa-header').data(_qaItem ? [_qaItem] : [], function (d) {
-             return "".concat(d.id, "-").concat(d.status || 0);
-           });
-           header.exit().remove();
-           var headerEnter = header.enter().append('div').attr('class', 'qa-header');
-           var svgEnter = headerEnter.append('div').attr('class', 'qa-header-icon').classed('new', function (d) {
-             return d.id < 0;
-           }).append('svg').attr('width', '20px').attr('height', '30px').attr('viewbox', '0 0 20 30').attr('class', function (d) {
-             return "preset-icon-28 qaItem ".concat(d.service, " itemId-").concat(d.id, " itemType-").concat(d.itemType);
-           });
-           svgEnter.append('polygon').attr('fill', 'currentColor').attr('class', 'qaItem-fill').attr('points', '16,3 4,3 1,6 1,17 4,20 7,20 10,27 13,20 16,20 19,17.033 19,6');
-           svgEnter.append('use').attr('class', 'icon-annotation').attr('width', '13px').attr('height', '13px').attr('transform', 'translate(3.5, 5)').attr('xlink:href', function (d) {
-             var picon = d.icon;
+                 var map = context.map();
 
-             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);
-         }
+                 if (!context.editable() || !map.trimmedExtent().contains(vertex.loc)) {
+                   map.zoomToEase(vertex);
+                 }
 
-         improveOsmHeader.issue = function (val) {
-           if (!arguments.length) return _qaItem;
-           _qaItem = val;
-           return improveOsmHeader;
+                 context.enter(modeDrawLine(context, wayId, context.graph(), 'line', way.affix(vertexId), true));
+               }
+             });
+           }
          };
 
-         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 validationFormatting() {
+         var type = 'invalid_format';
 
-         var _qaItem;
+         var validation = function validation(entity) {
+           var issues = [];
 
-         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);
-         }
+           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
 
-         function improveOsmSaveSection(selection) {
-           var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
+             return !email || valid_email.test(email);
+           }
+           /*
+           function isSchemePresent(url) {
+               var valid_scheme = /^https?:\/\//i;
+               return (!url || valid_scheme.test(url));
+           }
+           */
 
-           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
 
-           saveSection.exit().remove(); // enter
+           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 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 (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);
+             });
 
-           function changeInput() {
-             var input = select(this);
-             var val = input.property('value').trim();
+             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' : ''
+               }));
+             }
+           }
 
-             if (val === '') {
-               val = undefined;
-             } // store the unsaved comment with the issue itself
+           return issues;
+         };
 
+         validation.type = type;
+         return validation;
+       }
 
-             _qaItem = _qaItem.update({
-               newComment: val
-             });
-             var qaService = services.improveOSM;
+       function validationHelpRequest(context) {
+         var type = 'help_request';
 
-             if (qaService) {
-               qaService.replaceItem(_qaItem);
-             }
+         var validation = function checkFixmeTag(entity) {
+           if (!entity.tags.fixme) return []; // don't flag fixmes on features added by the user
 
-             saveSection.call(qaSaveButtons);
+           if (entity.version === undefined) 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 [];
            }
-         }
 
-         function qaSaveButtons(selection) {
-           var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
+           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]
+           })];
 
-           var buttonSection = selection.selectAll('.buttons').data(isSelected ? [_qaItem] : [], function (d) {
-             return d.status + d.id;
-           }); // exit
+           function showReference(selection) {
+             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.fixme_tag.reference'));
+           }
+         };
 
-           buttonSection.exit().remove(); // enter
+         validation.type = type;
+         return validation;
+       }
 
-           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
+       function validationImpossibleOneway() {
+         var type = 'impossible_oneway';
 
-           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 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 qaService = services.improveOSM;
+           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;
+           }
 
-             if (qaService) {
-               qaService.postUpdate(d, function (err, item) {
-                 return dispatch$1.call('change', item);
-               });
+           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;
+               }
              }
-           });
-           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;
+             return false;
+           }
 
-             if (qaService) {
-               d.newStatus = 'SOLVED';
-               qaService.postUpdate(d, function (err, item) {
-                 return dispatch$1.call('change', item);
-               });
+           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;
+               }
              }
-           });
-           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;
+             return false;
+           }
 
-             if (qaService) {
-               d.newStatus = 'INVALID';
-               qaService.postUpdate(d, function (err, item) {
-                 return dispatch$1.call('change', item);
-               });
+           function isConnectedViaOtherTypes(way, node) {
+             var wayType = typeForWay(way);
+
+             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;
+               }
              }
-           });
-         } // NOTE: Don't change method name until UI v3 is merged
 
+             return graph.parentWays(node).some(function (parentWay) {
+               if (parentWay.id === way.id) return false;
 
-         improveOsmEditor.error = function (val) {
-           if (!arguments.length) return _qaItem;
-           _qaItem = val;
-           return improveOsmEditor;
-         };
+               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
 
-         return utilRebind(improveOsmEditor, dispatch$1, 'on');
-       }
+                 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 uiKeepRightDetails(context) {
-         var _qaItem;
+                   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;
+               }
 
-         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
+               return false;
+             });
+           }
 
-           var detail = _t.html("QA.keepRight.errorTypes.".concat(itemType, ".description"), replacements);
+           function issuesForNode(way, nodeID) {
+             var isFirst = nodeID === way.first();
+             var wayType = typeForWay(way); // ignore if this way is self-connected at this node
 
-           if (detail === unknown) {
-             detail = _t.html("QA.keepRight.errorTypes.".concat(parentIssueType, ".description"), replacements);
-           }
+             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
 
-           return detail;
-         }
+             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
 
-         function keepRightDetails(selection) {
-           var details = selection.selectAll('.error-details').data(_qaItem ? [_qaItem] : [], function (d) {
-             return "".concat(d.id, "-").concat(d.status || 0);
-           });
-           details.exit().remove();
-           var detailsEnter = details.enter().append('div').attr('class', 'error-details qa-details-container'); // description
+             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
 
-           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 (attachedOneways.length < attachedWaysOfSameType.length) return [];
 
-           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 (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 [];
+             }
 
-             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 placement = isFirst ? 'start' : 'end',
+                 messageID = wayType + '.',
+                 referenceID = wayType + '.';
 
-               if (!osmlayer.enabled()) {
-                 osmlayer.enabled(true);
-               }
+             if (wayType === 'waterway') {
+               messageID += 'connected.' + placement;
+               referenceID += 'connected';
+             } else {
+               messageID += placement;
+               referenceID += placement;
+             }
 
-               context.map().centerZoomEase(_qaItem.loc, 20);
+             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 (entity) {
-                 context.enter(modeSelect(context, [entityID]));
-               } else {
-                 context.loadEntity(entityID, function () {
-                   context.enter(modeSelect(context, [entityID]));
-                 });
-               }
-             }); // Replace with friendly name if possible
-             // (The entity may not yet be loaded into the graph)
+                 if (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 (entity) {
-               var name = utilDisplayName(entity); // try to use common name
+                 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);
+                     }
+                   }));
+                 }
 
-               if (!name && !isObjectLink) {
-                 var preset = _mainPresetIndex.match(entity, context.graph());
-                 name = preset && !preset.isFallback() && preset.name(); // fallback to preset name
-               }
+                 return fixes;
+               },
+               loc: node.loc
+             })];
 
-               if (name) {
-                 this.innerText = name;
-               }
+             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'));
+               };
              }
-           }); // Don't hide entities related to this issue - #5880
-
-           context.features().forceVisible(relatedEntities);
-           context.map().pan([0, 0]); // trigger a redraw
-         }
-
-         keepRightDetails.issue = function (val) {
-           if (!arguments.length) return _qaItem;
-           _qaItem = val;
-           return keepRightDetails;
+           }
          };
 
-         return keepRightDetails;
-       }
-
-       function uiKeepRightHeader() {
-         var _qaItem;
-
-         function issueTitle(d) {
-           var itemType = d.itemType,
-               parentIssueType = d.parentIssueType;
-           var unknown = _t.html('inspector.unknown');
-           var replacements = d.replacements || {};
-           replacements["default"] = unknown; // special key `default` works as a fallback string
-
-           var title = _t.html("QA.keepRight.errorTypes.".concat(itemType, ".title"), replacements);
+         function continueDrawing(way, vertex, context) {
+           // make sure the vertex is actually visible and editable
+           var map = context.map();
 
-           if (title === unknown) {
-             title = _t.html("QA.keepRight.errorTypes.".concat(parentIssueType, ".title"), replacements);
+           if (!context.editable() || !map.trimmedExtent().contains(vertex.loc)) {
+             map.zoomToEase(vertex);
            }
 
-           return title;
+           context.enter(modeDrawLine(context, way.id, context.graph(), 'line', way.affix(vertex.id), true));
          }
 
-         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;
+         validation.type = type;
+         return validation;
+       }
+
+       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(), true
+                   /* verbose */
+                   )
+                 }) : '';
+               },
+               reference: getReference(invalidSource.id),
+               entityIds: [entity.id],
+               dynamicFixes: function dynamicFixes() {
+                 return [new validationIssueFix({
+                   title: _t.html('issues.fix.remove_proprietary_data.title')
+                 })];
+               }
+             }));
            });
-           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);
-         }
+           return issues;
 
-         keepRightHeader.issue = function (val) {
-           if (!arguments.length) return _qaItem;
-           _qaItem = val;
-           return keepRightHeader;
+           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'));
+             };
+           }
          };
 
-         return keepRightHeader;
+         validation.type = type;
+         return validation;
        }
 
-       function uiViewOnKeepRight() {
-         var _qaItem;
+       function validationMaprules() {
+         var type = 'maprules';
 
-         function viewOnKeepRight(selection) {
-           var url;
+         var validation = function checkMaprules(entity, graph) {
+           if (!services.maprules) return [];
+           var rules = services.maprules.validationRules();
+           var issues = [];
 
-           if (services.keepRight && _qaItem instanceof QAItem) {
-             url = services.keepRight.issueURL(_qaItem);
+           for (var i = 0; i < rules.length; i++) {
+             var rule = rules[i];
+             rule.findIssues(entity, graph, issues);
            }
 
-           var link = selection.selectAll('.view-on-keepRight').data(url ? [url] : []); // exit
-
-           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').html(_t.html('inspector.view_on_keepRight'));
-         }
-
-         viewOnKeepRight.what = function (val) {
-           if (!arguments.length) return _qaItem;
-           _qaItem = val;
-           return viewOnKeepRight;
+           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 validationMismatchedGeometry() {
+         var type = 'mismatched_geometry';
 
-         var _qaItem;
+         function tagSuggestingLineIsArea(entity) {
+           if (entity.type !== 'way' || entity.isClosed()) return null;
+           var tagSuggestingArea = entity.tagSuggestingArea();
 
-         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));
-         }
+           if (!tagSuggestingArea) {
+             return null;
+           }
 
-         function keepRightSaveSection(selection) {
-           var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
+           var asLine = _mainPresetIndex.matchTags(tagSuggestingArea, 'line');
+           var asArea = _mainPresetIndex.matchTags(tagSuggestingArea, 'area');
 
-           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
+           if (asLine && asArea && asLine === asArea) {
+             // these tags also allow lines and making this an area wouldn't matter
+             return null;
+           }
 
-           saveSection.exit().remove(); // enter
+           return tagSuggestingArea;
+         }
 
-           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 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
 
-           saveSection = saveSectionEnter.merge(saveSection).call(qaSaveButtons);
+           if (firstToLastDistanceMeters < 0.75) {
+             testNodes = nodes.slice(); // shallow copy
 
-           function changeInput() {
-             var input = select(this);
-             var val = input.property('value').trim();
+             testNodes.pop();
+             testNodes.push(testNodes[0]); // make sure this will not create a self-intersection
 
-             if (val === _qaItem.comment) {
-               val = undefined;
-             } // store the unsaved comment with the issue itself
+             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
 
 
-             _qaItem = _qaItem.update({
-               newComment: val
-             });
-             var qaService = services.keepRight;
+           testNodes = nodes.slice(); // shallow copy
 
-             if (qaService) {
-               qaService.replaceItem(_qaItem); // update keepright cache
-             }
+           testNodes.push(testNodes[0]); // make sure this will not create a self-intersection
 
-             saveSection.call(qaSaveButtons);
+           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'));
+             };
            }
          }
 
-         function qaSaveButtons(selection) {
-           var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
-
-           var buttonSection = selection.selectAll('.buttons').data(isSelected ? [_qaItem] : [], function (d) {
-             return d.status + d.id;
-           }); // exit
-
-           buttonSection.exit().remove(); // enter
-
-           var buttonEnter = buttonSection.enter().append('div').attr('class', 'buttons');
-           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
-
-             var qaService = services.keepRight;
-
-             if (qaService) {
-               qaService.postUpdate(d, function (err, item) {
-                 return dispatch$1.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
-
-             var qaService = services.keepRight;
+         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
 
-             if (qaService) {
-               d.newStatus = 'ignore_t'; // ignore temporarily (item fixed)
+                   for (var key in tagSuggestingArea) {
+                     delete tags[key];
+                   }
 
-               qaService.postUpdate(d, function (err, item) {
-                 return dispatch$1.call('change', item);
-               });
+                   context.perform(actionChangeTags(entityId, tags), _t('issues.fix.remove_tag.annotation'));
+                 }
+               }));
+               return fixes;
              }
            });
-           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').html(_t.html('issues.tag_suggests_area.reference'));
+           }
+         }
 
-               qaService.postUpdate(d, function (err, item) {
-                 return dispatch$1.call('change', item);
-               });
-             }
-           });
-         } // NOTE: Don't change method name until UI v3 is merged
+         function vertexPointIssue(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
 
-         keepRightEditor.error = function (val) {
-           if (!arguments.length) return _qaItem;
-           _qaItem = val;
-           return keepRightEditor;
-         };
+           if (entity.isOnAddressLine(graph)) return null;
+           var geometry = entity.geometry(graph);
+           var allowedGeometries = osmNodeGeometriesForTags(entity.tags);
 
-         return utilRebind(keepRightEditor, dispatch$1, 'on');
-       }
+           if (geometry === 'point' && !allowedGeometries.point && allowedGeometries.vertex) {
+             return new validationIssue({
+               type: type,
+               subtype: 'vertex_as_point',
+               severity: 'warning',
+               message: function message(context) {
+                 var entity = context.hasEntity(this.entityIds[0]);
+                 return entity ? _t.html('issues.vertex_as_point.message', {
+                   feature: utilDisplayLabel(entity, 'vertex', true
+                   /* verbose */
+                   )
+                 }) : '';
+               },
+               reference: function showReference(selection) {
+                 selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.vertex_as_point.reference'));
+               },
+               entityIds: [entity.id]
+             });
+           } else if (geometry === 'vertex' && !allowedGeometries.vertex && allowedGeometries.point) {
+             return new validationIssue({
+               type: type,
+               subtype: 'point_as_vertex',
+               severity: 'warning',
+               message: function message(context) {
+                 var entity = context.hasEntity(this.entityIds[0]);
+                 return entity ? _t.html('issues.point_as_vertex.message', {
+                   feature: utilDisplayLabel(entity, 'point', true
+                   /* verbose */
+                   )
+                 }) : '';
+               },
+               reference: function showReference(selection) {
+                 selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.point_as_vertex.reference'));
+               },
+               entityIds: [entity.id],
+               dynamicFixes: extractPointDynamicFixes
+             });
+           }
 
-       function uiOsmoseDetails(context) {
-         var _qaItem;
+           return null;
+         }
 
-         function issueString(d, type) {
-           if (!d) return ''; // Issue strings are cached from Osmose API
+         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 targetGeom = targetGeoms.find(function (nodeGeom) {
+             var asSource = _mainPresetIndex.matchTags(entity.tags, sourceGeom);
+             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;
+           }
 
-           var s = services.osmose.getStrings(d.itemType);
-           return type in s ? s[type] : '';
+           return new validationIssue({
+             type: type,
+             subtype: subtype,
+             severity: 'warning',
+             message: function message(context) {
+               var entity = context.hasEntity(this.entityIds[0]);
+               return entity ? _t.html('issues.' + referenceId + '.message', {
+                 feature: utilDisplayLabel(entity, targetGeom, true
+                 /* verbose */
+                 )
+               }) : '';
+             },
+             reference: function showReference(selection) {
+               selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.mismatched_geometry.reference'));
+             },
+             entityIds: [entity.id],
+             dynamicFixes: dynamicFixes
+           });
          }
 
-         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
+         function lineToAreaDynamicFixes(context) {
+           var convertOnClick;
+           var entityId = this.entityIds[0];
+           var entity = context.entity(entityId);
+           var tags = Object.assign({}, entity.tags); // shallow copy
 
-           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)
+           delete tags.area;
 
+           if (!osmTagSuggestingArea(tags)) {
+             // if removing the area tag would make this a line, offer that as a quick fix
+             convertOnClick = function convertOnClick(context) {
+               var entityId = this.issue.entityIds[0];
+               var entity = context.entity(entityId);
+               var tags = Object.assign({}, entity.tags); // shallow copy
 
-           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 (tags.area) {
+                 delete tags.area;
+               }
 
-           if (issueString(_qaItem, 'fix')) {
-             var _div = detailsEnter.append('div').attr('class', 'qa-details-subsection');
+               context.perform(actionChangeTags(entityId, tags), _t('issues.fix.convert_to_line.annotation'));
+             };
+           }
 
-             _div.append('h4').html(_t.html('QA.osmose.fix_title'));
+           return [new validationIssueFix({
+             icon: 'iD-icon-line',
+             title: _t.html('issues.fix.convert_to_line.title'),
+             onClick: convertOnClick
+           })];
+         }
 
-             _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 extractPointDynamicFixes(context) {
+           var entityId = this.entityIds[0];
+           var extractOnClick = null;
 
+           if (!context.hasHiddenConnections(entityId)) {
+             extractOnClick = function extractOnClick(context) {
+               var entityId = this.issue.entityIds[0];
+               var action = actionExtract(entityId, context.projection);
+               context.perform(action, _t('operations.extract.annotation', {
+                 n: 1
+               })); // re-enter mode to trigger updates
 
-           if (issueString(_qaItem, 'trap')) {
-             var _div2 = detailsEnter.append('div').attr('class', 'qa-details-subsection');
+               context.enter(modeSelect(context, [action.getExtractedNodeID()]));
+             };
+           }
 
-             _div2.append('h4').html(_t.html('QA.osmose.trap_title'));
+           return [new validationIssueFix({
+             icon: 'iD-operation-extract',
+             title: _t.html('issues.fix.extract_point.title'),
+             onClick: extractOnClick
+           })];
+         }
 
-             _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
+         function unclosedMultipolygonPartIssues(entity, graph) {
+           if (entity.type !== 'relation' || !entity.isMultipolygon() || entity.isDegenerate() || // cannot determine issues for incompletely-downloaded relations
+           !entity.isComplete(graph)) return [];
+           var sequences = osmJoinWays(entity.members, graph);
+           var issues = [];
 
+           for (var i in sequences) {
+             var sequence = sequences[i];
+             if (!sequence.nodes) continue;
+             var firstNode = sequence.nodes[0];
+             var lastNode = sequence.nodes[sequence.nodes.length - 1]; // part is closed if the first and last nodes are the same
 
-           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 (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 (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
+           return issues;
 
-             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
+           function showReference(selection) {
+             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.unclosed_multipolygon_part.reference'));
+           }
+         }
+
+         var validation = function checkMismatchedGeometry(entity, graph) {
+           var vertexPoint = vertexPointIssue(entity, graph);
+           if (vertexPoint) return [vertexPoint];
+           var lineAsArea = lineTaggedAsAreaIssue(entity);
+           if (lineAsArea) return [lineAsArea];
+           var mismatch = otherMismatchIssue(entity, graph);
+           if (mismatch) return [mismatch];
+           return unclosedMultipolygonPartIssues(entity, graph);
+         };
 
+         validation.type = type;
+         return validation;
+       }
 
-             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
+       function validationMissingRole() {
+         var type = 'missing_role';
 
-               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 validation = function checkMissingRole(entity, graph) {
+           var issues = [];
 
-                 if (!osmlayer.enabled()) {
-                   osmlayer.enabled(true);
-                 }
+           if (entity.type === 'way') {
+             graph.parentRelations(entity).forEach(function (relation) {
+               if (!relation.isMultipolygon()) return;
+               var member = relation.memberById(entity.id);
 
-                 context.map().centerZoom(d.loc, 20);
+               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 (entity) {
-                   context.enter(modeSelect(context, [entityID]));
-                 } else {
-                   context.loadEntity(entityID, function () {
-                     context.enter(modeSelect(context, [entityID]));
-                   });
-                 }
-               }); // Replace with friendly name if possible
-               // (The entity may not yet be loaded into the graph)
+               if (way && isMissingRole(member)) {
+                 issues.push(makeIssue(way, entity, member));
+               }
+             });
+           }
 
-               if (entity) {
-                 var name = utilDisplayName(entity); // try to use common name
+           return issues;
+         };
 
-                 if (!name) {
-                   var preset = _mainPresetIndex.match(entity, context.graph());
-                   name = preset && !preset.isFallback() && preset.name(); // fallback to preset name
-                 }
+         function isMissingRole(member) {
+           return !member.role || !member.role.trim().length;
+         }
 
-                 if (name) {
-                   this.innerText = name;
+         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
+                   }));
                  }
-               }
-             }); // Don't hide entities related to this issue - #5880
-
-             context.features().forceVisible(d.elems);
-             context.map().pan([0, 0]); // trigger a redraw
-           })["catch"](function (err) {
-             console.log(err); // eslint-disable-line no-console
+               })];
+             }
            });
+
+           function showReference(selection) {
+             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.missing_role.multipolygon.reference'));
+           }
          }
 
-         osmoseDetails.issue = function (val) {
-           if (!arguments.length) return _qaItem;
-           _qaItem = val;
-           return osmoseDetails;
-         };
+         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 osmoseDetails;
+         validation.type = type;
+         return validation;
        }
 
-       function uiOsmoseHeader() {
-         var _qaItem;
+       function validationMissingTag(context) {
+         var type = 'missing_tag';
 
-         function issueTitle(d) {
-           var unknown = _t('inspector.unknown');
-           if (!d) return unknown; // Issue titles supplied by Osmose
+         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;
+             });
+           });
 
-           var s = services.osmose.getStrings(d.itemType);
-           return 'title' in s ? s.title : unknown;
-         }
+           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);
+           }
 
-         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;
+           return entityDescriptiveKeys.length > 0;
+         }
 
-             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);
+         function isUnknownRoad(entity) {
+           return entity.type === 'way' && entity.tags.highway === 'road';
          }
 
-         osmoseHeader.issue = function (val) {
-           if (!arguments.length) return _qaItem;
-           _qaItem = val;
-           return osmoseHeader;
-         };
+         function isUntypedRelation(entity) {
+           return entity.type === 'relation' && !entity.tags.type;
+         }
 
-         return osmoseHeader;
-       }
+         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
 
-       function uiViewOnOsmose() {
-         var _qaItem;
+           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
 
-         function viewOnOsmose(selection) {
-           var url;
 
-           if (services.osmose && _qaItem instanceof QAItem) {
-             url = services.osmose.itemURL(_qaItem);
+           if (!subtype && isUnknownRoad(entity)) {
+             subtype = 'highway_classification';
            }
 
-           var link = selection.selectAll('.view-on-osmose').data(url ? [url] : []); // exit
+           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..
 
-           link.exit().remove(); // enter
+           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();
 
-           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'));
-         }
+               if (!disabledReasonID) {
+                 deleteOnClick = function deleteOnClick(context) {
+                   var id = this.issue.entityIds[0];
+                   var operation = operationDelete(context, [id]);
 
-         viewOnOsmose.what = function (val) {
-           if (!arguments.length) return _qaItem;
-           _qaItem = val;
-           return viewOnOsmose;
+                   if (!operation.disabled()) {
+                     operation();
+                   }
+                 };
+               }
+
+               fixes.push(new validationIssueFix({
+                 icon: 'iD-operation-delete',
+                 title: _t.html('issues.fix.delete_feature.title'),
+                 disabledReason: disabledReasonID ? _t('operations.delete.' + disabledReasonID + '.single') : undefined,
+                 onClick: deleteOnClick
+               }));
+               return fixes;
+             }
+           })];
+
+           function showReference(selection) {
+             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.' + referenceID + '.reference'));
+           }
          };
 
-         return viewOnOsmose;
+         validation.type = type;
+         return validation;
        }
 
-       function uiOsmoseEditor(context) {
-         var dispatch$1 = dispatch('change');
-         var qaDetails = uiOsmoseDetails(context);
-         var qaHeader = uiOsmoseHeader();
+       function validationOutdatedTags() {
+         var type = 'outdated_tags';
+         var _waitingForDeprecated = true;
 
-         var _qaItem;
+         var _dataDeprecated; // fetch deprecated tags
 
-         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));
-         }
 
-         function osmoseSaveSection(selection) {
-           var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
+         _mainFileFetcher.get('deprecated').then(function (d) {
+           return _dataDeprecated = d;
+         })["catch"](function () {
+           /* ignore */
+         })["finally"](function () {
+           return _waitingForDeprecated = false;
+         });
 
-           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 oldTagIssues(entity, graph) {
+           var oldTags = Object.assign({}, entity.tags); // shallow copy
 
-           saveSection.exit().remove(); // enter
+           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 saveSectionEnter = saveSection.enter().append('div').attr('class', 'qa-save save-section cf'); // update
+           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..
 
-           saveSection = saveSectionEnter.merge(saveSection).call(qaSaveButtons);
-         }
 
-         function qaSaveButtons(selection) {
-           var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
+           if (_dataDeprecated) {
+             var deprecatedTags = entity.deprecatedTags(_dataDeprecated);
 
-           var buttonSection = selection.selectAll('.buttons').data(isSelected ? [_qaItem] : [], function (d) {
-             return d.status + d.id;
-           }); // exit
+             if (deprecatedTags.length) {
+               deprecatedTags.forEach(function (tag) {
+                 graph = actionUpgradeTags(entity.id, tag.old, tag.replace)(graph);
+               });
+               entity = graph.entity(entity.id);
+             }
+           } // Add missing addTags from the detected preset
 
-           buttonSection.exit().remove(); // enter
 
-           var buttonEnter = buttonSection.enter().append('div').attr('class', 'buttons');
-           buttonEnter.append('button').attr('class', 'button close-button action');
-           buttonEnter.append('button').attr('class', 'button ignore-button action'); // update
+           var newTags = Object.assign({}, entity.tags); // shallow copy
 
-           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
+           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.
 
-             var qaService = services.osmose;
 
-             if (qaService) {
-               d.newStatus = 'done';
-               qaService.postUpdate(d, function (err, item) {
-                 return dispatch$1.call('change', item);
-               });
+           var nsi = services.nsi;
+           var waitingForNsi = false;
+
+           if (nsi) {
+             waitingForNsi = nsi.status() === 'loading';
+
+             if (!waitingForNsi) {
+               var loc = entity.extent(graph).center();
+               var result = nsi.upgradeTags(newTags, loc);
+
+               if (result) {
+                 newTags = result;
+                 subtype = 'noncanonical_brand';
+               }
              }
+           }
+
+           var issues = [];
+           issues.provisional = _waitingForDeprecated || waitingForNsi; // determine diff
+
+           var tagDiff = utilTagDiff(oldTags, newTags);
+           if (!tagDiff.length) return issues;
+           var isOnlyAddingTags = tagDiff.every(function (d) {
+             return d.type === '+';
            });
-           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
+           var prefix = '';
 
-             var qaService = services.osmose;
+           if (subtype === 'noncanonical_brand') {
+             prefix = 'noncanonical_brand.';
+           } else if (subtype === 'deprecated_tags' && isOnlyAddingTags) {
+             subtype = 'incomplete_tags';
+             prefix = 'incomplete.';
+           } // don't allow autofixing brand tags
 
-             if (qaService) {
-               d.newStatus = 'false';
-               qaService.postUpdate(d, function (err, item) {
-                 return dispatch$1.call('change', item);
-               });
+
+           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() {
+               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'));
+                 }
+               })];
              }
-           });
-         } // NOTE: Don't change method name until UI v3 is merged
+           }));
+           return issues;
 
+           function doUpgrade(graph) {
+             var currEntity = graph.hasEntity(entity.id);
+             if (!currEntity) return graph;
+             var newTags = Object.assign({}, currEntity.tags); // shallow copy
 
-         osmoseEditor.error = function (val) {
-           if (!arguments.length) return _qaItem;
-           _qaItem = val;
-           return osmoseEditor;
-         };
+             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);
+           }
 
-         return utilRebind(osmoseEditor, dispatch$1, 'on');
-       }
+           function showMessage(context) {
+             var currEntity = context.hasEntity(entity.id);
+             if (!currEntity) return '';
+             var messageID = "issues.outdated_tags.".concat(prefix, "message");
 
-       function modeSelectError(context, selectedErrorID, selectedErrorService) {
-         var mode = {
-           id: 'select-error',
-           button: 'browse'
-         };
-         var keybinding = utilKeybinding('select-error');
-         var errorService = services[selectedErrorService];
-         var errorEditor;
+             if (subtype === 'noncanonical_brand' && isOnlyAddingTags) {
+               messageID += '_incomplete';
+             }
 
-         switch (selectedErrorService) {
-           case 'improveOSM':
-             errorEditor = uiImproveOsmEditor(context).on('change', function () {
-               context.map().pan([0, 0]); // trigger a redraw
+             return _t.html(messageID, {
+               feature: utilDisplayLabel(currEntity, context.graph(), true
+               /* verbose */
+               )
+             });
+           }
 
-               var error = checkSelectedID();
-               if (!error) return;
-               context.ui().sidebar.show(errorEditor.error(error));
+           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;
              });
-             break;
+           }
+         }
 
-           case 'keepRight':
-             errorEditor = uiKeepRightEditor(context).on('change', function () {
-               context.map().pan([0, 0]); // trigger a redraw
+         function oldMultipolygonIssues(entity, graph) {
+           var multipolygon, outerWay;
 
-               var error = checkSelectedID();
-               if (!error) return;
-               context.ui().sidebar.show(errorEditor.error(error));
-             });
-             break;
+           if (entity.type === 'relation') {
+             outerWay = osmOldMultipolygonOuterMemberOfRelation(entity, graph);
+             multipolygon = entity;
+           } else if (entity.type === 'way') {
+             multipolygon = osmIsOldMultipolygonOuterMember(entity, graph);
+             outerWay = entity;
+           } else {
+             return [];
+           }
 
-           case 'osmose':
-             errorEditor = uiOsmoseEditor(context).on('change', function () {
-               context.map().pan([0, 0]); // trigger a redraw
+           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 error = checkSelectedID();
-               if (!error) return;
-               context.ui().sidebar.show(errorEditor.error(error));
+           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);
+           }
+
+           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 */
+               )
              });
-             break;
+           }
+
+           function showReference(selection) {
+             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.old_multipolygon.reference'));
+           }
          }
 
-         var behaviors = [behaviorBreathe(), behaviorHover(context), behaviorSelect(context), behaviorLasso(context), modeDragNode(context).behavior, modeDragNote(context).behavior];
+         var validation = function checkOutdatedTags(entity, graph) {
+           var issues = oldMultipolygonIssues(entity, graph);
+           if (!issues.length) issues = oldTagIssues(entity, graph);
+           return issues;
+         };
 
-         function checkSelectedID() {
-           if (!errorService) return;
-           var error = errorService.getError(selectedErrorID);
+         validation.type = type;
+         return validation;
+       }
 
-           if (!error) {
-             context.enter(modeBrowse(context));
-           }
+       function validationPrivateData() {
+         var type = 'private_data'; // assume that some buildings are private
 
-           return error;
-         }
+         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
 
-         mode.zoomToSelected = function () {
-           if (!errorService) return;
-           var error = errorService.getError(selectedErrorID);
+         var publicKeys = {
+           amenity: true,
+           craft: true,
+           historic: true,
+           leisure: true,
+           office: true,
+           shop: true,
+           tourism: true
+         }; // these tags may contain personally identifying info
 
-           if (error) {
-             context.map().centerZoomEase(error.loc, 20);
-           }
+         var personalTags = {
+           'contact:email': true,
+           'contact:fax': true,
+           'contact:phone': true,
+           email: true,
+           fax: true,
+           phone: true
          };
 
-         mode.enter = function () {
-           var error = checkSelectedID();
-           if (!error) return;
-           behaviors.forEach(context.install);
-           keybinding.on(_t('inspector.zoom_to.key'), mode.zoomToSelected).on('⎋', esc, true);
-           select(document).call(keybinding);
-           selectError();
-           var sidebar = context.ui().sidebar;
-           sidebar.show(errorEditor.error(error));
-           context.map().on('drawn.select-error', selectError); // class the error as selected, or return to browse mode if the error is gone
+         var validation = function checkPrivateData(entity) {
+           var tags = entity.tags;
+           if (!tags.building || !privateBuildingValues[tags.building]) return [];
+           var keepTags = {};
 
-           function selectError(d3_event, drawn) {
-             if (!checkSelectedID()) return;
-             var selection = context.surface().selectAll('.itemId-' + selectedErrorID + '.' + selectedErrorService);
+           for (var k in tags) {
+             if (publicKeys[k]) return []; // probably a public feature
 
-             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 (!personalTags[k]) {
+               keepTags[k] = tags[k];
+             }
+           }
 
-               if (drawn && source && (source.type === 'pointermove' || source.type === 'mousemove' || source.type === 'touchmove')) {
-                 context.enter(modeBrowse(context));
-               }
-             } else {
-               selection.classed('selected', true);
-               context.selectedErrorID(selectedErrorID);
+           var 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);
            }
 
-           function esc() {
-             if (context.container().select('.combobox').size()) return;
-             context.enter(modeBrowse(context));
+           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())
+             });
            }
-         };
 
-         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 showReference(selection) {
+             var enter = selection.selectAll('.issue-reference').data([0]).enter();
+             enter.append('div').attr('class', 'issue-reference').html(_t.html('issues.private_data.reference'));
+             enter.append('strong').html(_t.html('issues.suggested'));
+             enter.append('table').attr('class', 'tagDiff-table').selectAll('.tagDiff-row').data(tagDiff).enter().append('tr').attr('class', 'tagDiff-row').append('td').attr('class', function (d) {
+               var klass = d.type === '+' ? 'add' : 'remove';
+               return 'tagDiff-cell tagDiff-cell-' + klass;
+             }).html(function (d) {
+               return d.display;
+             });
+           }
          };
 
-         return mode;
+         validation.type = type;
+         return validation;
        }
 
-       function behaviorSelect(context) {
-         var _tolerancePx = 4; // see also behaviorDrag
-
-         var _lastMouseEvent = null;
-         var _showMenu = false;
-         var _downPointers = {};
-         var _longPressTimeout = null;
-         var _lastInteractionType = null; // the id of the down pointer that's enabling multiselection while down
+       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.
 
-         var _multiselectionPointerId = null; // use pointer events on supported platforms; fallback to mouse events
+         function isGenericMatchInNsi(tags) {
+           var nsi = services.nsi;
 
-         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+           if (nsi) {
+             _waitingForNsi = nsi.status() === 'loading';
 
-         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 (!_waitingForNsi) {
+               return nsi.isGenericName(tags);
+             }
            }
 
-           if (d3_event.keyCode === 93 || // context menu key
-           d3_event.keyCode === 32) {
-             // spacebar
-             d3_event.preventDefault();
-           }
+           return false;
+         } // Test if the name is just the key or tag value (e.g. "park")
 
-           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
 
-           cancelLongPress();
+         function nameMatchesRawTag(lowercaseName, tags) {
+           for (var i = 0; i < keysToTestForGenericValues.length; i++) {
+             var key = keysToTestForGenericValues[i];
+             var val = tags[key];
 
-           if (d3_event.shiftKey) {
-             context.surface().classed('behavior-multiselect', true);
-           }
+             if (val) {
+               val = val.toLowerCase();
 
-           if (d3_event.keyCode === 32) {
-             // spacebar
-             if (!_downPointers.spacebar && _lastMouseEvent) {
-               cancelLongPress();
-               _longPressTimeout = window.setTimeout(didLongPress, 500, 'spacebar', 'spacebar');
-               _downPointers.spacebar = {
-                 firstEvent: _lastMouseEvent,
-                 lastEvent: _lastMouseEvent
-               };
+               if (key === lowercaseName || val === lowercaseName || key.replace(/\_/g, ' ') === lowercaseName || val.replace(/\_/g, ' ') === lowercaseName) {
+                 return true;
+               }
              }
            }
+
+           return false;
          }
 
-         function keyup(d3_event) {
-           cancelLongPress();
+         function isGenericName(name, tags) {
+           name = name.toLowerCase();
+           return nameMatchesRawTag(name, tags) || isGenericMatchInNsi(tags);
+         }
 
-           if (!d3_event.shiftKey) {
-             context.surface().classed('behavior-multiselect', false);
+         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'));
+                 }
+               })];
+             }
+           });
+
+           function showReference(selection) {
+             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.generic_name.reference'));
            }
+         }
 
-           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 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
 
-             if (pointer) {
-               delete _downPointers.spacebar;
-               if (pointer.done) return;
-               d3_event.preventDefault();
-               _lastInteractionType = 'spacebar';
-               click(pointer.firstEvent, pointer.lastEvent, 'spacebar');
+                   delete tags[nameKey];
+                   context.perform(actionChangeTags(entityId, tags), _t('issues.fix.remove_mistaken_name.annotation'));
+                 }
+               })];
              }
+           });
+
+           function showReference(selection) {
+             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.generic_name.reference'));
            }
          }
 
-         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
-           };
-         }
+         var validation = function checkGenericName(entity) {
+           var tags = entity.tags; // a generic name is allowed if it's a known brand or entity
 
-         function didLongPress(id, interactionType) {
-           var pointer = _downPointers[id];
-           if (!pointer) return;
+           var hasWikidata = !!tags.wikidata || !!tags['brand:wikidata'] || !!tags['operator:wikidata'];
+           if (hasWikidata) return [];
+           var issues = [];
+           var notNames = (tags['not:name'] || '').split(';');
 
-           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
+           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];
 
+             if (notNames.length) {
+               for (var i in notNames) {
+                 var notName = notNames[i];
 
-           _longPressTimeout = null;
-           _lastInteractionType = interactionType;
-           _showMenu = true;
-           click(pointer.firstEvent, pointer.lastEvent, id);
-         }
+                 if (notName && value === notName) {
+                   issues.push(makeIncorrectNameIssue(entity.id, key, value, langCode));
+                   continue;
+                 }
+               }
+             }
 
-         function pointermove(d3_event) {
-           var id = (d3_event.pointerId || 'mouse').toString();
+             if (isGenericName(value, tags)) {
+               issues.provisional = _waitingForNsi; // retry later if we are waiting on NSI to finish loading
 
-           if (_downPointers[id]) {
-             _downPointers[id].lastEvent = d3_event;
+               issues.push(makeGenericNameIssue(entity.id, key, value, langCode));
+             }
            }
 
-           if (!d3_event.pointerType || d3_event.pointerType === 'mouse') {
-             _lastMouseEvent = d3_event;
+           return issues;
+         };
 
-             if (_downPointers.spacebar) {
-               _downPointers.spacebar.lastEvent = d3_event;
-             }
-           }
-         }
+         validation.type = type;
+         return validation;
+       }
 
-         function pointerup(d3_event) {
-           var id = (d3_event.pointerId || 'mouse').toString();
-           var pointer = _downPointers[id];
-           if (!pointer) return;
-           delete _downPointers[id];
+       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
 
-           if (_multiselectionPointerId === id) {
-             _multiselectionPointerId = null;
-           }
+         var epsilon = 0.05;
+         var nodeThreshold = 10;
 
-           if (pointer.done) return;
-           click(pointer.firstEvent, d3_event, id);
+         function isBuilding(entity, graph) {
+           if (entity.type !== 'way' || entity.geometry(graph) !== 'area') return false;
+           return entity.tags.building && entity.tags.building !== 'no';
          }
 
-         function pointercancel(d3_event) {
-           var id = (d3_event.pointerId || 'mouse').toString();
-           if (!_downPointers[id]) return;
-           delete _downPointers[id];
+         var validation = function checkUnsquareWay(entity, graph) {
+           if (!isBuilding(entity, graph)) return []; // don't flag ways marked as physically unsquare
 
-           if (_multiselectionPointerId === id) {
-             _multiselectionPointerId = null;
+           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
+
+           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
+
+           var osm = services.osm;
+           if (!osm || nodes.some(function (node) {
+             return !osm.isDataLoaded(node.loc);
+           })) return []; // don't flag connected ways to avoid unresolvable unsquare loops
+
+           var hasConnectedSquarableWays = nodes.some(function (node) {
+             return graph.parentWays(node).some(function (way) {
+               if (way.id === entity.id) return false;
+               if (isBuilding(way, graph)) return true;
+               return graph.parentRelations(way).some(function (parentRelation) {
+                 return parentRelation.isMultipolygon() && parentRelation.tags.building && parentRelation.tags.building !== 'no';
+               });
+             });
+           });
+           if (hasConnectedSquarableWays) return []; // user-configurable square threshold
+
+           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 (!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
+             })];
            }
-         }
 
-         function contextmenu(d3_event) {
-           d3_event.preventDefault();
+           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
 
-           if (!+d3_event.clientX && !+d3_event.clientY) {
-             if (_lastMouseEvent) {
-               d3_event.sourceEvent = _lastMouseEvent;
-             } else {
-               return;
+                   context.perform(actionOrthogonalize(entityId, context.projection, undefined, degreeThreshold), _t('operations.orthogonalize.annotation.feature', {
+                     n: 1
+                   })); // run after the squaring transition (currently 150ms)
+
+                   window.setTimeout(function () {
+                     completionHandler();
+                   }, 175);
+                 }
+               })
+               /*
+               new validationIssueFix({
+                   title: t.html('issues.fix.tag_as_unsquare.title'),
+                   onClick: function(context) {
+                       var entityId = this.issue.entityIds[0];
+                       var entity = context.entity(entityId);
+                       var tags = Object.assign({}, entity.tags);  // shallow copy
+                       tags.nonsquare = 'yes';
+                       context.perform(
+                           actionChangeTags(entityId, tags),
+                           t('issues.fix.tag_as_unsquare.annotation')
+                       );
+                   }
+               })
+               */
+               ];
              }
-           } else {
-             _lastMouseEvent = d3_event;
-             _lastInteractionType = 'rightclick';
+           })];
+
+           function showReference(selection) {
+             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.unsquare_way.buildings.reference'));
            }
+         };
+
+         validation.type = type;
+         return validation;
+       }
+
+       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 _this = this;
+
+         var dispatch = dispatch$8('validated', 'focusedIssue');
+         var validator = utilRebind({}, dispatch, 'on');
+         var _rules = {};
+         var _disabledRules = {};
+
+         var _ignoredIssueIDs = new Set();
+
+         var _resolvedIssueIDs = new Set();
 
-           _showMenu = true;
-           click(d3_event, d3_event);
-         }
+         var _baseCache = validationCache('base'); // issues before any user edits
 
-         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.
 
-           var pointGetter = utilFastMouse(mapNode);
-           var p1 = pointGetter(firstEvent);
-           var p2 = pointGetter(lastEvent);
-           var dist = geoVecLength(p1, p2);
+         var _headCache = validationCache('head'); // issues after all user edits
 
-           if (dist > _tolerancePx || !mapContains(lastEvent)) {
-             resetProperties();
-             return;
-           }
 
-           var targetDatum = lastEvent.target.__data__;
-           var multiselectEntityId;
+         var _completeDiff = {}; // complete diff base -> head of what the user changed
 
-           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);
+         var _headIsCurrent = false;
 
-             if (selectPointerInfo) {
-               _multiselectionPointerId = selectPointerInfo.pointerId; // if the other feature isn't selected yet, make sure we select it
+         var _deferredRIC = new Set(); // Set( RequestIdleCallback handles )
 
-               multiselectEntityId = !selectPointerInfo.selected && selectPointerInfo.entityId;
-               _downPointers[selectPointerInfo.pointerId].done = true;
-             }
-           } // support multiselect if data is already selected
 
+         var _deferredST = new Set(); // Set( SetTimeout handles )
 
-           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);
 
-           processClick(targetDatum, isMultiselect, p2, multiselectEntityId);
+         var _headPromise; // Promise fulfilled when validation is performed up to headGraph snapshot
 
-           function mapContains(event) {
-             var rect = mapNode.getBoundingClientRect();
-             return event.clientX >= rect.left && event.clientX <= rect.right && event.clientY >= rect.top && event.clientY <= rect.bottom;
-           }
 
-           function pointerDownOnSelection(skipPointerId) {
-             var mode = context.mode();
-             var selectedIDs = mode.id === 'select' ? mode.selectedIDs() : [];
+         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 }
+         //
 
-             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
-               };
-             }
 
-             return null;
-           }
-         }
+         function parseHashParam(param) {
+           var result = [];
+           var rules = (param || '').split(',');
+           rules.forEach(function (rule) {
+             rule = rule.trim();
+             var parts = rule.split('/', 2); // "type/subtype"
+
+             var type = parts[0];
+             var subtype = parts[1] || '*';
+             if (!type || !subtype) return;
+             result.push({
+               type: makeRegExp(type),
+               subtype: makeRegExp(subtype)
+             });
+           });
+           return result;
 
-         function 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;
+           function makeRegExp(str) {
+             var escaped = str.replace(/[-\/\\^$+?.()|[\]{}]/g, '\\$&') // escape all reserved chars except for the '*'
+             .replace(/\*/g, '.*'); // treat a '*' like '.*'
 
-           if (datum && datum.type === 'midpoint') {
-             // treat targeting midpoints as if targeting the parent way
-             datum = datum.parents[0];
+             return new RegExp('^' + escaped + '$');
            }
+         } // `init()`
+         // Initialize the validator, called once on iD startup
+         //
 
-           var newMode;
 
-           if (datum instanceof osmEntity) {
-             // targeting an entity
-             var selectedIDs = context.selectedIDs();
-             context.selectedNoteID(null);
-             context.selectedErrorID(null);
+         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 (!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
+           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
+         //
 
-                 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));
-             }
-           }
+         function reset(resetIgnored) {
+           // cancel deferred work
+           _deferredRIC.forEach(window.cancelIdleCallback);
 
-           context.ui().closeEditMenu(); // always request to show the edit menu in case the mode needs it
+           _deferredRIC.clear();
 
-           if (showMenu) context.ui().showEditMenu(point, interactionType);
-           resetProperties();
-         }
+           _deferredST.forEach(window.clearTimeout);
 
-         function cancelLongPress() {
-           if (_longPressTimeout) window.clearTimeout(_longPressTimeout);
-           _longPressTimeout = null;
-         }
+           _deferredST.clear(); // empty queues and resolve any pending promise
 
-         function resetProperties() {
-           cancelLongPress();
-           _showMenu = false;
-           _lastInteractionType = null; // don't reset _lastMouseEvent since it might still be useful
-         }
 
-         function behavior(selection) {
-           resetProperties();
-           _lastMouseEvent = context.map().lastPointerEvent();
-           select(window).on('keydown.select', keydown).on('keyup.select', keyup).on(_pointerPrefix + 'move.select', pointermove, true).on(_pointerPrefix + 'up.select', pointerup, true).on('pointercancel.select', pointercancel, true).on('contextmenu.select-window', function (d3_event) {
-             // Edge and IE really like to show the contextmenu on the
-             // menubar when user presses a keyboard menu button
-             // even after we've already preventdefaulted the key event.
-             var e = d3_event;
+           _baseCache.queue = [];
+           _headCache.queue = [];
+           processQueue(_headCache);
+           processQueue(_baseCache); // clear caches
 
-             if (+e.clientX === 0 && +e.clientY === 0) {
-               d3_event.preventDefault();
-             }
-           });
-           selection.on(_pointerPrefix + 'down.select', pointerdown).on('contextmenu.select', contextmenu);
-           /*if (d3_event && d3_event.shiftKey) {
-               context.surface()
-                   .classed('behavior-multiselect', true);
-           }*/
-         }
+           if (resetIgnored) _ignoredIssueIDs.clear();
 
-         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);
-         };
+           _resolvedIssueIDs.clear();
 
-         return behavior;
-       }
+           _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)
+         //
 
-       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.
 
-         var _nodeIndex;
+         validator.reset = function () {
+           reset(true);
+         }; // `resetIgnoredIssues()`
+         // clears out the _ignoredIssueIDs Set
+         //
 
-         var _origWay;
 
-         var _wayGeometry;
+         validator.resetIgnoredIssues = function () {
+           _ignoredIssueIDs.clear();
 
-         var _headNodeID;
+           dispatch.call('validated'); // redraw UI
+         }; // `revalidateUnsquare()`
+         // Called whenever the user changes the unsquare threshold
+         // It reruns just the "unsquare_way" validation on all buildings.
+         //
 
-         var _annotation;
 
-         var _pointerHasMoved = false; // The osmNode to be placed.
-         // This is temporary and just follows the mouse cursor until an "add" event occurs.
+         validator.revalidateUnsquare = function () {
+           revalidateUnsquare(_headCache);
+           revalidateUnsquare(_baseCache);
+           dispatch.call('validated');
+         };
 
-         var _drawNode;
+         function revalidateUnsquare(cache) {
+           var checkUnsquareWay = _rules.unsquare_way;
+           if (!cache.graph || typeof checkUnsquareWay !== 'function') return; // uncache existing
 
-         var _didResolveTempEdit = false;
+           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
 
-         function createDrawNode(loc) {
-           // don't make the draw node until we actually need it
-           _drawNode = osmNode({
-             loc: loc
+           buildings.forEach(function (entity) {
+             var detected = checkUnsquareWay(entity, cache.graph);
+             if (!detected.length) return;
+             cache.cacheIssues(detected);
            });
-           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();
-         }
+         } // `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
+         //
 
-         function removeDrawNode() {
-           context.pauseChangeDispatch();
-           context.replace(function actionDeleteDrawNode(graph) {
-             var way = graph.entity(wayID);
-             return graph.replace(way.removeNode(_drawNode.id)).remove(_drawNode);
-           }, _annotation);
-           _drawNode = undefined;
-           context.resumeChangeDispatch();
-         }
 
-         function keydown(d3_event) {
-           if (d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
-             if (context.surface().classed('nope')) {
-               context.surface().classed('nope-suppressed', true);
-             }
+         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 - caused by user edits
 
-             context.surface().classed('nope', false).classed('nope-disabled', true);
+           if (_headCache.graph && _headCache.graph !== _baseCache.graph) {
+             Object.values(_headCache.issuesByIssueID).forEach(function (issue) {
+               if (!filter(issue)) return;
+               seen.add(issue.id);
+               results.push(issue);
+             });
+           } // collect base issues - not caused by user edits
+
+
+           if (opts.what === 'all') {
+             Object.values(_baseCache.issuesByIssueID).forEach(function (issue) {
+               if (!filter(issue)) return;
+               seen.add(issue.id);
+               results.push(issue);
+             });
            }
-         }
 
-         function keyup(d3_event) {
-           if (d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
-             if (context.surface().classed('nope-suppressed')) {
-               context.surface().classed('nope', true);
+           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 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 ((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;
              }
 
-             context.surface().classed('nope-suppressed', false).classed('nope-disabled', 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
+         //
 
-         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()`
 
+         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
+         //
 
-         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;
 
-           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);
+         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..
 
-             if (choice) {
-               loc = choice.loc;
-             }
-           }
+           var issueExtent = issue.extent(graph);
 
-           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 (issueExtent) {
+             focusCenter = issueExtent.center();
+           } // Try to select the first entity in the issue..
 
 
-         function checkGeometry(includeDrawNode) {
-           var nopeDisabled = context.surface().classed('nope-disabled');
-           var isInvalid = isInvalidGeometry(includeDrawNode);
+           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 (nopeDisabled) {
-             context.surface().classed('nope', false).classed('nope-suppressed', isInvalid);
-           } else {
-             context.surface().classed('nope', isInvalid).classed('nope-suppressed', false);
-           }
-         }
+             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);
+               });
 
-         function isInvalidGeometry(includeDrawNode) {
-           var testNode = _drawNode; // we only need to test the single way we're drawing
+               if (!nodeID) {
+                 // relation has no downloaded nodes to focus on
+                 var wayID = ids.find(function (id) {
+                   return id.charAt(0) === 'w' && graph.hasEntity(id);
+                 });
 
-           var parentWay = context.graph().entity(wayID);
-           var nodes = context.graph().childNodes(parentWay).slice(); // shallow copy
+                 if (wayID) {
+                   nodeID = graph.entity(wayID).first(); // focus on the first node of this way
+                 }
+               }
 
-           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 (nodeID) {
+                 focusCenter = graph.entity(nodeID).loc;
+               }
              }
            }
 
-           return testNode && geoHasSelfIntersections(nodes, testNode.id);
-         }
+           if (focusCenter) {
+             // Adjust the view
+             var setZoom = Math.max(context.map().zoom(), 19);
+             context.map().unobscuredCenterZoomEase(focusCenter, setZoom);
+           }
 
-         function undone() {
-           // undoing removed the temp edit
-           _didResolveTempEdit = true;
-           context.pauseChangeDispatch();
-           var nextMode;
+           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
+         //   }
+         //
 
-           if (context.graph() === startGraph) {
-             // We've undone back to the initial state before we started drawing.
-             // Just exit the draw mode without undoing whatever we did before
-             // we entered the draw mode.
-             nextMode = modeSelect(context, [wayID]);
-           } else {
-             // The `undo` only removed the temporary edit, so here we have to
-             // manually undo to actually remove the last node we added. We can't
-             // use the `undo` function since the initial "add" graph doesn't have
-             // an annotation and so cannot be undone to.
-             context.pop(1); // continue drawing
 
-             nextMode = mode;
-           } // clear the redo stack by adding and removing a blank edit
+         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
+         //
 
 
-           context.perform(actionNoop());
-           context.pop(1);
-           context.resumeChangeDispatch();
-           context.enter(nextMode);
-         }
+         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;
+             }
 
-         function setActiveElements() {
-           if (!_drawNode) return;
-           context.surface().selectAll('.' + _drawNode.id).classed('active', true);
-         }
+             var index1 = orderedIssueTypes.indexOf(issue1.type);
+             var index2 = orderedIssueTypes.indexOf(issue2.type);
 
-         function resetToStartGraph() {
-           while (context.graph() !== startGraph) {
-             context.pop();
-           }
-         }
+             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
+         //
 
-         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.
 
-           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);
-         };
+         validator.getEntityIssues = function (entityID, options) {
+           return validator.getSharedEntityIssues([entityID], options);
+         }; // `getRuleKeys()`
+         //
+         // Returns
+         //   An Array containing the rule keys
+         //
 
-         drawWay.off = function (surface) {
-           if (!_didResolveTempEdit) {
-             // Drawing was interrupted unexpectedly.
-             // This can happen if the user changes modes,
-             // clicks geolocate button, a hashchange event occurs, etc.
-             context.pauseChangeDispatch();
-             resetToStartGraph();
-             context.resumeChangeDispatch();
-           }
 
-           _drawNode = undefined;
-           _nodeIndex = undefined;
-           context.map().on('drawn.draw', null);
-           surface.call(behavior.off).selectAll('.active').classed('active', false);
-           surface.classed('nope', false).classed('nope-suppressed', false).classed('nope-disabled', false);
-           select(window).on('keydown.drawWay', null).on('keyup.drawWay', null);
-           context.history().on('undone.draw', null);
-         };
+         validator.getRuleKeys = function () {
+           return Object.keys(_rules);
+         }; // `isRuleEnabled()`
+         //
+         // Arguments
+         //   `key` - the rule to check (e.g. 'crossing_ways')
+         // Returns
+         //   `true`/`false`
+         //
 
-         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);
+
+         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 {
-             createDrawNode(loc);
+             _disabledRules[key] = true;
            }
 
-           checkGeometry(true
-           /* includeDrawNode */
-           );
+           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
+         //
 
-           if (d && d.properties && d.properties.nope || context.surface().classed('nope')) {
-             if (!_pointerHasMoved) {
-               // prevent the temporary draw node from appearing on touch devices
-               removeDrawNode();
-             }
 
-             dispatch$1.call('rejectedSelfIntersection', this);
-             return; // can't click here
-           }
+         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
+         //
 
-           context.pauseChangeDispatch();
-           doAdd(); // we just replaced the temporary edit with the real one
 
-           _didResolveTempEdit = true;
-           context.resumeChangeDispatch();
-           context.enter(mode);
-         } // Accept the current position of the drawing node
+         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.
+         //
 
 
-         drawWay.add = function (loc, d) {
-           attemptAdd(d, loc, function () {// don't need to do anything extra
-           });
-         }; // Connect the way to an existing way
+         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();
+           }
 
+           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
 
-         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
+             return _headPromise;
+           } // If we get here, its time to start validating stuff.
 
 
-         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;
+           _headCache.graph = currGraph; // take snapshot
+
+           _completeDiff = context.history().difference().complete();
+           var incrementalDiff = coreDifference(prevGraph, currGraph);
+           var entityIDs = Object.keys(incrementalDiff.complete()); // if (!entityIDs.size) {
+
+           if (!entityIDs.length) {
+             dispatch.call('validated');
+             return Promise.resolve();
            }
 
-           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);
+           _headPromise = validateEntitiesAsync(entityIDs, _headCache).then(function () {
+             return updateResolvedIssues(entityIDs);
+           }).then(function () {
+             return dispatch.call('validated');
+           })["catch"](function () {
+             /* ignore */
+           }).then(function () {
+             _headPromise = null;
+
+             if (!_headIsCurrent) {
+               validator.validate(); // run it again to catch up to current graph
+             }
            });
-         }; // Finish the draw operation, removing the temporary edit.
-         // If the way has enough nodes to be valid, it's selected.
-         // Otherwise, delete everything and return to browse mode.
+           return _headPromise;
+         }; // register event handlers:
+         // WHEN TO RUN VALIDATION:
+         // When history changes:
 
 
-         drawWay.finish = function () {
-           checkGeometry(false
-           /* includeDrawNode */
-           );
+         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
 
-           if (context.surface().classed('nope')) {
-             dispatch$1.call('rejectedSelfIntersection', this);
-             return; // can't click here
-           }
+           validator.validate();
+         }); // but not on 'change' (e.g. while drawing)
+         // When user changes editing modes (to catch recent changes e.g. drawing)
 
-           context.pauseChangeDispatch(); // remove the temporary edit
+         context.on('exit.validator', validator.validate); // When merging fetched data, validate base graph:
 
-           context.pop(1);
-           _didResolveTempEdit = true;
-           context.resumeChangeDispatch();
-           var way = context.hasEntity(wayID);
+         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)
 
-           if (!way || way.isDegenerate()) {
-             drawWay.cancel();
-             return;
-           }
+           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 = entityIDsToValidate(entityIDs, baseGraph);  // 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
+         //   }
+         //
 
-           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.
+         function validateEntity(entity, graph) {
+           var result = {
+             issues: [],
+             provisional: false
+           };
+           Object.keys(_rules).forEach(runValidation); // run all rules
 
+           return result; // runs validation and appends resulting issues
 
-         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));
-         };
+           function runValidation(key) {
+             var fn = _rules[key];
 
-         drawWay.nodeIndex = function (val) {
-           if (!arguments.length) return _nodeIndex;
-           _nodeIndex = val;
-           return drawWay;
-         };
+             if (typeof fn !== 'function') {
+               console.error('no such validation rule = ' + key); // eslint-disable-line no-console
 
-         drawWay.activeID = function () {
-           if (!arguments.length) return _drawNode && _drawNode.id; // no assign
+               return;
+             }
 
-           return drawWay;
-         };
+             var detected = fn(entity, graph);
 
-         return utilRebind(drawWay, dispatch$1, 'on');
-       }
+             if (detected.provisional) {
+               // this validation should be run again later
+               result.provisional = true;
+             }
 
-       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;
+             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.
 
-         mode.enter = function () {
-           behavior.nodeIndex(affix === 'prefix' ? 0 : undefined);
-           context.install(behavior);
-         };
+             function applySeverityOverrides(issue) {
+               var type = issue.type;
+               var subtype = issue.subtype || '';
+               var i;
 
-         mode.exit = function () {
-           context.uninstall(behavior);
-         };
+               for (i = 0; i < _errorOverrides.length; i++) {
+                 if (_errorOverrides[i].type.test(type) && _errorOverrides[i].subtype.test(subtype)) {
+                   issue.severity = 'error';
+                   return true;
+                 }
+               }
 
-         mode.selectedIDs = function () {
-           return [wayID];
-         };
+               for (i = 0; i < _warningOverrides.length; i++) {
+                 if (_warningOverrides[i].type.test(type) && _warningOverrides[i].subtype.test(subtype)) {
+                   issue.severity = 'warning';
+                   return true;
+                 }
+               }
 
-         mode.activeID = function () {
-           return behavior && behavior.activeID() || [];
-         };
+               for (i = 0; i < _disableOverrides.length; i++) {
+                 if (_disableOverrides[i].type.test(type) && _disableOverrides[i].subtype.test(subtype)) {
+                   return false;
+                 }
+               }
 
-         return mode;
-       }
+               return true;
+             }
+           }
+         } // `updateResolvedIssues()`   (private)
+         // Determine if any issues were resolved for the given entities.
+         // This is called by `validate()` after validation of the head graph
+         //
+         // Give the user credit for fixing an issue if:
+         // - the issue is in the base cache
+         // - the issue is not in the head cache
+         // - the user did something to one of the entities involved in the issue
+         //
+         // Arguments
+         //   `entityIDs` - Array containing entity IDs.
+         //
 
-       function operationContinue(context, selectedIDs) {
-         var _entities = selectedIDs.map(function (id) {
-           return context.graph().entity(id);
-         });
 
-         var _geometries = Object.assign({
-           line: [],
-           vertex: []
-         }, utilArrayGroupBy(_entities, function (entity) {
-           return entity.geometry(context.graph());
-         }));
+         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 _vertex = _geometries.vertex.length && _geometries.vertex[0];
+               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)
 
-         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);
-           }) : [];
-         }
+               }
+             });
+           });
+         } // `validateEntitiesAsync()`   (private)
+         // Schedule validation for many entities.
+         //
+         // Arguments
+         //   `entityIDs` - Array containing entity IDs.
+         //   `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 _candidates = candidateWays();
 
-         var operation = function operation() {
-           var candidate = _candidates[0];
-           context.enter(modeDrawLine(context, candidate.id, context.graph(), 'line', candidate.affix(_vertex.id), true));
-         };
+         function validateEntitiesAsync(entityIDs, cache) {
+           // Enqueue the work
+           var jobs = entityIDs.map(function (entityID) {
+             if (cache.queuedEntityIDs.has(entityID)) return null; // queued already
 
-         operation.relatedEntityIds = function () {
-           return _candidates.length ? [_candidates[0].id] : [];
-         };
+             cache.queuedEntityIDs.add(entityID);
+             return function () {
+               // Clear caches for existing issues related to this entity
+               cache.uncacheEntityID(entityID);
+               cache.queuedEntityIDs["delete"](entityID);
+               var graph = cache.graph;
+               if (!graph) return; // was reset?
 
-         operation.available = function () {
-           return _geometries.vertex.length === 1 && _geometries.line.length <= 1 && !context.features().hasHiddenConnections(_vertex, context.graph());
-         };
+               var entity = graph.hasEntity(entityID); // Sanity check: don't validate deleted entities
 
-         operation.disabled = function () {
-           if (_candidates.length === 0) {
-             return 'not_eligible';
-           } else if (_candidates.length > 1) {
-             return 'multiple';
-           }
+               if (!entity) return; // In the head cache, only validate 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.
 
-           return false;
-         };
+               if (cache.which === 'head' && !_completeDiff.hasOwnProperty(entityID)) return; // detect new issues and update caches
 
-         operation.tooltip = function () {
-           var disable = operation.disabled();
-           return disable ? _t('operations.continue.' + disable) : _t('operations.continue.description');
-         };
+               var result = validateEntity(entity, graph);
 
-         operation.annotation = function () {
-           return _t('operations.continue.annotation.line');
-         };
+               if (result.provisional) {
+                 // provisional result
+                 cache.provisionalEntityIDs.add(entityID); // we'll need to revalidate this entity again later
+               }
 
-         operation.id = 'continue';
-         operation.keys = [_t('operations.continue.key')];
-         operation.title = _t('operations.continue.title');
-         operation.behavior = behaviorOperation(context).which(operation);
-         return operation;
-       }
+               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.
 
-       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
+           cache.queue = cache.queue.concat(utilArrayChunk(jobs, 100)); // Perform the work
 
-             return entity.hasInterestingTags() || entity.geometry(context.graph()) !== 'vertex';
+           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)
+         //
 
-         var operation = function operation() {
-           var graph = context.graph();
-           var selected = groupEntities(getFilteredIdsToCopy(), graph);
-           var canCopy = [];
-           var skip = {};
-           var entity;
-           var i;
 
-           for (i = 0; i < selected.relation.length; i++) {
-             entity = selected.relation[i];
+         function revalidateProvisionalEntities(cache) {
+           if (!cache.provisionalEntityIDs.size) return; // nothing to do
 
-             if (!skip[entity.id] && entity.isComplete(graph)) {
-               canCopy.push(entity.id);
-               skip = getDescendants(entity.id, graph, skip);
-             }
-           }
+           var handle = window.setTimeout(function () {
+             _deferredST["delete"](handle);
 
-           for (i = 0; i < selected.way.length; i++) {
-             entity = selected.way[i];
+             if (!cache.provisionalEntityIDs.size) return; // nothing to do
 
-             if (!skip[entity.id]) {
-               canCopy.push(entity.id);
-               skip = getDescendants(entity.id, graph, skip);
-             }
-           }
+             validateEntitiesAsync(Array.from(cache.provisionalEntityIDs), cache);
+           }, RETRY);
 
-           for (i = 0; i < selected.node.length; i++) {
-             entity = selected.node[i];
+           _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.
+         //
 
-             if (!skip[entity.id]) {
-               canCopy.push(entity.id);
-             }
-           }
 
-           context.copyIDs(canCopy);
+         function processQueue(cache) {
+           // console.log(`${cache.which} queue length ${cache.queue.length}`);
+           if (!cache.queue.length) return Promise.resolve(); // we're done
 
-           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);
-           }
-         };
+           var chunk = cache.queue.pop();
+           return new Promise(function (resolvePromise) {
+             var handle = window.requestIdleCallback(function () {
+               _deferredRIC["delete"](handle); // const t0 = performance.now();
 
-         function groupEntities(ids, graph) {
-           var entities = ids.map(function (id) {
-             return graph.entity(id);
-           });
-           return Object.assign({
-             relation: [],
-             way: [],
-             node: []
-           }, utilArrayGroupBy(entities, 'type'));
-         }
 
-         function getDescendants(id, graph, descendants) {
-           var entity = graph.entity(id);
-           var children;
-           descendants = descendants || {};
+               chunk.forEach(function (job) {
+                 return job();
+               }); // const t1 = performance.now();
+               // console.log('chunk processed in ' + (t1 - t0) + ' ms');
 
-           if (entity.type === 'relation') {
-             children = entity.members.map(function (m) {
-               return m.id;
+               resolvePromise();
              });
-           } else if (entity.type === 'way') {
-             children = entity.nodes;
-           } else {
-             children = [];
-           }
-
-           for (var i = 0; i < children.length; i++) {
-             if (!descendants[children[i]]) {
-               descendants[children[i]] = true;
-               descendants = getDescendants(children[i], graph, descendants);
-             }
-           }
 
-           return descendants;
+             _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);
+           });
          }
 
-         operation.available = function () {
-           return getFilteredIdsToCopy().length > 0;
-         };
-
-         operation.disabled = function () {
-           var extent = utilTotalExtent(getFilteredIdsToCopy(), context.graph());
+         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
+       //
 
-           if (extent.percentContainedIn(context.map().extent()) < 0.8) {
-             return 'too_large';
-           }
+       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)
 
-           return false;
          };
 
-         operation.availableForKeypress = function () {
-           var selection = window.getSelection && window.getSelection(); // if the user has text selected then let them copy that, not the selected feature
-
-           return !selection || !selection.toString();
-         };
+         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();
+               }
 
-         operation.tooltip = function () {
-           var disable = operation.disabled();
-           return disable ? _t('operations.copy.' + disable, {
-             n: selectedIDs.length
-           }) : _t('operations.copy.description', {
-             n: selectedIDs.length
+               cache.issuesByEntityID[entityID].add(issue.id);
+             });
+             cache.issuesByIssueID[issue.id] = issue;
            });
          };
 
-         operation.annotation = function () {
-           return _t('operations.copy.annotation', {
-             n: selectedIDs.length
+         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];
          };
 
-         var _point;
-
-         operation.point = function (val) {
-           _point = val;
-           return operation;
+         cache.uncacheIssues = function (issues) {
+           issues.forEach(cache.uncacheIssue);
          };
 
-         operation.id = 'copy';
-         operation.keys = [uiCmd('⌘C')];
-         operation.title = _t('operations.copy.title');
-         operation.behavior = behaviorOperation(context).which(operation);
-         return operation;
-       }
-
-       function operationDisconnect(context, selectedIDs) {
-         var _vertexIDs = [];
-         var _wayIDs = [];
-         var _otherIDs = [];
-         var _actions = [];
-         selectedIDs.forEach(function (id) {
-           var entity = context.entity(id);
+         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
 
-           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';
+         cache.uncacheEntityID = function (entityID) {
+           var issueIDs = cache.issuesByEntityID[entityID];
 
-         var _disconnectingVertexIds = [];
-         var _disconnectingWayIds = [];
+           if (issueIDs) {
+             issueIDs.forEach(function (issueID) {
+               var issue = cache.issuesByIssueID[issueID];
 
-         if (_vertexIDs.length > 0) {
-           // At the selected vertices, disconnect the selected ways, if any, else
-           // disconnect all connected ways
-           _disconnectingVertexIds = _vertexIDs;
+               if (issue) {
+                 cache.uncacheIssue(issue);
+               } else {
+                 delete cache.issuesByIssueID[issueID];
+               }
+             });
+           }
 
-           _vertexIDs.forEach(function (vertexID) {
-             var action = actionDisconnect(vertexID);
+           delete cache.issuesByEntityID[entityID];
+           cache.provisionalEntityIDs["delete"](entityID);
+         };
 
-             if (_wayIDs.length > 0) {
-               var waysIDsForVertex = _wayIDs.filter(function (wayID) {
-                 var way = context.entity(wayID);
-                 return way.nodes.indexOf(vertexID) !== -1;
-               });
+         return cache;
+       }
 
-               action.limitWays(waysIDsForVertex);
-             }
+       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 = [];
 
-             _actions.push(action);
+         var _origChanges;
 
-             _disconnectingWayIds = _disconnectingWayIds.concat(context.graph().parentWays(context.graph().entity(vertexID)).map(function (d) {
-               return d.id;
-             }));
-           });
+         var _discardTags = {};
+         _mainFileFetcher.get('discarded').then(function (d) {
+           _discardTags = d;
+         })["catch"](function () {
+           /* ignore */
+         });
+         var uploader = utilRebind({}, dispatch, 'on');
 
-           _disconnectingWayIds = utilArrayUniq(_disconnectingWayIds).filter(function (id) {
-             return _wayIDs.indexOf(id) === -1;
-           });
-           _descriptionID += _actions.length === 1 ? 'single_point.' : 'multiple_points.';
+         uploader.isSaving = function () {
+           return _isSaving;
+         };
 
-           if (_wayIDs.length === 1) {
-             _descriptionID += 'single_way.' + context.graph().geometry(_wayIDs[0]);
-           } else {
-             _descriptionID += _wayIDs.length === 0 ? 'no_ways' : 'multiple_ways';
+         uploader.save = function (changeset, tryAgain, checkConflicts) {
+           // Guard against accidentally entering save code twice - #4641
+           if (_isSaving && !tryAgain) {
+             return;
            }
-         } 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);
-           });
-
-           var nodes = utilGetAllNodes(_wayIDs, context.graph());
-           _coords = nodes.map(function (n) {
-             return n.loc;
-           }); // actions for connected nodes shared by at least two selected ways
 
-           var sharedActions = [];
-           var sharedNodes = []; // actions for connected nodes
+           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.
 
-           var unsharedActions = [];
-           var unsharedNodes = [];
-           nodes.forEach(function (node) {
-             var action = actionDisconnect(node.id).limitWays(_wayIDs);
+           if (!osm.authenticated()) {
+             osm.authenticate(function (err) {
+               if (!err) {
+                 uploader.save(changeset, tryAgain, checkConflicts); // continue where we left off..
+               }
+             });
+             return;
+           }
 
-             if (action.disabled(context.graph()) !== 'not_connected') {
-               var count = 0;
+           if (!_isSaving) {
+             _isSaving = true;
+             dispatch.call('saveStarted', this);
+           }
 
-               for (var i in ways) {
-                 var way = ways[i];
+           var history = context.history();
+           _conflicts = [];
+           _errors = []; // Store original changes, in case user wants to download them as an .osc file
 
-                 if (way.nodes.indexOf(node.id) !== -1) {
-                   count += 1;
-                 }
+           _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 (count > 1) break;
-               }
+           if (!tryAgain) {
+             history.perform(actionNoop());
+           } // Attempt a fast upload.. If there are conflicts, re-enter with `checkConflicts = true`
 
-               if (count > 1) {
-                 sharedActions.push(action);
-                 sharedNodes.push(node);
-               } else {
-                 unsharedActions.push(action);
-                 unsharedNodes.push(node);
-               }
-             }
-           });
-           _descriptionID += 'no_points.';
-           _descriptionID += _wayIDs.length === 1 ? 'single_way.' : 'multiple_ways.';
 
-           if (sharedActions.length) {
-             // if any nodes are shared, only disconnect the selected ways from each other
-             _actions = sharedActions;
-             _disconnectingVertexIds = sharedNodes.map(function (node) {
-               return node.id;
-             });
-             _descriptionID += 'conjoined';
-             _annotationID = 'from_each_other';
+           if (!checkConflicts) {
+             upload(changeset); // Do the full (slow) conflict check..
            } else {
-             // if no nodes are shared, disconnect the selected ways from all connected ways
-             _actions = unsharedActions;
-             _disconnectingVertexIds = unsharedNodes.map(function (node) {
-               return node.id;
-             });
+             performFullConflictCheck(changeset);
+           }
+         };
 
-             if (_wayIDs.length === 1) {
-               _descriptionID += context.graph().geometry(_wayIDs[0]);
-             } else {
-               _descriptionID += 'separate';
+         function performFullConflictCheck(changeset) {
+           var osm = context.connection();
+           if (!osm) return;
+           var history = context.history();
+           var localGraph = context.graph();
+           var remoteGraph = coreGraph(history.base(), true);
+           var summary = history.difference().summary();
+           var _toCheck = [];
+
+           for (var i = 0; i < summary.length; i++) {
+             var item = summary[i];
+
+             if (item.changeType === 'modified') {
+               _toCheck.push(item.entity.id);
              }
            }
-         }
 
-         var _extent = utilTotalExtent(_disconnectingVertexIds, context.graph());
-
-         var operation = function operation() {
-           context.perform(function (graph) {
-             return _actions.reduce(function (graph, action) {
-               return action(graph);
-             }, graph);
-           }, operation.annotation());
-           context.validator().validate();
-         };
+           var _toLoad = withChildNodes(_toCheck, localGraph);
 
-         operation.relatedEntityIds = function () {
-           if (_vertexIDs.length) {
-             return _disconnectingWayIds;
-           }
+           var _loaded = {};
+           var _toLoadCount = 0;
+           var _toLoadTotal = _toLoad.length;
 
-           return _disconnectingVertexIds;
-         };
+           if (_toCheck.length) {
+             dispatch.call('progressChanged', this, _toLoadCount, _toLoadTotal);
 
-         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;
+             _toLoad.forEach(function (id) {
+               _loaded[id] = false;
              });
-           })) return false;
-           return true;
-         };
-
-         operation.disabled = function () {
-           var reason;
 
-           for (var actionIndex in _actions) {
-             reason = _actions[actionIndex].disabled(context.graph());
-             if (reason) return reason;
+             osm.loadMultiple(_toLoad, loaded);
+           } else {
+             upload(changeset);
            }
 
-           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';
-           }
+           return;
 
-           return false;
+           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..
 
-           function someMissing() {
-             if (context.inIntro()) return false;
-             var osm = context.connection();
 
-             if (osm) {
-               var missing = _coords.filter(function (loc) {
-                 return !osm.isDataLoaded(loc);
+           function loaded(err, result) {
+             if (_errors.length) return;
+
+             if (err) {
+               _errors.push({
+                 msg: err.message || err.responseText,
+                 details: [_t('save.status_code', {
+                   code: err.status
+                 })]
                });
 
-               if (missing.length) {
-                 missing.forEach(function (loc) {
-                   context.loadTileAtLoc(loc);
+               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;
                  });
-                 return true;
-               }
-             }
+                 if (!entity.visible) return; // Because loadMultiple doesn't download /full like loadEntity,
+                 // need to also load children that aren't already being checked..
 
-             return false;
-           }
-         };
+                 var i, id;
 
-         operation.tooltip = function () {
-           var disable = operation.disabled();
+                 if (entity.type === 'way') {
+                   for (i = 0; i < entity.nodes.length; i++) {
+                     id = entity.nodes[i];
 
-           if (disable) {
-             return _t('operations.disconnect.' + disable);
-           }
+                     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;
 
-           return _t('operations.disconnect.description.' + _descriptionID);
-         };
+                     if (_loaded[id] === undefined) {
+                       _loaded[id] = false;
+                       loadMore.push(id);
+                     }
+                   }
+                 }
+               });
+               _toLoadCount += result.data.length;
+               _toLoadTotal += loadMore.length;
+               dispatch.call('progressChanged', this, _toLoadCount, _toLoadTotal);
 
-         operation.annotation = function () {
-           return _t('operations.disconnect.annotation.' + _annotationID);
-         };
+               if (loadMore.length) {
+                 _toLoad.push.apply(_toLoad, loadMore);
 
-         operation.id = 'disconnect';
-         operation.keys = [_t('operations.disconnect.key')];
-         operation.title = _t('operations.disconnect.title');
-         operation.behavior = behaviorOperation(context).which(operation);
-         return operation;
-       }
+                 osm.loadMultiple(loadMore, loaded);
+               }
 
-       function operationDowngrade(context, selectedIDs) {
-         var _affectedFeatureCount = 0;
+               if (!_toLoad.length) {
+                 detectConflicts();
+                 upload(changeset);
+               }
+             }
+           }
 
-         var _downgradeType = downgradeTypeForEntityIDs(selectedIDs);
+           function detectConflicts() {
+             function choice(id, text, _action) {
+               return {
+                 id: id,
+                 text: text,
+                 action: function action() {
+                   history.replace(_action);
+                 }
+               };
+             }
 
-         var _multi = _affectedFeatureCount === 1 ? 'single' : 'multiple';
+             function formatUser(d) {
+               return '<a href="' + osm.userURL(d) + '" target="_blank">' + d + '</a>';
+             }
 
-         function downgradeTypeForEntityIDs(entityIds) {
-           var downgradeType;
-           _affectedFeatureCount = 0;
+             function entityName(entity) {
+               return utilDisplayName(entity) || utilDisplayType(entity.id) + ' ' + entity.id;
+             }
 
-           for (var i in entityIds) {
-             var entityID = entityIds[i];
-             var type = downgradeTypeForEntityID(entityID);
+             function sameVersions(local, remote) {
+               if (local.version !== remote.version) return false;
 
-             if (type) {
-               _affectedFeatureCount += 1;
+               if (local.type === 'way') {
+                 var children = utilArrayUnion(local.nodes, remote.nodes);
 
-               if (downgradeType && type !== downgradeType) {
-                 if (downgradeType !== 'generic' && type !== 'generic') {
-                   downgradeType = 'building_address';
-                 } else {
-                   downgradeType = 'generic';
+                 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;
                  }
-               } else {
-                 downgradeType = type;
                }
+
+               return true;
              }
-           }
 
-           return downgradeType;
-         }
+             _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
 
-         function downgradeTypeForEntityID(entityID) {
-           var graph = context.graph();
-           var entity = graph.entity(entityID);
-           var preset = _mainPresetIndex.match(entity, graph);
-           if (!preset || preset.isFallback()) return null;
+               var 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'));
 
-           if (entity.type === 'node' && preset.id !== 'address' && Object.keys(entity.tags).some(function (key) {
-             return key.match(/^addr:.{1,}/);
-           })) {
-             return 'address';
+               _conflicts.push({
+                 id: id,
+                 name: entityName(local),
+                 details: mergeConflicts,
+                 chosen: 1,
+                 choices: [choice(id, keepMine, forceLocal), choice(id, keepTheirs, forceRemote)]
+               });
+             });
            }
+         }
 
-           var geometry = entity.geometry(graph);
+         function upload(changeset) {
+           var osm = context.connection();
 
-           if (geometry === 'area' && entity.tags.building && !preset.tags.building) {
-             return 'building';
+           if (!osm) {
+             _errors.push({
+               msg: 'No OSM Service'
+             });
            }
 
-           if (geometry === 'vertex' && Object.keys(entity.tags).length) {
-             return 'generic';
-           }
+           if (_conflicts.length) {
+             didResultInConflicts(changeset);
+           } else if (_errors.length) {
+             didResultInErrors();
+           } else {
+             var history = context.history();
+             var changes = history.changes(actionDiscardTags(history.difference(), _discardTags));
 
-           return null;
+             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();
+             }
+           }
          }
 
-         var buildingKeysToKeep = ['architect', 'building', 'height', 'layer', 'source', 'type', 'wheelchair'];
-         var addressKeysToKeep = ['source'];
+         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 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
+               didResultInErrors();
+             }
+           } else {
+             didResultInSuccess(changeset);
+           }
+         }
 
-               for (var key in tags) {
-                 if (type === 'address' && addressKeysToKeep.indexOf(key) !== -1) continue;
+         function didResultInNoChanges() {
+           dispatch.call('resultNoChanges', this);
+           endSave();
+           context.flush(); // reset iD
+         }
 
-                 if (type === 'building') {
-                   if (buildingKeysToKeep.indexOf(key) !== -1 || key.match(/^building:.{1,}/) || key.match(/^roof:.{1,}/)) continue;
-                 }
+         function didResultInErrors() {
+           context.history().pop();
+           dispatch.call('resultErrors', this, _errors);
+           endSave();
+         }
 
-                 if (type !== 'generic') {
-                   if (key.match(/^addr:.{1,}/) || key.match(/^source:.{1,}/)) continue;
-                 }
+         function didResultInConflicts(changeset) {
+           _conflicts.sort(function (a, b) {
+             return b.id.localeCompare(a.id);
+           });
 
-                 delete tags[key];
-               }
+           dispatch.call('resultConflicts', this, changeset, _conflicts, _origChanges);
+           endSave();
+         }
 
-               graph = actionChangeTags(entityID, tags)(graph);
-             }
+         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
 
-             return graph;
-           }, operation.annotation());
-           context.validator().validate(); // refresh the select mode to enable the delete operation
+           window.setTimeout(function () {
+             endSave();
+             context.flush(); // reset iD
+           }, 2500);
+         }
 
-           context.enter(modeSelect(context, selectedIDs));
-         };
+         function endSave() {
+           _isSaving = false;
+           dispatch.call('saveEnded', this);
+         }
 
-         operation.available = function () {
-           return _downgradeType;
+         uploader.cancelConflictResolution = function () {
+           context.history().pop();
          };
 
-         operation.disabled = function () {
-           if (selectedIDs.some(hasWikidataTag)) {
-             return 'has_wikidata_tag';
-           }
-
-           return false;
+         uploader.processResolvedConflicts = function (changeset) {
+           var history = context.history();
 
-           function hasWikidataTag(id) {
-             var entity = context.entity(id);
-             return entity.tags.wikidata && entity.tags.wikidata.trim().length > 0;
-           }
-         };
+           for (var i = 0; i < _conflicts.length; i++) {
+             if (_conflicts[i].chosen === 1) {
+               // user chose "use theirs"
+               var entity = context.hasEntity(_conflicts[i].id);
 
-         operation.tooltip = function () {
-           var disable = operation.disabled();
-           return disable ? _t('operations.downgrade.' + disable + '.' + _multi) : _t('operations.downgrade.description.' + _downgradeType);
-         };
+               if (entity && entity.type === 'way') {
+                 var children = utilArrayUniq(entity.nodes);
 
-         operation.annotation = function () {
-           var suffix;
+                 for (var j = 0; j < children.length; j++) {
+                   history.replace(actionRevert(children[j]));
+                 }
+               }
 
-           if (_downgradeType === 'building_address') {
-             suffix = 'generic';
-           } else {
-             suffix = _downgradeType;
+               history.replace(actionRevert(_conflicts[i].id));
+             }
            }
 
-           return _t('operations.downgrade.annotation.' + suffix, {
-             n: _affectedFeatureCount
-           });
+           uploader.save(changeset, true, false); // tryAgain = true, checkConflicts = false
          };
 
-         operation.id = 'downgrade';
-         operation.keys = [uiCmd('⌫')];
-         operation.title = _t('operations.downgrade.title');
-         operation.behavior = behaviorOperation(context).which(operation);
-         return operation;
+         uploader.reset = function () {};
+
+         return uploader;
        }
 
-       function operationExtract(context, selectedIDs) {
-         var _amount = selectedIDs.length === 1 ? 'single' : 'multiple';
+       var abs = Math.abs;
+       var exp = Math.exp;
+       var E = Math.E;
 
-         var _geometries = utilArrayUniq(selectedIDs.map(function (entityID) {
-           return context.graph().hasEntity(entityID) && context.graph().geometry(entityID);
-         }).filter(Boolean));
+       var FORCED = fails(function () {
+         // eslint-disable-next-line es/no-math-sinh -- required for testing
+         return Math.sinh(-2e-17) != -2e-17;
+       });
 
-         var _geometryID = _geometries.length === 1 ? _geometries[0] : 'feature';
+       // `Math.sinh` method
+       // https://tc39.es/ecma262/#sec-math.sinh
+       // V8 near Chromium 38 has a problem with very small numbers
+       _export({ target: 'Math', stat: true, forced: FORCED }, {
+         sinh: function sinh(x) {
+           return abs(x = +x) < 1 ? (mathExpm1(x) - mathExpm1(-x)) / 2 : (exp(x - 1) - exp(-x - 1)) * (E / 2);
+         }
+       });
 
-         var _extent;
+       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
 
-         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;
+       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 (entity.type !== 'node') {
-             var preset = _mainPresetIndex.match(entity, graph); // only allow extraction from ways/relations if the preset supports points
+       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 (preset.geometry.indexOf('point') === -1) return null;
-           }
+       function vintageRange(vintage) {
+         var s;
 
-           _extent = _extent ? _extent.extend(entity.extent(graph)) : entity.extent(graph);
-           return actionExtract(entityID);
-         }).filter(Boolean);
+         if (vintage.start || vintage.end) {
+           s = vintage.start || '?';
 
-         var operation = function operation() {
-           var combinedAction = function combinedAction(graph) {
-             _actions.forEach(function (action) {
-               graph = action(graph);
-             });
+           if (vintage.start !== vintage.end) {
+             s += ' - ' + (vintage.end || '?');
+           }
+         }
 
-             return graph;
-           };
+         return s;
+       }
 
-           context.perform(combinedAction, operation.annotation()); // do the extract
+       function rendererBackgroundSource(data) {
+         var source = Object.assign({}, data); // shallow copy
 
-           var extractedNodeIDs = _actions.map(function (action) {
-             return action.getExtractedNodeID();
-           });
+         var _offset = [0, 0];
+         var _name = source.name;
+         var _description = source.description;
 
-           context.enter(modeSelect(context, extractedNodeIDs));
-         };
+         var _best = !!source.best;
 
-         operation.available = function () {
-           return _actions.length && selectedIDs.length === _actions.length;
-         };
+         var _template = source.encrypted ? utilAesDecrypt(source.template) : source.template;
 
-         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';
-           }
+         source.tileSize = data.tileSize || 256;
+         source.zoomExtent = data.zoomExtent || [0, 22];
+         source.overzoom = data.overzoom !== false;
 
-           return false;
+         source.offset = function (val) {
+           if (!arguments.length) return _offset;
+           _offset = val;
+           return source;
          };
 
-         operation.tooltip = function () {
-           var disableReason = operation.disabled();
-
-           if (disableReason) {
-             return _t('operations.extract.' + disableReason + '.' + _amount);
-           } else {
-             return _t('operations.extract.description.' + _geometryID + '.' + _amount);
-           }
+         source.nudge = function (val, zoomlevel) {
+           _offset[0] += val[0] / Math.pow(2, zoomlevel);
+           _offset[1] += val[1] / Math.pow(2, zoomlevel);
+           return source;
          };
 
-         operation.annotation = function () {
-           return _t('operations.extract.annotation', {
-             n: selectedIDs.length
+         source.name = function () {
+           var id_safe = source.id.replace(/\./g, '<TX_DOT>');
+           return _t('imagery.' + id_safe + '.name', {
+             "default": _name
            });
          };
 
-         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;
-         }
-
-         var operation = function operation() {
-           if (operation.disabled()) return;
-           context.perform(_action, operation.annotation());
-           context.validator().validate();
-           var resultIDs = selectedIDs.filter(context.hasEntity);
+         source.label = function () {
+           var id_safe = source.id.replace(/\./g, '<TX_DOT>');
+           return _t.html('imagery.' + id_safe + '.name', {
+             "default": _name
+           });
+         };
 
-           if (resultIDs.length > 1) {
-             var interestingIDs = resultIDs.filter(function (id) {
-               return context.entity(id).hasInterestingTags();
-             });
-             if (interestingIDs.length) resultIDs = interestingIDs;
-           }
+         source.description = function () {
+           var id_safe = source.id.replace(/\./g, '<TX_DOT>');
+           return _t.html('imagery.' + id_safe + '.description', {
+             "default": _description
+           });
+         };
 
-           context.enter(modeSelect(context, resultIDs));
+         source.best = function () {
+           return _best;
          };
 
-         operation.available = function () {
-           return selectedIDs.length >= 2;
+         source.area = function () {
+           if (!data.polygon) return Number.MAX_VALUE; // worldwide
+
+           var area = d3_geoArea({
+             type: 'MultiPolygon',
+             coordinates: [data.polygon]
+           });
+           return isNaN(area) ? 0 : area;
          };
 
-         operation.disabled = function () {
-           var actionDisabled = _action.disabled(context.graph());
+         source.imageryUsed = function () {
+           return _name || source.id;
+         };
 
-           if (actionDisabled) return actionDisabled;
-           var osm = context.connection();
+         source.template = function (val) {
+           if (!arguments.length) return _template;
 
-           if (osm && _action.resultingWayNodesLength && _action.resultingWayNodesLength(context.graph()) > osm.maxWayNodes()) {
-             return 'too_many_vertices';
+           if (source.id === 'custom' || source.id === 'Bing') {
+             _template = val;
            }
 
-           return false;
+           return source;
          };
 
-         operation.tooltip = function () {
-           var disabled = operation.disabled();
+         source.url = function (coord) {
+           var result = _template;
+           if (result === '') return result; // source 'none'
+           // Guess a type based on the tokens present in the template
+           // (This is for 'custom' source, where we don't know)
 
-           if (disabled) {
-             if (disabled === 'restriction') {
-               return _t('operations.merge.restriction', {
-                 relation: _mainPresetIndex.item('type/restriction').name()
-               });
+           if (!source.type) {
+             if (/SERVICE=WMS|\{(proj|wkid|bbox)\}/.test(_template)) {
+               source.type = 'wms';
+               source.projection = 'EPSG:3857'; // guess
+             } else if (/\{(x|y)\}/.test(_template)) {
+               source.type = 'tms';
+             } else if (/\{u\}/.test(_template)) {
+               source.type = 'bing';
              }
-
-             return _t('operations.merge.' + disabled);
            }
 
-           return _t('operations.merge.description');
-         };
+           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.merge.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)));
 
-         operation.id = 'merge';
-         operation.keys = [_t('operations.merge.key')];
-         operation.title = _t('operations.merge.title');
-         operation.behavior = behaviorOperation(context).which(operation);
-         return operation;
-       }
+               switch (source.projection) {
+                 case 'EPSG:4326':
+                   return {
+                     x: lon * 180 / Math.PI,
+                     y: lat * 180 / Math.PI
+                   };
 
-       function operationPaste(context) {
-         var _pastePoint;
+                 default:
+                   // EPSG:3857 and synonyms
+                   var mercCoords = mercatorRaw(lon, lat);
+                   return {
+                     x: 20037508.34 / Math.PI * mercCoords[0],
+                     y: 20037508.34 / Math.PI * mercCoords[1]
+                   };
+               }
+             };
 
-         var 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);
-           });
+             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;
 
-           for (var id in copies) {
-             var oldEntity = oldGraph.entity(id);
-             var newEntity = copies[id];
+                 case 'proj':
+                   return projection;
 
-             extent._extend(oldEntity.extent(oldGraph)); // Exclude child nodes from newIDs if their parent way was also copied.
+                 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 parents = context.graph().parentWays(newEntity);
-             var parentCopied = parents.some(function (parent) {
-               return originals.has(parent.id);
-             });
+                 case 'w':
+                   return minXmaxY.x;
 
-             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
+                 case 's':
+                   return maxXminY.y;
 
+                 case 'n':
+                   return maxXminY.x;
 
-           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
+                 case 'e':
+                   return minXmaxY.y;
 
-           context.replace(actionMove(newIDs, delta, projection), operation.annotation());
-           context.enter(modeSelect(context, newIDs));
-         };
+                 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 = '';
 
-         operation.point = function (val) {
-           _pastePoint = val;
-           return operation;
-         };
+               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();
+               }
 
-         operation.available = function () {
-           return context.mode().id === 'browse';
+               return u;
+             });
+           } // these apply to any type..
+
+
+           result = result.replace(/\{switch:([^}]+)\}/, function (s, r) {
+             var subdomains = r.split(',');
+             return subdomains[(coord[0] + coord[1]) % subdomains.length];
+           });
+           return result;
          };
 
-         operation.disabled = function () {
-           return !context.copyIDs().length;
+         source.validZoom = function (z) {
+           return source.zoomExtent[0] <= z && (source.overzoom || source.zoomExtent[1] > z);
          };
 
-         operation.tooltip = function () {
-           var oldGraph = context.copyGraph();
-           var ids = context.copyIDs();
+         source.isLocatorOverlay = function () {
+           return source.id === 'mapbox_locator_overlay';
+         };
+         /* hides a source from the list, but leaves it available for use */
 
-           if (!ids.length) {
-             return _t('operations.paste.nothing_copied');
-           }
 
-           return _t('operations.paste.description', {
-             feature: utilDisplayLabel(oldGraph.entity(ids[0]), oldGraph),
-             n: ids.length
-           });
+         source.isHidden = function () {
+           return source.id === 'DigitalGlobe-Premium-vintage' || source.id === 'DigitalGlobe-Standard-vintage';
          };
 
-         operation.annotation = function () {
-           var ids = context.copyIDs();
-           return _t('operations.paste.annotation', {
-             n: ids.length
-           });
+         source.copyrightNotices = function () {};
+
+         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);
          };
 
-         operation.id = 'paste';
-         operation.keys = [uiCmd('⌘V')];
-         operation.title = _t('operations.paste.title');
-         return operation;
+         return source;
        }
 
-       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();
-         };
+       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
 
-         function actions(situation) {
-           return selectedIDs.map(function (entityID) {
-             var entity = context.hasEntity(entityID);
-             if (!entity) return null;
+         var key = 'Ak5oTE46TUbjRp08OFVcGpkARErDobfpuyNKa-W2mQ8wbt1K1KL8p1bIRwWwcF-Q'; // iD
 
-             if (situation === 'toolbar') {
-               if (entity.type === 'way' && !entity.isOneWay() && !entity.isSided()) return null;
-             }
+         /*
+         missing tile image strictness param (n=)
+         •   n=f -> (Fail) returns a 404
+         •   n=z -> (Empty) returns a 200 with 0 bytes (no content)
+         •   n=t -> (Transparent) returns a 200 with a transparent (png) tile
+         */
 
-             var 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 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
 
-         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 template = imageryResource.imageUrl; //https://ecn.{subdomain}.tiles.virtualearth.net/tiles/a{quadkey}.jpeg?g=10339
 
-         operation.available = function (situation) {
-           return actions(situation).length > 0;
-         };
+           var subDomains = imageryResource.imageUrlSubdomains; //["t0, t1, t2, t3"]
 
-         operation.disabled = function () {
-           return false;
-         };
+           var subDomainNumbers = subDomains.map(function (subDomain) {
+             return subDomain.substring(1);
+           }).join(',');
+           template = template.replace('{subdomain}', "t{switch:".concat(subDomainNumbers, "}")).replace('{quadkey}', '{u}');
 
-         operation.tooltip = function () {
-           return _t('operations.reverse.description.' + reverseTypeID());
+           if (!new URLSearchParams(template).has(strictParam)) {
+             template += "&".concat(strictParam, "=z");
+           }
+
+           bing.template(template);
+           providers = imageryResource.imageryProviders.map(function (provider) {
+             return {
+               attribution: provider.attribution,
+               areas: provider.coverageAreas.map(function (area) {
+                 return {
+                   zoom: [area.zoomMin, area.zoomMax],
+                   extent: geoExtent([area.bbox[1], area.bbox[0]], [area.bbox[3], area.bbox[2]])
+                 };
+               })
+             };
+           });
+           dispatch.call('change');
+         })["catch"](function () {
+           /* ignore */
+         });
+
+         bing.copyrightNotices = function (zoom, extent) {
+           zoom = Math.min(zoom, 21);
+           return providers.filter(function (provider) {
+             return provider.areas.some(function (area) {
+               return extent.intersects(area.extent) && area.zoom[0] <= zoom && area.zoom[1] >= zoom;
+             });
+           }).map(function (provider) {
+             return provider.attribution;
+           }).join(', ');
          };
 
-         operation.annotation = function () {
-           var acts = actions();
-           return _t('operations.reverse.annotation.' + reverseTypeID(), {
-             n: acts.length
+         bing.getMetadata = function (center, tileCoord, callback) {
+           var tileID = tileCoord.slice(0, 3).join('/');
+           var zoom = Math.min(tileCoord[2], 21);
+           var centerPoint = center[1] + ',' + center[0]; // lat,lng
+
+           var url = 'https://dev.virtualearth.net/REST/v1/Imagery/Metadata/Aerial/' + centerPoint + '?zl=' + zoom + '&key=' + key;
+           if (inflight[tileID]) return;
+
+           if (!cache[tileID]) {
+             cache[tileID] = {};
+           }
+
+           if (cache[tileID] && cache[tileID].metadata) {
+             return callback(null, cache[tileID].metadata);
+           }
+
+           inflight[tileID] = true;
+           d3_json(url).then(function (result) {
+             delete inflight[tileID];
+
+             if (!result) {
+               throw new Error('Unknown Error');
+             }
+
+             var vintage = {
+               start: localeDateString(result.resourceSets[0].resources[0].vintageStart),
+               end: localeDateString(result.resourceSets[0].resources[0].vintageEnd)
+             };
+             vintage.range = vintageRange(vintage);
+             var metadata = {
+               vintage: vintage
+             };
+             cache[tileID].metadata = metadata;
+             if (callback) callback(null, metadata);
+           })["catch"](function (err) {
+             delete inflight[tileID];
+             if (callback) callback(err.message);
            });
          };
 
-         operation.id = 'reverse';
-         operation.keys = [_t('operations.reverse.key')];
-         operation.title = _t('operations.reverse.title');
-         operation.behavior = behaviorOperation(context).which(operation);
-         return operation;
-       }
+         bing.terms_url = 'https://blog.openstreetmap.org/2010/11/30/microsoft-imagery-details';
+         return bing;
+       };
 
-       function operationSplit(context, selectedIDs) {
-         var _vertexIds = selectedIDs.filter(function (id) {
-           return context.graph().geometry(id) === 'vertex';
-         });
+       rendererBackgroundSource.Esri = function (data) {
+         // in addition to using the tilemap at zoom level 20, overzoom real tiles - #4327 (deprecated technique, but it works)
+         if (data.template.match(/blankTile/) === null) {
+           data.template = data.template + '?blankTile=false';
+         }
 
-         var _selectedWayIds = selectedIDs.filter(function (id) {
-           var entity = context.graph().hasEntity(id);
-           return entity && entity.type === 'way';
-         });
+         var esri = rendererBackgroundSource(data);
+         var cache = {};
+         var inflight = {};
 
-         var _isAvailable = _vertexIds.length > 0 && _vertexIds.length + _selectedWayIds.length === selectedIDs.length;
+         var _prevCenter; // use a tilemap service to set maximum zoom for esri tiles dynamically
+         // https://developers.arcgis.com/documentation/tiled-elevation-service/
 
-         var _action = actionSplit(_vertexIds);
 
-         var _ways = [];
-         var _geometry = 'feature';
-         var _waysAmount = 'single';
+         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 _nodesAmount = _vertexIds.length === 1 ? 'single' : 'multiple';
+           var z = 20; // first generate a random url using the template
 
-         if (_isAvailable) {
-           if (_selectedWayIds.length) _action.limitWays(_selectedWayIds);
-           _ways = _action.ways(context.graph());
-           var geometries = {};
+           var dummyUrl = esri.url([1, 2, 3]); // calculate url z/y/x from the lat/long of the center of the map
 
-           _ways.forEach(function (way) {
-             geometries[way.geometry(context.graph())] = true;
-           });
+           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
 
-           if (Object.keys(geometries).length === 1) {
-             _geometry = Object.keys(geometries)[0];
-           }
+           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
 
-           _waysAmount = _ways.length === 1 ? 'single' : 'multiple';
-         }
+           d3_json(tilemapUrl).then(function (tilemap) {
+             if (!tilemap) {
+               throw new Error('Unknown Error');
+             }
 
-         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
+             var hasTiles = true;
 
-           var idsToSelect = _vertexIds.concat(difference.extantIDs().filter(function (id) {
-             // filter out relations that may have had member additions
-             return context.entity(id).type === 'way';
-           }));
+             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
 
-           context.enter(modeSelect(context, idsToSelect));
-         };
 
-         operation.relatedEntityIds = function () {
-           return _selectedWayIds.length ? [] : _ways.map(function (way) {
-             return way.id;
+             esri.zoomExtent[1] = hasTiles ? 22 : 19;
+           })["catch"](function () {
+             /* ignore */
            });
          };
 
-         operation.available = function () {
-           return _isAvailable;
-         };
+         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)
 
-         operation.disabled = function () {
-           var reason = _action.disabled(context.graph());
+           var unknown = _t('info_panels.background.unknown');
+           var metadataLayer;
+           var vintage = {};
+           var metadata = {};
+           if (inflight[tileID]) return;
 
-           if (reason) {
-             return reason;
-           } else if (selectedIDs.some(context.hasHiddenConnections)) {
-             return 'connected_to_hidden';
-           }
+           switch (true) {
+             case zoom >= 20 && esri.id === 'EsriWorldImageryClarity':
+               metadataLayer = 4;
+               break;
 
-           return false;
-         };
+             case zoom >= 19:
+               metadataLayer = 3;
+               break;
 
-         operation.tooltip = function () {
-           var disable = operation.disabled();
-           if (disable) return _t('operations.split.' + disable);
-           return _t('operations.split.description.' + _geometry + '.' + _waysAmount + '.' + _nodesAmount + '_node');
-         };
+             case zoom >= 17:
+               metadataLayer = 2;
+               break;
 
-         operation.annotation = function () {
-           return _t('operations.split.annotation.' + _geometry, {
-             n: _ways.length
-           });
-         };
+             case zoom >= 13:
+               metadataLayer = 0;
+               break;
 
-         operation.id = 'split';
-         operation.keys = [_t('operations.split.key')];
-         operation.title = _t('operations.split.title');
-         operation.behavior = behaviorOperation(context).which(operation);
-         return operation;
-       }
+             default:
+               metadataLayer = 99;
+           }
 
-       function operationStraighten(context, selectedIDs) {
-         var _wayIDs = selectedIDs.filter(function (id) {
-           return id.charAt(0) === 'w';
-         });
+           var url; // build up query using the layer appropriate to the current zoom
 
-         var _nodeIDs = selectedIDs.filter(function (id) {
-           return id.charAt(0) === 'n';
-         });
+           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/';
+           }
 
-         var _amount = (_wayIDs.length ? _wayIDs : _nodeIDs).length === 1 ? 'single' : 'multiple';
+           url += metadataLayer + '/query?returnGeometry=false&geometry=' + centerPoint + '&inSR=4326&geometryType=esriGeometryPoint&outFields=*&f=json';
 
-         var _nodes = utilGetAllNodes(selectedIDs, context.graph());
+           if (!cache[tileID]) {
+             cache[tileID] = {};
+           }
 
-         var _coords = _nodes.map(function (n) {
-           return n.loc;
-         });
+           if (cache[tileID] && cache[tileID].metadata) {
+             return callback(null, cache[tileID].metadata);
+           } // accurate metadata is only available >= 13
 
-         var _extent = utilTotalExtent(selectedIDs, context.graph());
 
-         var _action = chooseAction();
+           if (metadataLayer === 99) {
+             vintage = {
+               start: null,
+               end: null,
+               range: null
+             };
+             metadata = {
+               vintage: null,
+               source: unknown,
+               description: unknown,
+               resolution: unknown,
+               accuracy: unknown
+             };
+             callback(null, metadata);
+           } else {
+             inflight[tileID] = true;
+             d3_json(url).then(function (result) {
+               delete inflight[tileID];
 
-         var _geometry;
+               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
 
-         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 = [];
 
-             for (var i = 0; i < selectedIDs.length; i++) {
-               var entity = context.entity(selectedIDs[i]);
+               var captureDate = localeDateString(result.features[0].attributes.SRC_DATE2);
+               vintage = {
+                 start: captureDate,
+                 end: captureDate,
+                 range: captureDate
+               };
+               metadata = {
+                 vintage: vintage,
+                 source: clean(result.features[0].attributes.NICE_NAME),
+                 description: clean(result.features[0].attributes.NICE_DESC),
+                 resolution: clean(+parseFloat(result.features[0].attributes.SRC_RES).toFixed(4)),
+                 accuracy: clean(+parseFloat(result.features[0].attributes.SRC_ACC).toFixed(4))
+               }; // append units - meters
 
-               if (entity.type === 'node') {
-                 continue;
-               } else if (entity.type !== 'way' || entity.isClosed()) {
-                 return null; // exit early, can't straighten these
+               if (isFinite(metadata.resolution)) {
+                 metadata.resolution += ' m';
                }
 
-               startNodeIDs.push(entity.first());
-               endNodeIDs.push(entity.last());
-             } // Remove duplicate end/startNodeIDs (duplicate nodes cannot be at the line end)
-
+               if (isFinite(metadata.accuracy)) {
+                 metadata.accuracy += ' m';
+               }
 
-             startNodeIDs = startNodeIDs.filter(function (n) {
-               return startNodeIDs.indexOf(n) === startNodeIDs.lastIndexOf(n);
+               cache[tileID].metadata = metadata;
+               if (callback) callback(null, metadata);
+             })["catch"](function (err) {
+               delete inflight[tileID];
+               if (callback) callback(err.message);
              });
-             endNodeIDs = endNodeIDs.filter(function (n) {
-               return endNodeIDs.indexOf(n) === endNodeIDs.lastIndexOf(n);
-             }); // Ensure all ways are connected (i.e. only 2 unique endpoints/startpoints)
+           }
 
-             if (utilArrayDifference(startNodeIDs, endNodeIDs).length + utilArrayDifference(endNodeIDs, startNodeIDs).length !== 2) return null; // Ensure path contains at least 3 unique nodes
+           function clean(val) {
+             return String(val).trim() || unknown;
+           }
+         };
 
-             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
+         return esri;
+       };
 
-             if (_nodeIDs.length === 2 && (wayNodeIDs.indexOf(_nodeIDs[0]) === -1 || wayNodeIDs.indexOf(_nodeIDs[1]) === -1)) return null;
+       rendererBackgroundSource.None = function () {
+         var source = rendererBackgroundSource({
+           id: 'none',
+           template: ''
+         });
 
-             if (_nodeIDs.length) {
-               // If we're only straightenting between two points, we only need that extent visible
-               _extent = utilTotalExtent(_nodeIDs, context.graph());
-             }
+         source.name = function () {
+           return _t('background.none');
+         };
 
-             _geometry = 'line';
-             return actionStraightenWay(selectedIDs, context.projection);
-           }
+         source.label = function () {
+           return _t.html('background.none');
+         };
 
+         source.imageryUsed = function () {
            return null;
-         }
-
-         function operation() {
-           if (!_action) return;
-           context.perform(_action, operation.annotation());
-           window.setTimeout(function () {
-             context.validator().validate();
-           }, 300); // after any transition
-         }
+         };
 
-         operation.available = function () {
-           return Boolean(_action);
+         source.area = function () {
+           return -1; // sources in background pane are sorted by area
          };
 
-         operation.disabled = function () {
-           var reason = _action.disabled(context.graph());
+         return 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';
-           }
+       rendererBackgroundSource.Custom = function (template) {
+         var source = rendererBackgroundSource({
+           id: 'custom',
+           template: template
+         });
 
-           return false;
+         source.name = function () {
+           return _t('background.custom');
+         };
 
-           function someMissing() {
-             if (context.inIntro()) return false;
-             var osm = context.connection();
+         source.label = function () {
+           return _t.html('background.custom');
+         };
 
-             if (osm) {
-               var missing = _coords.filter(function (loc) {
-                 return !osm.isDataLoaded(loc);
-               });
+         source.imageryUsed = function () {
+           // sanitize personal connection tokens - #6801
+           var cleaned = source.template(); // from query string parameters
 
-               if (missing.length) {
-                 missing.forEach(function (loc) {
-                   context.loadTileAtLoc(loc);
-                 });
-                 return 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
 
-             return false;
-           }
-         };
 
-         operation.tooltip = function () {
-           var disable = operation.disabled();
-           return disable ? _t('operations.straighten.' + disable + '.' + _amount) : _t('operations.straighten.description.' + _geometry + (_wayIDs.length === 1 ? '' : 's'));
+           cleaned = cleaned.replace(/token\/(\w+)/, 'token/{apikey}');
+           return 'Custom (' + cleaned + ' )';
          };
 
-         operation.annotation = function () {
-           return _t('operations.straighten.annotation.' + _geometry, {
-             n: _wayIDs.length ? _wayIDs.length : _nodeIDs.length
-           });
+         source.area = function () {
+           return -2; // sources in background pane are sorted by area
          };
 
-         operation.id = 'straighten';
-         operation.keys = [_t('operations.straighten.key')];
-         operation.title = _t('operations.straighten.title');
-         operation.behavior = behaviorOperation(context).which(operation);
-         return operation;
-       }
+         return source;
+       };
 
-       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
-       });
+       function rendererTileLayer(context) {
+         var transformProp = utilPrefixCSSProperty('Transform');
+         var tiler = utilTiler();
+         var _tileSize = 256;
 
-       var _relatedParent;
+         var _projection;
 
-       function modeSelect(context, selectedIDs) {
-         var mode = {
-           id: 'select',
-           button: 'browse'
-         };
-         var keybinding = utilKeybinding('select');
+         var _cache = {};
 
-         var _breatheBehavior = behaviorBreathe();
+         var _tileOrigin;
 
-         var _modeDragNode = modeDragNode(context);
+         var _zoom;
 
-         var _selectBehavior;
+         var _source;
 
-         var _behaviors = [];
-         var _operations = [];
-         var _newFeature = false;
-         var _follow = false;
+         function tileSizeAtZoom(d, z) {
+           var EPSILON = 0.002; // close seams
 
-         function singular() {
-           if (selectedIDs && selectedIDs.length === 1) {
-             return context.hasEntity(selectedIDs[0]);
-           }
+           return _tileSize * Math.pow(2, z - d[2]) / _tileSize + EPSILON;
          }
 
-         function selectedEntities() {
-           return selectedIDs.map(function (id) {
-             return context.hasEntity(id);
-           }).filter(Boolean);
+         function atZoom(t, distance) {
+           var power = Math.pow(2, distance);
+           return [Math.floor(t[0] * power), Math.floor(t[1] * power), t[2] + distance];
          }
 
-         function checkSelectedIDs() {
-           var ids = [];
-
-           if (Array.isArray(selectedIDs)) {
-             ids = selectedIDs.filter(function (id) {
-               return context.hasEntity(id);
-             });
-           }
-
-           if (!ids.length) {
-             context.enter(modeBrowse(context));
-             return false;
-           } else if (selectedIDs.length > 1 && ids.length === 1 || selectedIDs.length === 1 && ids.length > 1) {
-             // switch between single- and multi-select UI
-             context.enter(modeSelect(context, ids));
-             return false;
-           }
-
-           selectedIDs = ids;
-           return true;
-         } // find the common parent ways for nextVertex, previousVertex
-
-
-         function commonParents() {
-           var graph = context.graph();
-           var commonParents = [];
-
-           for (var i = 0; i < selectedIDs.length; i++) {
-             var entity = context.hasEntity(selectedIDs[i]);
-
-             if (!entity || entity.geometry(graph) !== 'vertex') {
-               return []; // selection includes some not vertices
-             }
-
-             var currParents = graph.parentWays(entity).map(function (w) {
-               return w.id;
-             });
+         function lookUp(d) {
+           for (var up = -1; up > -d[2]; up--) {
+             var tile = atZoom(d, up);
 
-             if (!commonParents.length) {
-               commonParents = currParents;
-               continue;
+             if (_cache[_source.url(tile)] !== false) {
+               return tile;
              }
+           }
+         }
 
-             commonParents = utilArrayIntersection(commonParents, currParents);
+         function uniqueBy(a, n) {
+           var o = [];
+           var seen = {};
 
-             if (!commonParents.length) {
-               return [];
+           for (var i = 0; i < a.length; i++) {
+             if (seen[a[i][n]] === undefined) {
+               o.push(a[i]);
+               seen[a[i][n]] = true;
              }
            }
 
-           return commonParents;
+           return o;
          }
 
-         function singularParent() {
-           var parents = commonParents();
-
-           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.
-
+         function addSource(d) {
+           d.push(_source.url(d));
+           return d;
+         } // Update tiles based on current state of `projection`.
 
-           if (parents.length === 1) {
-             _relatedParent = parents[0]; // remember this parent for later
 
-             return _relatedParent;
-           }
+         function background(selection) {
+           _zoom = geoScaleToZoom(_projection.scale(), _tileSize);
+           var pixelOffset;
 
-           if (parents.indexOf(_relatedParent) !== -1) {
-             return _relatedParent; // prefer the previously seen parent
+           if (_source) {
+             pixelOffset = [_source.offset()[0] * Math.pow(2, _zoom), _source.offset()[1] * Math.pow(2, _zoom)];
+           } else {
+             pixelOffset = [0, 0];
            }
 
-           return parents[0];
-         }
-
-         mode.selectedIDs = function (val) {
-           if (!arguments.length) return selectedIDs;
-           selectedIDs = val;
-           return mode;
-         };
-
-         mode.zoomToSelected = function () {
-           context.map().zoomToEase(selectedEntities());
-         };
-
-         mode.newFeature = function (val) {
-           if (!arguments.length) return _newFeature;
-           _newFeature = val;
-           return mode;
-         };
-
-         mode.selectBehavior = function (val) {
-           if (!arguments.length) return _selectBehavior;
-           _selectBehavior = val;
-           return mode;
-         };
+           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).
 
-         mode.follow = function (val) {
-           if (!arguments.length) return _follow;
-           _follow = val;
-           return mode;
-         };
 
-         function loadOperations() {
-           _operations.forEach(function (operation) {
-             if (operation.behavior) {
-               context.uninstall(operation.behavior);
-             }
-           });
+         function render(selection) {
+           if (!_source) return;
+           var requests = [];
+           var showDebug = context.getDebug('tile') && !_source.overlay;
 
-           _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();
-           });
+           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
 
-           _operations.forEach(function (operation) {
-             if (operation.behavior) {
-               context.install(operation.behavior);
-             }
-           }); // remove any displayed menu
+               requests.push(d);
 
+               if (_cache[d[3]] === false && lookUp(d)) {
+                 requests.push(addSource(lookUp(d)));
+               }
+             });
+             requests = uniqueBy(requests, 3).filter(function (r) {
+               // don't re-request tiles which have failed in the past
+               return _cache[r[3]] !== false;
+             });
+           }
 
-           context.ui().closeEditMenu();
-         }
+           function load(d3_event, d) {
+             _cache[d[3]] = true;
+             select(this).on('error', null).on('load', null).classed('tile-loaded', true);
+             render(selection);
+           }
 
-         mode.operations = function () {
-           return _operations;
-         };
+           function error(d3_event, d) {
+             _cache[d[3]] = false;
+             select(this).on('error', null).on('load', null).remove();
+             render(selection);
+           }
 
-         mode.enter = function () {
-           if (!checkSelectedIDs()) return;
-           context.features().forceVisible(selectedIDs);
+           function imageTransform(d) {
+             var ts = _tileSize * Math.pow(2, _zoom - d[2]);
 
-           _modeDragNode.restoreSelectedIDs(selectedIDs);
+             var scale = tileSizeAtZoom(d, _zoom);
+             return 'translate(' + (d[0] * ts - _tileOrigin[0]) + 'px,' + (d[1] * ts - _tileOrigin[1]) + 'px) ' + 'scale(' + scale + ',' + scale + ')';
+           }
 
-           loadOperations();
+           function tileCenter(d) {
+             var ts = _tileSize * Math.pow(2, _zoom - d[2]);
 
-           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];
+             return [d[0] * ts - _tileOrigin[0] + ts / 2, d[1] * ts - _tileOrigin[1] + ts / 2];
            }
 
-           _behaviors.forEach(context.install);
+           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)
 
-           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
 
-             selectElements();
-           }).on('undone.select', checkSelectedIDs).on('redone.select', checkSelectedIDs);
-           context.map().on('drawn.select', selectElements).on('crossEditableZoom.select', function () {
-             selectElements();
+           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);
 
-             _breatheBehavior.restartIfNeeded(context.surface());
+             if (dist < minDist) {
+               minDist = dist;
+               nearCenter = d;
+             }
            });
-           context.map().doubleUpHandler().on('doubleUp.modeSelect', didDoubleUp);
-           selectElements();
-
-           if (_follow) {
-             var extent = geoExtent();
-             var graph = context.graph();
-             selectedIDs.forEach(function (id) {
-               var entity = context.entity(id);
-
-               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
-
-             _follow = false;
-           }
+           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();
 
-           function nudgeSelection(delta) {
-             return function () {
-               // prevent nudging during low zoom selection
-               if (!context.map().withinEditableZoom()) return;
-               var moveOp = operationMove(context, selectedIDs);
+           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));
 
-               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();
-               }
-             };
+               _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'));
+               });
+             });
            }
+         }
 
-           function scaleSelection(factor) {
-             return function () {
-               // prevent scaling during low zoom selection
-               if (!context.map().withinEditableZoom()) return;
-               var nodes = utilGetAllNodes(selectedIDs, context.graph());
-               var isUp = factor > 1; // can only scale if multiple nodes are selected
-
-               if (nodes.length <= 1) return;
-               var extent = utilTotalExtent(selectedIDs, context.graph()); // These disabled checks would normally be handled by an operation
-               // object, but we don't want an actual scale operation at this point.
+         background.projection = function (val) {
+           if (!arguments.length) return _projection;
+           _projection = val;
+           return background;
+         };
 
-               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';
-                 }
+         background.dimensions = function (val) {
+           if (!arguments.length) return tiler.size();
+           tiler.size(val);
+           return background;
+         };
 
-                 return false;
+         background.source = function (val) {
+           if (!arguments.length) return _source;
+           _source = val;
+           _tileSize = _source.tileSize;
+           _cache = {};
+           tiler.tileSize(_source.tileSize).zoomExtent(_source.zoomExtent);
+           return background;
+         };
 
-                 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);
-                 }
+         return background;
+       }
 
-                 function someMissing() {
-                   if (context.inIntro()) return false;
-                   var osm = context.connection();
+       var _imageryIndex = null;
+       function rendererBackground(context) {
+         var dispatch = dispatch$8('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;
 
-                   if (osm) {
-                     var missing = nodes.filter(function (n) {
-                       return !osm.isDataLoaded(n.loc);
-                     });
+         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
 
-                     if (missing.length) {
-                       missing.forEach(function (loc) {
-                         context.loadTileAtLoc(loc);
-                       });
-                       return true;
-                     }
-                   }
+             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]] ]
 
-                   return false;
+               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
 
-                 function incompleteRelation(id) {
-                   var entity = context.entity(id);
-                   return entity.type === 'relation' && !entity.isComplete(context.graph());
-                 }
+             _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 disabled = scalingDisabled();
+             _imageryIndex.backgrounds.unshift(rendererBackgroundSource.None()); // Add 'Custom'
 
-               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();
-               }
-             };
-           }
 
-           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;
+             var template = corePreferences('background-custom-template') || '';
+             var custom = rendererBackgroundSource.Custom(template);
 
-             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'));
-             }
-           }
+             _imageryIndex.backgrounds.unshift(custom);
 
-           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();
+             return _imageryIndex;
+           });
+         }
 
-             if (_relatedParent) {
-               surface.selectAll(utilEntitySelector([_relatedParent])).classed('related', true);
-             }
+         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().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);
+           if (context.map().zoom() > 18) {
+             if (currSource && /^EsriWorldImagery/.test(currSource.id)) {
+               var center = context.map().center();
+               currSource.fetchTilemap(center);
              }
-           }
-
-           function esc() {
-             if (context.container().select('.combobox').size()) return;
-             context.enter(modeBrowse(context));
-           }
+           } // Is the imagery valid here? - #4827
 
-           function firstVertex(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);
-             }
+           var sources = background.sources(context.map().extent());
+           var wasValid = _isValid;
+           _isValid = !!sources.filter(function (d) {
+             return d === currSource;
+           }).length;
 
-             if (way) {
-               context.enter(modeSelect(context, [way.first()]).follow(true));
-             }
+           if (wasValid !== _isValid) {
+             // change in valid status
+             background.updateImagery();
            }
 
-           function lastVertex(d3_event) {
-             d3_event.preventDefault();
-             var entity = singular();
-             var parent = singularParent();
-             var way;
+           var baseFilter = '';
 
-             if (entity && entity.type === 'way') {
-               way = entity;
-             } else if (parent) {
-               way = context.entity(parent);
+           if (detected.cssfilters) {
+             if (_brightness !== 1) {
+               baseFilter += " brightness(".concat(_brightness, ")");
              }
 
-             if (way) {
-               context.enter(modeSelect(context, [way.last()]).follow(true));
+             if (_contrast !== 1) {
+               baseFilter += " contrast(".concat(_contrast, ")");
              }
-           }
-
-           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 (curr > 0) {
-               index = curr - 1;
-             } else if (way.isClosed()) {
-               index = length - 2;
+             if (_saturation !== 1) {
+               baseFilter += " saturate(".concat(_saturation, ")");
              }
 
-             if (index !== -1) {
-               context.enter(modeSelect(context, [way.nodes[index]]).follow(true));
+             if (_sharpness < 1) {
+               // gaussian blur
+               var blur = d3_interpolateNumber(0.5, 5)(1 - _sharpness);
+               baseFilter += " blur(".concat(blur, "px)");
              }
            }
 
-           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;
+           var base = selection.selectAll('.layer-background').data([0]);
+           base = base.enter().insert('div', '.layer-data').attr('class', 'layer layer-background').merge(base);
 
-             if (curr < length - 1) {
-               index = curr + 1;
-             } else if (way.isClosed()) {
-               index = 0;
-             }
+           if (detected.cssfilters) {
+             base.style('filter', baseFilter || null);
+           } else {
+             base.style('opacity', _brightness);
+           }
 
-             if (index !== -1) {
-               context.enter(modeSelect(context, [way.nodes[index]]).follow(true));
-             }
+           var imagery = base.selectAll('.layer-imagery').data([0]);
+           imagery.enter().append('div').attr('class', 'layer layer-imagery').merge(imagery).call(baseLayer);
+           var maskFilter = '';
+           var mixBlendMode = '';
+
+           if (detected.cssfilters && _sharpness > 1) {
+             // apply unsharp mask
+             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, ")");
            }
 
-           function nextParent(d3_event) {
-             d3_event.preventDefault();
-             var parents = commonParents();
-             if (!parents || parents.length < 2) return;
-             var index = parents.indexOf(_relatedParent);
+           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);
+           });
+         }
 
-             if (index < 0 || index > parents.length - 2) {
-               _relatedParent = parents[0];
-             } else {
-               _relatedParent = parents[index + 1];
-             }
+         background.updateImagery = function () {
+           var currSource = baseLayer.source();
+           if (context.inIntro() || !currSource) return;
 
-             var surface = context.surface();
-             surface.selectAll('.related').classed('related', false);
+           var o = _overlayLayers.filter(function (d) {
+             return !d.source().isLocatorOverlay() && !d.source().isHidden();
+           }).map(function (d) {
+             return d.source().id;
+           }).join(',');
 
-             if (_relatedParent) {
-               surface.selectAll(utilEntitySelector([_relatedParent])).classed('related', true);
-             }
+           var meters = geoOffsetToMeters(currSource.offset());
+           var EPSILON = 0.01;
+           var x = +meters[0].toFixed(2);
+           var y = +meters[1].toFixed(2);
+           var hash = utilStringQs(window.location.hash);
+           var id = currSource.id;
+
+           if (id === 'custom') {
+             id = "custom:".concat(currSource.template());
            }
-         };
 
-         mode.exit = function () {
-           _newFeature = false;
+           if (id) {
+             hash.background = id;
+           } else {
+             delete hash.background;
+           }
 
-           _operations.forEach(function (operation) {
-             if (operation.behavior) {
-               context.uninstall(operation.behavior);
-             }
-           });
+           if (o) {
+             hash.overlays = o;
+           } else {
+             delete hash.overlays;
+           }
 
-           _operations = [];
+           if (Math.abs(x) > EPSILON || Math.abs(y) > EPSILON) {
+             hash.offset = "".concat(x, ",").concat(y);
+           } else {
+             delete hash.offset;
+           }
 
-           _behaviors.forEach(context.uninstall);
+           if (!window.mocha) {
+             window.location.replace('#' + utilQsString(hash, true));
+           }
 
-           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 imageryUsed = [];
+           var photoOverlaysUsed = [];
+           var currUsed = currSource.imageryUsed();
 
-           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'));
+           if (currUsed && _isValid) {
+             imageryUsed.push(currUsed);
            }
-         };
-
-         return mode;
-       }
 
-       function uiLasso(context) {
-         var group, polygon;
-         lasso.coordinates = [];
+           _overlayLayers.filter(function (d) {
+             return !d.source().isLocatorOverlay() && !d.source().isHidden();
+           }).forEach(function (d) {
+             return imageryUsed.push(d.source().imageryUsed());
+           });
 
-         function lasso(selection) {
-           context.container().classed('lasso', true);
-           group = selection.append('g').attr('class', 'lasso hide');
-           polygon = group.append('path').attr('class', 'lasso-path');
-           group.call(uiToggle(true));
-         }
+           var dataLayer = context.layers().layer('data');
 
-         function draw() {
-           if (polygon) {
-             polygon.data([lasso.coordinates]).attr('d', function (d) {
-               return 'M' + d.join(' L') + ' Z';
-             });
+           if (dataLayer && dataLayer.enabled() && dataLayer.hasData()) {
+             imageryUsed.push(dataLayer.getSrc());
            }
-         }
 
-         lasso.extent = function () {
-           return lasso.coordinates.reduce(function (extent, point) {
-             return extent.extend(geoExtent(point));
-           }, geoExtent());
-         };
+           var photoOverlayLayers = {
+             streetside: 'Bing Streetside',
+             mapillary: 'Mapillary Images',
+             'mapillary-map-features': 'Mapillary Map Features',
+             'mapillary-signs': 'Mapillary Signs',
+             openstreetcam: 'OpenStreetCam Images'
+           };
 
-         lasso.p = function (_) {
-           if (!arguments.length) return lasso;
-           lasso.coordinates.push(_);
-           draw();
-           return lasso;
-         };
+           for (var layerID in photoOverlayLayers) {
+             var layer = context.layers().layer(layerID);
 
-         lasso.close = function () {
-           if (group) {
-             group.call(uiToggle(false, function () {
-               select(this).remove();
-             }));
+             if (layer && layer.enabled()) {
+               photoOverlaysUsed.push(layerID);
+               imageryUsed.push(photoOverlayLayers[layerID]);
+             }
            }
 
-           context.container().classed('lasso', false);
+           context.history().imageryUsed(imageryUsed);
+           context.history().photoOverlaysUsed(photoOverlaysUsed);
          };
 
-         return lasso;
-       }
+         var _checkedBlocklists;
 
-       function behaviorLasso(context) {
-         // use pointer events on supported platforms; fallback to mouse events
-         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+         background.sources = function (extent, zoom, includeCurrent) {
+           if (!_imageryIndex) return []; // called before init()?
 
-         var behavior = function behavior(selection) {
-           var lasso;
+           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();
 
-           function pointerdown(d3_event) {
-             var button = 0; // left
+           if (blocklists && blocklists !== _checkedBlocklists) {
+             _imageryIndex.backgrounds.forEach(function (source) {
+               source.isBlocked = blocklists.some(function (blocklist) {
+                 return blocklist.test(source.template());
+               });
+             });
 
-             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();
-             }
+             _checkedBlocklists = blocklists;
            }
 
-           function pointermove() {
-             if (!lasso) {
-               lasso = uiLasso(context);
-               context.surface().call(lasso);
-             }
-
-             lasso.p(context.map().mouse());
-           }
+           return _imageryIndex.backgrounds.filter(function (source) {
+             if (includeCurrent && currSource === source) return true; // optionally always include the current imagery
 
-           function normalize(a, b) {
-             return [[Math.min(a[0], b[0]), Math.min(a[1], b[1])], [Math.max(a[0], b[0]), Math.max(a[1], b[1])]];
-           }
+             if (source.isBlocked) return false; // even bundled sources may be blocked - #7905
 
-           function lassoed() {
-             if (!lasso) return [];
-             var graph = context.graph();
-             var limitToNodes;
+             if (!source.polygon) return true; // always include imagery with worldwide coverage
 
-             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 [];
-             }
+             if (zoom && zoom < 6) return false; // optionally exclude local imagery at low zooms
 
-             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
+             return visible[source.id]; // include imagery visible in given extent
+           });
+         };
 
-             intersects.sort(function (node1, node2) {
-               var parents1 = graph.parentWays(node1);
-               var parents2 = graph.parentWays(node2);
+         background.dimensions = function (val) {
+           if (!val) return;
+           baseLayer.dimensions(val);
 
-               if (parents1.length && parents2.length) {
-                 // both nodes are vertices
-                 var sharedParents = utilArrayIntersection(parents1, parents2);
+           _overlayLayers.forEach(function (layer) {
+             return layer.dimensions(val);
+           });
+         };
 
-                 if (sharedParents.length) {
-                   var sharedParentNodes = sharedParents[0].nodes; // vertices are members of the same way; sort them in their listed order
+         background.baseLayerSource = function (d) {
+           if (!arguments.length) return baseLayer.source(); // test source against OSM imagery blocklists..
 
-                   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 osm = context.connection();
+           if (!osm) return background;
+           var blocklists = osm.imageryBlocklists();
+           var template = d.template();
+           var fail = false;
+           var tested = 0;
+           var regex;
+
+           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.
 
 
-               return node1.loc[0] - node2.loc[0];
-             });
-             return intersects.map(function (entity) {
-               return entity.id;
-             });
+           if (!tested) {
+             regex = /.*\.google(apis)?\..*\/(vt|kh)[\?\/].*([xyz]=.*){3}.*/;
+             fail = regex.test(template);
            }
 
-           function pointerup() {
-             select(window).on(_pointerPrefix + 'move.lasso', null).on(_pointerPrefix + 'up.lasso', null);
-             if (!lasso) return;
-             var ids = lassoed();
-             lasso.close();
+           baseLayer.source(!fail ? d : background.findSource('none'));
+           dispatch.call('change');
+           background.updateImagery();
+           return background;
+         };
 
-             if (ids.length) {
-               context.enter(modeSelect(context, ids));
-             }
-           }
+         background.findSource = function (id) {
+           if (!id || !_imageryIndex) return null; // called before init()?
 
-           selection.on(_pointerPrefix + 'down.lasso', pointerdown);
+           return _imageryIndex.backgrounds.find(function (d) {
+             return d.id && d.id === id;
+           });
          };
 
-         behavior.off = function (selection) {
-           selection.on(_pointerPrefix + 'down.lasso', null);
+         background.bing = function () {
+           background.baseLayerSource(background.findSource('Bing'));
          };
 
-         return behavior;
-       }
+         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;
+           });
+         };
 
-       function modeBrowse(context) {
-         var mode = {
-           button: 'browse',
-           id: 'browse',
-           title: _t('modes.browse.title'),
-           description: _t('modes.browse.description')
+         background.overlayLayerSources = function () {
+           return _overlayLayers.map(function (layer) {
+             return layer.source();
+           });
          };
-         var sidebar;
 
-         var _selectBehavior;
+         background.toggleOverlayLayer = function (d) {
+           var layer;
 
-         var _behaviors = [];
+           for (var i = 0; i < _overlayLayers.length; i++) {
+             layer = _overlayLayers[i];
 
-         mode.selectBehavior = function (val) {
-           if (!arguments.length) return _selectBehavior;
-           _selectBehavior = val;
-           return mode;
-         };
+             if (layer.source() === d) {
+               _overlayLayers.splice(i, 1);
 
-         mode.enter = function () {
-           if (!_behaviors.length) {
-             if (!_selectBehavior) _selectBehavior = behaviorSelect(context);
-             _behaviors = [behaviorPaste(context), behaviorHover(context).on('hover', context.ui().sidebar.hover), _selectBehavior, behaviorLasso(context), modeDragNode(context).behavior, modeDragNote(context).behavior];
+               dispatch.call('change');
+               background.updateImagery();
+               return;
+             }
            }
 
-           _behaviors.forEach(context.install); // Get focus on the body.
-
+           layer = rendererTileLayer(context).source(d).projection(context.projection).dimensions(baseLayer.dimensions());
 
-           if (document.activeElement && document.activeElement.blur) {
-             document.activeElement.blur();
-           }
+           _overlayLayers.push(layer);
 
-           if (sidebar) {
-             context.ui().sidebar.show(sidebar);
-           } else {
-             context.ui().sidebar.select(null);
-           }
+           dispatch.call('change');
+           background.updateImagery();
          };
 
-         mode.exit = function () {
-           context.ui().sidebar.hover.cancel();
-
-           _behaviors.forEach(context.uninstall);
+         background.nudge = function (d, zoom) {
+           var currSource = baseLayer.source();
 
-           if (sidebar) {
-             context.ui().sidebar.hide();
+           if (currSource) {
+             currSource.nudge(d, zoom);
+             dispatch.call('change');
+             background.updateImagery();
            }
-         };
 
-         mode.sidebar = function (_) {
-           if (!arguments.length) return sidebar;
-           sidebar = _;
-           return mode;
+           return background;
          };
 
-         mode.operations = function () {
-           return [operationPaste(context)];
-         };
+         background.offset = function (d) {
+           var currSource = baseLayer.source();
 
-         return mode;
-       }
+           if (!arguments.length) {
+             return currSource && currSource.offset() || [0, 0];
+           }
 
-       function behaviorAddWay(context) {
-         var dispatch$1 = dispatch('start', 'startFromWay', 'startFromNode');
-         var draw = behaviorDraw(context);
+           if (currSource) {
+             currSource.offset(d);
+             dispatch.call('change');
+             background.updateImagery();
+           }
 
-         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);
-         }
+           return background;
+         };
 
-         behavior.off = function (surface) {
-           surface.call(draw.off);
+         background.brightness = function (d) {
+           if (!arguments.length) return _brightness;
+           _brightness = d;
+           if (context.mode()) dispatch.call('change');
+           return background;
          };
 
-         behavior.cancel = function () {
-           window.setTimeout(function () {
-             context.map().dblclickZoomEnable(true);
-           }, 1000);
-           context.enter(modeBrowse(context));
+         background.contrast = function (d) {
+           if (!arguments.length) return _contrast;
+           _contrast = d;
+           if (context.mode()) dispatch.call('change');
+           return background;
          };
 
-         return utilRebind(behavior, dispatch$1, 'on');
-       }
+         background.saturation = function (d) {
+           if (!arguments.length) return _saturation;
+           _saturation = d;
+           if (context.mode()) dispatch.call('change');
+           return background;
+         };
 
-       function behaviorHash(context) {
-         // cached window.location.hash
-         var _cachedHash = null; // allowable latitude range
+         background.sharpness = function (d) {
+           if (!arguments.length) return _sharpness;
+           _sharpness = d;
+           if (context.mode()) dispatch.call('change');
+           return background;
+         };
 
-         var _latitudeLimit = 90 - 1e-8;
+         var _loadPromise;
 
-         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);
-           });
+         background.ensureLoaded = function () {
+           if (_loadPromise) return _loadPromise;
 
-           if (selected.length) {
-             newParams.id = selected.join(',');
+           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
            }
 
-           newParams.map = zoom.toFixed(2) + '/' + center[1].toFixed(precision) + '/' + center[0].toFixed(precision);
-           return Object.assign(oldParams, newParams);
-         }
-
-         function computedHash() {
-           return '#' + utilQsString(computedHashParameters(), true);
-         }
+           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 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 (!requested && extent) {
+               best = background.sources(extent).find(function (s) {
+                 return s.best();
+               });
+             } // Decide which background layer to display
 
-           if (selected.length) {
-             var firstLabel = utilDisplayLabel(context.entity(selected[0]), context.graph());
 
-             if (selected.length > 1) {
-               contextual = _t('title.labeled_and_more', {
-                 labeled: firstLabel,
-                 count: selected.length - 1
-               });
+             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 {
-               contextual = firstLabel;
+               background.baseLayerSource(background.findSource(requested) || best || background.findSource(corePreferences('background-last-used')) || background.findSource('Bing') || first || background.findSource('none'));
              }
 
-             titleID = 'context';
-           }
-
-           if (includeChangeCount) {
-             changeCount = context.history().difference().summary().length;
+             var locator = imageryIndex.backgrounds.find(function (d) {
+               return d.overlay && d["default"];
+             });
 
-             if (changeCount > 0) {
-               titleID = contextual ? 'changes_context' : 'changes';
+             if (locator) {
+               background.toggleOverlayLayer(locator);
              }
-           }
 
-           if (titleID) {
-             return _t('title.format.' + titleID, {
-               changes: changeCount,
-               base: baseTitle,
-               context: contextual
+             var overlays = (hash.overlays || '').split(',');
+             overlays.forEach(function (overlay) {
+               overlay = background.findSource(overlay);
+
+               if (overlay) {
+                 background.toggleOverlayLayer(overlay);
+               }
              });
-           }
 
-           return baseTitle;
-         }
+             if (hash.gpx) {
+               var gpx = context.layers().layer('data');
 
-         function updateTitle(includeChangeCount) {
-           if (!context.setsDocumentTitle()) return;
-           var newTitle = computedTitle(includeChangeCount);
+               if (gpx) {
+                 gpx.url(hash.gpx, '.gpx');
+               }
+             }
 
-           if (document.title !== newTitle) {
-             document.title = newTitle;
-           }
-         }
+             if (hash.offset) {
+               var offset = hash.offset.replace(/;/g, ',').split(',').map(function (n) {
+                 return !isNaN(n) && n;
+               });
 
-         function updateHashIfNeeded() {
-           if (context.inIntro()) return;
-           var latestHash = computedHash();
+               if (offset.length === 2) {
+                 background.offset(geoMetersToOffset(offset));
+               }
+             }
+           })["catch"](function () {
+             /* ignore */
+           });
+         };
 
-           if (_cachedHash !== latestHash) {
-             _cachedHash = latestHash; // Update the URL hash without affecting the browser navigation stack,
-             // though unavoidably creating a browser history entry
+         return utilRebind(background, dispatch, 'on');
+       }
 
-             window.history.replaceState(null, computedTitle(false
-             /* includeChangeCount */
-             ), latestHash); // set the title we want displayed for the browser tab/window
+       function rendererFeatures(context) {
+         var dispatch = dispatch$8('change', 'redraw');
+         var features = utilRebind({}, dispatch, 'on');
 
-             updateTitle(true
-             /* includeChangeCount */
-             );
-           }
-         }
+         var _deferred = new Set();
 
-         var _throttledUpdate = throttle(updateHashIfNeeded, 500);
+         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 = {};
 
-         var _throttledUpdateTitle = throttle(function () {
-           updateTitle(true
-           /* includeChangeCount */
-           );
-         }, 500);
+         function update() {
+           if (!window.mocha) {
+             var hash = utilStringQs(window.location.hash);
+             var disabled = features.disabled();
 
-         function hashchange() {
-           // ignore spurious hashchange events
-           if (window.location.hash === _cachedHash) return;
-           _cachedHash = window.location.hash;
-           var q = utilStringQs(_cachedHash);
-           var mapArgs = (q.map || '').split('/').map(Number);
+             if (disabled.length) {
+               hash.disable_features = disabled.join(',');
+             } else {
+               delete hash.disable_features;
+             }
 
-           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]);
+             window.location.replace('#' + utilQsString(hash, true));
+             corePreferences('disabled-features', disabled.join(','));
+           }
 
-             if (q.id && mode) {
-               var ids = q.id.split(',').filter(function (id) {
-                 return context.hasEntity(id);
-               });
+           _hidden = features.hidden();
+           dispatch.call('change');
+           dispatch.call('redraw');
+         }
 
-               if (ids.length && (mode.id === 'browse' || mode.id === 'select' && !utilArrayIdentical(mode.selectedIDs(), ids))) {
-                 context.enter(modeSelect(context, ids));
-                 return;
-               }
-             }
+         function defineRule(k, filter, max) {
+           var isEnabled = true;
 
-             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
+           _keys.push(k);
 
-             if (mode && mode.id.match(/^draw/) !== null && dist > maxdist) {
-               context.enter(modeBrowse(context));
-               return;
+           _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 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 (window.location.hash) {
-             var q = utilStringQs(window.location.hash);
+         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 (q.id) {
-               //if (!context.history().hasRestorableChanges()) {
-               // targeting specific features: download, select, and zoom to them
-               context.zoomToEntity(q.id.split(',')[0], !q.map); //}
-             }
+         defineRule('past_future', function isPastFuture(tags) {
+           if (traffic_roads[tags.highway] || service_roads[tags.highway] || paths[tags.highway]) {
+             return false;
+           }
 
-             if (q.walkthrough === 'true') {
-               behavior.startWalkthrough = true;
-             }
+           var strings = Object.keys(tags);
 
-             if (q.map) {
-               behavior.hadHash = true;
-             }
+           for (var i = 0; i < strings.length; i++) {
+             var s = strings[i];
 
-             hashchange();
-             updateTitle(false);
+             if (past_futures[s] || past_futures[tags[s]]) {
+               return true;
+             }
            }
-         }
 
-         behavior.off = function () {
-           _throttledUpdate.cancel();
+           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`
 
-           _throttledUpdateTitle.cancel();
+         defineRule('others', function isOther(tags, geometry) {
+           return geometry === 'line' || geometry === 'area';
+         });
 
-           context.map().on('move.behaviorHash', null);
-           context.on('enter.behaviorHash', null);
-           select(window).on('hashchange.behaviorHash', null);
-           window.location.hash = '';
+         features.features = function () {
+           return _rules;
          };
 
-         return behavior;
-       }
+         features.keys = function () {
+           return _keys;
+         };
 
-       /*
-           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.
-        */
+         features.enabled = function (k) {
+           if (!arguments.length) {
+             return _keys.filter(function (k) {
+               return _rules[k].enabled;
+             });
+           }
 
-       function coreDifference(base, head) {
-         var _changes = {};
-         var _didChange = {}; // 'addition', 'deletion', 'geometry', 'properties'
+           return _rules[k] && _rules[k].enabled;
+         };
 
-         var _diff = {};
+         features.disabled = function (k) {
+           if (!arguments.length) {
+             return _keys.filter(function (k) {
+               return !_rules[k].enabled;
+             });
+           }
 
-         function checkEntityID(id) {
-           var h = head.entities[id];
-           var b = base.entities[id];
-           if (h === b) return;
-           if (_changes[id]) return;
+           return _rules[k] && !_rules[k].enabled;
+         };
 
-           if (!h && b) {
-             _changes[id] = {
-               base: b,
-               head: h
-             };
-             _didChange.deletion = true;
-             return;
+         features.hidden = function (k) {
+           if (!arguments.length) {
+             return _keys.filter(function (k) {
+               return _rules[k].hidden();
+             });
            }
 
-           if (h && !b) {
-             _changes[id] = {
-               base: b,
-               head: h
-             };
-             _didChange.addition = true;
-             return;
-           }
+           return _rules[k] && _rules[k].hidden();
+         };
 
-           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;
-             }
+         features.autoHidden = function (k) {
+           if (!arguments.length) {
+             return _keys.filter(function (k) {
+               return _rules[k].autoHidden();
+             });
+           }
 
-             if (h.loc && b.loc && !geoVecEqual(h.loc, b.loc)) {
-               _changes[id] = {
-                 base: b,
-                 head: h
-               };
-               _didChange.geometry = true;
-             }
+           return _rules[k] && _rules[k].autoHidden();
+         };
 
-             if (h.nodes && b.nodes && !fastDeepEqual(h.nodes, b.nodes)) {
-               _changes[id] = {
-                 base: b,
-                 head: h
-               };
-               _didChange.geometry = true;
-             }
+         features.enable = function (k) {
+           if (_rules[k] && !_rules[k].enabled) {
+             _rules[k].enable();
 
-             if (h.tags && b.tags && !fastDeepEqual(h.tags, b.tags)) {
-               _changes[id] = {
-                 base: b,
-                 head: h
-               };
-               _didChange.properties = true;
-             }
+             update();
            }
-         }
+         };
 
-         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)));
+         features.enableAll = function () {
+           var didEnable = false;
 
-           for (var i = 0; i < ids.length; i++) {
-             checkEntityID(ids[i]);
-           }
-         }
+           for (var k in _rules) {
+             if (!_rules[k].enabled) {
+               didEnable = true;
 
-         load();
+               _rules[k].enable();
+             }
+           }
 
-         _diff.length = function length() {
-           return Object.keys(_changes).length;
+           if (didEnable) update();
          };
 
-         _diff.changes = function changes() {
-           return _changes;
-         };
+         features.disable = function (k) {
+           if (_rules[k] && _rules[k].enabled) {
+             _rules[k].disable();
 
-         _diff.didChange = _didChange; // pass true to include affected relation members
+             update();
+           }
+         };
 
-         _diff.extantIDs = function extantIDs(includeRelMembers) {
-           var result = new Set();
-           Object.keys(_changes).forEach(function (id) {
-             if (_changes[id].head) {
-               result.add(id);
-             }
+         features.disableAll = function () {
+           var didDisable = false;
 
-             var h = _changes[id].head;
-             var b = _changes[id].base;
-             var entity = h || b;
+           for (var k in _rules) {
+             if (_rules[k].enabled) {
+               didDisable = 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);
-                 }
-               });
+               _rules[k].disable();
              }
-           });
-           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);
-             }
-           });
-           return result;
+           if (didDisable) update();
          };
 
-         _diff.created = function created() {
-           var result = [];
-           Object.values(_changes).forEach(function (change) {
-             if (!change.base && change.head) {
-               result.push(change.head);
-             }
-           });
-           return result;
+         features.toggle = function (k) {
+           if (_rules[k]) {
+             (function (f) {
+               return f.enabled ? f.disable() : f.enable();
+             })(_rules[k]);
+
+             update();
+           }
          };
 
-         _diff.deleted = function deleted() {
-           var result = [];
-           Object.values(_changes).forEach(function (change) {
-             if (change.base && !change.head) {
-               result.push(change.base);
-             }
-           });
-           return result;
+         features.resetStats = function () {
+           for (var i = 0; i < _keys.length; i++) {
+             _rules[_keys[i]].count = 0;
+           }
+
+           dispatch.call('change');
          };
 
-         _diff.summary = function summary() {
-           var relevant = {};
-           var keys = Object.keys(_changes);
+         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 (var i = 0; i < keys.length; i++) {
-             var change = _changes[keys[i]];
+           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..
 
-             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 (moved) {
-                 addParents(change.head);
-               }
+           _cullFactor = dimensions[0] * dimensions[1] / 1000000;
 
-               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');
+           for (i = 0; i < entities.length; i++) {
+             geometry = entities[i].geometry(resolver);
+             matches = Object.keys(features.getMatches(entities[i], resolver, geometry));
+
+             for (j = 0; j < matches.length; j++) {
+               _rules[matches[j]].count++;
              }
            }
 
-           return Object.values(relevant);
+           currHidden = features.hidden();
 
-           function addEntity(entity, graph, changeType) {
-             relevant[entity.id] = {
-               entity: entity,
-               graph: graph,
-               changeType: changeType
-             };
+           if (currHidden !== _hidden) {
+             _hidden = currHidden;
+             needsRedraw = true;
+             dispatch.call('change');
            }
 
-           function addParents(entity) {
-             var parents = head.parentWays(entity);
+           return needsRedraw;
+         };
 
-             for (var j = parents.length - 1; j >= 0; j--) {
-               var parent = parents[j];
+         features.stats = function () {
+           for (var i = 0; i < _keys.length; i++) {
+             _stats[_keys[i]] = _rules[_keys[i]].count;
+           }
 
-               if (!(parent.id in relevant)) {
-                 addEntity(parent, head, 'modified');
-               }
-             }
+           return _stats;
+         };
+
+         features.clear = function (d) {
+           for (var i = 0; i < d.length; i++) {
+             features.clearEntity(d[i]);
            }
-         }; // returns complete set of entities that require a redraw
-         //  (optionally within given `extent`)
+         };
 
+         features.clearEntity = function (entity) {
+           delete _cache[osmEntity.key(entity)];
+         };
 
-         _diff.complete = function complete(extent) {
-           var result = {};
-           var id, change;
+         features.reset = function () {
+           Array.from(_deferred).forEach(function (handle) {
+             window.cancelIdleCallback(handle);
 
-           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;
+             _deferred["delete"](handle);
+           });
+           _cache = {};
+         }; // only certain relations are worth checking
 
-             if (entity.type === 'way') {
-               var nh = h ? h.nodes : [];
-               var nb = b ? b.nodes : [];
-               var diff;
-               diff = utilArrayDifference(nh, nb);
 
-               for (i = 0; i < diff.length; i++) {
-                 result[diff[i]] = head.hasEntity(diff[i]);
-               }
+         function relationShouldBeChecked(relation) {
+           // multipolygon features have `area` geometry and aren't checked here
+           return relation.tags.type === 'boundary';
+         }
 
-               diff = utilArrayDifference(nb, nh);
+         features.getMatches = function (entity, resolver, geometry) {
+           if (geometry === 'vertex' || geometry === 'relation' && !relationShouldBeChecked(entity)) return {};
+           var ent = osmEntity.key(entity);
 
-               for (i = 0; i < diff.length; i++) {
-                 result[diff[i]] = head.hasEntity(diff[i]);
-               }
-             }
+           if (!_cache[ent]) {
+             _cache[ent] = {};
+           }
 
-             if (entity.type === 'relation' && entity.isMultipolygon()) {
-               var mh = h ? h.members.map(function (m) {
-                 return m.id;
-               }) : [];
-               var mb = b ? b.members.map(function (m) {
-                 return m.id;
-               }) : [];
-               var ids = utilArrayUnion(mh, mb);
+           if (!_cache[ent].matches) {
+             var matches = {};
+             var hasMatch = false;
 
-               for (i = 0; i < ids.length; i++) {
-                 var member = head.hasEntity(ids[i]);
-                 if (!member) continue; // not downloaded
+             for (var i = 0; i < _keys.length; i++) {
+               if (_keys[i] === 'others') {
+                 if (hasMatch) continue; // If an entity...
+                 //   1. is a way that hasn't matched other 'interesting' feature rules,
 
-                 if (extent && !member.intersects(extent, head)) continue; // not visible
+                 if (entity.type === 'way') {
+                   var parents = features.getParents(entity, resolver, geometry); //   2a. belongs only to a single multipolygon relation
 
-                 result[ids[i]] = member;
-               }
-             }
+                   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]);
 
-             addParents(head.parentWays(entity), result);
-             addParents(head.parentRelations(entity), result);
-           }
+                     if (_cache[pkey] && _cache[pkey].matches) {
+                       matches = Object.assign({}, _cache[pkey].matches); // shallow copy
 
-           return result;
+                       continue;
+                     }
+                   }
+                 }
+               }
 
-           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 (_rules[_keys[i]].filter(entity.tags, geometry)) {
+                 matches[_keys[i]] = hasMatch = true;
+               }
              }
+
+             _cache[ent].matches = matches;
            }
+
+           return _cache[ent].matches;
          };
 
-         return _diff;
-       }
+         features.getParents = function (entity, resolver, geometry) {
+           if (geometry === 'point') return [];
+           var ent = osmEntity.key(entity);
 
-       function coreTree(head) {
-         // tree for entities
-         var _rtree = new RBush();
+           if (!_cache[ent]) {
+             _cache[ent] = {};
+           }
 
-         var _bboxes = {}; // maintain a separate tree for granular way segments
+           if (!_cache[ent].parents) {
+             var parents = [];
 
-         var _segmentsRTree = new RBush();
+             if (geometry === 'vertex') {
+               parents = resolver.parentWays(entity);
+             } else {
+               // 'line', 'area', 'relation'
+               parents = resolver.parentRelations(entity);
+             }
 
-         var _segmentsBBoxes = {};
-         var _segmentsByWayId = {};
-         var tree = {};
+             _cache[ent].parents = parents;
+           }
 
-         function entityBBox(entity) {
-           var bbox = entity.extent(head).bbox();
-           bbox.id = entity.id;
-           _bboxes[entity.id] = bbox;
-           return bbox;
-         }
+           return _cache[ent].parents;
+         };
 
-         function segmentBBox(segment) {
-           var extent = segment.extent(head); // extent can be null if the node entities aren't in the graph for some reason
+         features.isHiddenPreset = function (preset, geometry) {
+           if (!_hidden.length) return false;
+           if (!preset.tags) return false;
+           var test = preset.setTags({}, geometry);
 
-           if (!extent) return null;
-           var bbox = extent.bbox();
-           bbox.segment = segment;
-           _segmentsBBoxes[segment.id] = bbox;
-           return bbox;
-         }
+           for (var key in _rules) {
+             if (_rules[key].filter(test, geometry)) {
+               if (_hidden.indexOf(key) !== -1) {
+                 return key;
+               }
 
-         function removeEntity(entity) {
-           _rtree.remove(_bboxes[entity.id]);
+               return false;
+             }
+           }
 
-           delete _bboxes[entity.id];
+           return false;
+         };
 
-           if (_segmentsByWayId[entity.id]) {
-             _segmentsByWayId[entity.id].forEach(function (segment) {
-               _segmentsRTree.remove(_segmentsBBoxes[segment.id]);
+         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);
+           });
+         };
 
-               delete _segmentsBBoxes[segment.id];
-             });
+         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;
 
-             delete _segmentsByWayId[entity.id];
+           for (var i = 0; i < parents.length; i++) {
+             if (!features.isHidden(parents[i], resolver, parents[i].geometry(resolver))) {
+               return false;
+             }
            }
-         }
 
-         function loadEntities(entities) {
-           _rtree.load(entities.map(entityBBox));
+           return true;
+         };
 
-           var segments = [];
-           entities.forEach(function (entity) {
-             if (entity.segments) {
-               var entitySegments = entity.segments(head); // cache these to make them easy to remove later
+         features.hasHiddenConnections = function (entity, resolver) {
+           if (!_hidden.length) return false;
+           var childNodes, connections;
 
-               _segmentsByWayId[entity.id] = entitySegments;
-               segments = segments.concat(entitySegments);
-             }
+           if (entity.type === 'midpoint') {
+             childNodes = [resolver.entity(entity.edge[0]), resolver.entity(entity.edge[1])];
+             connections = [];
+           } else {
+             childNodes = entity.nodes ? resolver.childNodes(entity) : [];
+             connections = features.getParents(entity, resolver, entity.geometry(resolver));
+           } // gather ways connected to child nodes..
+
+
+           connections = childNodes.reduce(function (result, e) {
+             return resolver.isShared(e) ? utilArrayUnion(result, resolver.parentWays(e)) : result;
+           }, connections);
+           return connections.some(function (e) {
+             return features.isHidden(e, resolver, e.geometry(resolver));
            });
-           if (segments.length) _segmentsRTree.load(segments.map(segmentBBox).filter(Boolean));
-         }
+         };
 
-         function updateParents(entity, insertions, memo) {
-           head.parentWays(entity).forEach(function (way) {
-             if (_bboxes[way.id]) {
-               removeEntity(way);
-               insertions[way.id] = way;
-             }
+         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);
+         };
 
-             updateParents(way, insertions, memo);
-           });
-           head.parentRelations(entity).forEach(function (relation) {
-             if (memo[entity.id]) return;
-             memo[entity.id] = true;
+         features.filter = function (d, resolver) {
+           if (!_hidden.length) return d;
+           var result = [];
 
-             if (_bboxes[relation.id]) {
-               removeEntity(relation);
-               insertions[relation.id] = relation;
+           for (var i = 0; i < d.length; i++) {
+             var entity = d[i];
+
+             if (!features.isHidden(entity, resolver, entity.geometry(resolver))) {
+               result.push(entity);
              }
+           }
 
-             updateParents(relation, insertions, memo);
-           });
-         }
+           return result;
+         };
 
-         tree.rebase = function (entities, force) {
-           var insertions = {};
+         features.forceVisible = function (entityIDs) {
+           if (!arguments.length) return Object.keys(_forceVisible);
+           _forceVisible = {};
 
-           for (var i = 0; i < entities.length; i++) {
-             var entity = entities[i];
-             if (!entity.visible) continue;
+           for (var i = 0; i < entityIDs.length; i++) {
+             _forceVisible[entityIDs[i]] = true;
+             var entity = context.hasEntity(entityIDs[i]);
 
-             if (head.entities.hasOwnProperty(entity.id) || _bboxes[entity.id]) {
-               if (!force) {
-                 continue;
-               } else if (_bboxes[entity.id]) {
-                 removeEntity(entity);
+             if (entity && entity.type === 'relation') {
+               // also show relation members (one level deep)
+               for (var j in entity.members) {
+                 _forceVisible[entity.members[j].id] = true;
                }
              }
-
-             insertions[entity.id] = entity;
-             updateParents(entity, insertions, {});
            }
 
-           loadEntities(Object.values(insertions));
-           return tree;
+           return features;
          };
 
-         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 = {};
+         features.init = function () {
+           var storage = corePreferences('disabled-features');
 
-           if (changed.deletion) {
-             diff.deleted().forEach(function (entity) {
-               removeEntity(entity);
-             });
+           if (storage) {
+             var storageDisabled = storage.replace(/;/g, ',').split(',');
+             storageDisabled.forEach(features.disable);
            }
 
-           if (changed.geometry) {
-             diff.modified().forEach(function (entity) {
-               removeEntity(entity);
-               insertions[entity.id] = entity;
-               updateParents(entity, insertions, {});
-             });
-           }
+           var hash = utilStringQs(window.location.hash);
 
-           if (changed.addition) {
-             diff.created().forEach(function (entity) {
-               insertions[entity.id] = entity;
-             });
+           if (hash.disable_features) {
+             var hashDisabled = hash.disable_features.replace(/;/g, ',').split(',');
+             hashDisabled.forEach(features.disable);
            }
-
-           loadEntities(Object.values(insertions));
-         } // returns an array of entities with bounding boxes overlapping `extent` for the given `graph`
+         }; // warm up the feature matching cache upon merging fetched data
 
 
-         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`
+         context.history().on('merge.features', function (newEntities) {
+           if (!newEntities) return;
+           var handle = window.requestIdleCallback(function () {
+             var graph = context.graph();
+             var types = utilArrayGroupBy(newEntities, 'type'); // ensure that getMatches is called on relations before ways
 
+             var entities = [].concat(types.relation || [], types.way || [], types.node || []);
 
-         tree.waySegments = function (extent, graph) {
-           updateToGraph(graph);
-           return _segmentsRTree.search(extent.bbox()).map(function (bbox) {
-             return bbox.segment;
+             for (var i = 0; i < entities.length; i++) {
+               var geometry = entities[i].geometry(graph);
+               features.getMatches(entities[i], graph, geometry);
+             }
            });
-         };
 
-         return tree;
+           _deferred.add(handle);
+         });
+         return features;
        }
 
-       function uiModal(selection, blocking) {
-         var _this = this;
+       /** Error message constants. */
 
-         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);
+       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);
+        */
 
-         shaded.close = function () {
-           shaded.transition().duration(200).style('opacity', 0).remove();
-           modal.transition().duration(200).style('top', '0px');
-           select(document).call(keybinding.unbind);
-         };
+       function throttle(func, wait, options) {
+         var leading = true,
+             trailing = true;
 
-         var modal = shaded.append('div').attr('class', 'modal fillL');
-         modal.append('input').attr('class', 'keytrap keytrap-first').on('focus.keytrap', moveFocusToLast);
+         if (typeof func != 'function') {
+           throw new TypeError(FUNC_ERROR_TEXT);
+         }
 
-         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 (isObject$2(options)) {
+           leading = 'leading' in options ? !!options.leading : leading;
+           trailing = 'trailing' in options ? !!options.trailing : trailing;
          }
 
-         modal.append('div').attr('class', 'content');
-         modal.append('input').attr('class', 'keytrap keytrap-last').on('focus.keytrap', moveFocusToFirst);
+         return debounce(func, wait, {
+           'leading': leading,
+           'maxWait': wait,
+           'trailing': trailing
+         });
+       }
 
-         if (animate) {
-           shaded.transition().style('opacity', 1);
-         } else {
-           shaded.style('opacity', 1);
-         }
+       //
+       // - 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 shaded;
+       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;
 
-         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();
+         for (i = 0; i < parents.length; i++) {
+           nodes = parents[i].nodes;
+           isClosed = parents[i].isClosed();
 
-           if (node) {
-             node.focus();
-           } else {
-             select(this).node().blur();
-           }
-         }
+           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 moveFocusToLast() {
-           var nodes = modal.selectAll('a, button, input:not(.keytrap), select, textarea').nodes();
+               if (isClosed) {
+                 // wraparound if needed
+                 max = nodes.length - 1;
+                 if (ix1 < 0) ix1 = max + ix1;
+                 if (ix2 < 0) ix2 = max + ix2;
+                 if (ix3 > max) ix3 = ix3 - max;
+                 if (ix4 > max) ix4 = ix4 - max;
+               }
 
-           if (nodes.length) {
-             nodes[nodes.length - 1].focus();
-           } else {
-             select(this).node().blur();
+               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
+             }
            }
          }
-       }
 
-       function uiLoading(context) {
-         var _modalSelection = select(null);
+         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 _message = '';
-         var _blocking = false;
+           if (shouldReverse(entity)) {
+             coordinates.reverse();
+           }
 
-         var loading = function loading(selection) {
-           _modalSelection = uiModal(selection, _blocking);
+           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 loadertext = _modalSelection.select('.content').classed('loading-modal', true).append('div').attr('class', 'modal-section fillL');
+               if (a) {
+                 var span = geoVecLength(a, b) - offset;
 
-           loadertext.append('img').attr('class', 'loader').attr('src', context.imagePath('loader-white.gif'));
-           loadertext.append('h3').html(_message);
+                 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
 
-           _modalSelection.select('button.close').attr('class', 'hide');
+                   var coord = [a, p];
 
-           return loading;
-         };
+                   for (span -= dt; span >= 0; span -= dt) {
+                     p = geoVecAdd(p, [dx, dy]);
+                     coord.push(p);
+                   }
 
-         loading.message = function (val) {
-           if (!arguments.length) return _message;
-           _message = val;
-           return loading;
-         };
+                   coord.push(b); // generate svg paths
 
-         loading.blocking = function (val) {
-           if (!arguments.length) return _blocking;
-           _blocking = val;
-           return loading;
-         };
+                   var segment = '';
+                   var j;
 
-         loading.close = function () {
-           _modalSelection.remove();
-         };
+                   for (j = 0; j < coord.length; j++) {
+                     segment += (j === 0 ? 'M' : 'L') + coord[j][0] + ',' + coord[j][1];
+                   }
 
-         loading.isShown = function () {
-           return _modalSelection && !_modalSelection.empty() && _modalSelection.node().parentNode;
-         };
+                   segments.push({
+                     id: entity.id,
+                     index: i++,
+                     d: segment
+                   });
 
-         return loading;
-       }
+                   if (bothDirections(entity)) {
+                     segment = '';
 
-       function coreHistory(context) {
-         var dispatch$1 = dispatch('reset', 'change', 'merge', 'restore', 'undone', 'redone');
+                     for (j = coord.length - 1; j >= 0; j--) {
+                       segment += (j === coord.length - 1 ? 'M' : 'L') + coord[j][0] + ',' + coord[j][1];
+                     }
 
-         var _lock = utilSessionMutex('lock'); // restorable if iD not open in another window/tab and a saved history exists in localStorage
+                     segments.push({
+                       id: entity.id,
+                       index: i++,
+                       d: segment
+                     });
+                   }
+                 }
 
+                 offset = -span;
+               }
 
-         var _hasUnresolvedRestorableChanges = _lock.lock() && !!corePreferences(getKey('saved_history'));
+               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));
+           }
+         });
 
-         var duration = 150;
-         var _imageryUsed = [];
-         var _photoOverlaysUsed = [];
-         var _checkpoints = {};
+         var svgpath = function svgpath(entity) {
+           if (entity.id in cache) {
+             return cache[entity.id];
+           } else {
+             return cache[entity.id] = path(entity.asGeoJSON(graph));
+           }
+         };
 
-         var _pausedGraph;
+         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);
+           }
+         };
 
-         var _stack;
+         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 _index;
+         svgpoint.geojson = function (d) {
+           return svgpoint(d.properties.entity);
+         };
 
-         var _tree; // internal _act, accepts list of actions and eased time
+         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;
 
+             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();
+         }
 
-         function _act(actions, t) {
-           actions = Array.prototype.slice.call(actions);
-           var annotation;
+         function getWaySegments() {
+           var isActiveWay = way.nodes.indexOf(activeID) !== -1;
+           var features = {
+             passive: [],
+             active: []
+           };
+           var start = {};
+           var end = {};
+           var node, type;
 
-           if (typeof actions[actions.length - 1] !== 'function') {
-             annotation = actions.pop();
-           }
+           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
+             };
 
-           var graph = _stack[_index].graph;
+             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);
+               }
+             }
 
-           for (var i = 0; i < actions.length; i++) {
-             graph = actions[i](graph, t);
+             start = end;
            }
 
-           return {
-             graph: graph,
-             annotation: annotation,
-             imageryUsed: _imageryUsed,
-             photoOverlaysUsed: _photoOverlaysUsed,
-             transform: context.projection.transform(),
-             selectedIDs: context.selectedIDs()
-           };
-         } // internal _perform with eased time
-
+           return features;
 
-         function _perform(args, t) {
-           var previous = _stack[_index].graph;
-           _stack = _stack.slice(0, _index + 1);
+           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]
+               }
+             });
+           }
 
-           var actionResult = _act(args, t);
+           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]
+               }
+             });
+           }
+         }
+       }
 
-           _stack.push(actionResult);
+       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'];
 
-           _index++;
-           return change(previous);
-         } // internal _replace with eased time
+         var _tags = function _tags(entity) {
+           return entity.tags;
+         };
 
+         var tagClasses = function tagClasses(selection) {
+           selection.each(function tagClassesEach(entity) {
+             var value = this.className;
 
-         function _replace(args, t) {
-           var previous = _stack[_index].graph; // assert(_index == _stack.length - 1)
+             if (value.baseVal !== undefined) {
+               value = value.baseVal;
+             }
 
-           var actionResult = _act(args, t);
+             var t = _tags(entity);
 
-           _stack[_index] = actionResult;
-           return change(previous);
-         } // internal _overwrite with eased time
+             var computed = tagClasses.getClassesString(t, value);
 
+             if (computed !== value) {
+               select(this).attr('class', computed);
+             }
+           });
+         };
 
-         function _overwrite(args, t) {
-           var previous = _stack[_index].graph;
+         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
 
-           if (_index > 0) {
-             _index--;
+           var overrideGeometry;
 
-             _stack.pop();
-           }
+           if (/\bstroke\b/.test(value)) {
+             if (!!t.barrier && t.barrier !== 'no') {
+               overrideGeometry = 'line';
+             }
+           } // preserve base classes (nothing with `tag-`)
 
-           _stack = _stack.slice(0, _index + 1);
 
-           var actionResult = _act(args, t);
+           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..
 
-           _stack.push(actionResult);
+           for (i = 0; i < primaries.length; i++) {
+             k = primaries[i];
+             v = t[k];
+             if (!v || v === 'no') continue;
 
-           _index++;
-           return change(previous);
-         } // determine difference and dispatch a change event
+             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';
+             }
 
+             primary = k;
 
-         function change(previous) {
-           var difference = coreDifference(previous, history.graph());
+             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 (!_pausedGraph) {
-             dispatch$1.call('change', this, difference);
+             break;
            }
 
-           return difference;
-         } // iD uses namespaced keys so multiple installations do not conflict
-
-
-         function getKey(n) {
-           return 'iD_' + window.location.origin + '_' + n;
-         }
+           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`
 
-         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;
-             });
+                 v = t[k];
+                 if (!v || v === 'no') continue;
+                 status = statuses[i];
+                 break;
+               }
+             }
+           } // add at most one status tag, only if relates to primary tag..
 
-             _stack[0].graph.rebase(entities, stack, false);
 
-             _tree.rebase(entities, false);
+           if (!status) {
+             for (i = 0; i < statuses.length; i++) {
+               k = statuses[i];
+               v = t[k];
+               if (!v || v === 'no') continue;
 
-             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];
+               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 (arguments.length === 1 || arguments.length === 2 && typeof arguments[1] !== 'function') {
-               transitionable = !!action0.transitionable;
-             }
 
-             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);
+               if (status) break;
              }
-           },
-           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;
+           }
 
-             if (isNaN(+n) || +n < 0) {
-               n = 1;
-             }
+           if (status) {
+             classes.push('tag-status');
+             classes.push('tag-status-' + status);
+           } // add any secondary tags
 
-             while (n-- > 0 && _index > 0) {
-               _index--;
 
-               _stack.pop();
-             }
+           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 change(previous);
-           },
-           // Back to the previous annotated state or _index = 0.
-           undo: function undo() {
-             select(document).interrupt('history.perform');
-             var previousStack = _stack[_index];
-             var previous = previousStack.graph;
 
-             while (_index > 0) {
-               _index--;
-               if (_stack[_index].annotation) break;
-             }
+           if (primary === 'highway' && !osmPathHighwayTagValues[t.highway] || primary === 'aeroway') {
+             var surface = t.highway === 'track' ? 'unpaved' : 'paved';
 
-             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 (k in t) {
+               v = t[k];
 
-             while (tryIndex < _stack.length - 1) {
-               tryIndex++;
+               if (k in osmPavedTags) {
+                 surface = osmPavedTags[k][v] ? 'paved' : 'unpaved';
+               }
 
-               if (_stack[tryIndex].annotation) {
-                 _index = tryIndex;
-                 dispatch$1.call('redone', this, _stack[_index], previousStack);
-                 break;
+               if (k in osmSemipavedTags && !!osmSemipavedTags[k][v]) {
+                 surface = 'semipaved';
                }
              }
 
-             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;
+             classes.push('tag-' + surface);
+           } // If this is a wikidata-tagged item, add a class for that..
 
-             while (i >= 0) {
-               if (_stack[i].annotation) return _stack[i].annotation;
-               i--;
-             }
-           },
-           redoAnnotation: function redoAnnotation() {
-             var i = _index + 1;
 
-             while (i <= _stack.length - 1) {
-               if (_stack[i].annotation) return _stack[i].annotation;
-               i++;
-             }
-           },
-           // Returns the entities from the active graph with bounding boxes
-           // overlapping the given `extent`.
-           intersects: function intersects(extent) {
-             return _tree.intersects(extent, _stack[_index].graph);
-           },
-           difference: function difference() {
-             var base = _stack[0].graph;
-             var head = _stack[_index].graph;
-             return coreDifference(base, head);
-           },
-           changes: function changes(action) {
-             var base = _stack[0].graph;
-             var head = _stack[_index].graph;
+           var qid = t.wikidata || t['flag:wikidata'] || t['brand:wikidata'] || t['network:wikidata'] || t['operator:wikidata'];
 
-             if (action) {
-               head = action(head);
-             }
+           if (qid) {
+             classes.push('tag-wikidata');
+           }
 
-             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();
+           return classes.join(' ').trim();
+         };
 
-               _stack.slice(1, _index + 1).forEach(function (state) {
-                 state.imageryUsed.forEach(function (source) {
-                   if (source !== 'Custom') {
-                     s.add(source);
-                   }
-                 });
-               });
+         tagClasses.tags = function (val) {
+           if (!arguments.length) return _tags;
+           _tags = val;
+           return tagClasses;
+         };
 
-               return Array.from(s);
-             }
-           },
-           photoOverlaysUsed: function photoOverlaysUsed(sources) {
-             if (sources) {
-               _photoOverlaysUsed = sources;
-               return history;
-             } else {
-               var s = new Set();
+         return tagClasses;
+       }
 
-               _stack.slice(1, _index + 1).forEach(function (state) {
-                 if (state.photoOverlaysUsed && Array.isArray(state.photoOverlaysUsed)) {
-                   state.photoOverlaysUsed.forEach(function (photoOverlay) {
-                     s.add(photoOverlay);
-                   });
-                 }
-               });
+       // 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;
+         }
 
-               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 = {};
-             }
+         for (var tag in patterns) {
+           var entityValue = tags[tag];
+           if (!entityValue) continue;
+
+           if (typeof patterns[tag] === 'string') {
+             // extra short syntax (just tag) - pattern name
+             return 'pattern-' + patterns[tag];
+           } else {
+             var values = patterns[tag];
+
+             for (var value in values) {
+               if (entityValue !== value) continue;
+               var rules = values[value];
 
-             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 (typeof rules === 'string') {
+                 // short syntax - pattern name
+                 return 'pattern-' + rules;
+               } // long syntax - rule array
 
-             Object.values(graph.base().entities).forEach(function (entity) {
-               var copy = copyIntroEntity(entity);
-               baseEntities[copy.id] = copy;
-             }); // replace base entities with head entities..
 
-             Object.keys(graph.entities).forEach(function (id) {
-               var entity = graph.entities[id];
+               for (var ruleKey in rules) {
+                 var rule = rules[ruleKey];
+                 var pass = true;
 
-               if (entity) {
-                 var copy = copyIntroEntity(entity);
-                 baseEntities[copy.id] = copy;
-               } else {
-                 delete baseEntities[id];
-               }
-             }); // swap temporary for permanent ids..
+                 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];
 
-             Object.values(baseEntities).forEach(function (entity) {
-               if (Array.isArray(entity.nodes)) {
-                 entity.nodes = entity.nodes.map(function (node) {
-                   return permIDs[node] || node;
-                 });
-               }
+                     if (!v || v !== rule[criterion]) {
+                       pass = false;
+                       break;
+                     }
+                   }
+                 }
 
-               if (Array.isArray(entity.members)) {
-                 entity.members = entity.members.map(function (member) {
-                   member.id = permIDs[member.id] || member.id;
-                   return member;
-                 });
+                 if (pass) {
+                   return 'pattern-' + rule.pattern;
+                 }
                }
-             });
-             return JSON.stringify({
-               dataIntroGraph: baseEntities
-             });
+             }
+           }
+         }
 
-             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`
+         return null;
+       }
 
-               if (copy.tags && !Object.keys(copy.tags)) {
-                 delete copy.tags;
-               }
+       function svgAreas(projection, context) {
+         function getPatternStyle(tags) {
+           var imageID = svgTagPattern(tags);
 
-               if (Array.isArray(copy.loc)) {
-                 copy.loc[0] = +copy.loc[0].toFixed(6);
-                 copy.loc[1] = +copy.loc[1].toFixed(6);
-               }
+           if (imageID) {
+             return 'url("#ideditor-' + imageID + '")';
+           }
 
-               var match = source.id.match(/([nrw])-\d*/); // temporary id
+           return '';
+         }
 
-               if (match !== null) {
-                 var nrw = match[1];
-                 var permID;
+         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
 
-                 do {
-                   permID = nrw + ++nextID[nrw];
-                 } while (baseEntities.hasOwnProperty(permID));
+           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
 
-                 copy.id = permIDs[source.id] = permID;
-               }
+           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 copy;
+           targets.exit().remove();
+
+           var segmentWasEdited = function segmentWasEdited(d) {
+             var wayID = d.properties.entity.id; // if the whole line was edited, don't draw segment changes
+
+             if (!base.entities[wayID] || !fastDeepEqual(graph.entities[wayID].nodes, base.entities[wayID].nodes)) {
+               return false;
              }
-           },
-           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];
+             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 (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.
 
+           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 (id in base.graph.entities) {
-                   baseEntities[id] = base.graph.entities[id];
-                 }
+           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
 
-                 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
+           nopes.exit().remove(); // enter/update
 
+           nopes.enter().append('path').merge(nopes).attr('d', getPath).attr('class', function (d) {
+             return 'way area target target-nope ' + nopeClass + d.id;
+           }).classed('segment-edited', segmentWasEdited);
+         }
 
-                 var baseParents = base.graph._parentWays[id];
+         function drawAreas(selection, graph, entities, filter) {
+           var path = svgPath(projection, graph, true);
+           var areas = {};
+           var multipolygon;
+           var base = context.history().base();
 
-                 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;
-             });
+           for (var i = 0; i < entities.length; i++) {
+             var entity = entities[i];
+             if (entity.geometry(graph) !== 'area') continue;
+             multipolygon = osmIsOldMultipolygonOuterMember(entity, graph);
 
-             return JSON.stringify({
-               version: 3,
-               entities: Object.values(allEntities),
-               baseEntities: Object.values(baseEntities),
-               stack: s,
-               nextIDs: osmEntity.id.next,
-               index: _index,
-               // note the time the changes were saved
-               timestamp: new Date().getTime()
-             });
-           },
-           fromJSON: function fromJSON(json, loadChildNodes) {
-             var h = JSON.parse(json);
-             var loadComplete = true;
-             osmEntity.id.next = h.nextIDs;
-             _index = h.index;
+             if (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 (h.version === 2 || h.version === 3) {
-               var allEntities = {};
-               h.entities.forEach(function (entity) {
-                 allEntities[osmEntity.key(entity)] = osmEntity(entity);
-               });
+           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 (h.version === 3) {
-                 // This merges originals for changed entities into the base of
-                 // the _stack even if the current _stack doesn't have them (for
-                 // example when iD has been restarted in a different region)
-                 var baseEntities = h.baseEntities.map(function (d) {
-                   return osmEntity(d);
-                 });
+           var 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;
 
-                 var stack = _stack.map(function (state) {
-                   return state.graph;
-                 });
+           function sortedByArea(entity) {
+             if (this._parent.__data__ === 'fill') {
+               return fillpaths[bisect(fillpaths, -entity.area(graph))];
+             }
+           }
 
-                 _stack[0].graph.rebase(baseEntities, stack, true);
+           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);
 
-                 _tree.rebase(baseEntities, true); // When we restore a modified way, we also need to fetch any missing
-                 // childnodes that would normally have been downloaded with it.. #2142
+             if (layer === 'fill') {
+               this.setAttribute('clip-path', 'url(#ideditor-' + entity.id + '-clippath)');
+               this.style.fill = this.style.stroke = getPatternStyle(entity.tags);
+             }
+           }).classed('added', function (d) {
+             return !base.entities[d.id];
+           }).classed('geometry-edited', function (d) {
+             return graph.entities[d.id] && base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].nodes, base.entities[d.id].nodes);
+           }).classed('retagged', function (d) {
+             return graph.entities[d.id] && base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].tags, base.entities[d.id].tags);
+           }).call(svgTagClasses()).attr('d', path); // Draw touch targets..
 
+           touchLayer.call(drawTargets, graph, data.stroke, filter);
+         }
 
-                 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);
-                   });
+         return drawAreas;
+       }
 
-                   if (missing.length && osm) {
-                     loadComplete = false;
-                     context.map().redrawEnable(false);
-                     var loading = uiLoading(context).blocking(true);
-                     context.container().call(loading);
+       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 childNodesLoaded = function childNodesLoaded(err, result) {
-                       if (!err) {
-                         var visibleGroups = utilArrayGroupBy(result.data, 'visible');
-                         var visibles = visibleGroups["true"] || []; // alive nodes
+         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 invisibles = visibleGroups["false"] || []; // deleted nodes
+         var seen = [];
+         return function stringify(node) {
+           if (node && node.toJSON && typeof node.toJSON === 'function') {
+             node = node.toJSON();
+           }
 
-                         if (visibles.length) {
-                           var visibleIDs = visibles.map(function (entity) {
-                             return entity.id;
-                           });
+           if (node === undefined) return;
+           if (typeof node == 'number') return isFinite(node) ? '' + node : 'null';
+           if (_typeof(node) !== 'object') return JSON.stringify(node);
+           var i, out;
 
-                           var stack = _stack.map(function (state) {
-                             return state.graph;
-                           });
+           if (Array.isArray(node)) {
+             out = '[';
 
-                           missing = utilArrayDifference(missing, visibleIDs);
+             for (i = 0; i < node.length; i++) {
+               if (i) out += ',';
+               out += stringify(node[i]) || 'null';
+             }
 
-                           _stack[0].graph.rebase(visibles, stack, true);
+             return out + ']';
+           }
 
-                           _tree.rebase(visibles, true);
-                         } // fetch older versions of nodes that were deleted..
+           if (node === null) return 'null';
 
+           if (seen.indexOf(node) !== -1) {
+             if (cycles) return JSON.stringify('__cycle__');
+             throw new TypeError('Converting circular structure to JSON');
+           }
 
-                         invisibles.forEach(function (entity) {
-                           osm.loadEntityVersion(entity.id, +entity.version - 1, childNodesLoaded);
-                         });
-                       }
+           var seenIndex = seen.push(node) - 1;
+           var keys = Object.keys(node).sort(cmp && cmp(node));
+           out = '';
 
-                       if (err || !missing.length) {
-                         loading.close();
-                         context.map().redrawEnable(true);
-                         dispatch$1.call('change');
-                         dispatch$1.call('restore', this);
-                       }
-                     };
+           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;
+           }
 
-                     osm.loadMultiple(missing, childNodesLoaded);
-                   }
-                 }
-               }
+           seen.splice(seenIndex, 1);
+           return '{' + out + '}';
+         }(data);
+       };
 
-               _stack = h.stack.map(function (d) {
-                 var entities = {},
-                     entity;
+       var $entries = objectToArray.entries;
 
-                 if (d.modified) {
-                   d.modified.forEach(function (key) {
-                     entity = allEntities[key];
-                     entities[entity.id] = entity;
-                   });
-                 }
+       // `Object.entries` method
+       // https://tc39.es/ecma262/#sec-object.entries
+       _export({ target: 'Object', stat: true }, {
+         entries: function entries(O) {
+           return $entries(O);
+         }
+       });
 
-                 if (d.deleted) {
-                   d.deleted.forEach(function (id) {
-                     entities[id] = undefined;
-                   });
-                 }
+       var _marked = /*#__PURE__*/regeneratorRuntime.mark(gpxGen),
+           _marked3 = /*#__PURE__*/regeneratorRuntime.mark(kmlGen);
 
-                 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 = {};
+       // cast array x into numbers
+       // get the content of a text node, if any
+       function nodeVal(x) {
+         if (x && x.normalize) {
+           x.normalize();
+         }
 
-                 for (var i in d.entities) {
-                   var entity = d.entities[i];
-                   entities[i] = entity === 'undefined' ? undefined : osmEntity(entity);
-                 }
+         return x && x.textContent || "";
+       } // one Y child of X, if any, otherwise null
 
-                 d.graph = coreGraph(_stack[0].graph).load(entities);
-                 return d;
-               });
-             }
 
-             var transform = _stack[_index].transform;
+       function get1(x, y) {
+         var n = x.getElementsByTagName(y);
+         return n.length ? n[0] : null;
+       }
 
-             if (transform) {
-               context.map().transformEase(transform, 0); // 0 = immediate, no easing
-             }
+       function getLineStyle(extensions) {
+         var style = {};
 
-             if (loadComplete) {
-               dispatch$1.call('change');
-               dispatch$1.call('restore', this);
-             }
+         if (extensions) {
+           var lineStyle = get1(extensions, "line");
 
-             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);
-             }
+           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
 
-             return history;
-           },
-           // delete the history version saved in localStorage
-           clearSaved: function clearSaved() {
-             context.debouncedSave.cancel();
+             if (!isNaN(width)) style["stroke-width"] = width * 96 / 25.4;
+           }
+         }
 
-             if (_lock.locked()) {
-               _hasUnresolvedRestorableChanges = false;
-               corePreferences(getKey('saved_history'), null); // clear the changeset metadata associated with the saved history
+         return style;
+       } // get the contents of multiple text nodes, if present
 
-               corePreferences('comment', null);
-               corePreferences('hashtags', null);
-               corePreferences('source', null);
-             }
 
-             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 getMulti(x, ys) {
+         var o = {};
+         var n;
+         var k;
+
+         for (k = 0; k < ys.length; k++) {
+           n = get1(x, ys[k]);
+           if (n) o[ys[k]] = nodeVal(n);
+         }
 
-       /**
-        * Look for roads that can be connected to other roads with a short extension
-        */
+         return o;
+       }
 
-       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 getProperties$1(node) {
+         var prop = getMulti(node, ["name", "cmt", "desc", "type", "time", "keywords"]); // Parse additional data from our Garmin extension(s)
 
-         var CLOSE_NODE_TH = EXTEND_TH_METERS - WELD_TH_METERS; // Comes from considering bounding case of perpendicular ways
+         var extensions = node.getElementsByTagNameNS("http://www.garmin.com/xmlschemas/GpxExtensions/v3", "*");
 
-         var SIG_ANGLE_TH = Math.atan(WELD_TH_METERS / EXTEND_TH_METERS);
+         for (var i = 0; i < extensions.length; i++) {
+           var extension = extensions[i]; // Ignore nested extensions, like those on routepoints or trackpoints
 
-         function isHighway(entity) {
-           return entity.type === 'way' && osmRoutableHighwayTagValues[entity.tags.highway];
+           if (extension.parentNode.parentNode === node) {
+             prop[extension.tagName.replace(":", "_")] = nodeVal(extension);
+           }
          }
 
-         function isTaggedAsNotContinuing(node) {
-           return node.tags.noexit === 'yes' || node.tags.amenity === 'parking_entrance' || node.tags.entrance && node.tags.entrance !== 'no';
-         }
+         var links = node.getElementsByTagName("link");
+         if (links.length) prop.links = [];
 
-         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]);
+         for (var _i = 0; _i < links.length; _i++) {
+           prop.links.push(Object.assign({
+             href: links[_i].getAttribute("href")
+           }, getMulti(links[_i], ["text", "type"])));
+         }
 
-                 if (this.entityIds[0] === this.entityIds[2]) {
-                   return entity1 ? _t.html('issues.almost_junction.self.message', {
-                     feature: utilDisplayLabel(entity1, context.graph())
-                   }) : '';
-                 } else {
-                   var entity2 = context.hasEntity(this.entityIds[2]);
-                   return entity1 && entity2 ? _t.html('issues.almost_junction.message', {
-                     feature: utilDisplayLabel(entity1, context.graph()),
-                     feature2: utilDisplayLabel(entity2, context.graph())
-                   }) : '';
-                 }
-               },
-               reference: showReference,
-               entityIds: [entity.id, extendableNodeInfo.node.id, extendableNodeInfo.wid],
-               loc: extendableNodeInfo.node.loc,
-               hash: JSON.stringify(extendableNodeInfo.node.loc),
-               data: {
-                 midId: extendableNodeInfo.mid.id,
-                 edge: extendableNodeInfo.edge,
-                 cross_loc: extendableNodeInfo.cross_loc
-               },
-               dynamicFixes: makeFixes
-             }));
-           });
-           return issues;
+         return prop;
+       }
 
-           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 coordPair$1(x) {
+         var ll = [parseFloat(x.getAttribute("lon")), parseFloat(x.getAttribute("lat"))];
+         var ele = get1(x, "ele"); // handle namespaced attribute in browser
 
-                 var _this$issue$entityIds = _slicedToArray(this.issue.entityIds, 3),
-                     endNodeId = _this$issue$entityIds[1],
-                     crossWayId = _this$issue$entityIds[2];
+         var heart = get1(x, "gpxtpx:hr") || get1(x, "hr");
+         var time = get1(x, "time");
+         var e;
 
-                 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 (ele) {
+           e = parseFloat(nodeVal(ele));
 
-                 var nearEndNodes = findNearbyEndNodes(endNode, crossWay);
+           if (!isNaN(e)) {
+             ll.push(e);
+           }
+         }
 
-                 if (nearEndNodes.length > 0) {
-                   var collinear = findSmallJoinAngle(midNode, endNode, nearEndNodes);
+         var result = {
+           coordinates: ll,
+           time: time ? nodeVal(time) : null,
+           extendedValues: []
+         };
 
-                   if (collinear) {
-                     context.perform(actionMergeNodes([collinear.id, endNode.id], collinear.loc), annotation);
-                     return;
-                   }
-                 }
+         if (heart) {
+           result.extendedValues.push(["heart", parseFloat(nodeVal(heart))]);
+         }
 
-                 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
+         var extensions = get1(x, "extensions");
 
-                 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]);
+         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.hasInterestingTags()) {
-               // node has no descriptive tags, suggest noexit fix
-               fixes.push(new validationIssueFix({
-                 icon: 'maki-barrier',
-                 title: _t.html('issues.fix.tag_as_disconnected.title'),
-                 onClick: function onClick(context) {
-                   var nodeID = this.issue.entityIds[1];
-                   var tags = Object.assign({}, context.entity(nodeID).tags);
-                   tags.noexit = 'yes';
-                   context.perform(actionChangeTags(nodeID, tags), _t('issues.fix.tag_as_disconnected.annotation'));
-                 }
-               }));
+             if (!isNaN(v)) {
+               result.extendedValues.push([name, v]);
              }
-
-             return fixes;
            }
+         }
 
-           function showReference(selection) {
-             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.almost_junction.highway-highway.reference'));
+         return result;
+       }
+
+       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 isExtendableCandidate(node, way) {
-             // can not accurately test vertices on tiles not downloaded from osm - #5938
-             var osm = services.osm;
+       function getPoints$1(node, pointname) {
+         var pts = node.getElementsByTagName(pointname);
+         if (pts.length < 2) return; // Invalid line in GeoJSON
 
-             if (osm && !osm.isDataLoaded(node.loc)) {
-               return false;
-             }
+         var line = [];
+         var times = [];
+         var extendedValues = {};
 
-             if (isTaggedAsNotContinuing(node) || graph.parentWays(node).length !== 1) {
-               return false;
-             }
+         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 occurrences = 0;
+           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];
 
-             for (var index in way.nodes) {
-               if (way.nodes[index] === node.id) {
-                 occurrences += 1;
+             var plural = name === "heart" ? name : name + "s";
 
-                 if (occurrences > 1) {
-                   return false;
-                 }
-               }
+             if (!extendedValues[plural]) {
+               extendedValues[plural] = Array(pts.length).fill(null);
              }
 
-             return true;
+             extendedValues[plural][i] = val;
            }
+         }
 
-           function findConnectableEndNodesByExtension(way) {
-             var results = [];
-             if (way.isClosed()) return results;
-             var testNodes;
-             var indices = [0, way.nodes.length - 1];
-             indices.forEach(function (nodeIndex) {
-               var nodeID = way.nodes[nodeIndex];
-               var node = graph.entity(nodeID);
-               if (!isExtendableCandidate(node, way)) return;
-               var connectionInfo = canConnectByExtend(way, nodeIndex);
-               if (!connectionInfo) return;
-               testNodes = graph.childNodes(way).slice(); // shallow copy
+         return {
+           line: line,
+           times: times,
+           extendedValues: extendedValues
+         };
+       }
 
-               testNodes[nodeIndex] = testNodes[nodeIndex].move(connectionInfo.cross_loc); // don't flag issue if connecting the ways would cause self-intersection
+       function getTrack(node) {
+         var segments = node.getElementsByTagName("trkseg");
+         var track = [];
+         var times = [];
+         var extractedLines = [];
 
-               if (geoHasSelfIntersections(testNodes, nodeID)) return;
-               results.push(connectionInfo);
-             });
-             return results;
+         for (var i = 0; i < segments.length; i++) {
+           var line = getPoints$1(segments[i], "trkpt");
+
+           if (line) {
+             extractedLines.push(line);
+             if (line.times && line.times.length) times.push(line.times);
            }
+         }
 
-           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 (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]
            }
+         } : {});
 
-           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
+         for (var _i3 = 0; _i3 < extractedLines.length; _i3++) {
+           var _line = extractedLines[_i3];
+           track.push(_line.line);
 
-             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);
+           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];
 
-               if (diff < minAngle) {
-                 joinTo = endNode;
-                 minAngle = diff;
+             var props = properties;
+
+             if (name === "heart") {
+               if (!properties.coordinateProperties) {
+                 properties.coordinateProperties = {};
                }
-             });
-             /* Threshold set by considering right angle triangle
-             based on node joining threshold and extension distance */
 
-             if (minAngle <= SIG_ANGLE_TH) return joinTo;
-             return null;
+               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;
+             }
            }
+         }
 
-           function hasTag(tags, key) {
-             return tags[key] !== undefined && tags[key] !== 'no';
+         return {
+           type: "Feature",
+           properties: properties,
+           geometry: multi ? {
+             type: "MultiLineString",
+             coordinates: track
+           } : {
+             type: "LineString",
+             coordinates: track[0]
            }
+         };
+       }
 
-           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
+       function getPoint(node) {
+         return {
+           type: "Feature",
+           properties: Object.assign(getProperties$1(node), getMulti(node, ["sym"])),
+           geometry: {
+             type: "Point",
+             coordinates: coordPair$1(node).coordinates
+           }
+         };
+       }
 
-             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
+       function gpxGen(doc) {
+         var tracks, routes, waypoints, i, feature, _i5, _feature, _i6;
 
-             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;
-           }
+         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;
 
-           function canConnectByExtend(way, endNodeIdx) {
-             var tipNid = way.nodes[endNodeIdx]; // the 'tip' node for extension point
+               case 4:
+                 if (!(i < tracks.length)) {
+                   _context.next = 12;
+                   break;
+                 }
 
-             var midNid = endNodeIdx === 0 ? way.nodes[1] : way.nodes[way.nodes.length - 2]; // the other node of the edge
+                 feature = getTrack(tracks[i]);
 
-             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
+                 if (!feature) {
+                   _context.next = 9;
+                   break;
+                 }
 
-             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
+                 _context.next = 9;
+                 return feature;
 
-             var segmentInfos = tree.waySegments(queryExtent, graph);
+               case 9:
+                 i++;
+                 _context.next = 4;
+                 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 12:
+                 _i5 = 0;
 
-               if (crossLoc) {
-                 return {
-                   mid: midNode,
-                   node: tipNode,
-                   wid: way2.id,
-                   edge: [nA.id, nB.id],
-                   cross_loc: crossLoc
-                 };
-               }
-             }
+               case 13:
+                 if (!(_i5 < routes.length)) {
+                   _context.next = 21;
+                   break;
+                 }
 
-             return null;
+                 _feature = getRoute(routes[_i5]);
+
+                 if (!_feature) {
+                   _context.next = 18;
+                   break;
+                 }
+
+                 _context.next = 18;
+                 return _feature;
+
+               case 18:
+                 _i5++;
+                 _context.next = 13;
+                 break;
+
+               case 21:
+                 _i6 = 0;
+
+               case 22:
+                 if (!(_i6 < waypoints.length)) {
+                   _context.next = 28;
+                   break;
+                 }
+
+                 _context.next = 25;
+                 return getPoint(waypoints[_i6]);
+
+               case 25:
+                 _i6++;
+                 _context.next = 22;
+                 break;
+
+               case 28:
+               case "end":
+                 return _context.stop();
+             }
            }
+         }, _marked);
+       }
+
+       function gpx(doc) {
+         return {
+           type: "FeatureCollection",
+           features: Array.from(gpxGen(doc))
          };
+       }
 
-         validation.type = type;
-         return validation;
+       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;
+
+         for (var i = 0; i < x.length; i++) {
+           h = (h << 5) - h + x.charCodeAt(i) | 0;
+         }
+
+         return h;
+       } // get one coordinate from a coordinate array, if any
+
+
+       function coord1(v) {
+         return v.replace(removeSpace, "").split(",").map(parseFloat);
+       } // get all coordinates from a coordinate array as [[],[]]
+
+
+       function coord(v) {
+         return v.replace(trimSpace, "").split(splitSpace).map(coord1);
        }
 
-       function validationCloseNodes(context) {
-         var type = 'close_nodes';
-         var pointThresholdMeters = 0.2;
+       function xml2str(node) {
+         if (node.xml !== undefined) return node.xml;
 
-         var validation = function validation(entity, graph) {
-           if (entity.type === 'node') {
-             return getIssuesForNode(entity);
-           } else if (entity.type === 'way') {
-             return getIssuesForWay(entity);
+         if (node.tagName) {
+           var output = node.tagName;
+
+           for (var i = 0; i < node.attributes.length; i++) {
+             output += node.attributes[i].name + node.attributes[i].value;
            }
 
-           return [];
+           for (var _i9 = 0; _i9 < node.childNodes.length; _i9++) {
+             output += xml2str(node.childNodes[_i9]);
+           }
 
-           function getIssuesForNode(node) {
-             var parentWays = graph.parentWays(node);
+           return output;
+         }
 
-             if (parentWays.length) {
-               return getIssuesForVertex(node, parentWays);
-             } else {
-               return getIssuesForDetachedPoint(node);
-             }
-           }
+         if (node.nodeName === "#text") {
+           return (node.nodeValue || node.value || "").trim();
+         }
 
-           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 (node.nodeName === "#cdata-section") {
+           return node.nodeValue;
+         }
 
-             for (var i in parentRelations) {
-               var relation = parentRelations[i];
-               if (relation.tags.type === 'boundary') return 'boundary';
+         return "";
+       }
 
-               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 geotypes = ["Polygon", "LineString", "Point", "Track", "gx:Track"];
 
-             return 'other';
-           }
+       function kmlColor(properties, elem, prefix) {
+         var v = nodeVal(get1(elem, "color")) || "";
+         var colorProp = prefix == "stroke" || prefix === "fill" ? prefix : prefix + "-color";
 
-           function shouldCheckWay(way) {
-             // don't flag issues where merging would create degenerate ways
-             if (way.nodes.length <= 2 || way.isClosed() && way.nodes.length <= 4) return false;
-             var bbox = way.extent(graph).bbox();
-             var hypotenuseMeters = geoSphericalDistance([bbox.minX, bbox.minY], [bbox.maxX, bbox.maxY]); // don't flag close nodes in very small ways
+         if (v.substr(0, 1) === "#") {
+           v = v.substr(1);
+         }
 
-             if (hypotenuseMeters < 1.5) return false;
-             return true;
-           }
+         if (v.length === 6 || v.length === 3) {
+           properties[colorProp] = v;
+         } else if (v.length === 8) {
+           properties[prefix + "-opacity"] = parseInt(v.substr(0, 2), 16) / 255;
+           properties[colorProp] = "#" + v.substr(6, 2) + v.substr(4, 2) + v.substr(2, 2);
+         }
+       }
 
-           function getIssuesForWay(way) {
-             if (!shouldCheckWay(way)) return [];
-             var issues = [],
-                 nodes = graph.childNodes(way);
+       function numericProperty(properties, elem, source, target) {
+         var val = parseFloat(nodeVal(get1(elem, source)));
+         if (!isNaN(val)) properties[target] = val;
+       }
 
-             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);
-             }
+       function gxCoords(root) {
+         var elems = root.getElementsByTagName("coord");
+         var coords = [];
+         var times = [];
+         if (elems.length === 0) elems = root.getElementsByTagName("gx:coord");
 
-             return issues;
-           }
+         for (var i = 0; i < elems.length; i++) {
+           coords.push(nodeVal(elems[i]).split(" ").map(parseFloat));
+         }
 
-           function getIssuesForVertex(node, parentWays) {
-             var issues = [];
+         var timeElems = root.getElementsByTagName("when");
 
-             function checkForCloseness(node1, node2, way) {
-               var issue = getWayIssueIfAny(node1, node2, way);
-               if (issue) issues.push(issue);
-             }
+         for (var j = 0; j < timeElems.length; j++) {
+           times.push(nodeVal(timeElems[j]));
+         }
 
-             for (var i = 0; i < parentWays.length; i++) {
-               var parentWay = parentWays[i];
-               if (!shouldCheckWay(parentWay)) continue;
-               var lastIndex = parentWay.nodes.length - 1;
+         return {
+           coords: coords,
+           times: times
+         };
+       }
 
-               for (var j = 0; j < parentWay.nodes.length; j++) {
-                 if (j !== 0) {
-                   if (parentWay.nodes[j - 1] === node.id) {
-                     checkForCloseness(node, graph.entity(parentWay.nodes[j]), parentWay);
-                   }
-                 }
+       function getGeometry(root) {
+         var geomNode;
+         var geomNodes;
+         var i;
+         var j;
+         var k;
+         var geoms = [];
+         var coordTimes = [];
 
-                 if (j !== lastIndex) {
-                   if (parentWay.nodes[j + 1] === node.id) {
-                     checkForCloseness(graph.entity(parentWay.nodes[j]), node, parentWay);
-                   }
+         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 = root.getElementsByTagName(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 = 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 issues;
+         return {
+           geoms: geoms,
+           coordTimes: coordTimes
+         };
+       }
+
+       function getPlacemark(root, styleIndex, styleMapIndex, styleByHash) {
+         var geomsAndTimes = getGeometry(root);
+         var i;
+         var properties = {};
+         var name = nodeVal(get1(root, "name"));
+         var address = nodeVal(get1(root, "address"));
+         var styleUrl = nodeVal(get1(root, "styleUrl"));
+         var description = nodeVal(get1(root, "description"));
+         var timeSpan = get1(root, "TimeSpan");
+         var timeStamp = get1(root, "TimeStamp");
+         var extendedData = get1(root, "ExtendedData");
+         var iconStyle = get1(root, "IconStyle");
+         var labelStyle = get1(root, "LabelStyle");
+         var lineStyle = get1(root, "LineStyle");
+         var polyStyle = get1(root, "PolyStyle");
+         var visibility = get1(root, "visibility");
+         if (name) properties.name = name;
+         if (address) properties.address = address;
+
+         if (styleUrl) {
+           if (styleUrl[0] !== "#") {
+             styleUrl = "#" + styleUrl;
            }
 
-           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
+           properties.styleUrl = styleUrl;
 
-             if (wayType === 'boundary') return 0; // expect some features to be mapped with higher levels of detail
+           if (styleIndex[styleUrl]) {
+             properties.styleHash = styleIndex[styleUrl];
+           }
 
-             if (wayType === 'indoor') return 0.01;
-             if (wayType === 'building') return 0.05;
-             if (wayType === 'path') return 0.1;
-             return 0.2;
+           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 (!iconStyle) iconStyle = get1(style, "IconStyle");
+             if (!labelStyle) labelStyle = get1(style, "LabelStyle");
+             if (!lineStyle) lineStyle = get1(style, "LineStyle");
+             if (!polyStyle) polyStyle = get1(style, "PolyStyle");
            }
+         }
 
-           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);
+         if (description) properties.description = description;
 
-             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 (timeSpan) {
+           var begin = nodeVal(get1(timeSpan, "begin"));
+           var end = nodeVal(get1(timeSpan, "end"));
+           properties.timespan = {
+             begin: begin,
+             end: end
+           };
+         }
 
-               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;
+         if (timeStamp) {
+           properties.timestamp = nodeVal(get1(timeStamp, "when"));
+         }
 
-                 for (var key in zAxisKeys) {
-                   var nodeValue = node.tags[key] || '0';
-                   var nearbyValue = nearby.tags[key] || '0';
+         if (iconStyle) {
+           kmlColor(properties, iconStyle, "icon");
+           numericProperty(properties, iconStyle, "scale", "icon-scale");
+           numericProperty(properties, iconStyle, "heading", "icon-heading");
+           var hotspot = get1(iconStyle, "hotSpot");
 
-                   if (nodeValue !== nearbyValue) {
-                     zAxisDifferentiates = true;
-                     break;
-                   }
-                 }
+           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 (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')
-                     })];
-                   }
-                 }));
-               }
-             }
+           var icon = get1(iconStyle, "Icon");
+
+           if (icon) {
+             var href = nodeVal(get1(icon, "href"));
+             if (href) properties.icon = href;
+           }
+         }
+
+         if (labelStyle) {
+           kmlColor(properties, labelStyle, "label");
+           numericProperty(properties, labelStyle, "scale", "label-scale");
+         }
+
+         if (lineStyle) {
+           kmlColor(properties, lineStyle, "stroke");
+           numericProperty(properties, lineStyle, "width", "stroke-width");
+         }
+
+         if (polyStyle) {
+           kmlColor(properties, polyStyle, "fill");
+           var fill = nodeVal(get1(polyStyle, "fill"));
+           var outline = nodeVal(get1(polyStyle, "outline"));
+           if (fill) properties["fill-opacity"] = fill === "1" ? properties["fill-opacity"] || 1 : 0;
+           if (outline) properties["stroke-opacity"] = outline === "1" ? properties["stroke-opacity"] || 1 : 0;
+         }
 
-             return issues;
+         if (extendedData) {
+           var datas = extendedData.getElementsByTagName("Data"),
+               simpleDatas = extendedData.getElementsByTagName("SimpleData");
 
-             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);
-             }
+           for (i = 0; i < datas.length; i++) {
+             properties[datas[i].getAttribute("name")] = nodeVal(get1(datas[i], "value"));
            }
 
-           function getWayIssueIfAny(node1, node2, way) {
-             if (node1.id === node2.id || node1.hasInterestingTags() && node2.hasInterestingTags()) {
-               return null;
-             }
+           for (i = 0; i < simpleDatas.length; i++) {
+             properties[simpleDatas[i].getAttribute("name")] = nodeVal(simpleDatas[i]);
+           }
+         }
 
-             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;
-             }
+         if (visibility) {
+           properties.visibility = nodeVal(visibility);
+         }
 
-             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'));
+         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
+           },
+           properties: properties
+         };
+         if (root.getAttribute("id")) feature.id = root.getAttribute("id");
+         return feature;
+       }
+
+       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];
+                 }
+
+                 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"));
                    }
-                 }), 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);
+                   styleMapIndex["#" + styleMaps[l].getAttribute("id")] = pairsMap;
+                 }
+
+                 j = 0;
+
+               case 9:
+                 if (!(j < placemarks.length)) {
+                   _context3.next = 17;
+                   break;
+                 }
+
+                 feature = getPlacemark(placemarks[j], styleIndex, styleMapIndex, styleByHash);
+
+                 if (!feature) {
+                   _context3.next = 14;
+                   break;
+                 }
+
+                 _context3.next = 14;
+                 return feature;
+
+               case 14:
+                 j++;
+                 _context3.next = 9;
+                 break;
+
+               case 17:
+               case "end":
+                 return _context3.stop();
              }
            }
-         };
+         }, _marked3);
+       }
 
-         validation.type = type;
-         return validation;
+       function kml(doc) {
+         return {
+           type: "FeatureCollection",
+           features: Array.from(kmlGen(doc))
+         };
        }
 
-       function validationCrossingWays(context) {
-         var type = 'crossing_ways'; // returns the way or its parent relation, whichever has a useful feature type
+       var _initialized = false;
+       var _enabled = 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 _geojson;
 
-             for (var i = 0; i < parentRels.length; i++) {
-               var rel = parentRels[i];
+       function svgData(projection, context, dispatch) {
+         var throttledRedraw = throttle(function () {
+           dispatch.call('change');
+         }, 1000);
 
-               if (getFeatureType(rel, graph) !== null) {
-                 return rel;
-               }
-             }
+         var _showLabels = true;
+         var detected = utilDetect();
+         var layer = select(null);
+
+         var _vtService;
+
+         var _fileList;
+
+         var _template;
+
+         var _src;
+
+         function init() {
+           if (_initialized) return; // run once
+
+           _geojson = {};
+           _enabled = true;
+
+           function over(d3_event) {
+             d3_event.stopPropagation();
+             d3_event.preventDefault();
+             d3_event.dataTransfer.dropEffect = 'copy';
            }
 
-           return way;
+           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 hasTag(tags, key) {
-           return tags[key] !== undefined && tags[key] !== 'no';
+         function getService() {
+           if (services.vectorTile && !_vtService) {
+             _vtService = services.vectorTile;
+
+             _vtService.event.on('loadedData', throttledRedraw);
+           } else if (!services.vectorTile && _vtService) {
+             _vtService = null;
+           }
+
+           return _vtService;
          }
 
-         function taggedAsIndoor(tags) {
-           return hasTag(tags, 'indoor') || hasTag(tags, 'level') || tags.highway === 'corridor';
+         function showLayer() {
+           layerOn();
+           layer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end', function () {
+             dispatch.call('change');
+           });
          }
 
-         function allowsBridge(featureType) {
-           return featureType === 'highway' || featureType === 'railway' || featureType === 'waterway';
+         function hideLayer() {
+           throttledRedraw.cancel();
+           layer.transition().duration(250).style('opacity', 0).on('end', layerOff);
          }
 
-         function allowsTunnel(featureType) {
-           return featureType === 'highway' || featureType === 'railway' || featureType === 'waterway';
-         } // discard
+         function layerOn() {
+           layer.style('display', 'block');
+         }
 
+         function layerOff() {
+           layer.selectAll('.viewfield-group').remove();
+           layer.style('display', 'none');
+         } // ensure that all geojson features in a collection have IDs
 
-         var ignoredBuildings = {
-           demolished: true,
-           dismantled: true,
-           proposed: true,
-           razed: true
-         };
 
-         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
+         function ensureIDs(gj) {
+           if (!gj) return null;
 
-           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;
-         }
+           if (gj.type === 'FeatureCollection') {
+             for (var i = 0; i < gj.features.length; i++) {
+               ensureFeatureID(gj.features[i]);
+             }
+           } else {
+             ensureFeatureID(gj);
+           }
 
-         function isLegitCrossing(tags1, featureType1, tags2, featureType2) {
-           // assume 0 by default
-           var level1 = tags1.level || '0';
-           var level2 = tags2.level || '0';
+           return gj;
+         } // ensure that each single Feature object has a unique ID
 
-           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 ensureFeatureID(feature) {
+           if (!feature) return;
+           feature.__featurehash__ = utilHashcode(fastJsonStableStringify(feature));
+           return feature;
+         } // Prefer an array of Features instead of a FeatureCollection
 
-           var layer1 = tags1.layer || '0';
-           var layer2 = tags2.layer || '0';
 
-           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 getFeatures(gj) {
+           if (!gj) return [];
 
-             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;
+           if (gj.type === 'FeatureCollection') {
+             return gj.features;
+           } else {
+             return [gj];
+           }
+         }
 
-           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
+         function featureKey(d) {
+           return d.__featurehash__;
+         }
 
-             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
+         function isPolygon(d) {
+           return d.geometry.type === 'Polygon' || d.geometry.type === 'MultiPolygon';
+         }
 
+         function clipPathID(d) {
+           return 'ideditor-data-' + d.__featurehash__ + '-clippath';
+         }
 
-           if (featureType1 === 'waterway' && featureType2 === 'highway' && tags2.man_made === 'pier') return true;
-           if (featureType2 === 'waterway' && featureType1 === 'highway' && tags1.man_made === 'pier') return true;
+         function featureClasses(d) {
+           return ['data' + d.__featurehash__, d.geometry.type, isPolygon(d) ? 'area' : '', d.__layerID__ || ''].filter(Boolean).join(' ');
+         }
 
-           if (featureType1 === 'building' || featureType2 === 'building') {
-             // for building crossings, different layers are enough
-             if (layer1 !== layer2) return true;
+         function drawData(selection) {
+           var vtService = getService();
+           var getPath = svgPath(projection).geojson;
+           var getAreaPath = svgPath(projection, null, true).geojson;
+           var hasData = drawData.hasData();
+           layer = selection.selectAll('.layer-mapdata').data(_enabled && hasData ? [0] : []);
+           layer.exit().remove();
+           layer = layer.enter().append('g').attr('class', 'layer-mapdata').merge(layer);
+           var surface = context.surface();
+           if (!surface || surface.empty()) return; // not ready to draw yet, starting up
+           // Gather data
+
+           var geoData, polygonData;
+
+           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);
            }
 
-           return false;
-         } // highway values for which we shouldn't recommend connecting to waterways
+           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 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 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
 
-         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';
+           var pathData = {
+             fill: polygonData,
+             shadow: geoData,
+             stroke: geoData
+           };
+           var paths = datagroups.selectAll('path').data(function (layer) {
+             return pathData[layer];
+           }, featureKey); // exit
 
-           if (featureType1 === featureType2) {
-             if (featureType1 === 'highway') {
-               var entity1IsPath = osmPathHighwayTagValues[entity1.tags.highway];
-               var entity2IsPath = osmPathHighwayTagValues[entity2.tags.highway];
+           paths.exit().remove(); // enter/update
 
-               if ((entity1IsPath || entity2IsPath) && entity1IsPath !== entity2IsPath) {
-                 // one feature is a path but not both
-                 var roadFeature = entity1IsPath ? entity2 : entity1;
+           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
 
-                 if (nonCrossingHighways[roadFeature.tags.highway]) {
-                   // don't mark path connections with certain roads as crossings
-                   return {};
-                 }
+           layer.call(drawLabels, 'label-halo', geoData).call(drawLabels, 'label', geoData);
 
-                 var pathFeature = entity1IsPath ? entity1 : entity2;
+           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
 
-                 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
+             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];
+             });
+           }
+         }
 
-                 return bothLines ? {
-                   highway: 'crossing'
-                 } : {};
-               }
+         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];
+         }
 
-               return {};
-             }
+         function xmlToDom(textdata) {
+           return new DOMParser().parseFromString(textdata, 'text/xml');
+         }
 
-             if (featureType1 === 'waterway') return {};
-             if (featureType1 === 'railway') return {};
-           } else {
-             var featureTypes = [featureType1, featureType2];
+         drawData.setFile = function (extension, data) {
+           _template = null;
+           _fileList = null;
+           _geojson = null;
+           _src = null;
+           var gj;
 
-             if (featureTypes.indexOf('highway') !== -1) {
-               if (featureTypes.indexOf('railway') !== -1) {
-                 if (!bothLines) return {};
-                 var isTram = entity1.tags.railway === 'tram' || entity2.tags.railway === 'tram';
+           switch (extension) {
+             case '.gpx':
+               gj = gpx(xmlToDom(data));
+               break;
 
-                 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
+             case '.kml':
+               gj = kml(xmlToDom(data));
+               break;
 
-                   return {
-                     railway: 'crossing'
-                   };
-                 } else {
-                   // path-tram connections use this tag
-                   if (isTram) return {
-                     railway: 'tram_level_crossing'
-                   }; // other road-rail connections use this tag
+             case '.geojson':
+             case '.json':
+               gj = JSON.parse(data);
+               break;
+           }
 
-                   return {
-                     railway: 'level_crossing'
-                   };
-                 }
-               }
+           gj = gj || {};
 
-               if (featureTypes.indexOf('waterway') !== -1) {
-                 // do not allow fords on structures
-                 if (hasTag(entity1.tags, 'tunnel') && hasTag(entity2.tags, 'tunnel')) return null;
-                 if (hasTag(entity1.tags, 'bridge') && hasTag(entity2.tags, 'bridge')) return null;
+           if (Object.keys(gj).length) {
+             _geojson = ensureIDs(gj);
+             _src = extension + ' data file';
+             this.fitZoom();
+           }
 
-                 if (highwaysDisallowingFords[entity1.tags.highway] || highwaysDisallowingFords[entity2.tags.highway]) {
-                   // do not allow fords on major highways
-                   return null;
-                 }
+           dispatch.call('change');
+           return this;
+         };
 
-                 return bothLines ? {
-                   ford: 'yes'
-                 } : {};
-               }
-             }
+         drawData.showLabels = function (val) {
+           if (!arguments.length) return _showLabels;
+           _showLabels = val;
+           return this;
+         };
+
+         drawData.enabled = function (val) {
+           if (!arguments.length) return _enabled;
+           _enabled = val;
+
+           if (_enabled) {
+             showLayer();
+           } else {
+             hideLayer();
            }
 
-           return null;
-         }
+           dispatch.call('change');
+           return this;
+         };
 
-         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
+         drawData.hasData = function () {
+           var gj = _geojson || {};
+           return !!(_template || Object.keys(gj).length);
+         };
 
-           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 = {};
+         drawData.template = function (val, src) {
+           if (!arguments.length) return _template; // test source against OSM imagery blocklists..
 
-           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
+           var osm = context.connection();
 
-             segmentInfos = tree.waySegments(extent, graph);
+           if (osm) {
+             var blocklists = osm.imageryBlocklists();
+             var fail = false;
+             var tested = 0;
+             var regex;
 
-             for (j = 0; j < segmentInfos.length; j++) {
-               segment2Info = segmentInfos[j]; // don't check for self-intersection in this validation
+             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.
 
-               if (segment2Info.wayId === way1.id) continue; // skip if this way was already checked and only one issue is needed
 
-               if (checkedSingleCrossingWays[segment2Info.wayId]) continue; // mark this way as checked even if there are no crossings
+             if (!tested) {
+               regex = /.*\.google(apis)?\..*\/(vt|kh)[\?\/].*([xyz]=.*){3}.*/;
+               fail = regex.test(val);
+             }
+           }
+
+           _template = val;
+           _fileList = null;
+           _geojson = null; // strip off the querystring/hash from the template,
+           // it often includes the access token
+
+           _src = src || 'vectortile:' + val.split(/[?#]/)[0];
+           dispatch.call('change');
+           return this;
+         };
 
-               comparedWays[segment2Info.wayId] = true;
-               way2 = graph.hasEntity(segment2Info.wayId);
-               if (!way2) continue;
-               taggedFeature2 = getFeatureWithFeatureTypeTagsForWay(way2, graph); // only check crossing highway, waterway, building, and railway
+         drawData.geojson = function (gj, src) {
+           if (!arguments.length) return _geojson;
+           _template = null;
+           _fileList = null;
+           _geojson = null;
+           _src = null;
+           gj = gj || {};
 
-               way2FeatureType = getFeatureType(taggedFeature2, graph);
+           if (Object.keys(gj).length) {
+             _geojson = ensureIDs(gj);
+             _src = src || 'unknown.geojson';
+           }
 
-               if (way2FeatureType === null || isLegitCrossing(taggedFeature1.tags, way1FeatureType, taggedFeature2.tags, way2FeatureType)) {
-                 continue;
-               } // create only one issue for building crossings
+           dispatch.call('change');
+           return this;
+         };
 
+         drawData.fileList = function (fileList) {
+           if (!arguments.length) return _fileList;
+           _template = null;
+           _fileList = fileList;
+           _geojson = null;
+           _src = null;
+           if (!fileList || !fileList.length) return this;
+           var f = fileList[0];
+           var extension = getExtension(f.name);
+           var reader = new FileReader();
 
-               oneOnly = way1FeatureType === 'building' || way2FeatureType === 'building';
-               nAId = segment2Info.nodes[0];
-               nBId = segment2Info.nodes[1];
+           reader.onload = function () {
+             return function (e) {
+               drawData.setFile(extension, e.target.result);
+             };
+           }();
 
-               if (nAId === n1.id || nAId === n2.id || nBId === n1.id || nBId === n2.id) {
-                 // n1 or n2 is a connection node; skip
-                 continue;
-               }
+           reader.readAsText(f);
+           return this;
+         };
 
-               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);
+         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 (point) {
-                 edgeCrossInfos.push({
-                   wayInfos: [{
-                     way: way1,
-                     featureType: way1FeatureType,
-                     edge: [n1.id, n2.id]
-                   }, {
-                     way: way2,
-                     featureType: way2FeatureType,
-                     edge: [nA.id, nB.id]
-                   }],
-                   crossPoint: point
-                 });
+           var testUrl = url.split(/[?#]/)[0];
+           var extension = getExtension(testUrl) || defaultExtension;
 
-                 if (oneOnly) {
-                   checkedSingleCrossingWays[way2.id] = true;
-                   break;
-                 }
-               }
-             }
+           if (extension) {
+             _template = null;
+             d3_text(url).then(function (data) {
+               drawData.setFile(extension, data);
+             })["catch"](function () {
+               /* ignore */
+             });
+           } else {
+             drawData.template(url);
            }
 
-           return edgeCrossInfos;
-         }
+           return this;
+         };
 
-         function waysToCheck(entity, graph) {
-           var featureType = getFeatureType(entity, graph);
-           if (!featureType) return [];
+         drawData.getSrc = function () {
+           return _src || '';
+         };
 
-           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
+         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 */
 
-                 if (entity && array.indexOf(entity) === -1) {
-                   array.push(entity);
-                 }
-               }
+             switch (geom.type) {
+               case 'Point':
+                 c = [c];
 
-               return array;
-             }, []);
-           }
+               case 'MultiPoint':
+               case 'LineString':
+                 break;
 
-           return [];
-         }
+               case 'MultiPolygon':
+                 c = utilArrayFlatten(c);
 
-         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
+               case 'Polygon':
+               case 'MultiLineString':
+                 c = utilArrayFlatten(c);
+                 break;
+             }
+             /* eslint-enable no-fallthrough */
 
-           var wayIndex, crossingIndex, crossings;
 
-           for (wayIndex in ways) {
-             crossings = findCrossingsByWay(ways[wayIndex], graph, tree);
+             return utilArrayUnion(coords, c);
+           }, []);
 
-             for (crossingIndex in crossings) {
-               issues.push(createIssue(crossings[crossingIndex], graph));
-             }
+           if (!geoPolygonIntersectsPolygon(viewport, coords, true)) {
+             var extent = geoExtent(d3_geoBounds({
+               type: 'LineString',
+               coordinates: coords
+             }));
+             map.centerZoom(extent.center(), map.trimmedExtentZoom(extent));
            }
 
-           return issues;
+           return this;
          };
 
-         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;
+         init();
+         return drawData;
+       }
 
-             if (type1 === type2) {
-               return utilDisplayLabel(way1Info.way, graph) > utilDisplayLabel(way2Info.way, graph);
-             } else if (type1 === 'waterway') {
-               return true;
-             } else if (type2 === 'waterway') {
-               return false;
-             }
+       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 = [];
 
-             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 (showTile) {
+             debugData.push({
+               "class": 'red',
+               label: 'tile'
+             });
+           }
 
-           if (isCrossingIndoors) {
-             crossingTypeID = 'indoor-indoor';
-           } else if (isCrossingTunnels) {
-             crossingTypeID = 'tunnel-tunnel';
-           } else if (isCrossingBridges) {
-             crossingTypeID = 'bridge-bridge';
+           if (showCollision) {
+             debugData.push({
+               "class": 'yellow',
+               label: 'collision'
+             });
            }
 
-           if (connectionTags && (isCrossingIndoors || isCrossingTunnels || isCrossingBridges)) {
-             crossingTypeID += '_connectable';
+           if (showImagery) {
+             debugData.push({
+               "class": 'orange',
+               label: 'imagery'
+             });
            }
 
-           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 (showTouchTargets) {
+             debugData.push({
+               "class": 'pink',
+               label: 'touchTargets'
+             });
+           }
 
-               if (connectionTags) {
-                 fixes.push(makeConnectWaysFix(this.data.connectionTags));
-               }
+           if (showDownloaded) {
+             debugData.push({
+               "class": 'purple',
+               label: 'downloaded'
+             });
+           }
 
-               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 legend = context.container().select('.main-content').selectAll('.debug-legend').data(debugData.length ? [0] : []);
+           legend.exit().remove();
+           legend = legend.enter().append('div').attr('class', 'fillD debug-legend').merge(legend);
+           var legendItems = legend.selectAll('.debug-legend-item').data(debugData, function (d) {
+             return d.label;
+           });
+           legendItems.exit().remove();
+           legendItems.enter().append('span').attr('class', function (d) {
+             return "debug-legend-item ".concat(d["class"]);
+           }).text(function (d) {
+             return d.label;
+           });
+           var layer = selection.selectAll('.layer-debug').data(showImagery || showDownloaded ? [0] : []);
+           layer.exit().remove();
+           layer = layer.enter().append('g').attr('class', 'layer-debug').merge(layer); // imagery
 
+           var 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
 
-                 var skipTunnelFix = otherFeatureType === 'waterway' && selectedFeatureType !== 'waterway';
+           var osm = context.connection();
+           var dataDownloaded = [];
 
-                 if (allowsTunnel(selectedFeatureType) && !skipTunnelFix) {
-                   fixes.push(makeAddBridgeOrTunnelFix('add_a_tunnel', 'temaki-tunnel', 'tunnel'));
+           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]]]
                  }
-               } // 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;
-             }
-           });
+           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 showReference(selection) {
-             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.crossing_ways.' + crossingTypeID + '.reference'));
-           }
-         }
+           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.
 
-         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];
-               }
+         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;
+           }
+         };
 
-               var crossingLoc = this.issue.loc;
-               var projection = context.projection;
+         return drawDebug;
+       }
 
-               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
+       /*
+           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.
+       */
 
-                 var structLengthMeters = crossedWay && crossedWay.tags.width && parseFloat(crossedWay.tags.width);
+       function svgDefs(context) {
+         var _defsSelection = select(null);
 
-                 if (!structLengthMeters) {
-                   // if no explicit width is set, approximate the width based on the tags
-                   structLengthMeters = crossedWay && crossedWay.impliedLineWidthMeters();
-                 }
+         var _spritesheetIds = ['iD-sprite', 'maki-sprite', 'temaki-sprite', 'fa-sprite', 'community-sprite'];
 
-                 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 drawDefs(selection) {
+           _defsSelection = selection.append('defs'); // add markers
 
-                 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
+           _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)
 
-                 structLengthMeters = structLengthMeters / 2 / Math.sin(crossingAngle) * 2; // add padding since the structure must extend past the edges of the crossed feature
 
-                 structLengthMeters += 4; // clamp the length to a reasonable range
+           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);
+           }
 
-                 structLengthMeters = Math.min(Math.max(structLengthMeters, 4), 50);
+           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
 
-                 function geomToProj(geoPoint) {
-                   return [geoLonToMeters(geoPoint[0], geoPoint[1]), geoLatToMeters(geoPoint[1])];
-                 }
+           addSidedMarker('coastline', '#77dede', 1);
+           addSidedMarker('waterway', '#77dede', 1); // barriers have a dashed line, and separating the triangle
+           // from the line visually suits that
 
-                 function projToGeom(projPoint) {
-                   var lat = geoMetersToLat(projPoint[1]);
-                   return [geoMetersToLon(projPoint[0], lat), lat];
-                 }
+           addSidedMarker('barrier', '#ddd', 1);
+           addSidedMarker('man_made', '#fff', 0);
 
-                 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);
+           _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 locSphericalDistanceFromCrossingLoc(angle, distanceMeters) {
-                   var lengthSphericalMeters = distanceMeters * linearToSphericalMetersRatio;
-                   return projToGeom([projectedCrossingLoc[0] + Math.cos(angle) * lengthSphericalMeters, projectedCrossingLoc[1] + Math.sin(angle) * lengthSphericalMeters]);
-                 }
+           _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 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
+           var patterns = _defsSelection.selectAll('pattern').data([// pattern name, pattern image name
+           ['beach', 'dots'], ['construction', 'construction'], ['cemetery', 'cemetery'], ['cemetery_christian', 'cemetery_christian'], ['cemetery_buddhist', 'cemetery_buddhist'], ['cemetery_muslim', 'cemetery_muslim'], ['cemetery_jewish', 'cemetery_jewish'], ['farmland', 'farmland'], ['farmyard', 'farmyard'], ['forest', 'forest'], ['forest_broadleaved', 'forest_broadleaved'], ['forest_needleleaved', 'forest_needleleaved'], ['forest_leafless', 'forest_leafless'], ['golf_green', 'grass'], ['grass', 'grass'], ['landfill', 'landfill'], ['meadow', 'grass'], ['orchard', 'orchard'], ['pond', 'pond'], ['quarry', 'quarry'], ['scrub', 'bushes'], ['vineyard', 'vineyard'], ['water_standing', 'lines'], ['waves', 'waves'], ['wetland', 'wetland'], ['wetland_marsh', 'wetland_marsh'], ['wetland_swamp', 'wetland_swamp'], ['wetland_bog', 'wetland_bog'], ['wetland_reedbed', 'wetland_reedbed']]).enter().append('pattern').attr('id', function (d) {
+             return 'ideditor-pattern-' + d[0];
+           }).attr('width', 32).attr('height', 32).attr('patternUnits', 'userSpaceOnUse');
 
+           patterns.append('rect').attr('x', 0).attr('y', 0).attr('width', 32).attr('height', 32).attr('class', function (d) {
+             return 'pattern-color-' + d[0];
+           });
+           patterns.append('image').attr('x', 0).attr('y', 0).attr('width', 32).attr('height', 32).attr('xlink:href', function (d) {
+             return context.imagePath('pattern/' + d[1] + '.png');
+           }); // add clip paths
 
-                 var minEdgeLengthMeters = 0.55; // decide where to bound the structure along the way, splitting as necessary
+           _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 determineEndpoint(edge, endNode, locGetter) {
-                   var newNode;
-                   var idealLengthMeters = structLengthMeters / 2; // distance between the crossing location and the end of the edge,
-                   // the maximum length of this side of the structure
 
-                   var crossingToEdgeEndDistance = geoSphericalDistance(crossingLoc, endNode.loc);
+           addSprites(_spritesheetIds, true);
+         }
 
-                   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;
-                           }
-                         }
-                       });
-                     });
+         function addSprites(ids, overrideColors) {
+           _spritesheetIds = utilArrayUniq(_spritesheetIds.concat(ids));
 
-                     if (edgeCount >= 3) {
-                       // the end node is a junction, try to leave a segment
-                       // between it and the structure - #7202
-                       var insetLength = crossingToEdgeEndDistance - minEdgeLengthMeters;
+           var spritesheets = _defsSelection.selectAll('.spritesheet').data(_spritesheetIds);
 
-                       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
+           spritesheets.enter().append('g').attr('class', function (d) {
+             return 'spritesheet spritesheet-' + d;
+           }).each(function (d) {
+             var url = context.imagePath(d + '.svg');
+             var node = select(this).node();
+             svg(url).then(function (svg) {
+               node.appendChild(select(svg.documentElement).attr('id', 'ideditor-' + d).node());
 
+               if (overrideColors && d !== 'iD-sprite') {
+                 // allow icon colors to be overridden..
+                 select(node).selectAll('path').attr('fill', 'currentColor');
+               }
+             })["catch"](function () {
+               /* ignore */
+             });
+           });
+           spritesheets.exit().remove();
+         }
 
-                   if (!newNode) newNode = endNode;
-                   var splitAction = actionSplit([newNode.id]).limitWays(resultWayIDs); // only split selected or created ways
-                   // do the split
+         drawDefs.addSprites = addSprites;
+         return drawDefs;
+       }
 
-                   graph = splitAction(graph);
+       var _layerEnabled$2 = false;
 
-                   if (splitAction.getCreatedWayIDs().length) {
-                     resultWayIDs.push(splitAction.getCreatedWayIDs()[0]);
-                   }
+       var _qaService$2;
 
-                   return newNode;
-                 }
+       function svgKeepRight(projection, context, dispatch) {
+         var throttledRedraw = throttle(function () {
+           return dispatch.call('change');
+         }, 1000);
 
-                 var structEndNode1 = determineEndpoint(edge, edgeNodes[1], endpointLocGetter1);
-                 var structEndNode2 = determineEndpoint([edgeNodes[0].id, structEndNode1.id], edgeNodes[0], endpointLocGetter2);
-                 var structureWay = resultWayIDs.map(function (id) {
-                   return graph.entity(id);
-                 }).find(function (way) {
-                   return way.nodes.indexOf(structEndNode1.id) !== -1 && way.nodes.indexOf(structEndNode2.id) !== -1;
-                 });
-                 var tags = Object.assign({}, structureWay.tags); // copy tags
+         var minZoom = 12;
+         var touchLayer = select(null);
+         var drawLayer = select(null);
+         var layerVisible = false;
 
-                 if (bridgeOrTunnel === 'bridge') {
-                   tags.bridge = 'yes';
-                   tags.layer = '1';
-                 } else {
-                   var tunnelValue = 'yes';
+         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.
 
-                   if (getFeatureType(structureWay, graph) === 'waterway') {
-                     // use `tunnel=culvert` for waterways by default
-                     tunnelValue = 'culvert';
-                   }
 
-                   tags.tunnel = tunnelValue;
-                   tags.layer = '-1';
-                 } // apply the structure tags to the way
+         function getService() {
+           if (services.keepRight && !_qaService$2) {
+             _qaService$2 = services.keepRight;
 
+             _qaService$2.on('loaded', throttledRedraw);
+           } else if (!services.keepRight && _qaService$2) {
+             _qaService$2 = null;
+           }
 
-                 graph = actionChangeTags(structureWay.id, tags)(graph);
-                 return graph;
-               };
+           return _qaService$2;
+         } // Show the markers
 
-               context.perform(action, _t('issues.fix.' + fixTitleID + '.annotation'));
-               context.enter(modeSelect(context, resultWayIDs));
-             }
-           });
-         }
 
-         function makeConnectWaysFix(connectionTags) {
-           var fixTitleID = 'connect_features';
+         function editOn() {
+           if (!layerVisible) {
+             layerVisible = true;
+             drawLayer.style('display', 'block');
+           }
+         } // Immediately remove the markers and their touch targets
 
-           if (connectionTags.ford) {
-             fixTitleID = 'connect_using_ford';
+
+         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.
 
-           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
 
-                   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);
-                   }
-                 });
+         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.
 
-                 if (nodesToMerge.length > 1) {
-                   // if we're using nearby nodes, merge them with the new node
-                   graph = actionMergeNodes(nodesToMerge, loc)(graph);
-                 }
 
-                 return graph;
-               }, _t('issues.fix.connect_crossing_features.annotation'));
-             }
+         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
 
-         function makeChangeLayerFix(higherOrLower) {
-           return new validationIssueFix({
-             icon: 'iD-icon-' + (higherOrLower === 'higher' ? 'up' : 'down'),
-             title: _t.html('issues.fix.tag_this_as_' + higherOrLower + '.title'),
-             onClick: function onClick(context) {
-               var mode = context.mode();
-               if (!mode || mode.id !== 'select') return;
-               var selectedIDs = mode.selectedIDs();
-               if (selectedIDs.length !== 1) return;
-               var selectedID = selectedIDs[0];
-               if (!this.issue.entityIds.some(function (entityId) {
-                 return entityId === selectedID;
-               })) return;
-               var entity = context.hasEntity(selectedID);
-               if (!entity) return;
-               var tags = Object.assign({}, entity.tags); // shallow copy
 
-               var layer = tags.layer && Number(tags.layer);
+         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 (layer && !isNaN(layer)) {
-                 if (higherOrLower === 'higher') {
-                   layer += 1;
-                 } else {
-                   layer -= 1;
-                 }
-               } else {
-                 if (higherOrLower === 'higher') {
-                   layer = 1;
-                 } else {
-                   layer = -1;
-                 }
-               }
+           var markers = drawLayer.selectAll('.qaItem.keepRight').data(data, function (d) {
+             return d.id;
+           }); // exit
 
-               tags.layer = layer.toString();
-               context.perform(actionChangeTags(entity.id, tags), _t('operations.change_tags.annotation'));
-             }
+           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
 
-         validation.type = type;
-         return validation;
-       }
+           markers.merge(markersEnter).sort(sortY).classed('selected', function (d) {
+             return d.id === selectedID;
+           }).attr('transform', getTransform); // Draw targets..
 
-       function validationDisconnectedWay() {
-         var type = 'disconnected_way';
+           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
 
-         function isTaggedAsHighway(entity) {
-           return osmRoutableHighwayTagValues[entity.tags.highway];
-         }
+           targets.exit().remove(); // enter/update
 
-         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
-           })];
+           targets.enter().append('rect').attr('width', '20px').attr('height', '20px').attr('x', '-8px').attr('y', '-22px').merge(targets).sort(sortY).attr('class', function (d) {
+             return "qaItem ".concat(d.service, " target ").concat(fillClass, " itemId-").concat(d.id);
+           }).attr('transform', getTransform);
 
-           function makeFixes(context) {
-             var fixes = [];
-             var singleEntity = this.entityIds.length === 1 && context.hasEntity(this.entityIds[0]);
+           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.
 
-             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 (!fixes.length) {
-                 fixes.push(new validationIssueFix({
-                   title: _t.html('issues.fix.connect_feature.title')
-                 }));
-               }
+         function drawKeepRight(selection) {
+           var service = getService();
+           var surface = context.surface();
 
-               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 (surface && !surface.empty()) {
+             touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
+           }
 
-                   if (!operation.disabled()) {
-                     operation();
-                   }
-                 }
-               }));
+           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);
+
+           if (_layerEnabled$2) {
+             if (service && ~~context.map().zoom() >= minZoom) {
+               editOn();
+               service.loadIssues(projection);
+               updateMarkers();
              } else {
-               fixes.push(new validationIssueFix({
-                 title: _t.html('issues.fix.connect_features.title')
-               }));
+               editOff();
              }
-
-             return fixes;
            }
+         } // Toggles the layer on and off
 
-           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 routingIslandForEntity(entity) {
-             var routingIsland = new Set(); // the interconnected routable features
+         drawKeepRight.enabled = function (val) {
+           if (!arguments.length) return _layerEnabled$2;
+           _layerEnabled$2 = val;
 
-             var waysToCheck = []; // the queue of remaining routable ways to traverse
+           if (_layerEnabled$2) {
+             layerOn();
+           } else {
+             layerOff();
 
-             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 (context.selectedErrorID()) {
+               context.enter(modeBrowse(context));
              }
+           }
 
-             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;
-             }
+           dispatch.call('change');
+           return this;
+         };
 
-             while (waysToCheck.length) {
-               var wayToCheck = waysToCheck.pop();
-               var childNodes = graph.childNodes(wayToCheck);
+         drawKeepRight.supported = function () {
+           return !!getService();
+         };
 
-               for (var i in childNodes) {
-                 var vertex = childNodes[i];
+         return drawKeepRight;
+       }
 
-                 if (isConnectedVertex(vertex)) {
-                   // found a link to the wider network, not a routing island
-                   return null;
-                 }
+       function svgGeolocate(projection) {
+         var layer = select(null);
 
-                 if (isRoutableNode(vertex)) {
-                   routingIsland.add(vertex);
-                 }
+         var _position;
 
-                 queueParentWays(vertex);
-               }
-             } // no network link found, this is a routing island, return its members
+         function init() {
+           if (svgGeolocate.initialized) return; // run once
 
+           svgGeolocate.enabled = false;
+           svgGeolocate.initialized = true;
+         }
 
-             return routingIsland;
-           }
+         function showLayer() {
+           layer.style('display', 'block');
+         }
 
-           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
+         function hideLayer() {
+           layer.transition().duration(250).style('opacity', 0);
+         }
 
-             if (vertex.tags.entrance && vertex.tags.entrance !== 'no') return true;
-             if (vertex.tags.amenity === 'parking_entrance') return true;
-             return false;
-           }
+         function layerOn() {
+           layer.style('opacity', 0).transition().duration(250).style('opacity', 1);
+         }
 
-           function isRoutableNode(node) {
-             // treat elevators as distinct features in the highway network
-             if (node.tags.highway === 'elevator') return true;
-             return false;
-           }
+         function layerOff() {
+           layer.style('display', 'none');
+         }
 
-           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;
-             });
-           }
+         function transform(d) {
+           return svgPointTransform(projection)(d);
+         }
 
-           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
+         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...
 
-                 var map = context.map();
+           return Math.round(projectedLoc[1] - projectedTangent[1]).toString();
+         }
 
-                 if (!context.editable() || !map.trimmedExtent().contains(vertex.loc)) {
-                   map.zoomToEase(vertex);
-                 }
+         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));
+         }
 
-                 context.enter(modeDrawLine(context, wayId, context.graph(), 'line', way.affix(vertexId), true));
-               }
-             });
+         function drawLocation(selection) {
+           var enabled = svgGeolocate.enabled;
+           layer = selection.selectAll('.layer-geolocate').data([0]);
+           layer.exit().remove();
+           var layerEnter = layer.enter().append('g').attr('class', 'layer-geolocate').style('display', enabled ? 'block' : 'none');
+           layerEnter.append('g').attr('class', 'geolocations');
+           layer = layerEnter.merge(layer);
+
+           if (enabled) {
+             update();
+           } else {
+             layerOff();
+           }
+         }
+
+         drawLocation.enabled = function (position, enabled) {
+           if (!arguments.length) return svgGeolocate.enabled;
+           _position = position;
+           svgGeolocate.enabled = enabled;
+
+           if (svgGeolocate.enabled) {
+             showLayer();
+             layerOn();
+           } else {
+             hideLayer();
            }
+
+           return this;
          };
 
-         validation.type = type;
-         return validation;
+         init();
+         return drawLocation;
        }
 
-       function validationFormatting() {
-         var type = 'invalid_format';
+       function svgLabels(projection, context) {
+         var path = d3_geoPath(projection);
+         var detected = utilDetect();
+         var baselineHack = detected.ie || detected.browser.toLowerCase() === 'edge' || detected.browser.toLowerCase() === 'firefox' && detected.version >= 70;
 
-         var validation = function validation(entity) {
-           var issues = [];
+         var _rdrawn = new RBush();
 
-           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
+         var _rskipped = new RBush();
+
+         var _textWidthCache = {};
+         var _entitybboxes = {}; // Listed from highest to lowest priority
+
+         var labelStack = [['line', 'aeroway', '*', 12], ['line', 'highway', 'motorway', 12], ['line', 'highway', 'trunk', 12], ['line', 'highway', 'primary', 12], ['line', 'highway', 'secondary', 12], ['line', 'highway', 'tertiary', 12], ['line', 'highway', '*', 12], ['line', 'railway', '*', 12], ['line', 'waterway', '*', 12], ['area', 'aeroway', '*', 12], ['area', 'amenity', '*', 12], ['area', 'building', '*', 12], ['area', 'historic', '*', 12], ['area', 'leisure', '*', 12], ['area', 'man_made', '*', 12], ['area', 'natural', '*', 12], ['area', 'shop', '*', 12], ['area', 'tourism', '*', 12], ['area', 'camp_site', '*', 12], ['point', 'aeroway', '*', 10], ['point', 'amenity', '*', 10], ['point', 'building', '*', 10], ['point', 'historic', '*', 10], ['point', 'leisure', '*', 10], ['point', 'man_made', '*', 10], ['point', 'natural', '*', 10], ['point', 'shop', '*', 10], ['point', 'tourism', '*', 10], ['point', 'camp_site', '*', 10], ['line', 'name', '*', 12], ['area', 'name', '*', 12], ['point', 'name', '*', 10]];
+
+         function shouldSkipIcon(preset) {
+           var noIcons = ['building', 'landuse', 'natural'];
+           return noIcons.some(function (s) {
+             return preset.id.indexOf(s) >= 0;
+           });
+         }
+
+         function get(array, prop) {
+           return function (d, i) {
+             return array[i][prop];
+           };
+         }
+
+         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);
 
-             return !email || valid_email.test(email);
-           }
-           /*
-           function isSchemePresent(url) {
-               var valid_scheme = /^https?:\/\//i;
-               return (!url || valid_scheme.test(url));
+             if (str === null) {
+               return size / 3 * 2 * text.length;
+             } else {
+               return size / 3 * (2 * text.length + str.length);
+             }
            }
-           */
+         }
 
+         function drawLinePaths(selection, entities, filter, classes, labels) {
+           var paths = selection.selectAll('path').filter(filter).data(entities, osmEntity.key); // exit
 
-           function 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' : ''
-                   }));
-               }
-           }
-           */
+           paths.exit().remove(); // enter/update
 
+           paths.enter().append('path').style('stroke-width', get(labels, 'font-size')).attr('id', function (d) {
+             return 'ideditor-labelpath-' + d.id;
+           }).attr('class', classes).merge(paths).attr('d', get(labels, 'lineString'));
+         }
 
-           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);
-             });
+         function drawLineLabels(selection, entities, filter, classes, labels) {
+           var texts = selection.selectAll('text.' + classes).filter(filter).data(entities, osmEntity.key); // exit
 
-             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' : ''
-               }));
-             }
-           }
+           texts.exit().remove(); // enter
 
-           return issues;
-         };
+           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
 
-         validation.type = type;
-         return validation;
-       }
+           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 validationHelpRequest(context) {
-         var type = 'help_request';
+         function drawPointLabels(selection, entities, filter, classes, labels) {
+           var texts = selection.selectAll('text.' + classes).filter(filter).data(entities, osmEntity.key); // exit
 
-         var validation = function checkFixmeTag(entity) {
-           if (!entity.tags.fixme) return []; // don't flag fixmes on features added by the user
+           texts.exit().remove(); // enter/update
 
-           if (entity.version === undefined) return [];
+           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 (entity.v !== undefined) {
-             var baseEntity = context.history().base().hasEntity(entity.id); // don't flag fixmes added by the user on existing features
+         function drawAreaLabels(selection, entities, filter, classes, labels) {
+           entities = entities.filter(hasText);
+           labels = labels.filter(hasText);
+           drawPointLabels(selection, entities, filter, classes, labels);
 
-             if (!baseEntity || !baseEntity.tags.fixme) return [];
+           function hasText(d, i) {
+             return labels[i].hasOwnProperty('x') && labels[i].hasOwnProperty('y');
            }
+         }
 
-           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]
-           })];
+         function drawAreaIcons(selection, entities, filter, classes, labels) {
+           var icons = selection.selectAll('use.' + classes).filter(filter).data(entities, osmEntity.key); // exit
 
-           function showReference(selection) {
-             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.fixme_tag.reference'));
-           }
-         };
+           icons.exit().remove(); // enter/update
 
-         validation.type = type;
-         return validation;
-       }
+           icons.enter().append('use').attr('class', 'icon ' + classes).attr('width', '17px').attr('height', '17px').merge(icons).attr('transform', get(labels, 'transform')).attr('xlink:href', function (d) {
+             var preset = _mainPresetIndex.match(d, context.graph());
+             var picon = preset && preset.icon;
 
-       function validationImpossibleOneway() {
-         var type = 'impossible_oneway';
+             if (!picon) {
+               return '';
+             } else {
+               var isMaki = /^maki-/.test(picon);
+               return '#' + picon + (isMaki ? '-15' : '');
+             }
+           });
+         }
 
-         var validation = function checkImpossibleOneway(entity, graph) {
-           if (entity.type !== 'way' || entity.geometry(graph) !== 'line') return [];
-           if (entity.isClosed()) return [];
-           if (!typeForWay(entity)) return [];
-           if (!isOneway(entity)) return [];
-           var firstIssues = issuesForNode(entity, entity.first());
-           var lastIssues = issuesForNode(entity, entity.last());
-           return firstIssues.concat(lastIssues);
+         function drawCollisionBoxes(selection, rtree, which) {
+           var classes = 'debug ' + which + ' ' + (which === 'debug-skipped' ? 'orange' : 'yellow');
+           var gj = [];
 
-           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;
+           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]]]
+               };
+             });
            }
 
-           function isOneway(way) {
-             if (way.tags.oneway === 'yes') return true;
-             if (way.tags.oneway) return false;
+           var boxes = selection.selectAll('.' + which).data(gj); // exit
 
-             for (var key in way.tags) {
-               if (osmOneWayTags[key] && osmOneWayTags[key][way.tags[key]]) {
-                 return true;
-               }
-             }
+           boxes.exit().remove(); // enter/update
 
-             return false;
+           boxes.enter().append('path').attr('class', classes).merge(boxes).attr('d', d3_geoPath());
+         }
+
+         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;
+
+           for (i = 0; i < labelStack.length; i++) {
+             labelable.push([]);
            }
 
-           function nodeOccursMoreThanOnce(way, nodeID) {
-             var occurrences = 0;
+           if (fullRedraw) {
+             _rdrawn.clear();
 
-             for (var index in way.nodes) {
-               if (way.nodes[index] === nodeID) {
-                 occurrences += 1;
-                 if (occurrences > 1) return true;
-               }
-             }
+             _rskipped.clear();
 
-             return false;
-           }
+             _entitybboxes = {};
+           } else {
+             for (i = 0; i < entities.length; i++) {
+               entity = entities[i];
+               var toRemove = [].concat(_entitybboxes[entity.id] || []).concat(_entitybboxes[entity.id + 'I'] || []);
 
-           function isConnectedViaOtherTypes(way, node) {
-             var wayType = typeForWay(way);
+               for (j = 0; j < toRemove.length; j++) {
+                 _rdrawn.remove(toRemove[j]);
 
-             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;
+                 _rskipped.remove(toRemove[j]);
                }
              }
+           } // Loop through all the entities to do some preprocessing
 
-             return graph.parentWays(node).some(function (parentWay) {
-               if (parentWay.id === way.id) return false;
 
-               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
+           for (i = 0; i < entities.length; i++) {
+             entity = entities[i];
+             geometry = entity.geometry(graph); // Insert collision boxes around interesting points/vertices
 
-                 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
+             if (geometry === 'point' || geometry === 'vertex' && isInterestingVertex(entity)) {
+               var hasDirections = entity.directions(graph, projection).length;
+               var markerPadding;
 
-                   return parentRelation.isMultipolygon() && osmRoutableHighwayTagValues[parentRelation.tags.highway];
-                 });
-               } else if (wayType === 'waterway') {
-                 // multiple waterways may start or end at a water body at the same node
-                 if (parentWay.tags.natural === 'water' || parentWay.tags.natural === 'coastline') return true;
+               if (!wireframe && geometry === 'point' && !(zoom >= 18 && hasDirections)) {
+                 renderNodeAs[entity.id] = 'point';
+                 markerPadding = 20; // extra y for marker height
+               } else {
+                 renderNodeAs[entity.id] = 'vertex';
+                 markerPadding = 0;
                }
 
-               return false;
-             });
-           }
+               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
 
-           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
+             if (geometry === 'vertex') {
+               geometry = 'point';
+             } // Determine which entities are label-able
 
-             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
+             var preset = geometry === 'area' && _mainPresetIndex.match(entity, graph);
+             var icon = preset && !shouldSkipIcon(preset) && preset.icon;
+             if (!icon && !utilDisplayName(entity)) continue;
 
-             if (attachedOneways.length < attachedWaysOfSameType.length) return [];
+             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 (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 (geometry === matchGeom && hasVal && (matchVal === '*' || matchVal === hasVal)) {
+                 labelable[k].push(entity);
+                 break;
+               }
              }
+           }
 
-             var placement = isFirst ? 'start' : 'end',
-                 messageID = wayType + '.',
-                 referenceID = wayType + '.';
+           var positions = {
+             point: [],
+             line: [],
+             area: []
+           };
+           var labelled = {
+             point: [],
+             line: [],
+             area: []
+           }; // Try and find a valid label for labellable entities
 
-             if (wayType === 'waterway') {
-               messageID += 'connected.' + placement;
-               referenceID += 'connected';
-             } else {
-               messageID += placement;
-               referenceID += placement;
-             }
+           for (k = 0; k < labelable.length; k++) {
+             var fontSize = labelStack[k][3];
 
-             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 = [];
+             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 (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 (geometry === 'point' || geometry === 'vertex') {
+                 // no point or vertex labels in wireframe mode
+                 // no vertex labels at low zooms (vertices have no icons)
+                 if (wireframe) continue;
+                 var renderAs = renderNodeAs[entity.id];
+                 if (renderAs === 'vertex' && zoom < 17) continue;
+                 p = getPointLabel(entity, width, fontSize, renderAs);
+               } else if (geometry === 'line') {
+                 p = getLineLabel(entity, width, fontSize);
+               } else if (geometry === 'area') {
+                 p = getAreaLabel(entity, width, fontSize);
+               }
 
-                 if (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);
-                     }
-                   }));
-                 }
+               if (p) {
+                 if (geometry === 'vertex') {
+                   geometry = 'point';
+                 } // treat vertex like point
 
-                 return fixes;
-               },
-               loc: node.loc
-             })];
 
-             function getReference(referenceID) {
-               return function showReference(selection) {
-                 selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.impossible_oneway.' + referenceID + '.reference'));
-               };
+                 p.classes = geometry + ' tag-' + labelStack[k][1];
+                 positions[geometry].push(p);
+                 labelled[geometry].push(entity);
+               }
              }
            }
-         };
-
-         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 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.enter(modeDrawLine(context, way.id, context.graph(), 'line', way.affix(vertex.id), true));
-         }
-
-         validation.type = type;
-         return validation;
-       }
+           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..
 
-       function validationIncompatibleSource() {
-         var type = 'incompatible_source';
-         var invalidSources = [{
-           id: 'google',
-           regex: 'google',
-           exceptRegex: 'books.google|Google Books|drive.google|googledrive|Google Drive'
-         }];
+             var bbox;
 
-         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;
+             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
+               };
+             }
 
-           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 (tryInsert([bbox], entity.id, true)) {
+               return p;
+             }
            }
-         };
 
-         validation.type = type;
-         return validation;
-       }
+           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
 
-       function validationMaprules() {
-         var type = 'maprules';
+             var lineOffsets = [50, 45, 55, 40, 60, 35, 65, 30, 70, 25, 75, 20, 80, 15, 95, 10, 90, 5, 95];
+             var padding = 3;
 
-         var validation = function checkMaprules(entity, graph) {
-           if (!services.maprules) return [];
-           var rules = services.maprules.validationRules();
-           var issues = [];
+             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.
 
-           for (var i = 0; i < rules.length; i++) {
-             var rule = rules[i];
-             rule.findIssues(entity, graph, issues);
-           }
+               var sub = subpath(points, start, start + width);
 
-           return issues;
-         };
+               if (!sub || !geoPolygonIntersectsPolygon(viewport, sub, true)) {
+                 continue;
+               }
 
-         validation.type = type;
-         return validation;
-       }
+               var isReverse = reverse(sub);
 
-       function validationMismatchedGeometry() {
-         var type = 'mismatched_geometry';
+               if (isReverse) {
+                 sub = sub.reverse();
+               }
 
-         function tagSuggestingLineIsArea(entity) {
-           if (entity.type !== 'way' || entity.isClosed()) return null;
-           var tagSuggestingArea = entity.tagSuggestingArea();
+               var bboxes = [];
+               var boxsize = (height + 2) / 2;
 
-           if (!tagSuggestingArea) {
-             return null;
-           }
+               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 asLine = _mainPresetIndex.matchTags(tagSuggestingArea, 'line');
-           var asArea = _mainPresetIndex.matchTags(tagSuggestingArea, 'area');
+                 var num = Math.max(1, Math.floor(geoVecLength(a, b) / boxsize / 2));
 
-           if (asLine && asArea && asLine === asArea) {
-             // these tags also allow lines and making this an area wouldn't matter
-             return null;
-           }
+                 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)
+                   });
+                 }
+               }
 
-           return tagSuggestingArea;
-         }
+               if (tryInsert(bboxes, entity.id, false)) {
+                 // accept this one
+                 return {
+                   'font-size': height + 2,
+                   lineString: lineString(sub),
+                   startOffset: offset + '%'
+                 };
+               }
+             }
 
-         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 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);
+             }
 
-           if (firstToLastDistanceMeters < 0.75) {
-             testNodes = nodes.slice(); // shallow copy
+             function lineString(points) {
+               return 'M' + points.join('L');
+             }
 
-             testNodes.pop();
-             testNodes.push(testNodes[0]); // make sure this will not create a self-intersection
+             function subpath(points, from, to) {
+               var sofar = 0;
+               var start, end, i0, i1;
 
-             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
+               for (var i = 0; i < points.length - 1; i++) {
+                 var a = points[i];
+                 var b = points[i + 1];
+                 var current = geoVecLength(a, b);
+                 var portion;
 
+                 if (!start && sofar + current >= from) {
+                   portion = (from - sofar) / current;
+                   start = [a[0] + portion * (b[0] - a[0]), a[1] + portion * (b[1] - a[1])];
+                   i0 = i + 1;
+                 }
 
-           testNodes = nodes.slice(); // shallow copy
+                 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;
+                 }
 
-           testNodes.push(testNodes[0]); // make sure this will not create a self-intersection
+                 sofar += current;
+               }
 
-           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'));
-             };
+               var result = points.slice(i0, i1);
+               result.unshift(start);
+               result.push(end);
+               return result;
+             }
            }
-         }
-
-         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
 
-                   for (var key in tagSuggestingArea) {
-                     delete tags[key];
-                   }
+           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 = {};
 
-                   context.perform(actionChangeTags(entityId, tags), _t('issues.fix.remove_tag.annotation'));
-                 }
-               }));
-               return fixes;
+             if (picon) {
+               // icon and label..
+               if (addIcon()) {
+                 addLabel(iconSize + padding);
+                 return p;
+               }
+             } else {
+               // label only..
+               if (addLabel(0)) {
+                 return p;
+               }
              }
-           });
 
-           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 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 vertexTaggedAsPointIssue(entity, graph) {
-           // we only care about nodes
-           if (entity.type !== 'node') return null; // ignore tagless points
+               if (tryInsert([bbox], entity.id + 'I', true)) {
+                 p.transform = 'translate(' + iconX + ',' + iconY + ')';
+                 return true;
+               }
 
-           if (Object.keys(entity.tags).length === 0) return null; // address lines are special so just ignore them
+               return false;
+             }
 
-           if (entity.isOnAddressLine(graph)) return null;
-           var geometry = entity.geometry(graph);
-           var allowedGeometries = osmNodeGeometriesForTags(entity.tags);
+             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 (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()]));
-                   };
+                 if (tryInsert([bbox], entity.id, true)) {
+                   p.x = labelX;
+                   p.y = labelY;
+                   p.textAnchor = 'middle';
+                   p.height = height;
+                   return true;
                  }
-
-                 return [new validationIssueFix({
-                   icon: 'iD-operation-extract',
-                   title: _t.html('issues.fix.extract_point.title'),
-                   onClick: extractOnClick
-                 })];
                }
-             });
-           }
 
-           return null;
-         }
+               return false;
+             }
+           } // force insert a singular bounding box
+           // singular box only, no array, id better be unique
 
-         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
+           function doInsert(bbox, id) {
+             bbox.id = id;
+             var oldbox = _entitybboxes[id];
 
-             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()
-             });
-             issues.push(issue);
-           }
+             if (oldbox) {
+               _rdrawn.remove(oldbox);
+             }
 
-           return issues;
+             _entitybboxes[id] = bbox;
 
-           function showReference(selection) {
-             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.unclosed_multipolygon_part.reference'));
+             _rdrawn.insert(bbox);
            }
-         }
 
-         var validation = function checkMismatchedGeometry(entity, graph) {
-           var issues = [vertexTaggedAsPointIssue(entity, graph), lineTaggedAsAreaIssue(entity)];
-           issues = issues.concat(unclosedMultipolygonPartIssues(entity, graph));
-           return issues.filter(Boolean);
-         };
+           function tryInsert(bboxes, id, saveSkipped) {
+             var skipped = false;
 
-         validation.type = type;
-         return validation;
-       }
+             for (var i = 0; i < bboxes.length; i++) {
+               var bbox = bboxes[i];
+               bbox.id = id; // Check that label is visible
 
-       function validationMissingRole() {
-         var type = 'missing_role';
+               if (bbox.minX < 0 || bbox.minY < 0 || bbox.maxX > dimensions[0] || bbox.maxY > dimensions[1]) {
+                 skipped = true;
+                 break;
+               }
 
-         var validation = function checkMissingRole(entity, graph) {
-           var issues = [];
+               if (_rdrawn.collides(bbox)) {
+                 skipped = true;
+                 break;
+               }
+             }
 
-           if (entity.type === 'way') {
-             graph.parentRelations(entity).forEach(function (relation) {
-               if (!relation.isMultipolygon()) return;
-               var member = relation.memberById(entity.id);
+             _entitybboxes[id] = bboxes;
 
-               if (member && isMissingRole(member)) {
-                 issues.push(makeIssue(entity, relation, member));
+             if (skipped) {
+               if (saveSkipped) {
+                 _rskipped.load(bboxes);
                }
-             });
-           } else if (entity.type === 'relation' && entity.isMultipolygon()) {
-             entity.indexedMembers().forEach(function (member) {
-               var way = graph.hasEntity(member.id);
+             } else {
+               _rdrawn.load(bboxes);
+             }
 
-               if (way && isMissingRole(member)) {
-                 issues.push(makeIssue(way, entity, member));
-               }
-             });
+             return !skipped;
            }
 
-           return issues;
-         };
+           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 isMissingRole(member) {
-           return !member.role || !member.role.trim().length;
-         }
+           drawPointLabels(label, labelled.point, filter, 'pointlabel', positions.point);
+           drawPointLabels(halo, labelled.point, filter, 'pointlabel-halo', positions.point); // lines
 
-         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
-                   }));
-                 }
-               })];
-             }
-           });
+           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 showReference(selection) {
-             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.missing_role.multipolygon.reference'));
-           }
-         }
+           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
 
-         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
-               }));
-             }
-           });
+           drawCollisionBoxes(debug, _rskipped, 'debug-skipped');
+           drawCollisionBoxes(debug, _rdrawn, 'debug-drawn');
+           layer.call(filterLabels);
          }
 
-         validation.type = type;
-         return validation;
-       }
+         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
 
-       function validationMissingTag(context) {
-         var type = 'missing_tag';
+           if (mouse) {
+             pad = 20;
+             bbox = {
+               minX: mouse[0] - pad,
+               minY: mouse[1] - pad,
+               maxX: mouse[0] + pad,
+               maxY: mouse[1] + pad
+             };
 
-         function hasDescriptiveTags(entity, graph) {
-           var keys = Object.keys(entity.tags).filter(function (k) {
-             if (k === 'area' || k === 'name') {
-               return false;
-             } else {
-               return osmIsInterestingTag(k);
+             var nearMouse = _rdrawn.search(bbox).map(function (entity) {
+               return entity.id;
+             });
+
+             ids.push.apply(ids, nearMouse);
+           } // hide labels on selected nodes (they look weird when dragging / haloed)
+
+
+           for (var i = 0; i < selectedIDs.length; i++) {
+             var entity = graph.hasEntity(selectedIDs[i]);
+
+             if (entity && entity.type === 'node') {
+               ids.push(selectedIDs[i]);
              }
-           });
+           }
 
-           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);
+           layers.selectAll(utilEntitySelector(ids)).classed('nolabel', true); // draw the mouse bbox if debugging is on..
+
+           var debug = selection.selectAll('.labels-group.debug');
+           var gj = [];
+
+           if (context.getDebug('collision')) {
+             gj = bbox ? [{
+               type: 'Polygon',
+               coordinates: [[[bbox.minX, bbox.minY], [bbox.maxX, bbox.minY], [bbox.maxX, bbox.maxY], [bbox.minX, bbox.maxY], [bbox.minX, bbox.minY]]]
+             }] : [];
            }
 
-           return keys.length > 0;
-         }
+           var box = debug.selectAll('.debug-mouse').data(gj); // exit
 
-         function isUnknownRoad(entity) {
-           return entity.type === 'way' && entity.tags.highway === 'road';
-         }
+           box.exit().remove(); // enter/update
 
-         function isUntypedRelation(entity) {
-           return entity.type === 'relation' && !entity.tags.type;
+           box.enter().append('path').attr('class', 'debug debug-mouse yellow').merge(box).attr('d', d3_geoPath());
          }
 
-         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
+         var throttleFilterLabels = throttle(filterLabels, 100);
 
-           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
+         drawLabels.observe = function (selection) {
+           var listener = function listener() {
+             throttleFilterLabels(selection);
+           };
 
+           selection.on('mousemove.hidelabels', listener);
+           context.on('enter.hidelabels', listener);
+         };
 
-           if (!subtype && isUnknownRoad(entity)) {
-             subtype = 'highway_classification';
-           }
+         drawLabels.off = function (selection) {
+           throttleFilterLabels.cancel();
+           selection.on('mousemove.hidelabels', null);
+           context.on('enter.hidelabels', null);
+         };
 
-           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..
+         return drawLabels;
+       }
 
-           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();
+       var _layerEnabled$1 = false;
 
-               if (!disabledReasonID) {
-                 deleteOnClick = function deleteOnClick(context) {
-                   var id = this.issue.entityIds[0];
-                   var operation = operationDelete(context, [id]);
+       var _qaService$1;
 
-                   if (!operation.disabled()) {
-                     operation();
-                   }
-                 };
-               }
+       function svgImproveOSM(projection, context, dispatch) {
+         var throttledRedraw = throttle(function () {
+           return dispatch.call('change');
+         }, 1000);
 
-               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;
-             }
-           })];
+         var minZoom = 12;
+         var touchLayer = select(null);
+         var drawLayer = select(null);
+         var layerVisible = false;
 
-           function showReference(selection) {
-             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.' + referenceID + '.reference'));
-           }
-         };
+         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
 
-         validation.type = type;
-         return validation;
-       }
 
-       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());
-       };
+         function getService() {
+           if (services.improveOSM && !_qaService$1) {
+             _qaService$1 = services.improveOSM;
 
-       // {
-       //   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"
-       // }
+             _qaService$1.on('loaded', throttledRedraw);
+           } else if (!services.improveOSM && _qaService$1) {
+             _qaService$1 = null;
+           }
 
-       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;
-       };
+           return _qaService$1;
+         } // Show the markers
 
-       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 editOn() {
+           if (!layerVisible) {
+             layerVisible = true;
+             drawLayer.style('display', 'block');
+           }
+         } // Immediately remove the markers and their touch targets
+
 
-       var matcher$1 = function matcher() {
-         var _warnings = []; // array of match conflict pairs
+         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.
 
-         var _ambiguous = {};
-         var _matchIndex = {};
-         var matcher = {}; // Create an index of all the keys/simplenames for fast matching
 
-         matcher.buildMatchIndex = function (brands) {
-           // two passes - once for primary names, once for secondary/alternate names
-           Object.keys(brands).forEach(function (kvnd) {
-             return insertNames(kvnd, 'primary');
-           });
-           Object.keys(brands).forEach(function (kvnd) {
-             return insertNames(kvnd, 'secondary');
+         function 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 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.
+         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 (which === 'secondary' && parts.d) return;
 
-             if (obj.countryCodes) {
-               parts.countryCodes = obj.countryCodes.slice(); // copy
-             }
+         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..
 
-             var nomatches = obj.nomatch || [];
+           var markers = drawLayer.selectAll('.qaItem.improveOSM').data(data, function (d) {
+             return d.id;
+           }); // exit
 
-             if (nomatches.some(function (s) {
-               return s === kvnd;
-             })) {
-               console.log("WARNING match/nomatch conflict for ".concat(kvnd));
-               return;
-             }
+           markers.exit().remove(); // enter
 
-             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();
-             });
-             var match_nsimple = [];
+           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 (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);
+             if (!picon) {
+               return '';
+             } else {
+               var isMaki = /^maki-/.test(picon);
+               return "#".concat(picon).concat(isMaki ? '-11' : '');
              }
+           }); // update
 
-             if (!match_nsimple.length) return; // nothing to do
-
-             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
-                   }
-                 }
-               });
-             });
-           }
-         }; // pass a `key`, `value`, `name` and return the best match,
-         // `countryCode` optional (if supplied, must match that too)
+           markers.merge(markersEnter).sort(sortY).classed('selected', function (d) {
+             return d.id === selectedID;
+           }).attr('transform', getTransform); // Draw targets..
 
+           if (touchLayer.empty()) return;
+           var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+           var targets = touchLayer.selectAll('.qaItem.improveOSM').data(data, function (d) {
+             return d.id;
+           }); // exit
 
-         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)
+           targets.exit().remove(); // enter/update
 
+           targets.enter().append('rect').attr('width', '20px').attr('height', '30px').attr('x', '-10px').attr('y', '-28px').merge(targets).sort(sortY).attr('class', function (d) {
+             return "qaItem ".concat(d.service, " target ").concat(fillClass, " itemId-").concat(d.id);
+           }).attr('transform', getTransform);
 
-         matcher.matchParts = function (parts, countryCode) {
-           var match = null;
-           var inGroup = false; // fixme: we currently return a single match for ambiguous
+           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.
 
-           match = _ambiguous[parts.kv] && _ambiguous[parts.kv][parts.nsimple];
-           if (match && matchesCountryCode(match)) return match; // try to return an exact match
 
-           match = _matchIndex[parts.kv] && _matchIndex[parts.kv][parts.nsimple];
-           if (match && matchesCountryCode(match)) return match; // look in match groups
+         function drawImproveOSM(selection) {
+           var service = getService();
+           var surface = context.surface();
 
-           for (var mg in matchGroups$1) {
-             var matchGroup = matchGroups$1[mg];
-             match = null;
-             inGroup = false;
+           if (surface && !surface.empty()) {
+             touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
+           }
 
-             for (var i = 0; i < matchGroup.length; i++) {
-               var otherkv = matchGroup[i].toLowerCase();
+           drawLayer = selection.selectAll('.layer-improveOSM').data(service ? [0] : []);
+           drawLayer.exit().remove();
+           drawLayer = drawLayer.enter().append('g').attr('class', 'layer-improveOSM').style('display', _layerEnabled$1 ? 'block' : 'none').merge(drawLayer);
 
-               if (!inGroup) {
-                 inGroup = otherkv === parts.kv;
-               }
+           if (_layerEnabled$1) {
+             if (service && ~~context.map().zoom() >= minZoom) {
+               editOn();
+               service.loadIssues(projection);
+               updateMarkers();
+             } else {
+               editOff();
+             }
+           }
+         } // Toggles the layer on and off
 
-               if (!match) {
-                 // fixme: we currently return a single match for ambiguous
-                 match = _ambiguous[otherkv] && _ambiguous[otherkv][parts.nsimple];
-               }
 
-               if (!match) {
-                 match = _matchIndex[otherkv] && _matchIndex[otherkv][parts.nsimple];
-               }
+         drawImproveOSM.enabled = function (val) {
+           if (!arguments.length) return _layerEnabled$1;
+           _layerEnabled$1 = val;
 
-               if (match && !matchesCountryCode(match)) {
-                 match = null;
-               }
+           if (_layerEnabled$1) {
+             layerOn();
+           } else {
+             layerOff();
 
-               if (inGroup && match) {
-                 return match;
-               }
+             if (context.selectedErrorID()) {
+               context.enter(modeBrowse(context));
              }
            }
 
-           return null;
-
-           function matchesCountryCode(match) {
-             if (!countryCode) return true;
-             if (!match.countryCodes) return true;
-             return match.countryCodes.indexOf(countryCode) !== -1;
-           }
+           dispatch.call('change');
+           return this;
          };
 
-         matcher.getWarnings = function () {
-           return _warnings;
+         drawImproveOSM.supported = function () {
+           return !!getService();
          };
 
-         return matcher;
-       };
+         return drawImproveOSM;
+       }
 
-       var fromCharCode = String.fromCharCode;
-       var nativeFromCodePoint = String.fromCodePoint;
+       var _layerEnabled = false;
 
-       // length should be 1, old FF problem
-       var INCORRECT_LENGTH = !!nativeFromCodePoint && nativeFromCodePoint.length != 1;
+       var _qaService;
 
-       // `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('');
-         }
-       });
+       function svgOsmose(projection, context, dispatch) {
+         var throttledRedraw = throttle(function () {
+           return dispatch.call('change');
+         }, 1000);
 
-       var quickselect$2 = createCommonjsModule(function (module, exports) {
-         (function (global, factory) {
-            module.exports = factory() ;
-         })(commonjsGlobal, function () {
+         var minZoom = 12;
+         var touchLayer = select(null);
+         var drawLayer = select(null);
+         var layerVisible = false;
 
-           function quickselect(arr, k, left, right, compare) {
-             quickselectStep(arr, k, left || 0, right || arr.length - 1, compare || defaultCompare);
-           }
+         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 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);
+         function getService() {
+           if (services.osmose && !_qaService) {
+             _qaService = services.osmose;
 
-               while (i < j) {
-                 swap(arr, i, j);
-                 i++;
-                 j--;
+             _qaService.on('loaded', throttledRedraw);
+           } else if (!services.osmose && _qaService) {
+             _qaService = null;
+           }
 
-                 while (compare(arr[i], t) < 0) {
-                   i++;
-                 }
+           return _qaService;
+         } // Show the markers
 
-                 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 editOn() {
+           if (!layerVisible) {
+             layerVisible = true;
+             drawLayer.style('display', 'block');
            }
+         } // Immediately remove the markers and their touch targets
 
-           function swap(arr, i, j) {
-             var tmp = arr[i];
-             arr[i] = arr[j];
-             arr[j] = tmp;
-           }
 
-           function defaultCompare(a, b) {
-             return a < b ? -1 : a > b ? 1 : 0;
+         function 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 quickselect;
-         });
-       });
 
-       var rbush_1 = rbush;
-       var _default$2 = rbush;
+         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 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
 
-         this._maxEntries = Math.max(4, maxEntries || 9);
-         this._minEntries = Math.max(2, Math.ceil(this._maxEntries * 0.4));
+         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 (format) {
-           this._initFormat(format);
-         }
 
-         this.clear();
-       }
+         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..
 
-       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;
+           var markers = drawLayer.selectAll('.qaItem.osmose').data(data, function (d) {
+             return d.id;
+           }); // exit
 
-           while (node) {
-             for (i = 0, len = node.children.length; i < len; i++) {
-               child = node.children[i];
-               childBBox = node.leaf ? toBBox(child) : child;
+           markers.exit().remove(); // enter
 
-               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);
-               }
+           var markersEnter = markers.enter().append('g').attr('class', function (d) {
+             return "qaItem ".concat(d.service, " itemId-").concat(d.id, " itemType-").concat(d.itemType);
+           });
+           markersEnter.append('polygon').call(markerPath, 'shadow');
+           markersEnter.append('ellipse').attr('cx', 0).attr('cy', 0).attr('rx', 4.5).attr('ry', 2).attr('class', 'stroke');
+           markersEnter.append('polygon').attr('fill', function (d) {
+             return service.getColor(d.item);
+           }).call(markerPath, 'qaItem-fill');
+           markersEnter.append('use').attr('transform', 'translate(-6.5, -23)').attr('class', 'icon-annotation').attr('width', '13px').attr('height', '13px').attr('xlink:href', function (d) {
+             var picon = d.icon;
+
+             if (!picon) {
+               return '';
+             } else {
+               var isMaki = /^maki-/.test(picon);
+               return "#".concat(picon).concat(isMaki ? '-11' : '');
              }
+           }); // update
 
-             node = nodesToSearch.pop();
-           }
+           markers.merge(markersEnter).sort(sortY).classed('selected', function (d) {
+             return d.id === selectedID;
+           }).attr('transform', getTransform); // Draw targets..
 
-           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;
+           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
 
-           while (node) {
-             for (i = 0, len = node.children.length; i < len; i++) {
-               child = node.children[i];
-               childBBox = node.leaf ? toBBox(child) : child;
+           targets.exit().remove(); // enter/update
 
-               if (intersects$1(bbox, childBBox)) {
-                 if (node.leaf || contains$1(bbox, childBBox)) return true;
-                 nodesToSearch.push(child);
-               }
-             }
+           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);
 
-             node = nodesToSearch.pop();
+           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.
 
-           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]);
-             }
+         function drawOsmose(selection) {
+           var service = getService();
+           var surface = context.surface();
 
-             return this;
-           } // recursively build the tree with the given data from scratch using OMT algorithm
+           if (surface && !surface.empty()) {
+             touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
+           }
 
+           drawLayer = selection.selectAll('.layer-osmose').data(service ? [0] : []);
+           drawLayer.exit().remove();
+           drawLayer = drawLayer.enter().append('g').attr('class', 'layer-osmose').style('display', _layerEnabled ? 'block' : 'none').merge(drawLayer);
 
-           var node = this._build(data.slice(), 0, data.length - 1, 0);
+           if (_layerEnabled) {
+             if (service && ~~context.map().zoom() >= minZoom) {
+               editOn();
+               service.loadIssues(projection);
+               updateMarkers();
+             } else {
+               editOff();
+             }
+           }
+         } // Toggles the layer on and off
 
-           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);
+
+         drawOsmose.enabled = function (val) {
+           if (!arguments.length) return _layerEnabled;
+           _layerEnabled = val;
+
+           if (_layerEnabled) {
+             // Strings supplied by Osmose fetched before showing layer for first time
+             // NOTE: Currently no way to change locale in iD at runtime, would need to re-call this method if that's ever implemented
+             // Also, If layer is toggled quickly multiple requests are sent
+             getService().loadStrings().then(layerOn)["catch"](function (err) {
+               console.log(err); // eslint-disable-line no-console
+             });
            } 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
-
+             layerOff();
 
-             this._insert(node, this.data.height - node.height - 1, true);
+             if (context.selectedErrorID()) {
+               context.enter(modeBrowse(context));
+             }
            }
 
+           dispatch.call('change');
            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;
-             }
+         drawOsmose.supported = function () {
+           return !!getService();
+         };
 
-             if (node.leaf) {
-               // check current node
-               index = findItem$1(item, node.children, equalsFn);
+         return drawOsmose;
+       }
 
-               if (index !== -1) {
-                 // item found, remove the item and condense tree upwards
-                 node.children.splice(index, 1);
-                 path.push(node);
+       function svgStreetside(projection, context, dispatch) {
+         var throttledRedraw = throttle(function () {
+           dispatch.call('change');
+         }, 1000);
 
-                 this._condense(path);
+         var minZoom = 14;
+         var minMarkerZoom = 16;
+         var minViewfieldZoom = 18;
+         var layer = select(null);
+         var _viewerYaw = 0;
+         var _selectedSequence = null;
 
-                 return this;
-               }
-             }
+         var _streetside;
+         /**
+          * init().
+          */
 
-             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
 
-           }
+         function init() {
+           if (svgStreetside.initialized) return; // run once
 
-           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 = [];
+           svgStreetside.enabled = false;
+           svgStreetside.initialized = true;
+         }
+         /**
+          * getService().
+          */
 
-           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;
+         function getService() {
+           if (services.streetside && !_streetside) {
+             _streetside = services.streetside;
 
-           if (N <= M) {
-             // reached leaf level; return leaf
-             node = createNode$1(items.slice(left, right + 1));
-             calcBBox$1(node, this.toBBox);
-             return node;
+             _streetside.event.on('viewerChanged.svgStreetside', viewerChanged).on('loadedImages.svgStreetside', throttledRedraw);
+           } else if (!services.streetside && _streetside) {
+             _streetside = null;
            }
 
-           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 _streetside;
+         }
+         /**
+          * showLayer().
+          */
 
-             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
+         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().
+          */
 
-           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);
+         function hideLayer() {
+           throttledRedraw.cancel();
+           layer.transition().duration(250).style('opacity', 0).on('end', editOff);
+         }
+         /**
+          * editOn().
+          */
 
-             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));
-             }
-           }
+         function editOn() {
+           layer.style('display', 'block');
+         }
+         /**
+          * editOff().
+          */
 
-           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;
+         function editOff() {
+           layer.selectAll('.viewfield-group').remove();
+           layer.style('display', 'none');
+         }
+         /**
+          * click() Handles 'bubble' point click event.
+          */
 
-             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;
-                 }
-               }
-             }
+         function click(d3_event, d) {
+           var service = getService();
+           if (!service) return; // try to preserve the viewer rotation when staying on the same sequence
 
-             node = targetNode || node.children[0];
+           if (d.sequenceKey !== _selectedSequence) {
+             _viewerYaw = 0; // reset
            }
 
-           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
+           _selectedSequence = d.sequenceKey;
+           service.ensureViewerLoaded(context).then(function () {
+             service.selectImage(context, d.key).yaw(_viewerYaw).showViewer(context);
+           });
+           context.map().centerEase(d.loc);
+         }
+         /**
+          * mouseover().
+          */
 
-           var node = this._chooseSubtree(bbox, this.data, level, insertPath); // put the item into the node
 
+         function mouseover(d3_event, d) {
+           var service = getService();
+           if (service) service.setStyles(context, d);
+         }
+         /**
+          * mouseout().
+          */
 
-           node.children.push(item);
-           extend$3(node, bbox); // split on node overflow; propagate upwards if necessary
 
-           while (level >= 0) {
-             if (insertPath[level].children.length > this._maxEntries) {
-               this._split(insertPath, level);
+         function mouseout() {
+           var service = getService();
+           if (service) service.setStyles(context, null);
+         }
+         /**
+          * transform().
+          */
 
-               level--;
-             } else break;
-           } // adjust bboxes along the insertion path
 
+         function transform(d) {
+           var t = svgPointTransform(projection)(d);
+           var rot = d.ca + _viewerYaw;
 
-           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;
+           if (rot) {
+             t += ' rotate(' + Math.floor(rot) + ',0,0)';
+           }
 
-           this._chooseSplitAxis(node, m, M);
+           return t;
+         }
 
-           var splitIndex = this._chooseSplitIndex(node, m, M);
+         function viewerChanged() {
+           var service = getService();
+           if (!service) return;
+           var viewer = service.viewer();
+           if (!viewer) return; // update viewfield rotation
 
-           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;
+           _viewerYaw = viewer.getYaw(); // avoid updating if the map is currently transformed
+           // e.g. during drags or easing.
 
-           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 (context.map().isTransformed()) return;
+           layer.selectAll('.viewfield-group.currentView').attr('transform', transform);
+         }
 
-             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;
-               }
-             }
+         function filterBubbles(bubbles) {
+           var fromDate = context.photos().fromDate();
+           var toDate = context.photos().toDate();
+           var usernames = context.photos().usernames();
+
+           if (fromDate) {
+             var fromTimestamp = new Date(fromDate).getTime();
+             bubbles = bubbles.filter(function (bubble) {
+               return new Date(bubble.captured_at).getTime() >= fromTimestamp;
+             });
            }
 
-           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 (toDate) {
+             var toTimestamp = new Date(toDate).getTime();
+             bubbles = bubbles.filter(function (bubble) {
+               return new Date(bubble.captured_at).getTime() <= toTimestamp;
+             });
+           }
 
+           if (usernames) {
+             bubbles = bubbles.filter(function (bubble) {
+               return usernames.indexOf(bubble.captured_by) !== -1;
+             });
+           }
 
-           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;
+           return bubbles;
+         }
 
-           for (i = m; i < M - m; i++) {
-             child = node.children[i];
-             extend$3(leftBBox, node.leaf ? toBBox(child) : child);
-             margin += bboxMargin$1(leftBBox);
-           }
+         function filterSequences(sequences) {
+           var fromDate = context.photos().fromDate();
+           var toDate = context.photos().toDate();
+           var usernames = context.photos().usernames();
 
-           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 (fromDate) {
+             var fromTimestamp = new Date(fromDate).getTime();
+             sequences = sequences.filter(function (sequences) {
+               return new Date(sequences.properties.captured_at).getTime() >= fromTimestamp;
+             });
            }
 
-           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);
+           if (toDate) {
+             var toTimestamp = new Date(toDate).getTime();
+             sequences = sequences.filter(function (sequences) {
+               return new Date(sequences.properties.captured_at).getTime() <= toTimestamp;
+             });
            }
-         },
-         _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);
+
+           if (usernames) {
+             sequences = sequences.filter(function (sequences) {
+               return usernames.indexOf(sequences.properties.captured_by) !== -1;
+             });
            }
-         },
-         _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 sequences;
          }
-       };
+         /**
+          * update().
+          */
 
-       function findItem$1(item, items, equalsFn) {
-         if (!equalsFn) return items.indexOf(item);
 
-         for (var i = 0; i < items.length; i++) {
-           if (equalsFn(item, items[i])) return i;
-         }
+         function 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 = [];
 
-         return -1;
-       } // calculate node's bbox from bboxes of its children
+           if (context.photos().showsPanoramic()) {
+             sequences = service ? service.sequences(projection) : [];
+             bubbles = service && showMarkers ? service.bubbles(projection) : [];
+             sequences = filterSequences(sequences);
+             bubbles = filterBubbles(bubbles);
+           }
+
+           var traces = layer.selectAll('.sequences').selectAll('.sequence').data(sequences, function (d) {
+             return d.properties.key;
+           }); // exit
 
+           traces.exit().remove(); // enter/update
 
-       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
+           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
 
+           groups.exit().remove(); // enter
 
-       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;
+           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
 
-         for (var i = k, child; i < p; i++) {
-           child = node.children[i];
-           extend$3(destNode, node.leaf ? toBBox(child) : child);
+           var markers = groups.merge(groupsEnter).sort(function (a, b) {
+             return a === selected ? 1 : b === selected ? -1 : b.loc[1] - a.loc[1];
+           }).attr('transform', transform).select('.viewfield-scale');
+           markers.selectAll('circle').data([0]).enter().append('circle').attr('dx', '0').attr('dy', '0').attr('r', '6');
+           var viewfields = markers.selectAll('.viewfield').data(showViewfields ? [0] : []);
+           viewfields.exit().remove(); // viewfields may or may not be drawn...
+           // but if they are, draw below the circles
+
+           viewfields.enter().insert('path', 'circle').attr('class', 'viewfield').attr('transform', 'scale(1.5,1.5),translate(-8, -13)').attr('d', viewfieldPath);
+
+           function viewfieldPath() {
+             var d = this.parentNode.__data__;
+
+             if (d.pano) {
+               return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
+             } else {
+               return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
+             }
+           }
          }
+         /**
+          * drawImages()
+          * drawImages is the method that is returned (and that runs) every time 'svgStreetside()' is called.
+          * 'svgStreetside()' is called from index.js
+          */
 
-         return destNode;
-       }
 
-       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 drawImages(selection) {
+           var enabled = svgStreetside.enabled;
+           var service = getService();
+           layer = selection.selectAll('.layer-streetside-images').data(service ? [0] : []);
+           layer.exit().remove();
+           var layerEnter = layer.enter().append('g').attr('class', 'layer-streetside-images').style('display', enabled ? 'block' : 'none');
+           layerEnter.append('g').attr('class', 'sequences');
+           layerEnter.append('g').attr('class', 'markers');
+           layer = layerEnter.merge(layer);
+
+           if (enabled) {
+             if (service && ~~context.map().zoom() >= minZoom) {
+               editOn();
+               update();
+               service.loadBubbles(projection);
+             } else {
+               editOff();
+             }
+           }
+         }
+         /**
+          * drawImages.enabled().
+          */
 
-       function compareNodeMinX$1(a, b) {
-         return a.minX - b.minX;
-       }
 
-       function compareNodeMinY$1(a, b) {
-         return a.minY - b.minY;
-       }
+         drawImages.enabled = function (_) {
+           if (!arguments.length) return svgStreetside.enabled;
+           svgStreetside.enabled = _;
 
-       function bboxArea$1(a) {
-         return (a.maxX - a.minX) * (a.maxY - a.minY);
-       }
+           if (svgStreetside.enabled) {
+             showLayer();
+             context.photos().on('change.streetside', update);
+           } else {
+             hideLayer();
+             context.photos().on('change.streetside', null);
+           }
 
-       function bboxMargin$1(a) {
-         return a.maxX - a.minX + (a.maxY - a.minY);
-       }
+           dispatch.call('change');
+           return this;
+         };
+         /**
+          * drawImages.supported().
+          */
 
-       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);
-       }
+         drawImages.supported = function () {
+           return !!getService();
+         };
 
-       function contains$1(a, b) {
-         return a.minX <= b.minX && a.minY <= b.minY && b.maxX <= a.maxX && b.maxY <= a.maxY;
+         init();
+         return drawImages;
        }
 
-       function intersects$1(a, b) {
-         return b.minX <= a.maxX && b.minY <= a.maxY && b.maxX >= a.minX && b.maxY >= a.minY;
-       }
+       function svgMapillaryImages(projection, context, dispatch) {
+         var throttledRedraw = throttle(function () {
+           dispatch.call('change');
+         }, 1000);
 
-       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
+         var minZoom = 12;
+         var minMarkerZoom = 16;
+         var minViewfieldZoom = 18;
+         var layer = select(null);
 
+         var _mapillary;
 
-       function multiSelect$1(arr, left, right, n, compare) {
-         var stack = [left, right],
-             mid;
+         function init() {
+           if (svgMapillaryImages.initialized) return; // run once
 
-         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);
+           svgMapillaryImages.enabled = false;
+           svgMapillaryImages.initialized = true;
          }
-       }
-       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 getService() {
+           if (services.mapillary && !_mapillary) {
+             _mapillary = services.mapillary;
 
-       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 = [];
+             _mapillary.event.on('loadedImages', throttledRedraw);
+           } else if (!services.mapillary && _mapillary) {
+             _mapillary = null;
+           }
 
-         for (i = 1; i < len; i++) {
-           a = points[i - 1];
-           b = points[i];
-           codeB = lastCode = bitCode$1(b, bbox);
+           return _mapillary;
+         }
 
-           while (true) {
-             if (!(codeA | codeB)) {
-               // accept
-               part.push(a);
+         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 (codeB !== lastCode) {
-                 // segment went outside
-                 part.push(b);
+         function hideLayer() {
+           throttledRedraw.cancel();
+           layer.transition().duration(250).style('opacity', 0).on('end', editOff);
+         }
 
-                 if (i < len - 1) {
-                   // start a new line
-                   result.push(part);
-                   part = [];
-                 }
-               } else if (i === len - 1) {
-                 part.push(b);
-               }
+         function editOn() {
+           layer.style('display', 'block');
+         }
 
-               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);
-             }
-           }
+         function editOff() {
+           layer.selectAll('.viewfield-group').remove();
+           layer.style('display', 'none');
+         }
 
-           codeA = lastCode;
+         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);
          }
 
-         if (part.length) result.push(part);
-         return result;
-       } // Sutherland-Hodgeman polygon clipping algorithm
+         function mouseover(d3_event, image) {
+           var service = getService();
+           if (service) service.setStyles(context, image);
+         }
 
+         function mouseout() {
+           var service = getService();
+           if (service) service.setStyles(context, null);
+         }
 
-       function polygonclip$1(points, bbox) {
-         var result, edge, prev, prevInside, i, p, inside; // clip against each side of the clip rectangle
+         function transform(d) {
+           var t = svgPointTransform(projection)(d);
 
-         for (edge = 1; edge <= 8; edge *= 2) {
-           result = [];
-           prev = points[points.length - 1];
-           prevInside = !(bitCode$1(prev, bbox) & edge);
+           if (d.ca) {
+             t += ' rotate(' + Math.floor(d.ca) + ',0,0)';
+           }
 
-           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
+           return t;
+         }
 
-             if (inside !== prevInside) result.push(intersect$1(prev, p, edge, bbox));
-             if (inside) result.push(p); // add a point if it's inside
+         function filterImages(images) {
+           var showsPano = context.photos().showsPanoramic();
+           var showsFlat = context.photos().showsFlat();
+           var fromDate = context.photos().fromDate();
+           var toDate = context.photos().toDate();
 
-             prev = p;
-             prevInside = inside;
+           if (!showsPano || !showsFlat) {
+             images = images.filter(function (image) {
+               if (image.is_pano) return showsPano;
+               return showsFlat;
+             });
            }
 
-           points = result;
-           if (!points.length) break;
+           if (fromDate) {
+             images = images.filter(function (image) {
+               return new Date(image.captured_at).getTime() >= new Date(fromDate).getTime();
+             });
+           }
+
+           if (toDate) {
+             images = images.filter(function (image) {
+               return new Date(image.captured_at).getTime() <= new Date(toDate).getTime();
+             });
+           }
+
+           return images;
          }
 
-         return result;
-       } // intersect a segment against one of the 4 lines that make up the bbox
+         function filterSequences(sequences) {
+           var showsPano = context.photos().showsPanoramic();
+           var showsFlat = context.photos().showsFlat();
+           var fromDate = context.photos().fromDate();
+           var toDate = context.photos().toDate();
 
+           if (!showsPano || !showsFlat) {
+             sequences = sequences.filter(function (sequence) {
+               if (sequence.properties.hasOwnProperty('is_pano')) {
+                 if (sequence.properties.is_pano) return showsPano;
+                 return showsFlat;
+               }
 
-       function 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
+               return false;
+             });
+           }
 
+           if (fromDate) {
+             sequences = sequences.filter(function (sequence) {
+               return new Date(sequence.properties.captured_at).getTime() >= new Date(fromDate).getTime().toString();
+             });
+           }
 
-       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 (toDate) {
+             sequences = sequences.filter(function (sequence) {
+               return new Date(sequence.properties.captured_at).getTime() <= new Date(toDate).getTime().toString();
+             });
+           }
 
-         if (p[1] < bbox[1]) code |= 4; // bottom
-         else if (p[1] > bbox[3]) code |= 8; // top
+           return sequences;
+         }
 
-         return code;
-       }
+         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
 
-       var whichPolygon_1 = whichPolygon;
+           traces.exit().remove(); // enter/update
 
-       function whichPolygon(data) {
-         var bboxes = [];
+           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 (var i = 0; i < data.features.length; i++) {
-           var feature = data.features[i];
-           var coords = feature.geometry.coordinates;
+           groups.exit().remove(); // enter
 
-           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 groupsEnter = groups.enter().append('g').attr('class', 'viewfield-group').on('mouseenter', mouseover).on('mouseleave', mouseout).on('click', click);
+           groupsEnter.append('g').attr('class', 'viewfield-scale'); // update
+
+           var markers = groups.merge(groupsEnter).sort(function (a, b) {
+             return b.loc[1] - a.loc[1]; // sort Y
+           }).attr('transform', transform).select('.viewfield-scale');
+           markers.selectAll('circle').data([0]).enter().append('circle').attr('dx', '0').attr('dy', '0').attr('r', '6');
+           var viewfields = markers.selectAll('.viewfield').data(showViewfields ? [0] : []);
+           viewfields.exit().remove();
+           viewfields.enter() // viewfields may or may not be drawn...
+           .insert('path', 'circle') // but if they are, draw below the circles
+           .attr('class', 'viewfield').classed('pano', function () {
+             return this.parentNode.__data__.is_pano;
+           }).attr('transform', 'scale(1.5,1.5),translate(-8, -13)').attr('d', viewfieldPath);
+
+           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';
              }
            }
          }
 
-         var tree = rbush_1().load(bboxes);
-
-         function query(p, multi) {
-           var output = [],
-               result = tree.search({
-             minX: p[0],
-             minY: p[1],
-             maxX: p[0],
-             maxY: p[1]
-           });
+         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);
 
-           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 (enabled) {
+             if (service && ~~context.map().zoom() >= minZoom) {
+               editOn();
+               update();
+               service.loadImages(projection);
+             } else {
+               editOff();
              }
            }
-
-           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]
-           });
+         drawImages.enabled = function (_) {
+           if (!arguments.length) return svgMapillaryImages.enabled;
+           svgMapillaryImages.enabled = _;
 
-           for (var i = 0; i < result.length; i++) {
-             if (polygonIntersectsBBox(result[i].coords, bbox)) {
-               output.push(result[i].props);
-             }
+           if (svgMapillaryImages.enabled) {
+             showLayer();
+             context.photos().on('change.mapillary_images', update);
+           } else {
+             hideLayer();
+             context.photos().on('change.mapillary_images', null);
            }
 
-           return output;
+           dispatch.call('change');
+           return this;
          };
 
-         return query;
-       }
+         drawImages.supported = function () {
+           return !!getService();
+         };
 
-       function polygonIntersectsBBox(polygon, bbox) {
-         var bboxCenter = [(bbox[0] + bbox[2]) / 2, (bbox[1] + bbox[3]) / 2];
-         if (insidePolygon(polygon, bboxCenter)) return true;
+         init();
+         return drawImages;
+       }
 
-         for (var i = 0; i < polygon.length; i++) {
-           if (lineclip_1$1(polygon[i], bbox).length > 0) return true;
-         }
+       function svgMapillaryPosition(projection, context) {
+         var throttledRedraw = throttle(function () {
+           update();
+         }, 1000);
 
-         return false;
-       } // ray casting algorithm for detecting if point is in polygon
+         var minZoom = 12;
+         var minViewfieldZoom = 18;
+         var layer = select(null);
 
+         var _mapillary;
 
-       function insidePolygon(rings, p) {
-         var inside = false;
+         var viewerCompassAngle;
 
-         for (var i = 0, len = rings.length; i < len; i++) {
-           var ring = rings[i];
+         function init() {
+           if (svgMapillaryPosition.initialized) return; // run once
 
-           for (var j = 0, len2 = ring.length, k = len2 - 1; j < len2; k = j++) {
-             if (rayIntersect(p, ring[j], ring[k])) inside = !inside;
-           }
+           svgMapillaryPosition.initialized = true;
          }
 
-         return inside;
-       }
+         function getService() {
+           if (services.mapillary && !_mapillary) {
+             _mapillary = services.mapillary;
 
-       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];
-       }
+             _mapillary.event.on('imageChanged', throttledRedraw);
 
-       function treeItem(coords, props) {
-         var item = {
-           minX: Infinity,
-           minY: Infinity,
-           maxX: -Infinity,
-           maxY: -Infinity,
-           coords: coords,
-           props: props
-         };
+             _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;
+           }
 
-         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 _mapillary;
          }
 
-         return item;
-       }
+         function editOn() {
+           layer.style('display', 'block');
+         }
 
-       var type = "FeatureCollection";
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-       var rawBorders = {
-       type: type,
-       features: features
-       };
+         function editOff() {
+           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 transform(d) {
+           var t = svgPointTransform(projection)(d);
 
-       function loadDerivedDataAndCaches(borders) {
-         var identifierProps = ['iso1A2', 'iso1A3', 'm49', 'wikidata', 'emojiFlag', 'nameEn'];
-         var geometryFeatures = [];
+           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)';
+           }
 
-         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);
+           return t;
          }
 
-         for (var _i in borders.features) {
-           var _feature2 = borders.features[_i];
+         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
 
-           _feature2.properties.groups.sort(function (groupID1, groupID2) {
-             return levels.indexOf(featuresByCode[groupID1].properties.level) - levels.indexOf(featuresByCode[groupID2].properties.level);
-           });
+           groups.exit().remove(); // enter
 
-           loadMembersForGroupsOf(_feature2);
-         }
+           var groupsEnter = groups.enter().append('g').attr('class', 'viewfield-group currentView highlighted');
+           groupsEnter.append('g').attr('class', 'viewfield-scale'); // update
 
-         var geometryOnlyCollection = {
-           type: 'RegionFeatureCollection',
-           features: geometryFeatures
-         };
-         whichPolygonGetter = whichPolygon_1(geometryOnlyCollection);
+           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 loadGroups(feature) {
-           var props = feature.properties;
+         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 (!props.groups) {
-             props.groups = [];
+           if (service && ~~context.map().zoom() >= minZoom) {
+             editOn();
+             update();
+           } else {
+             editOff();
            }
+         }
 
-           if (props.country) {
-             props.groups.push(props.country);
-           }
+         drawImages.enabled = function () {
+           update();
+           return this;
+         };
 
-           if (props.m49 !== '001') {
-             props.groups.push('001');
-           }
-         }
+         drawImages.supported = function () {
+           return !!getService();
+         };
 
-         function loadM49(feature) {
-           var props = feature.properties;
+         init();
+         return drawImages;
+       }
 
-           if (!props.m49 && props.iso1N3) {
-             props.m49 = props.iso1N3;
-           }
-         }
+       function svgMapillarySigns(projection, context, dispatch) {
+         var throttledRedraw = throttle(function () {
+           dispatch.call('change');
+         }, 1000);
 
-         function loadIsoStatus(feature) {
-           var props = feature.properties;
+         var minZoom = 12;
+         var layer = select(null);
 
-           if (!props.isoStatus && props.iso1A2) {
-             props.isoStatus = 'official';
-           }
-         }
+         var _mapillary;
 
-         function loadLevel(feature) {
-           var props = feature.properties;
-           if (props.level) return;
+         function init() {
+           if (svgMapillarySigns.initialized) return; // run once
 
-           if (!props.country) {
-             props.level = 'country';
-           } else if (props.isoStatus === 'official') {
-             props.level = 'territory';
-           } else {
-             props.level = 'subterritory';
-           }
+           svgMapillarySigns.enabled = false;
+           svgMapillarySigns.initialized = true;
          }
 
-         function loadRoadSpeedUnit(feature) {
-           var props = feature.properties;
+         function getService() {
+           if (services.mapillary && !_mapillary) {
+             _mapillary = services.mapillary;
 
-           if (props.roadSpeedUnit === undefined && props.iso1A2 && props.iso1A2 !== 'EU') {
-             props.roadSpeedUnit = 'km/h';
+             _mapillary.event.on('loadedSigns', throttledRedraw);
+           } else if (!services.mapillary && _mapillary) {
+             _mapillary = null;
            }
+
+           return _mapillary;
          }
 
-         function loadDriveSide(feature) {
-           var props = feature.properties;
+         function showLayer() {
+           var service = getService();
+           if (!service) return;
+           service.loadSignResources(context);
+           editOn();
+         }
 
-           if (props.driveSide === undefined && props.iso1A2 && props.iso1A2 !== 'EU') {
-             props.driveSide = 'right';
-           }
+         function hideLayer() {
+           throttledRedraw.cancel();
+           editOff();
          }
 
-         function loadFlag(feature) {
-           if (!feature.properties.iso1A2) return;
-           var flag = feature.properties.iso1A2.replace(/./g, function (_char) {
-             return String.fromCodePoint(_char.charCodeAt(0) + 127397);
-           });
-           feature.properties.emojiFlag = flag;
+         function editOn() {
+           layer.style('display', 'block');
          }
 
-         function loadMembersForGroupsOf(feature) {
-           var featureID = feature.properties.id;
-           var standardizedGroupIDs = [];
+         function editOff() {
+           layer.selectAll('.icon-sign').remove();
+           layer.style('display', 'none');
+         }
 
-           for (var j in feature.properties.groups) {
-             var groupID = feature.properties.groups[j];
-             var groupFeature = featuresByCode[groupID];
-             standardizedGroupIDs.push(groupFeature.properties.id);
+         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 (groupFeature.properties.members) {
-               groupFeature.properties.members.push(featureID);
-             } else {
-               groupFeature.properties.members = [featureID];
+               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);
+                 });
+               }
              }
-           }
-
-           feature.properties.groups = standardizedGroupIDs;
+           });
          }
 
-         function cacheFeatureByIDs(feature) {
-           for (var k in identifierProps) {
-             var prop = identifierProps[k];
-             var id = prop && feature.properties[prop];
+         function filterData(detectedFeatures) {
+           var fromDate = context.photos().fromDate();
+           var toDate = context.photos().toDate();
 
-             if (id) {
-               id = id.replace(idFilterRegex, '').toUpperCase();
-               featuresByCode[id] = feature;
-             }
+           if (fromDate) {
+             var fromTimestamp = new Date(fromDate).getTime();
+             detectedFeatures = detectedFeatures.filter(function (feature) {
+               return new Date(feature.last_seen_at).getTime() >= fromTimestamp;
+             });
            }
 
-           if (feature.properties.aliases) {
-             for (var j in feature.properties.aliases) {
-               var alias = feature.properties.aliases[j].replace(idFilterRegex, '').toUpperCase();
-               featuresByCode[alias] = feature;
-             }
+           if (toDate) {
+             var toTimestamp = new Date(toDate).getTime();
+             detectedFeatures = detectedFeatures.filter(function (feature) {
+               return new Date(feature.first_seen_at).getTime() <= toTimestamp;
+             });
            }
-         }
-       }
 
-       function locArray(loc) {
-         if (Array.isArray(loc)) {
-           return loc;
-         } else if (loc.coordinates) {
-           return loc.coordinates;
+           return detectedFeatures;
          }
 
-         return loc.geometry.coordinates;
-       }
+         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
 
-       function smallestFeature(loc) {
-         var query = locArray(loc);
-         var featureProperties = whichPolygonGetter(query);
-         if (!featureProperties) return null;
-         return featuresByCode[featureProperties.id];
-       }
+           signs.exit().remove(); // enter
 
-       function countryFeature(loc) {
-         var feature = smallestFeature(loc);
-         if (!feature) return null;
-         var countryCode = feature.properties.country || feature.properties.iso1A2;
-         return featuresByCode[countryCode];
-       }
+           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
 
-       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;
+           signs.merge(enter).attr('transform', transform);
+         }
 
-           for (var i in features) {
-             var _feature3 = features[i];
+         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 (_feature3.properties.level === targetLevel || levels.indexOf(_feature3.properties.level) > targetLevelIndex) {
-               return _feature3;
+           if (enabled) {
+             if (service && ~~context.map().zoom() >= minZoom) {
+               editOn();
+               update();
+               service.loadSigns(projection);
+               service.showSignDetections(true);
+             } else {
+               editOff();
              }
+           } else if (service) {
+             service.showSignDetections(false);
            }
-
-           return null;
          }
 
-         return countryFeature(loc);
-       }
-
-       function featureForID(id) {
-         var stringID;
-
-         if (typeof id === 'number') {
-           stringID = id.toString();
+         drawSigns.enabled = function (_) {
+           if (!arguments.length) return svgMapillarySigns.enabled;
+           svgMapillarySigns.enabled = _;
 
-           if (stringID.length === 1) {
-             stringID = '00' + stringID;
-           } else if (stringID.length === 2) {
-             stringID = '0' + stringID;
+           if (svgMapillarySigns.enabled) {
+             showLayer();
+             context.photos().on('change.mapillary_signs', update);
+           } else {
+             hideLayer();
+             context.photos().on('change.mapillary_signs', null);
            }
-         } else {
-           stringID = id.replace(idFilterRegex, '').toUpperCase();
-         }
 
-         return featuresByCode[stringID] || null;
-       }
+           dispatch.call('change');
+           return this;
+         };
 
-       function smallestOrMatchingFeature(query) {
-         if (_typeof(query) === 'object') {
-           return smallestFeature(query);
-         }
+         drawSigns.supported = function () {
+           return !!getService();
+         };
 
-         return featureForID(query);
+         init();
+         return drawSigns;
        }
 
-       function feature(query, opts) {
-         if (_typeof(query) === 'object') {
-           return featureForLoc(query, opts);
-         }
+       function svgMapillaryMapFeatures(projection, context, dispatch) {
+         var throttledRedraw = throttle(function () {
+           dispatch.call('change');
+         }, 1000);
 
-         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 = [];
+         var minZoom = 12;
+         var layer = select(null);
 
-         if (!strict || _typeof(query) === 'object') {
-           features.push(feature);
-         }
+         var _mapillary;
 
-         var properties = feature.properties;
+         function init() {
+           if (svgMapillaryMapFeatures.initialized) return; // run once
 
-         for (var i in properties.groups) {
-           var groupID = properties.groups[i];
-           features.push(featuresByCode[groupID]);
+           svgMapillaryMapFeatures.enabled = false;
+           svgMapillaryMapFeatures.initialized = true;
          }
 
-         return features;
-       }
-       function roadSpeedUnit(query) {
-         var feature = smallestOrMatchingFeature(query);
-         return feature && feature.properties.roadSpeedUnit || null;
-       }
-
-       var _dataDeprecated;
+         function getService() {
+           if (services.mapillary && !_mapillary) {
+             _mapillary = services.mapillary;
 
-       var _nsi;
+             _mapillary.event.on('loadedMapFeatures', throttledRedraw);
+           } else if (!services.mapillary && _mapillary) {
+             _mapillary = null;
+           }
 
-       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
+           return _mapillary;
+         }
 
-         _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
+         function showLayer() {
+           var service = getService();
+           if (!service) return;
+           service.loadObjectResources(context);
+           editOn();
+         }
 
-           _nsi.matcher.buildMatchIndex(d.brands); // index all known wikipedia and wikidata tags
+         function hideLayer() {
+           throttledRedraw.cancel();
+           editOff();
+         }
 
+         function editOn() {
+           layer.style('display', 'block');
+         }
 
-           Object.keys(d.brands).forEach(function (kvnd) {
-             var brand = d.brands[kvnd];
-             var wd = brand.tags['brand:wikidata'];
-             var wp = brand.tags['brand:wikipedia'];
+         function editOff() {
+           layer.selectAll('.icon-map-feature').remove();
+           layer.style('display', 'none');
+         }
 
-             if (wd) {
-               _nsi.wikidata[wd] = kvnd;
-             }
+         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 (wp) {
-               _nsi.wikipedia[wp] = kvnd;
+               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);
+                 });
+               }
              }
            });
-           return _nsi;
-         })["catch"](function () {
-           /* ignore */
-         });
-
-         function oldTagIssues(entity, graph) {
-           var oldTags = Object.assign({}, entity.tags); // shallow copy
-
-           var preset = _mainPresetIndex.match(entity, graph);
-           var subtype = 'deprecated_tags';
-           if (!preset) return []; // upgrade preset..
-
-           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..
-
-
-           if (_dataDeprecated) {
-             var deprecatedTags = entity.deprecatedTags(_dataDeprecated);
-
-             if (deprecatedTags.length) {
-               deprecatedTags.forEach(function (tag) {
-                 graph = actionUpgradeTags(entity.id, tag.old, tag.replace)(graph);
-               });
-               entity = graph.entity(entity.id);
-             }
-           } // add missing addTags..
-
+         }
 
-           var newTags = Object.assign({}, entity.tags); // shallow copy
+         function filterData(detectedFeatures) {
+           var fromDate = context.photos().fromDate();
+           var toDate = context.photos().toDate();
 
-           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 (fromDate) {
+             detectedFeatures = detectedFeatures.filter(function (feature) {
+               return new Date(feature.last_seen_at).getTime() >= new Date(fromDate).getTime();
              });
            }
 
-           if (_nsi) {
-             // Do `wikidata` or `wikipedia` identify this entity as a brand?  #6416
-             // If so, these tags can be swapped to `brand:wikidata`/`brand:wikipedia`
-             var isBrand;
-
-             if (newTags.wikidata) {
-               // try matching `wikidata`
-               isBrand = _nsi.wikidata[newTags.wikidata];
-             }
-
-             if (!isBrand && newTags.wikipedia) {
-               // fallback to `wikipedia`
-               isBrand = _nsi.wikipedia[newTags.wikipedia];
-             }
+           if (toDate) {
+             detectedFeatures = detectedFeatures.filter(function (feature) {
+               return new Date(feature.first_seen_at).getTime() <= new Date(toDate).getTime();
+             });
+           }
 
-             if (isBrand && !newTags.office) {
-               // but avoid doing this for corporate offices
-               if (newTags.wikidata) {
-                 newTags['brand:wikidata'] = newTags.wikidata;
-                 delete newTags.wikidata;
-               }
+           return detectedFeatures;
+         }
 
-               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.
+         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
 
-             } // try key/value|name match against name-suggestion-index
+           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';
+             }
 
-             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);
+             return '#' + d.value;
+           });
+           enter.append('rect').attr('width', '24px').attr('height', '24px').attr('x', '-12px').attr('y', '-12px'); // update
 
-                 var match = _nsi.matcher.matchKVN(k, newTags[k], newTags.name, countryCode && countryCode.toLowerCase());
+           mapFeatures.merge(enter).attr('transform', transform);
+         }
 
-                 if (!match) continue; // for now skip ambiguous matches (like Target~(USA) vs Target~(Australia))
+         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 (match.d) continue;
-                 var brand = _nsi.brands[match.kvnd];
+           if (enabled) {
+             if (service && ~~context.map().zoom() >= minZoom) {
+               editOn();
+               update();
+               service.loadMapFeatures(projection);
+               service.showFeatureDetections(true);
+             } else {
+               editOff();
+             }
+           } else if (service) {
+             service.showFeatureDetections(false);
+           }
+         }
 
-                 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];
-                     }
+         drawMapFeatures.enabled = function (_) {
+           if (!arguments.length) return svgMapillaryMapFeatures.enabled;
+           svgMapillaryMapFeatures.enabled = _;
 
-                     return acc;
-                   }, {});
-                   nsiKeys.forEach(function (k) {
-                     return delete newTags[k];
-                   });
-                   Object.assign(newTags, brand.tags, keepTags);
-                   break;
-                 }
-               }
-             }
-           } // determine diff
+           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;
+         };
 
-           var tagDiff = utilTagDiff(oldTags, newTags);
-           if (!tagDiff.length) return [];
-           var isOnlyAddingTags = tagDiff.every(function (d) {
-             return d.type === '+';
-           });
-           var prefix = '';
+         drawMapFeatures.supported = function () {
+           return !!getService();
+         };
 
-           if (subtype === 'noncanonical_brand') {
-             prefix = 'noncanonical_brand.';
-           } else if (subtype === 'deprecated_tags' && isOnlyAddingTags) {
-             subtype = 'incomplete_tags';
-             prefix = 'incomplete.';
-           } // don't allow autofixing brand tags
+         init();
+         return drawMapFeatures;
+       }
 
+       function svgOpenstreetcamImages(projection, context, dispatch) {
+         var throttledRedraw = throttle(function () {
+           dispatch.call('change');
+         }, 1000);
 
-           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 minZoom = 12;
+         var minMarkerZoom = 16;
+         var minViewfieldZoom = 18;
+         var layer = select(null);
 
-           function doUpgrade(graph) {
-             var currEntity = graph.hasEntity(entity.id);
-             if (!currEntity) return graph;
-             var newTags = Object.assign({}, currEntity.tags); // shallow copy
+         var _openstreetcam;
 
-             tagDiff.forEach(function (diff) {
-               if (diff.type === '-') {
-                 delete newTags[diff.key];
-               } else if (diff.type === '+') {
-                 newTags[diff.key] = diff.newVal;
-               }
-             });
-             return actionChangeTags(currEntity.id, newTags)(graph);
-           }
+         function init() {
+           if (svgOpenstreetcamImages.initialized) return; // run once
 
-           function showMessage(context) {
-             var currEntity = context.hasEntity(entity.id);
-             if (!currEntity) return '';
-             var messageID = "issues.outdated_tags.".concat(prefix, "message");
+           svgOpenstreetcamImages.enabled = false;
+           svgOpenstreetcamImages.initialized = true;
+         }
 
-             if (subtype === 'noncanonical_brand' && isOnlyAddingTags) {
-               messageID += '_incomplete';
-             }
+         function getService() {
+           if (services.openstreetcam && !_openstreetcam) {
+             _openstreetcam = services.openstreetcam;
 
-             return _t.html(messageID, {
-               feature: utilDisplayLabel(currEntity, context.graph())
-             });
+             _openstreetcam.event.on('loadedImages', throttledRedraw);
+           } else if (!services.openstreetcam && _openstreetcam) {
+             _openstreetcam = null;
            }
 
-           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 _openstreetcam;
          }
 
-         function oldMultipolygonIssues(entity, graph) {
-           var multipolygon, outerWay;
-
-           if (entity.type === 'relation') {
-             outerWay = osmOldMultipolygonOuterMemberOfRelation(entity, graph);
-             multipolygon = entity;
-           } else if (entity.type === 'way') {
-             multipolygon = osmIsOldMultipolygonOuterMember(entity, graph);
-             outerWay = entity;
-           } else {
-             return [];
-           }
+         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 (!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'));
-                 }
-               })];
-             }
-           })];
+         function hideLayer() {
+           throttledRedraw.cancel();
+           layer.transition().duration(250).style('opacity', 0).on('end', editOff);
+         }
 
-           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);
-           }
+         function editOn() {
+           layer.style('display', 'block');
+         }
 
-           function showMessage(context) {
-             var currMultipolygon = context.hasEntity(multipolygon.id);
-             if (!currMultipolygon) return '';
-             return _t.html('issues.old_multipolygon.message', {
-               multipolygon: utilDisplayLabel(currMultipolygon, context.graph())
-             });
-           }
+         function editOff() {
+           layer.selectAll('.viewfield-group').remove();
+           layer.style('display', 'none');
+         }
 
-           function showReference(selection) {
-             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.old_multipolygon.reference'));
-           }
+         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 validation = function checkOutdatedTags(entity, graph) {
-           var issues = oldMultipolygonIssues(entity, graph);
-           if (!issues.length) issues = oldTagIssues(entity, graph);
-           return issues;
-         };
+         function mouseover(d3_event, d) {
+           var service = getService();
+           if (service) service.setStyles(context, d);
+         }
 
-         validation.type = type;
-         return validation;
-       }
+         function mouseout() {
+           var service = getService();
+           if (service) service.setStyles(context, null);
+         }
 
-       function validationPrivateData() {
-         var type = 'private_data'; // assume that some buildings are private
+         function transform(d) {
+           var t = svgPointTransform(projection)(d);
 
-         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
+           if (d.ca) {
+             t += ' rotate(' + Math.floor(d.ca) + ',0,0)';
+           }
 
-         var publicKeys = {
-           amenity: true,
-           craft: true,
-           historic: true,
-           leisure: true,
-           office: true,
-           shop: true,
-           tourism: true
-         }; // these tags may contain personally identifying info
+           return t;
+         }
 
-         var personalTags = {
-           'contact:email': true,
-           'contact:fax': true,
-           'contact:phone': true,
-           email: true,
-           fax: true,
-           phone: true
-         };
+         function filterImages(images) {
+           var fromDate = context.photos().fromDate();
+           var toDate = context.photos().toDate();
+           var usernames = context.photos().usernames();
 
-         var validation = function checkPrivateData(entity) {
-           var tags = entity.tags;
-           if (!tags.building || !privateBuildingValues[tags.building]) return [];
-           var keepTags = {};
+           if (fromDate) {
+             var fromTimestamp = new Date(fromDate).getTime();
+             images = images.filter(function (item) {
+               return new Date(item.captured_at).getTime() >= fromTimestamp;
+             });
+           }
 
-           for (var k in tags) {
-             if (publicKeys[k]) return []; // probably a public feature
+           if (toDate) {
+             var toTimestamp = new Date(toDate).getTime();
+             images = images.filter(function (item) {
+               return new Date(item.captured_at).getTime() <= toTimestamp;
+             });
+           }
 
-             if (!personalTags[k]) {
-               keepTags[k] = tags[k];
-             }
+           if (usernames) {
+             images = images.filter(function (item) {
+               return usernames.indexOf(item.captured_by) !== -1;
+             });
            }
 
-           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'));
-                 }
-               })];
-             }
-           })];
+           return images;
+         }
 
-           function doUpgrade(graph) {
-             var currEntity = graph.hasEntity(entity.id);
-             if (!currEntity) return graph;
-             var newTags = Object.assign({}, currEntity.tags); // shallow copy
+         function filterSequences(sequences) {
+           var fromDate = context.photos().fromDate();
+           var toDate = context.photos().toDate();
+           var usernames = context.photos().usernames();
 
-             tagDiff.forEach(function (diff) {
-               if (diff.type === '-') {
-                 delete newTags[diff.key];
-               } else if (diff.type === '+') {
-                 newTags[diff.key] = diff.newVal;
-               }
+           if (fromDate) {
+             var fromTimestamp = new Date(fromDate).getTime();
+             sequences = sequences.filter(function (image) {
+               return new Date(image.properties.captured_at).getTime() >= fromTimestamp;
              });
-             return actionChangeTags(currEntity.id, newTags)(graph);
            }
 
-           function showMessage(context) {
-             var currEntity = context.hasEntity(this.entityIds[0]);
-             if (!currEntity) return '';
-             return _t.html('issues.private_data.contact.message', {
-               feature: utilDisplayLabel(currEntity, context.graph())
+           if (toDate) {
+             var toTimestamp = new Date(toDate).getTime();
+             sequences = sequences.filter(function (image) {
+               return new Date(image.properties.captured_at).getTime() <= toTimestamp;
              });
            }
 
-           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;
+           if (usernames) {
+             sequences = sequences.filter(function (image) {
+               return usernames.indexOf(image.properties.captured_by) !== -1;
              });
            }
-         };
-
-         validation.type = type;
-         return validation;
-       }
 
-       var _discardNameRegexes = [];
-       function validationSuspiciousName() {
-         var type = 'suspicious_name';
-         var keysToTestForGenericValues = ['aerialway', 'aeroway', 'amenity', 'building', 'craft', 'highway', 'leisure', 'railway', 'man_made', 'office', 'shop', 'tourism', 'waterway']; // 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.
+           return sequences;
+         }
 
-         _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 */
-         });
+         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 isDiscardedSuggestionName(lowercaseName) {
-           return _discardNameRegexes.some(function (regex) {
-             return regex.test(lowercaseName);
-           });
-         } // test if the name is just the key or tag value (e.g. "park")
+           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
 
-         function nameMatchesRawTag(lowercaseName, tags) {
-           for (var i = 0; i < keysToTestForGenericValues.length; i++) {
-             var key = keysToTestForGenericValues[i];
-             var val = tags[key];
+           traces.exit().remove(); // enter/update
 
-             if (val) {
-               val = val.toLowerCase();
+           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
 
-               if (key === lowercaseName || val === lowercaseName || key.replace(/\_/g, ' ') === lowercaseName || val.replace(/\_/g, ' ') === lowercaseName) {
-                 return true;
-               }
-             }
-           }
+           groups.exit().remove(); // enter
 
-           return false;
-         }
+           var groupsEnter = groups.enter().append('g').attr('class', 'viewfield-group').on('mouseenter', mouseover).on('mouseleave', mouseout).on('click', click);
+           groupsEnter.append('g').attr('class', 'viewfield-scale'); // update
 
-         function isGenericName(name, tags) {
-           name = name.toLowerCase();
-           return nameMatchesRawTag(name, tags) || isDiscardedSuggestionName(name);
+           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 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 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);
 
-                   delete tags[nameKey];
-                   context.perform(actionChangeTags(entityId, tags), _t('issues.fix.remove_generic_name.annotation'));
-                 }
-               })];
+           if (enabled) {
+             if (service && ~~context.map().zoom() >= minZoom) {
+               editOn();
+               update();
+               service.loadImages(projection);
+             } else {
+               editOff();
              }
-           });
-
-           function showReference(selection) {
-             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.generic_name.reference'));
            }
          }
 
-         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
-
-                   delete tags[nameKey];
-                   context.perform(actionChangeTags(entityId, tags), _t('issues.fix.remove_mistaken_name.annotation'));
-                 }
-               })];
-             }
-           });
+         drawImages.enabled = function (_) {
+           if (!arguments.length) return svgOpenstreetcamImages.enabled;
+           svgOpenstreetcamImages.enabled = _;
 
-           function showReference(selection) {
-             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.generic_name.reference'));
+           if (svgOpenstreetcamImages.enabled) {
+             showLayer();
+             context.photos().on('change.openstreetcam_images', update);
+           } else {
+             hideLayer();
+             context.photos().on('change.openstreetcam_images', null);
            }
-         }
 
-         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(';');
+           dispatch.call('change');
+           return this;
+         };
 
-           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];
+         drawImages.supported = function () {
+           return !!getService();
+         };
 
-             if (notNames.length) {
-               for (var i in notNames) {
-                 var notName = notNames[i];
+         init();
+         return drawImages;
+       }
 
-                 if (notName && value === notName) {
-                   issues.push(makeIncorrectNameIssue(entity.id, key, value, langCode));
-                   continue;
-                 }
-               }
-             }
+       function svgOsm(projection, context, dispatch) {
+         var enabled = true;
 
-             if (isGenericName(value, entity.tags)) {
-               issues.push(makeGenericNameIssue(entity.id, key, value, langCode));
-             }
+         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 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');
+           });
+         }
+
+         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');
+           });
+         }
+
+         drawOsm.enabled = function (val) {
+           if (!arguments.length) return enabled;
+           enabled = val;
+
+           if (enabled) {
+             showLayer();
+           } else {
+             hideLayer();
            }
 
-           return issues;
+           dispatch.call('change');
+           return this;
          };
 
-         validation.type = type;
-         return validation;
+         return drawOsm;
        }
 
-       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
+       var _notesEnabled = false;
 
-         var epsilon = 0.05;
-         var nodeThreshold = 10;
+       var _osmService;
 
-         function isBuilding(entity, graph) {
-           if (entity.type !== 'way' || entity.geometry(graph) !== 'area') return false;
-           return entity.tags.building && entity.tags.building !== 'no';
+       function svgNotes(projection, context, dispatch) {
+         if (!dispatch) {
+           dispatch = dispatch$8('change');
          }
 
-         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
-
-           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
+         var throttledRedraw = throttle(function () {
+           dispatch.call('change');
+         }, 1000);
 
-           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 minZoom = 12;
+         var touchLayer = select(null);
+         var drawLayer = select(null);
+         var _notesVisible = false;
 
-           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
+         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.
 
-           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 (!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
+         function getService() {
+           if (services.osm && !_osmService) {
+             _osmService = services.osm;
 
-             autoArgs = [autoAction, _t('operations.orthogonalize.annotation.feature', {
-               n: 1
-             })];
+             _osmService.on('loadedNotes', throttledRedraw);
+           } else if (!services.osm && _osmService) {
+             _osmService = null;
            }
 
-           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
-
-                   context.perform(actionOrthogonalize(entityId, context.projection, undefined, degreeThreshold), _t('operations.orthogonalize.annotation.feature', {
-                     n: 1
-                   })); // run after the squaring transition (currently 150ms)
+           return _osmService;
+         } // Show the notes
 
-                   window.setTimeout(function () {
-                     completionHandler();
-                   }, 175);
-                 }
-               })
-               /*
-               new validationIssueFix({
-                   title: t.html('issues.fix.tag_as_unsquare.title'),
-                   onClick: function(context) {
-                       var entityId = this.issue.entityIds[0];
-                       var entity = context.entity(entityId);
-                       var tags = Object.assign({}, entity.tags);  // shallow copy
-                       tags.nonsquare = 'yes';
-                       context.perform(
-                           actionChangeTags(entityId, tags),
-                           t('issues.fix.tag_as_unsquare.annotation')
-                       );
-                   }
-               })
-               */
-               ];
-             }
-           })];
 
-           function showReference(selection) {
-             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.unsquare_way.buildings.reference'));
+         function editOn() {
+           if (!_notesVisible) {
+             _notesVisible = true;
+             drawLayer.style('display', 'block');
            }
-         };
+         } // Immediately remove the notes and their touch targets
 
-         validation.type = type;
-         return validation;
-       }
 
-       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 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.
 
-       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 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.
 
 
-         var _headCache = validationCache(); // issues after all user edits
+         function layerOff() {
+           throttledRedraw.cancel();
+           drawLayer.interrupt();
+           touchLayer.selectAll('.note').remove();
+           drawLayer.transition().duration(250).style('opacity', 0).on('end interrupt', function () {
+             editOff();
+             dispatch.call('change');
+           });
+         } // Update the note markers
 
 
-         var _validatedGraph = null;
+         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 _deferred = new Set(); //
-         // initialize the validator rulesets
-         //
+           var notes = drawLayer.selectAll('.note').data(data, function (d) {
+             return d.status + d.id;
+           }); // exit
 
+           notes.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 notesEnter = notes.enter().append('g').attr('class', function (d) {
+             return 'note note-' + d.id + ' ' + d.status;
+           }).classed('new', function (d) {
+             return d.id < 0;
            });
-           var disabledRules = corePreferences('validate-disabledRules');
+           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
 
-           if (disabledRules) {
-             disabledRules.split(',').forEach(function (key) {
-               _disabledRules[key] = true;
-             });
-           }
-         };
+           notes.merge(notesEnter).sort(sortY).classed('selected', function (d) {
+             var mode = context.mode();
+             var isMoving = mode && mode.id === 'drag-note'; // no shadows when dragging
 
-         function reset(resetIgnored) {
-           Array.from(_deferred).forEach(function (handle) {
-             window.cancelIdleCallback(handle);
+             return !isMoving && d.id === selectedID;
+           }).attr('transform', getTransform); // Draw targets..
 
-             _deferred["delete"](handle);
-           }); // clear caches
+           if (touchLayer.empty()) return;
+           var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+           var targets = touchLayer.selectAll('.note').data(data, function (d) {
+             return d.id;
+           }); // exit
 
-           if (resetIgnored) _ignoredIssueIDs = {};
-           _baseCache = validationCache();
-           _headCache = validationCache();
-           _validatedGraph = null;
-         } //
-         // clear caches, called whenever iD resets after a save
-         //
+           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) {
+             var newClass = d.id < 0 ? 'new' : '';
+             return 'note target note-' + d.id + ' ' + fillClass + newClass;
+           }).attr('transform', getTransform);
 
-         validator.reset = function () {
-           reset(true);
-         };
+           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.
 
-         validator.resetIgnoredIssues = function () {
-           _ignoredIssueIDs = {}; // reload UI
 
-           dispatch$1.call('validated');
-         }; // must update issues when the user changes the unsquare thereshold
+         function drawNotes(selection) {
+           var service = getService();
+           var surface = context.surface();
 
+           if (surface && !surface.empty()) {
+             touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
+           }
 
-         validator.reloadUnsquareIssues = function () {
-           reloadUnsquareIssues(_headCache, context.graph());
-           reloadUnsquareIssues(_baseCache, context.history().base());
-           dispatch$1.call('validated');
-         };
+           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);
 
-         function reloadUnsquareIssues(cache, graph) {
-           var checkUnsquareWay = _rules.unsquare_way;
-           if (typeof checkUnsquareWay !== 'function') return; // uncache existing
+           if (_notesEnabled) {
+             if (service && ~~context.map().zoom() >= minZoom) {
+               editOn();
+               service.loadNotes(projection);
+               updateMarkers();
+             } else {
+               editOff();
+             }
+           }
+         } // Toggles the layer on and off
 
-           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
 
-           buildings.forEach(function (entity) {
-             var detected = checkUnsquareWay(entity, graph);
-             if (detected.length !== 1) return;
-             var issue = detected[0];
+         drawNotes.enabled = function (val) {
+           if (!arguments.length) return _notesEnabled;
+           _notesEnabled = val;
+
+           if (_notesEnabled) {
+             layerOn();
+           } else {
+             layerOff();
 
-             if (!cache.issuesByEntityID[entity.id]) {
-               cache.issuesByEntityID[entity.id] = new Set();
+             if (context.selectedNoteID()) {
+               context.enter(modeBrowse(context));
              }
+           }
 
-             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'
-         // };
+           dispatch.call('change');
+           return this;
+         };
 
+         return drawNotes;
+       }
 
-         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 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;
+           });
+         }
 
-             var entityIds = issue.entityIds || [];
+         return drawTouch;
+       }
 
-             for (var i = 0; i < entityIds.length; i++) {
-               var entityId = entityIds[i];
+       function refresh(selection, node) {
+         var cr = node.getBoundingClientRect();
+         var prop = [cr.width, cr.height];
+         selection.property('__dimensions__', prop);
+         return prop;
+       }
 
-               if (!context.hasEntity(entityId)) {
-                 delete _headCache.issuesByEntityID[entityId];
-                 delete _headCache.issuesByIssueID[issue.id];
-                 return false;
-               }
-             }
+       function utilGetDimensions(selection, force) {
+         if (!selection || selection.empty()) {
+           return [0, 0];
+         }
 
-             if (opts.what === 'edited' && _baseCache.issuesByIssueID[issue.id]) return false;
+         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;
+         }
 
-             if (opts.where === 'visible') {
-               var extent = issue.extent(context.graph());
-               if (!view.intersects(extent)) return false;
-             }
+         var node = selection.node();
 
-             return true;
-           });
-         };
+         if (dimensions === null) {
+           refresh(selection, node);
+           return selection;
+         }
 
-         validator.getResolvedIssues = function () {
-           var baseIssues = Object.values(_baseCache.issuesByIssueID);
-           return baseIssues.filter(function (issue) {
-             return !_headCache.issuesByIssueID[issue.id];
-           });
-         };
+         return selection.property('__dimensions__', [dimensions[0], dimensions[1]]).attr('width', dimensions[0]).attr('height', dimensions[1]);
+       }
 
-         validator.focusIssue = function (issue) {
-           var extent = issue.extent(context.graph());
+       function svgLayers(projection, context) {
+         var dispatch = dispatch$8('change');
+         var svg = select(null);
+         var _layers = [{
+           id: 'osm',
+           layer: svgOsm(projection, context, dispatch)
+         }, {
+           id: 'notes',
+           layer: svgNotes(projection, context, dispatch)
+         }, {
+           id: 'data',
+           layer: svgData(projection, context, dispatch)
+         }, {
+           id: 'keepRight',
+           layer: svgKeepRight(projection, context, dispatch)
+         }, {
+           id: 'improveOSM',
+           layer: svgImproveOSM(projection, context, dispatch)
+         }, {
+           id: 'osmose',
+           layer: svgOsmose(projection, context, dispatch)
+         }, {
+           id: 'streetside',
+           layer: svgStreetside(projection, context, dispatch)
+         }, {
+           id: 'mapillary',
+           layer: svgMapillaryImages(projection, context, dispatch)
+         }, {
+           id: 'mapillary-position',
+           layer: svgMapillaryPosition(projection, context)
+         }, {
+           id: 'mapillary-map-features',
+           layer: svgMapillaryMapFeatures(projection, context, dispatch)
+         }, {
+           id: 'mapillary-signs',
+           layer: svgMapillarySigns(projection, context, dispatch)
+         }, {
+           id: 'openstreetcam',
+           layer: svgOpenstreetcamImages(projection, context, dispatch)
+         }, {
+           id: 'debug',
+           layer: svgDebug(projection, context)
+         }, {
+           id: 'geolocate',
+           layer: svgGeolocate(projection)
+         }, {
+           id: 'touch',
+           layer: svgTouch()
+         }];
 
-           if (extent) {
-             var setZoom = Math.max(context.map().zoom(), 19);
-             context.map().unobscuredCenterZoomEase(extent.center(), setZoom); // select the first entity
+         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);
+           });
+         }
 
-             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
-             }
-           }
+         drawLayers.all = function () {
+           return _layers;
          };
 
-         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
-
-
-         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
+         drawLayers.layer = function (id) {
+           var obj = _layers.find(function (o) {
+             return o.id === id;
+           });
 
-         validator.getSharedEntityIssues = function (entityIDs, options) {
-           var cache = _headCache; // gather the issues that are common to all the entities
+           return obj && obj.layer;
+         };
 
-           var issueIDs = entityIDs.reduce(function (acc, entityID) {
-             var entityIssueIDs = cache.issuesByEntityID[entityID] || new Set();
+         drawLayers.only = function (what) {
+           var arr = [].concat(what);
 
-             if (!acc) {
-               return new Set(entityIssueIDs);
-             }
+           var all = _layers.map(function (layer) {
+             return layer.id;
+           });
 
-             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;
-             }
+           return drawLayers.remove(utilArrayDifference(all, arr));
+         };
 
-             var index1 = orderedIssueTypes.indexOf(issue1.type);
-             var index2 = orderedIssueTypes.indexOf(issue2.type);
+         drawLayers.remove = function (what) {
+           var arr = [].concat(what);
+           arr.forEach(function (id) {
+             _layers = _layers.filter(function (o) {
+               return o.id !== id;
+             });
+           });
+           dispatch.call('change');
+           return this;
+         };
 
-             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;
+         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;
          };
 
-         validator.getEntityIssues = function (entityID, options) {
-           return validator.getSharedEntityIssues([entityID], options);
+         drawLayers.dimensions = function (val) {
+           if (!arguments.length) return utilGetDimensions(svg);
+           utilSetDimensions(svg, val);
+           return this;
          };
 
-         validator.getRuleKeys = function () {
-           return Object.keys(_rules);
-         };
+         return utilRebind(drawLayers, dispatch, 'on');
+       }
 
-         validator.isRuleEnabled = function (key) {
-           return !_disabledRules[key];
+       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
          };
 
-         validator.toggleRule = function (key) {
-           if (_disabledRules[key]) {
-             delete _disabledRules[key];
-           } else {
-             _disabledRules[key] = true;
-           }
+         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
 
-           corePreferences('validate-disabledRules', Object.keys(_disabledRules).join(','));
-           validator.validate();
-         };
+           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
 
-         validator.disableRules = function (keys) {
-           _disabledRules = {};
-           keys.forEach(function (k) {
-             _disabledRules[k] = true;
-           });
-           corePreferences('validate-disabledRules', Object.keys(_disabledRules).join(','));
-           validator.validate();
-         };
+           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
 
-         validator.ignoreIssue = function (id) {
-           _ignoredIssueIDs[id] = true;
-         }; //
-         // Run validation on a single entity for the given graph
-         //
+           targets.exit().remove();
 
+           var segmentWasEdited = function segmentWasEdited(d) {
+             var wayID = d.properties.entity.id; // if the whole line was edited, don't draw segment changes
 
-         function validateEntity(entity, graph) {
-           var entityIssues = []; // runs validation and appends resulting issues
+             if (!base.entities[wayID] || !fastDeepEqual(graph.entities[wayID].nodes, base.entities[wayID].nodes)) {
+               return false;
+             }
 
-           function runValidation(key) {
-             var fn = _rules[key];
+             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 (typeof fn !== 'function') {
-               console.error('no such validation rule = ' + key); // eslint-disable-line no-console
 
-               return;
-             }
+           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 detected = fn(entity, graph);
-             entityIssues = entityIssues.concat(detected);
-           } // run all rules
+           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
 
-           Object.keys(_rules).forEach(runValidation);
-           return entityIssues;
+           nopes.enter().append('path').merge(nopes).attr('d', getPath).attr('class', function (d) {
+             return 'way line target target-nope ' + nopeClass + d.id;
+           }).classed('segment-edited', segmentWasEdited);
          }
 
-         function 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];
+         function drawLines(selection, graph, entities, filter) {
+           var base = context.history().base();
 
-             if (entity.type === 'node') {
-               graph.parentWays(entity).forEach(function (parentWay) {
-                 acc.add(parentWay.id); // include parent ways
+           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;
 
-                 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
+             if (a.tags.highway) {
+               scoreA -= highway_stack[a.tags.highway];
+             }
 
-                 graph._parentWays[nodeID].forEach(function (wayID) {
-                   acc.add(wayID); // include connected ways
-                 });
-               });
+             if (b.tags.highway) {
+               scoreB -= highway_stack[b.tags.highway];
              }
 
-             checkParentRels.forEach(function (entity) {
-               // include parent relations
-               if (entity.type !== 'relation') {
-                 // but not super-relations
-                 graph.parentRelations(entity).forEach(function (parentRelation) {
-                   acc.add(parentRelation.id);
-                 });
-               }
-             });
-             return acc;
-           }, new Set());
-         } //
-         // Run validation for several entities, supplied `entityIDs`,
-         // against `graph` for the given `cache`
-         //
+             return scoreA - scoreB;
+           }
 
+           function drawLineGroup(selection, klass, isSelected) {
+             // Note: Don't add `.selected` class in draw modes
+             var mode = context.mode();
+             var isDrawing = mode && /^draw/.test(mode.id);
+             var selectedClass = !isDrawing && isSelected ? 'selected ' : '';
+             var lines = selection.selectAll('path').filter(filter).data(getPathData(isSelected), osmEntity.key);
+             lines.exit().remove(); // Optimization: Call expensive TagClasses only on enter selection. This
+             // works because osmEntity.key is defined to include the entity v attribute.
 
-         function validateEntities(entityIDs, graph, cache) {
-           // clear caches for existing issues related to these entities
-           entityIDs.forEach(cache.uncacheEntityID); // detect new issues and update caches
+             lines.enter().append('path').attr('class', function (d) {
+               var prefix = 'way line'; // if this line isn't styled by its own tags
 
-           entityIDs.forEach(function (entityID) {
-             var entity = graph.hasEntity(entityID); // don't validate deleted entities
+               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 (!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.
-         //
+                 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';
+                 }
+               }
+
+               var oldMPClass = oldMultiPolygonOuters[d.id] ? 'old-multipolygon ' : '';
+               return prefix + ' ' + klass + ' ' + selectedClass + oldMPClass + d.id;
+             }).classed('added', function (d) {
+               return !base.entities[d.id];
+             }).classed('geometry-edited', function (d) {
+               return graph.entities[d.id] && base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].nodes, base.entities[d.id].nodes);
+             }).classed('retagged', function (d) {
+               return graph.entities[d.id] && base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].tags, base.entities[d.id].tags);
+             }).call(svgTagClasses()).merge(lines).sort(waystack).attr('d', getPath).call(svgTagClasses().tags(svgRelationMemberTags(graph)));
+             return selection;
+           }
 
+           function getPathData(isSelected) {
+             return function () {
+               var layer = this.parentNode.__data__;
+               var data = pathdata[layer] || [];
+               return data.filter(function (d) {
+                 if (isSelected) {
+                   return context.selectedIDs().indexOf(d.id) !== -1;
+                 } else {
+                   return context.selectedIDs().indexOf(d.id) === -1;
+                 }
+               });
+             };
+           }
 
-         validator.validate = function () {
-           var currGraph = context.graph();
-           _validatedGraph = _validatedGraph || context.history().base();
+           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 (currGraph === _validatedGraph) {
-             dispatch$1.call('validated');
-             return;
+             if (detected.ie) {
+               markers.each(function () {
+                 this.parentNode.insertBefore(this, this);
+               });
+             }
            }
 
-           var oldGraph = _validatedGraph;
-           var difference = coreDifference(oldGraph, currGraph);
-           _validatedGraph = currGraph;
-           var createdAndModifiedEntityIDs = difference.extantIDs(true); // created/modified (true = w/relation members)
+           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);
 
-           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)
+             if (outer) {
+               ways.push(entity.mergeTags(outer.tags));
+               oldMultiPolygonOuters[outer.id] = true;
+             } else if (entity.geometry(graph) === 'line') {
+               ways.push(entity);
+             }
+           }
 
-           var modifiedAndDeletedEntityIDs = difference.deleted().concat(difference.modified()).map(function (entity) {
-             return entity.id;
+           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 entityIDsToCheckForOldGraph = entityIDsToValidate(modifiedAndDeletedEntityIDs, oldGraph); // concat the sets
-
-           entityIDsToCheckForOldGraph.forEach(entityIDsToCheck.add, entityIDsToCheck);
-           validateEntities(entityIDsToCheck, context.graph(), _headCache);
-           dispatch$1.call('validated');
-         };
-
-         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:
+           var covered = selection.selectAll('.layer-osm.covered'); // under areas
 
-         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 uncovered = selection.selectAll('.layer-osm.lines'); // over areas
 
-         context.on('exit.validator', validator.validate); // When merging fetched data:
+           var touchLayer = selection.selectAll('.layer-touch.lines'); // Draw lines..
 
-         context.history().on('merge.validator', function (entities) {
-           if (!entities) return;
-           var handle = window.requestIdleCallback(function () {
-             var entityIDs = entities.map(function (entity) {
-               return entity.id;
+           [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;
              });
-             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');
-           });
+             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..
 
-           _deferred.add(handle);
-         });
-         return validator;
-       }
+           touchLayer.call(drawTargets, graph, ways, filter);
+         }
 
-       function validationCache() {
-         var cache = {
-           issuesByIssueID: {},
-           // issue.id -> issue
-           issuesByEntityID: {} // entity.id -> set(issue.id)
+         return drawLines;
+       }
 
-         };
+       function svgMidpoints(projection, context) {
+         var targetRadius = 8;
 
-         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();
+         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
                }
-
-               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];
-         };
+           var targets = selection.selectAll('.midpoint.target').filter(function (d) {
+             return filter(d.properties.entity);
+           }).data(data, function key(d) {
+             return d.id;
+           }); // exit
 
-         cache.uncacheIssues = function (issues) {
-           issues.forEach(cache.uncacheIssue);
-         };
+           targets.exit().remove(); // enter/update
 
-         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
-         //
+           targets.enter().append('circle').attr('r', targetRadius).merge(targets).attr('class', function (d) {
+             return 'node midpoint target ' + fillClass + d.id;
+           }).attr('transform', getTransform);
+         }
 
+         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();
 
-         cache.uncacheEntityID = function (entityID) {
-           var issueIDs = cache.issuesByEntityID[entityID];
-           if (!issueIDs) return;
-           issueIDs.forEach(function (issueID) {
-             var issue = cache.issuesByIssueID[issueID];
+           if (mode && mode.id !== 'select' || !context.map().withinEditableZoom()) {
+             drawLayer.selectAll('.midpoint').remove();
+             touchLayer.selectAll('.midpoint.target').remove();
+             return;
+           }
 
-             if (issue) {
-               cache.uncacheIssue(issue);
-             } else {
-               delete cache.issuesByIssueID[issueID];
-             }
-           });
-           delete cache.issuesByEntityID[entityID];
-         };
+           var poly = extent.polygon();
+           var midpoints = {};
 
-         return cache;
-       }
+           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);
 
-       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 = [];
+             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('-');
 
-         var _origChanges;
+               if (midpoints[id]) {
+                 midpoints[id].parents.push(entity);
+               } else if (geoVecLength(projection(a.loc), projection(b.loc)) > 40) {
+                 var point = geoVecInterp(a.loc, b.loc, 0.5);
+                 var loc = null;
 
-         var _discardTags = {};
-         _mainFileFetcher.get('discarded').then(function (d) {
-           _discardTags = d;
-         })["catch"](function () {
-           /* ignore */
-         });
-         var uploader = utilRebind({}, dispatch$1, 'on');
+                 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]]);
 
-         uploader.isSaving = function () {
-           return _isSaving;
-         };
+                     if (point && geoVecLength(projection(a.loc), projection(point)) > 20 && geoVecLength(projection(b.loc), projection(point)) > 20) {
+                       loc = point;
+                       break;
+                     }
+                   }
+                 }
 
-         uploader.save = function (changeset, tryAgain, checkConflicts) {
-           // Guard against accidentally entering save code twice - #4641
-           if (_isSaving && !tryAgain) {
-             return;
+                 if (loc) {
+                   midpoints[id] = {
+                     type: 'midpoint',
+                     id: id,
+                     loc: loc,
+                     edge: [a.id, b.id],
+                     parents: [entity]
+                   };
+                 }
+               }
+             }
            }
 
-           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.
+           function midpointFilter(d) {
+             if (midpoints[d.id]) return true;
 
-           if (!osm.authenticated()) {
-             osm.authenticate(function (err) {
-               if (!err) {
-                 uploader.save(changeset, tryAgain, checkConflicts); // continue where we left off..
+             for (var i = 0; i < d.parents.length; i++) {
+               if (filter(d.parents[i])) {
+                 return true;
                }
-             });
-             return;
-           }
+             }
 
-           if (!_isSaving) {
-             _isSaving = true;
-             dispatch$1.call('saveStarted', this);
+             return false;
            }
 
-           var history = context.history();
-           _conflicts = [];
-           _errors = []; // Store original changes, in case user wants to download them as an .osc file
-
-           _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 (!tryAgain) {
-             history.perform(actionNoop());
-           } // Attempt a fast upload.. If there are conflicts, re-enter with `checkConflicts = true`
+           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..
 
-           if (!checkConflicts) {
-             upload(changeset); // Do the full (slow) conflict check..
-           } else {
-             performFullConflictCheck(changeset);
-           }
-         };
+           touchLayer.call(drawTargets, graph, Object.values(midpoints), midpointFilter);
+         }
 
-         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 drawMidpoints;
+       }
 
-           for (var i = 0; i < summary.length; i++) {
-             var item = summary[i];
+       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');
+         }
 
-             if (item.changeType === 'modified') {
-               _toCheck.push(item.entity.id);
-             }
-           }
+         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 _toLoad = withChildNodes(_toCheck, localGraph);
 
-           var _loaded = {};
-           var _toLoadCount = 0;
-           var _toLoadTotal = _toLoad.length;
+         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);
+         }
 
-           if (_toCheck.length) {
-             dispatch$1.call('progressChanged', this, _toLoadCount, _toLoadTotal);
+         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
 
-             _toLoad.forEach(function (id) {
-               _loaded[id] = false;
+             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
 
-             osm.loadMultiple(_toLoad, loaded);
-           } else {
-             upload(changeset);
-           }
-
-           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..
+           targets.exit().remove(); // enter/update
 
+           targets.enter().append('rect').attr('x', -10).attr('y', -26).attr('width', 20).attr('height', 30).merge(targets).attr('class', function (d) {
+             return 'node point target ' + fillClass + d.id;
+           }).attr('transform', getTransform);
+         }
 
-           function loaded(err, result) {
-             if (_errors.length) return;
+         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..
 
-             if (err) {
-               _errors.push({
-                 msg: err.message || err.responseText,
-                 details: [_t('save.status_code', {
-                   code: err.status
-                 })]
-               });
+           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..
 
-               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..
 
-                 var i, id;
+           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..
 
-                 if (entity.type === 'way') {
-                   for (i = 0; i < entity.nodes.length; i++) {
-                     id = entity.nodes[i];
+           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
 
-                     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;
+           groups.select('.stroke'); // propagate bound data
 
-                     if (_loaded[id] === undefined) {
-                       _loaded[id] = false;
-                       loadMore.push(id);
-                     }
-                   }
-                 }
-               });
-               _toLoadCount += result.data.length;
-               _toLoadTotal += loadMore.length;
-               dispatch$1.call('progressChanged', this, _toLoadCount, _toLoadTotal);
+           groups.select('.icon') // propagate bound data
+           .attr('xlink:href', function (entity) {
+             var preset = _mainPresetIndex.match(entity, graph);
+             var picon = preset && preset.icon;
 
-               if (loadMore.length) {
-                 _toLoad.push.apply(_toLoad, loadMore);
+             if (!picon) {
+               return '';
+             } else {
+               var isMaki = /^maki-/.test(picon);
+               return '#' + picon + (isMaki ? '-11' : '');
+             }
+           }); // Draw touch targets..
 
-                 osm.loadMultiple(loadMore, loaded);
-               }
+           touchLayer.call(drawTargets, graph, points, filter);
+         }
 
-               if (!_toLoad.length) {
-                 detectConflicts();
-                 upload(changeset);
-               }
-             }
-           }
+         return drawPoints;
+       }
 
-           function detectConflicts() {
-             function choice(id, text, _action) {
-               return {
-                 id: id,
-                 text: text,
-                 action: function action() {
-                   history.replace(_action);
-                 }
-               };
-             }
+       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 formatUser(d) {
-               return '<a href="' + osm.userURL(d) + '" target="_blank">' + d + '</a>';
-             }
+         function drawTurns(selection, graph, turns) {
+           function turnTransform(d) {
+             var pxRadius = 50;
+             var toWay = graph.entity(d.to.way);
+             var toPoints = graph.childNodes(toWay).map(function (n) {
+               return n.loc;
+             }).map(projection);
+             var toLength = geoPathLength(toPoints);
+             var mid = toLength / 2; // midpoint of destination way
 
-             function entityName(entity) {
-               return utilDisplayName(entity) || utilDisplayType(entity.id) + ' ' + entity.id;
-             }
+             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
 
-             function sameVersions(local, remote) {
-               if (local.version !== remote.version) return false;
+             return 'translate(' + (r * Math.cos(a) + o[0]) + ',' + (r * Math.sin(a) + o[1]) + ') ' + 'rotate(' + a * 180 / Math.PI + ')';
+           }
 
-               if (local.type === 'way') {
-                 var children = utilArrayUnion(local.nodes, remote.nodes);
+           var drawLayer = selection.selectAll('.layer-osm.points .points-group.turns');
+           var touchLayer = selection.selectAll('.layer-touch.turns'); // Draw turns..
 
-                 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;
-                 }
-               }
+           var groups = drawLayer.selectAll('g.turn').data(turns, function (d) {
+             return d.key;
+           }); // exit
 
-               return true;
-             }
+           groups.exit().remove(); // enter
 
-             _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 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
 
-               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'));
+           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
 
-               _conflicts.push({
-                 id: id,
-                 name: entityName(local),
-                 details: mergeConflicts,
-                 chosen: 1,
-                 choices: [choice(id, keepMine, forceLocal), choice(id, keepTheirs, forceRemote)]
-               });
-             });
-           }
-         }
+           groups.select('circle'); // propagate bound data
+           // Draw touch targets..
 
-         function upload(changeset) {
-           var osm = context.connection();
+           var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+           groups = touchLayer.selectAll('g.turn').data(turns, function (d) {
+             return d.key;
+           }); // exit
 
-           if (!osm) {
-             _errors.push({
-               msg: 'No OSM Service'
-             });
-           }
+           groups.exit().remove(); // enter
 
-           if (_conflicts.length) {
-             didResultInConflicts(changeset);
-           } else if (_errors.length) {
-             didResultInErrors();
-           } else {
-             var history = context.history();
-             var changes = history.changes(actionDiscardTags(history.difference(), _discardTags));
+           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
 
-             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();
-             }
-           }
-         }
+           groups = groups.merge(groupsEnter).attr('transform', turnTransform);
+           groups.select('rect'); // propagate bound data
 
-         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
-                 })]
-               });
+           groups.select('circle'); // propagate bound data
 
-               didResultInErrors();
-             }
-           } else {
-             didResultInSuccess(changeset);
-           }
+           return this;
          }
 
-         function didResultInNoChanges() {
-           dispatch$1.call('resultNoChanges', this);
-           endSave();
-           context.flush(); // reset iD
-         }
+         return drawTurns;
+       }
 
-         function didResultInErrors() {
-           context.history().pop();
-           dispatch$1.call('resultErrors', this, _errors);
-           endSave();
-         }
+       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 didResultInConflicts(changeset) {
-           _conflicts.sort(function (a, b) {
-             return b.id.localeCompare(a.id);
-           });
+         var _currHoverTarget;
 
-           dispatch$1.call('resultConflicts', this, changeset, _conflicts, _origChanges);
-           endSave();
-         }
+         var _currPersistent = {};
+         var _currHover = {};
+         var _prevHover = {};
+         var _currSelected = {};
+         var _prevSelected = {};
+         var _radii = {};
 
-         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
+         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.
 
-           window.setTimeout(function () {
-             endSave();
-             context.flush(); // reset iD
-           }, 2500);
-         }
 
-         function endSave() {
-           _isSaving = false;
-           dispatch$1.call('saveEnded', this);
+         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);
          }
 
-         uploader.cancelConflictResolution = function () {
-           context.history().pop();
-         };
+         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();
 
-         uploader.processResolvedConflicts = function (changeset) {
-           var history = context.history();
+           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)
 
-           for (var i = 0; i < _conflicts.length; i++) {
-             if (_conflicts[i].chosen === 1) {
-               // user chose "use theirs"
-               var entity = context.hasEntity(_conflicts[i].id);
 
-               if (entity && entity.type === 'way') {
-                 var children = utilArrayUniq(entity.nodes);
+           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;
+           }
 
-                 for (var j = 0; j < children.length; j++) {
-                   history.replace(actionRevert(children[j]));
+           function updateAttributes(selection) {
+             ['shadow', 'stroke', 'fill'].forEach(function (klass) {
+               var rads = radiuses[klass];
+               selection.selectAll('.' + klass).each(function (entity) {
+                 var i = z && getIcon(entity);
+                 var r = rads[i ? 3 : z]; // slightly increase the size of unconnected endpoints #3775
+
+                 if (entity.id !== activeID && entity.isEndpoint(graph) && !entity.isConnected(graph)) {
+                   r += 1.5;
                  }
-               }
 
-               history.replace(actionRevert(_conflicts[i].id));
-             }
+                 if (klass === 'shadow') {
+                   // remember this value, so we don't need to
+                   _radii[entity.id] = r; // recompute it when we draw the touch targets
+                 }
+
+                 select(this).attr('r', r).attr('visibility', i && klass === 'fill' ? 'hidden' : null);
+               });
+             });
            }
 
-           uploader.save(changeset, true, false); // tryAgain = true, checkConflicts = false
-         };
+           vertices.sort(sortY);
+           var groups = selection.selectAll('g.vertex').filter(filter).data(vertices, fastEntityKey); // exit
 
-         uploader.reset = function () {};
+           groups.exit().remove(); // enter
 
-         return uploader;
-       }
+           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.
 
-       var abs$4 = Math.abs;
-       var exp$2 = Math.exp;
-       var E = Math.E;
+           enter.filter(function (d) {
+             return d.hasInterestingTags();
+           }).append('circle').attr('class', 'fill'); // update
 
-       var FORCED$g = fails(function () {
-         return Math.sinh(-2e-17) != -2e-17;
-       });
+           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`.
 
-       // `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 iconUse = groups.selectAll('.icon').data(function data(d) {
+             return zoom >= 17 && getIcon(d) ? [d] : [];
+           }, fastEntityKey); // exit
 
-       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
+           iconUse.exit().remove(); // enter
 
-       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;
-       });
+           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 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);
-       }
+           var dgroups = groups.selectAll('.viewfieldgroup').data(function data(d) {
+             return zoom >= 18 && getDirections(d) ? [d] : [];
+           }, fastEntityKey); // exit
 
-       function vintageRange(vintage) {
-         var s;
+           dgroups.exit().remove(); // enter/update
 
-         if (vintage.start || vintage.end) {
-           s = vintage.start || '?';
+           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
 
-           if (vintage.start !== vintage.end) {
-             s += ' - ' + (vintage.end || '?');
-           }
+           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 + ')';
+           });
          }
 
-         return s;
-       }
+         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
 
-       function rendererBackgroundSource(data) {
-         var source = Object.assign({}, data); // shallow copy
+             var vertexType = svgPassiveVertex(node, graph, activeID);
 
-         var _offset = [0, 0];
-         var _name = source.name;
-         var _description = source.description;
+             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
 
-         var _best = !!source.best;
+           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
 
-         var _template = source.encrypted ? utilAesDecrypt(source.template) : source.template;
+           targets.exit().remove(); // enter/update
 
-         source.tileSize = data.tileSize || 256;
-         source.zoomExtent = data.zoomExtent || [0, 22];
-         source.overzoom = data.overzoom !== false;
+           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
 
-         source.offset = function (val) {
-           if (!arguments.length) return _offset;
-           _offset = val;
-           return source;
-         };
+           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
 
-         source.nudge = function (val, zoomlevel) {
-           _offset[0] += val[0] / Math.pow(2, zoomlevel);
-           _offset[1] += val[1] / Math.pow(2, zoomlevel);
-           return source;
-         };
+           nopes.exit().remove(); // enter/update
 
-         source.name = function () {
-           var id_safe = source.id.replace(/\./g, '<TX_DOT>');
-           return _t('imagery.' + id_safe + '.name', {
-             "default": _name
-           });
-         };
+           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
 
-         source.label = function () {
-           var id_safe = source.id.replace(/\./g, '<TX_DOT>');
-           return _t.html('imagery.' + id_safe + '.name', {
-             "default": _name
-           });
-         };
 
-         source.description = function () {
-           var id_safe = source.id.replace(/\./g, '<TX_DOT>');
-           return _t.html('imagery.' + id_safe + '.description', {
-             "default": _description
-           });
-         };
+         function renderAsVertex(entity, graph, wireframe, zoom) {
+           var geometry = entity.geometry(graph);
+           return geometry === 'vertex' || geometry === 'point' && (wireframe || zoom >= 18 && entity.directions(graph, projection).length);
+         }
 
-         source.best = function () {
-           return _best;
-         };
+         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);
+         }
 
-         source.area = function () {
-           if (!data.polygon) return Number.MAX_VALUE; // worldwide
+         function getSiblingAndChildVertices(ids, graph, wireframe, zoom) {
+           var results = {};
+           var seenIds = {};
 
-           var area = d3_geoArea({
-             type: 'MultiPolygon',
-             coordinates: [data.polygon]
-           });
-           return isNaN(area) ? 0 : area;
-         };
+           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);
 
-         source.imageryUsed = function () {
-           return _name || source.id;
-         };
+             if (!context.features().isHiddenFeature(entity, graph, geometry)) {
+               var i;
 
-         source.template = function (val) {
-           if (!arguments.length) return _template;
+               if (entity.type === 'way') {
+                 for (i = 0; i < entity.nodes.length; i++) {
+                   var child = graph.hasEntity(entity.nodes[i]);
 
-           if (source.id === 'custom') {
-             _template = val;
-           }
+                   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);
 
-           return source;
-         };
+                   if (member) {
+                     addChildVertices(member);
+                   }
+                 }
+               } else if (renderAsVertex(entity, graph, wireframe, zoom)) {
+                 results[entity.id] = entity;
+               }
+             }
+           }
 
-         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)
+           ids.forEach(function (id) {
+             var entity = graph.hasEntity(id);
+             if (!entity) return;
 
-           if (!source.type) {
-             if (/SERVICE=WMS|\{(proj|wkid|bbox)\}/.test(_template)) {
-               source.type = 'wms';
-               source.projection = 'EPSG:3857'; // guess
-             } else if (/\{(x|y)\}/.test(_template)) {
-               source.type = 'tms';
-             } else if (/\{u\}/.test(_template)) {
-               source.type = 'bing';
+             if (entity.type === 'node') {
+               if (renderAsVertex(entity, graph, wireframe, zoom)) {
+                 results[entity.id] = entity;
+                 graph.parentWays(entity).forEach(function (entity) {
+                   addChildVertices(entity);
+                 });
+               }
+             } else {
+               // way, relation
+               addChildVertices(entity);
              }
-           }
+           });
+           return results;
+         }
 
-           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;
-               };
+         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');
 
-               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)));
+           if (fullRedraw) {
+             _currPersistent = {};
+             _radii = {};
+           } // Collect important vertices from the `entities` list..
+           // (during a partial redraw, it will not contain everything)
 
-               switch (source.projection) {
-                 case 'EPSG:4326':
-                   return {
-                     x: lon * 180 / Math.PI,
-                     y: lat * 180 / Math.PI
-                   };
 
-                 default:
-                   // EPSG:3857 and synonyms
-                   var mercCoords = mercatorRaw(lon, lat);
-                   return {
-                     x: 20037508.34 / Math.PI * mercCoords[0],
-                     y: 20037508.34 / Math.PI * mercCoords[1]
-                   };
-               }
-             };
+           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..
 
-             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 (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..
 
-                 case 'proj':
-                   return projection;
 
-                 case 'wkid':
-                   return projection.replace(/^EPSG:/, '');
+             if (!keep && !fullRedraw) {
+               delete _currPersistent[entity.id];
+             }
+           } // 3 sets of vertices to consider:
 
-                 case 'bbox':
-                   // WMS 1.3 flips x/y for some coordinate systems including EPSG:4326 - #7557
-                   if (projection === 'EPSG:4326' && // The CRS parameter implies version 1.3 (prior versions use SRS)
-                   /VERSION=1.3|CRS={proj}/.test(source.template())) {
-                     return maxXminY.y + ',' + minXmaxY.x + ',' + minXmaxY.y + ',' + maxXminY.x;
-                   } else {
-                     return minXmaxY.x + ',' + maxXminY.y + ',' + maxXminY.x + ',' + minXmaxY.y;
-                   }
 
-                 case 'w':
-                   return minXmaxY.x;
+           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)
 
-                 case 's':
-                   return maxXminY.y;
+           };
+           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.
 
-                 case 'n':
-                   return maxXminY.x;
+           var filterRendered = function filterRendered(d) {
+             return d.id in _currPersistent || d.id in _currSelected || d.id in _currHover || filter(d);
+           };
 
-                 case 'e':
-                   return minXmaxY.y;
+           drawLayer.call(draw, graph, currentVisible(all), sets, filterRendered); // Draw touch targets..
+           // When drawing, render all targets (not just those affected by a partial redraw)
 
-                 default:
-                   return token;
-               }
+           var filterTouch = function filterTouch(d) {
+             return isMoving ? true : filterRendered(d);
+           };
+
+           touchLayer.call(drawTargets, graph, currentVisible(all), filterTouch);
+
+           function currentVisible(which) {
+             return Object.keys(which).map(graph.hasEntity, graph) // the current version of this entity
+             .filter(function (entity) {
+               return entity && entity.intersects(extent, graph);
              });
-           } 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 = '';
+           }
+         } // partial redraw - only update the selected items..
 
-               for (var zoom = coord[2]; zoom > 0; zoom--) {
-                 var b = 0;
-                 var mask = 1 << zoom - 1;
-                 if ((coord[0] & mask) !== 0) b++;
-                 if ((coord[1] & mask) !== 0) b += 2;
-                 u += b.toString();
-               }
 
-               return u;
+         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;
+
+               if (entity.type === 'node') {
+                 if (renderAsVertex(entity, graph, wireframe, zoom)) {
+                   _currSelected[entity.id] = entity;
+                 }
+               }
              });
-           } // these apply to any type..
+           } else {
+             _currSelected = getSiblingAndChildVertices(context.selectedIDs(), graph, wireframe, zoom);
+           } // note that drawVertices will add `_currSelected` automatically if needed..
 
 
-           result = result.replace(/\{switch:([^}]+)\}/, function (s, r) {
-             var subdomains = r.split(',');
-             return subdomains[(coord[0] + coord[1]) % subdomains.length];
-           });
-           return result;
-         };
+           var filter = function filter(d) {
+             return d.id in _prevSelected;
+           };
 
-         source.validZoom = function (z) {
-           return source.zoomExtent[0] <= z && (source.overzoom || source.zoomExtent[1] > z);
-         };
+           drawVertices(selection, graph, Object.values(_prevSelected), filter, extent, false);
+         }; // partial redraw - only update the hovered items..
 
-         source.isLocatorOverlay = function () {
-           return source.id === 'mapbox_locator_overlay';
-         };
-         /* hides a source from the list, but leaves it available for use */
 
+         drawVertices.drawHover = function (selection, graph, target, extent) {
+           if (target === _currHoverTarget) return; // continue only if something changed
 
-         source.isHidden = function () {
-           return source.id === 'DigitalGlobe-Premium-vintage' || source.id === 'DigitalGlobe-Standard-vintage';
-         };
+           var wireframe = context.surface().classed('fill-wireframe');
+           var zoom = geoScaleToZoom(projection.scale());
+           _prevHover = _currHover || {};
+           _currHoverTarget = target;
+           var entity = target && target.properties && target.properties.entity;
 
-         source.copyrightNotices = function () {};
+           if (entity) {
+             _currHover = getSiblingAndChildVertices([entity.id], graph, wireframe, zoom);
+           } else {
+             _currHover = {};
+           } // note that drawVertices will add `_currHover` automatically if needed..
 
-         source.getMetadata = function (center, tileCoord, callback) {
-           var vintage = {
-             start: localeDateString(source.startDate),
-             end: localeDateString(source.endDate)
-           };
-           vintage.range = vintageRange(vintage);
-           var metadata = {
-             vintage: vintage
+
+           var filter = function filter(d) {
+             return d.id in _prevHover;
            };
-           callback(null, metadata);
+
+           drawVertices(selection, graph, Object.values(_prevHover), filter, extent, false);
          };
 
-         return source;
+         return drawVertices;
        }
 
-       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
+       function utilBindOnce(target, type, listener, capture) {
+         var typeOnce = type + '.once';
 
-         var key = 'Ak5oTE46TUbjRp08OFVcGpkARErDobfpuyNKa-W2mQ8wbt1K1KL8p1bIRwWwcF-Q'; // iD
+         function one() {
+           target.on(typeOnce, null);
+           listener.apply(this, arguments);
+         }
 
-         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 */
-         });
+         target.on(typeOnce, one, capture);
+         return this;
+       }
 
-         bing.copyrightNotices = function (zoom, extent) {
-           zoom = Math.min(zoom, 21);
-           return providers.filter(function (provider) {
-             return provider.areas.some(function (area) {
-               return extent.intersects(area.extent) && area.zoom[0] <= zoom && area.zoom[1] >= zoom;
-             });
-           }).map(function (provider) {
-             return provider.attribution;
-           }).join(', ');
-         };
+       function defaultFilter(d3_event) {
+         return !d3_event.ctrlKey && !d3_event.button;
+       }
 
-         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
+       function defaultExtent() {
+         var e = this;
 
-           var url = 'https://dev.virtualearth.net/REST/v1/Imagery/Metadata/Aerial/' + centerPoint + '?zl=' + zoom + '&key=' + key;
-           if (inflight[tileID]) return;
+         if (e instanceof SVGElement) {
+           e = e.ownerSVGElement || e;
 
-           if (!cache[tileID]) {
-             cache[tileID] = {};
+           if (e.hasAttribute('viewBox')) {
+             e = e.viewBox.baseVal;
+             return [[e.x, e.y], [e.x + e.width, e.y + e.height]];
            }
 
-           if (cache[tileID] && cache[tileID].metadata) {
-             return callback(null, cache[tileID].metadata);
-           }
+           return [[0, 0], [e.width.baseVal.value, e.height.baseVal.value]];
+         }
 
-           inflight[tileID] = true;
-           d3_json(url).then(function (result) {
-             delete inflight[tileID];
+         return [[0, 0], [e.clientWidth, e.clientHeight]];
+       }
 
-             if (!result) {
-               throw new Error('Unknown Error');
-             }
+       function defaultWheelDelta(d3_event) {
+         return -d3_event.deltaY * (d3_event.deltaMode === 1 ? 0.05 : d3_event.deltaMode ? 1 : 0.002);
+       }
 
-             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);
-           });
-         };
+       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));
+       }
 
-         bing.terms_url = 'https://blog.openstreetmap.org/2010/11/30/microsoft-imagery-details';
-         return bing;
-       };
+       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;
 
-       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';
+         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);
          }
 
-         var esri = rendererBackgroundSource(data);
-         var cache = {};
-         var inflight = {};
-
-         var _prevCenter; // use a tilemap service to set maximum zoom for esri tiles dynamically
-         // https://developers.arcgis.com/documentation/tiled-elevation-service/
+         zoom.transform = function (collection, transform, point) {
+           var selection = collection.selection ? collection.selection() : collection;
 
+           if (collection !== selection) {
+             schedule(collection, transform, point);
+           } else {
+             selection.interrupt().each(function () {
+               gesture(this, arguments).start(null).zoom(null, null, typeof transform === 'function' ? transform.apply(this, arguments) : transform).end(null);
+             });
+           }
+         };
 
-         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
+         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);
+         };
 
-           var z = 20; // first generate a random url using the template
+         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);
+         };
 
-           var dummyUrl = esri.url([1, 2, 3]); // calculate url z/y/x from the lat/long of the center of the map
+         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);
+           });
+         };
 
-           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
+         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);
+         };
 
-           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
+         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);
+         }
 
-           d3_json(tilemapUrl).then(function (tilemap) {
-             if (!tilemap) {
-               throw new Error('Unknown Error');
-             }
+         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 hasTiles = true;
+         function centroid(extent) {
+           return [(+extent[0][0] + +extent[1][0]) / 2, (+extent[0][1] + +extent[1][1]) / 2];
+         }
 
-             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;
+         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 any tiles are missing at level 20 we restrict maxZoom to 19
 
-
-             esri.zoomExtent[1] = hasTiles ? 22 : 19;
-           })["catch"](function () {
-             /* ignore */
+               g.zoom(null, null, t);
+             };
            });
-         };
-
-         esri.getMetadata = function (center, tileCoord, callback) {
-           var tileID = tileCoord.slice(0, 3).join('/');
-           var zoom = Math.min(tileCoord[2], esri.zoomExtent[1]);
-           var centerPoint = center[0] + ',' + center[1]; // long, lat (as it should be)
-
-           var unknown = _t('info_panels.background.unknown');
-           var metadataLayer;
-           var vintage = {};
-           var metadata = {};
-           if (inflight[tileID]) return;
+         }
 
-           switch (true) {
-             case zoom >= 20 && esri.id === 'EsriWorldImageryClarity':
-               metadataLayer = 4;
-               break;
+         function gesture(that, args, clean) {
+           return !clean && _activeGesture || new Gesture(that, args);
+         }
 
-             case zoom >= 19:
-               metadataLayer = 3;
-               break;
+         function Gesture(that, args) {
+           this.that = that;
+           this.args = args;
+           this.active = 0;
+           this.extent = extent.apply(that, args);
+         }
 
-             case zoom >= 17:
-               metadataLayer = 2;
-               break;
+         Gesture.prototype = {
+           start: function start(d3_event) {
+             if (++this.active === 1) {
+               _activeGesture = this;
+               dispatch.call('start', this, d3_event);
+             }
 
-             case zoom >= 13:
-               metadataLayer = 0;
-               break;
+             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);
+             }
 
-             default:
-               metadataLayer = 99;
+             return this;
            }
+         };
 
-           var url; // build up query using the layer appropriate to the current zoom
-
-           if (esri.id === 'EsriWorldImagery') {
-             url = 'https://services.arcgisonline.com/arcgis/rest/services/World_Imagery/MapServer/';
-           } else if (esri.id === 'EsriWorldImageryClarity') {
-             url = 'https://serviceslab.arcgisonline.com/arcgis/rest/services/Clarity_World_Imagery/MapServer/';
-           }
+         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.
 
-           url += metadataLayer + '/query?returnGeometry=false&geometry=' + centerPoint + '&inSR=4326&geometryType=esriGeometryPoint&outFields=*&f=json';
+           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 (!cache[tileID]) {
-             cache[tileID] = {};
+             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);
            }
 
-           if (cache[tileID] && cache[tileID].metadata) {
-             return callback(null, cache[tileID].metadata);
-           } // accurate metadata is only available >= 13
+           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);
+           }
+         }
 
-           if (metadataLayer === 99) {
-             vintage = {
-               start: null,
-               end: null,
-               range: null
-             };
-             metadata = {
-               vintage: null,
-               source: unknown,
-               description: unknown,
-               resolution: unknown,
-               accuracy: unknown
-             };
-             callback(null, metadata);
-           } else {
-             inflight[tileID] = true;
-             d3_json(url).then(function (result) {
-               delete inflight[tileID];
+         var _downPointerIDs = new Set();
 
-               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 _pointerLocGetter;
 
+         function pointerdown(d3_event) {
+           _downPointerIDs.add(d3_event.pointerId);
 
-               var captureDate = localeDateString(result.features[0].attributes.SRC_DATE2);
-               vintage = {
-                 start: captureDate,
-                 end: captureDate,
-                 range: captureDate
-               };
-               metadata = {
-                 vintage: vintage,
-                 source: clean(result.features[0].attributes.NICE_NAME),
-                 description: clean(result.features[0].attributes.NICE_DESC),
-                 resolution: clean(+parseFloat(result.features[0].attributes.SRC_RES).toFixed(4)),
-                 accuracy: clean(+parseFloat(result.features[0].attributes.SRC_ACC).toFixed(4))
-               }; // append units - meters
+           if (!filter.apply(this, arguments)) return;
+           var g = gesture(this, arguments, _downPointerIDs.size === 1);
+           var started;
+           d3_event.stopImmediatePropagation();
+           _pointerLocGetter = utilFastMouse(this);
 
-               if (isFinite(metadata.resolution)) {
-                 metadata.resolution += ' m';
-               }
+           var loc = _pointerLocGetter(d3_event);
 
-               if (isFinite(metadata.accuracy)) {
-                 metadata.accuracy += ' m';
-               }
+           var p = [loc, _transform.invert(loc), d3_event.pointerId];
 
-               cache[tileID].metadata = metadata;
-               if (callback) callback(null, metadata);
-             })["catch"](function (err) {
-               delete inflight[tileID];
-               if (callback) callback(err.message);
-             });
+           if (!g.pointer0) {
+             g.pointer0 = p;
+             started = true;
+           } else if (!g.pointer1 && g.pointer0[2] !== p[2]) {
+             g.pointer1 = p;
            }
 
-           function clean(val) {
-             return String(val).trim() || unknown;
+           if (started) {
+             interrupt(this);
+             g.start(d3_event);
            }
-         };
+         }
 
-         return esri;
-       };
+         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;
 
-       rendererBackgroundSource.None = function () {
-         var source = rendererBackgroundSource({
-           id: 'none',
-           template: ''
-         });
+           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;
+           }
 
-         source.name = function () {
-           return _t('background.none');
-         };
+           d3_event.preventDefault();
+           d3_event.stopImmediatePropagation();
 
-         source.label = function () {
-           return _t.html('background.none');
-         };
+           var loc = _pointerLocGetter(d3_event);
 
-         source.imageryUsed = function () {
-           return null;
-         };
+           var t, p, l;
+           if (isPointer0) g.pointer0[0] = loc;else if (isPointer1) g.pointer1[0] = loc;
+           t = _transform;
 
-         source.area = function () {
-           return -1; // sources in background pane are sorted by area
-         };
+           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;
+           }
 
-         return source;
-       };
+           g.zoom(d3_event, 'touch', constrain(translate(t, p, l), g.extent, translateExtent));
+         }
 
-       rendererBackgroundSource.Custom = function (template) {
-         var source = rendererBackgroundSource({
-           id: 'custom',
-           template: template
-         });
+         function pointerup(d3_event) {
+           if (!_downPointerIDs.has(d3_event.pointerId)) return;
 
-         source.name = function () {
-           return _t('background.custom');
-         };
+           _downPointerIDs["delete"](d3_event.pointerId);
 
-         source.label = function () {
-           return _t.html('background.custom');
-         };
+           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;
 
-         source.imageryUsed = function () {
-           // sanitize personal connection tokens - #6801
-           var cleaned = source.template(); // from query string parameters
+           if (g.pointer1 && !g.pointer0) {
+             g.pointer0 = g.pointer1;
+             delete g.pointer1;
+           }
 
-           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
+           if (g.pointer0) {
+             g.pointer0[1] = _transform.invert(g.pointer0[0]);
+           } else {
+             g.end(d3_event);
+           }
+         }
 
+         zoom.wheelDelta = function (_) {
+           return arguments.length ? (wheelDelta = utilFunctor(+_), zoom) : wheelDelta;
+         };
 
-           cleaned = cleaned.replace(/token\/(\w+)/, 'token/{apikey}');
-           return 'Custom (' + cleaned + ' )';
+         zoom.filter = function (_) {
+           return arguments.length ? (filter = utilFunctor(!!_), zoom) : filter;
          };
 
-         source.area = function () {
-           return -2; // sources in background pane are sorted by area
+         zoom.extent = function (_) {
+           return arguments.length ? (extent = utilFunctor([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), zoom) : extent;
          };
 
-         return source;
-       };
+         zoom.scaleExtent = function (_) {
+           return arguments.length ? (scaleExtent[0] = +_[0], scaleExtent[1] = +_[1], zoom) : [scaleExtent[0], scaleExtent[1]];
+         };
 
-       function rendererTileLayer(context) {
-         var transformProp = utilPrefixCSSProperty('Transform');
-         var tiler = utilTiler();
-         var _tileSize = 256;
+         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]]];
+         };
 
-         var _projection;
+         zoom.constrain = function (_) {
+           return arguments.length ? (constrain = _, zoom) : constrain;
+         };
 
-         var _cache = {};
+         zoom.interpolate = function (_) {
+           return arguments.length ? (interpolate = _, zoom) : interpolate;
+         };
 
-         var _tileOrigin;
+         zoom._transform = function (_) {
+           return arguments.length ? (_transform = _, zoom) : _transform;
+         };
 
-         var _zoom;
+         return utilRebind(zoom, dispatch, 'on');
+       }
 
-         var _source;
+       // if pointer events are supported. Falls back to default `dblclick` event.
 
-         function tileSizeAtZoom(d, z) {
-           var EPSILON = 0.002; // close seams
+       function utilDoubleUp() {
+         var dispatch = dispatch$8('doubleUp');
+         var _maxTimespan = 500; // milliseconds
 
-           return _tileSize * Math.pow(2, z - d[2]) / _tileSize + EPSILON;
-         }
+         var _maxDistance = 20; // web pixels; be somewhat generous to account for touch devices
 
-         function atZoom(t, distance) {
-           var power = Math.pow(2, distance);
-           return [Math.floor(t[0] * power), Math.floor(t[1] * power), t[2] + distance];
-         }
+         var _pointer; // object representing the pointer that could trigger double up
 
-         function lookUp(d) {
-           for (var up = -1; up > -d[2]; up--) {
-             var tile = atZoom(d, up);
 
-             if (_cache[_source.url(tile)] !== false) {
-               return tile;
-             }
-           }
+         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;
          }
 
-         function uniqueBy(a, n) {
-           var o = [];
-           var seen = {};
+         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
 
-           for (var i = 0; i < a.length; i++) {
-             if (seen[a[i][n]] === undefined) {
-               o.push(a[i]);
-               seen[a[i][n]] = true;
-             }
+           if (_pointer && !pointerIsValidFor(loc)) {
+             // if this pointer is no longer valid, clear it so another can be started
+             _pointer = undefined;
            }
 
-           return o;
-         }
-
-         function addSource(d) {
-           d.push(_source.url(d));
-           return d;
-         } // Update tiles based on current state of `projection`.
-
-
-         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)];
+           if (!_pointer) {
+             _pointer = {
+               startLoc: loc,
+               startTime: new Date().getTime(),
+               upCount: 0,
+               pointerId: d3_event.pointerId
+             };
            } else {
-             pixelOffset = [0, 0];
+             // double down
+             _pointer.pointerId = d3_event.pointerId;
            }
+         }
 
-           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 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 (_pointer.upCount === 2) {
+             // double up!
+             var loc = [d3_event.clientX, d3_event.clientY];
 
-         function render(selection) {
-           if (!_source) return;
-           var requests = [];
-           var showDebug = context.getDebug('tile') && !_source.overlay;
+             if (pointerIsValidFor(loc)) {
+               var locInThis = utilFastMouse(this)(d3_event);
+               dispatch.call('doubleUp', this, d3_event, locInThis);
+             } // clear the pointer info in any case
 
-           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
 
-               requests.push(d);
+             _pointer = undefined;
+           }
+         }
 
-               if (_cache[d[3]] === false && lookUp(d)) {
-                 requests.push(addSource(lookUp(d)));
-               }
-             });
-             requests = uniqueBy(requests, 3).filter(function (r) {
-               // don't re-request tiles which have failed in the past
-               return _cache[r[3]] !== false;
+         function 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));
              });
            }
+         }
 
-           function load(d3_event, d) {
-             _cache[d[3]] = true;
-             select(this).on('error', null).on('load', null).classed('tile-loaded', true);
-             render(selection);
-           }
+         doubleUp.off = function (selection) {
+           selection.on('pointerdown.doubleUp', null).on('pointerup.doubleUp', null).on('dblclick.doubleUp', null);
+         };
 
-           function error(d3_event, d) {
-             _cache[d[3]] = false;
-             select(this).on('error', null).on('load', null).remove();
-             render(selection);
-           }
+         return utilRebind(doubleUp, dispatch, 'on');
+       }
 
-           function imageTransform(d) {
-             var ts = _tileSize * Math.pow(2, _zoom - d[2]);
+       var TILESIZE = 256;
+       var minZoom = 2;
+       var maxZoom = 24;
+       var kMin = geoZoomToScale(minZoom, TILESIZE);
+       var kMax = geoZoomToScale(maxZoom, TILESIZE);
 
-             var scale = tileSizeAtZoom(d, _zoom);
-             return 'translate(' + (d[0] * ts - _tileOrigin[0]) + 'px,' + (d[1] * ts - _tileOrigin[1]) + 'px) ' + 'scale(' + scale + ',' + scale + ')';
-           }
+       function clamp$1(num, min, max) {
+         return Math.max(min, Math.min(num, max));
+       }
 
-           function tileCenter(d) {
-             var ts = _tileSize * Math.pow(2, _zoom - d[2]);
+       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;
 
-             return [d[0] * ts - _tileOrigin[0] + ts / 2, d[1] * ts - _tileOrigin[1] + ts / 2];
-           }
+         var _selection = select(null);
 
-           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)
+         var supersurface = select(null);
+         var wrapper = select(null);
+         var surface = select(null);
+         var _dimensions = [1, 1];
+         var _dblClickZoomEnabled = true;
+         var _redrawEnabled = true;
 
+         var _gestureTransformStart;
 
-           var 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);
+         var _transformStart = projection.transform();
 
-             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();
+         var _transformLast;
 
-           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));
+         var _isTransformed = false;
+         var _minzoom = 0;
 
-               _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'));
-               });
-             });
-           }
-         }
+         var _getMouseCoords;
 
-         background.projection = function (val) {
-           if (!arguments.length) return _projection;
-           _projection = val;
-           return background;
-         };
+         var _lastPointerEvent;
 
-         background.dimensions = function (val) {
-           if (!arguments.length) return tiler.size();
-           tiler.size(val);
-           return background;
-         };
+         var _lastWithinEditableZoom; // whether a pointerdown event started the zoom
 
-         background.source = function (val) {
-           if (!arguments.length) return _source;
-           _source = val;
-           _tileSize = _source.tileSize;
-           _cache = {};
-           tiler.tileSize(_source.tileSize).zoomExtent(_source.zoomExtent);
-           return background;
-         };
 
-         return background;
-       }
+         var _pointerDown = false; // use pointer events on supported platforms; fallback to mouse events
 
-       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;
+         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse'; // use pointer event interaction if supported; fallback to touch/mouse events in d3-zoom
 
-         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
 
-             var features = sources.map(function (source) {
-               if (!source.polygon) return null; // workaround for editor-layer-index weirdness..
-               // Add an extra array nest to each element in `source.polygon`
-               // so the rings are not treated as a bunch of holes:
-               // what we have: [ [[outer],[hole],[hole]] ]
-               // what we want: [ [[outer]],[[outer]],[[outer]] ]
+         var _zoomerPannerFunction = 'PointerEvent' in window ? utilZoomPan : d3_zoom;
 
-               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
+         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;
+         });
 
-             _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'
+         var _doubleUpHandler = utilDoubleUp();
 
-             _imageryIndex.backgrounds.unshift(rendererBackgroundSource.None()); // Add 'Custom'
+         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 template = corePreferences('background-custom-template') || '';
-             var custom = rendererBackgroundSource.Custom(template);
+         function cancelPendingRedraw() {
+           scheduleRedraw.cancel(); // isRedrawScheduled = false;
+           // window.cancelIdleCallback(pendingRedrawCall);
+         }
 
-             _imageryIndex.backgrounds.unshift(custom);
+         function map(selection) {
+           _selection = selection;
+           context.on('change.map', immediateRedraw);
+           var osm = context.connection();
 
-             return _imageryIndex;
-           });
-         }
+           if (osm) {
+             osm.on('change.map', immediateRedraw);
+           }
 
-         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
+           function didUndoOrRedo(targetTransform) {
+             var mode = context.mode().id;
+             if (mode !== 'browse' && mode !== 'select') return;
 
-           if (context.map().zoom() > 18) {
-             if (currSource && /^EsriWorldImagery/.test(currSource.id)) {
-               var center = context.map().center();
-               currSource.fetchTilemap(center);
+             if (targetTransform) {
+               map.transformEase(targetTransform);
              }
-           } // Is the imagery valid here? - #4827
-
+           }
 
-           var sources = background.sources(context.map().extent());
-           var wasValid = _isValid;
-           _isValid = !!sources.filter(function (d) {
-             return d === currSource;
-           }).length;
+           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
 
-           if (wasValid !== _isValid) {
-             // change in valid status
-             background.updateImagery();
-           }
+           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
 
-           var baseFilter = '';
+           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 (detected.cssfilters) {
-             if (_brightness !== 1) {
-               baseFilter += " brightness(".concat(_brightness, ")");
+             if (d3_event.button === 2) {
+               d3_event.stopPropagation();
              }
+           }, true).on(_pointerPrefix + 'up.zoom', function (d3_event) {
+             _lastPointerEvent = d3_event;
 
-             if (_contrast !== 1) {
-               baseFilter += " contrast(".concat(_contrast, ")");
+             if (resetTransform()) {
+               immediateRedraw();
              }
-
-             if (_saturation !== 1) {
-               baseFilter += " saturate(".concat(_saturation, ")");
+           }).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
+               });
              }
-
-             if (_sharpness < 1) {
-               // gaussian blur
-               var blur = d3_interpolateNumber(0.5, 5)(1 - _sharpness);
-               baseFilter += " blur(".concat(blur, "px)");
+           }).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 base = selection.selectAll('.layer-background').data([0]);
-           base = base.enter().insert('div', '.layer-data').attr('class', 'layer layer-background').merge(base);
+           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
 
-           if (detected.cssfilters) {
-             base.style('filter', baseFilter || null);
-           } else {
-             base.style('opacity', _brightness);
-           }
 
-           var imagery = base.selectAll('.layer-imagery').data([0]);
-           imagery.enter().append('div').attr('class', 'layer layer-imagery').merge(imagery).call(baseLayer);
-           var maskFilter = '';
-           var mixBlendMode = '';
+           updateAreaFill();
 
-           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, ")");
-           }
+           _doubleUpHandler.on('doubleUp.map', function (d3_event, p0) {
+             if (!_dblClickZoomEnabled) return; // don't zoom if targeting something other than the map itself
 
-           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);
+             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);
            });
-         }
-
-         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(',');
 
-           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;
+           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.
 
-           if (id === 'custom') {
-             id = "custom:".concat(currSource.template());
-           }
+             var graph = context.graph();
+             var selectedAndParents = {};
+             context.selectedIDs().forEach(function (id) {
+               var entity = graph.hasEntity(id);
 
-           if (id) {
-             hash.background = id;
-           } else {
-             delete hash.background;
-           }
+               if (entity) {
+                 selectedAndParents[entity.id] = entity;
 
-           if (o) {
-             hash.overlays = o;
-           } else {
-             delete hash.overlays;
-           }
+                 if (entity.type === 'node') {
+                   graph.parentWays(entity).forEach(function (parent) {
+                     selectedAndParents[parent.id] = parent;
+                   });
+                 }
+               }
+             });
+             var data = Object.values(selectedAndParents);
 
-           if (Math.abs(x) > EPSILON || Math.abs(y) > EPSILON) {
-             hash.offset = "".concat(x, ",").concat(y);
-           } else {
-             delete hash.offset;
-           }
+             var filter = function filter(d) {
+               return d.id in selectedAndParents;
+             };
 
-           if (!window.mocha) {
-             window.location.replace('#' + utilQsString(hash, true));
-           }
+             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
 
-           var imageryUsed = [];
-           var photoOverlaysUsed = [];
-           var currUsed = currSource.imageryUsed();
+             scheduleRedraw();
+           });
+           map.dimensions(utilGetDimensions(selection));
+         }
 
-           if (currUsed && _isValid) {
-             imageryUsed.push(currUsed);
-           }
+         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;
 
-           _overlayLayers.filter(function (d) {
-             return !d.source().isLocatorOverlay() && !d.source().isHidden();
-           }).forEach(function (d) {
-             return imageryUsed.push(d.source().imageryUsed());
-           });
+             for (var i = 0; i < listeners.length; i++) {
+               var listener = listeners[i];
 
-           var dataLayer = context.layers().layer('data');
+               if (listener.name === 'zoom' && listener.type === 'mouseup') {
+                 hasOrphan = true;
+                 break;
+               }
+             }
 
-           if (dataLayer && dataLayer.enabled() && dataLayer.hasData()) {
-             imageryUsed.push(dataLayer.getSrc());
-           }
+             if (hasOrphan) {
+               var event = window.CustomEvent;
 
-           var photoOverlayLayers = {
-             streetside: 'Bing Streetside',
-             mapillary: 'Mapillary Images',
-             'mapillary-map-features': 'Mapillary Map Features',
-             'mapillary-signs': 'Mapillary Signs',
-             openstreetcam: 'OpenStreetCam Images'
-           };
+               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.
 
-           for (var layerID in photoOverlayLayers) {
-             var layer = context.layers().layer(layerID);
 
-             if (layer && layer.enabled()) {
-               photoOverlaysUsed.push(layerID);
-               imageryUsed.push(photoOverlayLayers[layerID]);
+               event.view = window;
+               window.dispatchEvent(event);
              }
            }
 
-           context.history().imageryUsed(imageryUsed);
-           context.history().photoOverlaysUsed(photoOverlaysUsed);
-         };
-
-         var _checkedBlocklists;
+           return d3_event.button !== 2; // ignore right clicks
+         }
 
-         background.sources = function (extent, zoom, includeCurrent) {
-           if (!_imageryIndex) return []; // called before init()?
+         function pxCenter() {
+           return [_dimensions[0] / 2, _dimensions[1] / 2];
+         }
 
-           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();
+         function drawEditable(difference, extent) {
+           var mode = context.mode();
+           var graph = context.graph();
+           var features = context.features();
+           var all = context.history().intersects(map.extent());
+           var fullRedraw = false;
+           var data;
+           var set;
+           var filter;
+           var applyFeatureLayerFilters = true;
 
-           if (blocklists && blocklists !== _checkedBlocklists) {
-             _imageryIndex.backgrounds.forEach(function (source) {
-               source.isBlocked = blocklists.some(function (blocklist) {
-                 return blocklist.test(source.template());
-               });
+           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
 
-             _checkedBlocklists = blocklists;
-           }
+             applyFeatureLayerFilters = false;
+           } else if (difference) {
+             var complete = difference.complete(map.extent());
+             data = Object.values(complete).filter(Boolean);
+             set = new Set(Object.keys(complete));
 
-           return _imageryIndex.backgrounds.filter(function (source) {
-             if (includeCurrent && currSource === source) return true; // optionally always include the current imagery
+             filter = function filter(d) {
+               return set.has(d.id);
+             };
 
-             if (source.isBlocked) return false; // even bundled sources may be blocked - #7905
+             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 (!source.polygon) return true; // always include imagery with worldwide coverage
+             if (extent) {
+               data = context.history().intersects(map.extent().intersection(extent));
+               set = new Set(data.map(function (entity) {
+                 return entity.id;
+               }));
 
-             if (zoom && zoom < 6) return false; // optionally exclude local imagery at low zooms
+               filter = function filter(d) {
+                 return set.has(d.id);
+               };
+             } else {
+               data = all;
+               fullRedraw = true;
+               filter = utilFunctor(true);
+             }
+           }
 
-             return visible[source.id]; // include imagery visible in given extent
-           });
-         };
+           if (applyFeatureLayerFilters) {
+             data = features.filter(data, graph);
+           } else {
+             context.features().resetStats();
+           }
 
-         background.dimensions = function (val) {
-           if (!val) return;
-           baseLayer.dimensions(val);
+           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());
+           }
 
-           _overlayLayers.forEach(function (layer) {
-             return layer.dimensions(val);
+           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);
          };
 
-         background.baseLayerSource = function (d) {
-           if (!arguments.length) return baseLayer.source(); // test source against OSM imagery blocklists..
+         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();
 
-           var osm = context.connection();
-           if (!osm) return background;
-           var blocklists = osm.imageryBlocklists();
-           var template = d.template();
-           var fail = false;
-           var tested = 0;
-           var regex;
+           if (mode && !allowed[mode.id]) {
+             context.enter(modeBrowse(context));
+           }
 
-           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.
+           dispatch.call('drawn', this, {
+             full: true
+           });
+         }
 
+         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
 
-           if (!tested) {
-             regex = /.*\.google(apis)?\..*\/(vt|kh)[\?\/].*([xyz]=.*){3}.*/;
-             fail = regex.test(template);
-           }
+           e2._rotation = e.rotation; // preserve the original rotation
 
-           baseLayer.source(!fail ? d : background.findSource('none'));
-           dispatch$1.call('change');
-           background.updateImagery();
-           return background;
-         };
+           _selection.node().dispatchEvent(e2);
+         }
 
-         background.findSource = function (id) {
-           if (!id || !_imageryIndex) return null; // called before init()?
+         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 _imageryIndex.backgrounds.find(function (d) {
-             return d.id && d.id === id;
-           });
-         };
+           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
 
-         background.bing = function () {
-           background.baseLayerSource(background.findSource('Bing'));
-         };
+             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
 
-         background.showsLayer = function (d) {
-           var currSource = baseLayer.source();
-           if (!d || !currSource) return false;
-           return d.id === currSource.id || _overlayLayers.some(function (layer) {
-             return d.id === layer.source().id;
-           });
-         };
+                 if (detected.os !== 'mac') {
+                   dY *= 5;
+                 } // recalculate x2,y2,k2
 
-         background.overlayLayerSources = function () {
-           return _overlayLayers.map(function (layer) {
-             return layer.source();
-           });
-         };
 
-         background.toggleOverlayLayer = function (d) {
-           var layer;
+                 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
 
-           for (var i = 0; i < _overlayLayers.length; i++) {
-             layer = _overlayLayers[i];
+               t0 = _isTransformed ? _transformLast : _transformStart;
+               p0 = _getMouseCoords(source);
+               p1 = t0.invert(p0);
+               k2 = t0.k * Math.pow(2, -dY / 500);
+               k2 = clamp$1(k2, kMin, kMax);
+               x2 = p0[0] - p1[0] * k2;
+               y2 = p0[1] - p1[1] * k2; // Trackpad scroll zooming with shift or alt/option key down
+             } else if ((source.altKey || source.shiftKey) && isInteger(dY)) {
+               // recalculate x2,y2,k2
+               t0 = _isTransformed ? _transformLast : _transformStart;
+               p0 = _getMouseCoords(source);
+               p1 = t0.invert(p0);
+               k2 = t0.k * Math.pow(2, -dY / 500);
+               k2 = clamp$1(k2, kMin, kMax);
+               x2 = p0[0] - p1[0] * k2;
+               y2 = p0[1] - p1[1] * k2; // 2 finger map panning (Mac only, all browsers except Firefox #8595) - #5492, #5512
+               // Panning via the `wheel` event will always have:
+               // - `ctrlKey = false`
+               // - `deltaX`,`deltaY` are round integer pixels
+             } else if (detected.os === 'mac' && detected.browser !== 'Firefox' && !source.ctrlKey && isInteger(dX) && isInteger(dY)) {
+               p1 = projection.translate();
+               x2 = p1[0] - dX;
+               y2 = p1[1] - dY;
+               k2 = projection.scale();
+               k2 = clamp$1(k2, kMin, kMax);
+             } // something changed - replace the event transform
 
-             if (layer.source() === d) {
-               _overlayLayers.splice(i, 1);
 
-               dispatch$1.call('change');
-               background.updateImagery();
-               return;
+             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;
+               }
              }
            }
 
-           layer = rendererTileLayer(context).source(d).projection(context.projection).dimensions(baseLayer.dimensions());
+           if (_transformStart.x === x && _transformStart.y === y && _transformStart.k === k) {
+             return; // no change
+           }
 
-           _overlayLayers.push(layer);
+           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;
+           }
 
-           dispatch$1.call('change');
-           background.updateImagery();
-         };
+           projection.transform(eventTransform);
+           var withinEditableZoom = map.withinEditableZoom();
 
-         background.nudge = function (d, zoom) {
-           var currSource = baseLayer.source();
+           if (_lastWithinEditableZoom !== withinEditableZoom) {
+             if (_lastWithinEditableZoom !== undefined) {
+               // notify that the map zoomed in or out over the editable zoom threshold
+               dispatch.call('crossEditableZoom', this, withinEditableZoom);
+             }
 
-           if (currSource) {
-             currSource.nudge(d, zoom);
-             dispatch$1.call('change');
-             background.updateImagery();
+             _lastWithinEditableZoom = withinEditableZoom;
            }
 
-           return background;
-         };
-
-         background.offset = function (d) {
-           var currSource = baseLayer.source();
+           var scale = k / _transformStart.k;
+           var tX = (x / scale - _transformStart.x) * scale;
+           var tY = (y / scale - _transformStart.y) * scale;
 
-           if (!arguments.length) {
-             return currSource && currSource.offset() || [0, 0];
+           if (context.inIntro()) {
+             curtainProjection.transform({
+               x: x - tX,
+               y: y - tY,
+               k: k
+             });
            }
 
-           if (currSource) {
-             currSource.offset(d);
-             dispatch$1.call('change');
-             background.updateImagery();
+           if (source) {
+             _lastPointerEvent = event;
            }
 
-           return background;
-         };
-
-         background.brightness = function (d) {
-           if (!arguments.length) return _brightness;
-           _brightness = d;
-           if (context.mode()) dispatch$1.call('change');
-           return background;
-         };
+           _isTransformed = true;
+           _transformLast = eventTransform;
+           utilSetTransform(supersurface, tX, tY, scale);
+           scheduleRedraw();
+           dispatch.call('move', this, map);
 
-         background.contrast = function (d) {
-           if (!arguments.length) return _contrast;
-           _contrast = d;
-           if (context.mode()) dispatch$1.call('change');
-           return background;
-         };
+           function isInteger(val) {
+             return typeof val === 'number' && isFinite(val) && Math.floor(val) === val;
+           }
+         }
 
-         background.saturation = function (d) {
-           if (!arguments.length) return _saturation;
-           _saturation = d;
-           if (context.mode()) dispatch$1.call('change');
-           return background;
-         };
+         function resetTransform() {
+           if (!_isTransformed) return false;
+           utilSetTransform(supersurface, 0, 0);
+           _isTransformed = false;
 
-         background.sharpness = function (d) {
-           if (!arguments.length) return _sharpness;
-           _sharpness = d;
-           if (context.mode()) dispatch$1.call('change');
-           return background;
-         };
+           if (context.inIntro()) {
+             curtainProjection.transform(projection.transform());
+           }
 
-         var _loadPromise;
+           return true;
+         }
 
-         background.ensureLoaded = function () {
-           if (_loadPromise) return _loadPromise;
+         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 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 (resetTransform()) {
+             difference = extent = undefined;
            }
 
-           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 zoom = map.zoom();
+           var z = String(~~zoom);
 
-             if (!requested && extent) {
-               best = background.sources(extent).find(function (s) {
-                 return s.best();
-               });
-             } // Decide which background layer to display
+           if (surface.attr('data-zoom') !== z) {
+             surface.attr('data-zoom', z);
+           } // class surface as `lowzoom` around z17-z18.5 (based on latitude)
 
 
-             if (requested && requested.indexOf('custom:') === 0) {
-               var template = requested.replace(/^custom:/, '');
-               var custom = background.findSource('custom');
-               background.baseLayerSource(custom.template(template));
-               corePreferences('background-custom-template', template);
-             } else {
-               background.baseLayerSource(background.findSource(requested) || best || background.findSource(corePreferences('background-last-used')) || background.findSource('Bing') || first || background.findSource('none'));
-             }
+           var 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));
 
-             var locator = imageryIndex.backgrounds.find(function (d) {
-               return d.overlay && d["default"];
-             });
+           if (!difference) {
+             supersurface.call(context.background());
+             wrapper.call(drawLayers);
+           } // OSM
 
-             if (locator) {
-               background.toggleOverlayLayer(locator);
-             }
 
-             var overlays = (hash.overlays || '').split(',');
-             overlays.forEach(function (overlay) {
-               overlay = background.findSource(overlay);
+           if (map.editableDataEnabled() || map.isInWideSelection()) {
+             context.loadTiles(projection);
+             drawEditable(difference, extent);
+           } else {
+             editOff();
+           }
 
-               if (overlay) {
-                 background.toggleOverlayLayer(overlay);
-               }
-             });
+           _transformStart = projection.transform();
+           return map;
+         }
 
-             if (hash.gpx) {
-               var gpx = context.layers().layer('data');
+         var immediateRedraw = function immediateRedraw(difference, extent) {
+           if (!difference && !extent) cancelPendingRedraw();
+           redraw(difference, extent);
+         };
 
-               if (gpx) {
-                 gpx.url(hash.gpx, '.gpx');
-               }
-             }
+         map.lastPointerEvent = function () {
+           return _lastPointerEvent;
+         };
 
-             if (hash.offset) {
-               var offset = hash.offset.replace(/;/g, ',').split(',').map(function (n) {
-                 return !isNaN(n) && n;
-               });
+         map.mouse = function (d3_event) {
+           var event = d3_event || _lastPointerEvent;
 
-               if (offset.length === 2) {
-                 background.offset(geoMetersToOffset(offset));
-               }
+           if (event) {
+             var s;
+
+             while (s = event.sourceEvent) {
+               event = s;
              }
-           })["catch"](function () {
-             /* ignore */
-           });
-         };
 
-         return utilRebind(background, dispatch$1, 'on');
-       }
+             return _getMouseCoords(event);
+           }
 
-       function rendererFeatures(context) {
-         var dispatch$1 = dispatch('change', 'redraw');
-         var features = utilRebind({}, dispatch$1, 'on');
+           return null;
+         }; // returns Lng/Lat
 
-         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
+         map.mouseCoordinates = function () {
+           var coord = map.mouse() || pxCenter();
+           return projection.invert(coord);
          };
-         var service_roads = {
-           'service': true,
-           'road': true,
-           'track': true
+
+         map.dblclickZoomEnable = function (val) {
+           if (!arguments.length) return _dblClickZoomEnabled;
+           _dblClickZoomEnabled = val;
+           return map;
          };
-         var paths = {
-           'path': true,
-           'footway': true,
-           'cycleway': true,
-           'bridleway': true,
-           'steps': true,
-           'pedestrian': true
+
+         map.redrawEnable = function (val) {
+           if (!arguments.length) return _redrawEnabled;
+           _redrawEnabled = val;
+           return map;
          };
-         var past_futures = {
-           'proposed': true,
-           'construction': true,
-           'abandoned': true,
-           'dismantled': true,
-           'disused': true,
-           'razed': true,
-           'demolished': true,
-           'obliterated': true
+
+         map.isTransformed = function () {
+           return _isTransformed;
          };
-         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();
+         function setTransform(t2, duration, force) {
+           var t = projection.transform();
+           if (!force && t2.k === t.k && t2.x === t.x && t2.y === t.y) return false;
 
-             if (disabled.length) {
-               hash.disable_features = disabled.join(',');
-             } else {
-               delete hash.disable_features;
-             }
+           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;
 
-             window.location.replace('#' + utilQsString(hash, true));
-             corePreferences('disabled-features', disabled.join(','));
+             _selection.call(_zoomerPanner.transform, _transformStart);
            }
 
-           _hidden = features.hidden();
-           dispatch$1.call('change');
-           dispatch$1.call('redraw');
+           return true;
          }
 
-         function defineRule(k, filter, max) {
-           var isEnabled = true;
-
-           _keys.push(k);
+         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
 
-           _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 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);
          }
 
-         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;
-           }
+         map.pan = function (delta, duration) {
+           var t = projection.translate();
+           var k = projection.scale();
+           t[0] += delta[0];
+           t[1] += delta[1];
 
-           var strings = Object.keys(tags);
+           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();
 
-           for (var i = 0; i < strings.length; i++) {
-             var s = strings[i];
+             _selection.call(_zoomerPanner.transform, _transformStart);
 
-             if (past_futures[s] || past_futures[tags[s]]) {
-               return true;
-             }
+             dispatch.call('move', this, map);
+             immediateRedraw();
            }
 
-           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';
-         });
-
-         features.features = function () {
-           return _rules;
-         };
-
-         features.keys = function () {
-           return _keys;
+           return map;
          };
 
-         features.enabled = function (k) {
-           if (!arguments.length) {
-             return _keys.filter(function (k) {
-               return _rules[k].enabled;
-             });
-           }
-
-           return _rules[k] && _rules[k].enabled;
+         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;
          };
 
-         features.disabled = function (k) {
-           if (!arguments.length) {
-             return _keys.filter(function (k) {
-               return !_rules[k].enabled;
-             });
-           }
-
-           return _rules[k] && !_rules[k].enabled;
-         };
+         function zoomIn(delta) {
+           setCenterZoom(map.center(), ~~map.zoom() + delta, 250, true);
+         }
 
-         features.hidden = function (k) {
-           if (!arguments.length) {
-             return _keys.filter(function (k) {
-               return _rules[k].hidden();
-             });
-           }
+         function zoomOut(delta) {
+           setCenterZoom(map.center(), ~~map.zoom() - delta, 250, true);
+         }
 
-           return _rules[k] && _rules[k].hidden();
+         map.zoomIn = function () {
+           zoomIn(1);
          };
 
-         features.autoHidden = function (k) {
-           if (!arguments.length) {
-             return _keys.filter(function (k) {
-               return _rules[k].autoHidden();
-             });
-           }
-
-           return _rules[k] && _rules[k].autoHidden();
+         map.zoomInFurther = function () {
+           zoomIn(4);
          };
 
-         features.enable = function (k) {
-           if (_rules[k] && !_rules[k].enabled) {
-             _rules[k].enable();
-
-             update();
-           }
+         map.canZoomIn = function () {
+           return map.zoom() < maxZoom;
          };
 
-         features.enableAll = function () {
-           var didEnable = false;
-
-           for (var k in _rules) {
-             if (!_rules[k].enabled) {
-               didEnable = true;
-
-               _rules[k].enable();
-             }
-           }
-
-           if (didEnable) update();
+         map.zoomOut = function () {
+           zoomOut(1);
          };
 
-         features.disable = function (k) {
-           if (_rules[k] && _rules[k].enabled) {
-             _rules[k].disable();
-
-             update();
-           }
+         map.zoomOutFurther = function () {
+           zoomOut(4);
          };
 
-         features.disableAll = function () {
-           var didDisable = false;
-
-           for (var k in _rules) {
-             if (_rules[k].enabled) {
-               didDisable = true;
-
-               _rules[k].disable();
-             }
-           }
-
-           if (didDisable) update();
+         map.canZoomOut = function () {
+           return map.zoom() > minZoom;
          };
 
-         features.toggle = function (k) {
-           if (_rules[k]) {
-             (function (f) {
-               return f.enabled ? f.disable() : f.enable();
-             })(_rules[k]);
-
-             update();
+         map.center = function (loc2) {
+           if (!arguments.length) {
+             return projection.invert(pxCenter());
            }
-         };
 
-         features.resetStats = function () {
-           for (var i = 0; i < _keys.length; i++) {
-             _rules[_keys[i]].count = 0;
+           if (setCenterZoom(loc2, map.zoom())) {
+             dispatch.call('move', this, map);
            }
 
-           dispatch$1.call('change');
+           scheduleRedraw();
+           return map;
          };
 
-         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;
+         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
 
-           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..
+           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');
 
-           _cullFactor = dimensions[0] * dimensions[1] / 1000000;
+           if (!openPane.empty()) {
+             return [openPane.node().offsetWidth / 2, 0];
+           }
 
-           for (i = 0; i < entities.length; i++) {
-             geometry = entities[i].geometry(resolver);
-             matches = Object.keys(features.getMatches(entities[i], resolver, geometry));
+           return [0, 0];
+         };
 
-             for (j = 0; j < matches.length; j++) {
-               _rules[matches[j]].count++;
-             }
+         map.zoom = function (z2) {
+           if (!arguments.length) {
+             return Math.max(geoScaleToZoom(projection.scale(), TILESIZE), 0);
            }
 
-           currHidden = features.hidden();
+           if (z2 < _minzoom) {
+             surface.interrupt();
+             dispatch.call('hitMinZoom', this, map);
+             z2 = context.minEditableZoom();
+           }
 
-           if (currHidden !== _hidden) {
-             _hidden = currHidden;
-             needsRedraw = true;
-             dispatch$1.call('change');
+           if (setCenterZoom(map.center(), z2)) {
+             dispatch.call('move', this, map);
            }
 
-           return needsRedraw;
+           scheduleRedraw();
+           return map;
          };
 
-         features.stats = function () {
-           for (var i = 0; i < _keys.length; i++) {
-             _stats[_keys[i]] = _rules[_keys[i]].count;
+         map.centerZoom = function (loc2, z2) {
+           if (setCenterZoom(loc2, z2)) {
+             dispatch.call('move', this, map);
            }
 
-           return _stats;
+           scheduleRedraw();
+           return map;
          };
 
-         features.clear = function (d) {
-           for (var i = 0; i < d.length; i++) {
-             features.clearEntity(d[i]);
-           }
+         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);
          };
 
-         features.clearEntity = function (entity) {
-           delete _cache[osmEntity.key(entity)];
+         map.centerEase = function (loc2, duration) {
+           duration = duration || 250;
+           setCenterZoom(loc2, map.zoom(), duration);
+           return map;
          };
 
-         features.reset = function () {
-           Array.from(_deferred).forEach(function (handle) {
-             window.cancelIdleCallback(handle);
+         map.zoomEase = function (z2, duration) {
+           duration = duration || 250;
+           setCenterZoom(map.center(), z2, duration, false);
+           return map;
+         };
 
-             _deferred["delete"](handle);
-           });
-           _cache = {};
-         }; // only certain relations are worth checking
+         map.centerZoomEase = function (loc2, z2, duration) {
+           duration = duration || 250;
+           setCenterZoom(loc2, z2, duration, false);
+           return map;
+         };
 
+         map.transformEase = function (t2, duration) {
+           duration = duration || 250;
+           setTransform(t2, duration, false
+           /* don't force */
+           );
+           return map;
+         };
 
-         function relationShouldBeChecked(relation) {
-           // multipolygon features have `area` geometry and aren't checked here
-           return relation.tags.type === 'boundary';
-         }
+         map.zoomToEase = function (obj, duration) {
+           var extent;
 
-         features.getMatches = function (entity, resolver, geometry) {
-           if (geometry === 'vertex' || geometry === 'relation' && !relationShouldBeChecked(entity)) return {};
-           var ent = osmEntity.key(entity);
+           if (Array.isArray(obj)) {
+             obj.forEach(function (entity) {
+               var entityExtent = entity.extent(context.graph());
 
-           if (!_cache[ent]) {
-             _cache[ent] = {};
+               if (!extent) {
+                 extent = entityExtent;
+               } else {
+                 extent = extent.extend(entityExtent);
+               }
+             });
+           } else {
+             extent = obj.extent(context.graph());
            }
 
-           if (!_cache[ent].matches) {
-             var matches = {};
-             var hasMatch = false;
-
-             for (var i = 0; i < _keys.length; i++) {
-               if (_keys[i] === 'others') {
-                 if (hasMatch) continue; // If an entity...
-                 //   1. is a way that hasn't matched other 'interesting' feature rules,
-
-                 if (entity.type === 'way') {
-                   var parents = features.getParents(entity, resolver, geometry); //   2a. belongs only to a single multipolygon relation
-
-                   if (parents.length === 1 && parents[0].isMultipolygon() || // 2b. or belongs only to boundary relations
-                   parents.length > 0 && parents.every(function (parent) {
-                     return parent.tags.type === 'boundary';
-                   })) {
-                     // ...then match whatever feature rules the parent relation has matched.
-                     // see #2548, #2887
-                     //
-                     // IMPORTANT:
-                     // For this to work, getMatches must be called on relations before ways.
-                     //
-                     var pkey = osmEntity.key(parents[0]);
+           if (!isFinite(extent.area())) return map;
+           var z2 = clamp$1(map.trimmedExtentZoom(extent), 0, 20);
+           return map.centerZoomEase(extent.center(), z2, duration);
+         };
 
-                     if (_cache[pkey] && _cache[pkey].matches) {
-                       matches = Object.assign({}, _cache[pkey].matches); // shallow copy
+         map.startEase = function () {
+           utilBindOnce(surface, _pointerPrefix + 'down.ease', function () {
+             map.cancelEase();
+           });
+           return map;
+         };
 
-                       continue;
-                     }
-                   }
-                 }
-               }
+         map.cancelEase = function () {
+           _selection.interrupt();
 
-               if (_rules[_keys[i]].filter(entity.tags, geometry)) {
-                 matches[_keys[i]] = hasMatch = true;
-               }
-             }
+           return map;
+         };
 
-             _cache[ent].matches = matches;
+         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 _cache[ent].matches;
          };
 
-         features.getParents = function (entity, resolver, geometry) {
-           if (geometry === 'point') return [];
-           var ent = osmEntity.key(entity);
-
-           if (!_cache[ent]) {
-             _cache[ent] = {};
+         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));
            }
+         };
 
-           if (!_cache[ent].parents) {
-             var parents = [];
+         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
 
-             if (geometry === 'vertex') {
-               parents = resolver.parentWays(entity);
-             } else {
-               // 'line', 'area', 'relation'
-               parents = resolver.parentRelations(entity);
-             }
+           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;
+         }
 
-             _cache[ent].parents = parents;
-           }
+         map.extentZoom = function (val) {
+           return calcExtentZoom(geoExtent(val), _dimensions);
+         };
 
-           return _cache[ent].parents;
+         map.trimmedExtentZoom = function (val) {
+           var trimY = 120;
+           var trimX = 40;
+           var trimmed = [_dimensions[0] - trimX, _dimensions[1] - trimY];
+           return calcExtentZoom(geoExtent(val), trimmed);
          };
 
-         features.isHiddenPreset = function (preset, geometry) {
-           if (!_hidden.length) return false;
-           if (!preset.tags) return false;
-           var test = preset.setTags({}, geometry);
+         map.withinEditableZoom = function () {
+           return map.zoom() >= context.minEditableZoom();
+         };
 
-           for (var key in _rules) {
-             if (_rules[key].filter(test, geometry)) {
-               if (_hidden.indexOf(key) !== -1) {
-                 return key;
-               }
+         map.isInWideSelection = function () {
+           return !map.withinEditableZoom() && context.selectedIDs().length;
+         };
 
-               return false;
-             }
-           }
+         map.editableDataEnabled = function (skipZoomCheck) {
+           var layer = context.layers().layer('osm');
+           if (!layer || !layer.enabled()) return false;
+           return skipZoomCheck || map.withinEditableZoom();
+         };
 
-           return false;
+         map.notesEditable = function () {
+           var layer = context.layers().layer('notes');
+           if (!layer || !layer.enabled()) return false;
+           return map.withinEditableZoom();
          };
 
-         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);
-           });
+         map.minzoom = function (val) {
+           if (!arguments.length) return _minzoom;
+           _minzoom = val;
+           return map;
          };
 
-         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;
+         map.toggleHighlightEdited = function () {
+           surface.classed('highlight-edited', !surface.classed('highlight-edited'));
+           map.pan([0, 0]); // trigger a redraw
 
-           for (var i = 0; i < parents.length; i++) {
-             if (!features.isHidden(parents[i], resolver, parents[i].geometry(resolver))) {
-               return false;
-             }
+           dispatch.call('changeHighlighting', this);
+         };
+
+         map.areaFillOptions = ['wireframe', 'partial', 'full'];
+
+         map.activeAreaFill = function (val) {
+           if (!arguments.length) return corePreferences('area-fill') || 'partial';
+           corePreferences('area-fill', val);
+
+           if (val !== 'wireframe') {
+             corePreferences('area-fill-toggle', val);
            }
 
-           return true;
+           updateAreaFill();
+           map.pan([0, 0]); // trigger a redraw
+
+           dispatch.call('changeAreaFill', this);
+           return map;
          };
 
-         features.hasHiddenConnections = function (entity, resolver) {
-           if (!_hidden.length) return false;
-           var childNodes, connections;
+         map.toggleWireframe = function () {
+           var activeFill = map.activeAreaFill();
 
-           if (entity.type === 'midpoint') {
-             childNodes = [resolver.entity(entity.edge[0]), resolver.entity(entity.edge[1])];
-             connections = [];
+           if (activeFill === 'wireframe') {
+             activeFill = corePreferences('area-fill-toggle') || 'partial';
            } else {
-             childNodes = entity.nodes ? resolver.childNodes(entity) : [];
-             connections = features.getParents(entity, resolver, entity.geometry(resolver));
-           } // gather ways connected to child nodes..
+             activeFill = 'wireframe';
+           }
 
+           map.activeAreaFill(activeFill);
+         };
 
-           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));
+         function updateAreaFill() {
+           var activeFill = map.activeAreaFill();
+           map.areaFillOptions.forEach(function (opt) {
+             surface.classed('fill-' + opt, Boolean(opt === activeFill));
            });
-         };
+         }
 
-         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);
+         map.layers = function () {
+           return drawLayers;
          };
 
-         features.filter = function (d, resolver) {
-           if (!_hidden.length) return d;
-           var result = [];
+         map.doubleUpHandler = function () {
+           return _doubleUpHandler;
+         };
 
-           for (var i = 0; i < d.length; i++) {
-             var entity = d[i];
+         return utilRebind(map, dispatch, 'on');
+       }
 
-             if (!features.isHidden(entity, resolver, entity.geometry(resolver))) {
-               result.push(entity);
-             }
-           }
+       function rendererPhotos(context) {
+         var dispatch = dispatch$8('change');
+         var _layerIDs = ['streetside', 'mapillary', 'mapillary-map-features', 'mapillary-signs', 'openstreetcam'];
+         var _allPhotoTypes = ['flat', 'panoramic'];
 
-           return result;
-         };
+         var _shownPhotoTypes = _allPhotoTypes.slice(); // shallow copy
 
-         features.forceVisible = function (entityIDs) {
-           if (!arguments.length) return Object.keys(_forceVisible);
-           _forceVisible = {};
 
-           for (var i = 0; i < entityIDs.length; i++) {
-             _forceVisible[entityIDs[i]] = true;
-             var entity = context.hasEntity(entityIDs[i]);
+         var _dateFilters = ['fromDate', 'toDate'];
 
-             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 _fromDate;
 
-           return features;
-         };
+         var _toDate;
 
-         features.init = function () {
-           var storage = corePreferences('disabled-features');
+         var _usernames;
 
-           if (storage) {
-             var storageDisabled = storage.replace(/;/g, ',').split(',');
-             storageDisabled.forEach(features.disable);
-           }
+         function photos() {}
 
+         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 (hash.disable_features) {
-             var hashDisabled = hash.disable_features.replace(/;/g, ',').split(',');
-             hashDisabled.forEach(features.disable);
+           if (enabled.length) {
+             hash.photo_overlay = enabled.join(',');
+           } else {
+             delete hash.photo_overlay;
            }
-         }; // warm up the feature matching cache upon merging fetched data
-
 
-         context.history().on('merge.features', function (newEntities) {
-           if (!newEntities) return;
-           var handle = window.requestIdleCallback(function () {
-             var graph = context.graph();
-             var types = utilArrayGroupBy(newEntities, 'type'); // ensure that getMatches is called on relations before ways
-
-             var entities = [].concat(types.relation || [], types.way || [], types.node || []);
+           window.location.replace('#' + utilQsString(hash, true));
+         }
 
-             for (var i = 0; i < entities.length; i++) {
-               var geometry = entities[i].geometry(graph);
-               features.getMatches(entities[i], graph, geometry);
-             }
-           });
+         photos.overlayLayerIDs = function () {
+           return _layerIDs;
+         };
 
-           _deferred.add(handle);
-         });
-         return features;
-       }
+         photos.allPhotoTypes = function () {
+           return _allPhotoTypes;
+         };
 
-       //
-       // - 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
-       //
+         photos.dateFilters = function () {
+           return _dateFilters;
+         };
 
-       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;
+         photos.dateFilterValue = function (val) {
+           return val === _dateFilters[0] ? _fromDate : _toDate;
+         };
 
-         for (i = 0; i < parents.length; i++) {
-           nodes = parents[i].nodes;
-           isClosed = parents[i].isClosed();
+         photos.setDateFilter = function (type, val, updateUrl) {
+           // validate the date
+           var date = val && new Date(val);
 
-           for (j = 0; j < nodes.length; j++) {
-             // find this vertex, look nearby
-             if (nodes[j] === node.id) {
-               ix1 = j - 2;
-               ix2 = j - 1;
-               ix3 = j + 1;
-               ix4 = j + 2;
+           if (date && !isNaN(date)) {
+             val = date.toISOString().substr(0, 10);
+           } else {
+             val = null;
+           }
 
-               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 (type === _dateFilters[0]) {
+             _fromDate = val;
 
-               if (nodes[ix1] === activeID) return 0; // no - prevent self intersect
-               else if (nodes[ix2] === activeID) return 2; // ok - adjacent
-                 else if (nodes[ix3] === activeID) return 2; // ok - adjacent
-                   else if (nodes[ix4] === activeID) return 0; // no - prevent self intersect
-                     else if (isClosed && nodes.indexOf(activeID) !== -1) return 0; // no - prevent self intersect
+             if (_fromDate && _toDate && new Date(_toDate) < new Date(_fromDate)) {
+               _toDate = _fromDate;
              }
            }
-         }
 
-         return 1; // ok
-       }
-       function svgMarkerSegments(projection, graph, dt, shouldReverse, bothDirections) {
-         return function (entity) {
-           var i = 0;
-           var offset = dt;
-           var segments = [];
-           var clip = d3_geoIdentity().clipExtent(projection.clipExtent()).stream;
-           var coordinates = graph.childNodes(entity).map(function (n) {
-             return n.loc;
-           });
-           var a, b;
+           if (type === _dateFilters[1]) {
+             _toDate = val;
 
-           if (shouldReverse(entity)) {
-             coordinates.reverse();
+             if (_fromDate && _toDate && new Date(_toDate) < new Date(_fromDate)) {
+               _fromDate = _toDate;
+             }
            }
 
-           d3_geoStream({
-             type: 'LineString',
-             coordinates: coordinates
-           }, projection.stream(clip({
-             lineStart: function lineStart() {},
-             lineEnd: function lineEnd() {
-               a = null;
-             },
-             point: function point(x, y) {
-               b = [x, y];
-
-               if (a) {
-                 var span = geoVecLength(a, b) - offset;
-
-                 if (span >= 0) {
-                   var heading = geoVecAngle(a, b);
-                   var dx = dt * Math.cos(heading);
-                   var dy = dt * Math.sin(heading);
-                   var p = [a[0] + offset * Math.cos(heading), a[1] + offset * Math.sin(heading)]; // gather coordinates
-
-                   var coord = [a, p];
-
-                   for (span -= dt; span >= 0; span -= dt) {
-                     p = geoVecAdd(p, [dx, dy]);
-                     coord.push(p);
-                   }
+           dispatch.call('change', this);
 
-                   coord.push(b); // generate svg paths
+           if (updateUrl) {
+             var rangeString;
 
-                   var segment = '';
-                   var j;
+             if (_fromDate || _toDate) {
+               rangeString = (_fromDate || '') + '_' + (_toDate || '');
+             }
 
-                   for (j = 0; j < coord.length; j++) {
-                     segment += (j === 0 ? 'M' : 'L') + coord[j][0] + ',' + coord[j][1];
-                   }
+             setUrlFilterValue('photo_dates', rangeString);
+           }
+         };
 
-                   segments.push({
-                     id: entity.id,
-                     index: i++,
-                     d: segment
-                   });
+         photos.setUsernameFilter = function (val, updateUrl) {
+           if (val && typeof val === 'string') val = val.replace(/;/g, ',').split(',');
 
-                   if (bothDirections(entity)) {
-                     segment = '';
+           if (val) {
+             val = val.map(function (d) {
+               return d.trim();
+             }).filter(Boolean);
 
-                     for (j = coord.length - 1; j >= 0; j--) {
-                       segment += (j === coord.length - 1 ? 'M' : 'L') + coord[j][0] + ',' + coord[j][1];
-                     }
+             if (!val.length) {
+               val = null;
+             }
+           }
 
-                     segments.push({
-                       id: entity.id,
-                       index: i++,
-                       d: segment
-                     });
-                   }
-                 }
+           _usernames = val;
+           dispatch.call('change', this);
 
-                 offset = -span;
-               }
+           if (updateUrl) {
+             var hashString;
 
-               a = b;
+             if (_usernames) {
+               hashString = _usernames.join(',');
              }
-           })));
-           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));
+             setUrlFilterValue('photo_username', hashString);
            }
          };
 
-         svgpath.geojson = function (d) {
-           if (d.__featurehash__ !== undefined) {
-             if (d.__featurehash__ in cache) {
-               return cache[d.__featurehash__];
+         function setUrlFilterValue(property, val) {
+           if (!window.mocha) {
+             var hash = utilStringQs(window.location.hash);
+
+             if (val) {
+               if (hash[property] === val) return;
+               hash[property] = val;
              } else {
-               return cache[d.__featurehash__] = path(d);
+               if (!(property in hash)) return;
+               delete hash[property];
              }
-           } else {
-             return path(d);
+
+             window.location.replace('#' + utilQsString(hash, true));
            }
+         }
+
+         function showsLayer(id) {
+           var layer = context.layers().layer(id);
+           return layer && layer.supported() && layer.enabled();
+         }
+
+         photos.shouldFilterByDate = function () {
+           return showsLayer('mapillary') || showsLayer('openstreetcam') || showsLayer('streetside');
          };
 
-         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] + ')';
+         photos.shouldFilterByPhotoType = function () {
+           return showsLayer('mapillary') || showsLayer('streetside') && showsLayer('openstreetcam');
          };
 
-         svgpoint.geojson = function (d) {
-           return svgpoint(d.properties.entity);
+         photos.shouldFilterByUsername = function () {
+           return !showsLayer('mapillary') && showsLayer('openstreetcam') && !showsLayer('streetside');
          };
 
-         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;
+         photos.showsPhotoType = function (val) {
+           if (!photos.shouldFilterByPhotoType()) return true;
+           return _shownPhotoTypes.indexOf(val) !== -1;
+         };
 
-             if (type === 'multipolygon' && shouldCopyMultipolygonTags || type === 'boundary') {
-               tags = Object.assign({}, relation.tags, tags);
-             }
-           });
-           return tags;
+         photos.showsFlat = function () {
+           return photos.showsPhotoType('flat');
          };
-       }
-       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;
+         photos.showsPanoramic = function () {
+           return photos.showsPhotoType('panoramic');
+         };
 
-           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
-             };
+         photos.fromDate = function () {
+           return _fromDate;
+         };
 
-             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);
-               }
-             }
+         photos.toDate = function () {
+           return _toDate;
+         };
 
-             start = end;
+         photos.togglePhotoType = function (val) {
+           var index = _shownPhotoTypes.indexOf(val);
+
+           if (index !== -1) {
+             _shownPhotoTypes.splice(index, 1);
+           } else {
+             _shownPhotoTypes.push(val);
            }
 
-           return features;
+           dispatch.call('change', this);
+           return photos;
+         };
 
-           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]
-               }
+         photos.usernames = function () {
+           return _usernames;
+         };
+
+         photos.init = function () {
+           var hash = utilStringQs(window.location.hash);
+
+           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);
+           }
+
+           if (hash.photo_username) {
+             this.setUsernameFilter(hash.photo_username, false);
+           }
+
+           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);
              });
            }
 
-           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]
+           if (hash.photo) {
+             // support opening a photo via a URL parameter, e.g. `photo=mapillary-fztgSDtLpa08ohPZFZjeRQ`
+             var photoIds = hash.photo.replace(/;/g, ',').split(',');
+             var photoId = photoIds.length && photoIds[0].trim();
+             var results = /(.*)\/(.*)/g.exec(photoId);
+
+             if (results && results.length >= 3) {
+               var serviceId = results[1];
+               var photoKey = results[2];
+               var service = services[serviceId];
+
+               if (service && service.ensureViewerLoaded) {
+                 // if we're showing a photo then make sure its layer is enabled too
+                 var layer = _layerIDs.indexOf(serviceId) !== -1 && context.layers().layer(serviceId);
+                 if (layer && !layer.enabled()) layer.enabled(true);
+                 var baselineTime = Date.now();
+                 service.on('loadedImages.rendererPhotos', function () {
+                   // don't open the viewer if too much time has elapsed
+                   if (Date.now() - baselineTime > 45000) {
+                     service.on('loadedImages.rendererPhotos', null);
+                     return;
+                   }
+
+                   if (!service.cachedImage(photoKey)) return;
+                   service.on('loadedImages.rendererPhotos', null);
+                   service.ensureViewerLoaded(context).then(function () {
+                     service.selectImage(context, photoKey).showViewer(context);
+                   });
+                 });
                }
-             });
+             }
            }
-         }
+
+           context.layers().on('change.rendererPhotos', updateStorage);
+         };
+
+         return utilRebind(photos, dispatch, 'on');
        }
 
-       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'];
+       function uiAccount(context) {
+         var osm = context.connection();
 
-         var _tags = function _tags(entity) {
-           return entity.tags;
-         };
+         function update(selection) {
+           if (!osm) return;
 
-         var tagClasses = function tagClasses(selection) {
-           selection.each(function tagClassesEach(entity) {
-             var value = this.className;
+           if (!osm.authenticated()) {
+             selection.selectAll('.userLink, .logoutLink').classed('hide', true);
+             return;
+           }
 
-             if (value.baseVal !== undefined) {
-               value = value.baseVal;
-             }
+           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
 
-             var t = _tags(entity);
+             var userLinkA = userLink.append('a').attr('href', osm.userURL(details.display_name)).attr('target', '_blank'); // Add thumbnail or dont
 
-             var computed = tagClasses.getClassesString(t, value);
+             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 (computed !== value) {
-               select(this).attr('class', computed);
-             }
+
+             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();
+             });
            });
+         }
+
+         return function (selection) {
+           selection.append('li').attr('class', 'userLink').classed('hide', true);
+           selection.append('li').attr('class', 'logoutLink').classed('hide', true);
+
+           if (osm) {
+             osm.on('change.account', function () {
+               update(selection);
+             });
+             update(selection);
+           }
          };
+       }
 
-         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 uiAttribution(context) {
+         var _selection = select(null);
 
-           var overrideGeometry;
+         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 (/\bstroke\b/.test(value)) {
-             if (!!t.barrier && t.barrier !== 'no') {
-               overrideGeometry = 'line';
+             if (d.terms_html) {
+               attribution.html(d.terms_html);
+               return;
              }
-           } // preserve base classes (nothing with `tag-`)
 
+             if (d.terms_url) {
+               attribution = attribution.append('a').attr('href', d.terms_url).attr('target', '_blank');
+             }
 
-           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;
+             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 (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';
+             if (d.icon && !d.overlay) {
+               attribution.append('img').attr('class', 'source-image').attr('src', d.icon);
              }
 
-             primary = k;
+             attribution.append('span').attr('class', 'attribution-text').html(terms_text);
+           }).merge(attributions);
+           var copyright = attributions.selectAll('.copyright-notice').data(function (d) {
+             var notice = d.copyrightNotices(context.map().zoom(), context.map().extent());
+             return notice ? [notice] : [];
+           });
+           copyright.exit().remove();
+           copyright = copyright.enter().append('span').attr('class', 'copyright-notice').merge(copyright);
+           copyright.html(String);
+         }
 
-             if (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 update() {
+           var baselayer = context.background().baseLayerSource();
 
-             break;
-           }
+           _selection.call(render, baselayer ? [baselayer] : [], 'base-layer-attribution');
 
-           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`
+           var z = context.map().zoom();
+           var overlays = context.background().overlayLayerSources() || [];
 
-                 v = t[k];
-                 if (!v || v === 'no') continue;
-                 status = statuses[i];
-                 break;
-               }
-             }
-           } // add at most one status tag, only if relates to primary tag..
+           _selection.call(render, overlays.filter(function (s) {
+             return s.validZoom(z);
+           }), 'overlay-layer-attribution');
+         }
 
+         return function (selection) {
+           _selection = selection;
+           context.background().on('change.attribution', update);
+           context.map().on('move.attribution', throttle(update, 400, {
+             leading: false
+           }));
+           update();
+         };
+       }
 
-           if (!status) {
-             for (i = 0; i < statuses.length; i++) {
-               k = statuses[i];
-               v = t[k];
-               if (!v || v === 'no') continue;
+       function uiContributors(context) {
+         var osm = context.connection(),
+             debouncedUpdate = debounce(function () {
+           update();
+         }, 1000),
+             limit = 4,
+             hidden = false,
+             wrap = select(null);
 
-               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 update() {
+           if (!osm) return;
+           var users = {},
+               entities = context.history().intersects(context.map().extent());
+           entities.forEach(function (entity) {
+             if (entity && entity.user) users[entity.user] = true;
+           });
+           var u = Object.keys(users),
+               subset = u.slice(0, u.length > limit ? limit - 1 : limit);
+           wrap.html('').call(svgIcon('#iD-icon-nearby', 'pre-text light'));
+           var userList = select(document.createElement('span'));
+           userList.selectAll().data(subset).enter().append('a').attr('class', 'user-link').attr('href', function (d) {
+             return osm.userURL(d);
+           }).attr('target', '_blank').html(String);
+
+           if (u.length > limit) {
+             var count = select(document.createElement('span'));
+             var othersNum = u.length - limit + 1;
+             count.append('a').attr('target', '_blank').attr('href', function () {
+               return osm.changesetsURL(context.map().center(), context.map().zoom());
+             }).html(othersNum);
+             wrap.append('span').html(_t.html('contributors.truncated_list', {
+               n: othersNum,
+               users: userList.html(),
+               count: count.html()
+             }));
+           } else {
+             wrap.append('span').html(_t.html('contributors.list', {
+               users: userList.html()
+             }));
+           }
+
+           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 _popoverID = 0;
+       function uiPopover(klass) {
+         var _id = _popoverID++;
+
+         var _anchorSelection = select(null);
 
+         var popover = function popover(selection) {
+           _anchorSelection = selection;
+           selection.each(setup);
+         };
 
-               if (status) break;
-             }
-           }
+         var _animation = utilFunctor(false);
 
-           if (status) {
-             classes.push('tag-status');
-             classes.push('tag-status-' + status);
-           } // add any secondary tags
+         var _placement = utilFunctor('top'); // top, bottom, left, right
 
 
-           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..
+         var _alignment = utilFunctor('center'); // leading, center, trailing
 
 
-           if (primary === 'highway' && !osmPathHighwayTagValues[t.highway] || primary === 'aeroway') {
-             var surface = t.highway === 'track' ? 'unpaved' : 'paved';
+         var _scrollContainer = utilFunctor(select(null));
 
-             for (k in t) {
-               v = t[k];
+         var _content;
 
-               if (k in osmPavedTags) {
-                 surface = osmPavedTags[k][v] ? 'paved' : 'unpaved';
-               }
+         var _displayType = utilFunctor('');
 
-               if (k in osmSemipavedTags && !!osmSemipavedTags[k][v]) {
-                 surface = 'semipaved';
-               }
-             }
+         var _hasArrow = utilFunctor(true); // use pointer events on supported platforms; fallback to mouse events
 
-             classes.push('tag-' + surface);
-           } // If this is a wikidata-tagged item, add a class for that..
 
+         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-           if (t.wikidata || t['brand:wikidata']) {
-             classes.push('tag-wikidata');
+         popover.displayType = function (val) {
+           if (arguments.length) {
+             _displayType = utilFunctor(val);
+             return popover;
+           } else {
+             return _displayType;
            }
-
-           return classes.join(' ').trim();
          };
 
-         tagClasses.tags = function (val) {
-           if (!arguments.length) return _tags;
-           _tags = val;
-           return tagClasses;
+         popover.hasArrow = function (val) {
+           if (arguments.length) {
+             _hasArrow = utilFunctor(val);
+             return popover;
+           } else {
+             return _hasArrow;
+           }
          };
 
-         return tagClasses;
-       }
+         popover.placement = function (val) {
+           if (arguments.length) {
+             _placement = utilFunctor(val);
+             return popover;
+           } else {
+             return _placement;
+           }
+         };
 
-       // 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;
-         }
+         popover.alignment = function (val) {
+           if (arguments.length) {
+             _alignment = utilFunctor(val);
+             return popover;
+           } else {
+             return _alignment;
+           }
+         };
 
-         for (var tag in patterns) {
-           var entityValue = tags[tag];
-           if (!entityValue) continue;
+         popover.scrollContainer = function (val) {
+           if (arguments.length) {
+             _scrollContainer = utilFunctor(val);
+             return popover;
+           } else {
+             return _scrollContainer;
+           }
+         };
 
-           if (typeof patterns[tag] === 'string') {
-             // extra short syntax (just tag) - pattern name
-             return 'pattern-' + patterns[tag];
+         popover.content = function (val) {
+           if (arguments.length) {
+             _content = val;
+             return popover;
            } else {
-             var values = patterns[tag];
+             return _content;
+           }
+         };
 
-             for (var value in values) {
-               if (entityValue !== value) continue;
-               var rules = values[value];
+         popover.isShown = function () {
+           var popoverSelection = _anchorSelection.select('.popover-' + _id);
 
-               if (typeof rules === 'string') {
-                 // short syntax - pattern name
-                 return 'pattern-' + rules;
-               } // long syntax - rule array
+           return !popoverSelection.empty() && popoverSelection.classed('in');
+         };
 
+         popover.show = function () {
+           _anchorSelection.each(show);
+         };
 
-               for (var ruleKey in rules) {
-                 var rule = rules[ruleKey];
-                 var pass = true;
+         popover.updateContent = function () {
+           _anchorSelection.each(updateContent);
+         };
 
-                 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];
+         popover.hide = function () {
+           _anchorSelection.each(hide);
+         };
 
-                     if (!v || v !== rule[criterion]) {
-                       pass = false;
-                       break;
-                     }
-                   }
-                 }
+         popover.toggle = function () {
+           _anchorSelection.each(toggle);
+         };
 
-                 if (pass) {
-                   return 'pattern-' + rule.pattern;
-                 }
-               }
-             }
-           }
-         }
+         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();
+         };
 
-         return null;
-       }
+         popover.destroyAny = function (selection) {
+           selection.call(popover.destroy, '.popover');
+         };
 
-       function svgAreas(projection, context) {
-         function getPatternStyle(tags) {
-           var imageID = svgTagPattern(tags);
+         function setup() {
+           var anchor = select(this);
 
-           if (imageID) {
-             return 'url("#ideditor-' + imageID + '")';
-           }
+           var animate = _animation.apply(this, arguments);
 
-           return '';
-         }
+           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);
 
-         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 (animate) {
+             popoverSelection.classed('fade', true);
+           }
 
-           var data = {
-             targets: [],
-             nopes: []
-           };
-           entities.forEach(function (way) {
-             var features = svgSegmentWay(way, graph, activeID);
-             data.targets.push.apply(data.targets, features.passive);
-             data.nopes.push.apply(data.nopes, features.active);
-           }); // Targets allow hover and vertex snapping
+           var display = _displayType.apply(this, arguments);
 
-           var targetData = data.targets.filter(getPath);
-           var targets = selection.selectAll('.area.target-allowed').filter(function (d) {
-             return filter(d.properties.entity);
-           }).data(targetData, function key(d) {
-             return d.id;
-           }); // exit
+           if (display === 'hover') {
+             var _lastNonMouseEnterTime;
 
-           targets.exit().remove();
+             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 segmentWasEdited = function segmentWasEdited(d) {
-             var wayID = d.properties.entity.id; // if the whole line was edited, don't draw segment changes
+                   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 (!base.entities[wayID] || !fastDeepEqual(graph.entities[wayID].nodes, base.entities[wayID].nodes)) {
-               return false;
-             }
 
-             return d.properties.nodes.some(function (n) {
-               return !base.entities[n.id] || !fastDeepEqual(graph.entities[n.id].loc, base.entities[n.id].loc);
+               if (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);
              });
-           }; // enter/update
+           } 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);
+               });
+             });
+           }
+         }
 
+         function show() {
+           var anchor = select(this);
+           var popoverSelection = anchor.selectAll('.popover-' + _id);
 
-           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 (popoverSelection.empty()) {
+             // popover was removed somehow, put it back
+             anchor.call(popover.destroy);
+             anchor.each(setup);
+             popoverSelection = anchor.selectAll('.popover-' + _id);
+           }
 
-           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
+           popoverSelection.classed('in', true);
 
-           nopes.exit().remove(); // enter/update
+           var displayType = _displayType.apply(this, arguments);
 
-           nopes.enter().append('path').merge(nopes).attr('d', getPath).attr('class', function (d) {
-             return 'way area target target-nope ' + nopeClass + d.id;
-           }).classed('segment-edited', segmentWasEdited);
-         }
+           if (displayType === 'clickFocus') {
+             anchor.classed('active', true);
+             popoverSelection.node().focus();
+           }
 
-         function drawAreas(selection, graph, entities, filter) {
-           var path = svgPath(projection, graph, true);
-           var areas = {};
-           var multipolygon;
-           var base = context.history().base();
+           anchor.each(updateContent);
+         }
 
-           for (var i = 0; i < entities.length; i++) {
-             var entity = entities[i];
-             if (entity.geometry(graph) !== 'area') continue;
-             multipolygon = osmIsOldMultipolygonOuterMember(entity, graph);
+         function updateContent() {
+           var anchor = select(this);
 
-             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 (_content) {
+             anchor.selectAll('.popover-' + _id + ' > .popover-inner').call(_content.apply(this, arguments));
            }
 
-           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..
+           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
 
-           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;
+           updatePosition.apply(this, arguments);
+           updatePosition.apply(this, arguments);
+         }
 
-           function sortedByArea(entity) {
-             if (this._parent.__data__ === 'fill') {
-               return fillpaths[bisect(fillpaths, -entity.area(graph))];
-             }
-           }
+         function updatePosition() {
+           var anchor = select(this);
+           var popoverSelection = anchor.selectAll('.popover-' + _id);
 
-           paths = paths.enter().insert('path', sortedByArea).merge(paths).each(function (entity) {
-             var layer = this.parentNode.__data__;
-             this.setAttribute('class', entity.type + ' area ' + layer + ' ' + entity.id);
+           var scrollContainer = _scrollContainer && _scrollContainer.apply(this, arguments);
 
-             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..
+           var scrollNode = scrollContainer && !scrollContainer.empty() && scrollContainer.node();
+           var scrollLeft = scrollNode ? scrollNode.scrollLeft : 0;
+           var scrollTop = scrollNode ? scrollNode.scrollTop : 0;
 
-           touchLayer.call(drawTargets, graph, data.stroke, filter);
-         }
+           var placement = _placement.apply(this, arguments);
 
-         return drawAreas;
-       }
+           popoverSelection.classed('left', false).classed('right', false).classed('top', false).classed('bottom', false).classed(placement, true);
+
+           var alignment = _alignment.apply(this, arguments);
+
+           var alignFactor = 0.5;
+
+           if (alignment === 'leading') {
+             alignFactor = 0;
+           } else if (alignment === 'trailing') {
+             alignFactor = 1;
+           }
 
-       //[4]           NameStartChar      ::=          ":" | [A-Z] | "_" | [a-z] | [#xC0-#xD6] | [#xD8-#xF6] | [#xF8-#x2FF] | [#x370-#x37D] | [#x37F-#x1FFF] | [#x200C-#x200D] | [#x2070-#x218F] | [#x2C00-#x2FEF] | [#x3001-#xD7FF] | [#xF900-#xFDCF] | [#xFDF0-#xFFFD] | [#x10000-#xEFFFF]
-       //[4a]          NameChar           ::=          NameStartChar | "-" | "." | [0-9] | #xB7 | [#x0300-#x036F] | [#x203F-#x2040]
-       //[5]           Name       ::=          NameStartChar (NameChar)*
-       var nameStartChar = /[A-Z_a-z\xC0-\xD6\xD8-\xF6\u00F8-\u02FF\u0370-\u037D\u037F-\u1FFF\u200C-\u200D\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF\uF900-\uFDCF\uFDF0-\uFFFD]/; //\u10000-\uEFFFF
+           var anchorFrame = getFrame(anchor.node());
+           var popoverFrame = getFrame(popoverSelection.node());
+           var position;
 
-       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
+           switch (placement) {
+             case 'top':
+               position = {
+                 x: anchorFrame.x + (anchorFrame.w - popoverFrame.w) * alignFactor,
+                 y: anchorFrame.y - popoverFrame.h
+               };
+               break;
 
-       var S_TAG = 0; //tag name offerring
+             case 'bottom':
+               position = {
+                 x: anchorFrame.x + (anchorFrame.w - popoverFrame.w) * alignFactor,
+                 y: anchorFrame.y + anchorFrame.h
+               };
+               break;
 
-       var S_ATTR = 1; //attr name offerring 
+             case 'left':
+               position = {
+                 x: anchorFrame.x - popoverFrame.w,
+                 y: anchorFrame.y + (anchorFrame.h - popoverFrame.h) * alignFactor
+               };
+               break;
 
-       var S_ATTR_SPACE = 2; //attr name end and space offer
+             case 'right':
+               position = {
+                 x: anchorFrame.x + anchorFrame.w,
+                 y: anchorFrame.y + (anchorFrame.h - popoverFrame.h) * alignFactor
+               };
+               break;
+           }
 
-       var S_EQ = 3; //=space?
+           if (position) {
+             if (scrollNode && (placement === 'top' || placement === 'bottom')) {
+               var initialPosX = position.x;
 
-       var S_ATTR_NOQUOT_VALUE = 4; //attr value(no quot value only)
+               if (position.x + popoverFrame.w > scrollNode.offsetWidth - 10) {
+                 position.x = scrollNode.offsetWidth - 10 - popoverFrame.w;
+               } else if (position.x < 10) {
+                 position.x = 10;
+               }
 
-       var S_ATTR_END = 5; //attr value end and no space(quot end)
+               var arrow = anchor.selectAll('.popover-' + _id + ' > .popover-arrow'); // keep the arrow centered on the button, or as close as possible
 
-       var S_TAG_SPACE = 6; //(attr value end || tag end ) && (space offer)
+               var arrowPosX = Math.min(Math.max(popoverFrame.w / 2 - (position.x - initialPosX), 10), popoverFrame.w - 10);
+               arrow.style('left', ~~arrowPosX + 'px');
+             }
 
-       var S_TAG_CLOSE = 7; //closed el<el />
+             popoverSelection.style('left', ~~position.x + 'px').style('top', ~~position.y + 'px');
+           } else {
+             popoverSelection.style('left', null).style('top', null);
+           }
 
-       function XMLReader() {}
+           function getFrame(node) {
+             var positionStyle = select(node).style('position');
 
-       XMLReader.prototype = {
-         parse: function parse(source, defaultNSMap, entityMap) {
-           var domBuilder = this.domBuilder;
-           domBuilder.startDocument();
+             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
+               };
+             }
+           }
+         }
 
-           _copy(defaultNSMap, defaultNSMap = {});
+         function hide() {
+           var anchor = select(this);
 
-           _parse(source, defaultNSMap, entityMap, domBuilder, this.errorHandler);
+           if (_displayType.apply(this, arguments) === 'clickFocus') {
+             anchor.classed('active', false);
+           }
 
-           domBuilder.endDocument();
+           anchor.selectAll('.popover-' + _id).classed('in', false);
          }
-       };
 
-       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 toggle() {
+           if (select(this).select('.popover-' + _id).classed('in')) {
+             hide.apply(this, arguments);
            } else {
-             return String.fromCharCode(code);
+             show.apply(this, arguments);
            }
          }
 
-         function entityReplacer(a) {
-           var k = a.slice(1, -1);
+         return popover;
+       }
 
-           if (k in entityMap) {
-             return entityMap[k];
-           } else if (k.charAt(0) === '#') {
-             return fixedFromCharCode(parseInt(k.substr(1).replace('x', '0x')));
-           } else {
-             errorHandler.error('entity not found:' + a);
-             return a;
-           }
-         }
+       function uiTooltip(klass) {
+         var tooltip = uiPopover((klass || '') + ' tooltip').displayType('hover');
 
-         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;
-           }
-         }
+         var _title = function _title() {
+           var title = this.getAttribute('data-original-title');
 
-         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 (title) {
+             return title;
+           } else {
+             title = this.getAttribute('title');
+             this.removeAttribute('title');
+             this.setAttribute('data-original-title', title);
            }
 
-           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;
+           return title;
+         };
 
-         while (true) {
-           try {
-             var tagStart = source.indexOf('<', start);
+         var _heading = utilFunctor(null);
 
-             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;
-               }
+         var _keys = utilFunctor(null);
 
-               return;
-             }
+         tooltip.title = function (val) {
+           if (!arguments.length) return _title;
+           _title = utilFunctor(val);
+           return tooltip;
+         };
 
-             if (tagStart > start) {
-               appendText(tagStart);
-             }
+         tooltip.heading = function (val) {
+           if (!arguments.length) return _heading;
+           _heading = utilFunctor(val);
+           return tooltip;
+         };
 
-             switch (source.charAt(tagStart + 1)) {
-               case '/':
-                 var end = source.indexOf('>', tagStart + 3);
-                 var tagName = source.substring(tagStart + 2, end);
-                 var config = parseStack.pop();
+         tooltip.keys = function (val) {
+           if (!arguments.length) return _keys;
+           _keys = utilFunctor(val);
+           return tooltip;
+         };
 
-                 if (end < 0) {
-                   tagName = source.substring(tagStart + 2).replace(/[\s<].*/, ''); //console.error('#@@@@@@'+tagName)
+         tooltip.content(function () {
+           var heading = _heading.apply(this, arguments);
 
-                   errorHandler.error("end tag name: " + tagName + ' is not complete:' + config.tagName);
-                   end = tagStart + 1 + tagName.length;
-                 } else if (tagName.match(/\s</)) {
-                   tagName = tagName.replace(/[\s<].*/, '');
-                   errorHandler.error("end tag name: " + tagName + ' maybe not complete');
-                   end = tagStart + 1 + tagName.length;
-                 } //console.error(parseStack.length,parseStack)
-                 //console.error(config);
+           var text = _title.apply(this, arguments);
 
+           var keys = _keys.apply(this, arguments);
 
-                 var localNSMap = config.localNSMap;
-                 var endMatch = config.tagName == tagName;
-                 var endIgnoreCaseMach = endMatch || config.tagName && config.tagName.toLowerCase() == tagName.toLowerCase();
+           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;
+       }
 
-                 if (endIgnoreCaseMach) {
-                   domBuilder.endElement(config.uri, config.localName, tagName);
+       function uiEditMenu(context) {
+         var dispatch = dispatch$8('toggled');
 
-                   if (localNSMap) {
-                     for (var prefix in localNSMap) {
-                       domBuilder.endPrefixMapping(prefix);
-                     }
-                   }
+         var _menu = select(null);
 
-                   if (!endMatch) {
-                     errorHandler.fatalError("end tag name: " + tagName + ' is not match the current start tagName:' + config.tagName);
-                   }
-                 } else {
-                   parseStack.push(config);
-                 }
+         var _operations = []; // the position the menu should be displayed relative to
 
-                 end++;
-                 break;
-               // end elment
+         var _anchorLoc = [0, 0];
+         var _anchorLocLonLat = [0, 0]; // a string indicating how the menu was opened
 
-               case '?':
-                 // <?...?>
-                 locator && position(tagStart);
-                 end = parseInstruction(source, tagStart, domBuilder);
-                 break;
+         var _triggerType = '';
+         var _vpTopMargin = 85; // viewport top margin
 
-               case '!':
-                 // <!doctype,<![CDATA,<!--
-                 locator && position(tagStart);
-                 end = parseDCC(source, tagStart, domBuilder, errorHandler);
-                 break;
+         var _vpBottomMargin = 45; // viewport bottom margin
 
-               default:
-                 locator && position(tagStart);
-                 var el = new ElementAttributes();
-                 var currentNSMap = parseStack[parseStack.length - 1].currentNSMap; //elStartEnd
+         var _vpSideMargin = 35; // viewport side margin
 
-                 var end = parseElementStartPart(source, tagStart, el, currentNSMap, entityReplacer, errorHandler);
-                 var len = el.length;
+         var _menuTop = false;
 
-                 if (!el.closed && fixSelfClosed(source, end, el.tagName, closeMap)) {
-                   el.closed = true;
+         var _menuHeight;
 
-                   if (!entityMap.nbsp) {
-                     errorHandler.warning('unclosed xml attribute');
-                   }
-                 }
+         var _menuWidth; // hardcode these values to make menu positioning easier
 
-                 if (locator && len) {
-                   var locator2 = copyLocator(locator, {}); //try{//attribute position fixed
 
-                   for (var i = 0; i < len; i++) {
-                     var a = el[i];
-                     position(a.offset);
-                     a.locator = copyLocator(locator, {});
-                   } //}catch(e){console.error('@@@@@'+e)}
+         var _verticalPadding = 4; // see also `.edit-menu .tooltip` CSS; include margin
 
+         var _tooltipWidth = 210; // offset the menu slightly from the target location
 
-                   domBuilder.locator = locator2;
+         var _menuSideMargin = 10;
+         var _tooltips = [];
 
-                   if (appendElement(el, domBuilder, currentNSMap)) {
-                     parseStack.push(el);
-                   }
+         var editMenu = function editMenu(selection) {
+           var isTouchMenu = _triggerType.includes('touch') || _triggerType.includes('pen');
 
-                   domBuilder.locator = locator;
-                 } else {
-                   if (appendElement(el, domBuilder, currentNSMap)) {
-                     parseStack.push(el);
-                   }
-                 }
+           var ops = _operations.filter(function (op) {
+             return !isTouchMenu || !op.mouseOnly;
+           });
 
-                 if (el.uri === 'http://www.w3.org/1999/xhtml' && !el.closed) {
-                   end = parseHtmlSpecialContent(source, end, el.tagName, entityReplacer, domBuilder);
-                 } else {
-                   end++;
-                 }
+           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
 
-             }
-           } catch (e) {
-             errorHandler.error('element parse error: ' + e); //errorHandler.error('element parse error: '+e);
+           _menuTop = isTouchMenu; // Show labels for touch input since there aren't hover tooltips
 
-             end = -1; //throw e;
-           }
+           var showLabels = isTouchMenu;
+           var buttonHeight = showLabels ? 32 : 34;
 
-           if (end > start) {
-             start = end;
+           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 {
-             //TODO: 这里有可能sax回退,有位置错误风险
-             appendText(Math.max(tagStart, start) + 1);
+             _menuWidth = 44;
            }
-         }
-       }
-
-       function copyLocator(f, t) {
-         t.lineNumber = f.lineNumber;
-         t.columnNumber = f.columnNumber;
-         return t;
-       }
-       /**
-        * @see #appendElement(source,elStartEnd,el,selfClosed,entityReplacer,domBuilder,parseStack);
-        * @return end of the elementStartPart(end of elementEndPart for selfClosed el)
-        */
 
+           _menuHeight = _verticalPadding * 2 + ops.length * buttonHeight;
+           _menu = selection.append('div').attr('class', 'edit-menu').classed('touch-menu', isTouchMenu).style('padding', _verticalPadding + 'px 0');
 
-       function parseElementStartPart(source, start, el, currentNSMap, entityReplacer, errorHandler) {
-         var attrName;
-         var value;
-         var p = ++start;
-         var s = S_TAG; //status
-
-         while (true) {
-           var c = source.charAt(p);
-
-           switch (c) {
-             case '=':
-               if (s === S_ATTR) {
-                 //attrName
-                 attrName = source.slice(start, p);
-                 s = S_EQ;
-               } else if (s === S_ATTR_SPACE) {
-                 s = S_EQ;
-               } else {
-                 //fatalError: equal must after attrName or space after attrName
-                 throw new Error('attribute equal must after attrName');
-               }
+           var buttons = _menu.selectAll('.edit-menu-item').data(ops); // enter
 
-               break;
 
-             case '\'':
-             case '"':
-               if (s === S_EQ || s === S_ATTR //|| s == S_ATTR_SPACE
-               ) {
-                   //equal
-                   if (s === S_ATTR) {
-                     errorHandler.warning('attribute value must after "="');
-                     attrName = source.slice(start, p);
-                   }
+           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]]);
 
-                   start = p + 1;
-                   p = source.indexOf(c, start);
+             _tooltips.push(tooltip);
 
-                   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)
+             select(this).call(tooltip).append('div').attr('class', 'icon-wrap').call(svgIcon('#iD-operation-' + d.id, 'operation'));
+           });
 
-                 el.add(attrName, value, start); //console.dir(el)
+           if (showLabels) {
+             buttonsEnter.append('span').attr('class', 'label').html(function (d) {
+               return d.title;
+             });
+           } // update
 
-                 errorHandler.warning('attribute "' + attrName + '" missed start quot(' + c + ')!!');
-                 start = p + 1;
-                 s = S_ATTR_END;
-               } else {
-                 //fatalError: no equal before
-                 throw new Error('attribute value must after "="');
-               }
 
-               break;
+           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`
 
-             case '/':
-               switch (s) {
-                 case S_TAG:
-                   el.setTagName(source.slice(start, p));
+           function pointerup(d3_event) {
+             lastPointerUpType = d3_event.pointerType;
+           }
 
-                 case S_ATTR_END:
-                 case S_TAG_SPACE:
-                 case S_TAG_CLOSE:
-                   s = S_TAG_CLOSE;
-                   el.closed = true;
+           function click(d3_event, operation) {
+             d3_event.stopPropagation();
 
-                 case S_ATTR_NOQUOT_VALUE:
-                 case S_ATTR:
-                 case S_ATTR_SPACE:
-                   break;
-                 //case S_EQ:
+             if (operation.relatedEntityIds) {
+               utilHighlightEntities(operation.relatedEntityIds(), false, context);
+             }
 
-                 default:
-                   throw new Error("attribute invalid close char('/')");
+             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)();
                }
 
-               break;
-
-             case '':
-               //end document
-               //throw new Error('unexpected end of input')
-               errorHandler.error('unexpected end of input');
+               operation();
+               editMenu.close();
+             }
 
-               if (s == S_TAG) {
-                 el.setTagName(source.slice(start, p));
-               }
+             lastPointerUpType = null;
+           }
 
-               return p;
+           dispatch.call('toggled', this, true);
+         };
 
-             case '>':
-               switch (s) {
-                 case S_TAG:
-                   el.setTagName(source.slice(start, p));
+         function updatePosition() {
+           if (!_menu || _menu.empty()) return;
+           var anchorLoc = context.projection(_anchorLocLonLat);
+           var viewport = context.surfaceRect();
 
-                 case S_ATTR_END:
-                 case S_TAG_SPACE:
-                 case S_TAG_CLOSE:
-                   break;
-                 //normal
+           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;
+           }
 
-                 case S_ATTR_NOQUOT_VALUE: //Compatible state
+           var menuLeft = displayOnLeft(viewport);
+           var offset = [0, 0];
+           offset[0] = menuLeft ? -1 * (_menuSideMargin + _menuWidth) : _menuSideMargin;
 
-                 case S_ATTR:
-                   value = source.slice(start, p);
+           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 (value.slice(-1) === '/') {
-                     el.closed = true;
-                     value = value.slice(0, -1);
-                   }
+           var origin = geoVecAdd(anchorLoc, offset);
 
-                 case S_ATTR_SPACE:
-                   if (s === S_ATTR_SPACE) {
-                     value = attrName;
-                   }
+           _menu.style('left', origin[0] + 'px').style('top', origin[1] + 'px');
 
-                   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!!');
-                     }
+           var tooltipSide = tooltipPosition(viewport, menuLeft);
 
-                     el.add(value, value, start);
-                   }
+           _tooltips.forEach(function (tooltip) {
+             tooltip.placement(tooltipSide);
+           });
 
-                   break;
+           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
 
-                 case S_EQ:
-                   throw new Error('attribute value missed!!');
-               } //                    console.log(tagName,tagNamePattern,tagNamePattern.test(tagName))
 
+               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 p;
 
-             /*xml space '\x20' | #x9 | #xD | #xA; */
+               return true;
+             }
+           }
 
-             case "\x80":
-               c = ' ';
+           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';
+               }
 
-             default:
-               if (c <= ' ') {
-                 //space
-                 switch (s) {
-                   case S_TAG:
-                     el.setTagName(source.slice(start, p)); //tagName
+               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
 
-                     s = S_TAG_SPACE;
-                     break;
 
-                   case S_ATTR:
-                     attrName = source.slice(start, p);
-                     s = S_ATTR_SPACE;
-                     break;
+               return 'right';
+             } else {
+               // rtl
+               if (!menuLeft) {
+                 return 'right';
+               }
 
-                   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);
+               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
 
-                   case S_ATTR_END:
-                     s = S_TAG_SPACE;
-                     break;
-                   //case S_TAG_SPACE:
-                   //case S_EQ:
-                   //case S_ATTR_SPACE:
-                   //  void();break;
-                   //case S_TAG_CLOSE:
-                   //ignore warning
-                 }
-               } else {
-                 //not space
-                 //S_TAG,      S_ATTR, S_EQ,   S_ATTR_NOQUOT_VALUE
-                 //S_ATTR_SPACE,       S_ATTR_END,     S_TAG_SPACE, S_TAG_CLOSE
-                 switch (s) {
-                   //case S_TAG:void();break;
-                   //case S_ATTR:void();break;
-                   //case S_ATTR_NOQUOT_VALUE:void();break;
-                   case S_ATTR_SPACE:
-                     var tagName = el.tagName;
-
-                     if (currentNSMap[''] !== 'http://www.w3.org/1999/xhtml' || !attrName.match(/^(?:disabled|checked|selected)$/i)) {
-                       errorHandler.warning('attribute "' + attrName + '" missed value!! "' + attrName + '" instead2!!');
-                     }
 
-                     el.add(attrName, attrName, start);
-                     start = p;
-                     s = S_ATTR;
-                     break;
+               return 'left';
+             }
+           }
+         }
 
-                   case S_ATTR_END:
-                     errorHandler.warning('attribute space is required"' + attrName + '"!!');
+         editMenu.close = function () {
+           context.map().on('move.edit-menu', null).on('drawn.edit-menu', null);
 
-                   case S_TAG_SPACE:
-                     s = S_ATTR;
-                     start = p;
-                     break;
+           _menu.remove();
 
-                   case S_EQ:
-                     s = S_ATTR_NOQUOT_VALUE;
-                     start = p;
-                     break;
+           _tooltips = [];
+           dispatch.call('toggled', this, false);
+         };
 
-                   case S_TAG_CLOSE:
-                     throw new Error("elements closed character '/' and '>' must be connected to");
-                 }
-               }
+         editMenu.anchorLoc = function (val) {
+           if (!arguments.length) return _anchorLoc;
+           _anchorLoc = val;
+           _anchorLocLonLat = context.projection.invert(_anchorLoc);
+           return editMenu;
+         };
 
-           } //end outer switch
-           //console.log('p++',p)
+         editMenu.triggerType = function (val) {
+           if (!arguments.length) return _triggerType;
+           _triggerType = val;
+           return editMenu;
+         };
 
+         editMenu.operations = function (val) {
+           if (!arguments.length) return _operations;
+           _operations = val;
+           return editMenu;
+         };
 
-           p++;
-         }
+         return utilRebind(editMenu, dispatch, 'on');
        }
-       /**
-        * @return true if has new namespace define
-        */
 
+       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 appendElement(el, domBuilder, currentNSMap) {
-         var tagName = el.tagName;
-         var localNSMap = null; //var currentNSMap = parseStack[parseStack.length-1].currentNSMap;
-
-         var i = el.length;
+             return null;
+           }).filter(Boolean);
+           selection.html('');
 
-         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 !== ''
+           if (hiddenList.length) {
+             var tooltipBehavior = uiTooltip().placement('top').title(function () {
+               return hiddenList.join('<br/>');
+             });
+             selection.append('a').attr('class', 'chip').attr('href', '#').html(_t.html('feature_info.hidden_warning', {
+               count: count
+             })).call(tooltipBehavior).on('click', function (d3_event) {
+               tooltipBehavior.hide();
+               d3_event.preventDefault(); // open the Map Data pane
 
+               context.ui().togglePanes(context.container().select('.map-panes .map-data-pane'));
+             });
+           }
 
-           a.localName = localName; //prefix == null for no ns prefix attribute 
+           selection.classed('hide', !hiddenList.length);
+         }
 
-           if (nsPrefix !== false) {
-             //hack!!
-             if (localNSMap == null) {
-               localNSMap = {}; //console.log(currentNSMap,0)
+         return function (selection) {
+           update(selection);
+           context.features().on('change.feature_info', function () {
+             update(selection);
+           });
+         };
+       }
 
-               _copy(currentNSMap, currentNSMap = {}); //console.log(currentNSMap,1)
+       function uiFlash(context) {
+         var _flashTimer;
 
-             }
+         var _duration = 2000;
+         var _iconName = '#iD-icon-no';
+         var _iconClass = 'disabled';
+         var _label = '';
 
-             currentNSMap[nsPrefix] = localNSMap[nsPrefix] = value;
-             a.uri = 'http://www.w3.org/2000/xmlns/';
-             domBuilder.startPrefixMapping(nsPrefix, value);
+         function flash() {
+           if (_flashTimer) {
+             _flashTimer.stop();
            }
-         }
-
-         var i = el.length;
 
-         while (i--) {
-           a = el[i];
-           var prefix = a.prefix;
+           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 (prefix) {
-             //no prefix attribute has no namespace
-             if (prefix === 'xml') {
-               a.uri = 'http://www.w3.org/XML/1998/namespace';
-             }
+           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 (prefix !== 'xmlns') {
-               a.uri = currentNSMap[prefix || '']; //{console.log('###'+a.qName,domBuilder.locator.systemId+'',currentNSMap,a.uri)}
-             }
-           }
+           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;
          }
 
-         var nsp = tagName.indexOf(':');
+         flash.duration = function (_) {
+           if (!arguments.length) return _duration;
+           _duration = _;
+           return flash;
+         };
 
-         if (nsp > 0) {
-           prefix = el.prefix = tagName.slice(0, nsp);
-           localName = el.localName = tagName.slice(nsp + 1);
-         } else {
-           prefix = null; //important!!
+         flash.label = function (_) {
+           if (!arguments.length) return _label;
+           _label = _;
+           return flash;
+         };
 
-           localName = el.localName = tagName;
-         } //no prefix element has default namespace
+         flash.iconName = function (_) {
+           if (!arguments.length) return _iconName;
+           _iconName = _;
+           return flash;
+         };
 
+         flash.iconClass = function (_) {
+           if (!arguments.length) return _iconClass;
+           _iconClass = _;
+           return flash;
+         };
 
-         var ns = el.uri = currentNSMap[prefix || ''];
-         domBuilder.startElement(ns, localName, tagName, el); //endPrefixMapping and startPrefixMapping have not any help for dom builder
-         //localNSMap = null
+         return flash;
+       }
 
-         if (el.closed) {
-           domBuilder.endElement(ns, localName, tagName);
+       function uiFullScreen(context) {
+         var element = context.container().node(); // var button = d3_select(null);
 
-           if (localNSMap) {
-             for (prefix in localNSMap) {
-               domBuilder.endPrefixMapping(prefix);
-             }
+         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;
            }
-         } else {
-           el.currentNSMap = currentNSMap;
-           el.localNSMap = localNSMap; //parseStack.push(el);
-
-           return true;
          }
-       }
-
-       function parseHtmlSpecialContent(source, elStartEnd, tagName, entityReplacer, domBuilder) {
-         if (/^(?:script|textarea)$/i.test(tagName)) {
-           var elEndStart = source.indexOf('</' + tagName + '>', elStartEnd);
-           var text = source.substring(elStartEnd + 1, elEndStart);
-
-           if (/[&<]/.test(text)) {
-             if (/^script$/i.test(tagName)) {
-               //if(!/\]\]>/.test(text)){
-               //lexHandler.startCDATA();
-               domBuilder.characters(text, 0, text.length); //lexHandler.endCDATA();
-
-               return elEndStart; //}
-             } //}else{//text area
 
-
-             text = text.replace(/&#?\w+;/g, entityReplacer);
-             domBuilder.characters(text, 0, text.length);
-             return elEndStart; //}
+         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;
            }
          }
 
-         return elStartEnd + 1;
-       }
+         function isFullScreen() {
+           return document.fullscreenElement || document.mozFullScreenElement || document.webkitFullscreenElement || document.msFullscreenElement;
+         }
 
-       function fixSelfClosed(source, elStartEnd, tagName, closeMap) {
-         //if(tagName in closeMap){
-         var pos = closeMap[tagName];
+         function isSupported() {
+           return !!getFullScreenFn();
+         }
 
-         if (pos == null) {
-           //console.log(tagName)
-           pos = source.lastIndexOf('</' + tagName + '>');
+         function fullScreen(d3_event) {
+           d3_event.preventDefault();
 
-           if (pos < elStartEnd) {
-             //忘记闭合
-             pos = source.lastIndexOf('</' + tagName);
+           if (!isFullScreen()) {
+             // button.classed('active', true);
+             getFullScreenFn().apply(element);
+           } else {
+             // button.classed('active', false);
+             getExitFullScreenFn().apply(document);
            }
-
-           closeMap[tagName] = pos;
          }
 
-         return pos < elStartEnd; //} 
-       }
+         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 _copy(source, target) {
-         for (var n in source) {
-           target[n] = source[n];
-         }
+           var detected = utilDetect();
+           var keys = detected.os === 'mac' ? [uiCmd('⌃⌘F'), 'f11'] : ['f11'];
+           context.keybinding().on(keys, fullScreen);
+         };
        }
 
-       function parseDCC(source, start, domBuilder, errorHandler) {
-         //sure start with '<!'
-         var next = source.charAt(start + 2);
-
-         switch (next) {
-           case '-':
-             if (source.charAt(start + 3) === '-') {
-               var end = source.indexOf('-->', start + 4); //append comment source.substring(4,end)//<!--
+       function uiGeolocate(context) {
+         var _geolocationOptions = {
+           // prioritize speed and power usage over precision
+           enableHighAccuracy: false,
+           // don't hang indefinitely getting the location
+           timeout: 6000 // 6sec
 
-               if (end > start) {
-                 domBuilder.comment(source, start + 4, end - start - 4);
-                 return end + 3;
-               } else {
-                 errorHandler.error("Unclosed comment");
-                 return -1;
-               }
-             } else {
-               //error
-               return -1;
-             }
+         };
 
-           default:
-             if (source.substr(start + 3, 6) == 'CDATA[') {
-               var end = source.indexOf(']]>', start + 9);
-               domBuilder.startCDATA();
-               domBuilder.characters(source, start + 9, end - start - 9);
-               domBuilder.endCDATA();
-               return end + 3;
-             } //<!DOCTYPE
-             //startDTD(java.lang.String name, java.lang.String publicId, java.lang.String systemId) 
+         var _locating = uiLoading(context).message(_t.html('geolocate.locating')).blocking(true);
 
+         var _layer = context.layers().layer('geolocate');
 
-             var matchs = split$1(source, start);
-             var len = matchs.length;
+         var _position;
 
-             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;
-             }
+         var _extent;
 
-         }
+         var _timeoutID;
 
-         return -1;
-       }
+         var _button = select(null);
 
-       function parseInstruction(source, start, domBuilder) {
-         var end = source.indexOf('?>', start);
+         function click() {
+           if (context.inIntro()) return;
 
-         if (end) {
-           var match = source.substring(start, end).match(/^<\?(\S*)\s*([\s\S]*?)\s*$/);
+           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 (match) {
-             var len = match[0].length;
-             domBuilder.processingInstruction(match[1], match[2]);
-             return end + 2;
+             navigator.geolocation.getCurrentPosition(success, error, _geolocationOptions);
            } else {
-             //error
-             return -1;
+             _locating.close();
+
+             _layer.enabled(null, false);
+
+             updateButtonState();
            }
          }
 
-         return -1;
-       }
-       /**
-        * @param source
-        */
+         function zoomTo() {
+           context.enter(modeBrowse(context));
+           var map = context.map();
 
+           _layer.enabled(_position, true);
 
-       function ElementAttributes(source) {}
+           updateButtonState();
+           map.centerZoomEase(_extent.center(), Math.min(20, map.extentZoom(_extent)));
+         }
 
-       ElementAttributes.prototype = {
-         setTagName: function setTagName(tagName) {
-           if (!tagNamePattern.test(tagName)) {
-             throw new Error('invalid tagName:' + tagName);
-           }
+         function success(geolocation) {
+           _position = geolocation;
+           var coords = _position.coords;
+           _extent = geoExtent([coords.longitude, coords.latitude]).padByMeters(coords.accuracy);
+           zoomTo();
+           finish();
+         }
 
-           this.tagName = tagName;
-         },
-         add: function add(qName, value, offset) {
-           if (!tagNamePattern.test(qName)) {
-             throw new Error('invalid attribute:' + qName);
+         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')();
            }
 
-           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){},
-
-       };
+           finish();
+         }
 
-       function _set_proto_(thiz, parent) {
-         thiz.__proto__ = parent;
-         return thiz;
-       }
+         function finish() {
+           _locating.close(); // unblock ui
 
-       if (!(_set_proto_({}, _set_proto_.prototype) instanceof _set_proto_)) {
-         _set_proto_ = function _set_proto_(thiz, parent) {
-           function p() {}
-           p.prototype = parent;
-           p = new p();
 
-           for (parent in thiz) {
-             p[parent] = thiz[parent];
+           if (_timeoutID) {
+             clearTimeout(_timeoutID);
            }
 
-           return p;
-         };
-       }
-
-       function split$1(source, start) {
-         var match;
-         var buf = [];
-         var reg = /'[^']+'|"[^"]+"|[^\s<>\/=]+=?|(\/?\s*>|<)/g;
-         reg.lastIndex = start;
-         reg.exec(source); //skip <
-
-         while (match = reg.exec(source)) {
-           buf.push(match);
-           if (match[1]) return buf;
+           _timeoutID = undefined;
          }
-       }
 
-       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];
+         function updateButtonState() {
+           _button.classed('active', _layer.enabled());
          }
-       }
-       /**
-       ^\w+\.prototype\.([_\w]+)\s*=\s*((?:.*\{\s*?[\r\n][\s\S]*?^})|\S.*?(?=[;\r\n]));?
-       ^\w+\.prototype\.([_\w]+)\s*=\s*(\S.*?(?=[;\r\n]));?
-        */
-
 
-       function _extends(Class, Super) {
-         var pt = Class.prototype;
+         return function (selection) {
+           if (!navigator.geolocation || !navigator.geolocation.getCurrentPosition) return;
+           _button = selection.append('button').on('click', click).call(svgIcon('#iD-icon-geolocate', 'light')).call(uiTooltip().placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left').title(_t.html('geolocate.title')).keys([_t('geolocate.key')]));
+           context.keybinding().on(_t('geolocate.key'), click);
+         };
+       }
 
-         if (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);
-         }
+       function uiPanelBackground(context) {
+         var background = context.background();
+         var _currSourceName = null;
+         var _metadata = {};
+         var _metadataKeys = ['zoom', 'vintage', 'source', 'description', 'resolution', 'accuracy'];
 
-         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 debouncedRedraw = debounce(redraw, 250);
 
-       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,
+         function redraw(selection) {
+           var source = background.baseLayerSource();
+           if (!source) return;
+           var isDG = source.id.match(/^DigitalGlobe/i) !== null;
+           var sourceLabel = source.label();
 
-         /**
-          * 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 (_currSourceName !== sourceLabel) {
+             _currSourceName = sourceLabel;
+             _metadata = {};
            }
 
-           return buf.join('');
-         }
-       };
-
-       function LiveNodeList(node, refresh) {
-         this._node = node;
-         this._refresh = refresh;
+           selection.html('');
+           var list = selection.append('ul').attr('class', 'background-info');
+           list.append('li').html(_currSourceName);
 
-         _updateLiveList(this);
-       }
+           _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]);
+           });
 
-       function _updateLiveList(list) {
-         var inc = list._node._inc || list._node.ownerDocument._inc;
+           debouncedGetMetadata(selection);
+           var toggleTiles = context.getDebug('tile') ? 'hide_tiles' : 'show_tiles';
+           selection.append('a').html(_t.html('info_panels.background.' + toggleTiles)).attr('href', '#').attr('class', 'button button-toggle-tiles').on('click', function (d3_event) {
+             d3_event.preventDefault();
+             context.setDebug('tile', !context.getDebug('tile'));
+             selection.call(redraw);
+           });
 
-         if (list._inc != inc) {
-           var ls = list._refresh(list._node); //console.log(ls.length)
+           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
 
 
-           __set__(list, 'length', ls.length);
+           ['DigitalGlobe-Premium', 'DigitalGlobe-Standard'].forEach(function (layerId) {
+             if (source.id !== layerId) {
+               var key = layerId + '-vintage';
+               var sourceVintage = context.background().findSource(key);
 
-           copy$1(ls, list);
-           list._inc = inc;
+               if (context.background().showsLayer(sourceVintage)) {
+                 context.background().toggleOverlayLayer(sourceVintage);
+               }
+             }
+           });
          }
-       }
 
-       LiveNodeList.prototype.item = function (i) {
-         _updateLiveList(this);
+         var debouncedGetMetadata = debounce(getMetadata, 250);
 
-         return this[i];
-       };
+         function getMetadata(selection) {
+           var tile = context.container().select('.layer-background img.tile-center'); // tile near viewport center
 
-       _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 (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').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 NamedNodeMap() {}
+             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
 
-       function _findNodeIndex(list, node) {
-         var i = list.length;
+             _metadataKeys.forEach(function (k) {
+               if (k === 'zoom' || k === 'vintage') return; // done already
 
-         while (i--) {
-           if (list[i] === node) {
-             return i;
-           }
+               var val = result[k];
+               _metadata[k] = val;
+               selection.selectAll('.background-info-list-' + k).classed('hide', !val).selectAll('.background-info-span-' + k).html(val);
+             });
+           });
          }
-       }
 
-       function _addNamedNode(el, list, newAttr, oldAttr) {
-         if (oldAttr) {
-           list[_findNodeIndex(list, oldAttr)] = newAttr;
-         } else {
-           list[list.length++] = newAttr;
-         }
+         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);
+         };
 
-         if (el) {
-           newAttr.ownerElement = el;
-           var doc = el.ownerDocument;
+         panel.id = 'background';
+         panel.label = _t.html('info_panels.background.title');
+         panel.key = _t('info_panels.background.key');
+         return panel;
+       }
 
-           if (doc) {
-             oldAttr && _onRemoveAttribute(doc, el, oldAttr);
+       function uiPanelHistory(context) {
+         var osm;
 
-             _onAddAttribute(doc, el, newAttr);
-           }
+         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);
          }
-       }
 
-       function _removeNamedNode(el, list, attr) {
-         //console.log('remove attr:'+attr)
-         var i = _findNodeIndex(list, attr);
+         function displayUser(selection, userName) {
+           if (!userName) {
+             selection.append('span').html(_t.html('info_panels.history.unknown'));
+             return;
+           }
 
-         if (i >= 0) {
-           var lastIndex = list.length - 1;
+           selection.append('span').attr('class', 'user-name').html(userName);
+           var links = selection.append('div').attr('class', 'links');
 
-           while (i < lastIndex) {
-             list[i] = list[++i];
+           if (osm) {
+             links.append('a').attr('class', 'user-osm-link').attr('href', osm.userURL(userName)).attr('target', '_blank').html('OSM');
            }
 
-           list.length = lastIndex;
+           links.append('a').attr('class', 'user-hdyc-link').attr('href', 'https://hdyc.neis-one.org/?' + userName).attr('target', '_blank').attr('tabindex', -1).html('HDYC');
+         }
 
-           if (el) {
-             var doc = el.ownerDocument;
+         function displayChangeset(selection, changeset) {
+           if (!changeset) {
+             selection.append('span').html(_t.html('info_panels.history.unknown'));
+             return;
+           }
 
-             if (doc) {
-               _onRemoveAttribute(doc, el, attr);
+           selection.append('span').attr('class', 'changeset-id').html(changeset);
+           var links = selection.append('div').attr('class', 'links');
 
-               attr.ownerElement = null;
-             }
+           if (osm) {
+             links.append('a').attr('class', 'changeset-osm-link').attr('href', osm.changesetURL(changeset)).attr('target', '_blank').html('OSM');
            }
-         } else {
-           throw DOMException$2(NOT_FOUND_ERR, new Error(el.tagName + '@' + attr));
+
+           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');
          }
-       }
 
-       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;
+         function redraw(selection) {
+           var selectedNoteID = context.selectedNoteID();
+           osm = context.connection();
+           var selected, note, entity;
 
-           while (i--) {
-             var attr = this[i]; //console.log(attr.nodeName,key)
+           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 (attr.nodeName == key) {
-               return attr;
+             if (selected.length) {
+               entity = context.entity(selected[0]);
              }
            }
-         },
-         setNamedItem: function setNamedItem(attr) {
-           var el = attr.ownerElement;
-
-           if (el && el != this._ownerElement) {
-             throw new DOMException$2(INUSE_ATTRIBUTE_ERR);
-           }
-
-           var oldAttr = this.getNamedItem(attr.nodeName);
 
-           _addNamedNode(this._ownerElement, this, attr, oldAttr);
-
-           return oldAttr;
-         },
+           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;
 
-         /* returns Node */
-         setNamedItemNS: function setNamedItemNS(attr) {
-           // raises: WRONG_DOCUMENT_ERR,NO_MODIFICATION_ALLOWED_ERR,INUSE_ATTRIBUTE_ERR
-           var el = attr.ownerElement,
-               oldAttr;
+           if (entity) {
+             selection.call(redrawEntity, entity);
+           } else if (note) {
+             selection.call(redrawNote, note);
+           }
+         }
 
-           if (el && el != this._ownerElement) {
-             throw new DOMException$2(INUSE_ATTRIBUTE_ERR);
+         function redrawNote(selection, note) {
+           if (!note || note.isNew()) {
+             selection.append('div').html(_t.html('info_panels.history.note_no_history'));
+             return;
            }
 
-           oldAttr = this.getNamedItemNS(attr.namespaceURI, attr.localName);
+           var list = selection.append('ul');
+           list.append('li').html(_t.html('info_panels.history.note_comments') + ':').append('span').html(note.comments.length);
 
-           _addNamedNode(this._ownerElement, this, attr, oldAttr);
+           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);
+           }
 
-           return oldAttr;
-         },
+           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'));
+           }
+         }
 
-         /* returns Node */
-         removeNamedItem: function removeNamedItem(key) {
-           var attr = this.getNamedItem(key);
+         function redrawEntity(selection, entity) {
+           if (!entity || entity.isNew()) {
+             selection.append('div').html(_t.html('info_panels.history.no_history'));
+             return;
+           }
 
-           _removeNamedNode(this._ownerElement, this, attr);
+           var links = selection.append('div').attr('class', 'links');
 
-           return attr;
-         },
-         // raises: NOT_FOUND_ERR,NO_MODIFICATION_ALLOWED_ERR
-         //for level2
-         removeNamedItemNS: function removeNamedItemNS(namespaceURI, localName) {
-           var attr = this.getNamedItemNS(namespaceURI, localName);
+           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');
+           }
 
-           _removeNamedNode(this._ownerElement, this, attr);
+           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);
+         }
 
-           return attr;
-         },
-         getNamedItemNS: function getNamedItemNS(namespaceURI, localName) {
-           var i = this.length;
+         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);
+           });
+         };
 
-           while (i--) {
-             var node = this[i];
+         panel.off = function () {
+           context.map().on('drawn.info-history', null);
+           context.on('enter.info-history', null);
+         };
 
-             if (node.localName == localName && node.namespaceURI == namespaceURI) {
-               return node;
-             }
-           }
+         panel.id = 'history';
+         panel.label = _t.html('info_panels.history.title');
+         panel.key = _t('info_panels.history.key');
+         return panel;
+       }
 
-           return null;
-         }
-       };
+       var OSM_PRECISION = 7;
        /**
-        * @see http://www.w3.org/TR/REC-DOM-Level-1/level-one-core.html#ID-102161490
+        * Returns a localized representation of the given length measurement.
+        *
+        * @param {Number} m area in meters
+        * @param {Boolean} isImperial true for U.S. customary units; false for metric
         */
 
-       function DOMImplementation(
-       /* Object */
-       features) {
-         this._features = {};
-
-         if (features) {
-           for (var feature in features) {
-             this._features = features[feature];
-           }
-         }
-       }
-       DOMImplementation.prototype = {
-         hasFeature: function hasFeature(
-         /* string */
-         feature,
-         /* string */
-         version) {
-           var versions = this._features[feature.toLowerCase()];
+       function displayLength(m, isImperial) {
+         var d = m * (isImperial ? 3.28084 : 1);
+         var unit;
 
-           if (versions && (!version || version in versions)) {
-             return true;
+         if (isImperial) {
+           if (d >= 5280) {
+             d /= 5280;
+             unit = 'miles';
            } 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;
-
-           if (doctype) {
-             doc.appendChild(doctype);
+             unit = 'feet';
            }
-
-           if (qualifiedName) {
-             var root = doc.createElementNS(namespaceURI, qualifiedName);
-             doc.appendChild(root);
+         } else {
+           if (d >= 1000) {
+             d /= 1000;
+             unit = 'kilometers';
+           } else {
+             unit = 'meters';
            }
-
-           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;
-
-           return node;
          }
-       };
+
+         return _t('units.' + unit, {
+           quantity: d.toLocaleString(_mainLocalizer.localeCode(), {
+             maximumSignificantDigits: 4
+           })
+         });
+       }
        /**
-        * @see http://www.w3.org/TR/2000/REC-DOM-Level-2-Core-20001113/core.html#ID-1950641247
+        * 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 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;
-             }
-           }
-         },
-         // 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)
-
-             if (map) {
-               for (var n in map) {
-                 if (map[n] == namespaceURI) {
-                   return n;
-                 }
-               }
-             }
+       function displayArea(m2, isImperial) {
+         var locale = _mainLocalizer.localeCode();
+         var d = m2 * (isImperial ? 10.7639111056 : 1);
+         var d1, d2, area;
+         var unit1 = '';
+         var unit2 = '';
 
-             el = el.nodeType == ATTRIBUTE_NODE ? el.ownerDocument : el.parentNode;
+         if (isImperial) {
+           if (d >= 6969600) {
+             // > 0.25mi² show mi²
+             d1 = d / 27878400;
+             unit1 = 'square_miles';
+           } else {
+             d1 = d;
+             unit1 = 'square_feet';
            }
 
-           return null;
-         },
-         // Introduced in DOM Level 3:
-         lookupNamespaceURI: function lookupNamespaceURI(prefix) {
-           var el = this;
-
-           while (el) {
-             var map = el._nsMap; //console.dir(map)
-
-             if (map) {
-               if (prefix in map) {
-                 return map[prefix];
-               }
-             }
+           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';
+           }
 
-             el = el.nodeType == ATTRIBUTE_NODE ? el.ownerDocument : el.parentNode;
+           if (d > 1000 && d < 10000000) {
+             // 0.1 - 1000 hectares
+             d2 = d / 10000;
+             unit2 = 'hectares';
            }
+         }
 
-           return null;
-         },
-         // Introduced in DOM Level 3:
-         isDefaultNamespace: function isDefaultNamespace(namespaceURI) {
-           var prefix = this.lookupPrefix(namespaceURI);
-           return prefix == null;
+         area = _t('units.' + unit1, {
+           quantity: d1.toLocaleString(locale, {
+             maximumSignificantDigits: 4
+           })
+         });
+
+         if (d2) {
+           return _t('units.area_pair', {
+             area1: area,
+             area2: _t('units.' + unit2, {
+               quantity: d2.toLocaleString(locale, {
+                 maximumSignificantDigits: 2
+               })
+             })
+           });
+         } else {
+           return area;
          }
-       };
+       }
+
+       function wrap(x, min, max) {
+         var d = max - min;
+         return ((x - min) % d + d) % d + min;
+       }
 
-       function _xmlEncoder(c) {
-         return c == '<' && '&lt;' || c == '>' && '&gt;' || c == '&' && '&amp;' || c == '"' && '&quot;' || '&#' + c.charCodeAt() + ';';
+       function clamp(x, min, max) {
+         return Math.max(min, Math.min(x, max));
        }
 
-       copy$1(NodeType, Node);
-       copy$1(NodeType, Node.prototype);
-       /**
-        * @param callback return true for continue,false for break
-        * @return boolean true: break visit;
-        */
+       function displayCoordinate(deg, pos, neg) {
+         var locale = _mainLocalizer.localeCode();
+         var min = (Math.abs(deg) - Math.floor(Math.abs(deg))) * 60;
+         var sec = (min - Math.floor(min)) * 60;
+         var displayDegrees = _t('units.arcdegrees', {
+           quantity: Math.floor(Math.abs(deg)).toLocaleString(locale)
+         });
+         var displayCoordinate;
 
-       function _visitNode(node, callback) {
-         if (callback(node)) {
-           return true;
+         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 (node = node.firstChild) {
-           do {
-             if (_visitNode(node, callback)) {
-               return true;
-             }
-           } while (node = node.nextSibling);
+         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 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 dmsCoordinatePair(coord) {
+         return _t('units.coordinate_pair', {
+           latitude: displayCoordinate(clamp(coord[1], -90, 90), 'north', 'south'),
+           longitude: displayCoordinate(wrap(coord[0], -180, 180), 'east', 'west')
+         });
        }
+       /**
+        * Returns the given coordinate pair in decimal format.
+        * note: unlocalized to avoid comma ambiguity - see #4765
+        *
+        * @param {Array<Number>} coord longitude and latitude
+        */
 
-       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 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 _onUpdateChild(doc, el, newChild) {
-         if (doc && doc._inc) {
-           doc._inc++; //update childNodes
-
-           var cs = el.childNodes;
+       function uiPanelLocation(context) {
+         var currLocation = '';
 
-           if (newChild) {
-             cs[cs.length++] = newChild;
-           } else {
-             //console.log(1)
-             var child = el.firstChild;
-             var i = 0;
+         function redraw(selection) {
+           selection.html('');
+           var list = selection.append('ul'); // Mouse coordinates
 
-             while (child) {
-               cs[i++] = child;
-               child = child.nextSibling;
-             }
+           var coord = context.map().mouseCoordinates();
 
-             cs.length = i;
+           if (coord.some(isNaN)) {
+             coord = context.map().center();
            }
-         }
-       }
-       /**
-        * attributes;
-        * children;
-        * 
-        * writeable properties:
-        * nodeValue,Attr:value,CharacterData:data
-        * prefix
-        */
 
+           list.append('li').html(dmsCoordinatePair(coord)).append('li').html(decimalCoordinatePair(coord)); // Location Info
 
-       function _removeChild(parentNode, child) {
-         var previous = child.previousSibling;
-         var next = child.nextSibling;
-
-         if (previous) {
-           previous.nextSibling = next;
-         } else {
-           parentNode.firstChild = next;
+           selection.append('div').attr('class', 'location-info').html(currLocation || ' ');
+           debouncedGetLocation(selection, coord);
          }
 
-         if (next) {
-           next.previousSibling = previous;
-         } else {
-           parentNode.lastChild = previous;
+         var debouncedGetLocation = debounce(getLocation, 250);
+
+         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);
+             });
+           }
          }
 
-         _onUpdateChild(parentNode.ownerDocument, parentNode);
+         var panel = function panel(selection) {
+           selection.call(redraw);
+           context.surface().on(('PointerEvent' in window ? 'pointer' : 'mouse') + 'move.info-location', function () {
+             selection.call(redraw);
+           });
+         };
+
+         panel.off = function () {
+           context.surface().on('.info-location', null);
+         };
 
-         return child;
+         panel.id = 'location';
+         panel.label = _t.html('info_panels.location.title');
+         panel.key = _t('info_panels.location.key');
+         return panel;
        }
-       /**
-        * preformance key(refChild == null)
-        */
 
+       function uiPanelMeasurement(context) {
+         function radiansToMeters(r) {
+           // using WGS84 authalic radius (6371007.1809 m)
+           return r * 6371007.1809;
+         }
 
-       function _insertBefore(parentNode, newChild, nextChild) {
-         var cp = newChild.parentNode;
-
-         if (cp) {
-           cp.removeChild(newChild); //remove and update
+         function steradiansToSqmeters(r) {
+           // http://gis.stackexchange.com/a/124857/40446
+           return r / (4 * Math.PI) * 510065621724000;
          }
 
-         if (newChild.nodeType === DOCUMENT_FRAGMENT_NODE) {
-           var newFirst = newChild.firstChild;
+         function toLineString(feature) {
+           if (feature.type === 'LineString') return feature;
+           var result = {
+             type: 'LineString',
+             coordinates: []
+           };
 
-           if (newFirst == null) {
-             return newChild;
+           if (feature.type === 'Polygon') {
+             result.coordinates = feature.coordinates[0];
+           } else if (feature.type === 'MultiPolygon') {
+             result.coordinates = feature.coordinates[0][0];
            }
 
-           var newLast = newChild.lastChild;
-         } else {
-           newFirst = newLast = newChild;
+           return result;
          }
 
-         var pre = nextChild ? nextChild.previousSibling : parentNode.lastChild;
-         newFirst.previousSibling = pre;
-         newLast.nextSibling = nextChild;
+         var _isImperial = !_mainLocalizer.usesMetric();
 
-         if (pre) {
-           pre.nextSibling = newFirst;
-         } else {
-           parentNode.firstChild = newFirst;
-         }
+         function redraw(selection) {
+           var graph = context.graph();
+           var selectedNoteID = context.selectedNoteID();
+           var osm = services.osm;
+           var localeCode = _mainLocalizer.localeCode();
+           var heading;
+           var center, location, centroid;
+           var closed, geometry;
+           var totalNodeCount,
+               length = 0,
+               area = 0,
+               distance;
 
-         if (nextChild == null) {
-           parentNode.lastChild = newLast;
-         } else {
-           nextChild.previousSibling = newLast;
-         }
+           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
+             });
 
-         do {
-           newFirst.parentNode = parentNode;
-         } while (newFirst !== newLast && (newFirst = newFirst.nextSibling));
+             if (selected.length) {
+               var extent = geoExtent();
 
-         _onUpdateChild(parentNode.ownerDocument || parentNode, parentNode); //console.log(parentNode.lastChild.nextSibling == null)
+               for (var i in selected) {
+                 var entity = selected[i];
 
+                 extent._extend(entity.extent(graph));
 
-         if (newChild.nodeType == DOCUMENT_FRAGMENT_NODE) {
-           newChild.firstChild = newChild.lastChild = null;
-         }
+                 geometry = entity.geometry(graph);
 
-         return newChild;
-       }
+                 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);
 
-       function _appendSingleChild(parentNode, newChild) {
-         var cp = newChild.parentNode;
+                   if (!centroid || !isFinite(centroid[0]) || !isFinite(centroid[1])) {
+                     centroid = entity.extent(graph).center();
+                   }
 
-         if (cp) {
-           var pre = parentNode.lastChild;
-           cp.removeChild(newChild); //remove and update
+                   if (closed) {
+                     area += steradiansToSqmeters(entity.area(graph));
+                   }
+                 }
+               }
 
-           var pre = parentNode.lastChild;
-         }
+               if (selected.length > 1) {
+                 geometry = null;
+                 closed = null;
+                 centroid = null;
+               }
 
-         var pre = parentNode.lastChild;
-         newChild.parentNode = parentNode;
-         newChild.previousSibling = pre;
-         newChild.nextSibling = null;
+               if (selected.length === 2 && selected[0].type === 'node' && selected[1].type === 'node') {
+                 distance = geoSphericalDistance(selected[0].loc, selected[1].loc);
+               }
 
-         if (pre) {
-           pre.nextSibling = newChild;
-         } else {
-           parentNode.firstChild = newChild;
-         }
+               if (selected.length === 1 && selected[0].type === 'node') {
+                 location = selected[0].loc;
+               } else {
+                 totalNodeCount = utilGetAllNodes(selectedIDs, context.graph()).length;
+               }
 
-         parentNode.lastChild = newChild;
+               if (!location && !centroid) {
+                 center = extent.center();
+               }
+             }
+           }
 
-         _onUpdateChild(parentNode.ownerDocument, parentNode, newChild);
+           selection.html('');
 
-         return newChild; //console.log("__aa",parentNode.lastChild.nextSibling == null)
-       }
+           if (heading) {
+             selection.append('h4').attr('class', 'measurement-heading').html(heading);
+           }
 
-       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;
+           var list = selection.append('ul');
+           var coordItem;
 
-             while (child) {
-               var next = child.nextSibling;
-               this.insertBefore(child, refChild);
-               child = next;
-             }
+           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));
+           }
 
-             return newChild;
+           if (totalNodeCount) {
+             list.append('li').html(_t.html('info_panels.measurement.node_count') + ':').append('span').html(totalNodeCount.toLocaleString(localeCode));
            }
 
-           if (this.documentElement == null && newChild.nodeType == ELEMENT_NODE) {
-             this.documentElement = newChild;
+           if (area) {
+             list.append('li').html(_t.html('info_panels.measurement.area') + ':').append('span').html(displayArea(area, _isImperial));
            }
 
-           return _insertBefore(this, newChild, refChild), newChild.ownerDocument = this, newChild;
-         },
-         removeChild: function removeChild(oldChild) {
-           if (this.documentElement == oldChild) {
-             this.documentElement = null;
+           if (length) {
+             list.append('li').html(_t.html('info_panels.measurement.' + (closed ? 'perimeter' : 'length')) + ':').append('span').html(displayLength(length, _isImperial));
            }
 
-           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;
+           if (typeof distance === 'number') {
+             list.append('li').html(_t.html('info_panels.measurement.distance') + ':').append('span').html(displayLength(distance, _isImperial));
+           }
 
-           _visitNode(this.documentElement, function (node) {
-             if (node.nodeType == ELEMENT_NODE) {
-               if (node.getAttribute('id') == id) {
-                 rtv = node;
-                 return true;
-               }
-             }
-           });
+           if (location) {
+             coordItem = list.append('li').html(_t.html('info_panels.measurement.location') + ':');
+             coordItem.append('span').html(dmsCoordinatePair(location));
+             coordItem.append('span').html(decimalCoordinatePair(location));
+           }
 
-           return 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;
+           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));
            }
 
-           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;
+           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 node;
+           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);
+             });
+           }
          }
-       };
 
-       _extends(Document, Node);
+         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);
+           });
+         };
+
+         panel.off = function () {
+           context.map().on('drawn.info-measurement', null);
+           context.on('enter.info-measurement', null);
+         };
 
-       function Element() {
-         this._nsMap = {};
+         panel.id = 'measurement';
+         panel.label = _t.html('info_panels.measurement.title');
+         panel.key = _t('info_panels.measurement.key');
+         return panel;
        }
-       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);
+
+       var uiInfoPanels = {
+         background: uiPanelBackground,
+         history: uiPanelHistory,
+         location: uiPanelLocation,
+         measurement: uiPanelMeasurement
+       };
+
+       function uiInfo(context) {
+         var ids = Object.keys(uiInfoPanels);
+         var wasActive = ['measurement'];
+         var panels = {};
+         var active = {}; // create panels
+
+         ids.forEach(function (k) {
+           if (!panels[k]) {
+             panels[k] = uiInfoPanels[k](context);
+             active[k] = false;
            }
-         },
-         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 = [];
+         });
 
-             _visitNode(base, function (node) {
-               if (node !== base && node.nodeType == ELEMENT_NODE && (tagName === '*' || node.tagName == tagName)) {
-                 ls.push(node);
-               }
+         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
 
-             return ls;
-           });
-         },
-         getElementsByTagNameNS: function getElementsByTagNameNS(namespaceURI, localName) {
-           return new LiveNodeList(this, function (base) {
-             var ls = [];
+             infoPanels.selectAll('.panel-content').each(function (d) {
+               select(this).call(panels[d]);
+             });
+           }
 
-             _visitNode(base, function (node) {
-               if (node !== base && node.nodeType === ELEMENT_NODE && (namespaceURI === '*' || node.namespaceURI === namespaceURI) && (localName === '*' || node.localName == localName)) {
-                 ls.push(node);
-               }
+           info.toggle = function (which) {
+             var activeids = ids.filter(function (k) {
+               return active[k];
              });
 
-             return ls;
-           });
-         }
-       };
-       Document.prototype.getElementsByTagName = Element.prototype.getElementsByTagName;
-       Document.prototype.getElementsByTagNameNS = Element.prototype.getElementsByTagNameNS;
+             if (which) {
+               // toggle one
+               active[which] = !active[which];
 
-       _extends(Element, Node);
+               if (activeids.length === 1 && activeids[0] === which) {
+                 // none active anymore
+                 wasActive = [which];
+               }
 
-       function Attr() {}
-       Attr.prototype.nodeType = ATTRIBUTE_NODE;
+               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;
+                 });
+               }
+             }
 
-       _extends(Attr, Node);
+             redraw();
+           };
 
-       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;
+           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);
+             });
+           });
          }
-       };
 
-       _extends(CharacterData, Node);
+         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;
 
-       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 (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;
+         }
 
-           if (this.parentNode) {
-             this.parentNode.insertBefore(newNode, this.nextSibling);
-           }
+         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`
 
-           return newNode;
+       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')
+           };
          }
-       };
 
-       _extends(Text, CharacterData);
+         var reps;
 
-       function Comment() {}
-       Comment.prototype = {
-         nodeName: "#comment",
-         nodeType: COMMENT_NODE
-       };
+         if (replacements) {
+           reps = Object.assign(replacements, helpStringReplacements);
+         } else {
+           reps = helpStringReplacements;
+         }
 
-       _extends(Comment, CharacterData);
+         return _t.html(id, reps) // use keyboard key styling for shortcuts
+         .replace(/\`(.*?)\`/g, '<kbd>$1</kbd>');
+       }
 
-       function CDATASection() {}
-       CDATASection.prototype = {
-         nodeName: "#cdata-section",
-         nodeType: CDATA_SECTION_NODE
-       };
+       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
 
-       _extends(CDATASection, CharacterData);
 
-       function DocumentType() {}
-       DocumentType.prototype.nodeType = DOCUMENT_TYPE_NODE;
+       var missingStrings = {};
 
-       _extends(DocumentType, Node);
+       function checkKey(key, text) {
+         if (_t(key, {
+           "default": undefined
+         }) === undefined) {
+           if (missingStrings.hasOwnProperty(key)) return; // warn once
 
-       function Notation() {}
-       Notation.prototype.nodeType = NOTATION_NODE;
+           missingStrings[key] = text;
+           var missing = key + ': ' + text;
+           if (typeof console !== 'undefined') console.log(missing); // eslint-disable-line
+         }
+       }
 
-       _extends(Notation, Node);
+       function localize(obj) {
+         var key; // Assign name if entity has one..
 
-       function Entity() {}
-       Entity.prototype.nodeType = ENTITY_NODE;
+         var name = obj.tags && obj.tags.name;
 
-       _extends(Entity, Node);
+         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 EntityReference() {}
-       EntityReference.prototype.nodeType = ENTITY_REFERENCE_NODE;
 
-       _extends(EntityReference, Node);
+         var street = obj.tags && obj.tags['addr:street'];
 
-       function DocumentFragment() {}
-       DocumentFragment.prototype.nodeName = "#document-fragment";
-       DocumentFragment.prototype.nodeType = DOCUMENT_FRAGMENT_NODE;
+         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..
 
-       _extends(DocumentFragment, Node);
+           var addrTags = ['block_number', 'city', 'county', 'district', 'hamlet', 'neighbourhood', 'postcode', 'province', 'quarter', 'state', 'subdistrict', 'suburb'];
+           addrTags.forEach(function (k) {
+             var key = 'intro.graph.' + k;
+             var tag = 'addr:' + k;
+             var val = obj.tags && obj.tags[tag];
+             var str = _t(key, {
+               "default": val
+             });
 
-       function ProcessingInstruction() {}
+             if (str) {
+               if (str.match(/^<.*>$/) !== null) {
+                 delete obj.tags[tag];
+               } else {
+                 obj.tags[tag] = str;
+               }
+             }
+           });
+         }
 
-       ProcessingInstruction.prototype.nodeType = PROCESSING_INSTRUCTION_NODE;
+         return obj;
+       } // Used to detect squareness.. some duplicataion of code from actionOrthogonalize.
 
-       _extends(ProcessingInstruction, Node);
+       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
 
-       function XMLSerializer$1() {}
+         var lowerBound = Math.cos((90 - threshold) * Math.PI / 180); // near right
 
-       XMLSerializer$1.prototype.serializeToString = function (node, isHtml, nodeFilter) {
-         return nodeSerializeToString.call(node, isHtml, nodeFilter);
-       };
+         var upperBound = Math.cos(threshold * Math.PI / 180); // near straight
 
-       Node.prototype.toString = nodeSerializeToString;
+         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 nodeSerializeToString(isHtml, nodeFilter) {
-         var buf = [];
-         var refNode = this.nodeType == 9 ? this.documentElement : this;
-         var prefix = refNode.prefix;
-         var uri = refNode.namespaceURI;
+           if (mag > lowerBound && mag < upperBound) {
+             return false;
+           }
+         }
 
-         if (uri && prefix == null) {
-           //console.log(prefix)
-           var prefix = refNode.lookupPrefix(uri);
+         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 (prefix == null) {
-             //isHTML = true;
-             var visibleNamespaces = [{
-               namespace: uri,
-               prefix: null
-             } //{namespace:uri,prefix:''}
-             ];
-           }
+         if (distance === 0) {
+           return 0;
+         } else if (distance < 80) {
+           return 500;
+         } else {
+           return 1000;
          }
+       }
 
-         serializeToString(this, buf, isHtml, nodeFilter, visibleNamespaces); //console.log('###',this.nodeType,uri,prefix,buf.join(''))
+       // 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 buf.join('');
+       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 needNamespaceDefine(node, isHTML, visibleNamespaces) {
-         var prefix = node.prefix || '';
-         var uri = node.namespaceURI;
+       function uiCurtain(containerNode) {
+         var surface = select(null),
+             tooltip = select(null),
+             darkness = select(null);
 
-         if (!prefix && !uri) {
-           return false;
-         }
+         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();
 
-         if (prefix === "xml" && uri === "http://www.w3.org/XML/1998/namespace" || uri == 'http://www.w3.org/2000/xmlns/') {
-           return false;
+           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 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)
+         curtain.reveal = function (box, html, options) {
+           options = options || {};
 
-           if (ns.prefix == prefix) {
-             return ns.namespace != uri;
+           if (typeof box === 'string') {
+             box = select(box).node();
            }
-         } //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)
 
+           if (box && box.getBoundingClientRect) {
+             box = copyBox(box.getBoundingClientRect());
+             var containerRect = containerNode.getBoundingClientRect();
+             box.top -= containerRect.top;
+             box.left -= containerRect.left;
+           }
 
-         return true;
-       }
+           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;
+           }
 
-       function serializeToString(node, buf, isHTML, nodeFilter, visibleNamespaces) {
-         if (nodeFilter) {
-           node = nodeFilter(node);
+           var tooltipBox;
 
-           if (node) {
-             if (typeof node == 'string') {
-               buf.push(node);
-               return;
+           if (options.tooltipBox) {
+             tooltipBox = options.tooltipBox;
+
+             if (typeof tooltipBox === 'string') {
+               tooltipBox = select(tooltipBox).node();
              }
-           } else {
-             return;
-           } //buf.sort.apply(attrs, attributeSorter);
 
-         }
+             if (tooltipBox && tooltipBox.getBoundingClientRect) {
+               tooltipBox = copyBox(tooltipBox.getBoundingClientRect());
+             }
+           } else {
+             tooltipBox = box;
+           }
 
-         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);
+           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..
 
-             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
-                 });
-               }
+               html = html.replace(/\*\*(.*?)\*\*/g, '<span class="instruction">$1</span>');
              }
 
-             for (var i = 0; i < len; i++) {
-               var attr = attrs.item(i);
+             html = html.replace(/\*(.*?)\*/g, '<em>$1</em>'); // emphasis
 
-               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
-                 });
-               }
+             html = html.replace(/\{br\}/g, '<br/><br/>'); // linebreak
 
-               serializeToString(attr, buf, isHTML, nodeFilter, visibleNamespaces);
-             } // add namespace for current node               
+             if (options.buttonText && options.buttonCallback) {
+               html += '<div class="button-section">' + '<button href="#" class="button action">' + options.buttonText + '</button></div>';
+             }
 
+             var classes = 'curtain-tooltip popover tooltip arrowed in ' + (options.tooltipClass || '');
+             tooltip.classed(classes, true).selectAll('.popover-inner').html(html);
 
-             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 (options.buttonText && options.buttonCallback) {
+               var button = tooltip.selectAll('.button-section .button.action');
+               button.on('click', function (d3_event) {
+                 d3_event.preventDefault();
+                 options.buttonCallback();
                });
              }
 
-             if (child || isHTML && !/^(?:meta|link|img|br|hr|input)$/i.test(nodeName)) {
-               buf.push('>'); //if is cdata child node
-
-               if (isHTML && /^script$/i.test(nodeName)) {
-                 while (child) {
-                   if (child.data) {
-                     buf.push(child.data);
-                   } else {
-                     serializeToString(child, buf, isHTML, nodeFilter, visibleNamespaces);
-                   }
-
-                   child = child.nextSibling;
-                 }
-               } else {
-                 while (child) {
-                   serializeToString(child, buf, isHTML, nodeFilter, visibleNamespaces);
-                   child = child.nextSibling;
-                 }
-               }
-
-               buf.push('</', nodeName, '>');
-             } else {
-               buf.push('/>');
-             } // remove added visible namespaces
-             //visibleNamespaces.length = startVisibleNamespaces;
-
+             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;
+             if (options.tooltipClass === 'intro-mouse') {
+               tip.height += 80;
+             } // trim box dimensions to just the portion that fits in the container..
 
-           case DOCUMENT_NODE:
-           case DOCUMENT_FRAGMENT_NODE:
-             var child = node.firstChild;
 
-             while (child) {
-               serializeToString(child, buf, isHTML, nodeFilter, visibleNamespaces);
-               child = child.nextSibling;
+             if (tooltipBox.top + tooltipBox.height > h) {
+               tooltipBox.height -= tooltipBox.top + tooltipBox.height - h;
              }
 
-             return;
+             if (tooltipBox.left + tooltipBox.width > w) {
+               tooltipBox.width -= tooltipBox.left + tooltipBox.width - w;
+             } // determine tooltip placement..
 
-           case ATTRIBUTE_NODE:
-             return buf.push(' ', node.name, '="', node.value.replace(/[<&"]/g, _xmlEncoder), '"');
 
-           case TEXT_NODE:
-             return buf.push(node.data.replace(/[<&]/g, _xmlEncoder));
+             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;
 
-           case CDATA_SECTION_NODE:
-             return buf.push('<![CDATA[', node.data, ']]>');
+               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];
+                 }
+               }
+             }
 
-           case COMMENT_NODE:
-             return buf.push("<!--", node.data, "-->");
+             if (options.duration !== 0 || !tooltip.classed(side)) {
+               tooltip.call(uiToggle(true));
+             }
 
-           case DOCUMENT_TYPE_NODE:
-             var pubid = node.publicId;
-             var sysid = node.systemId;
-             buf.push('<!DOCTYPE ', node.name);
+             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 (pubid) {
-               buf.push(' PUBLIC "', pubid);
+             var shiftY = 0;
 
-               if (sysid && sysid != '.') {
-                 buf.push('" "', sysid);
+             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;
                }
+             }
 
-               buf.push('">');
-             } else if (sysid && sysid != '.') {
-               buf.push(' SYSTEM "', sysid, '">');
-             } else {
-               var sub = node.internalSubset;
+             tooltip.selectAll('.popover-inner').style('top', shiftY + 'px');
+           } else {
+             tooltip.classed('in', false).call(uiToggle(false));
+           }
 
-               if (sub) {
-                 buf.push(" [", sub, "]");
-               }
+           curtain.cut(box, options.duration);
+           return tooltip;
+         };
 
-               buf.push(">");
-             }
+         curtain.cut = function (datum, duration) {
+           darkness.datum(datum).interrupt();
+           var selection;
 
-             return;
+           if (duration === 0) {
+             selection = darkness;
+           } else {
+             selection = darkness.transition().duration(duration || 600).ease(linear$1);
+           }
+
+           selection.attr('d', function (d) {
+             var containerWidth = containerNode.clientWidth;
+             var containerHeight = containerNode.clientHeight;
+             var string = 'M 0,0 L 0,' + containerHeight + ' L ' + containerWidth + ',' + containerHeight + 'L' + containerWidth + ',0 Z';
+             if (!d) return string;
+             return string + 'M' + d.left + ',' + d.top + 'L' + d.left + ',' + (d.top + d.height) + 'L' + (d.left + d.width) + ',' + (d.top + d.height) + 'L' + (d.left + d.width) + ',' + d.top + 'Z';
+           });
+         };
 
-           case PROCESSING_INSTRUCTION_NODE:
-             return buf.push("<?", node.target, " ", node.data, "?>");
+         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.
 
-           case ENTITY_REFERENCE_NODE:
-             return buf.push('&', node.nodeName, ';');
-           //case ENTITY_NODE:
-           //case NOTATION_NODE:
 
-           default:
-             buf.push('??', node.nodeName);
+         function copyBox(src) {
+           return {
+             top: src.top,
+             right: src.right,
+             bottom: src.bottom,
+             left: src.left,
+             width: src.width,
+             height: src.height
+           };
          }
-       }
 
-       function _importNode(doc, node, deep) {
-         var node2;
+         return curtain;
+       }
 
-         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));
-           //}
+       function uiIntroWelcome(context, reveal) {
+         var dispatch = dispatch$8('done');
+         var chapter = {
+           title: 'intro.welcome.title'
+         };
 
-           case DOCUMENT_FRAGMENT_NODE:
-             break;
+         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
+           });
+         }
 
-           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;
+         function practice() {
+           reveal('.intro-nav-wrap .chapter-welcome', helpHtml('intro.welcome.practice'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: words
+           });
          }
 
-         if (!node2) {
-           node2 = node.cloneNode(false); //false
+         function words() {
+           reveal('.intro-nav-wrap .chapter-welcome', helpHtml('intro.welcome.words'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: chapters
+           });
          }
 
-         node2.ownerDocument = doc;
-         node2.parentNode = null;
+         function chapters() {
+           dispatch.call('done');
+           reveal('.intro-nav-wrap .chapter-navigation', helpHtml('intro.welcome.chapters', {
+             next: _t('intro.navigation.title')
+           }));
+         }
 
-         if (deep) {
-           var child = node.firstChild;
+         chapter.enter = function () {
+           welcome();
+         };
 
-           while (child) {
-             node2.appendChild(_importNode(doc, child, deep));
-             child = child.nextSibling;
-           }
-         }
+         chapter.exit = function () {
+           context.container().select('.curtain-tooltip.intro-mouse').selectAll('.counter').remove();
+         };
 
-         return node2;
-       } //
-       //var _relationMap = {firstChild:1,lastChild:1,previousSibling:1,nextSibling:1,
-       //                                      attributes:1,childNodes:1,parentNode:1,documentElement:1,doctype,};
+         chapter.restart = function () {
+           chapter.exit();
+           chapter.enter();
+         };
 
+         return utilRebind(chapter, dispatch, 'on');
+       }
 
-       function _cloneNode(doc, node, deep) {
-         var node2 = new node.constructor();
+       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'
+         };
 
-         for (var n in node) {
-           var v = node[n];
+         function timeout(f, t) {
+           timeouts.push(window.setTimeout(f, t));
+         }
 
-           if (_typeof(v) != 'object') {
-             if (v != node2[n]) {
-               node2[n] = v;
-             }
-           }
+         function eventCancel(d3_event) {
+           d3_event.stopPropagation();
+           d3_event.preventDefault();
          }
 
-         if (node.childNodes) {
-           node2.childNodes = new NodeList();
+         function isTownHallSelected() {
+           var ids = context.selectedIDs();
+           return ids.length === 1 && ids[0] === hallId;
          }
 
-         node2.ownerDocument = doc;
+         function dragMap() {
+           context.enter(modeBrowse(context));
+           context.history().reset('initial');
+           var msec = transitionTime(townHall, context.map().center());
 
-         switch (node2.nodeType) {
-           case ELEMENT_NODE:
-             var attrs = node.attributes;
-             var attrs2 = node2.attributes = new NamedNodeMap();
-             var len = attrs.length;
-             attrs2._ownerElement = node2;
+           if (msec) {
+             reveal(null, null, {
+               duration: 0
+             });
+           }
 
-             for (var i = 0; i < len; i++) {
-               node2.setAttributeNode(_cloneNode(doc, attrs.item(i), true));
-             }
+           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();
 
-             break;
+               if (centerStart[0] !== centerNow[0] || centerStart[1] !== centerNow[1]) {
+                 context.map().on('move.intro', null);
+                 timeout(function () {
+                   continueTo(zoomMap);
+                 }, 3000);
+               }
+             });
+           }, msec + 100);
 
-           case ATTRIBUTE_NODE:
-             deep = true;
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             nextStep();
+           }
          }
 
-         if (deep) {
-           var child = node.firstChild;
+         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);
+             }
+           });
 
-           while (child) {
-             node2.appendChild(_cloneNode(doc, child, deep));
-             child = child.nextSibling;
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             nextStep();
            }
          }
 
-         return node2;
-       }
+         function features() {
+           var onClick = function onClick() {
+             continueTo(pointsLinesAreas);
+           };
 
-       function __set__(object, key, value) {
-         object[key] = value;
-       } //do dynamic
+           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
+             });
+           });
 
+           function continueTo(nextStep) {
+             context.map().on('drawn.intro', null);
+             nextStep();
+           }
+         }
 
-       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));
-                   }
+         function pointsLinesAreas() {
+           var onClick = function onClick() {
+             continueTo(nodesWays);
+           };
 
-                   node = node.nextSibling;
-                 }
+           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
+             });
+           });
 
-                 return buf.join('');
+           function continueTo(nextStep) {
+             context.map().on('drawn.intro', null);
+             nextStep();
+           }
+         }
 
-               default:
-                 return node.nodeValue;
-             }
+         function nodesWays() {
+           var onClick = function onClick() {
+             continueTo(clickTownHall);
            };
 
-           Object.defineProperty(LiveNodeList.prototype, 'length', {
-             get: function get() {
-               _updateLiveList(this);
+           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
+             });
+           });
+
+           function continueTo(nextStep) {
+             context.map().on('drawn.intro', null);
+             nextStep();
+           }
+         }
+
+         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
 
-               return this.$$length;
+           context.history().on('change.intro', function () {
+             if (!context.hasEntity(hallId)) {
+               continueTo(clickTownHall);
              }
            });
-           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));
-                   }
+           function continueTo(nextStep) {
+             context.on('enter.intro', null);
+             context.map().on('move.intro drawn.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
+           }
+         }
 
-                   break;
+         function selectedTownHall() {
+           if (!isTownHallSelected()) return clickTownHall();
+           var entity = context.hasEntity(hallId);
+           if (!entity) return clickTownHall();
+           var box = pointBox(entity.loc, context);
 
-                 default:
-                   //TODO:
-                   this.data = data;
-                   this.value = data;
-                   this.nodeValue = data;
-               }
+           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);
              }
            });
 
-           __set__ = function __set__(object, key, value) {
-             //console.log(value)
-             object['$$' + key] = value;
-           };
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
+           }
          }
-       } catch (e) {//ie8
-       } //if(typeof require == 'function'){
-
 
-       var DOMImplementation_1 = DOMImplementation;
-       var XMLSerializer_1 = XMLSerializer$1; //}
-
-       var dom = {
-         DOMImplementation: DOMImplementation_1,
-         XMLSerializer: XMLSerializer_1
-       };
+         function editorTownHall() {
+           if (!isTownHallSelected()) return clickTownHall(); // disallow scrolling
 
-       var domParser = createCommonjsModule(function (module, exports) {
-         function DOMParser(options) {
-           this.options = options || {
-             locator: {}
-           };
-         }
+           context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
 
-         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': "'"
+           var onClick = function onClick() {
+             continueTo(presetTownHall);
            };
 
-           if (locator) {
-             domBuilder.setDocumentLocator(locator);
-           }
-
-           sax.errorHandler = buildErrorHandler(errorHandler, domBuilder, locator);
-           sax.domBuilder = options.domBuilder || domBuilder;
-
-           if (/\/x?html?$/.test(mimeType)) {
-             entityMap.nbsp = '\xa0';
-             entityMap.copy = '\xa9';
-             defaultNSMap[''] = 'http://www.w3.org/1999/xhtml';
-           }
-
-           defaultNSMap.xml = defaultNSMap.xml || 'http://www.w3.org/XML/1998/namespace';
+           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);
+             }
+           });
 
-           if (source) {
-             sax.parse(source, defaultNSMap, entityMap);
-           } else {
-             sax.errorHandler.error("invalid doc source");
+           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 domBuilder.doc;
-         };
+         function presetTownHall() {
+           if (!isTownHallSelected()) return clickTownHall(); // reset pane, in case user happened to change it..
 
-         function buildErrorHandler(errorImpl, domBuilder, locator) {
-           if (!errorImpl) {
-             if (domBuilder instanceof DOMHandler) {
-               return domBuilder;
-             }
+           context.container().select('.inspector-wrap .panewrap').style('right', '0%'); // disallow scrolling
 
-             errorImpl = domBuilder;
-           }
+           context.container().select('.inspector-wrap').on('wheel.intro', eventCancel); // preset match, in case the user happened to change it.
 
-           var errorHandler = {};
-           var isCallback = errorImpl instanceof Function;
-           locator = locator || {};
+           var entity = context.entity(context.selectedIDs()[0]);
+           var preset = _mainPresetIndex.match(entity, context.graph());
 
-           function build(key) {
-             var fn = errorImpl[key];
+           var onClick = function onClick() {
+             continueTo(fieldsTownHall);
+           };
 
-             if (!fn && isCallback) {
-               fn = errorImpl.length == 2 ? function (msg) {
-                 errorImpl(key, msg);
-               } : errorImpl;
+           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);
              }
+           });
 
-             errorHandler[key] = fn && function (msg) {
-               fn('[xmldom ' + key + ']\t' + msg + _locator(locator));
-             } || function () {};
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             context.history().on('change.intro', null);
+             context.container().select('.inspector-wrap').on('wheel.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;
          }
-         /**
-          * @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);
 
-             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)
+         function fieldsTownHall() {
+           if (!isTownHallSelected()) return clickTownHall(); // reset pane, in case user happened to change it..
 
-             if (chars) {
-               if (this.cdata) {
-                 var charNode = this.doc.createCDATASection(chars);
-               } else {
-                 var charNode = this.doc.createTextNode(chars);
-               }
+           context.container().select('.inspector-wrap .panewrap').style('right', '0%'); // disallow scrolling
 
-               if (this.currentElement) {
-                 this.currentElement.appendChild(charNode);
-               } else if (/^\s*$/.test(chars)) {
-                 this.doc.appendChild(charNode); //process xml
-               }
+           context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
 
-               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;
+           var onClick = function onClick() {
+             continueTo(closeTownHall);
+           };
 
-             if (impl && impl.createDocumentType) {
-               var dt = impl.createDocumentType(name, publicId, systemId);
-               this.locator && position(this.locator, dt);
-               appendElement(this, dt);
+           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);
              }
-           },
-
-           /**
-            * @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;
-           }
-         };
+           });
 
-         function _locator(l) {
-           if (l) {
-             return '\n@' + (l.systemId || '') + '#[line:' + l.lineNumber + ',col:' + l.columnNumber + ']';
+           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 _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) + '';
-             }
+         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 chars;
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
            }
          }
-         /*
-          * @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 searchStreet() {
+           context.enter(modeBrowse(context));
+           context.history().reset('initial'); // ensure spring street exists
 
-         "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 */
+           var msec = transitionTime(springStreet, 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(springStreet, 19, msec); // ..and user can see it
 
-             for (var i = 0, h = 0; i < x.length; i++) {
-               h = (h << 5) - h + x.charCodeAt(i) | 0;
-             }
+           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);
+         }
 
-             return h;
-           } // all Y children of X
+         function checkSearchResult() {
+           var first = context.container().select('.feature-list-item:nth-child(0n+2)'); // skip "No Results" item
 
+           var firstName = first.select('.entity-name');
+           var name = _t('intro.graph.name.spring-street');
 
-           function get(x, y) {
-             return x.getElementsByTagName(y);
+           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);
            }
 
-           function attr(x, y) {
-             return x.getAttribute(y);
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             context.container().select('.search-header input').on('keydown.intro', null).on('keyup.intro', null);
+             nextStep();
            }
+         }
 
-           function attrf(x, y) {
-             return parseFloat(attr(x, y));
-           } // one Y child of X, if any, otherwise null
-
+         function selectedStreet() {
+           if (!context.hasEntity(springStreetEndId) || !context.hasEntity(springStreetId)) {
+             return searchStreet();
+           }
 
-           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
+           var onClick = function onClick() {
+             continueTo(editorStreet);
+           };
 
+           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.
 
-           function norm(el) {
-             if (el.normalize) {
-               el.normalize();
+           context.on('enter.intro', function (mode) {
+             if (!context.hasEntity(springStreetId)) {
+               return continueTo(searchStreet);
              }
 
-             return el;
-           } // cast array x into numbers
-
+             var ids = context.selectedIDs();
 
-           function numarray(x) {
-             for (var j = 0, o = []; j < x.length; j++) {
-               o[j] = parseFloat(x[j]);
+             if (mode.id !== 'select' || !ids.length || ids[0] !== springStreetId) {
+               // keep Spring Street selected..
+               context.enter(modeSelect(context, [springStreetId]));
              }
-
-             return o;
-           } // get the content of a text node, if any
-
-
-           function nodeVal(x) {
-             if (x) {
-               norm(x);
+           });
+           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)
              }
+           });
 
-             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);
+             context.history().on('change.intro', null);
+             nextStep();
+           }
+         }
 
+         function editorStreet() {
+           var selector = '.entity-editor-pane button.close svg use';
+           var href = select(selector).attr('href') || '#iD-icon-close';
+           reveal('.entity-editor-pane', helpHtml('intro.navigation.street_different_fields') + '{br}' + helpHtml('intro.navigation.editor_street', {
+             button: icon(href, 'inline'),
+             field1: onewayField.label(),
+             field2: maxspeedField.label()
+           }));
+           context.on('exit.intro', function () {
+             continueTo(play);
+           });
+           context.history().on('change.intro', function () {
+             // update the close icon in the tooltip if the user edits something.
+             var selector = '.entity-editor-pane button.close svg use';
+             var href = select(selector).attr('href') || '#iD-icon-close';
+             reveal('.entity-editor-pane', helpHtml('intro.navigation.street_different_fields') + '{br}' + helpHtml('intro.navigation.editor_street', {
+               button: icon(href, 'inline'),
+               field1: onewayField.label(),
+               field2: maxspeedField.label()
+             }), {
+               duration: 0
+             });
+           });
 
-           function getMulti(x, ys) {
-             var o = {},
-                 n,
-                 k;
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
+           }
+         }
 
-             for (k = 0; k < ys.length; k++) {
-               n = get1(x, ys[k]);
-               if (n) o[ys[k]] = nodeVal(n);
+         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');
              }
+           });
+         }
 
-             return o;
-           } // add properties of Y to X, overwriting if present in both
+         chapter.enter = function () {
+           dragMap();
+         };
 
+         chapter.exit = function () {
+           timeouts.forEach(window.clearTimeout);
+           context.on('enter.intro exit.intro', null);
+           context.map().on('move.intro drawn.intro', null);
+           context.history().on('change.intro', null);
+           context.container().select('.inspector-wrap').on('wheel.intro', null);
+           context.container().select('.search-header input').on('keydown.intro keyup.intro', null);
+         };
 
-           function extend(x, y) {
-             for (var k in y) {
-               x[k] = y[k];
-             }
-           } // get one coordinate from a coordinate array, if any
+         chapter.restart = function () {
+           chapter.exit();
+           chapter.enter();
+         };
 
+         return utilRebind(chapter, dispatch, 'on');
+       }
 
-           function coord1(v) {
-             return numarray(v.replace(removeSpace, '').split(','));
-           } // get all coordinates from a coordinate array as [[],[]]
+       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'
+         };
 
+         function timeout(f, t) {
+           timeouts.push(window.setTimeout(f, t));
+         }
 
-           function coord(v) {
-             var coords = v.replace(trimSpace, '').split(splitSpace),
-                 o = [];
+         function eventCancel(d3_event) {
+           d3_event.stopPropagation();
+           d3_event.preventDefault();
+         }
 
-             for (var i = 0; i < coords.length; i++) {
-               o.push(coord1(coords[i]));
-             }
+         function addPoint() {
+           context.enter(modeBrowse(context));
+           context.history().reset('initial');
+           var msec = transitionTime(intersection, context.map().center());
 
-             return o;
+           if (msec) {
+             reveal(null, null, {
+               duration: 0
+             });
            }
 
-           function coordPair(x) {
-             var ll = [attrf(x, 'lon'), attrf(x, 'lat')],
-                 ele = get1(x, 'ele'),
-                 // handle namespaced attribute in browser
-             heartRate = get1(x, 'gpxtpx:hr') || get1(x, 'hr'),
-                 time = get1(x, 'time'),
-                 e;
-
-             if (ele) {
-               e = parseFloat(nodeVal(ele));
-
-               if (!isNaN(e)) {
-                 ll.push(e);
-               }
-             }
-
-             return {
-               coordinates: ll,
-               time: time ? nodeVal(time) : null,
-               heartRate: heartRate ? parseFloat(nodeVal(heartRate)) : null
-             };
-           } // create a new feature collection parent object
-
+           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 fc() {
-             return {
-               type: 'FeatureCollection',
-               features: []
-             };
+           function continueTo(nextStep) {
+             context.on('enter.intro', null);
+             nextStep();
            }
+         }
 
-           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 placePoint() {
+           if (context.mode().id !== 'add-point') {
+             return chapter.restart();
            }
 
-           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
+           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);
+           });
 
-             /* istanbul ignore next */
-             if (str.xml !== undefined) return str.xml;
-             return serializer.serializeToString(str);
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             nextStep();
            }
+         }
 
-           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);
-                 }
-
-                 if (v.length === 6 || v.length === 3) {
-                   color = v;
-                 }
-
-                 if (v.length === 8) {
-                   opacity = parseInt(v.substr(0, 2), 16) / 255;
-                   color = '#' + v.substr(6, 2) + v.substr(4, 2) + v.substr(2, 2);
-                 }
-
-                 return [color, isNaN(opacity) ? undefined : opacity];
-               }
-
-               function gxCoord(v) {
-                 return numarray(v.split(' '));
-               }
-
-               function gxCoords(root) {
-                 var elems = get(root, 'coord'),
-                     coords = [],
-                     times = [];
-                 if (elems.length === 0) elems = get(root, 'gx:coord');
-
-                 for (var i = 0; i < elems.length; i++) {
-                   coords.push(gxCoord(nodeVal(elems[i])));
-                 }
-
-                 var timeElems = get(root, 'when');
-
-                 for (var j = 0; j < timeElems.length; j++) {
-                   times.push(nodeVal(timeElems[j]));
-                 }
-
-                 return {
-                   coords: coords,
-                   times: times
-                 };
-               }
-
-               function getGeometry(root) {
-                 var geomNode,
-                     geomNodes,
-                     i,
-                     j,
-                     k,
-                     geoms = [],
-                     coordTimes = [];
-
-                 if (get1(root, 'MultiGeometry')) {
-                   return getGeometry(get1(root, 'MultiGeometry'));
-                 }
-
-                 if (get1(root, 'MultiTrack')) {
-                   return getGeometry(get1(root, 'MultiTrack'));
-                 }
-
-                 if (get1(root, 'gx:MultiTrack')) {
-                   return getGeometry(get1(root, 'gx:MultiTrack'));
-                 }
-
-                 for (i = 0; i < geotypes.length; i++) {
-                   geomNodes = get(root, geotypes[i]);
-
-                   if (geomNodes) {
-                     for (j = 0; j < geomNodes.length; j++) {
-                       geomNode = geomNodes[j];
-
-                       if (geotypes[i] === 'Point') {
-                         geoms.push({
-                           type: 'Point',
-                           coordinates: coord1(nodeVal(get1(geomNode, 'coordinates')))
-                         });
-                       } else if (geotypes[i] === 'LineString') {
-                         geoms.push({
-                           type: 'LineString',
-                           coordinates: coord(nodeVal(get1(geomNode, 'coordinates')))
-                         });
-                       } else if (geotypes[i] === 'Polygon') {
-                         var rings = get(geomNode, 'LinearRing'),
-                             coords = [];
-
-                         for (k = 0; k < rings.length; k++) {
-                           coords.push(coord(nodeVal(get1(rings[k], 'coordinates'))));
-                         }
-
-                         geoms.push({
-                           type: 'Polygon',
-                           coordinates: coords
-                         });
-                       } else if (geotypes[i] === 'Track' || geotypes[i] === 'gx:Track') {
-                         var track = gxCoords(geomNode);
-                         geoms.push({
-                           type: 'LineString',
-                           coordinates: track.coords
-                         });
-                         if (track.times.length) coordTimes.push(track.times);
-                       }
-                     }
-                   }
-                 }
-
-                 return {
-                   geoms: geoms,
-                   coordTimes: coordTimes
-                 };
-               }
-
-               function getPlacemark(root) {
-                 var geomsAndTimes = getGeometry(root),
-                     i,
-                     properties = {},
-                     name = nodeVal(get1(root, 'name')),
-                     address = nodeVal(get1(root, 'address')),
-                     styleUrl = nodeVal(get1(root, 'styleUrl')),
-                     description = nodeVal(get1(root, 'description')),
-                     timeSpan = get1(root, 'TimeSpan'),
-                     timeStamp = get1(root, 'TimeStamp'),
-                     extendedData = get1(root, 'ExtendedData'),
-                     lineStyle = get1(root, 'LineStyle'),
-                     polyStyle = get1(root, 'PolyStyle'),
-                     visibility = get1(root, 'visibility');
-                 if (!geomsAndTimes.geoms.length) return [];
-                 if (name) properties.name = name;
-                 if (address) properties.address = address;
-
-                 if (styleUrl) {
-                   if (styleUrl[0] !== '#') {
-                     styleUrl = '#' + styleUrl;
-                   }
-
-                   properties.styleUrl = styleUrl;
-
-                   if (styleIndex[styleUrl]) {
-                     properties.styleHash = styleIndex[styleUrl];
-                   }
-
-                   if (styleMapIndex[styleUrl]) {
-                     properties.styleMapHash = styleMapIndex[styleUrl];
-                     properties.styleHash = styleIndex[styleMapIndex[styleUrl].normal];
-                   } // Try to populate the lineStyle or polyStyle since we got the style hash
-
-
-                   var style = styleByHash[properties.styleHash];
-
-                   if (style) {
-                     if (!lineStyle) lineStyle = get1(style, 'LineStyle');
-                     if (!polyStyle) polyStyle = get1(style, 'PolyStyle');
-                   }
-                 }
-
-                 if (description) properties.description = description;
-
-                 if (timeSpan) {
-                   var begin = nodeVal(get1(timeSpan, 'begin'));
-                   var end = nodeVal(get1(timeSpan, 'end'));
-                   properties.timespan = {
-                     begin: begin,
-                     end: end
-                   };
-                 }
-
-                 if (timeStamp) {
-                   properties.timestamp = nodeVal(get1(timeStamp, 'when'));
-                 }
-
-                 if (lineStyle) {
-                   var linestyles = kmlColor(nodeVal(get1(lineStyle, 'color'))),
-                       color = linestyles[0],
-                       opacity = linestyles[1],
-                       width = parseFloat(nodeVal(get1(lineStyle, 'width')));
-                   if (color) properties.stroke = color;
-                   if (!isNaN(opacity)) properties['stroke-opacity'] = opacity;
-                   if (!isNaN(width)) properties['stroke-width'] = width;
-                 }
-
-                 if (polyStyle) {
-                   var polystyles = kmlColor(nodeVal(get1(polyStyle, 'color'))),
-                       pcolor = polystyles[0],
-                       popacity = polystyles[1],
-                       fill = nodeVal(get1(polyStyle, 'fill')),
-                       outline = nodeVal(get1(polyStyle, 'outline'));
-                   if (pcolor) properties.fill = pcolor;
-                   if (!isNaN(popacity)) properties['fill-opacity'] = popacity;
-                   if (fill) properties['fill-opacity'] = fill === '1' ? properties['fill-opacity'] || 1 : 0;
-                   if (outline) properties['stroke-opacity'] = outline === '1' ? properties['stroke-opacity'] || 1 : 0;
-                 }
-
-                 if (extendedData) {
-                   var datas = get(extendedData, 'Data'),
-                       simpleDatas = get(extendedData, 'SimpleData');
-
-                   for (i = 0; i < datas.length; i++) {
-                     properties[datas[i].getAttribute('name')] = nodeVal(get1(datas[i], 'value'));
-                   }
-
-                   for (i = 0; i < simpleDatas.length; i++) {
-                     properties[simpleDatas[i].getAttribute('name')] = nodeVal(simpleDatas[i]);
-                   }
-                 }
-
-                 if (visibility) {
-                   properties.visibility = nodeVal(visibility);
-                 }
-
-                 if (geomsAndTimes.coordTimes.length) {
-                   properties.coordTimes = geomsAndTimes.coordTimes.length === 1 ? geomsAndTimes.coordTimes[0] : geomsAndTimes.coordTimes;
-                 }
-
-                 var feature = {
-                   type: 'Feature',
-                   geometry: geomsAndTimes.geoms.length === 1 ? geomsAndTimes.geoms[0] : {
-                     type: 'GeometryCollection',
-                     geometries: geomsAndTimes.geoms
-                   },
-                   properties: properties
-                 };
-                 if (attr(root, 'id')) feature.id = attr(root, 'id');
-                 return [feature];
-               }
-
-               return gj;
-             },
-             gpx: function 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);
-               }
-
-               for (i = 0; i < routes.length; i++) {
-                 feature = getRoute(routes[i]);
-                 if (feature) gj.features.push(feature);
-               }
+         function searchPreset() {
+           if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
+             return addPoint();
+           } // disallow scrolling
 
-               for (i = 0; i < waypoints.length; i++) {
-                 gj.features.push(getPoint(waypoints[i]));
-               }
 
-               function getPoints(node, pointname) {
-                 var pts = get(node, pointname),
-                     line = [],
-                     times = [],
-                     heartRates = [],
-                     l = pts.length;
-                 if (l < 2) return {}; // Invalid line in GeoJSON
+           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 < 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 ids = context.selectedIDs();
 
-                 return {
-                   line: line,
-                   times: times,
-                   heartRates: heartRates
-                 };
-               }
+             if (mode.id !== 'select' || !ids.length || ids[0] !== _pointID) {
+               // keep the user's point selected..
+               context.enter(modeSelect(context, [_pointID])); // disallow scrolling
 
-               function getTrack(node) {
-                 var segments = get(node, 'trkseg'),
-                     track = [],
-                     times = [],
-                     heartRates = [],
-                     line;
+               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);
+             }
+           });
 
-                 for (var i = 0; i < segments.length; i++) {
-                   line = getPoints(segments[i], 'trkpt');
+           function checkPresetSearch() {
+             var first = context.container().select('.preset-list-item:first-child');
 
-                   if (line) {
-                     if (line.line) track.push(line.line);
-                     if (line.times && line.times.length) times.push(line.times);
-                     if (line.heartRates && line.heartRates.length) heartRates.push(line.heartRates);
-                   }
-                 }
+             if (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 (track.length === 0) return;
-                 var properties = getProperties(node);
-                 extend(properties, getLineStyle(get1(node, 'extensions')));
-                 if (times.length) properties.coordTimes = track.length === 1 ? times[0] : times;
-                 if (heartRates.length) properties.heartRates = track.length === 1 ? heartRates[0] : heartRates;
-                 return {
-                   type: 'Feature',
-                   properties: properties,
-                   geometry: {
-                     type: track.length === 1 ? 'LineString' : 'MultiLineString',
-                     coordinates: track.length === 1 ? track[0] : track
-                   }
-                 };
-               }
+           function continueTo(nextStep) {
+             context.on('enter.intro', null);
+             context.history().on('change.intro', null);
+             context.container().select('.inspector-wrap').on('wheel.intro', null);
+             context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
+             nextStep();
+           }
+         }
 
-               function getRoute(node) {
-                 var line = getPoints(node, 'rtept');
-                 if (!line.line) return;
-                 var prop = getProperties(node);
-                 extend(prop, getLineStyle(get1(node, 'extensions')));
-                 var routeObj = {
-                   type: 'Feature',
-                   properties: prop,
-                   geometry: {
-                     type: 'LineString',
-                     coordinates: line.line
-                   }
-                 };
-                 return routeObj;
-               }
+         function aboutFeatureEditor() {
+           if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
+             return addPoint();
+           }
 
-               function getPoint(node) {
-                 var prop = getProperties(node);
-                 extend(prop, getMulti(node, ['sym']));
-                 return {
-                   type: 'Feature',
-                   properties: prop,
-                   geometry: {
-                     type: 'Point',
-                     coordinates: coordPair(node).coordinates
-                   }
-                 };
+           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 getLineStyle(extensions) {
-                 var style = {};
-
-                 if (extensions) {
-                   var lineStyle = get1(extensions, 'line');
-
-                   if (lineStyle) {
-                     var color = nodeVal(get1(lineStyle, 'color')),
-                         opacity = parseFloat(nodeVal(get1(lineStyle, 'opacity'))),
-                         width = parseFloat(nodeVal(get1(lineStyle, 'width')));
-                     if (color) style.stroke = color;
-                     if (!isNaN(opacity)) style['stroke-opacity'] = opacity; // GPX width is in mm, convert to px with 96 px per inch
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             nextStep();
+           }
+         }
 
-                     if (!isNaN(width)) style['stroke-width'] = width * 96 / 25.4;
-                   }
-                 }
+         function addName() {
+           if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
+             return addPoint();
+           } // reset pane, in case user happened to change it..
 
-                 return style;
-               }
 
-               function getProperties(node) {
-                 var prop = getMulti(node, ['name', 'cmt', 'desc', 'type', 'time', 'keywords']),
-                     links = get(node, 'link');
-                 if (links.length) prop.links = [];
+           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);
 
-                 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 (entity.tags.name) {
+               var tooltip = reveal('.entity-editor-pane', addNameString, {
+                 tooltipClass: 'intro-points-describe',
+                 buttonText: _t.html('intro.ok'),
+                 buttonCallback: function buttonCallback() {
+                   continueTo(addCloseEditor);
                  }
-
-                 return prop;
-               }
-
-               return gj;
+               });
+               tooltip.select('.instruction').style('display', 'none');
+             } else {
+               reveal('.entity-editor-pane', addNameString, {
+                 tooltipClass: 'intro-points-describe'
+               });
              }
-           };
-           return t;
-         }();
-
-         module.exports = toGeoJSON;
-       });
-
-       var _initialized = false;
-       var _enabled = false;
-
-       var _geojson;
+           }, 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);
+           });
 
-       function svgData(projection, context, dispatch) {
-         var throttledRedraw = throttle(function () {
-           dispatch.call('change');
-         }, 1000);
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
+           }
+         }
 
-         var _showLabels = true;
-         var detected = utilDetect();
-         var layer = select(null);
+         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')
+           }));
 
-         var _vtService;
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             nextStep();
+           }
+         }
 
-         var _fileList;
+         function reselectPoint() {
+           if (!_pointID) return chapter.restart();
+           var entity = context.hasEntity(_pointID);
+           if (!entity) return chapter.restart(); // make sure it's still a cafe, in case user somehow changed it..
 
-         var _template;
+           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());
 
-         var _src;
+           if (msec) {
+             reveal(null, null, {
+               duration: 0
+             });
+           }
 
-         function init() {
-           if (_initialized) return; // run once
+           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..
 
-           _geojson = {};
-           _enabled = true;
+             context.on('enter.intro', function (mode) {
+               if (mode.id !== 'select') return;
+               continueTo(updatePoint);
+             });
+           }, msec + 100);
 
-           function over(d3_event) {
-             d3_event.stopPropagation();
-             d3_event.preventDefault();
-             d3_event.dataTransfer.dropEffect = 'copy';
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             nextStep();
            }
-
-           context.container().attr('dropzone', 'copy').on('drop.svgData', function (d3_event) {
-             d3_event.stopPropagation();
-             d3_event.preventDefault();
-             if (!detected.filedrop) return;
-             drawData.fileList(d3_event.dataTransfer.files);
-           }).on('dragenter.svgData', over).on('dragexit.svgData', over).on('dragover.svgData', over);
-           _initialized = true;
          }
 
-         function getService() {
-           if (services.vectorTile && !_vtService) {
-             _vtService = services.vectorTile;
-
-             _vtService.event.on('loadedData', throttledRedraw);
-           } else if (!services.vectorTile && _vtService) {
-             _vtService = null;
-           }
+         function updatePoint() {
+           if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
+             return continueTo(reselectPoint);
+           } // reset pane, in case user happened to untag the point..
 
-           return _vtService;
-         }
 
-         function showLayer() {
-           layerOn();
-           layer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end', function () {
-             dispatch.call('change');
+           context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+           context.on('exit.intro', function () {
+             continueTo(reselectPoint);
            });
-         }
-
-         function hideLayer() {
-           throttledRedraw.cancel();
-           layer.transition().duration(250).style('opacity', 0).on('end', layerOff);
-         }
+           context.history().on('change.intro', function () {
+             continueTo(updateCloseEditor);
+           });
+           timeout(function () {
+             reveal('.entity-editor-pane', helpHtml('intro.points.update'), {
+               tooltipClass: 'intro-points-describe'
+             });
+           }, 400);
 
-         function layerOn() {
-           layer.style('display', 'block');
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
+           }
          }
 
-         function layerOff() {
-           layer.selectAll('.viewfield-group').remove();
-           layer.style('display', 'none');
-         } // ensure that all geojson features in a collection have IDs
+         function updateCloseEditor() {
+           if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
+             return continueTo(reselectPoint);
+           } // reset pane, in case user happened to change it..
 
 
-         function ensureIDs(gj) {
-           if (!gj) return null;
+           context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+           context.on('exit.intro', function () {
+             continueTo(rightClickPoint);
+           });
+           timeout(function () {
+             reveal('.entity-editor-pane', helpHtml('intro.points.update_close', {
+               button: icon('#iD-icon-close', 'inline')
+             }));
+           }, 500);
 
-           if (gj.type === 'FeatureCollection') {
-             for (var i = 0; i < gj.features.length; i++) {
-               ensureFeatureID(gj.features[i]);
-             }
-           } else {
-             ensureFeatureID(gj);
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             nextStep();
            }
+         }
 
-           return gj;
-         } // ensure that each single Feature object has a unique ID
-
-
-         function ensureFeatureID(feature) {
-           if (!feature) return;
-           feature.__featurehash__ = utilHashcode(fastJsonStableStringify(feature));
-           return feature;
-         } // Prefer an array of Features instead of a FeatureCollection
-
+         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
 
-         function getFeatures(gj) {
-           if (!gj) return [];
+           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 (gj.type === 'FeatureCollection') {
-             return gj.features;
-           } else {
-             return [gj];
+           function continueTo(nextStep) {
+             context.on('enter.intro', null);
+             context.map().on('move.intro', null);
+             nextStep();
            }
          }
 
-         function featureKey(d) {
-           return d.__featurehash__;
-         }
-
-         function isPolygon(d) {
-           return d.geometry.type === 'Polygon' || d.geometry.type === 'MultiPolygon';
-         }
-
-         function clipPathID(d) {
-           return 'ideditor-data-' + d.__featurehash__ + '-clippath';
-         }
+         function enterDelete() {
+           if (!_pointID) return chapter.restart();
+           var entity = context.hasEntity(_pointID);
+           if (!entity) return chapter.restart();
+           var node = selectMenuItem(context, 'delete').node();
 
-         function featureClasses(d) {
-           return ['data' + d.__featurehash__, d.geometry.type, isPolygon(d) ? 'area' : '', d.__layerID__ || ''].filter(Boolean).join(' ');
-         }
+           if (!node) {
+             return continueTo(rightClickPoint);
+           }
 
-         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
+           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
 
-           var geoData, polygonData;
+           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 (_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 continueTo(nextStep) {
+             context.map().on('move.intro', null);
+             context.history().on('change.intro', null);
+             context.on('exit.intro', null);
+             nextStep();
            }
+         }
 
-           geoData = geoData.filter(getPath);
-           polygonData = geoData.filter(isPolygon); // Draw clip paths for polygons
+         function undo() {
+           context.history().on('change.intro', function () {
+             continueTo(play);
+           });
+           reveal('.top-toolbar button.undo-button', helpHtml('intro.points.undo'));
 
-           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
+           function continueTo(nextStep) {
+             context.history().on('change.intro', null);
+             nextStep();
+           }
+         }
 
-           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
+         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');
+             }
+           });
+         }
 
-           var pathData = {
-             fill: polygonData,
-             shadow: geoData,
-             stroke: geoData
-           };
-           var paths = datagroups.selectAll('path').data(function (layer) {
-             return pathData[layer];
-           }, featureKey); // exit
+         chapter.enter = function () {
+           addPoint();
+         };
 
-           paths.exit().remove(); // enter/update
+         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);
+         };
 
-           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
+         chapter.restart = function () {
+           chapter.exit();
+           chapter.enter();
+         };
 
-           layer.call(drawLabels, 'label-halo', geoData).call(drawLabels, 'label', geoData);
+         return utilRebind(chapter, dispatch, 'on');
+       }
 
-           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
+       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 = [];
 
-             labels.exit().remove(); // enter/update
+         var _areaID;
 
-             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 chapter = {
+           title: 'intro.areas.title'
+         };
 
-         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 timeout(f, t) {
+           timeouts.push(window.setTimeout(f, t));
          }
 
-         function xmlToDom(textdata) {
-           return new DOMParser().parseFromString(textdata, 'text/xml');
+         function eventCancel(d3_event) {
+           d3_event.stopPropagation();
+           d3_event.preventDefault();
          }
 
-         drawData.setFile = function (extension, data) {
-           _template = null;
-           _fileList = null;
-           _geojson = null;
-           _src = null;
-           var gj;
-
-           switch (extension) {
-             case '.gpx':
-               gj = togeojson.gpx(xmlToDom(data));
-               break;
+         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);
+         }
 
-             case '.kml':
-               gj = togeojson.kml(xmlToDom(data));
-               break;
+         function addArea() {
+           context.enter(modeBrowse(context));
+           context.history().reset('initial');
+           _areaID = null;
+           var msec = transitionTime(playground, context.map().center());
 
-             case '.geojson':
-             case '.json':
-               gj = JSON.parse(data);
-               break;
+           if (msec) {
+             reveal(null, null, {
+               duration: 0
+             });
            }
 
-           gj = gj || {};
+           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);
 
-           if (Object.keys(gj).length) {
-             _geojson = ensureIDs(gj);
-             _src = extension + ' data file';
-             this.fitZoom();
+           function continueTo(nextStep) {
+             context.on('enter.intro', null);
+             nextStep();
            }
+         }
 
-           dispatch.call('change');
-           return this;
-         };
-
-         drawData.showLabels = function (val) {
-           if (!arguments.length) return _showLabels;
-           _showLabels = val;
-           return this;
-         };
+         function startPlayground() {
+           if (context.mode().id !== 'add-area') {
+             return chapter.restart();
+           }
 
-         drawData.enabled = function (val) {
-           if (!arguments.length) return _enabled;
-           _enabled = val;
+           _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
 
-           if (_enabled) {
-             showLayer();
-           } else {
-             hideLayer();
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             nextStep();
            }
+         }
 
-           dispatch.call('change');
-           return this;
-         };
+         function continuePlayground() {
+           if (context.mode().id !== 'draw-area') {
+             return chapter.restart();
+           }
 
-         drawData.hasData = function () {
-           var gj = _geojson || {};
-           return !!(_template || Object.keys(gj).length);
-         };
+           _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
 
-         drawData.template = function (val, src) {
-           if (!arguments.length) return _template; // test source against OSM imagery blocklists..
+           context.on('enter.intro', function (mode) {
+             if (mode.id === 'draw-area') {
+               var entity = context.hasEntity(context.selectedIDs()[0]);
 
-           var osm = context.connection();
+               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();
+             }
+           });
 
-           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);
+             context.on('enter.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 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
 
-             if (!tested) {
-               regex = /.*\.google(apis)?\..*\/(vt|kh)[\?\/].*([xyz]=.*){3}.*/;
-               fail = regex.test(val);
+           context.on('enter.intro', function (mode) {
+             if (mode.id === 'draw-area') {
+               return;
+             } else if (mode.id === 'select') {
+               _areaID = context.selectedIDs()[0];
+               return continueTo(searchPresets);
+             } else {
+               return chapter.restart();
              }
+           });
+
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             nextStep();
            }
+         }
 
-           _template = val;
-           _fileList = null;
-           _geojson = null; // strip off the querystring/hash from the template,
-           // it often includes the access token
+         function searchPresets() {
+           if (!_areaID || !context.hasEntity(_areaID)) {
+             return addArea();
+           }
 
-           _src = src || 'vectortile:' + val.split(/[?#]/)[0];
-           dispatch.call('change');
-           return this;
-         };
+           var ids = context.selectedIDs();
 
-         drawData.geojson = function (gj, src) {
-           if (!arguments.length) return _geojson;
-           _template = null;
-           _fileList = null;
-           _geojson = null;
-           _src = null;
-           gj = gj || {};
+           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
+             context.enter(modeSelect(context, [_areaID]));
+           } // disallow scrolling
 
-           if (Object.keys(gj).length) {
-             _geojson = ensureIDs(gj);
-             _src = src || 'unknown.geojson';
-           }
 
-           dispatch.call('change');
-           return 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%');
+             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..
 
-         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();
+           context.on('enter.intro', function (mode) {
+             if (!_areaID || !context.hasEntity(_areaID)) {
+               return continueTo(addArea);
+             }
 
-           reader.onload = function () {
-             return function (e) {
-               drawData.setFile(extension, e.target.result);
-             };
-           }();
+             var ids = context.selectedIDs();
 
-           reader.readAsText(f);
-           return this;
-         };
+             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..
 
-         drawData.url = function (url, defaultExtension) {
-           _template = null;
-           _fileList = null;
-           _geojson = null;
-           _src = null; // strip off any querystring/hash from the url before checking extension
+               context.container().select('.inspector-wrap .panewrap').style('right', '-100%'); // disallow scrolling
 
-           var testUrl = url.split(/[?#]/)[0];
-           var extension = getExtension(testUrl) || defaultExtension;
+               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);
+             }
+           });
 
-           if (extension) {
-             _template = null;
-             d3_text(url).then(function (data) {
-               drawData.setFile(extension, data);
-             })["catch"](function () {
-               /* ignore */
-             });
-           } else {
-             drawData.template(url);
+           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);
+               });
+             }
            }
 
-           return this;
-         };
+           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();
+           }
+         }
 
-         drawData.getSrc = function () {
-           return _src || '';
-         };
+         function clickAddField() {
+           if (!_areaID || !context.hasEntity(_areaID)) {
+             return addArea();
+           }
 
-         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 ids = context.selectedIDs();
 
-             switch (geom.type) {
-               case 'Point':
-                 c = [c];
+           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
+             return searchPresets();
+           }
 
-               case 'MultiPoint':
-               case 'LineString':
-                 break;
+           if (!context.container().select('.form-field-description').empty()) {
+             return continueTo(describePlayground);
+           } // disallow scrolling
 
-               case 'MultiPolygon':
-                 c = utilArrayFlatten(c);
 
-               case 'Polygon':
-               case 'MultiLineString':
-                 c = utilArrayFlatten(c);
-                 break;
-             }
-             /* eslint-enable no-fallthrough */
+           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.
 
+             var entity = context.entity(_areaID);
 
-             return utilArrayUnion(coords, c);
-           }, []);
+             if (entity.tags.description) {
+               return continueTo(play);
+             } // scroll "Add field" into view
 
-           if (!geoPolygonIntersectsPolygon(viewport, coords, true)) {
-             var extent = geoExtent(d3_geoBounds({
-               type: 'LineString',
-               coordinates: coords
-             }));
-             map.centerZoom(extent.center(), map.trimmedExtentZoom(extent));
-           }
 
-           return this;
-         };
+             var box = context.container().select('.more-fields').node().getBoundingClientRect();
 
-         init();
-         return drawData;
-       }
+             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 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 = [];
+             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
 
-           if (showTile) {
-             debugData.push({
-               "class": 'red',
-               label: 'tile'
-             });
-           }
+           context.on('exit.intro', function () {
+             return continueTo(searchPresets);
+           });
 
-           if (showCollision) {
-             debugData.push({
-               "class": 'yellow',
-               label: 'collision'
-             });
+           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 (showImagery) {
-             debugData.push({
-               "class": 'orange',
-               label: 'imagery'
-             });
+         function chooseDescriptionField() {
+           if (!_areaID || !context.hasEntity(_areaID)) {
+             return addArea();
            }
 
-           if (showTouchTargets) {
-             debugData.push({
-               "class": 'pink',
-               label: 'touchTargets'
-             });
-           }
+           var ids = context.selectedIDs();
 
-           if (showDownloaded) {
-             debugData.push({
-               "class": 'purple',
-               label: 'downloaded'
-             });
+           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
+             return searchPresets();
            }
 
-           var legend = context.container().select('.main-content').selectAll('.debug-legend').data(debugData.length ? [0] : []);
-           legend.exit().remove();
-           legend = legend.enter().append('div').attr('class', 'fillD debug-legend').merge(legend);
-           var legendItems = legend.selectAll('.debug-legend-item').data(debugData, function (d) {
-             return d.label;
-           });
-           legendItems.exit().remove();
-           legendItems.enter().append('span').attr('class', function (d) {
-             return "debug-legend-item ".concat(d["class"]);
-           }).text(function (d) {
-             return d.label;
-           });
-           var layer = selection.selectAll('.layer-debug').data(showImagery || showDownloaded ? [0] : []);
-           layer.exit().remove();
-           layer = layer.enter().append('g').attr('class', 'layer-debug').merge(layer); // imagery
-
-           var 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
+           if (!context.container().select('.form-field-description').empty()) {
+             return continueTo(describePlayground);
+           } // Make sure combobox is ready..
 
-           var osm = context.connection();
-           var dataDownloaded = [];
 
-           if (osm && showDownloaded) {
-             var rtree = osm.caches('get').tile.rtree;
-             dataDownloaded = rtree.all().map(function (bbox) {
-               return {
-                 type: 'Feature',
-                 properties: {
-                   id: bbox.id
-                 },
-                 geometry: {
-                   type: 'Polygon',
-                   coordinates: [[[bbox.minX, bbox.minY], [bbox.minX, bbox.maxY], [bbox.maxX, bbox.maxY], [bbox.maxX, bbox.minY], [bbox.minX, bbox.minY]]]
-                 }
-               };
-             });
-           }
+           if (context.container().select('div.combobox').empty()) {
+             return continueTo(clickAddField);
+           } // Watch for the combobox to go away..
 
-           var downloaded = layer.selectAll('path.debug-downloaded').data(showDownloaded ? dataDownloaded : []);
-           downloaded.exit().remove();
-           downloaded.enter().append('path').attr('class', 'debug-downloaded debug purple'); // update
 
-           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.
+           var watcher;
+           watcher = window.setInterval(function () {
+             if (context.container().select('div.combobox').empty()) {
+               window.clearInterval(watcher);
+               timeout(function () {
+                 if (context.container().select('.form-field-description').empty()) {
+                   continueTo(retryChooseDescription);
+                 } else {
+                   continueTo(describePlayground);
+                 }
+               }, 300); // after description field added.
+             }
+           }, 300);
+           reveal('div.combobox', helpHtml('intro.areas.choose_field', {
+             field: descriptionField.label()
+           }), {
+             duration: 300
+           });
+           context.on('exit.intro', function () {
+             return continueTo(searchPresets);
+           });
 
+           function continueTo(nextStep) {
+             if (watcher) window.clearInterval(watcher);
+             context.on('exit.intro', null);
+             nextStep();
+           }
+         }
 
-         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 describePlayground() {
+           if (!_areaID || !context.hasEntity(_areaID)) {
+             return addArea();
            }
-         };
 
-         return drawDebug;
-       }
+           var ids = context.selectedIDs();
 
-       /*
-           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.
-       */
+           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
+             return searchPresets();
+           } // reset pane, in case user happened to change it..
 
-       function svgDefs(context) {
-         var _defsSelection = select(null);
 
-         var _spritesheetIds = ['iD-sprite', 'maki-sprite', 'temaki-sprite', 'fa-sprite', 'community-sprite'];
+           context.container().select('.inspector-wrap .panewrap').style('right', '0%');
 
-         function drawDefs(selection) {
-           _defsSelection = selection.append('defs'); // add markers
+           if (context.container().select('.form-field-description').empty()) {
+             return continueTo(retryChooseDescription);
+           }
 
-           _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)
+           context.on('exit.intro', function () {
+             continueTo(play);
+           });
+           reveal('.entity-editor-pane', helpHtml('intro.areas.describe_playground', {
+             button: icon('#iD-icon-close', 'inline')
+           }), {
+             duration: 300
+           });
 
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             nextStep();
+           }
+         }
 
-           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 retryChooseDescription() {
+           if (!_areaID || !context.hasEntity(_areaID)) {
+             return addArea();
            }
 
-           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
+           var ids = context.selectedIDs();
 
-           addSidedMarker('coastline', '#77dede', 1);
-           addSidedMarker('waterway', '#77dede', 1); // barriers have a dashed line, and separating the triangle
-           // from the line visually suits that
+           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
+             return searchPresets();
+           } // reset pane, in case user happened to change it..
 
-           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');
+           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);
+           });
 
-           _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
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             nextStep();
+           }
+         }
 
+         function play() {
+           dispatch.call('done');
+           reveal('.ideditor', helpHtml('intro.areas.play', {
+             next: _t('intro.lines.title')
+           }), {
+             tooltipBox: '.intro-nav-wrap .chapter-line',
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: function buttonCallback() {
+               reveal('.ideditor');
+             }
+           });
+         }
 
-           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');
+         chapter.enter = function () {
+           addArea();
+         };
 
-           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
+         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);
+         };
 
-           _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
+         chapter.restart = function () {
+           chapter.exit();
+           chapter.enter();
+         };
 
+         return utilRebind(chapter, dispatch, 'on');
+       }
 
-           addSprites(_spritesheetIds, true);
+       function uiIntroLine(context, reveal) {
+         var dispatch = dispatch$8('done');
+         var timeouts = [];
+         var _tulipRoadID = null;
+         var flowerRoadID = 'w646';
+         var tulipRoadStart = [-85.6297754121684, 41.95805253325314];
+         var tulipRoadMidpoint = [-85.62975395449628, 41.95787501510204];
+         var tulipRoadIntersection = [-85.62974496187628, 41.95742515554585];
+         var roadCategory = _mainPresetIndex.item('category-road_minor');
+         var residentialPreset = _mainPresetIndex.item('highway/residential');
+         var woodRoadID = 'w525';
+         var woodRoadEndID = 'n2862';
+         var woodRoadAddNode = [-85.62390110349587, 41.95397111462291];
+         var woodRoadDragEndpoint = [-85.623867390213, 41.95466987786487];
+         var woodRoadDragMidpoint = [-85.62386254803509, 41.95430395953872];
+         var washingtonStreetID = 'w522';
+         var twelfthAvenueID = 'w1';
+         var eleventhAvenueEndID = 'n3550';
+         var twelfthAvenueEndID = 'n5';
+         var _washingtonSegmentID = null;
+         var eleventhAvenueEnd = context.entity(eleventhAvenueEndID).loc;
+         var twelfthAvenueEnd = context.entity(twelfthAvenueEndID).loc;
+         var deleteLinesLoc = [-85.6219395542764, 41.95228033922477];
+         var twelfthAvenue = [-85.62219310052491, 41.952505413152956];
+         var chapter = {
+           title: 'intro.lines.title'
+         };
+
+         function timeout(f, t) {
+           timeouts.push(window.setTimeout(f, t));
          }
 
-         function addSprites(ids, overrideColors) {
-           _spritesheetIds = utilArrayUniq(_spritesheetIds.concat(ids));
+         function eventCancel(d3_event) {
+           d3_event.stopPropagation();
+           d3_event.preventDefault();
+         }
 
-           var spritesheets = _defsSelection.selectAll('.spritesheet').data(_spritesheetIds);
+         function addLine() {
+           context.enter(modeBrowse(context));
+           context.history().reset('initial');
+           var msec = transitionTime(tulipRoadStart, context.map().center());
 
-           spritesheets.enter().append('g').attr('class', function (d) {
-             return 'spritesheet spritesheet-' + d;
-           }).each(function (d) {
-             var url = context.imagePath(d + '.svg');
-             var node = select(this).node();
-             svg(url).then(function (svg) {
-               node.appendChild(select(svg.documentElement).attr('id', 'ideditor-' + d).node());
+           if (msec) {
+             reveal(null, null, {
+               duration: 0
+             });
+           }
 
-               if (overrideColors && d !== 'iD-sprite') {
-                 // allow icon colors to be overridden..
-                 select(node).selectAll('path').attr('fill', 'currentColor');
-               }
-             })["catch"](function () {
-               /* ignore */
+           context.map().centerZoomEase(tulipRoadStart, 18.5, msec);
+           timeout(function () {
+             var tooltip = reveal('button.add-line', helpHtml('intro.lines.add_line'));
+             tooltip.selectAll('.popover-inner').insert('svg', 'span').attr('class', 'tooltip-illustration').append('use').attr('xlink:href', '#iD-graphic-lines');
+             context.on('enter.intro', function (mode) {
+               if (mode.id !== 'add-line') return;
+               continueTo(startLine);
+             });
+           }, msec + 100);
+
+           function continueTo(nextStep) {
+             context.on('enter.intro', null);
+             nextStep();
+           }
+         }
+
+         function startLine() {
+           if (context.mode().id !== 'add-line') return chapter.restart();
+           _tulipRoadID = null;
+           var padding = 70 * Math.pow(2, context.map().zoom() - 18);
+           var box = pad(tulipRoadStart, padding, context);
+           box.height = box.height + 100;
+           var textId = context.lastPointerType() === 'mouse' ? 'start_line' : 'start_line_tap';
+           var startLineString = helpHtml('intro.lines.missing_road') + '{br}' + helpHtml('intro.lines.line_draw_info') + helpHtml('intro.lines.' + textId);
+           reveal(box, startLineString);
+           context.map().on('move.intro drawn.intro', function () {
+             padding = 70 * Math.pow(2, context.map().zoom() - 18);
+             box = pad(tulipRoadStart, padding, context);
+             box.height = box.height + 100;
+             reveal(box, startLineString, {
+               duration: 0
              });
            });
-           spritesheets.exit().remove();
+           context.on('enter.intro', function (mode) {
+             if (mode.id !== 'draw-line') return chapter.restart();
+             continueTo(drawLine);
+           });
+
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             nextStep();
+           }
          }
 
-         drawDefs.addSprites = addSprites;
-         return drawDefs;
-       }
+         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..
 
-       var _layerEnabled = false;
+           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();
+             }
+           });
 
-       var _qaService;
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.history().on('change.intro', null);
+             context.on('enter.intro', null);
+             nextStep();
+           }
+         }
 
-       function svgKeepRight(projection, context, dispatch) {
-         var throttledRedraw = throttle(function () {
-           return dispatch.call('change');
-         }, 1000);
+         function isLineConnected() {
+           var entity = _tulipRoadID && context.hasEntity(_tulipRoadID);
 
-         var minZoom = 12;
-         var touchLayer = select(null);
-         var drawLayer = select(null);
-         var layerVisible = false;
+           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 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 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 getService() {
-           if (services.keepRight && !_qaService) {
-             _qaService = services.keepRight;
+           var entity = _tulipRoadID && context.hasEntity(_tulipRoadID);
 
-             _qaService.on('loaded', throttledRedraw);
-           } else if (!services.keepRight && _qaService) {
-             _qaService = null;
+           if (!entity) return chapter.restart();
+           context.map().centerEase(tulipRoadIntersection, 500);
+           var continueLineText = helpHtml('intro.lines.continue_line') + '{br}' + helpHtml('intro.lines.finish_line_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap')) + helpHtml('intro.lines.finish_road');
+           reveal('.surface', continueLineText);
+           context.on('enter.intro', function (mode) {
+             if (mode.id === 'draw-line') {
+               return;
+             } else if (mode.id === 'select') {
+               return continueTo(chooseCategoryRoad);
+             } else {
+               return chapter.restart();
+             }
+           });
+
+           function continueTo(nextStep) {
+             context.on('enter.intro', null);
+             nextStep();
            }
+         }
 
-           return _qaService;
-         } // Show the markers
+         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 editOn() {
-           if (!layerVisible) {
-             layerVisible = true;
-             drawLayer.style('display', 'block');
+           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();
            }
-         } // Immediately remove the markers and their touch targets
+         }
 
+         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 editOff() {
-           if (layerVisible) {
-             layerVisible = false;
-             drawLayer.style('display', 'none');
-             drawLayer.selectAll('.qaItem.keepRight').remove();
-             touchLayer.selectAll('.qaItem.keepRight').remove();
+           function continueTo(nextStep) {
+             context.container().select('.preset-list-button').on('click.intro', null);
+             context.on('exit.intro', null);
+             nextStep();
            }
-         } // Enable the layer.  This shows the markers and transitions them to visible.
+         } // selected wrong road type
 
 
-         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 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 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');
+         function nameRoad() {
+           context.on('exit.intro', function () {
+             continueTo(didNameRoad);
            });
-         } // Update the issue markers
+           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();
+           }
+         }
 
-         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 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);
 
-           var markers = drawLayer.selectAll('.qaItem.keepRight').data(data, function (d) {
-             return d.id;
-           }); // exit
+           function continueTo(nextStep) {
+             nextStep();
+           }
+         }
 
-           markers.exit().remove(); // enter
+         function updateLine() {
+           context.history().reset('doneAddLine');
 
-           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 (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+             return chapter.restart();
+           }
 
-           markers.merge(markersEnter).sort(sortY).classed('selected', function (d) {
-             return d.id === selectedID;
-           }).attr('transform', getTransform); // Draw targets..
+           var msec = transitionTime(woodRoadDragMidpoint, context.map().center());
 
-           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
+           if (msec) {
+             reveal(null, null, {
+               duration: 0
+             });
+           }
 
-           targets.exit().remove(); // enter/update
+           context.map().centerZoomEase(woodRoadDragMidpoint, 19, msec);
+           timeout(function () {
+             var padding = 250 * Math.pow(2, context.map().zoom() - 19);
+             var box = pad(woodRoadDragMidpoint, padding, context);
 
-           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 advance = function advance() {
+               continueTo(addNode);
+             };
 
-           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.
+             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 drawKeepRight(selection) {
-           var service = getService();
-           var surface = context.surface();
+         function addNode() {
+           context.history().reset('doneAddLine');
 
-           if (surface && !surface.empty()) {
-             touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
+           if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+             return chapter.restart();
            }
 
-           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);
+           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);
+             }
 
-           if (_layerEnabled) {
-             if (service && ~~context.map().zoom() >= minZoom) {
-               editOn();
-               service.loadIssues(projection);
-               updateMarkers();
-             } else {
-               editOff();
+             if (changed.created().length === 1) {
+               timeout(function () {
+                 continueTo(startDragEndpoint);
+               }, 500);
+             }
+           });
+           context.on('enter.intro', function (mode) {
+             if (mode.id !== 'select') {
+               continueTo(updateLine);
              }
+           });
+
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.history().on('change.intro', null);
+             context.on('enter.intro', null);
+             nextStep();
            }
-         } // Toggles the layer on and off
+         }
 
+         function startDragEndpoint() {
+           if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+             return continueTo(updateLine);
+           }
 
-         drawKeepRight.enabled = function (val) {
-           if (!arguments.length) return _layerEnabled;
-           _layerEnabled = val;
+           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);
+             }
 
-           if (_layerEnabled) {
-             layerOn();
-           } else {
-             layerOff();
+             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 (context.selectedErrorID()) {
-               context.enter(modeBrowse(context));
+             if (geoSphericalDistance(entity.loc, woodRoadDragEndpoint) <= 4) {
+               continueTo(finishDragEndpoint);
              }
-           }
-
-           dispatch.call('change');
-           return this;
-         };
+           });
 
-         drawKeepRight.supported = function () {
-           return !!getService();
-         };
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             nextStep();
+           }
+         }
 
-         return drawKeepRight;
-       }
+         function finishDragEndpoint() {
+           if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+             return continueTo(updateLine);
+           }
 
-       function svgGeolocate(projection) {
-         var layer = select(null);
+           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);
+             }
 
-         var _position;
+             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 init() {
-           if (svgGeolocate.initialized) return; // run once
+             if (geoSphericalDistance(entity.loc, woodRoadDragEndpoint) > 4) {
+               continueTo(startDragEndpoint);
+             }
+           });
+           context.on('enter.intro', function () {
+             continueTo(startDragMidpoint);
+           });
 
-           svgGeolocate.enabled = false;
-           svgGeolocate.initialized = true;
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             nextStep();
+           }
          }
 
-         function showLayer() {
-           layer.style('display', 'block');
-         }
+         function startDragMidpoint() {
+           if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+             return continueTo(updateLine);
+           }
 
-         function hideLayer() {
-           layer.transition().duration(250).style('opacity', 0);
-         }
+           if (context.selectedIDs().indexOf(woodRoadID) === -1) {
+             context.enter(modeSelect(context, [woodRoadID]));
+           }
 
-         function layerOn() {
-           layer.style('opacity', 0).transition().duration(250).style('opacity', 1);
-         }
+           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 layerOff() {
-           layer.style('display', 'none');
-         }
+             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 transform(d) {
-           return svgPointTransform(projection)(d);
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.history().on('change.intro', null);
+             context.on('enter.intro', null);
+             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...
+         function continueDragMidpoint() {
+           if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+             return continueTo(updateLine);
+           }
 
-           return Math.round(projectedLoc[1] - projectedTangent[1]).toString();
-         }
+           var padding = 100 * Math.pow(2, context.map().zoom() - 19);
+           var box = pad(woodRoadDragEndpoint, padding, context);
+           box.height += 400;
 
-         function update() {
-           var geolocation = {
-             loc: [_position.coords.longitude, _position.coords.latitude]
+           var advance = function advance() {
+             context.history().checkpoint('doneUpdateLine');
+             continueTo(deleteLines);
            };
-           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);
+           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);
+             }
 
-           if (enabled) {
-             update();
-           } else {
-             layerOff();
+             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
+             });
+           });
+
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             nextStep();
            }
          }
 
-         drawLocation.enabled = function (position, enabled) {
-           if (!arguments.length) return svgGeolocate.enabled;
-           _position = position;
-           svgGeolocate.enabled = enabled;
+         function deleteLines() {
+           context.history().reset('doneUpdateLine');
+           context.enter(modeBrowse(context));
 
-           if (svgGeolocate.enabled) {
-             showLayer();
-             layerOn();
-           } else {
-             hideLayer();
+           if (!context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+             return chapter.restart();
            }
 
-           return this;
-         };
-
-         init();
-         return drawLocation;
-       }
-
-       function svgLabels(projection, context) {
-         var path = d3_geoPath(projection);
-         var detected = utilDetect();
-         var baselineHack = detected.ie || detected.browser.toLowerCase() === 'edge' || detected.browser.toLowerCase() === 'firefox' && detected.version >= 70;
-
-         var _rdrawn = new RBush();
+           var msec = transitionTime(deleteLinesLoc, context.map().center());
 
-         var _rskipped = new RBush();
+           if (msec) {
+             reveal(null, null, {
+               duration: 0
+             });
+           }
 
-         var _textWidthCache = {};
-         var _entitybboxes = {}; // Listed from highest to lowest priority
+           context.map().centerZoomEase(deleteLinesLoc, 18, msec);
+           timeout(function () {
+             var padding = 200 * Math.pow(2, context.map().zoom() - 18);
+             var box = pad(deleteLinesLoc, padding, context);
+             box.top -= 200;
+             box.height += 400;
 
-         var 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]];
+             var advance = function advance() {
+               continueTo(rightClickIntersection);
+             };
 
-         function shouldSkipIcon(preset) {
-           var noIcons = ['building', 'landuse', 'natural'];
-           return noIcons.some(function (s) {
-             return preset.id.indexOf(s) >= 0;
-           });
-         }
+             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);
 
-         function get(array, prop) {
-           return function (d, i) {
-             return array[i][prop];
-           };
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
+           }
          }
 
-         function textWidth(text, size, elem) {
-           var c = _textWidthCache[size];
-           if (!c) c = _textWidthCache[size] = {};
-
-           if (c[text]) {
-             return c[text];
-           } else if (elem) {
-             c[text] = elem.getComputedTextLength();
-             return c[text];
-           } else {
-             var str = encodeURIComponent(text).match(/%[CDEFcdef]/g);
+         function 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);
 
-             if (str === null) {
-               return size / 3 * 2 * text.length;
-             } else {
-               return size / 3 * (2 * text.length + str.length);
-             }
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
            }
          }
 
-         function drawLinePaths(selection, entities, filter, classes, labels) {
-           var paths = selection.selectAll('path').filter(filter).data(entities, osmEntity.key); // exit
+         function splitIntersection() {
+           if (!context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+             return continueTo(deleteLines);
+           }
 
-           paths.exit().remove(); // enter/update
+           var node = selectMenuItem(context, 'split').node();
 
-           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'));
-         }
+           if (!node) {
+             return continueTo(rightClickIntersection);
+           }
 
-         function drawLineLabels(selection, entities, filter, classes, labels) {
-           var texts = selection.selectAll('text.' + classes).filter(filter).data(entities, osmEntity.key); // exit
+           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();
 
-           texts.exit().remove(); // enter
+             if (!wasChanged && !node) {
+               return continueTo(rightClickIntersection);
+             }
 
-           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
+             reveal('.edit-menu', helpHtml('intro.lines.split_intersection', {
+               street: _t('intro.graph.name.washington-street')
+             }), {
+               duration: 0,
+               padding: 50
+             });
+           });
+           context.history().on('change.intro', function (changed) {
+             wasChanged = true;
+             timeout(function () {
+               if (context.history().undoAnnotation() === _t('operations.split.annotation.line', {
+                 n: 1
+               })) {
+                 _washingtonSegmentID = changed.created()[0].id;
+                 continueTo(didSplit);
+               } else {
+                 _washingtonSegmentID = null;
+                 continueTo(retrySplit);
+               }
+             }, 300); // after any transition (e.g. if user deleted intersection)
+           });
 
-           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.map().on('move.intro drawn.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
+           }
          }
 
-         function drawPointLabels(selection, entities, filter, classes, labels) {
-           var texts = selection.selectAll('text.' + classes).filter(filter).data(entities, osmEntity.key); // exit
+         function retrySplit() {
+           context.enter(modeBrowse(context));
+           context.map().centerZoomEase(eleventhAvenueEnd, 18, 500);
 
-           texts.exit().remove(); // enter/update
+           var advance = function advance() {
+             continueTo(rightClickIntersection);
+           };
 
-           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 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 drawAreaLabels(selection, entities, filter, classes, labels) {
-           entities = entities.filter(hasText);
-           labels = labels.filter(hasText);
-           drawPointLabels(selection, entities, filter, classes, labels);
 
-           function hasText(d, i) {
-             return labels[i].hasOwnProperty('x') && labels[i].hasOwnProperty('y');
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             nextStep();
            }
          }
 
-         function drawAreaIcons(selection, entities, filter, classes, labels) {
-           var icons = selection.selectAll('use.' + classes).filter(filter).data(entities, osmEntity.key); // exit
+         function didSplit() {
+           if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+             return continueTo(rightClickIntersection);
+           }
 
-           icons.exit().remove(); // enter/update
+           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
 
-           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;
+           context.on('enter.intro', function () {
+             var ids = context.selectedIDs();
 
-             if (!picon) {
-               return '';
-             } else {
-               var isMaki = /^maki-/.test(picon);
-               return '#' + picon + (isMaki ? '-15' : '');
+             if (ids.length === 1 && ids[0] === _washingtonSegmentID) {
+               continueTo(multiSelect);
+             }
+           });
+           context.history().on('change.intro', function () {
+             if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+               return continueTo(rightClickIntersection);
              }
            });
-         }
-
-         function drawCollisionBoxes(selection, rtree, which) {
-           var classes = 'debug ' + which + ' ' + (which === 'debug-skipped' ? 'orange' : 'yellow');
-           var gj = [];
 
-           if (context.getDebug('collision')) {
-             gj = rtree.all().map(function (d) {
-               return {
-                 type: 'Polygon',
-                 coordinates: [[[d.minX, d.minY], [d.maxX, d.minY], [d.maxX, d.maxY], [d.minX, d.maxY], [d.minX, d.minY]]]
-               };
-             });
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
            }
-
-           var boxes = selection.selectAll('.' + which).data(gj); // exit
-
-           boxes.exit().remove(); // enter/update
-
-           boxes.enter().append('path').attr('class', classes).merge(boxes).attr('d', d3_geoPath());
          }
 
-         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;
-
-           for (i = 0; i < labelStack.length; i++) {
-             labelable.push([]);
+         function multiSelect() {
+           if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+             return continueTo(rightClickIntersection);
            }
 
-           if (fullRedraw) {
-             _rdrawn.clear();
-
-             _rskipped.clear();
+           var ids = context.selectedIDs();
+           var hasWashington = ids.indexOf(_washingtonSegmentID) !== -1;
+           var hasTwelfth = ids.indexOf(twelfthAvenueID) !== -1;
 
-             _entitybboxes = {};
-           } else {
-             for (i = 0; i < entities.length; i++) {
-               entity = entities[i];
-               var toRemove = [].concat(_entitybboxes[entity.id] || []).concat(_entitybboxes[entity.id + 'I'] || []);
+           if (hasWashington && hasTwelfth) {
+             return continueTo(multiRightClick);
+           } else if (!hasWashington && !hasTwelfth) {
+             return continueTo(didSplit);
+           }
 
-               for (j = 0; j < toRemove.length; j++) {
-                 _rdrawn.remove(toRemove[j]);
+           context.map().centerZoomEase(twelfthAvenue, 18, 500);
+           timeout(function () {
+             var selected, other, padding, box;
 
-                 _rskipped.remove(toRemove[j]);
-               }
+             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;
              }
-           } // Loop through all the entities to do some preprocessing
-
-
-           for (i = 0; i < entities.length; i++) {
-             entity = entities[i];
-             geometry = entity.geometry(graph); // Insert collision boxes around interesting points/vertices
 
-             if (geometry === 'point' || geometry === 'vertex' && isInterestingVertex(entity)) {
-               var hasDirections = entity.directions(graph, projection).length;
-               var markerPadding;
-
-               if (!wireframe && geometry === 'point' && !(zoom >= 18 && hasDirections)) {
-                 renderNodeAs[entity.id] = 'point';
-                 markerPadding = 20; // extra y for marker height
+             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 {
-                 renderNodeAs[entity.id] = 'vertex';
-                 markerPadding = 0;
+                 selected = _t('intro.graph.name.12th-avenue');
+                 other = _t('intro.graph.name.washington-street');
+                 padding = 200 * Math.pow(2, context.map().zoom() - 18);
+                 box = pad(twelfthAvenue, padding, context);
+                 box.width /= 2;
                }
 
-               var coord = projection(entity.loc);
-               var nodePadding = 10;
-               var bbox = {
-                 minX: coord[0] - nodePadding,
-                 minY: coord[1] - nodePadding - markerPadding,
-                 maxX: coord[0] + nodePadding,
-                 maxY: coord[1] + nodePadding
-               };
-               doInsert(bbox, entity.id + 'P');
-             } // From here on, treat vertices like points
-
-
-             if (geometry === 'vertex') {
-               geometry = 'point';
-             } // Determine which entities are label-able
-
-
-             var preset = geometry === 'area' && _mainPresetIndex.match(entity, graph);
-             var icon = preset && !shouldSkipIcon(preset) && preset.icon;
-             if (!icon && !utilDisplayName(entity)) continue;
-
-             for (k = 0; k < labelStack.length; k++) {
-               var matchGeom = labelStack[k][0];
-               var matchKey = labelStack[k][1];
-               var matchVal = labelStack[k][2];
-               var hasVal = entity.tags[matchKey];
-
-               if (geometry === matchGeom && hasVal && (matchVal === '*' || matchVal === hasVal)) {
-                 labelable[k].push(entity);
-                 break;
+               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);
                }
-             }
-           }
-
-           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];
-
-             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;
+             });
+           }, 600);
 
-               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);
-               }
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
+           }
+         }
 
-               if (p) {
-                 if (geometry === 'vertex') {
-                   geometry = 'point';
-                 } // treat vertex like point
+         function multiRightClick() {
+           if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+             return continueTo(rightClickIntersection);
+           }
 
+           var padding = 200 * Math.pow(2, context.map().zoom() - 18);
+           var box = pad(twelfthAvenue, padding, context);
+           var rightClickString = helpHtml('intro.lines.multi_select_success') + helpHtml('intro.lines.multi_' + (context.lastPointerType() === 'mouse' ? 'rightclick' : 'edit_menu_touch'));
+           reveal(box, rightClickString);
+           context.map().on('move.intro drawn.intro', function () {
+             var padding = 200 * Math.pow(2, context.map().zoom() - 18);
+             var box = pad(twelfthAvenue, padding, context);
+             reveal(box, rightClickString, {
+               duration: 0
+             });
+           });
+           context.ui().editMenu().on('toggled.intro', function (open) {
+             if (!open) return;
+             timeout(function () {
+               var ids = context.selectedIDs();
 
-                 p.classes = geometry + ' tag-' + labelStack[k][1];
-                 positions[geometry].push(p);
-                 labelled[geometry].push(entity);
+               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 isInterestingVertex(entity) {
-             var selectedIDs = context.selectedIDs();
-             return entity.hasInterestingTags() || entity.isEndpoint(graph) || entity.isConnected(graph) || selectedIDs.indexOf(entity.id) !== -1 || graph.parentWays(entity).some(function (parent) {
-               return selectedIDs.indexOf(parent.id) !== -1;
-             });
+           function 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 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;
+         function multiDelete() {
+           if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+             return continueTo(rightClickIntersection);
+           }
 
-             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
-               };
+           var node = selectMenuItem(context, 'delete').node();
+           if (!node) return continueTo(multiRightClick);
+           reveal('.edit-menu', helpHtml('intro.lines.multi_delete'), {
+             padding: 50
+           });
+           context.map().on('move.intro drawn.intro', function () {
+             reveal('.edit-menu', helpHtml('intro.lines.multi_delete'), {
+               duration: 0,
+               padding: 50
+             });
+           });
+           context.on('exit.intro', function () {
+             if (context.hasEntity(_washingtonSegmentID) || context.hasEntity(twelfthAvenueID)) {
+               return continueTo(multiSelect); // left select mode but roads still exist
+             }
+           });
+           context.history().on('change.intro', function () {
+             if (context.hasEntity(_washingtonSegmentID) || context.hasEntity(twelfthAvenueID)) {
+               continueTo(retryDelete); // changed something but roads still exist
              } else {
-               bbox = {
-                 minX: p.x - textPadding,
-                 minY: p.y - height / 2 - textPadding,
-                 maxX: p.x + width + textPadding,
-                 maxY: p.y + height / 2 + textPadding
-               };
+               continueTo(play);
              }
+           });
 
-             if (tryInsert([bbox], entity.id, true)) {
-               return p;
-             }
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('exit.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
            }
+         }
 
-           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
-
-             var lineOffsets = [50, 45, 55, 40, 60, 35, 65, 30, 70, 25, 75, 20, 80, 15, 95, 10, 90, 5, 95];
-             var padding = 3;
-
-             for (var i = 0; i < lineOffsets.length; i++) {
-               var offset = lineOffsets[i];
-               var middle = offset / 100 * length;
-               var start = middle - width / 2;
-               if (start < 0 || start + width > length) continue; // generate subpath and ignore paths that are invalid or don't cross viewport.
-
-               var sub = subpath(points, start, start + width);
-
-               if (!sub || !geoPolygonIntersectsPolygon(viewport, sub, true)) {
-                 continue;
-               }
-
-               var isReverse = reverse(sub);
-
-               if (isReverse) {
-                 sub = sub.reverse();
-               }
+         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);
+             }
+           });
 
-               var bboxes = [];
-               var boxsize = (height + 2) / 2;
+           function continueTo(nextStep) {
+             nextStep();
+           }
+         }
 
-               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
+         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');
+             }
+           });
+         }
 
-                 var num = Math.max(1, Math.floor(geoVecLength(a, b) / boxsize / 2));
+         chapter.enter = function () {
+           addLine();
+         };
 
-                 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)
-                   });
-                 }
-               }
+         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);
+         };
 
-               if (tryInsert(bboxes, entity.id, false)) {
-                 // accept this one
-                 return {
-                   'font-size': height + 2,
-                   lineString: lineString(sub),
-                   startOffset: offset + '%'
-                 };
-               }
-             }
+         chapter.restart = function () {
+           chapter.exit();
+           chapter.enter();
+         };
 
-             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);
-             }
+         return utilRebind(chapter, dispatch, 'on');
+       }
 
-             function lineString(points) {
-               return 'M' + points.join('L');
-             }
+       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 subpath(points, from, to) {
-               var sofar = 0;
-               var start, end, i0, i1;
+         function timeout(f, t) {
+           timeouts.push(window.setTimeout(f, t));
+         }
 
-               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 eventCancel(d3_event) {
+           d3_event.stopPropagation();
+           d3_event.preventDefault();
+         }
 
-                 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 revealHouse(center, text, options) {
+           var padding = 160 * Math.pow(2, context.map().zoom() - 20);
+           var box = pad(center, padding, context);
+           reveal(box, text, options);
+         }
 
-                 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 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);
+         }
 
-                 sofar += current;
-               }
+         function addHouse() {
+           context.enter(modeBrowse(context));
+           context.history().reset('initial');
+           _houseID = null;
+           var msec = transitionTime(house, context.map().center());
 
-               var result = points.slice(i0, i1);
-               result.unshift(start);
-               result.push(end);
-               return result;
-             }
+           if (msec) {
+             reveal(null, null, {
+               duration: 0
+             });
            }
 
-           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 = {};
+           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 (picon) {
-               // icon and label..
-               if (addIcon()) {
-                 addLabel(iconSize + padding);
-                 return p;
-               }
-             } else {
-               // label only..
-               if (addLabel(0)) {
-                 return p;
-               }
-             }
+           function continueTo(nextStep) {
+             context.on('enter.intro', null);
+             nextStep();
+           }
+         }
 
-             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 startHouse() {
+           if (context.mode().id !== 'add-area') {
+             return continueTo(addHouse);
+           }
 
-               if (tryInsert([bbox], entity.id + 'I', true)) {
-                 p.transform = 'translate(' + iconX + ',' + iconY + ')';
-                 return true;
-               }
+           _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
 
-               return false;
-             }
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             nextStep();
+           }
+         }
 
-             function addLabel(yOffset) {
-               if (width && areaWidth >= width + 20) {
-                 var labelX = centroid[0];
-                 var labelY = centroid[1] + yOffset;
-                 var bbox = {
-                   minX: labelX - width / 2 - padding,
-                   minY: labelY - height / 2 - padding,
-                   maxX: labelX + width / 2 + padding,
-                   maxY: labelY + height / 2 + padding
-                 };
+         function continueHouse() {
+           if (context.mode().id !== 'draw-area') {
+             return continueTo(addHouse);
+           }
 
-                 if (tryInsert([bbox], entity.id, true)) {
-                   p.x = labelX;
-                   p.y = labelY;
-                   p.textAnchor = 'middle';
-                   p.height = height;
-                   return true;
-                 }
-               }
+           _houseID = null;
+           var continueString = helpHtml('intro.buildings.continue_building') + '{br}' + helpHtml('intro.areas.finish_area_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap')) + helpHtml('intro.buildings.finish_building');
+           revealHouse(house, continueString);
+           context.map().on('move.intro drawn.intro', function () {
+             revealHouse(house, continueString, {
+               duration: 0
+             });
+           });
+           context.on('enter.intro', function (mode) {
+             if (mode.id === 'draw-area') {
+               return;
+             } else if (mode.id === 'select') {
+               var graph = context.graph();
+               var way = context.entity(context.selectedIDs()[0]);
+               var nodes = graph.childNodes(way);
+               var points = utilArrayUniq(nodes).map(function (n) {
+                 return context.projection(n.loc);
+               });
 
-               return false;
+               if (isMostlySquare(points)) {
+                 _houseID = way.id;
+                 return continueTo(chooseCategoryBuilding);
+               } else {
+                 return continueTo(retryHouse);
+               }
+             } else {
+               return chapter.restart();
              }
-           } // force insert a singular bounding box
-           // singular box only, no array, id better be unique
+           });
 
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             nextStep();
+           }
+         }
 
-           function doInsert(bbox, id) {
-             bbox.id = id;
-             var oldbox = _entitybboxes[id];
+         function retryHouse() {
+           var onClick = function onClick() {
+             continueTo(addHouse);
+           };
 
-             if (oldbox) {
-               _rdrawn.remove(oldbox);
-             }
+           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
+             });
+           });
 
-             _entitybboxes[id] = bbox;
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             nextStep();
+           }
+         }
 
-             _rdrawn.insert(bbox);
+         function chooseCategoryBuilding() {
+           if (!_houseID || !context.hasEntity(_houseID)) {
+             return addHouse();
            }
 
-           function tryInsert(bboxes, id, saveSkipped) {
-             var skipped = false;
+           var ids = context.selectedIDs();
 
-             for (var i = 0; i < bboxes.length; i++) {
-               var bbox = bboxes[i];
-               bbox.id = id; // Check that label is visible
+           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
+             context.enter(modeSelect(context, [_houseID]));
+           } // disallow scrolling
 
-               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;
-               }
+           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);
              }
 
-             _entitybboxes[id] = bboxes;
+             var ids = context.selectedIDs();
 
-             if (skipped) {
-               if (saveSkipped) {
-                 _rskipped.load(bboxes);
-               }
-             } else {
-               _rdrawn.load(bboxes);
+             if (mode.id !== 'select' || !ids.length || ids[0] !== _houseID) {
+               return continueTo(chooseCategoryBuilding);
              }
+           });
 
-             return !skipped;
+           function continueTo(nextStep) {
+             context.container().select('.inspector-wrap').on('wheel.intro', null);
+             context.container().select('.preset-list-button').on('click.intro', null);
+             context.on('enter.intro', null);
+             nextStep();
            }
+         }
 
-           var 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 choosePresetHouse() {
+           if (!_houseID || !context.hasEntity(_houseID)) {
+             return addHouse();
+           }
 
-           drawPointLabels(label, labelled.point, filter, 'pointlabel', positions.point);
-           drawPointLabels(halo, labelled.point, filter, 'pointlabel-halo', positions.point); // lines
+           var ids = context.selectedIDs();
 
-           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 (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
+             context.enter(modeSelect(context, [_houseID]));
+           } // disallow scrolling
 
-           drawAreaLabels(label, labelled.area, filter, 'arealabel', positions.area);
-           drawAreaLabels(halo, labelled.area, filter, 'arealabel-halo', positions.area);
-           drawAreaIcons(label, labelled.area, filter, 'areaicon', positions.area);
-           drawAreaIcons(halo, labelled.area, filter, 'areaicon-halo', positions.area); // debug
 
-           drawCollisionBoxes(debug, _rskipped, 'debug-skipped');
-           drawCollisionBoxes(debug, _rdrawn, 'debug-drawn');
-           layer.call(filterLabels);
-         }
+           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..
 
-         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
+           context.on('enter.intro', function (mode) {
+             if (!_houseID || !context.hasEntity(_houseID)) {
+               return continueTo(addHouse);
+             }
 
-           if (mouse) {
-             pad = 20;
-             bbox = {
-               minX: mouse[0] - pad,
-               minY: mouse[1] - pad,
-               maxX: mouse[0] + pad,
-               maxY: mouse[1] + pad
-             };
+             var ids = context.selectedIDs();
 
-             var nearMouse = _rdrawn.search(bbox).map(function (entity) {
-               return entity.id;
-             });
+             if (mode.id !== 'select' || !ids.length || ids[0] !== _houseID) {
+               return continueTo(chooseCategoryBuilding);
+             }
+           });
 
-             ids.push.apply(ids, nearMouse);
-           } // hide labels on selected nodes (they look weird when dragging / haloed)
+           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();
+           }
 
-           for (var i = 0; i < selectedIDs.length; i++) {
-             var entity = graph.hasEntity(selectedIDs[i]);
+           var ids = context.selectedIDs();
 
-             if (entity && entity.type === 'node') {
-               ids.push(selectedIDs[i]);
-             }
+           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
+             context.enter(modeSelect(context, [_houseID]));
            }
 
-           layers.selectAll(utilEntitySelector(ids)).classed('nolabel', true); // draw the mouse bbox if debugging is on..
-
-           var debug = selection.selectAll('.labels-group.debug');
-           var gj = [];
+           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 (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]]]
-             }] : [];
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             nextStep();
            }
+         }
 
-           var box = debug.selectAll('.debug-mouse').data(gj); // exit
+         function rightClickHouse() {
+           if (!_houseID) return chapter.restart();
+           context.enter(modeBrowse(context));
+           context.history().reset('hasHouse');
+           var zoom = context.map().zoom();
 
-           box.exit().remove(); // enter/update
+           if (zoom < 20) {
+             zoom = 20;
+           }
 
-           box.enter().append('path').attr('class', 'debug debug-mouse yellow').merge(box).attr('d', d3_geoPath());
+           context.map().centerZoomEase(house, zoom, 500);
+           context.on('enter.intro', function (mode) {
+             if (mode.id !== 'select') return;
+             var ids = context.selectedIDs();
+             if (ids.length !== 1 || ids[0] !== _houseID) return;
+             timeout(function () {
+               var node = selectMenuItem(context, 'orthogonalize').node();
+               if (!node) return;
+               continueTo(clickSquare);
+             }, 50); // after menu visible
+           });
+           context.map().on('move.intro drawn.intro', function () {
+             var rightclickString = helpHtml('intro.buildings.' + (context.lastPointerType() === 'mouse' ? 'rightclick_building' : 'edit_menu_building_touch'));
+             revealHouse(house, rightclickString, {
+               duration: 0
+             });
+           });
+           context.history().on('change.intro', function () {
+             continueTo(rightClickHouse);
+           });
+
+           function continueTo(nextStep) {
+             context.on('enter.intro', null);
+             context.map().on('move.intro drawn.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
+           }
          }
 
-         var throttleFilterLabels = throttle(filterLabels, 100);
+         function clickSquare() {
+           if (!_houseID) return chapter.restart();
+           var entity = context.hasEntity(_houseID);
+           if (!entity) return continueTo(rightClickHouse);
+           var node = selectMenuItem(context, 'orthogonalize').node();
 
-         drawLabels.observe = function (selection) {
-           var listener = function listener() {
-             throttleFilterLabels(selection);
-           };
+           if (!node) {
+             return continueTo(rightClickHouse);
+           }
 
-           selection.on('mousemove.hidelabels', listener);
-           context.on('enter.hidelabels', listener);
-         };
+           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();
 
-         drawLabels.off = function (selection) {
-           throttleFilterLabels.cancel();
-           selection.on('mousemove.hidelabels', null);
-           context.on('enter.hidelabels', null);
-         };
+             if (!wasChanged && !node) {
+               return continueTo(rightClickHouse);
+             }
 
-         return drawLabels;
-       }
+             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.
 
-       var _layerEnabled$1 = false;
+             timeout(function () {
+               if (context.history().undoAnnotation() === _t('operations.orthogonalize.annotation.feature', {
+                 n: 1
+               })) {
+                 continueTo(doneSquare);
+               } else {
+                 continueTo(retryClickSquare);
+               }
+             }, 500); // after transitioned actions
+           });
 
-       var _qaService$1;
+           function continueTo(nextStep) {
+             context.on('enter.intro', null);
+             context.map().on('move.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
+           }
+         }
 
-       function svgImproveOSM(projection, context, dispatch) {
-         var throttledRedraw = throttle(function () {
-           return dispatch.call('change');
-         }, 1000);
+         function retryClickSquare() {
+           context.enter(modeBrowse(context));
+           revealHouse(house, helpHtml('intro.buildings.retry_square'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: function buttonCallback() {
+               continueTo(rightClickHouse);
+             }
+           });
 
-         var minZoom = 12;
-         var touchLayer = select(null);
-         var drawLayer = select(null);
-         var layerVisible = false;
+           function continueTo(nextStep) {
+             nextStep();
+           }
+         }
 
-         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 doneSquare() {
+           context.history().checkpoint('doneSquare');
+           revealHouse(house, helpHtml('intro.buildings.done_square'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: function buttonCallback() {
+               continueTo(addTank);
+             }
+           });
 
+           function continueTo(nextStep) {
+             nextStep();
+           }
+         }
 
-         function getService() {
-           if (services.improveOSM && !_qaService$1) {
-             _qaService$1 = services.improveOSM;
+         function addTank() {
+           context.enter(modeBrowse(context));
+           context.history().reset('doneSquare');
+           _tankID = null;
+           var msec = transitionTime(tank, context.map().center());
 
-             _qaService$1.on('loaded', throttledRedraw);
-           } else if (!services.improveOSM && _qaService$1) {
-             _qaService$1 = null;
+           if (msec) {
+             reveal(null, null, {
+               duration: 0
+             });
            }
 
-           return _qaService$1;
-         } // Show the markers
+           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);
 
+           function continueTo(nextStep) {
+             context.on('enter.intro', null);
+             nextStep();
+           }
+         }
 
-         function editOn() {
-           if (!layerVisible) {
-             layerVisible = true;
-             drawLayer.style('display', 'block');
+         function startTank() {
+           if (context.mode().id !== 'add-area') {
+             return continueTo(addTank);
            }
-         } // Immediately remove the markers and their touch targets
 
+           _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 editOff() {
-           if (layerVisible) {
-             layerVisible = false;
-             drawLayer.style('display', 'none');
-             drawLayer.selectAll('.qaItem.improveOSM').remove();
-             touchLayer.selectAll('.qaItem.improveOSM').remove();
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             nextStep();
            }
-         } // Enable the layer.  This shows the markers and transitions them to visible.
+         }
 
+         function continueTank() {
+           if (context.mode().id !== 'draw-area') {
+             return continueTo(addTank);
+           }
 
-         function layerOn() {
-           editOn();
-           drawLayer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end interrupt', function () {
-             return dispatch.call('change');
+           _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
+             });
            });
-         } // 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');
+           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);
+             }
            });
-         } // Update the issue markers
-
 
-         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 continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             nextStep();
+           }
+         }
 
-           var markers = drawLayer.selectAll('.qaItem.improveOSM').data(data, function (d) {
-             return d.id;
-           }); // exit
+         function searchPresetTank() {
+           if (!_tankID || !context.hasEntity(_tankID)) {
+             return addTank();
+           }
 
-           markers.exit().remove(); // enter
+           var ids = context.selectedIDs();
 
-           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 (context.mode().id !== 'select' || !ids.length || ids[0] !== _tankID) {
+             context.enter(modeSelect(context, [_tankID]));
+           } // disallow scrolling
 
-             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..
+           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 (touchLayer.empty()) return;
-           var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
-           var targets = touchLayer.selectAll('.qaItem.improveOSM').data(data, function (d) {
-             return d.id;
-           }); // exit
+           context.on('enter.intro', function (mode) {
+             if (!_tankID || !context.hasEntity(_tankID)) {
+               return continueTo(addTank);
+             }
 
-           targets.exit().remove(); // enter/update
+             var ids = context.selectedIDs();
 
-           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 (mode.id !== 'select' || !ids.length || ids[0] !== _tankID) {
+               // keep the user's area selected..
+               context.enter(modeSelect(context, [_tankID])); // reset pane, in case user somehow happened to change it..
 
-           function 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.
+               context.container().select('.inspector-wrap .panewrap').style('right', '-100%'); // disallow scrolling
 
+               context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+               context.container().select('.preset-search-input').on('keydown.intro', null).on('keyup.intro', checkPresetSearch);
+               reveal('.preset-search-input', helpHtml('intro.buildings.search_tank', {
+                 preset: tankPreset.name()
+               }));
+               context.history().on('change.intro', null);
+             }
+           });
 
-         function drawImproveOSM(selection) {
-           var service = getService();
-           var surface = context.surface();
+           function checkPresetSearch() {
+             var first = context.container().select('.preset-list-item:first-child');
 
-           if (surface && !surface.empty()) {
-             touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
+             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);
+               });
+             }
            }
 
-           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 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 (_layerEnabled$1) {
-             if (service && ~~context.map().zoom() >= minZoom) {
-               editOn();
-               service.loadIssues(projection);
-               updateMarkers();
-             } else {
-               editOff();
-             }
+         function closeEditorTank() {
+           if (!_tankID || !context.hasEntity(_tankID)) {
+             return addTank();
            }
-         } // Toggles the layer on and off
 
+           var ids = context.selectedIDs();
 
-         drawImproveOSM.enabled = function (val) {
-           if (!arguments.length) return _layerEnabled$1;
-           _layerEnabled$1 = val;
+           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _tankID) {
+             context.enter(modeSelect(context, [_tankID]));
+           }
 
-           if (_layerEnabled$1) {
-             layerOn();
-           } else {
-             layerOff();
+           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);
 
-             if (context.selectedErrorID()) {
-               context.enter(modeBrowse(context));
-             }
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             nextStep();
            }
+         }
 
-           dispatch.call('change');
-           return this;
-         };
+         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);
 
-         drawImproveOSM.supported = function () {
-           return !!getService();
-         };
+           function continueTo(nextStep) {
+             context.on('enter.intro', null);
+             context.map().on('move.intro drawn.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
+           }
+         }
 
-         return drawImproveOSM;
-       }
+         function clickCircle() {
+           if (!_tankID) return chapter.restart();
+           var entity = context.hasEntity(_tankID);
+           if (!entity) return continueTo(rightClickTank);
+           var node = selectMenuItem(context, 'circularize').node();
 
-       var _layerEnabled$2 = false;
+           if (!node) {
+             return continueTo(rightClickTank);
+           }
 
-       var _qaService$2;
+           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 svgOsmose(projection, context, dispatch) {
-         var throttledRedraw = throttle(function () {
-           return dispatch.call('change');
-         }, 1000);
+             if (!wasChanged && !node) {
+               return continueTo(rightClickTank);
+             }
 
-         var minZoom = 12;
-         var touchLayer = select(null);
-         var drawLayer = select(null);
-         var layerVisible = false;
+             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 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
+             timeout(function () {
+               if (context.history().undoAnnotation() === _t('operations.circularize.annotation.feature', {
+                 n: 1
+               })) {
+                 continueTo(play);
+               } else {
+                 continueTo(retryClickCircle);
+               }
+             }, 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();
+           }
+         }
 
-         function getService() {
-           if (services.osmose && !_qaService$2) {
-             _qaService$2 = services.osmose;
+         function retryClickCircle() {
+           context.enter(modeBrowse(context));
+           revealTank(tank, helpHtml('intro.buildings.retry_circle'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: function buttonCallback() {
+               continueTo(rightClickTank);
+             }
+           });
 
-             _qaService$2.on('loaded', throttledRedraw);
-           } else if (!services.osmose && _qaService$2) {
-             _qaService$2 = null;
+           function continueTo(nextStep) {
+             nextStep();
            }
+         }
 
-           return _qaService$2;
-         } // Show the markers
+         function play() {
+           dispatch.call('done');
+           reveal('.ideditor', helpHtml('intro.buildings.play', {
+             next: _t('intro.startediting.title')
+           }), {
+             tooltipBox: '.intro-nav-wrap .chapter-startEditing',
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: function buttonCallback() {
+               reveal('.ideditor');
+             }
+           });
+         }
 
+         chapter.enter = function () {
+           addHouse();
+         };
 
-         function editOn() {
-           if (!layerVisible) {
-             layerVisible = true;
-             drawLayer.style('display', 'block');
-           }
-         } // Immediately remove the markers and their touch targets
+         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();
+         };
 
-         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 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 layerOn() {
-           editOn();
-           drawLayer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end interrupt', function () {
-             return dispatch.call('change');
+         function showHelp() {
+           reveal('.map-control.help-control', helpHtml('intro.startediting.help'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: function buttonCallback() {
+               shortcuts();
+             }
            });
-         } // Disable the layer.  This transitions the layer invisible and then hides the markers.
-
+         }
 
-         function layerOff() {
-           throttledRedraw.cancel();
-           drawLayer.interrupt();
-           touchLayer.selectAll('.qaItem.osmose').remove();
-           drawLayer.transition().duration(250).style('opacity', 0).on('end interrupt', function () {
-             editOff();
-             dispatch.call('change');
+         function shortcuts() {
+           reveal('.map-control.help-control', helpHtml('intro.startediting.shortcuts'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: function buttonCallback() {
+               showSave();
+             }
            });
-         } // Update the issue markers
-
+         }
 
-         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..
+         function showSave() {
+           context.container().selectAll('.shaded').remove(); // in case user opened keyboard shortcuts
 
-           var markers = drawLayer.selectAll('.qaItem.osmose').data(data, function (d) {
-             return d.id;
-           }); // exit
+           reveal('.top-toolbar button.save', helpHtml('intro.startediting.save'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: function buttonCallback() {
+               showStart();
+             }
+           });
+         }
 
-           markers.exit().remove(); // enter
+         function showStart() {
+           context.container().selectAll('.shaded').remove(); // in case user opened keyboard shortcuts
 
-           var markersEnter = markers.enter().append('g').attr('class', function (d) {
-             return "qaItem ".concat(d.service, " itemId-").concat(d.id, " itemType-").concat(d.itemType);
+           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();
            });
-           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;
+           startbutton.append('svg').attr('class', 'illustration').append('use').attr('xlink:href', '#iD-logo-walkthrough');
+           startbutton.append('h2').html(_t.html('intro.startediting.start'));
+           dispatch.call('startEditing');
+         }
 
-             if (!picon) {
-               return '';
-             } else {
-               var isMaki = /^maki-/.test(picon);
-               return "#".concat(picon).concat(isMaki ? '-11' : '');
-             }
-           }); // update
+         chapter.enter = function () {
+           showHelp();
+         };
 
-           markers.merge(markersEnter).sort(sortY).classed('selected', function (d) {
-             return d.id === selectedID;
-           }).attr('transform', getTransform); // Draw targets..
+         chapter.exit = function () {
+           modalSelection.remove();
+           context.container().selectAll('.shaded').remove(); // in case user opened keyboard shortcuts
+         };
 
-           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
+         return utilRebind(chapter, dispatch, 'on');
+       }
 
-           targets.exit().remove(); // enter/update
+       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 = {};
 
-           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 _currChapter;
 
-           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 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]));
+               }
+             }
 
+             selection.call(startIntro);
+           })["catch"](function () {
+             /* ignore */
+           });
+         }
 
-         function drawOsmose(selection) {
-           var service = getService();
-           var surface = context.surface();
+         function startIntro(selection) {
+           context.enter(modeBrowse(context)); // Save current map state
 
-           if (surface && !surface.empty()) {
-             touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
-           }
+           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)`)
 
-           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);
+           context.ui().sidebar.expand();
+           context.container().selectAll('button.sidebar-toggle').classed('disabled', true); // Block saving
 
-           if (_layerEnabled$2) {
-             if (service && ~~context.map().zoom() >= minZoom) {
-               editOn();
-               service.loadIssues(projection);
-               updateMarkers();
-             } else {
-               editOff();
-             }
+           context.inIntro(true); // Load semi-real data used in intro
+
+           if (osm) {
+             osm.toggle(false).reset();
            }
-         } // Toggles the layer on and off
 
+           context.history().reset();
+           context.history().merge(Object.values(coreGraph().load(_introGraph).entities));
+           context.history().checkpoint('initial'); // Setup imagery
 
-         drawOsmose.enabled = function (val) {
-           if (!arguments.length) return _layerEnabled$2;
-           _layerEnabled$2 = val;
+           var imagery = context.background().findSource(INTRO_IMAGERY);
 
-           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
-             });
+           if (imagery) {
+             context.background().baseLayerSource(imagery);
            } else {
-             layerOff();
-
-             if (context.selectedErrorID()) {
-               context.enter(modeBrowse(context));
-             }
+             context.background().bing();
            }
 
-           dispatch.call('change');
-           return this;
-         };
-
-         drawOsmose.supported = function () {
-           return !!getService();
-         };
+           overlays.forEach(function (d) {
+             return context.background().toggleOverlayLayer(d);
+           }); // Setup data layers (only OSM)
 
-         return drawOsmose;
-       }
+           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 svgStreetside(projection, context, dispatch) {
-         var throttledRedraw = throttle(function () {
-           dispatch.call('change');
-         }, 1000);
+           corePreferences('walkthrough_started', 'yes'); // Restore previous walkthrough progress..
 
-         var minZoom = 14;
-         var minMarkerZoom = 16;
-         var minViewfieldZoom = 18;
-         var layer = select(null);
-         var _viewerYaw = 0;
-         var _selectedSequence = null;
+           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 _streetside;
-         /**
-          * init().
-          */
+               if (i < chapterFlow.length - 1) {
+                 var next = chapterFlow[i + 1];
+                 context.container().select("button.chapter-".concat(next)).classed('next', true);
+               } // Store walkthrough progress..
 
 
-         function init() {
-           if (svgStreetside.initialized) return; // run once
+               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..
 
-           svgStreetside.enabled = false;
-           svgStreetside.initialized = true;
-         }
-         /**
-          * getService().
-          */
+             var incomplete = utilArrayDifference(chapterFlow, progress);
 
+             if (!incomplete.length) {
+               corePreferences('walkthrough_completed', 'yes');
+             }
 
-         function getService() {
-           if (services.streetside && !_streetside) {
-             _streetside = services.streetside;
+             curtain.remove();
+             navwrap.remove();
+             context.container().selectAll('.main-map .layer-background').style('opacity', opacity);
+             context.container().selectAll('button.sidebar-toggle').classed('disabled', false);
 
-             _streetside.event.on('viewerChanged.svgStreetside', viewerChanged).on('loadedImages.svgStreetside', throttledRedraw);
-           } else if (!services.streetside && _streetside) {
-             _streetside = null;
-           }
+             if (osm) {
+               osm.toggle(true).reset().caches(caches);
+             }
 
-           return _streetside;
-         }
-         /**
-          * showLayer().
-          */
+             context.history().reset().merge(Object.values(baseEntities));
+             context.background().baseLayerSource(background);
+             overlays.forEach(function (d) {
+               return context.background().toggleOverlayLayer(d);
+             });
 
+             if (history) {
+               context.history().fromJSON(history, false);
+             }
 
-         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');
+             context.map().centerZoom(center, zoom);
+             window.location.replace(hash);
+             context.inIntro(false);
            });
-         }
-         /**
-          * hideLayer().
-          */
+           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]);
 
+           function enterChapter(d3_event, newChapter) {
+             if (_currChapter) {
+               _currChapter.exit();
+             }
 
-         function hideLayer() {
-           throttledRedraw.cancel();
-           layer.transition().duration(250).style('opacity', 0).on('end', editOff);
-         }
-         /**
-          * editOn().
-          */
+             context.enter(modeBrowse(context));
+             _currChapter = newChapter;
 
+             _currChapter.enter();
 
-         function editOn() {
-           layer.style('display', 'block');
+             buttons.classed('next', false).classed('active', function (d) {
+               return d.title === _currChapter.title;
+             });
+           }
          }
-         /**
-          * editOff().
-          */
 
+         return intro;
+       }
 
-         function editOff() {
-           layer.selectAll('.viewfield-group').remove();
-           layer.style('display', 'none');
-         }
-         /**
-          * click() Handles 'bubble' point click event.
-          */
+       function uiIssuesInfo(context) {
+         var warningsItem = {
+           id: 'warnings',
+           count: 0,
+           iconID: 'iD-icon-alert',
+           descriptionID: 'issues.warnings_and_errors'
+         };
+         var resolvedItem = {
+           id: 'resolved',
+           count: 0,
+           iconID: 'iD-icon-apply',
+           descriptionID: 'issues.user_resolved_issues'
+         };
 
+         function update(selection) {
+           var shownItems = [];
+           var liveIssues = context.validator().getIssues({
+             what: corePreferences('validate-what') || 'edited',
+             where: corePreferences('validate-where') || 'all'
+           });
 
-         function click(d3_event, d) {
-           var service = getService();
-           if (!service) return; // try to preserve the viewer rotation when staying on the same sequence
+           if (liveIssues.length) {
+             warningsItem.count = liveIssues.length;
+             shownItems.push(warningsItem);
+           }
 
-           if (d.sequenceKey !== _selectedSequence) {
-             _viewerYaw = 0; // reset
+           if (corePreferences('validate-what') === 'all') {
+             var resolvedIssues = context.validator().getResolvedIssues();
+
+             if (resolvedIssues.length) {
+               resolvedItem.count = resolvedIssues.length;
+               shownItems.push(resolvedItem);
+             }
            }
 
-           _selectedSequence = d.sequenceKey;
-           service.ensureViewerLoaded(context).then(function () {
-             service.selectImage(context, d.key).yaw(_viewerYaw).showViewer(context);
+           var chips = selection.selectAll('.chip').data(shownItems, function (d) {
+             return d.id;
            });
-           context.map().centerEase(d.loc);
-         }
-         /**
-          * mouseover().
-          */
-
+           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
 
-         function mouseover(d3_event, d) {
-           var service = getService();
-           if (service) service.setStyles(context, d);
+               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();
+           });
          }
-         /**
-          * mouseout().
-          */
 
+         return function (selection) {
+           update(selection);
+           context.validator().on('validated.infobox', function () {
+             update(selection);
+           });
+         };
+       }
 
-         function mouseout() {
-           var service = getService();
-           if (service) service.setStyles(context, null);
-         }
-         /**
-          * transform().
-          */
+       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)
 
+           var _dMini; // dimensions of minimap
 
-         function transform(d) {
-           var t = svgPointTransform(projection)(d);
-           var rot = d.ca + _viewerYaw;
 
-           if (rot) {
-             t += ' rotate(' + Math.floor(rot) + ',0,0)';
-           }
+           var _cMini; // center pixel of minimap
 
-           return t;
-         }
 
-         function viewerChanged() {
-           var service = getService();
-           if (!service) return;
-           var viewer = service.viewer();
-           if (!viewer) return; // update viewfield rotation
+           var _tStart; // transform at start of gesture
 
-           _viewerYaw = viewer.getYaw(); // avoid updating if the map is currently transformed
-           // e.g. during drags or easing.
 
-           if (context.map().isTransformed()) return;
-           layer.selectAll('.viewfield-group.currentView').attr('transform', transform);
-         }
+           var _tCurr; // transform at most recent event
 
-         function filterBubbles(bubbles) {
-           var fromDate = context.photos().fromDate();
-           var toDate = context.photos().toDate();
-           var usernames = context.photos().usernames();
 
-           if (fromDate) {
-             var fromTimestamp = new Date(fromDate).getTime();
-             bubbles = bubbles.filter(function (bubble) {
-               return new Date(bubble.captured_at).getTime() >= fromTimestamp;
-             });
-           }
+           var _timeoutID;
 
-           if (toDate) {
-             var toTimestamp = new Date(toDate).getTime();
-             bubbles = bubbles.filter(function (bubble) {
-               return new Date(bubble.captured_at).getTime() <= toTimestamp;
-             });
+           function zoomStarted() {
+             if (_skipEvents) return;
+             _tStart = _tCurr = projection.transform();
+             _gesture = null;
            }
 
-           if (usernames) {
-             bubbles = bubbles.filter(function (bubble) {
-               return usernames.indexOf(bubble.captured_by) !== -1;
-             });
-           }
+           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;
 
-           return bubbles;
-         }
+             if (!isZooming && !isPanning) {
+               return; // no change
+             } // lock in either zooming or panning, don't allow both in minimap.
 
-         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;
-             });
-           }
+             if (!_gesture) {
+               _gesture = isZooming ? 'zoom' : 'pan';
+             }
 
-           if (toDate) {
-             var toTimestamp = new Date(toDate).getTime();
-             sequences = sequences.filter(function (sequences) {
-               return new Date(sequences.properties.captured_at).getTime() <= toTimestamp;
-             });
-           }
+             var tMini = projection.transform();
+             var tX, tY, scale;
 
-           if (usernames) {
-             sequences = sequences.filter(function (sequences) {
-               return usernames.indexOf(sequences.properties.captured_by) !== -1;
-             });
+             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;
+             }
+
+             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();
            }
 
-           return sequences;
-         }
-         /**
-          * update().
-          */
+           function zoomEnded() {
+             if (_skipEvents) return;
+             if (_gesture !== 'pan') return;
+             updateProjection();
+             _gesture = null;
+             context.map().center(projection.invert(_cMini)); // recenter main map..
+           }
 
+           function updateProjection() {
+             var loc = context.map().center();
+             var tMain = context.projection.transform();
+             var zMain = geoScaleToZoom(tMain.k);
+             var zMini = Math.max(zMain - _zDiff, 0.5);
+             var kMini = geoZoomToScale(zMini);
+             projection.translate([tMain.x, tMain.y]).scale(kMini);
+             var point = projection(loc);
+             var mouse = _gesture === 'pan' ? geoVecSubtract([_tCurr.x, _tCurr.y], [_tStart.x, _tStart.y]) : [0, 0];
+             var xMini = _cMini[0] - point[0] + tMain.x + mouse[0];
+             var yMini = _cMini[1] - point[1] + tMain.y + mouse[1];
+             projection.translate([xMini, yMini]).clipExtent([[0, 0], _dMini]);
+             _tCurr = projection.transform();
 
-         function update() {
-           var viewer = context.container().select('.photoviewer');
-           var selected = viewer.empty() ? undefined : viewer.datum();
-           var z = ~~context.map().zoom();
-           var showMarkers = z >= minMarkerZoom;
-           var showViewfields = z >= minViewfieldZoom;
-           var service = getService();
-           var sequences = [];
-           var bubbles = [];
+             if (_isTransformed) {
+               utilSetTransform(tiles, 0, 0);
+               utilSetTransform(viewport, 0, 0);
+               _isTransformed = false;
+             }
 
-           if (context.photos().showsPanoramic()) {
-             sequences = service ? service.sequences(projection) : [];
-             bubbles = service && showMarkers ? service.bubbles(projection) : [];
-             sequences = filterSequences(sequences);
-             bubbles = filterBubbles(bubbles);
+             zoom.scaleExtent([geoZoomToScale(0.5), geoZoomToScale(zMain - 3)]);
+             _skipEvents = true;
+             wrap.call(zoom.transform, _tCurr);
+             _skipEvents = false;
            }
 
-           var traces = layer.selectAll('.sequences').selectAll('.sequence').data(sequences, function (d) {
-             return d.properties.key;
-           }); // exit
+           function redraw() {
+             clearTimeout(_timeoutID);
+             if (_isHidden) return;
+             updateProjection();
+             var zMini = geoScaleToZoom(projection.scale()); // setup tile container
 
-           traces.exit().remove(); // enter/update
+             tiles = wrap.selectAll('.map-in-map-tiles').data([0]);
+             tiles = tiles.enter().append('div').attr('class', 'map-in-map-tiles').merge(tiles); // redraw background
 
-           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
+             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
 
-           groups.exit().remove(); // enter
+             var overlaySources = context.background().overlayLayerSources();
+             var activeOverlayLayers = [];
 
-           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
+             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
 
-           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 (_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;
+               });
+             }
+           }
 
-           viewfields.enter().insert('path', 'circle').attr('class', 'viewfield').attr('transform', 'scale(1.5,1.5),translate(-8, -13)').attr('d', viewfieldPath);
+           function queueRedraw() {
+             clearTimeout(_timeoutID);
+             _timeoutID = setTimeout(function () {
+               redraw();
+             }, 750);
+           }
 
-           function viewfieldPath() {
-             var d = this.parentNode.__data__;
+           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 (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';
+             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 {
-               return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
+               wrap.style('display', 'block').style('opacity', '0').transition().duration(200).style('opacity', '1').on('end', function () {
+                 redraw();
+               });
              }
            }
-         }
-         /**
-          * drawImages()
-          * drawImages is the method that is returned (and that runs) every time 'svgStreetside()' is called.
-          * 'svgStreetside()' is called from index.js
-          */
 
+           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 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);
+           _dMini = [200, 150]; //utilGetDimensions(wrap);
 
-           if (enabled) {
-             if (service && ~~context.map().zoom() >= minZoom) {
-               editOn();
-               update();
-               service.loadBubbles(projection);
-             } else {
-               editOff();
+           _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);
          }
-         /**
-          * drawImages.enabled().
-          */
 
+         return mapInMap;
+       }
 
-         drawImages.enabled = function (_) {
-           if (!arguments.length) return svgStreetside.enabled;
-           svgStreetside.enabled = _;
+       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'));
 
-           if (svgStreetside.enabled) {
-             showLayer();
-             context.photos().on('change.streetside', update);
-           } else {
-             hideLayer();
-             context.photos().on('change.streetside', null);
+           function disableTooHigh() {
+             var canEdit = context.map().zoom() >= context.minEditableZoom();
+             div.style('display', canEdit ? 'none' : 'block');
            }
 
-           dispatch.call('change');
-           return this;
+           context.map().on('move.notice', debounce(disableTooHigh, 500));
+           disableTooHigh();
          };
-         /**
-          * drawImages.supported().
-          */
+       }
 
+       function uiPhotoviewer(context) {
+         var dispatch = dispatch$8('resize');
 
-         drawImages.supported = function () {
-           return !!getService();
-         };
+         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-         init();
-         return drawImages;
-       }
+         function photoviewer(selection) {
+           selection.append('button').attr('class', 'thumb-hide').on('click', function () {
+             if (services.streetside) {
+               services.streetside.hideViewer(context);
+             }
 
-       function svgMapillaryImages(projection, context, dispatch) {
-         var throttledRedraw = throttle(function () {
-           dispatch.call('change');
-         }, 1000);
+             if (services.mapillary) {
+               services.mapillary.hideViewer(context);
+             }
 
-         var minZoom = 12;
-         var minMarkerZoom = 16;
-         var minViewfieldZoom = 18;
-         var layer = select(null);
+             if (services.openstreetcam) {
+               services.openstreetcam.hideViewer(context);
+             }
+           }).append('div').call(svgIcon('#iD-icon-close'));
 
-         var _mapillary;
+           function preventDefault(d3_event) {
+             d3_event.preventDefault();
+           }
 
-         var viewerCompassAngle;
+           selection.append('button').attr('class', 'resize-handle-xy').on('touchstart touchdown touchend', preventDefault).on(_pointerPrefix + 'down', buildResizeListener(selection, 'resize', dispatch, {
+             resizeOnX: true,
+             resizeOnY: true
+           }));
+           selection.append('button').attr('class', 'resize-handle-x').on('touchstart touchdown touchend', preventDefault).on(_pointerPrefix + 'down', buildResizeListener(selection, 'resize', dispatch, {
+             resizeOnX: true
+           }));
+           selection.append('button').attr('class', 'resize-handle-y').on('touchstart touchdown touchend', preventDefault).on(_pointerPrefix + 'down', buildResizeListener(selection, 'resize', dispatch, {
+             resizeOnY: true
+           }));
 
-         function init() {
-           if (svgMapillaryImages.initialized) return; // run once
+           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;
 
-           svgMapillaryImages.enabled = false;
-           svgMapillaryImages.initialized = true;
-         }
+             function startResize(d3_event) {
+               if (pointerId !== (d3_event.pointerId || 'mouse')) return;
+               d3_event.preventDefault();
+               d3_event.stopPropagation();
+               var mapSize = context.map().dimensions();
 
-         function getService() {
-           if (services.mapillary && !_mapillary) {
-             _mapillary = services.mapillary;
+               if (resizeOnX) {
+                 var maxWidth = mapSize[0];
+                 var newWidth = clamp(startWidth + d3_event.clientX - startX, minWidth, maxWidth);
+                 target.style('width', newWidth + 'px');
+               }
 
-             _mapillary.event.on('loadedImages', throttledRedraw);
-           } else if (!services.mapillary && _mapillary) {
-             _mapillary = null;
-           }
+               if (resizeOnY) {
+                 var maxHeight = mapSize[1] - 90; // preserve space at top/bottom of map
 
-           return _mapillary;
-         }
+                 var newHeight = clamp(startHeight + startY - d3_event.clientY, minHeight, maxHeight);
+                 target.style('height', newHeight + 'px');
+               }
 
-         function showLayer() {
-           var service = getService();
-           if (!service) return;
-           editOn();
-           layer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end', function () {
-             dispatch.call('change');
-           });
-         }
+               dispatch.call(eventName, target, utilGetDimensions(target, true));
+             }
 
-         function hideLayer() {
-           throttledRedraw.cancel();
-           layer.transition().duration(250).style('opacity', 0).on('end', editOff);
-         }
+             function clamp(num, min, max) {
+               return Math.max(min, Math.min(num, max));
+             }
 
-         function editOn() {
-           layer.style('display', 'block');
-         }
+             function stopResize(d3_event) {
+               if (pointerId !== (d3_event.pointerId || 'mouse')) return;
+               d3_event.preventDefault();
+               d3_event.stopPropagation(); // remove all the listeners we added
 
-         function editOff() {
-           layer.selectAll('.viewfield-group').remove();
-           layer.style('display', 'none');
-         }
+               select(window).on('.' + eventName, 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);
-         }
+             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 mouseover(d) {
-           var service = getService();
-           if (service) service.setStyles(context, d);
+               if (_pointerPrefix === 'pointer') {
+                 select(window).on('pointercancel.' + eventName, stopResize, false);
+               }
+             };
+           }
          }
 
-         function mouseout() {
-           var service = getService();
-           if (service) service.setStyles(context, null);
-         }
+         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 transform(d) {
-           var t = svgPointTransform(projection)(d);
+           var photoDimensions = utilGetDimensions(photoviewer, true);
 
-           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)';
+           if (photoDimensions[0] > mapDimensions[0] || photoDimensions[1] > mapDimensions[1] - 90) {
+             var setPhotoDimensions = [Math.min(photoDimensions[0], mapDimensions[0]), Math.min(photoDimensions[1], mapDimensions[1] - 90)];
+             photoviewer.style('width', setPhotoDimensions[0] + 'px').style('height', setPhotoDimensions[1] + 'px');
+             dispatch.call('resize', photoviewer, setPhotoDimensions);
            }
+         };
 
-           return t;
-         }
+         return utilRebind(photoviewer, dispatch, 'on');
+       }
 
-         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();
+       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();
+         };
+       }
 
-           if (!showsPano || !showsFlat) {
-             images = images.filter(function (image) {
-               if (image.pano) return showsPano;
-               return showsFlat;
-             });
-           }
+       function uiScale(context) {
+         var projection = context.projection,
+             isImperial = !_mainLocalizer.usesMetric(),
+             maxLength = 180,
+             tickHeight = 8;
 
-           if (fromDate) {
-             var fromTimestamp = new Date(fromDate).getTime();
-             images = images.filter(function (image) {
-               return new Date(image.captured_at).getTime() >= fromTimestamp;
-             });
-           }
+         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;
 
-           if (toDate) {
-             var toTimestamp = new Date(toDate).getTime();
-             images = images.filter(function (image) {
-               return new Date(image.captured_at).getTime() <= toTimestamp;
-             });
-           }
+           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
 
-           if (usernames) {
-             images = images.filter(function (image) {
-               return usernames.indexOf(image.captured_by) !== -1;
-             });
+
+           for (i = 0; i < buckets.length; i++) {
+             val = buckets[i];
+
+             if (dist >= val) {
+               scale.dist = Math.floor(dist / val) * val;
+               break;
+             } else {
+               scale.dist = +dist.toFixed(2);
+             }
            }
 
-           return images;
+           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 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();
+         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);
+         }
 
-           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;
+         return function (selection) {
+           function switchUnits() {
+             isImperial = !isImperial;
+             selection.call(update);
+           }
 
-                 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);
+           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);
+           });
+         };
+       }
 
-                     if (image && image.hasOwnProperty('pano')) {
-                       if (image.pano) return showsPano;
-                       return showsFlat;
-                     }
-                   }
-                 }
-               }
+       function uiShortcuts(context) {
+         var detected = utilDetect();
+         var _activeTab = 0;
 
-               return false;
-             });
-           }
+         var _modalSelection;
 
-           if (fromDate) {
-             var fromTimestamp = new Date(fromDate).getTime();
-             sequences = sequences.filter(function (sequence) {
-               return new Date(sequence.properties.captured_at).getTime() >= fromTimestamp;
-             });
-           }
+         var _selection = select(null);
 
-           if (toDate) {
-             var toTimestamp = new Date(toDate).getTime();
-             sequences = sequences.filter(function (sequence) {
-               return new Date(sequence.properties.captured_at).getTime() <= toTimestamp;
-             });
-           }
+         var _dataShortcuts;
 
-           if (usernames) {
-             sequences = sequences.filter(function (sequence) {
-               return usernames.indexOf(sequence.properties.username) !== -1;
-             });
-           }
+         function shortcutsModal(_modalSelection) {
+           _modalSelection.select('.modal').classed('modal-shortcuts', true);
 
-           return sequences;
+           var content = _modalSelection.select('.content');
+
+           content.append('div').attr('class', 'modal-section').append('h3').html(_t.html('shortcuts.title'));
+           _mainFileFetcher.get('shortcuts').then(function (data) {
+             _dataShortcuts = data;
+             content.call(render);
+           })["catch"](function () {
+             /* ignore */
+           });
          }
 
-         function 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
+         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();
 
-           traces.exit().remove(); // enter/update
+             var i = _dataShortcuts.indexOf(d);
 
-           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
+             _activeTab = i;
+             render(selection);
+           });
+           tabsEnter.append('span').html(function (d) {
+             return _t.html(d.text);
+           }); // Update
 
-           groups.exit().remove(); // enter
+           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;
 
-           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 (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
 
-           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 viewfieldPath() {
-             var d = this.parentNode.__data__;
+             arr = arr.map(function (s) {
+               return uiCmd.display(s.indexOf('.') !== -1 ? _t(s) : s);
+             });
+             return utilArrayUniq(arr).map(function (s) {
+               return {
+                 shortcut: s,
+                 separator: d.separator,
+                 suffix: d.suffix
+               };
+             });
+           }).enter().each(function (d, i, nodes) {
+             var selection = select(this);
+             var click = d.shortcut.toLowerCase().match(/(.*).click/);
 
-             if (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';
+             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 {
-               return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
+               selection.append('kbd').attr('class', 'shortcut').html(function (d) {
+                 return d.shortcut;
+               });
              }
-           }
-         }
-
-         function drawImages(selection) {
-           var enabled = svgMapillaryImages.enabled;
-           var service = getService();
-           layer = selection.selectAll('.layer-mapillary').data(service ? [0] : []);
-           layer.exit().remove();
-           var layerEnter = layer.enter().append('g').attr('class', 'layer-mapillary').style('display', enabled ? 'block' : 'none');
-           layerEnter.append('g').attr('class', 'sequences');
-           layerEnter.append('g').attr('class', 'markers');
-           layer = layerEnter.merge(layer);
 
-           if (enabled) {
-             if (service && ~~context.map().zoom() >= minZoom) {
-               editOn();
-               update();
-               service.loadImages(projection);
-             } else {
-               editOff();
+             if (i < nodes.length - 1) {
+               selection.append('span').html(d.separator || "\xA0" + _t.html('shortcuts.or') + "\xA0");
+             } else if (i === nodes.length - 1 && d.suffix) {
+               selection.append('span').html(d.suffix);
              }
-           }
+           });
+           shortcutKeys.filter(function (d) {
+             return d.gesture;
+           }).each(function () {
+             var selection = select(this);
+             selection.append('span').html('+');
+             selection.append('span').attr('class', 'gesture').html(function (d) {
+               return _t.html(d.gesture);
+             });
+           });
+           shortcutRows.append('td').attr('class', 'shortcut-desc').html(function (d) {
+             return d.text ? _t.html(d.text) : "\xA0";
+           }); // Update
+
+           wrapper.selectAll('.shortcut-tab').style('display', function (d, i) {
+             return i === _activeTab ? 'flex' : 'none';
+           });
          }
 
-         drawImages.enabled = function (_) {
-           if (!arguments.length) return svgMapillaryImages.enabled;
-           svgMapillaryImages.enabled = _;
+         return function (selection, show) {
+           _selection = selection;
 
-           if (svgMapillaryImages.enabled) {
-             showLayer();
-             context.photos().on('change.mapillary_images', update);
+           if (show) {
+             _modalSelection = uiModal(selection);
+
+             _modalSelection.call(shortcutsModal);
            } else {
-             hideLayer();
-             context.photos().on('change.mapillary_images', null);
-           }
+             context.keybinding().on([_t('shortcuts.toggle.key'), '?'], function () {
+               if (context.container().selectAll('.modal-shortcuts').size()) {
+                 // already showing
+                 if (_modalSelection) {
+                   _modalSelection.close();
 
-           dispatch.call('change');
-           return this;
+                   _modalSelection = null;
+                 }
+               } else {
+                 _modalSelection = uiModal(_selection);
+
+                 _modalSelection.call(shortcutsModal);
+               }
+             });
+           }
          };
+       }
 
-         drawImages.supported = function () {
-           return !!getService();
+       function uiDataHeader() {
+         var _datum;
+
+         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'));
+         }
+
+         dataHeader.datum = function (val) {
+           if (!arguments.length) return _datum;
+           _datum = val;
+           return this;
          };
 
-         init();
-         return drawImages;
+         return dataHeader;
        }
 
-       function svgMapillaryPosition(projection, context) {
-         var throttledRedraw = throttle(function () {
-           update();
-         }, 1000);
+       // 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
+       //   }, ...]
 
-         var minZoom = 12;
-         var minViewfieldZoom = 18;
-         var layer = select(null);
+       var _comboHideTimerID;
 
-         var _mapillary;
+       function uiCombobox(context, klass) {
+         var dispatch = dispatch$8('accept', 'cancel');
+         var container = context.container();
+         var _suggestions = [];
+         var _data = [];
+         var _fetched = {};
+         var _selected = null;
+         var _canAutocomplete = true;
+         var _caseSensitive = false;
+         var _cancelFetch = false;
+         var _minItems = 2;
+         var _tDown = 0;
 
-         var viewerCompassAngle;
+         var _mouseEnterHandler, _mouseLeaveHandler;
 
-         function init() {
-           if (svgMapillaryPosition.initialized) return; // run once
+         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;
+             });
+           }));
+         };
 
-           svgMapillaryPosition.initialized = 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 getService() {
-           if (services.mapillary && !_mapillary) {
-             _mapillary = services.mapillary;
+               input.node().focus(); // focus the input as if it was clicked
 
-             _mapillary.event.on('nodeChanged', throttledRedraw);
+               mousedown(d3_event);
+             }).on('mouseup.combo-caret', function (d3_event) {
+               d3_event.preventDefault(); // don't steal focus from input
 
-             _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);
+               mouseup(d3_event);
              });
-           } else if (!services.mapillary && _mapillary) {
-             _mapillary = null;
-           }
+           });
 
-           return _mapillary;
-         }
+           function mousedown(d3_event) {
+             if (d3_event.button !== 0) return; // left click only
 
-         function editOn() {
-           layer.style('display', 'block');
-         }
+             _tDown = +new Date(); // clear selection
 
-         function editOff() {
-           layer.selectAll('.viewfield-group').remove();
-           layer.style('display', 'none');
-         }
+             var start = input.property('selectionStart');
+             var end = input.property('selectionEnd');
 
-         function transform(d) {
-           var t = svgPointTransform(projection)(d);
+             if (start !== end) {
+               var val = utilGetSetValue(input);
+               input.node().setSelectionRange(val.length, val.length);
+               return;
+             }
 
-           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)';
+             input.on('mouseup.combo-input', mouseup);
            }
 
-           return t;
-         }
-
-         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 mouseup(d3_event) {
+             input.on('mouseup.combo-input', null);
+             if (d3_event.button !== 0) return; // left click only
 
-           groups.exit().remove(); // enter
+             if (input.node() !== document.activeElement) return; // exit if this input is not focused
 
-           var groupsEnter = groups.enter().append('g').attr('class', 'viewfield-group currentView highlighted');
-           groupsEnter.append('g').attr('class', 'viewfield-scale'); // update
+             var start = input.property('selectionStart');
+             var end = input.property('selectionEnd');
+             if (start !== end) return; // exit if user is selecting
+             // not showing or showing for a different field - try to show it.
 
-           var 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);
+             var combo = container.selectAll('.combobox');
 
-           function viewfieldPath() {
-             var d = this.parentNode.__data__;
+             if (combo.empty() || combo.datum() !== input.node()) {
+               var tOrig = _tDown;
+               window.setTimeout(function () {
+                 if (tOrig !== _tDown) return; // exit if user double clicked
 
-             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';
+                 fetchComboData('', function () {
+                   show();
+                   render();
+                 });
+               }, 250);
              } 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';
+               hide();
              }
            }
-         }
-
-         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 focus() {
+             fetchComboData(''); // prefetch values (may warm taginfo cache)
            }
-         }
-
-         drawImages.enabled = function () {
-           update();
-           return this;
-         };
-
-         drawImages.supported = function () {
-           return !!getService();
-         };
-
-         init();
-         return drawImages;
-       }
-
-       function svgMapillarySigns(projection, context, dispatch) {
-         var throttledRedraw = throttle(function () {
-           dispatch.call('change');
-         }, 1000);
-
-         var minZoom = 12;
-         var layer = select(null);
-
-         var _mapillary;
-
-         function init() {
-           if (svgMapillarySigns.initialized) return; // run once
-
-           svgMapillarySigns.enabled = false;
-           svgMapillarySigns.initialized = true;
-         }
-
-         function getService() {
-           if (services.mapillary && !_mapillary) {
-             _mapillary = services.mapillary;
 
-             _mapillary.event.on('loadedSigns', throttledRedraw);
-           } else if (!services.mapillary && _mapillary) {
-             _mapillary = null;
+           function blur() {
+             _comboHideTimerID = window.setTimeout(hide, 75);
            }
 
-           return _mapillary;
-         }
-
-         function showLayer() {
-           var service = getService();
-           if (!service) return;
-           service.loadSignResources(context);
-           editOn();
-         }
-
-         function hideLayer() {
-           throttledRedraw.cancel();
-           editOff();
-         }
-
-         function editOn() {
-           layer.style('display', 'block');
-         }
-
-         function editOff() {
-           layer.selectAll('.icon-sign').remove();
-           layer.style('display', 'none');
-         }
-
-         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.
-
-           d.detections.forEach(function (detection) {
-             if (!imageKey || selectedImageKey === detection.image_key) {
-               imageKey = detection.image_key;
-               highlightedDetection = detection;
-             }
-           });
+           function show() {
+             hide(); // remove any existing
 
-           if (imageKey === selectedImageKey) {
-             service.highlightDetection(highlightedDetection).selectImage(context, imageKey);
-           } else {
-             service.ensureViewerLoaded(context).then(function () {
-               service.highlightDetection(highlightedDetection).selectImage(context, imageKey).showViewer(context);
+             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 filterData(detectedFeatures) {
-           var service = getService();
-           var fromDate = context.photos().fromDate();
-           var toDate = context.photos().toDate();
-           var usernames = context.photos().usernames();
+           function hide() {
+             if (_comboHideTimerID) {
+               window.clearTimeout(_comboHideTimerID);
+               _comboHideTimerID = undefined;
+             }
 
-           if (fromDate) {
-             var fromTimestamp = new Date(fromDate).getTime();
-             detectedFeatures = detectedFeatures.filter(function (feature) {
-               return new Date(feature.last_seen_at).getTime() >= fromTimestamp;
-             });
+             container.selectAll('.combobox').remove();
+             container.on('scroll.combo-scroll', null);
            }
 
-           if (toDate) {
-             var toTimestamp = new Date(toDate).getTime();
-             detectedFeatures = detectedFeatures.filter(function (feature) {
-               return new Date(feature.first_seen_at).getTime() <= toTimestamp;
-             });
-           }
+           function keydown(d3_event) {
+             var shown = !container.selectAll('.combobox').empty();
+             var tagName = input.node() ? input.node().tagName.toLowerCase() : '';
 
-           if (usernames && service) {
-             detectedFeatures = detectedFeatures.filter(function (feature) {
-               return feature.detections.some(function (detection) {
-                 var imageKey = detection.image_key;
-                 var image = service.cachedImage(imageKey);
-                 return image && usernames.indexOf(image.captured_by) !== -1;
-               });
-             });
-           }
+             switch (d3_event.keyCode) {
+               case 8: // ⌫ Backspace
 
-           return detectedFeatures;
-         }
+               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;
 
-         function update() {
-           var service = getService();
-           var data = service ? service.signs(projection) : [];
-           data = filterData(data);
-           var selectedImageKey = service.getSelectedImageKey();
-           var transform = svgPointTransform(projection);
-           var signs = layer.selectAll('.icon-sign').data(data, function (d) {
-             return d.key;
-           }); // exit
+               case 9:
+                 // ⇥ Tab
+                 accept();
+                 break;
 
-           signs.exit().remove(); // enter
+               case 13:
+                 // ↩ Return
+                 d3_event.preventDefault();
+                 d3_event.stopPropagation();
+                 break;
 
-           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
+               case 38:
+                 // ↑ Up arrow
+                 if (tagName === 'textarea' && !shown) return;
+                 d3_event.preventDefault();
 
-           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 (tagName === 'input' && !shown) {
+                   show();
+                 }
 
-             if (aSelected === bSelected) {
-               return b.loc[1] - a.loc[1]; // sort Y
-             } else if (aSelected) {
-               return 1;
-             }
+                 nav(-1);
+                 break;
 
-             return -1;
-           });
-         }
+               case 40:
+                 // ↓ Down arrow
+                 if (tagName === 'textarea' && !shown) return;
+                 d3_event.preventDefault();
 
-         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 (tagName === 'input' && !shown) {
+                   show();
+                 }
 
-           if (enabled) {
-             if (service && ~~context.map().zoom() >= minZoom) {
-               editOn();
-               update();
-               service.loadSigns(projection);
-               service.showSignDetections(true);
-             } else {
-               editOff();
+                 nav(+1);
+                 break;
              }
-           } else if (service) {
-             service.showSignDetections(false);
            }
-         }
 
-         drawSigns.enabled = function (_) {
-           if (!arguments.length) return svgMapillarySigns.enabled;
-           svgMapillarySigns.enabled = _;
+           function keyup(d3_event) {
+             switch (d3_event.keyCode) {
+               case 27:
+                 // ⎋ Escape
+                 cancel();
+                 break;
 
-           if (svgMapillarySigns.enabled) {
-             showLayer();
-             context.photos().on('change.mapillary_signs', update);
-           } else {
-             hideLayer();
-             context.photos().on('change.mapillary_signs', null);
-           }
+               case 13:
+                 // ↩ Return
+                 accept();
+                 break;
+             }
+           } // Called whenever the input value is changed (e.g. on typing)
+
+
+           function change() {
+             fetchComboData(value(), function () {
+               _selected = null;
+               var val = input.property('value');
 
-           dispatch.call('change');
-           return this;
-         };
+               if (_suggestions.length) {
+                 if (input.property('selectionEnd') === val.length) {
+                   _selected = tryAutocomplete();
+                 }
 
-         drawSigns.supported = function () {
-           return !!getService();
-         };
+                 if (!_selected) {
+                   _selected = val;
+                 }
+               }
 
-         init();
-         return drawSigns;
-       }
+               if (val.length) {
+                 var combo = container.selectAll('.combobox');
 
-       function svgMapillaryMapFeatures(projection, context, dispatch) {
-         var throttledRedraw = throttle(function () {
-           dispatch.call('change');
-         }, 1000);
+                 if (combo.empty()) {
+                   show();
+                 }
+               } else {
+                 hide();
+               }
 
-         var minZoom = 12;
-         var layer = select(null);
+               render();
+             });
+           } // Called when the user presses up/down arrows to navigate the list
 
-         var _mapillary;
 
-         function init() {
-           if (svgMapillaryMapFeatures.initialized) return; // run once
+           function nav(dir) {
+             if (_suggestions.length) {
+               // try to determine previously selected index..
+               var index = -1;
 
-           svgMapillaryMapFeatures.enabled = false;
-           svgMapillaryMapFeatures.initialized = true;
-         }
+               for (var i = 0; i < _suggestions.length; i++) {
+                 if (_selected && _suggestions[i].value === _selected) {
+                   index = i;
+                   break;
+                 }
+               } // pick new _selected
 
-         function getService() {
-           if (services.mapillary && !_mapillary) {
-             _mapillary = services.mapillary;
 
-             _mapillary.event.on('loadedMapFeatures', throttledRedraw);
-           } else if (!services.mapillary && _mapillary) {
-             _mapillary = null;
+               index = Math.max(Math.min(index + dir, _suggestions.length - 1), 0);
+               _selected = _suggestions[index].value;
+               input.property('value', _selected);
+             }
+
+             render();
+             ensureVisible();
            }
 
-           return _mapillary;
-         }
+           function ensureVisible() {
+             var combo = container.selectAll('.combobox');
+             if (combo.empty()) return;
+             var containerRect = container.node().getBoundingClientRect();
+             var comboRect = combo.node().getBoundingClientRect();
 
-         function showLayer() {
-           var service = getService();
-           if (!service) return;
-           service.loadObjectResources(context);
-           editOn();
-         }
+             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 hideLayer() {
-           throttledRedraw.cancel();
-           editOff();
-         }
 
-         function editOn() {
-           layer.style('display', 'block');
-         }
+             var selected = combo.selectAll('.combobox-option.selected').node();
 
-         function editOff() {
-           layer.selectAll('.icon-map-feature').remove();
-           layer.style('display', 'none');
-         }
+             if (selected) {
+               selected.scrollIntoView({
+                 behavior: 'smooth',
+                 block: 'nearest'
+               });
+             }
+           }
 
-         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 value() {
+             var value = input.property('value');
+             var start = input.property('selectionStart');
+             var end = input.property('selectionEnd');
 
-           d.detections.forEach(function (detection) {
-             if (!imageKey || selectedImageKey === detection.image_key) {
-               imageKey = detection.image_key;
-               highlightedDetection = detection;
+             if (start && end) {
+               value = value.substring(0, start);
              }
-           });
 
-           if (imageKey === selectedImageKey) {
-             service.highlightDetection(highlightedDetection).selectImage(context, imageKey);
-           } else {
-             service.ensureViewerLoaded(context).then(function () {
-               service.highlightDetection(highlightedDetection).selectImage(context, imageKey).showViewer(context);
-             });
+             return value;
            }
-         }
 
-         function filterData(detectedFeatures) {
-           var service = getService();
-           var fromDate = context.photos().fromDate();
-           var toDate = context.photos().toDate();
-           var usernames = context.photos().usernames();
+           function fetchComboData(v, cb) {
+             _cancelFetch = false;
 
-           if (fromDate) {
-             var fromTimestamp = new Date(fromDate).getTime();
-             detectedFeatures = detectedFeatures.filter(function (feature) {
-               return new Date(feature.last_seen_at).getTime() >= fromTimestamp;
-             });
-           }
+             _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;
+               });
 
-           if (toDate) {
-             var toTimestamp = new Date(toDate).getTime();
-             detectedFeatures = detectedFeatures.filter(function (feature) {
-               return new Date(feature.first_seen_at).getTime() <= toTimestamp;
+               if (cb) {
+                 cb();
+               }
              });
            }
 
-           if (usernames && service) {
-             detectedFeatures = detectedFeatures.filter(function (feature) {
-               return feature.detections.some(function (detection) {
-                 var imageKey = detection.image_key;
-                 var image = service.cachedImage(imageKey);
-                 return image && usernames.indexOf(image.captured_by) !== -1;
-               });
-             });
-           }
+           function tryAutocomplete() {
+             if (!_canAutocomplete) return;
+             var val = _caseSensitive ? value() : value().toLowerCase();
+             if (!val) return; // Don't autocomplete if user is typing a number - #4935
 
-           return detectedFeatures;
-         }
+             if (!isNaN(parseFloat(val)) && isFinite(val)) return;
+             var bestIndex = -1;
 
-         function update() {
-           var service = getService();
-           var data = service ? service.mapFeatures(projection) : [];
-           data = filterData(data);
-           var selectedImageKey = service && service.getSelectedImageKey();
-           var transform = svgPointTransform(projection);
-           var mapFeatures = layer.selectAll('.icon-map-feature').data(data, function (d) {
-             return d.key;
-           }); // exit
+             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..
 
-           mapFeatures.exit().remove(); // enter
+               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;
+               }
+             }
 
-           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 (bestIndex !== -1) {
+               var bestVal = _suggestions[bestIndex].value;
+               input.property('value', bestVal);
+               input.node().setSelectionRange(val.length, bestVal.length);
+               return bestVal;
              }
+           }
 
-             return '#' + d.value;
-           });
-           enter.append('rect').attr('width', '24px').attr('height', '24px').attr('x', '-12px').attr('y', '-12px'); // update
+           function render() {
+             if (_suggestions.length < _minItems || document.activeElement !== input.node()) {
+               hide();
+               return;
+             }
 
-           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;
+             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
 
-             if (aSelected === bSelected) {
-               return b.loc[1] - a.loc[1]; // sort Y
-             } else if (aSelected) {
-               return 1;
-             }
-
-             return -1;
-           });
-         }
+             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 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);
-           }
-         }
+           function accept(d3_event, d) {
+             _cancelFetch = true;
+             var thiz = input.node();
 
-         drawMapFeatures.enabled = function (_) {
-           if (!arguments.length) return svgMapillaryMapFeatures.enabled;
-           svgMapillaryMapFeatures.enabled = _;
+             if (d) {
+               // user clicked on a suggestion
+               utilGetSetValue(input, d.value); // replace field contents
 
-           if (svgMapillaryMapFeatures.enabled) {
-             showLayer();
-             context.photos().on('change.mapillary_map_features', update);
-           } else {
-             hideLayer();
-             context.photos().on('change.mapillary_map_features', null);
-           }
+               utilTriggerEvent(input, 'change');
+             } // clear (and keep) selection
 
-           dispatch.call('change');
-           return this;
-         };
 
-         drawMapFeatures.supported = function () {
-           return !!getService();
-         };
+             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.
 
-         init();
-         return drawMapFeatures;
-       }
 
-       function svgOpenstreetcamImages(projection, context, dispatch) {
-         var throttledRedraw = throttle(function () {
-           dispatch.call('change');
-         }, 1000);
+           function cancel() {
+             _cancelFetch = true;
+             var thiz = input.node(); // clear (and remove) selection, and replace field contents
 
-         var minZoom = 12;
-         var minMarkerZoom = 16;
-         var minViewfieldZoom = 18;
-         var layer = select(null);
+             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 _openstreetcam;
+         combobox.canAutocomplete = function (val) {
+           if (!arguments.length) return _canAutocomplete;
+           _canAutocomplete = val;
+           return combobox;
+         };
 
-         function init() {
-           if (svgOpenstreetcamImages.initialized) return; // run once
+         combobox.caseSensitive = function (val) {
+           if (!arguments.length) return _caseSensitive;
+           _caseSensitive = val;
+           return combobox;
+         };
 
-           svgOpenstreetcamImages.enabled = false;
-           svgOpenstreetcamImages.initialized = true;
-         }
+         combobox.data = function (val) {
+           if (!arguments.length) return _data;
+           _data = val;
+           return combobox;
+         };
 
-         function getService() {
-           if (services.openstreetcam && !_openstreetcam) {
-             _openstreetcam = services.openstreetcam;
+         combobox.fetcher = function (val) {
+           if (!arguments.length) return _fetcher;
+           _fetcher = val;
+           return combobox;
+         };
 
-             _openstreetcam.event.on('loadedImages', throttledRedraw);
-           } else if (!services.openstreetcam && _openstreetcam) {
-             _openstreetcam = null;
-           }
+         combobox.minItems = function (val) {
+           if (!arguments.length) return _minItems;
+           _minItems = val;
+           return combobox;
+         };
 
-           return _openstreetcam;
-         }
+         combobox.itemsMouseEnter = function (val) {
+           if (!arguments.length) return _mouseEnterHandler;
+           _mouseEnterHandler = val;
+           return combobox;
+         };
 
-         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');
-           });
-         }
+         combobox.itemsMouseLeave = function (val) {
+           if (!arguments.length) return _mouseLeaveHandler;
+           _mouseLeaveHandler = val;
+           return combobox;
+         };
 
-         function hideLayer() {
-           throttledRedraw.cancel();
-           layer.transition().duration(250).style('opacity', 0).on('end', editOff);
-         }
+         return utilRebind(combobox, dispatch, 'on');
+       }
 
-         function editOn() {
-           layer.style('display', 'block');
-         }
+       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 editOff() {
-           layer.selectAll('.viewfield-group').remove();
-           layer.style('display', 'none');
-         }
+       function uiDisclosure(context, key, expandedDefault) {
+         var dispatch = dispatch$8('toggled');
 
-         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 _expanded;
 
-         function mouseover(d3_event, d) {
-           var service = getService();
-           if (service) service.setStyles(context, d);
-         }
+         var _label = utilFunctor('');
 
-         function mouseout() {
-           var service = getService();
-           if (service) service.setStyles(context, null);
-         }
+         var _updatePreference = true;
 
-         function transform(d) {
-           var t = svgPointTransform(projection)(d);
+         var _content = function _content() {};
 
-           if (d.ca) {
-             t += ' rotate(' + Math.floor(d.ca) + ',0,0)';
+         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';
            }
 
-           return t;
-         }
+           var hideToggle = selection.selectAll('.hide-toggle-' + key).data([0]); // enter
 
-         function filterImages(images) {
-           var fromDate = context.photos().fromDate();
-           var toDate = context.photos().toDate();
-           var usernames = context.photos().usernames();
+           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
 
-           if (fromDate) {
-             var fromTimestamp = new Date(fromDate).getTime();
-             images = images.filter(function (item) {
-               return new Date(item.captured_at).getTime() >= fromTimestamp;
-             });
-           }
+           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 (toDate) {
-             var toTimestamp = new Date(toDate).getTime();
-             images = images.filter(function (item) {
-               return new Date(item.captured_at).getTime() <= toTimestamp;
-             });
-           }
+           wrap = wrap.enter().append('div').attr('class', 'disclosure-wrap disclosure-wrap-' + key).merge(wrap).classed('hide', !_expanded);
 
-           if (usernames) {
-             images = images.filter(function (item) {
-               return usernames.indexOf(item.captured_by) !== -1;
-             });
+           if (_expanded) {
+             wrap.call(_content);
            }
 
-           return images;
-         }
+           function toggle(d3_event) {
+             d3_event.preventDefault();
+             _expanded = !_expanded;
 
-         function filterSequences(sequences) {
-           var fromDate = context.photos().fromDate();
-           var toDate = context.photos().toDate();
-           var usernames = context.photos().usernames();
+             if (_updatePreference) {
+               corePreferences('disclosure.' + key + '.expanded', _expanded);
+             }
 
-           if (fromDate) {
-             var fromTimestamp = new Date(fromDate).getTime();
-             sequences = sequences.filter(function (image) {
-               return new Date(image.properties.captured_at).getTime() >= fromTimestamp;
-             });
-           }
+             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 (toDate) {
-             var toTimestamp = new Date(toDate).getTime();
-             sequences = sequences.filter(function (image) {
-               return new Date(image.properties.captured_at).getTime() <= toTimestamp;
-             });
-           }
+             if (_expanded) {
+               wrap.call(_content);
+             }
 
-           if (usernames) {
-             sequences = sequences.filter(function (image) {
-               return usernames.indexOf(image.properties.captured_by) !== -1;
-             });
+             dispatch.call('toggled', this, _expanded);
            }
+         };
 
-           return sequences;
-         }
+         disclosure.label = function (val) {
+           if (!arguments.length) return _label;
+           _label = utilFunctor(val);
+           return disclosure;
+         };
 
-         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 = [];
+         disclosure.expanded = function (val) {
+           if (!arguments.length) return _expanded;
+           _expanded = val;
+           return disclosure;
+         };
 
-           if (context.photos().showsFlat()) {
-             sequences = service ? service.sequences(projection) : [];
-             images = service && showMarkers ? service.images(projection) : [];
-             sequences = filterSequences(sequences);
-             images = filterImages(images);
-           }
+         disclosure.updatePreference = function (val) {
+           if (!arguments.length) return _updatePreference;
+           _updatePreference = val;
+           return disclosure;
+         };
 
-           var traces = layer.selectAll('.sequences').selectAll('.sequence').data(sequences, function (d) {
-             return d.properties.key;
-           }); // exit
+         disclosure.content = function (val) {
+           if (!arguments.length) return _content;
+           _content = val;
+           return disclosure;
+         };
+
+         return utilRebind(disclosure, dispatch, 'on');
+       }
 
-           traces.exit().remove(); // enter/update
+       // Can be labeled and collapsible.
 
-           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
+       function uiSection(id, context) {
+         var _classes = utilFunctor('');
 
-           groups.exit().remove(); // enter
+         var _shouldDisplay;
 
-           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 _content;
 
-           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');
-         }
+         var _disclosure;
 
-         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);
+         var _label;
 
-           if (enabled) {
-             if (service && ~~context.map().zoom() >= minZoom) {
-               editOn();
-               update();
-               service.loadImages(projection);
-             } else {
-               editOff();
-             }
-           }
-         }
+         var _expandedByDefault = utilFunctor(true);
 
-         drawImages.enabled = function (_) {
-           if (!arguments.length) return svgOpenstreetcamImages.enabled;
-           svgOpenstreetcamImages.enabled = _;
+         var _disclosureContent;
 
-           if (svgOpenstreetcamImages.enabled) {
-             showLayer();
-             context.photos().on('change.openstreetcam_images', update);
-           } else {
-             hideLayer();
-             context.photos().on('change.openstreetcam_images', null);
-           }
+         var _disclosureExpanded;
 
-           dispatch.call('change');
-           return this;
+         var _containerSelection = select(null);
+
+         var section = {
+           id: id
          };
 
-         drawImages.supported = function () {
-           return !!getService();
+         section.classes = function (val) {
+           if (!arguments.length) return _classes;
+           _classes = utilFunctor(val);
+           return section;
          };
 
-         init();
-         return drawImages;
-       }
+         section.label = function (val) {
+           if (!arguments.length) return _label;
+           _label = utilFunctor(val);
+           return section;
+         };
 
-       function svgOsm(projection, context, dispatch) {
-         var enabled = true;
+         section.expandedByDefault = function (val) {
+           if (!arguments.length) return _expandedByDefault;
+           _expandedByDefault = utilFunctor(val);
+           return section;
+         };
 
-         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;
-           });
-         }
+         section.shouldDisplay = function (val) {
+           if (!arguments.length) return _shouldDisplay;
+           _shouldDisplay = utilFunctor(val);
+           return section;
+         };
 
-         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');
-           });
-         }
+         section.content = function (val) {
+           if (!arguments.length) return _content;
+           _content = val;
+           return section;
+         };
 
-         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');
-           });
-         }
+         section.disclosureContent = function (val) {
+           if (!arguments.length) return _disclosureContent;
+           _disclosureContent = val;
+           return section;
+         };
 
-         drawOsm.enabled = function (val) {
-           if (!arguments.length) return enabled;
-           enabled = val;
+         section.disclosureExpanded = function (val) {
+           if (!arguments.length) return _disclosureExpanded;
+           _disclosureExpanded = val;
+           return section;
+         }; // may be called multiple times
 
-           if (enabled) {
-             showLayer();
-           } else {
-             hideLayer();
-           }
 
-           dispatch.call('change');
-           return this;
-         };
+         section.render = function (selection) {
+           _containerSelection = selection.selectAll('.section-' + id).data([0]);
 
-         return drawOsm;
-       }
+           var sectionEnter = _containerSelection.enter().append('div').attr('class', 'section section-' + id + ' ' + (_classes && _classes() || ''));
 
-       var _notesEnabled = false;
+           _containerSelection = sectionEnter.merge(_containerSelection);
 
-       var _osmService;
+           _containerSelection.call(renderContent);
+         };
 
-       function svgNotes(projection, context, dispatch$1) {
-         if (!dispatch$1) {
-           dispatch$1 = dispatch('change');
-         }
+         section.reRender = function () {
+           _containerSelection.call(renderContent);
+         };
 
-         var throttledRedraw = throttle(function () {
-           dispatch$1.call('change');
-         }, 1000);
+         section.selection = function () {
+           return _containerSelection;
+         };
 
-         var minZoom = 12;
-         var touchLayer = select(null);
-         var drawLayer = select(null);
-         var _notesVisible = false;
+         section.disclosure = function () {
+           return _disclosure;
+         }; // may be called multiple times
 
-         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 renderContent(selection) {
+           if (_shouldDisplay) {
+             var shouldDisplay = _shouldDisplay();
 
-         function getService() {
-           if (services.osm && !_osmService) {
-             _osmService = services.osm;
+             selection.classed('hide', !shouldDisplay);
 
-             _osmService.on('loadedNotes', throttledRedraw);
-           } else if (!services.osm && _osmService) {
-             _osmService = null;
+             if (!shouldDisplay) {
+               selection.html('');
+               return;
+             }
            }
 
-           return _osmService;
-         } // Show the notes
-
+           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);
+             }
 
-         function editOn() {
-           if (!_notesVisible) {
-             _notesVisible = true;
-             drawLayer.style('display', 'block');
-           }
-         } // Immediately remove the notes and their touch targets
+             if (_disclosureExpanded !== undefined) {
+               _disclosure.expanded(_disclosureExpanded);
 
+               _disclosureExpanded = undefined;
+             }
 
-         function editOff() {
-           if (_notesVisible) {
-             _notesVisible = false;
-             drawLayer.style('display', 'none');
-             drawLayer.selectAll('.note').remove();
-             touchLayer.selectAll('.note').remove();
+             selection.call(_disclosure);
+             return;
            }
-         } // Enable the layer.  This shows the notes and transitions them to visible.
 
+           if (_content) {
+             selection.call(_content);
+           }
+         }
 
-         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.
+         return section;
+       }
 
+       // {
+       //   key: 'string',     // required
+       //   value: 'string'    // optional
+       // }
+       //   -or-
+       // {
+       //   qid: 'string'      // brand wikidata  (e.g. 'Q37158')
+       // }
+       //
 
-         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
+       function uiTagReference(what) {
+         var wikibase = what.qid ? services.wikidata : services.osmWikibase;
+         var tagReference = {};
 
+         var _button = select(null);
 
-         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 _body = select(null);
 
-           var notes = drawLayer.selectAll('.note').data(data, function (d) {
-             return d.status + d.id;
-           }); // exit
+         var _loaded;
 
-           notes.exit().remove(); // enter
+         var _showing;
 
-           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
+         function load() {
+           if (!wikibase) return;
 
-           notes.merge(notesEnter).sort(sortY).classed('selected', function (d) {
-             var mode = context.mode();
-             var isMoving = mode && mode.id === 'drag-note'; // no shadows when dragging
+           _button.classed('tag-reference-loading', true);
 
-             return !isMoving && d.id === selectedID;
-           }).attr('transform', getTransform); // Draw targets..
+           wikibase.getDocs(what, gotDocs);
+         }
 
-           if (touchLayer.empty()) return;
-           var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
-           var targets = touchLayer.selectAll('.note').data(data, function (d) {
-             return d.id;
-           }); // exit
+         function gotDocs(err, docs) {
+           _body.html('');
 
-           targets.exit().remove(); // enter/update
+           if (!docs || !docs.title) {
+             _body.append('p').attr('class', 'tag-reference-description').html(_t.html('inspector.no_documentation_key'));
 
-           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);
+             done();
+             return;
+           }
 
-           function sortY(a, b) {
-             return a.id === selectedID ? 1 : b.id === selectedID ? -1 : b.loc[1] - a.loc[1];
+           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();
            }
-         } // Draw the notes layer and schedule loading notes and updating markers.
 
+           _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'));
 
-         function drawNotes(selection) {
-           var service = getService();
-           var surface = context.surface();
+           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
 
-           if (surface && !surface.empty()) {
-             touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
+
+           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'));
            }
+         }
 
-           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);
+         function done() {
+           _loaded = true;
 
-           if (_notesEnabled) {
-             if (service && ~~context.map().zoom() >= minZoom) {
-               editOn();
-               service.loadNotes(projection);
-               updateMarkers();
-             } else {
-               editOff();
-             }
-           }
-         } // Toggles the layer on and off
+           _button.classed('tag-reference-loading', false);
 
+           _body.classed('expanded', true).transition().duration(200).style('max-height', '200px').style('opacity', '1');
 
-         drawNotes.enabled = function (val) {
-           if (!arguments.length) return _notesEnabled;
-           _notesEnabled = val;
+           _showing = true;
 
-           if (_notesEnabled) {
-             layerOn();
-           } else {
-             layerOff();
+           _button.selectAll('svg.icon use').each(function () {
+             var iconUse = select(this);
 
-             if (context.selectedNoteID()) {
-               context.enter(modeBrowse(context));
+             if (iconUse.attr('href') === '#iD-icon-info') {
+               iconUse.attr('href', '#iD-icon-info-filled');
              }
-           }
+           });
+         }
 
-           dispatch$1.call('change');
-           return this;
-         };
+         function hide() {
+           _body.transition().duration(200).style('max-height', '0px').style('opacity', '0').on('end', function () {
+             _body.classed('expanded', false);
+           });
 
-         return drawNotes;
-       }
+           _showing = false;
 
-       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;
+           _button.selectAll('svg.icon use').each(function () {
+             var iconUse = select(this);
+
+             if (iconUse.attr('href') === '#iD-icon-info-filled') {
+               iconUse.attr('href', '#iD-icon-info');
+             }
            });
          }
 
-         return drawTouch;
-       }
+         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);
 
-       function refresh(selection, node) {
-         var cr = node.getBoundingClientRect();
-         var prop = [cr.width, cr.height];
-         selection.property('__dimensions__', prop);
-         return prop;
-       }
+           _button.on('click', function (d3_event) {
+             d3_event.stopPropagation();
+             d3_event.preventDefault();
+             this.blur(); // avoid keeping focus on the button - #4641
 
-       function utilGetDimensions(selection, force) {
-         if (!selection || selection.empty()) {
-           return [0, 0];
-         }
+             if (_showing) {
+               hide();
+             } else if (_loaded) {
+               done();
+             } else {
+               load();
+             }
+           });
+         };
 
-         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;
-         }
+         tagReference.body = function (selection) {
+           var itemID = what.qid || what.key + '-' + (what.value || '');
+           _body = selection.selectAll('.tag-reference-body').data([itemID], function (d) {
+             return d;
+           });
 
-         var node = selection.node();
+           _body.exit().remove();
 
-         if (dimensions === null) {
-           refresh(selection, node);
-           return selection;
-         }
+           _body = _body.enter().append('div').attr('class', 'tag-reference-body').style('max-height', '0').style('opacity', '0').merge(_body);
 
-         return selection.property('__dimensions__', [dimensions[0], dimensions[1]]).attr('width', dimensions[0]).attr('height', dimensions[1]);
+           if (_showing === false) {
+             hide();
+           }
+         };
+
+         tagReference.showing = function (val) {
+           if (!arguments.length) return _showing;
+           _showing = val;
+           return tagReference;
+         };
+
+         return tagReference;
        }
 
-       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)
+       function uiSectionRawTagEditor(id, context) {
+         var section = uiSection(id, context).classes('raw-tag-editor').label(function () {
+           var count = Object.keys(_tags).filter(function (d) {
+             return d;
+           }).length;
+           return _t('inspector.title_count', {
+             title: _t.html('inspector.tags'),
+             count: count
+           });
+         }).expandedByDefault(false).disclosureContent(renderDisclosureContent);
+         var taginfo = services.taginfo;
+         var dispatch = dispatch$8('change');
+         var availableViews = [{
+           id: 'list',
+           icon: '#fas-th-list'
          }, {
-           id: 'touch',
-           layer: svgTouch()
+           id: 'text',
+           icon: '#fas-i-cursor'
          }];
 
-         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);
-           });
-         }
+         var _tagView = corePreferences('raw-tag-editor-view') || 'list'; // 'list, 'text'
 
-         drawLayers.all = function () {
-           return _layers;
-         };
 
-         drawLayers.layer = function (id) {
-           var obj = _layers.find(function (o) {
-             return o.id === id;
-           });
+         var _readOnlyTags = []; // the keys in the order we want them to display
+
+         var _orderedKeys = [];
+         var _showBlank = false;
+         var _pendingChange = null;
+
+         var _state;
+
+         var _presets;
+
+         var _tags;
 
-           return obj && obj.layer;
-         };
+         var _entityIDs;
 
-         drawLayers.only = function (what) {
-           var arr = [].concat(what);
+         var _didInteract = false;
 
-           var all = _layers.map(function (layer) {
-             return layer.id;
-           });
+         function interacted() {
+           _didInteract = true;
+         }
 
-           return drawLayers.remove(utilArrayDifference(all, arr));
-         };
+         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
 
-         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;
-         };
+           var all = Object.keys(_tags).sort();
+           var missingKeys = utilArrayDifference(all, _orderedKeys);
 
-         drawLayers.add = function (what) {
-           var arr = [].concat(what);
-           arr.forEach(function (obj) {
-             if ('id' in obj && 'layer' in obj) {
-               _layers.push(obj);
-             }
-           });
-           dispatch$1.call('change');
-           return this;
-         };
+           for (var i in missingKeys) {
+             _orderedKeys.push(missingKeys[i]);
+           } // assemble row data
 
-         drawLayers.dimensions = function (val) {
-           if (!arguments.length) return utilGetDimensions(svg);
-           utilSetDimensions(svg, val);
-           return this;
-         };
 
-         return utilRebind(drawLayers, dispatch$1, 'on');
-       }
+           var rowData = _orderedKeys.map(function (key, i) {
+             return {
+               index: i,
+               key: key,
+               value: _tags[key]
+             };
+           }); // append blank row last, if necessary
 
-       function svgLines(projection, context) {
-         var detected = utilDetect();
-         var highway_stack = {
-           motorway: 0,
-           motorway_link: 1,
-           trunk: 2,
-           trunk_link: 3,
-           primary: 4,
-           primary_link: 5,
-           secondary: 6,
-           tertiary: 7,
-           unclassified: 8,
-           residential: 9,
-           service: 10,
-           footway: 11
-         };
 
-         function drawTargets(selection, graph, entities, filter) {
-           var targetClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
-           var nopeClass = context.getDebug('target') ? 'red ' : 'nocolor ';
-           var getPath = svgPath(projection).geojson;
-           var activeID = context.activeID();
-           var base = context.history().base(); // The targets and nopes will be MultiLineString sub-segments of the ways
+           if (!rowData.length || _showBlank) {
+             _showBlank = false;
+             rowData.push({
+               index: rowData.length,
+               key: '',
+               value: ''
+             });
+           } // View Options
 
-           var data = {
-             targets: [],
-             nopes: []
-           };
-           entities.forEach(function (way) {
-             var features = svgSegmentWay(way, graph, activeID);
-             data.targets.push.apply(data.targets, features.passive);
-             data.nopes.push.apply(data.nopes, features.active);
-           }); // Targets allow hover and vertex snapping
 
-           var targetData = data.targets.filter(getPath);
-           var targets = selection.selectAll('.line.target-allowed').filter(function (d) {
-             return filter(d.properties.entity);
-           }).data(targetData, function key(d) {
+           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;
-           }); // exit
-
-           targets.exit().remove();
+           }).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
 
-           var segmentWasEdited = function segmentWasEdited(d) {
-             var wayID = d.properties.entity.id; // if the whole line was edited, don't draw segment changes
+           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
 
-             if (!base.entities[wayID] || !fastDeepEqual(graph.entities[wayID].nodes, base.entities[wayID].nodes)) {
-               return false;
-             }
+           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
 
-             return d.properties.nodes.some(function (n) {
-               return !base.entities[n.id] || !fastDeepEqual(graph.entities[n.id].loc, base.entities[n.id].loc);
-             });
-           }; // enter/update
+           var 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
 
+           addRowEnter.append('div').attr('class', 'space-buttons'); // preserve space
+           // Tag list items
 
-           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 items = list.selectAll('.tag-row').data(rowData, function (d) {
+             return d.key;
+           });
+           items.exit().each(unbind).remove(); // Enter
 
-           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 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
 
-           nopes.exit().remove(); // enter/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
 
-           nopes.enter().append('path').merge(nopes).attr('d', getPath).attr('class', function (d) {
-             return 'way line target target-nope ' + nopeClass + d.id;
-           }).classed('segment-edited', segmentWasEdited);
-         }
+             var value = row.select('input.value'); // propagate bound data
 
-         function drawLines(selection, graph, entities, filter) {
-           var base = context.history().base();
+             if (_entityIDs && taginfo && _state !== 'hover') {
+               bindTypeahead(key, value);
+             }
 
-           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;
+             var referenceOptions = {
+               key: d.key
+             };
 
-             if (a.tags.highway) {
-               scoreA -= highway_stack[a.tags.highway];
+             if (typeof d.value === 'string') {
+               referenceOptions.value = d.value;
              }
 
-             if (b.tags.highway) {
-               scoreB -= highway_stack[b.tags.highway];
+             var reference = uiTagReference(referenceOptions);
+
+             if (_state === 'hover') {
+               reference.showing(false);
              }
 
-             return scoreA - scoreB;
+             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
+         }
+
+         function isReadOnly(d) {
+           for (var i = 0; i < _readOnlyTags.length; i++) {
+             if (d.key.match(_readOnlyTags[i]) !== null) {
+               return true;
+             }
            }
 
-           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.
+           return false;
+         }
 
-             lines.enter().append('path').attr('class', function (d) {
-               var prefix = 'way line'; // if this line isn't styled by its own tags
+         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');
+         }
 
-               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
+         function stringify(s) {
+           return JSON.stringify(s).slice(1, -1); // without leading/trailing "
+         }
 
-                 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';
-                 }
-               }
+         function unstringify(s) {
+           var leading = '';
+           var trailing = '';
 
-               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;
+           if (s.length < 1 || s.charAt(0) !== '"') {
+             leading = '"';
            }
 
-           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;
-               });
-             };
+           if (s.length < 2 || s.charAt(s.length - 1) !== '"' || s.charAt(s.length - 1) === '"' && s.charAt(s.length - 2) === '\\') {
+             trailing = '"';
            }
 
-           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;
-             });
+           return JSON.parse(leading + s + trailing);
+         }
 
-             if (detected.ie) {
-               markers.each(function () {
-                 this.parentNode.insertBefore(this, this);
-               });
-             }
+         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 (_state !== 'hover' && str.length) {
+             return str + '\n';
            }
 
-           var getPath = svgPath(projection, graph);
-           var ways = [];
-           var onewaydata = {};
-           var sideddata = {};
-           var oldMultiPolygonOuters = {};
+           return str;
+         }
 
-           for (var i = 0; i < entities.length; i++) {
-             var entity = entities[i];
-             var outer = osmOldMultipolygonOuterMember(entity, graph);
+         function textChanged() {
+           var newText = this.value.trim();
+           var newTags = {};
+           newText.split('\n').forEach(function (row) {
+             var m = row.match(/^\s*([^=]+)=(.*)$/);
 
-             if (outer) {
-               ways.push(entity.mergeTags(outer.tags));
-               oldMultiPolygonOuters[outer.id] = true;
-             } else if (entity.geometry(graph) === 'line') {
-               ways.push(entity);
+             if (m !== null) {
+               var k = context.cleanTagKey(unstringify(m[1].trim()));
+               var v = context.cleanTagValue(unstringify(m[2].trim()));
+               newTags[k] = v;
              }
-           }
-
-           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
+           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 uncovered = selection.selectAll('.layer-osm.lines'); // over areas
+             if (change.newVal === '*' && typeof change.oldVal !== 'string') return;
 
-           var touchLayer = selection.selectAll('.layer-touch.lines'); // Draw lines..
+             if (change.type === '-') {
+               _pendingChange[change.key] = undefined;
+             } else if (change.type === '+') {
+               _pendingChange[change.key] = change.newVal || '';
+             }
+           });
 
-           [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..
+           if (Object.keys(_pendingChange).length === 0) {
+             _pendingChange = null;
+             return;
+           }
 
-           touchLayer.call(drawTargets, graph, ways, filter);
+           scheduleChange();
          }
 
-         return drawLines;
-       }
-
-       function svgMidpoints(projection, context) {
-         var targetRadius = 8;
-
-         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 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();
+           }
+         }
 
-           targets.exit().remove(); // enter/update
+         function bindTypeahead(key, value) {
+           if (isReadOnly(key.datum())) return;
 
-           targets.enter().append('circle').attr('r', targetRadius).merge(targets).attr('class', function (d) {
-             return 'node midpoint target ' + fillClass + d.id;
-           }).attr('transform', getTransform);
-         }
+           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 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 data = _tags[keyString].filter(Boolean).map(function (tagValue) {
+                 return {
+                   value: tagValue,
+                   title: tagValue
+                 };
+               });
 
-           if (mode && mode.id !== 'select' || !context.map().withinEditableZoom()) {
-             drawLayer.selectAll('.midpoint').remove();
-             touchLayer.selectAll('.midpoint.target').remove();
+               callback(data);
+             }));
              return;
            }
 
-           var poly = extent.polygon();
-           var midpoints = {};
+           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));
+             });
+           }));
+
+           function sort(value, data) {
+             var sameletter = [];
+             var other = [];
+
+             for (var i = 0; i < data.length; i++) {
+               if (data[i].value.substring(0, value.length) === value) {
+                 sameletter.push(data[i]);
+               } else {
+                 other.push(data[i]);
+               }
+             }
+
+             return sameletter.concat(other);
+           }
+         }
 
-           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);
+         function unbind() {
+           var row = select(this);
+           row.selectAll('input.key').call(uiCombobox.off, context);
+           row.selectAll('input.value').call(uiCombobox.off, context);
+         }
 
-             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('-');
+         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 (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 (_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 (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 (isReadOnly({
+             key: kNew
+           })) {
+             this.value = kOld;
+             return;
+           }
 
-                     if (point && geoVecLength(projection(a.loc), projection(point)) > 20 && geoVecLength(projection(b.loc), projection(point)) > 20) {
-                       loc = point;
-                       break;
-                     }
-                   }
-                 }
+           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 (loc) {
-                   midpoints[id] = {
-                     type: 'midpoint',
-                     id: id,
-                     loc: loc,
-                     edge: [a.id, b.id],
-                     parents: [entity]
-                   };
-                 }
+             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;
            }
 
-           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;
-               }
-             }
+           var row = this.parentNode.parentNode;
+           var inputVal = select(row).selectAll('input.value');
+           var vNew = context.cleanTagValue(utilGetSetValue(inputVal));
+           _pendingChange = _pendingChange || {};
 
-             return false;
+           if (kOld) {
+             _pendingChange[kOld] = undefined;
            }
 
-           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..
+           _pendingChange[kNew] = vNew; // update the ordered key index so this row doesn't change position
 
-           touchLayer.call(drawTargets, graph, Object.values(midpoints), midpointFilter);
-         }
+           var existingKeyIndex = _orderedKeys.indexOf(kOld);
 
-         return drawMidpoints;
-       }
+           if (existingKeyIndex !== -1) _orderedKeys[existingKeyIndex] = kNew;
+           d.key = kNew; // update datum to avoid exit/enter on tag update
 
-       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');
+           d.value = vNew;
+           this.value = kNew;
+           utilGetSetValue(inputVal, vNew);
+           scheduleChange();
          }
 
-         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.
+         function valueChange(d3_event, d) {
+           if (isReadOnly(d)) return; // exit if this is a multiselection and no value was entered
 
+           if (typeof d.value !== 'string' && !this.value) return; // exit if we are currently about to delete this row anyway - #6366
 
-         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);
+           if (_pendingChange && _pendingChange.hasOwnProperty(d.key) && _pendingChange[d.key] === undefined) return;
+           _pendingChange = _pendingChange || {};
+           _pendingChange[d.key] = context.cleanTagValue(this.value);
+           scheduleChange();
          }
 
-         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
+         function removeTag(d3_event, d) {
+           if (isReadOnly(d)) return;
 
-             data.push({
-               type: 'Feature',
-               id: node.id,
-               properties: {
-                 target: true,
-                 entity: node
-               },
-               geometry: node.asGeoJSON()
+           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;
              });
-           });
-           var targets = selection.selectAll('.point.target').filter(function (d) {
-             return filter(d.properties.entity);
-           }).data(data, function key(d) {
-             return d.id;
-           }); // exit
+             _pendingChange = _pendingChange || {};
+             _pendingChange[d.key] = undefined;
+             scheduleChange();
+           }
+         }
 
-           targets.exit().remove(); // enter/update
+         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);
+         }
 
-           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 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);
          }
 
-         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..
+         section.state = function (val) {
+           if (!arguments.length) return _state;
 
-           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..
+           if (_state !== val) {
+             _orderedKeys = [];
+             _state = val;
+           }
 
+           return section;
+         };
 
-           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..
+         section.presets = function (val) {
+           if (!arguments.length) return _presets;
+           _presets = val;
 
-           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
+           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);
+           }
 
-           groups.select('.stroke'); // propagate bound data
+           return section;
+         };
 
-           groups.select('.icon') // propagate bound data
-           .attr('xlink:href', function (entity) {
-             var preset = _mainPresetIndex.match(entity, graph);
-             var picon = preset && preset.icon;
+         section.tags = function (val) {
+           if (!arguments.length) return _tags;
+           _tags = val;
+           return section;
+         };
 
-             if (!picon) {
-               return '';
-             } else {
-               var isMaki = /^maki-/.test(picon);
-               return '#' + picon + (isMaki ? '-11' : '');
-             }
-           }); // Draw touch targets..
+         section.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
 
-           touchLayer.call(drawTargets, graph, points, filter);
-         }
+           if (!_entityIDs || !val || !utilArrayIdentical(_entityIDs, val)) {
+             _entityIDs = val;
+             _orderedKeys = [];
+           }
 
-         return drawPoints;
+           return section;
+         }; // pass an array of regular expressions to test against the tag key
+
+
+         section.readOnlyTags = function (val) {
+           if (!arguments.length) return _readOnlyTags;
+           _readOnlyTags = val;
+           return section;
+         };
+
+         return utilRebind(section, dispatch, 'on');
        }
 
-       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 uiDataEditor(context) {
+         var dataHeader = uiDataHeader();
+         var rawTagEditor = uiSectionRawTagEditor('custom-data-tag-editor', context).expandedByDefault(true).readOnlyTags([/./]);
 
-         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 _datum;
 
-             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
+         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
 
-             return 'translate(' + (r * Math.cos(a) + o[0]) + ',' + (r * Math.sin(a) + o[1]) + ') ' + 'rotate(' + a * 180 / Math.PI + ')';
-           }
+           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 drawLayer = selection.selectAll('.layer-osm.points .points-group.turns');
-           var touchLayer = selection.selectAll('.layer-touch.turns'); // Draw turns..
+           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 groups = drawLayer.selectAll('g.turn').data(turns, function (d) {
-             return d.key;
-           }); // exit
+         dataEditor.datum = function (val) {
+           if (!arguments.length) return _datum;
+           _datum = val;
+           return this;
+         };
 
-           groups.exit().remove(); // enter
+         return dataEditor;
+       }
 
-           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
+       var pair_1 = pair;
 
-           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 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
 
-           groups.select('circle'); // propagate bound data
-           // Draw touch targets..
+         var matched = m[0]; // extract dimension.. m[1] = leading, m[5] = trailing
 
-           var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
-           groups = touchLayer.selectAll('g.turn').data(turns, function (d) {
-             return d.key;
-           }); // exit
+         var dim;
 
-           groups.exit().remove(); // enter
+         if (m[1] && m[5]) {
+           // if matched both..
+           dim = m[1]; // keep leading
 
-           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
+           matched = matched.slice(0, -1); // remove trailing dimension from match
+         } else {
+           dim = m[1] || m[5];
+         } // if unrecognized dimension
 
-           groups = groups.merge(groupsEnter).attr('transform', turnTransform);
-           groups.select('rect'); // propagate bound data
 
-           groups.select('circle'); // propagate bound data
+         if (dim && dims.indexOf(dim) === -1) return null; // extract DMS
 
-           return this;
+         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 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];
          }
+       }
 
-         return drawTurns;
+       function swapdim(a, b, dim) {
+         if (dim === 'N' || dim === 'S') return [a, b];
+         if (dim === 'W' || dim === 'E') return [b, a];
        }
 
-       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 uiFeatureList(context) {
+         var _geocodeResults;
 
-         var _currHoverTarget;
+         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 _currPersistent = {};
-         var _currHover = {};
-         var _prevHover = {};
-         var _currSelected = {};
-         var _prevSelected = {};
-         var _radii = {};
+           function focusSearch(d3_event) {
+             var mode = context.mode() && context.mode().id;
+             if (mode !== 'browse') return;
+             d3_event.preventDefault();
+             search.node().focus();
+           }
 
-         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.
+           function keydown(d3_event) {
+             if (d3_event.keyCode === 27) {
+               // escape
+               search.node().blur();
+             }
+           }
 
+           function keypress(d3_event) {
+             var q = search.property('value'),
+                 items = list.selectAll('.feature-list-item');
 
-         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);
-         }
+             if (d3_event.keyCode === 13 && // ↩ Return
+             q.length && items.size()) {
+               click(d3_event, items.datum());
+             }
+           }
 
-         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 inputevent() {
+             _geocodeResults = undefined;
+             drawList();
+           }
 
-           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 clearSearch() {
+             search.property('value', '');
+             drawList();
+           }
+
+           function mapDrawn(e) {
+             if (e.full) {
+               drawList();
+             }
+           }
+
+           function features() {
+             var result = [];
+             var graph = context.graph();
+             var visibleCenter = context.map().extent().center();
+             var q = search.property('value').toLowerCase();
+             if (!q) return result;
+             var locationMatch = pair_1(q.toUpperCase()) || q.match(/^(-?\d+\.?\d*)\s+(-?\d+\.?\d*)$/);
 
+             if (locationMatch) {
+               var loc = [parseFloat(locationMatch[0]), parseFloat(locationMatch[1])];
+               result.push({
+                 id: -1,
+                 geometry: 'point',
+                 type: _t('inspector.location'),
+                 name: dmsCoordinatePair([loc[1], loc[0]]),
+                 location: loc
+               });
+             } // A location search takes priority over an ID search
 
-           function getDirections(entity) {
-             if (entity.id in directions) return directions[entity.id];
-             var angles = entity.directions(graph, projection);
-             directions[entity.id] = angles.length ? angles : false;
-             return angles;
-           }
 
-           function updateAttributes(selection) {
-             ['shadow', 'stroke', 'fill'].forEach(function (klass) {
-               var rads = radiuses[klass];
-               selection.selectAll('.' + klass).each(function (entity) {
-                 var i = z && getIcon(entity);
-                 var r = rads[i ? 3 : z]; // slightly increase the size of unconnected endpoints #3775
+             var idMatch = !locationMatch && q.match(/(?:^|\W)(node|way|relation|[nwr])\W?0*([1-9]\d*)(?:\W|$)/i);
 
-                 if (entity.id !== activeID && entity.isEndpoint(graph) && !entity.isConnected(graph)) {
-                   r += 1.5;
-                 }
+             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
+               });
+             }
 
-                 if (klass === 'shadow') {
-                   // remember this value, so we don't need to
-                   _radii[entity.id] = r; // recompute it when we draw the touch targets
-                 }
+             var allEntities = graph.entities;
+             var localResults = [];
 
-                 select(this).attr('r', r).attr('visibility', i && klass === 'fill' ? 'hidden' : null);
+             for (var id in allEntities) {
+               var entity = allEntities[id];
+               if (!entity) continue;
+               var name = utilDisplayName(entity) || '';
+               if (name.toLowerCase().indexOf(q) < 0) continue;
+               var matched = _mainPresetIndex.match(entity, graph);
+               var type = matched && matched.name() || utilDisplayType(entity.id);
+               var extent = entity.extent(graph);
+               var distance = extent ? geoSphericalDistance(visibleCenter, extent.center()) : 0;
+               localResults.push({
+                 id: entity.id,
+                 entity: entity,
+                 geometry: entity.geometry(graph),
+                 type: type,
+                 name: name,
+                 distance: distance
                });
+               if (localResults.length > 100) break;
+             }
+
+             localResults = localResults.sort(function byDistance(a, b) {
+               return a.distance - b.distance;
              });
-           }
+             result = result.concat(localResults);
 
-           vertices.sort(sortY);
-           var groups = selection.selectAll('g.vertex').filter(filter).data(vertices, fastEntityKey); // exit
+             (_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
+                 };
 
-           groups.exit().remove(); // enter
+                 if (d.osm_type === 'way') {
+                   // for ways, add some fake closed nodes
+                   attrs.nodes = ['a', 'a']; // so that geometry area is possible
+                 }
 
-           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.
+                 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])])
+                 });
+               }
+             });
 
-           enter.filter(function (d) {
-             return d.hasInterestingTags();
-           }).append('circle').attr('class', 'fill'); // update
+             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
+               });
+             }
 
-           groups = groups.merge(enter).attr('transform', svgPointTransform(projection)).classed('sibling', function (d) {
-             return d.id in sets.selected;
-           }).classed('shared', function (d) {
-             return graph.isShared(d);
-           }).classed('endpoint', function (d) {
-             return d.isEndpoint(graph);
-           }).classed('added', function (d) {
-             return !base.entities[d.id]; // if it doesn't exist in the base graph, it's new
-           }).classed('moved', function (d) {
-             return base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].loc, base.entities[d.id].loc);
-           }).classed('retagged', function (d) {
-             return base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].tags, base.entities[d.id].tags);
-           }).call(updateAttributes); // Vertices with icons get a `use`.
+             return result;
+           }
 
-           var iconUse = groups.selectAll('.icon').data(function data(d) {
-             return zoom >= 17 && getIcon(d) ? [d] : [];
-           }, fastEntityKey); // exit
+           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'));
 
-           iconUse.exit().remove(); // enter
+             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'));
+             }
 
-           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
+             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();
+           }
 
-           var dgroups = groups.selectAll('.viewfieldgroup').data(function data(d) {
-             return zoom >= 18 && getDirections(d) ? [d] : [];
-           }, fastEntityKey); // exit
+           function mouseover(d3_event, d) {
+             if (d.id === -1) return;
+             utilHighlightEntities([d.id], true, context);
+           }
 
-           dgroups.exit().remove(); // enter/update
+           function mouseout(d3_event, d) {
+             if (d.id === -1) return;
+             utilHighlightEntities([d.id], false, context);
+           }
 
-           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
+           function click(d3_event, d) {
+             d3_event.preventDefault();
 
-           viewfields.exit().remove(); // enter/update
+             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);
+             }
+           }
 
-           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 geocoderSearch() {
+             services.geocoder.search(search.property('value'), function (err, resp) {
+               _geocodeResults = resp || [];
+               drawList();
+             });
+           }
          }
 
-         function drawTargets(selection, graph, entities, filter) {
-           var targetClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
-           var nopeClass = context.getDebug('target') ? 'red ' : 'nocolor ';
-           var getTransform = svgPointTransform(projection).geojson;
-           var activeID = context.activeID();
-           var data = {
-             targets: [],
-             nopes: []
-           };
-           entities.forEach(function (node) {
-             if (activeID === node.id) return; // draw no target on the activeID
-
-             var vertexType = svgPassiveVertex(node, graph, activeID);
-
-             if (vertexType !== 0) {
-               // passive or adjacent - allow to connect
-               data.targets.push({
-                 type: 'Feature',
-                 id: node.id,
-                 properties: {
-                   target: true,
-                   entity: node
-                 },
-                 geometry: node.asGeoJSON()
-               });
-             } else {
-               data.nopes.push({
-                 type: 'Feature',
-                 id: node.id + '-nope',
-                 properties: {
-                   nope: true,
-                   target: true,
-                   entity: node
-                 },
-                 geometry: node.asGeoJSON()
-               });
-             }
-           }); // Targets allow hover and vertex snapping
+         return featureList;
+       }
 
-           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
+       var getOwnPropertyDescriptor$1 = objectGetOwnPropertyDescriptor.f;
 
-           targets.exit().remove(); // enter/update
 
-           targets.enter().append('circle').attr('r', function (d) {
-             return _radii[d.id] || radiuses.shadow[3];
-           }).merge(targets).attr('class', function (d) {
-             return 'node vertex target target-allowed ' + targetClass + d.id;
-           }).attr('transform', getTransform); // NOPE
 
-           var nopes = selection.selectAll('.vertex.target-nope').filter(function (d) {
-             return filter(d.properties.entity);
-           }).data(data.nopes, function key(d) {
-             return d.id;
-           }); // exit
 
-           nopes.exit().remove(); // enter/update
 
-           nopes.enter().append('circle').attr('r', function (d) {
-             return _radii[d.properties.entity.id] || radiuses.shadow[3];
-           }).merge(nopes).attr('class', function (d) {
-             return 'node vertex target target-nope ' + nopeClass + d.id;
-           }).attr('transform', getTransform);
-         } // Points can also render as vertices:
-         // 1. in wireframe mode or
-         // 2. at higher zooms if they have a direction
 
+       // eslint-disable-next-line es/no-string-prototype-startswith -- safe
+       var $startsWith = ''.startsWith;
+       var min$1 = Math.min;
 
-         function renderAsVertex(entity, graph, wireframe, zoom) {
-           var geometry = entity.geometry(graph);
-           return geometry === 'vertex' || geometry === 'point' && (wireframe || zoom >= 18 && entity.directions(graph, projection).length);
-         }
+       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$1(String.prototype, 'startsWith');
+         return descriptor && !descriptor.writable;
+       }();
 
-         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);
+       // `String.prototype.startsWith` method
+       // https://tc39.es/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$1(arguments.length > 1 ? arguments[1] : undefined, that.length));
+           var search = String(searchString);
+           return $startsWith
+             ? $startsWith.call(that, search, index)
+             : that.slice(index, index + search.length) === search;
          }
+       });
 
-         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);
+       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 (!context.features().isHiddenFeature(entity, graph, geometry)) {
-               var i;
+         var _expanded = preference === null ? true : preference === 'true';
 
-               if (entity.type === 'way') {
-                 for (i = 0; i < entity.nodes.length; i++) {
-                   var child = graph.hasEntity(entity.nodes[i]);
+         var _entityIDs = [];
+         var _issues = [];
 
-                   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);
+         var _activeIssueID;
 
-                   if (member) {
-                     addChildVertices(member);
-                   }
-                 }
-               } else if (renderAsVertex(entity, graph, wireframe, zoom)) {
-                 results[entity.id] = entity;
-               }
-             }
-           }
+         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);
+         });
 
-           ids.forEach(function (id) {
-             var entity = graph.hasEntity(id);
-             if (!entity) return;
+         function reloadIssues() {
+           _issues = context.validator().getSharedEntityIssues(_entityIDs, {
+             includeDisabledRules: true
+           });
+         }
 
-             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);
-             }
+         function makeActiveIssue(issueID) {
+           _activeIssueID = issueID;
+           section.selection().selectAll('.issue-container').classed('active', function (d) {
+             return d.id === _activeIssueID;
            });
-           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 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
 
-           if (fullRedraw) {
-             _currPersistent = {};
-             _radii = {};
-           } // Collect important vertices from the `entities` list..
-           // (during a partial redraw, it will not contain everything)
+           containers.exit().remove(); // Enter
 
+           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
 
-           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..
+             var extent = d.extent(context.graph());
 
-             if (geometry === 'point' && renderAsVertex(entity, graph, wireframe, zoom)) {
-               _currPersistent[entity.id] = entity;
-               keep = true; // a vertex of some importance..
-             } else if (geometry === 'vertex' && (entity.hasInterestingTags() || entity.isEndpoint(graph) || entity.isConnected(graph) || visualDiff && isEditedNode(entity, base, graph))) {
-               _currPersistent[entity.id] = entity;
-               keep = true;
-             } // whatever this is, it's not a persistent vertex..
+             if (extent) {
+               var setZoom = Math.max(context.map().zoom(), 19);
+               context.map().unobscuredCenterZoomEase(extent.center(), setZoom);
+             }
+           });
+           textEnter.each(function (d) {
+             var iconName = '#iD-icon-' + (d.severity === 'warning' ? 'alert' : 'error');
+             select(this).call(svgIcon(iconName, 'issue-icon'));
+           });
+           textEnter.append('span').attr('class', 'issue-message');
+           var infoButton = labelsEnter.append('button').attr('class', 'issue-info-button').attr('title', _t('icons.information')).call(svgIcon('#iD-icon-inspect'));
+           infoButton.on('click', function (d3_event) {
+             d3_event.stopPropagation();
+             d3_event.preventDefault();
+             this.blur(); // avoid keeping focus on the button - #4641
 
+             var container = select(this.parentNode.parentNode.parentNode);
+             var info = container.selectAll('.issue-info');
+             var isExpanded = info.classed('expanded');
+             _expanded = !isExpanded;
+             corePreferences('entity-issues.reference.expanded', _expanded); // update preference
 
-             if (!keep && !fullRedraw) {
-               delete _currPersistent[entity.id];
+             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);
+               });
              }
-           } // 3 sets of vertices to consider:
+           });
+           itemsEnter.append('ul').attr('class', 'issue-fix-list');
+           containersEnter.append('div').attr('class', 'issue-info' + (_expanded ? ' expanded' : '')).style('max-height', _expanded ? null : '0').style('opacity', _expanded ? '1' : '0').each(function (d) {
+             if (typeof d.reference === 'function') {
+               select(this).call(d.reference);
+             } else {
+               select(this).html(_t.html('inspector.no_documentation_key'));
+             }
+           }); // Update
 
+           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 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 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)
 
-           };
-           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.
+             if (d.issue.dateLastRanFix && new Date() - d.issue.dateLastRanFix < 1000) return;
+             d.issue.dateLastRanFix = new Date(); // remove hover-highlighting
+
+             utilHighlightEntities(d.issue.entityIds.concat(d.entityIds), false, context);
+             new Promise(function (resolve, reject) {
+               d.onClick(context, resolve, reject);
+
+               if (d.onClick.length <= 1) {
+                 // if the fix doesn't take any completion parameters then consider it resolved
+                 resolve();
+               }
+             }).then(function () {
+               // revalidate whenever the fix has finished running successfully
+               context.validator().validate();
+             });
+           }).on('mouseover.highlight', function (d3_event, d) {
+             utilHighlightEntities(d.entityIds, true, context);
+           }).on('mouseout.highlight', function (d3_event, d) {
+             utilHighlightEntities(d.entityIds, false, context);
+           });
+           buttons.each(function (d) {
+             var iconName = d.icon || 'iD-icon-wrench';
 
-           var filterRendered = function filterRendered(d) {
-             return d.id in _currPersistent || d.id in _currSelected || d.id in _currHover || filter(d);
-           };
+             if (iconName.startsWith('maki')) {
+               iconName += '-15';
+             }
 
-           drawLayer.call(draw, graph, currentVisible(all), sets, filterRendered); // Draw touch targets..
-           // When drawing, render all targets (not just those affected by a partial redraw)
+             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;
+             }
 
-           var filterTouch = function filterTouch(d) {
-             return isMoving ? true : filterRendered(d);
-           };
+             return null;
+           });
+         }
 
-           touchLayer.call(drawTargets, graph, currentVisible(all), filterTouch);
+         section.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
 
-           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);
-             });
+           if (!_entityIDs || !val || !utilArrayIdentical(_entityIDs, val)) {
+             _entityIDs = val;
+             _activeIssueID = null;
+             reloadIssues();
            }
-         } // partial redraw - only update the selected items..
 
+           return section;
+         };
 
-         drawVertices.drawSelected = function (selection, graph, extent) {
-           var wireframe = context.surface().classed('fill-wireframe');
-           var zoom = geoScaleToZoom(projection.scale());
-           _prevSelected = _currSelected || {};
+         return section;
+       }
 
-           if (context.map().isInWideSelection()) {
-             _currSelected = {};
-             context.selectedIDs().forEach(function (id) {
-               var entity = graph.hasEntity(id);
-               if (!entity) return;
+       function uiPresetIcon() {
+         var _preset;
 
-               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 _geometry;
 
+         var _sizeClass = 'medium';
 
-           var filter = function filter(d) {
-             return d.id in _prevSelected;
-           };
+         function isSmall() {
+           return _sizeClass === 'small';
+         }
 
-           drawVertices(selection, graph, Object.values(_prevSelected), filter, extent, false);
-         }; // partial redraw - only update the hovered items..
+         function presetIcon(selection) {
+           selection.each(render);
+         }
 
+         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';
+         }
 
-         drawVertices.drawHover = function (selection, graph, target, extent) {
-           if (target === _currHoverTarget) return; // continue only if something changed
+         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 wireframe = context.surface().classed('fill-wireframe');
-           var zoom = geoScaleToZoom(projection.scale());
-           _prevHover = _currHover || {};
-           _currHoverTarget = target;
-           var entity = target && target.properties && target.properties.entity;
+         function renderCategoryBorder(container, category) {
+           var categoryBorder = container.selectAll('.preset-icon-category-border').data(category ? [0] : []);
+           categoryBorder.exit().remove();
+           var categoryBorderEnter = categoryBorder.enter();
+           var d = 60;
+           var svgEnter = categoryBorderEnter.append('svg').attr('class', 'preset-icon-fill preset-icon-category-border').attr('width', d).attr('height', d).attr('viewBox', "0 0 ".concat(d, " ").concat(d));
+           ['fill', 'stroke'].forEach(function (klass) {
+             svgEnter.append('path').attr('class', "area ".concat(klass)).attr('d', 'M9.5,7.5 L25.5,7.5 L28.5,12.5 L49.5,12.5 C51.709139,12.5 53.5,14.290861 53.5,16.5 L53.5,43.5 C53.5,45.709139 51.709139,47.5 49.5,47.5 L10.5,47.5 C8.290861,47.5 6.5,45.709139 6.5,43.5 L6.5,12.5 L9.5,7.5 Z');
+           });
+           categoryBorder = categoryBorderEnter.merge(categoryBorder);
 
-           if (entity) {
-             _currHover = getSiblingAndChildVertices([entity.id], graph, wireframe, zoom);
-           } else {
-             _currHover = {};
-           } // note that drawVertices will add `_currHover` automatically if needed..
+           if (category) {
+             var tagClasses = svgTagClasses().getClassesString(category.members.collection[0].addTags, '');
+             categoryBorder.selectAll('path.stroke').attr('class', "area stroke ".concat(tagClasses));
+             categoryBorder.selectAll('path.fill').attr('class', "area fill ".concat(tagClasses));
+           }
+         }
 
+         function renderCircleFill(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 filter = function filter(d) {
-             return d.id in _prevHover;
-           };
+         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));
+           });
+           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);
+           });
 
-           drawVertices(selection, graph, Object.values(_prevHover), filter, extent, false);
-         };
+           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);
+             });
+           }
 
-         return drawVertices;
-       }
+           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 utilBindOnce(target, type, listener, capture) {
-         var typeOnce = type + '.once';
+         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 one() {
-           target.on(typeOnce, null);
-           listener.apply(this, arguments);
+           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));
+           });
+           [[x1 - 1, y], [x2 + 1, y]].forEach(function (point) {
+             lineEnter.append('circle').attr('class', 'vertex').attr('cx', point[0]).attr('cy', point[1]).attr('r', r);
+           });
+           line = lineEnter.merge(line);
+           line.selectAll('path.stroke').attr('class', "line stroke ".concat(tagClasses));
+           line.selectAll('path.casing').attr('class', "line casing ".concat(tagClasses));
          }
 
-         target.on(typeOnce, one, capture);
-         return this;
-       }
+         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 defaultFilter$2(d3_event) {
-         return !d3_event.ctrlKey && !d3_event.button;
-       }
+           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);
 
-       function defaultExtent$1() {
-         var e = this;
+           if (drawRoute) {
+             var routeType = p.tags.type === 'waterway' ? 'waterway' : p.tags.route;
+             var segmentPresetIDs = routeSegments[routeType];
 
-         if (e instanceof SVGElement) {
-           e = e.ownerSVGElement || e;
+             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 (e.hasAttribute('viewBox')) {
-             e = e.viewBox.baseVal;
-             return [[e.x, e.y], [e.x + e.width, e.y + e.height]];
+         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';
            }
 
-           return [[0, 0], [e.width.baseVal.value, e.height.baseVal.value]];
+           icon.selectAll('use').attr('href', '#' + picon + suffix);
          }
 
-         return [[0, 0], [e.clientWidth, e.clientHeight]];
-       }
+         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.
 
-       function defaultWheelDelta$1(d3_event) {
-         return -d3_event.deltaY * (d3_event.deltaMode === 1 ? 0.05 : d3_event.deltaMode ? 1 : 0.002);
-       }
 
-       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 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 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;
+         function render() {
+           var p = _preset.apply(this, arguments);
 
-         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);
-         }
+           var geom = _geometry ? _geometry.apply(this, arguments) : null;
 
-         zoom.transform = function (collection, transform, point) {
-           var selection = collection.selection ? collection.selection() : collection;
+           if (geom === 'relation' && p.tags && (p.tags.type === 'route' && p.tags.route && routeSegments[p.tags.route] || p.tags.type === 'waterway')) {
+             geom = 'route';
+           }
 
-           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);
-             });
+           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) : {};
+
+           for (var k in tags) {
+             if (tags[k] === '*') {
+               tags[k] = 'yes';
+             }
            }
-         };
 
-         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);
-         };
+           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);
+         }
 
-         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);
+         presetIcon.preset = function (val) {
+           if (!arguments.length) return _preset;
+           _preset = utilFunctor(val);
+           return presetIcon;
          };
 
-         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);
-           });
+         presetIcon.geometry = function (val) {
+           if (!arguments.length) return _geometry;
+           _geometry = utilFunctor(val);
+           return presetIcon;
          };
 
-         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);
+         presetIcon.sizeClass = function (val) {
+           if (!arguments.length) return _sizeClass;
+           _sizeClass = val;
+           return presetIcon;
          };
 
-         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 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);
-         }
+         return presetIcon;
+       }
 
-         function centroid(extent) {
-           return [(+extent[0][0] + +extent[1][0]) / 2, (+extent[0][1] + +extent[1][1]) / 2];
-         }
+       function uiSectionFeatureType(context) {
+         var dispatch = dispatch$8('choose');
+         var _entityIDs = [];
+         var _presets = [];
 
-         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);
-             };
-           });
-         }
+         var _tagReference;
 
-         function gesture(that, args, clean) {
-           return !clean && _activeGesture || new Gesture(that, args);
-         }
+         var section = uiSection('feature-type', context).label(_t.html('inspector.feature_type')).disclosureContent(renderDisclosureContent);
 
-         function Gesture(that, args) {
-           this.that = that;
-           this.args = args;
-           this.active = 0;
-           this.extent = extent.apply(that, args);
-         }
+         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
 
-         Gesture.prototype = {
-           start: function start(d3_event) {
-             if (++this.active === 1) {
-               _activeGesture = this;
-               dispatch$1.call('start', this, d3_event);
-             }
+           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);
+           }
 
-             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);
-             }
+           selection.selectAll('.preset-reset').on('click', function () {
+             dispatch.call('choose', this, _presets);
+           }).on('pointerdown pointerup mousedown mouseup', function (d3_event) {
+             d3_event.preventDefault();
+             d3_event.stopPropagation();
+           });
+           var geometries = entityGeometries();
+           selection.select('.preset-list-item button').call(uiPresetIcon().geometry(_presets.length === 1 ? geometries.length === 1 && geometries[0] : null).preset(_presets.length === 1 ? _presets[0] : _mainPresetIndex.item('point')));
+           var names = _presets.length === 1 ? [_presets[0].nameLabel(), _presets[0].subtitleLabel()].filter(Boolean) : [_t('inspector.multiple_types')];
+           var label = selection.select('.label-inner');
+           var nameparts = label.selectAll('.namepart').data(names, function (d) {
+             return d;
+           });
+           nameparts.exit().remove();
+           nameparts.enter().append('div').attr('class', 'namepart').html(function (d) {
+             return d;
+           });
+         }
 
-             return this;
-           }
+         section.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
+           _entityIDs = val;
+           return section;
          };
 
-         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.
+         section.presets = function (val) {
+           if (!arguments.length) return _presets; // don't reload the same preset
 
-           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 (!utilArrayIdentical(val, _presets)) {
+             _presets = val;
 
-             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);
+             if (_presets.length === 1) {
+               _tagReference = uiTagReference(_presets[0].reference()).showing(false);
+             }
            }
 
-           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));
+           return section;
+         };
 
-           function wheelidled() {
-             g.wheel = null;
-             g.end(d3_event);
-           }
-         }
+         function entityGeometries() {
+           var counts = {};
 
-         var _downPointerIDs = new Set();
+           for (var i in _entityIDs) {
+             var geometry = context.graph().geometry(_entityIDs[i]);
+             if (!counts[geometry]) counts[geometry] = 0;
+             counts[geometry] += 1;
+           }
 
-         var _pointerLocGetter;
+           return Object.keys(counts).sort(function (geom1, geom2) {
+             return counts[geom2] - counts[geom1];
+           });
+         }
 
-         function pointerdown(d3_event) {
-           _downPointerIDs.add(d3_event.pointerId);
+         return utilRebind(section, dispatch, 'on');
+       }
 
-           if (!filter.apply(this, arguments)) return;
-           var g = gesture(this, arguments, _downPointerIDs.size === 1);
-           var started;
-           d3_event.stopImmediatePropagation();
-           _pointerLocGetter = utilFastMouse(this);
+       // It borrows some code from uiHelp
 
-           var loc = _pointerLocGetter(d3_event);
+       function uiFieldHelp(context, fieldName) {
+         var fieldHelp = {};
 
-           var p = [loc, _transform.invert(loc), d3_event.pointerId];
+         var _inspector = select(null);
 
-           if (!g.pointer0) {
-             g.pointer0 = p;
-             started = true;
-           } else if (!g.pointer1 && g.pointer0[2] !== p[2]) {
-             g.pointer1 = p;
-           }
+         var _wrap = select(null);
 
-           if (started) {
-             interrupt(this);
-             g.start(d3_event);
-           }
-         }
+         var _body = select(null);
 
-         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 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 ((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;
-           }
+         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?
 
-           d3_event.preventDefault();
-           d3_event.stopImmediatePropagation();
+             var hhh = depth ? Array(depth + 1).join('#') + ' ' : ''; // if so, prepend with some ##'s
 
-           var loc = _pointerLocGetter(d3_event);
+             return all + hhh + _t.html(subkey, replacements) + '\n\n';
+           }, '');
+           return {
+             key: helpkey,
+             title: _t.html(helpkey + '.title'),
+             html: marked_1(text.trim())
+           };
+         });
 
-           var t, p, l;
-           if (isPointer0) g.pointer0[0] = loc;else if (isPointer1) g.pointer1[0] = loc;
-           t = _transform;
+         function show() {
+           updatePosition();
 
-           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;
+           _body.classed('hide', false).style('opacity', '0').transition().duration(200).style('opacity', '1');
+         }
 
-           g.zoom(d3_event, 'touch', constrain(translate(t, p, l), g.extent, translateExtent));
+         function hide() {
+           _body.classed('hide', true).transition().duration(200).style('opacity', '0').on('end', function () {
+             _body.classed('hide', true);
+           });
          }
 
-         function pointerup(d3_event) {
-           if (!_downPointerIDs.has(d3_event.pointerId)) return;
+         function clickHelp(index) {
+           var d = docs[index];
+           var tkeys = fieldHelpKeys[fieldName][index][1];
 
-           _downPointerIDs["delete"](d3_event.pointerId);
+           _body.selectAll('.field-help-nav-item').classed('active', function (d, i) {
+             return i === index;
+           });
 
-           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;
+           var content = _body.selectAll('.field-help-content').html(d.html); // class the paragraphs so we can find and style them
 
-           if (g.pointer1 && !g.pointer0) {
-             g.pointer0 = g.pointer1;
-             delete g.pointer1;
-           }
 
-           if (g.pointer0) g.pointer0[1] = _transform.invert(g.pointer0[0]);else {
-             g.end(d3_event);
+           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'));
            }
          }
 
-         zoom.wheelDelta = function (_) {
-           return arguments.length ? (wheelDelta = utilFunctor(+_), zoom) : wheelDelta;
-         };
+         fieldHelp.button = function (selection) {
+           if (_body.empty()) return;
+           var button = selection.selectAll('.field-help-button').data([0]); // enter/update
 
-         zoom.filter = function (_) {
-           return arguments.length ? (filter = utilFunctor(!!_), zoom) : filter;
-         };
+           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();
 
-         zoom.extent = function (_) {
-           return arguments.length ? (extent = utilFunctor([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), zoom) : extent;
+             if (_body.classed('hide')) {
+               show();
+             } else {
+               hide();
+             }
+           });
          };
 
-         zoom.scaleExtent = function (_) {
-           return arguments.length ? (scaleExtent[0] = +_[0], scaleExtent[1] = +_[1], zoom) : [scaleExtent[0], scaleExtent[1]];
-         };
+         function updatePosition() {
+           var wrap = _wrap.node();
 
-         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]]];
-         };
+           var inspector = _inspector.node();
 
-         zoom.constrain = function (_) {
-           return arguments.length ? (constrain = _, zoom) : constrain;
-         };
+           var wRect = wrap.getBoundingClientRect();
+           var iRect = inspector.getBoundingClientRect();
 
-         zoom.interpolate = function (_) {
-           return arguments.length ? (interpolate = _, zoom) : interpolate;
-         };
+           _body.style('top', wRect.top + inspector.scrollTop - iRect.top + 'px');
+         }
 
-         zoom._transform = function (_) {
-           return arguments.length ? (_transform = _, zoom) : _transform;
+         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
+
+           _inspector = context.container().select('.sidebar .entity-editor-pane .inspector-body');
+           if (_inspector.empty()) return;
+           _body = _inspector.selectAll('.field-help-body').data([0]);
+
+           var enter = _body.enter().append('div').attr('class', 'field-help-body hide'); // initially hidden
+
+
+           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 utilRebind(zoom, dispatch$1, 'on');
+         return fieldHelp;
        }
 
-       // if pointer events are supported. Falls back to default `dblclick` event.
-
-       function utilDoubleUp() {
-         var dispatch$1 = dispatch('doubleUp');
-         var _maxTimespan = 500; // milliseconds
+       function uiFieldCheck(field, context) {
+         var dispatch = dispatch$8('change');
+         var options = field.options;
+         var values = [];
+         var texts = [];
 
-         var _maxDistance = 20; // web pixels; be somewhat generous to account for touch devices
+         var _tags;
 
-         var _pointer; // object representing the pointer that could trigger double up
+         var input = select(null);
+         var text = select(null);
+         var label = select(null);
+         var reverser = select(null);
 
+         var _impliedYes;
 
-         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 _entityIDs = [];
 
-         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 _value;
 
-           if (_pointer && !pointerIsValidFor(loc)) {
-             // if this pointer is no longer valid, clear it so another can be started
-             _pointer = undefined;
+         if (options) {
+           for (var i in options) {
+             var v = options[i];
+             values.push(v === 'undefined' ? undefined : v);
+             texts.push(field.t.html('options.' + v, {
+               'default': v
+             }));
            }
+         } else {
+           values = [undefined, 'yes'];
+           texts = [_t.html('inspector.unknown'), _t.html('inspector.check.yes')];
 
-           if (!_pointer) {
-             _pointer = {
-               startLoc: loc,
-               startTime: new Date().getTime(),
-               upCount: 0,
-               pointerId: d3_event.pointerId
-             };
-           } else {
-             // double down
-             _pointer.pointerId = d3_event.pointerId;
+           if (field.type !== 'defaultCheck') {
+             values.push('no');
+             texts.push(_t.html('inspector.check.no'));
            }
-         }
-
-         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;
+         } // Checks tags to see whether an undefined value is "Assumed to be Yes"
 
-           if (_pointer.upCount === 2) {
-             // double up!
-             var loc = [d3_event.clientX, d3_event.clientY];
 
-             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 checkImpliedYes() {
+           _impliedYes = field.id === 'oneway_yes'; // hack: pretend `oneway` field is a `oneway_yes` field
+           // where implied oneway tag exists (e.g. `junction=roundabout`) #2220, #1841
 
+           if (field.id === 'oneway') {
+             var entity = context.entity(_entityIDs[0]);
 
-             _pointer = undefined;
+             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 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));
-             });
-           }
+         function reverserHidden() {
+           if (!context.container().select('div.inspector-hover').empty()) return true;
+           return !(_value === 'yes' || _impliedYes && !_value);
          }
 
-         doubleUp.off = function (selection) {
-           selection.on('pointerdown.doubleUp', null).on('pointerup.doubleUp', null).on('dblclick.doubleUp', null);
-         };
+         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;
+         }
 
-         return utilRebind(doubleUp, dispatch$1, 'on');
-       }
+         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');
 
-       var TILESIZE = 256;
-       var minZoom = 2;
-       var maxZoom = 24;
-       var kMin = geoZoomToScale(minZoom, TILESIZE);
-       var kMax = geoZoomToScale(maxZoom, TILESIZE);
+           if (field.type === 'onewayCheck') {
+             enter.append('button').attr('class', 'reverser' + (reverserHidden() ? ' hide' : '')).append('span').attr('class', 'reverser-span');
+           }
 
-       function clamp(num, min, max) {
-         return Math.max(min, Math.min(num, max));
-       }
+           label = label.merge(enter);
+           input = label.selectAll('input');
+           text = label.selectAll('span.value');
+           input.on('click', function (d3_event) {
+             d3_event.stopPropagation();
+             var t = {};
 
-       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 (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 _selection = select(null);
 
-         var supersurface = select(null);
-         var wrapper = select(null);
-         var surface = select(null);
-         var _dimensions = [1, 1];
-         var _dblClickZoomEnabled = true;
-         var _redrawEnabled = true;
+             if (t[field.key] === 'reversible' || t[field.key] === 'alternating') {
+               t[field.key] = values[0];
+             }
 
-         var _gestureTransformStart;
+             dispatch.call('change', this, t);
+           });
 
-         var _transformStart = projection.transform();
+           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);
+                 }
 
-         var _transformLast;
+                 return graph;
+               }, _t('operations.reverse.annotation.line', {
+                 n: 1
+               })); // must manually revalidate since no 'change' event was called
 
-         var _isTransformed = false;
-         var _minzoom = 0;
+               context.validator().validate();
+               select(this).call(reverserSetText);
+             });
+           }
+         };
 
-         var _getMouseCoords;
+         check.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
+           _entityIDs = val;
+           return check;
+         };
 
-         var _lastPointerEvent;
+         check.tags = function (tags) {
+           _tags = tags;
 
-         var _lastWithinEditableZoom; // whether a pointerdown event started the zoom
+           function isChecked(val) {
+             return val !== 'no' && val !== '' && val !== undefined && val !== null;
+           }
 
+           function textFor(val) {
+             if (val === '') val = undefined;
+             var index = values.indexOf(val);
+             return index !== -1 ? texts[index] : '"' + val + '"';
+           }
 
-         var _pointerDown = false; // use pointer events on supported platforms; fallback to mouse events
+           checkImpliedYes();
+           var isMixed = Array.isArray(tags[field.key]);
+           _value = !isMixed && tags[field.key] && tags[field.key].toLowerCase();
 
-         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse'; // use pointer event interaction if supported; fallback to touch/mouse events in d3-zoom
+           if (field.type === 'onewayCheck' && (_value === '1' || _value === '-1')) {
+             _value = 'yes';
+           }
 
+           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);
 
-         var _zoomerPannerFunction = 'PointerEvent' in window ? utilZoomPan : d3_zoom;
+           if (field.type === 'onewayCheck') {
+             reverser.classed('hide', reverserHidden()).call(reverserSetText);
+           }
+         };
 
-         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;
-         });
+         check.focus = function () {
+           input.node().focus();
+         };
 
-         var _doubleUpHandler = utilDoubleUp();
+         return utilRebind(check, dispatch, 'on');
+       }
 
-         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 uiFieldCombo(field, context) {
+         var dispatch = dispatch$8('change');
 
+         var _isMulti = field.type === 'multiCombo' || field.type === 'manyCombo';
 
-         function cancelPendingRedraw() {
-           scheduleRedraw.cancel(); // isRedrawScheduled = false;
-           // window.cancelIdleCallback(pendingRedrawCall);
-         }
+         var _isNetwork = field.type === 'networkCombo';
 
-         function map(selection) {
-           _selection = selection;
-           context.on('change.map', immediateRedraw);
-           var osm = context.connection();
+         var _isSemi = field.type === 'semiCombo';
 
-           if (osm) {
-             osm.on('change.map', immediateRedraw);
-           }
+         var _optarray = field.options;
 
-           function didUndoOrRedo(targetTransform) {
-             var mode = context.mode().id;
-             if (mode !== 'browse' && mode !== 'select') return;
+         var _showTagInfoSuggestions = field.type !== 'manyCombo' && field.autoSuggestions !== false;
 
-             if (targetTransform) {
-               map.transformEase(targetTransform);
-             }
-           }
+         var _allowCustomValues = field.type !== 'manyCombo' && field.customValues !== false;
 
-           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 _snake_case = field.snake_case || field.snake_case === undefined;
+
+         var _combobox = uiCombobox(context, 'combo-' + field.safeid).caseSensitive(field.caseSensitive).minItems(_isMulti || _isSemi ? 1 : 2);
+
+         var _container = select(null);
+
+         var _inputWrap = select(null);
+
+         var _input = select(null);
+
+         var _comboData = [];
+         var _multiData = [];
+         var _entityIDs = [];
 
-           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
+         var _tags;
 
-           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;
+         var _countryCode;
 
-             if (d3_event.button === 2) {
-               d3_event.stopPropagation();
-             }
-           }, true).on(_pointerPrefix + 'up.zoom', function (d3_event) {
-             _lastPointerEvent = d3_event;
+         var _staticPlaceholder; // initialize deprecated tags array
 
-             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 ('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
+         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 += ':';
+         }
 
-           updateAreaFill();
+         function snake(s) {
+           return s.replace(/\s+/g, '_').toLowerCase();
+         }
 
-           _doubleUpHandler.on('doubleUp.map', function (d3_event, p0) {
-             if (!_dblClickZoomEnabled) return; // don't zoom if targeting something other than the map itself
+         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 (_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);
+
+         function tagValue(dval) {
+           dval = clean(dval || '');
+
+           var found = _comboData.find(function (o) {
+             return o.key && clean(o.value) === dval;
            });
 
-           context.on('enter.map', function () {
-             if (!map.editableDataEnabled(true
-             /* skip zoom check */
-             )) return; // redraw immediately any objects affected by a change in selectedIDs.
+           if (found) return found.key;
 
-             var graph = context.graph();
-             var selectedAndParents = {};
-             context.selectedIDs().forEach(function (id) {
-               var entity = graph.hasEntity(id);
+           if (field.type === 'typeCombo' && !dval) {
+             return 'yes';
+           }
 
-               if (entity) {
-                 selectedAndParents[entity.id] = entity;
+           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)
 
-                 if (entity.type === 'node') {
-                   graph.parentWays(entity).forEach(function (parent) {
-                     selectedAndParents[parent.id] = parent;
-                   });
-                 }
-               }
+
+         function displayValue(tval) {
+           tval = tval || '';
+
+           if (field.hasTextForStringId('options.' + tval)) {
+             return field.t('options.' + tval, {
+               "default": tval
              });
-             var data = Object.values(selectedAndParents);
+           }
 
-             var filter = function filter(d) {
-               return d.id in selectedAndParents;
-             };
+           if (field.type === 'typeCombo' && tval.toLowerCase() === 'yes') {
+             return '';
+           }
 
-             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
+           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}]
+         //
 
-             scheduleRedraw();
+
+         function objectDifference(a, b) {
+           return a.filter(function (d1) {
+             return !b.some(function (d2) {
+               return !d2.isMixed && d1.value === d2.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;
+         function initCombo(selection, attachTo) {
+           if (!_allowCustomValues) {
+             selection.attr('readonly', 'readonly');
+           }
 
-             for (var i = 0; i < listeners.length; i++) {
-               var listener = listeners[i];
+           if (_showTagInfoSuggestions && services.taginfo) {
+             selection.call(_combobox.fetcher(setTaginfoValues), attachTo);
+             setTaginfoValues('', setPlaceholder);
+           } else {
+             selection.call(_combobox, attachTo);
+             setStaticValues(setPlaceholder);
+           }
+         }
 
-               if (listener.name === 'zoom' && listener.type === 'mouseup') {
-                 hasOrphan = true;
-                 break;
-               }
-             }
+         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'
+             };
+           });
 
-             if (hasOrphan) {
-               var event = window.CustomEvent;
+           _combobox.data(objectDifference(_comboData, _multiData));
 
-               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.
+           if (callback) callback(_comboData);
+         }
 
+         function setTaginfoValues(q, callback) {
+           var fn = _isMulti ? 'multikeys' : 'values';
+           var query = (_isMulti ? field.key : '') + q;
+           var hasCountryPrefix = _isNetwork && _countryCode && _countryCode.indexOf(q.toLowerCase()) === 0;
 
-               event.view = window;
-               window.dispatchEvent(event);
-             }
+           if (hasCountryPrefix) {
+             query = _countryCode + ':';
            }
 
-           return d3_event.button !== 2; // ignore right clicks
-         }
+           var params = {
+             debounce: q !== '',
+             key: field.key,
+             query: query
+           };
 
-         function pxCenter() {
-           return [_dimensions[0] / 2, _dimensions[1] / 2];
-         }
+           if (_entityIDs.length) {
+             params.geometry = context.graph().geometry(_entityIDs[0]);
+           }
 
-         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;
+           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
 
-           if (map.isInWideSelection()) {
-             data = [];
-             utilEntityAndDeepMemberIDs(mode.selectedIDs(), context.graph()).forEach(function (id) {
-               var entity = context.hasEntity(id);
-               if (entity) data.push(entity);
+
+               return !d.count || d.count > 10;
              });
-             fullRedraw = true;
-             filter = utilFunctor(true); // selected features should always be visible, so we can skip filtering
+             var deprecatedValues = osmEntity.deprecatedTagValuesByKey(_dataDeprecated)[field.key];
 
-             applyFeatureLayerFilters = false;
-           } else if (difference) {
-             var complete = difference.complete(map.extent());
-             data = Object.values(complete).filter(Boolean);
-             set = new Set(Object.keys(complete));
+             if (deprecatedValues) {
+               // don't suggest deprecated tag values
+               data = data.filter(function (d) {
+                 return deprecatedValues.indexOf(d.value) === -1;
+               });
+             }
 
-             filter = function filter(d) {
-               return set.has(d.id);
-             };
+             if (hasCountryPrefix) {
+               data = data.filter(function (d) {
+                 return d.value.toLowerCase().indexOf(_countryCode + ':') === 0;
+               });
+             } // hide the caret if there are no suggestions
 
-             features.clear(data);
-           } else {
-             // force a full redraw if gatherStats detects that a feature
-             // should be auto-hidden (e.g. points or buildings)..
-             if (features.gatherStats(all, graph, _dimensions)) {
-               extent = undefined;
-             }
 
-             if (extent) {
-               data = context.history().intersects(map.extent().intersection(extent));
-               set = new Set(data.map(function (entity) {
-                 return entity.id;
-               }));
+             _container.classed('empty-combobox', data.length === 0);
 
-               filter = function filter(d) {
-                 return set.has(d.id);
+             _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'
                };
-             } else {
-               data = all;
-               fullRedraw = true;
-               filter = utilFunctor(true);
-             }
-           }
+             });
+             _comboData = objectDifference(_comboData, _multiData);
+             if (callback) callback(_comboData);
+           });
+         }
 
-           if (applyFeatureLayerFilters) {
-             data = features.filter(data, graph);
+         function setPlaceholder(values) {
+           if (_isMulti || _isSemi) {
+             _staticPlaceholder = field.placeholder() || _t('inspector.add');
            } else {
-             context.features().resetStats();
+             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 (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 (!/(…|\.\.\.)$/.test(_staticPlaceholder)) {
+             _staticPlaceholder += '…';
            }
 
-           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
-           });
+           var ph;
+
+           if (!_isMulti && !_isSemi && _tags && Array.isArray(_tags[field.key])) {
+             ph = _t('inspector.multiple_values');
+           } else {
+             ph = _staticPlaceholder;
+           }
+
+           _container.selectAll('input').attr('placeholder', ph);
          }
 
-         map.init = function () {
-           drawLayers = svgLayers(projection, context);
-           drawPoints = svgPoints(projection, context);
-           drawVertices = svgVertices(projection, context);
-           drawLines = svgLines(projection, context);
-           drawAreas = svgAreas(projection, context);
-           drawMidpoints = svgMidpoints(projection, context);
-           drawLabels = svgLabels(projection, context);
-         };
+         function change() {
+           var t = {};
+           var val;
 
-         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 (_isMulti || _isSemi) {
+             val = tagValue(utilGetSetValue(_input).replace(/,/g, ';')) || '';
 
-           if (mode && !allowed[mode.id]) {
-             context.enter(modeBrowse(context));
-           }
+             _container.classed('active', false);
 
-           dispatch$1.call('drawn', this, {
-             full: true
-           });
-         }
+             utilGetSetValue(_input, '');
+             var vals = val.split(';').filter(Boolean);
+             if (!vals.length) return;
 
-         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
+             if (_isMulti) {
+               utilArrayUniq(vals).forEach(function (v) {
+                 var key = (field.key || '') + v;
 
-           e2._rotation = e.rotation; // preserve the original rotation
+                 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;
+                 }
 
-           _selection.node().dispatchEvent(e2);
-         }
+                 key = context.cleanTagKey(key);
+                 field.keys.push(key);
+                 t[key] = 'yes';
+               });
+             } else if (_isSemi) {
+               var arr = _multiData.map(function (d) {
+                 return d.key;
+               });
 
-         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.
+               arr = arr.concat(vals);
+               t[field.key] = context.cleanTagValue(utilArrayUniq(arr).filter(Boolean).join(';'));
+             }
 
-           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
+             window.setTimeout(function () {
+               _input.node().focus();
+             }, 10);
+           } else {
+             var rawValue = utilGetSetValue(_input); // don't override multiple values with blank string
 
-             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 (!rawValue && Array.isArray(_tags[field.key])) return;
+             val = context.cleanTagValue(tagValue(rawValue));
+             t[field.key] = val || undefined;
+           }
 
-                 if (detected.os !== 'mac') {
-                   dY *= 5;
-                 } // recalculate x2,y2,k2
+           dispatch.call('change', this, t);
+         }
 
+         function removeMultikey(d3_event, d) {
+           d3_event.preventDefault();
+           d3_event.stopPropagation();
+           var t = {};
 
-                 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
+           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);
 
-               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
+             arr = utilArrayUniq(arr);
+             t[field.key] = arr.length ? arr.join(';') : undefined;
+           }
 
+           dispatch.call('change', this, t);
+         }
 
-             if (x2 !== x || y2 !== y || k2 !== k) {
-               x = x2;
-               y = y2;
-               k = k2;
-               eventTransform = identity$2.translate(x2, y2).scale(k2);
+         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);
 
-               if (_zoomerPanner._transform) {
-                 // utilZoomPan interface
-                 _zoomerPanner._transform(eventTransform);
-               } else {
-                 // d3_zoom interface
-                 _selection.node().__zoom = eventTransform;
-               }
+           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]);
            }
 
-           if (_transformStart.x === x && _transformStart.y === y && _transformStart.k === k) {
-             return; // no change
+           _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();
            }
 
-           var withinEditableZoom = map.withinEditableZoom();
+           _input.on('change', change).on('blur', change);
 
-           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);
-             }
+           _input.on('keydown.field', function (d3_event) {
+             switch (d3_event.keyCode) {
+               case 13:
+                 // ↩ Return
+                 _input.node().blur(); // blurring also enters the value
 
-             _lastWithinEditableZoom = withinEditableZoom;
-           }
 
-           if (geoScaleToZoom(k, TILESIZE) < _minzoom) {
-             surface.interrupt();
-             dispatch$1.call('hitMinZoom', this, map);
-             setCenterZoom(map.center(), context.minEditableZoom(), 0, true);
-             scheduleRedraw();
-             dispatch$1.call('move', this, map);
-             return;
-           }
+                 d3_event.stopPropagation();
+                 break;
+             }
+           });
 
-           projection.transform(eventTransform);
-           var scale = k / _transformStart.k;
-           var tX = (x / scale - _transformStart.x) * scale;
-           var tY = (y / scale - _transformStart.y) * scale;
+           if (_isMulti || _isSemi) {
+             _combobox.on('accept', function () {
+               _input.node().blur();
 
-           if (context.inIntro()) {
-             curtainProjection.transform({
-               x: x - tX,
-               y: y - tY,
-               k: k
+               _input.node().focus();
              });
-           }
 
-           if (source) {
-             _lastPointerEvent = event;
+             _input.on('focus', function () {
+               _container.classed('active', true);
+             });
            }
+         }
 
-           _isTransformed = true;
-           _transformLast = eventTransform;
-           utilSetTransform(supersurface, tX, tY, scale);
-           scheduleRedraw();
-           dispatch$1.call('move', this, map);
+         combo.tags = function (tags) {
+           _tags = tags;
 
-           function isInteger(val) {
-             return typeof val === 'number' && isFinite(val) && Math.floor(val) === val;
-           }
-         }
+           if (_isMulti || _isSemi) {
+             _multiData = [];
+             var maxLength;
 
-         function resetTransform() {
-           if (!_isTransformed) return false;
-           utilSetTransform(supersurface, 0, 0);
-           _isTransformed = false;
+             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;
 
-           if (context.inIntro()) {
-             curtainProjection.transform(projection.transform());
-           }
+                 _multiData.push({
+                   key: k,
+                   value: displayValue(suffix),
+                   isMixed: Array.isArray(v)
+                 });
+               }
 
-           return true;
-         }
+               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 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.
+                 maxLength = context.maxCharsForTagKey() - utilUnicodeCharsCount(field.key);
+               } else {
+                 maxLength = context.maxCharsForTagKey();
+               }
+             } else if (_isSemi) {
+               var allValues = [];
+               var commonValues;
 
-           if (resetTransform()) {
-             difference = extent = undefined;
-           }
+               if (Array.isArray(tags[field.key])) {
+                 tags[field.key].forEach(function (tagVal) {
+                   var thisVals = utilArrayUniq((tagVal || '').split(';')).filter(Boolean);
+                   allValues = allValues.concat(thisVals);
 
-           var zoom = map.zoom();
-           var z = String(~~zoom);
+                   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;
+               }
 
-           if (surface.attr('data-zoom') !== z) {
-             surface.attr('data-zoom', z);
-           } // class surface as `lowzoom` around z17-z18.5 (based on latitude)
+               _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
 
+               maxLength = context.maxCharsForTagValue() - currLength;
 
-           var lat = map.center()[1];
-           var lowzoom = linear$2().domain([-60, 0, 60]).range([17, 18.5, 17]).clamp(true);
-           surface.classed('low-zoom', zoom <= lowzoom(lat));
+               if (currLength > 0) {
+                 // account for the separator if a new value will be appended to existing
+                 maxLength -= 1;
+               }
+             } // a negative maxlength doesn't make sense
 
-           if (!difference) {
-             supersurface.call(context.background());
-             wrapper.call(drawLayers);
-           } // OSM
 
+             maxLength = Math.max(0, maxLength);
+             var allowDragAndDrop = _isSemi // only semiCombo values are ordered
+             && !Array.isArray(tags[field.key]); // Exclude existing multikeys from combo options..
+
+             var available = objectDifference(_comboData, _multiData);
 
-           if (map.editableDataEnabled() || map.isInWideSelection()) {
-             context.loadTiles(projection);
-             drawEditable(difference, extent);
-           } else {
-             editOff();
-           }
+             _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
 
-           _transformStart = projection.transform();
-           return map;
-         }
 
-         var immediateRedraw = function immediateRedraw(difference, extent) {
-           if (!difference && !extent) cancelPendingRedraw();
-           redraw(difference, extent);
-         };
+             var hideAdd = !_allowCustomValues && !available.length || maxLength <= 0;
 
-         map.lastPointerEvent = function () {
-           return _lastPointerEvent;
-         };
+             _container.selectAll('.chiplist .input-wrap').style('display', hideAdd ? 'none' : null); // Render chips
 
-         map.mouse = function (d3_event) {
-           var event = _lastPointerEvent || d3_event;
 
-           if (event) {
-             var s;
+             var chips = _container.selectAll('.chip').data(_multiData);
 
-             while (s = event.sourceEvent) {
-               event = s;
+             chips.exit().remove();
+             var enter = chips.enter().insert('li', '.input-wrap').attr('class', 'chip');
+             enter.append('span');
+             enter.append('a');
+             chips = chips.merge(enter).order().classed('raw-value', function (d) {
+               var k = d.key;
+               if (_isMulti) k = k.replace(field.key, '');
+               return !field.hasTextForStringId('options.' + k);
+             }).classed('draggable', allowDragAndDrop).classed('mixed', function (d) {
+               return d.isMixed;
+             }).attr('title', function (d) {
+               return d.isMixed ? _t('inspector.unshared_value_tooltip') : null;
+             });
+
+             if (allowDragAndDrop) {
+               registerDragAndDrop(chips);
              }
 
-             return _getMouseCoords(event);
+             chips.select('span').html(function (d) {
+               return d.value;
+             });
+             chips.select('a').attr('href', '#').on('click', removeMultikey).attr('class', 'remove').html('×');
+           } else {
+             var isMixed = Array.isArray(tags[field.key]);
+             var mixedValues = isMixed && tags[field.key].map(function (val) {
+               return displayValue(val);
+             }).filter(Boolean);
+             var showsValue = !isMixed && tags[field.key] && !(field.type === 'typeCombo' && tags[field.key] === 'yes');
+             var isRawValue = showsValue && !field.hasTextForStringId('options.' + tags[field.key]);
+             var isKnownValue = showsValue && !isRawValue;
+             var isReadOnly = !_allowCustomValues || isKnownValue;
+             utilGetSetValue(_input, !isMixed ? displayValue(tags[field.key]) : '').classed('raw-value', isRawValue).classed('known-value', isKnownValue).attr('readonly', isReadOnly ? 'readonly' : undefined).attr('title', isMixed ? mixedValues.join('\n') : undefined).attr('placeholder', isMixed ? _t('inspector.multiple_values') : _staticPlaceholder || '').classed('mixed', isMixed).on('keydown.deleteCapture', function (d3_event) {
+               if (isReadOnly && isKnownValue && (d3_event.keyCode === utilKeybinding.keyCodes['⌫'] || d3_event.keyCode === utilKeybinding.keyCodes['⌦'])) {
+                 d3_event.preventDefault();
+                 d3_event.stopPropagation();
+                 var t = {};
+                 t[field.key] = undefined;
+                 dispatch.call('change', this, t);
+               }
+             });
            }
+         };
 
-           return null;
-         }; // returns Lng/Lat
+         function registerDragAndDrop(selection) {
+           // allow drag and drop re-ordering of chips
+           var dragOrigin, targetIndex;
+           selection.call(d3_drag().on('start', function (d3_event) {
+             dragOrigin = {
+               x: d3_event.x,
+               y: d3_event.y
+             };
+             targetIndex = null;
+           }).on('drag', function (d3_event) {
+             var x = d3_event.x - dragOrigin.x,
+                 y = d3_event.y - dragOrigin.y;
+             if (!select(this).classed('dragging') && // don't display drag until dragging beyond a distance threshold
+             Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2)) <= 5) return;
+             var index = selection.nodes().indexOf(this);
+             select(this).classed('dragging', true);
+             targetIndex = null;
+             var targetIndexOffsetTop = null;
+             var draggedTagWidth = select(this).node().offsetWidth;
 
+             if (field.key === 'destination' || field.key === 'via') {
+               // meaning tags are full width
+               _container.selectAll('.chip').style('transform', function (d2, index2) {
+                 var node = select(this).node();
 
-         map.mouseCoordinates = function () {
-           var coord = map.mouse() || pxCenter();
-           return projection.invert(coord);
-         };
+                 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;
+                   }
 
-         map.dblclickZoomEnable = function (val) {
-           if (!arguments.length) return _dblClickZoomEnabled;
-           _dblClickZoomEnabled = val;
-           return map;
-         };
+                   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;
+                   }
 
-         map.redrawEnable = function (val) {
-           if (!arguments.length) return _redrawEnabled;
-           _redrawEnabled = val;
-           return map;
-         };
+                   return 'translateY(100%)';
+                 }
 
-         map.isTransformed = function () {
-           return _isTransformed;
-         };
+                 return null;
+               });
+             } else {
+               _container.selectAll('.chip').each(function (d2, index2) {
+                 var node = select(this).node(); // check the cursor is in the bounding box
 
-         function setTransform(t2, duration, force) {
-           var t = projection.transform();
-           if (!force && t2.k === t.k && t2.x === t.x && t2.y === t.y) return false;
+                 if (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 (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;
+                 if (index === index2) {
+                   return 'translate(' + x + 'px, ' + y + 'px)';
+                 } // only translate tags in the same row
 
-             _selection.call(_zoomerPanner.transform, _transformStart);
-           }
 
-           return true;
-         }
+                 if (node.offsetTop === targetIndexOffsetTop) {
+                   if (index2 < index && index2 >= targetIndex) {
+                     return 'translateX(' + draggedTagWidth + 'px)';
+                   } else if (index2 > index && index2 <= targetIndex) {
+                     return 'translateX(-' + draggedTagWidth + 'px)';
+                   }
+                 }
 
-         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 null;
+               });
+             }
+           }).on('end', function () {
+             if (!select(this).classed('dragging')) {
+               return;
+             }
 
-           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);
-         }
+             var index = selection.nodes().indexOf(this);
+             select(this).classed('dragging', false);
 
-         map.pan = function (delta, duration) {
-           var t = projection.translate();
-           var k = projection.scale();
-           t[0] += delta[0];
-           t[1] += delta[1];
+             _container.selectAll('.chip').style('transform', null);
 
-           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();
+             if (typeof targetIndex === 'number') {
+               var element = _multiData[index];
 
-             _selection.call(_zoomerPanner.transform, _transformStart);
+               _multiData.splice(index, 1);
 
-             dispatch$1.call('move', this, map);
-             immediateRedraw();
-           }
+               _multiData.splice(targetIndex, 0, element);
 
-           return map;
-         };
+               var t = {};
 
-         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;
-         };
+               if (_multiData.length) {
+                 t[field.key] = _multiData.map(function (element) {
+                   return element.key;
+                 }).join(';');
+               } else {
+                 t[field.key] = undefined;
+               }
 
-         function zoomIn(delta) {
-           setCenterZoom(map.center(), ~~map.zoom() + delta, 250, true);
-         }
+               dispatch.call('change', this, t);
+             }
 
-         function zoomOut(delta) {
-           setCenterZoom(map.center(), ~~map.zoom() - delta, 250, true);
+             dragOrigin = undefined;
+             targetIndex = undefined;
+           }));
          }
 
-         map.zoomIn = function () {
-           zoomIn(1);
+         combo.focus = function () {
+           _input.node().focus();
          };
 
-         map.zoomInFurther = function () {
-           zoomIn(4);
+         combo.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
+           _entityIDs = val;
+           return combo;
          };
 
-         map.canZoomIn = function () {
-           return map.zoom() < maxZoom;
-         };
+         function combinedEntityExtent() {
+           return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+         }
 
-         map.zoomOut = function () {
-           zoomOut(1);
-         };
+         return utilRebind(combo, dispatch, 'on');
+       }
 
-         map.zoomOutFurther = function () {
-           zoomOut(4);
-         };
+       function uiFieldText(field, context) {
+         var dispatch = dispatch$8('change');
+         var input = select(null);
+         var outlinkButton = select(null);
+         var _entityIDs = [];
 
-         map.canZoomOut = function () {
-           return map.zoom() > minZoom;
-         };
+         var _tags;
 
-         map.center = function (loc2) {
-           if (!arguments.length) {
-             return projection.invert(pxCenter());
-           }
+         var _phoneFormats = {};
 
-           if (setCenterZoom(loc2, map.zoom())) {
-             dispatch$1.call('move', this, map);
-           }
+         if (field.type === 'tel') {
+           _mainFileFetcher.get('phone_formats').then(function (d) {
+             _phoneFormats = d;
+             updatePhonePlaceholder();
+           })["catch"](function () {
+             /* ignore */
+           });
+         }
 
-           scheduleRedraw();
-           return map;
-         };
+         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
 
-         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
+             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
 
-           proj.scale(geoZoomToScale(zoom, TILESIZE));
-           var locPx = proj(loc);
-           var offsetLocPx = [locPx[0] + offset[0], locPx[1] + offset[1]];
-           var offsetLoc = proj.invert(offsetLocPx);
-           map.centerZoomEase(offsetLoc, zoom);
-         };
+             var which = field.id; // 'brand', 'network', 'operator', 'flag'
 
-         map.unobscuredOffsetPx = function () {
-           var openPane = context.container().select('.map-panes .map-pane.shown');
+             return isSuggestion && !!entity.tags[which] && !!entity.tags[which + ':wikidata'];
+           });
 
-           if (!openPane.empty()) {
-             return [openPane.node().offsetWidth / 2, 0];
-           }
+           field.locked(isLocked);
+         }
 
-           return [0, 0];
-         };
+         function i(selection) {
+           calcLocked();
+           var isLocked = field.locked();
+           var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+           wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
+           input = wrap.selectAll('input').data([0]);
+           input = input.enter().append('input').attr('type', field.type === 'identifier' || field.type === 'roadheight' ? '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());
 
-         map.zoom = function (z2) {
-           if (!arguments.length) {
-             return Math.max(geoScaleToZoom(projection.scale(), TILESIZE), 0);
-           }
+           if (field.type === 'tel') {
+             updatePhonePlaceholder();
+           } else if (field.type === 'number') {
+             var rtl = _mainLocalizer.textDirection() === 'rtl';
+             input.attr('type', 'text');
+             var inc = field.increment;
+             var buttons = wrap.selectAll('.increment, .decrement').data(rtl ? [inc, -inc] : [-inc, inc]);
+             buttons.enter().append('button').attr('class', function (d) {
+               var which = d > 0 ? 'increment' : 'decrement';
+               return 'form-field-button ' + which;
+             }).merge(buttons).on('click', function (d3_event, d) {
+               d3_event.preventDefault();
+               var raw_vals = input.node().value || '0';
+               var vals = raw_vals.split(';');
+               vals = vals.map(function (v) {
+                 var num = parseFloat(v.trim(), 10);
+                 return isFinite(num) ? clamped(num + d) : v.trim();
+               });
+               input.node().value = vals.join(';');
+               change()();
+             });
+           } else if (field.type === 'identifier' && field.urlFormat && field.pattern) {
+             input.attr('type', 'text');
+             outlinkButton = wrap.selectAll('.foreign-id-permalink').data([0]);
+             outlinkButton.enter().append('button').call(svgIcon('#iD-icon-out-link')).attr('class', 'form-field-button foreign-id-permalink').attr('title', function () {
+               var domainResults = /^https?:\/\/(.{1,}?)\//.exec(field.urlFormat);
 
-           if (z2 < _minzoom) {
-             surface.interrupt();
-             dispatch$1.call('hitMinZoom', this, map);
-             z2 = context.minEditableZoom();
-           }
+               if (domainResults.length >= 2 && domainResults[1]) {
+                 var domain = domainResults[1];
+                 return _t('icons.view_on', {
+                   domain: domain
+                 });
+               }
 
-           if (setCenterZoom(map.center(), z2)) {
-             dispatch$1.call('move', this, map);
+               return '';
+             }).on('click', function (d3_event) {
+               d3_event.preventDefault();
+               var value = validIdentifierValueForLink();
+
+               if (value) {
+                 var url = field.urlFormat.replace(/{value}/, encodeURIComponent(value));
+                 window.open(url, '_blank');
+               }
+             }).merge(outlinkButton);
            }
+         }
+
+         function updatePhonePlaceholder() {
+           if (input.empty() || !Object.keys(_phoneFormats).length) return;
+           var extent = combinedEntityExtent();
+           var countryCode = extent && iso1A2Code(extent.center());
 
-           scheduleRedraw();
-           return map;
-         };
+           var format = countryCode && _phoneFormats[countryCode.toLowerCase()];
 
-         map.centerZoom = function (loc2, z2) {
-           if (setCenterZoom(loc2, z2)) {
-             dispatch$1.call('move', this, map);
-           }
+           if (format) input.attr('placeholder', format);
+         }
 
-           scheduleRedraw();
-           return map;
-         };
+         function validIdentifierValueForLink() {
+           if (field.type === 'identifier' && field.pattern) {
+             var value = utilGetSetValue(input).trim().split(';')[0];
+             return value && value.match(new RegExp(field.pattern));
+           }
 
-         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);
-         };
+           return null;
+         } // clamp number to min/max
 
-         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;
-         };
+         function clamped(num) {
+           if (field.minValue !== undefined) {
+             num = Math.max(num, field.minValue);
+           }
 
-         map.centerZoomEase = function (loc2, z2, duration) {
-           duration = duration || 250;
-           setCenterZoom(loc2, z2, duration, false);
-           return map;
-         };
+           if (field.maxValue !== undefined) {
+             num = Math.min(num, field.maxValue);
+           }
 
-         map.transformEase = function (t2, duration) {
-           duration = duration || 250;
-           setTransform(t2, duration, false
-           /* don't force */
-           );
-           return map;
-         };
+           return num;
+         }
 
-         map.zoomToEase = function (obj, duration) {
-           var extent;
+         function change(onInput) {
+           return function () {
+             var t = {};
+             var val = utilGetSetValue(input);
+             if (!onInput) val = context.cleanTagValue(val); // don't override multiple values with blank string
 
-           if (Array.isArray(obj)) {
-             obj.forEach(function (entity) {
-               var entityExtent = entity.extent(context.graph());
+             if (!val && Array.isArray(_tags[field.key])) return;
 
-               if (!extent) {
-                 extent = entityExtent;
-               } else {
-                 extent = extent.extend(entityExtent);
+             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(';');
                }
-             });
-           } else {
-             extent = obj.extent(context.graph());
-           }
-
-           if (!isFinite(extent.area())) return map;
-           var z2 = clamp(map.trimmedExtentZoom(extent), 0, 20);
-           return map.centerZoomEase(extent.center(), z2, duration);
-         };
 
-         map.startEase = function () {
-           utilBindOnce(surface, _pointerPrefix + 'down.ease', function () {
-             map.cancelEase();
-           });
-           return map;
-         };
+               utilGetSetValue(input, val);
+             }
 
-         map.cancelEase = function () {
-           _selection.interrupt();
+             t[field.key] = val || undefined;
+             dispatch.call('change', this, t, onInput);
+           };
+         }
 
-           return map;
+         i.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
+           _entityIDs = val;
+           return i;
          };
 
-         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));
-           }
-         };
+         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);
 
-         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));
+           if (outlinkButton && !outlinkButton.empty()) {
+             var disabled = !validIdentifierValueForLink();
+             outlinkButton.classed('disabled', disabled);
            }
          };
 
-         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
+         i.focus = function () {
+           var node = input.node();
+           if (node) node.focus();
+         };
 
-           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;
+         function combinedEntityExtent() {
+           return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
          }
 
-         map.extentZoom = function (val) {
-           return calcExtentZoom(geoExtent(val), _dimensions);
-         };
-
-         map.trimmedExtentZoom = function (val) {
-           var trimY = 120;
-           var trimX = 40;
-           var trimmed = [_dimensions[0] - trimX, _dimensions[1] - trimY];
-           return calcExtentZoom(geoExtent(val), trimmed);
-         };
+         return utilRebind(i, dispatch, 'on');
+       }
 
-         map.withinEditableZoom = function () {
-           return map.zoom() >= context.minEditableZoom();
-         };
+       function uiFieldAccess(field, context) {
+         var dispatch = dispatch$8('change');
+         var items = select(null);
 
-         map.isInWideSelection = function () {
-           return !map.withinEditableZoom() && context.selectedIDs().length;
-         };
+         var _tags;
 
-         map.editableDataEnabled = function (skipZoomCheck) {
-           var layer = context.layers().layer('osm');
-           if (!layer || !layer.enabled()) return false;
-           return skipZoomCheck || map.withinEditableZoom();
-         };
+         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
 
-         map.notesEditable = function () {
-           var layer = context.layers().layer('notes');
-           if (!layer || !layer.enabled()) return false;
-           return map.withinEditableZoom();
-         };
+           var enter = items.enter().append('li').attr('class', function (d) {
+             return 'labeled-input preset-access-' + d;
+           });
+           enter.append('span').attr('class', 'label preset-label-access').attr('for', function (d) {
+             return 'preset-input-access-' + d;
+           }).html(function (d) {
+             return field.t.html('types.' + d);
+           });
+           enter.append('div').attr('class', 'preset-input-access-wrap').append('input').attr('type', 'text').attr('class', function (d) {
+             return 'preset-input-access preset-input-access-' + d;
+           }).call(utilNoAuto).each(function (d) {
+             select(this).call(uiCombobox(context, 'access-' + d).data(access.options(d)));
+           }); // Update
 
-         map.minzoom = function (val) {
-           if (!arguments.length) return _minzoom;
-           _minzoom = val;
-           return map;
-         };
+           items = items.merge(enter);
+           wrap.selectAll('.preset-input-access').on('change', change).on('blur', change);
+         }
 
-         map.toggleHighlightEdited = function () {
-           surface.classed('highlight-edited', !surface.classed('highlight-edited'));
-           map.pan([0, 0]); // trigger a redraw
+         function change(d3_event, d) {
+           var tag = {};
+           var value = context.cleanTagValue(utilGetSetValue(select(this))); // don't override multiple values with blank string
 
-           dispatch$1.call('changeHighlighting', this);
-         };
+           if (!value && typeof _tags[d] !== 'string') return;
+           tag[d] = value || undefined;
+           dispatch.call('change', this, tag);
+         }
 
-         map.areaFillOptions = ['wireframe', 'partial', 'full'];
+         access.options = function (type) {
+           var options = ['no', 'permissive', 'private', 'permit', 'destination'];
 
-         map.activeAreaFill = function (val) {
-           if (!arguments.length) return corePreferences('area-fill') || 'partial';
-           corePreferences('area-fill', val);
+           if (type !== 'access') {
+             options.unshift('yes');
+             options.push('designated');
 
-           if (val !== 'wireframe') {
-             corePreferences('area-fill-toggle', val);
+             if (type === 'bicycle') {
+               options.push('dismount');
+             }
            }
 
-           updateAreaFill();
-           map.pan([0, 0]); // trigger a redraw
+           return options.map(function (option) {
+             return {
+               title: field.t('options.' + option + '.description'),
+               value: option
+             };
+           });
+         };
 
-           dispatch$1.call('changeAreaFill', this);
-           return map;
+         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'
+           }
          };
 
-         map.toggleWireframe = function () {
-           var activeFill = map.activeAreaFill();
+         access.tags = function (tags) {
+           _tags = tags;
+           utilGetSetValue(items.selectAll('.preset-input-access'), function (d) {
+             return typeof tags[d] === 'string' ? tags[d] : '';
+           }).classed('mixed', function (d) {
+             return tags[d] && Array.isArray(tags[d]);
+           }).attr('title', function (d) {
+             return tags[d] && Array.isArray(tags[d]) && tags[d].filter(Boolean).join('\n');
+           }).attr('placeholder', function (d) {
+             if (tags[d] && Array.isArray(tags[d])) {
+               return _t('inspector.multiple_values');
+             }
 
-           if (activeFill === 'wireframe') {
-             activeFill = corePreferences('area-fill-toggle') || 'partial';
-           } else {
-             activeFill = 'wireframe';
-           }
+             if (d === 'access') {
+               return 'yes';
+             }
 
-           map.activeAreaFill(activeFill);
-         };
+             if (tags.access && typeof tags.access === 'string') {
+               return tags.access;
+             }
 
-         function updateAreaFill() {
-           var activeFill = map.activeAreaFill();
-           map.areaFillOptions.forEach(function (opt) {
-             surface.classed('fill-' + opt, Boolean(opt === activeFill));
-           });
-         }
+             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);
 
-         map.layers = function () {
-           return drawLayers;
+                 if (impliedAccesses.length === tags.highway.length && new Set(impliedAccesses).size === 1) {
+                   // if all the highway values have the same implied access for this type then use that
+                   return impliedAccesses[0];
+                 }
+               }
+             }
+
+             return field.placeholder();
+           });
          };
 
-         map.doubleUpHandler = function () {
-           return _doubleUpHandler;
+         access.focus = function () {
+           items.selectAll('.preset-input-access').node().focus();
          };
 
-         return utilRebind(map, dispatch$1, 'on');
+         return utilRebind(access, dispatch, 'on');
        }
 
-       function rendererPhotos(context) {
-         var dispatch$1 = dispatch('change');
-         var _layerIDs = ['streetside', 'mapillary', 'mapillary-map-features', 'mapillary-signs', 'openstreetcam'];
-         var _allPhotoTypes = ['flat', 'panoramic'];
+       function uiFieldAddress(field, context) {
+         var dispatch = dispatch$8('change');
 
-         var _shownPhotoTypes = _allPhotoTypes.slice(); // shallow copy
+         var _selection = select(null);
 
+         var _wrap = select(null);
 
-         var _dateFilters = ['fromDate', 'toDate'];
+         var addrField = _mainPresetIndex.field('address'); // needed for placeholder strings
 
-         var _fromDate;
+         var _entityIDs = [];
 
-         var _toDate;
+         var _tags;
 
-         var _usernames;
+         var _countryCode;
 
-         function photos() {}
+         var _addressFormats = [{
+           format: [['housenumber', 'street'], ['city', 'postcode']]
+         }];
+         _mainFileFetcher.get('address_formats').then(function (d) {
+           _addressFormats = d;
 
-         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 (!_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');
 
-           if (enabled.length) {
-             hash.photo_overlay = enabled.join(',');
-           } else {
-             delete hash.photo_overlay;
+           function isAddressable(d) {
+             return d.tags.highway && d.tags.name && d.type === 'way';
            }
-
-           window.location.replace('#' + utilQsString(hash, true));
          }
 
-         photos.overlayLayerIDs = function () {
-           return _layerIDs;
-         };
-
-         photos.allPhotoTypes = function () {
-           return _allPhotoTypes;
-         };
-
-         photos.dateFilters = function () {
-           return _dateFilters;
-         };
-
-         photos.dateFilterValue = function (val) {
-           return val === _dateFilters[0] ? _fromDate : _toDate;
-         };
+         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');
 
-         photos.setDateFilter = function (type, val, updateUrl) {
-           // validate the date
-           var date = val && new Date(val);
+           function isAddressable(d) {
+             if (d.tags.name) {
+               if (d.tags.admin_level === '8' && d.tags.boundary === 'administrative') return true;
+               if (d.tags.border_type === 'city') return true;
+               if (d.tags.place === 'city' || d.tags.place === 'town' || d.tags.place === 'village') return true;
+             }
 
-           if (date && !isNaN(date)) {
-             val = date.toISOString().substr(0, 10);
-           } else {
-             val = null;
+             if (d.tags['addr:city']) return true;
+             return false;
            }
+         }
+
+         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');
+         }
 
-           if (type === _dateFilters[0]) {
-             _fromDate = val;
+         function updateForCountryCode() {
+           if (!_countryCode) return;
+           var addressFormat;
 
-             if (_fromDate && _toDate && new Date(_toDate) < new Date(_fromDate)) {
-               _toDate = _fromDate;
-             }
-           }
+           for (var i = 0; i < _addressFormats.length; i++) {
+             var format = _addressFormats[i];
 
-           if (type === _dateFilters[1]) {
-             _toDate = val;
+             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 (_fromDate && _toDate && new Date(_toDate) < new Date(_fromDate)) {
-               _fromDate = _toDate;
+               break;
              }
            }
 
-           dispatch$1.call('change', this);
-
-           if (updateUrl) {
-             var rangeString;
-
-             if (_fromDate || _toDate) {
-               rangeString = (_fromDate || '') + '_' + (_toDate || '');
-             }
+           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
+           };
 
-             setUrlFilterValue('photo_dates', rangeString);
+           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
+               };
+             });
            }
-         };
 
-         photos.setUsernameFilter = function (val, updateUrl) {
-           if (val && typeof val === 'string') val = val.replace(/;/g, ',').split(',');
+           var rows = _wrap.selectAll('.addr-row').data(addressFormat.format, function (d) {
+             return d.toString();
+           });
 
-           if (val) {
-             val = val.map(function (d) {
-               return d.trim();
-             }).filter(Boolean);
+           rows.exit().remove();
+           rows.enter().append('div').attr('class', 'addr-row').selectAll('input').data(row).enter().append('input').property('type', 'text').call(updatePlaceholder).attr('class', function (d) {
+             return 'addr-' + d.id;
+           }).call(utilNoAuto).each(addDropdown).style('width', function (d) {
+             return d.width * 100 + '%';
+           });
 
-             if (!val.length) {
-               val = null;
-             }
+           function addDropdown(d) {
+             if (dropdowns.indexOf(d.id) === -1) return; // not a dropdown
+
+             var nearValues = d.id === 'street' ? getNearStreets : d.id === 'city' ? getNearCities : getNearValues;
+             select(this).call(uiCombobox(context, 'address-' + d.id).minItems(1).caseSensitive(true).fetcher(function (value, callback) {
+               callback(nearValues('addr:' + d.id));
+             }));
            }
 
-           _usernames = val;
-           dispatch$1.call('change', this);
+           _wrap.selectAll('input').on('blur', change()).on('change', change());
 
-           if (updateUrl) {
-             var hashString;
+           _wrap.selectAll('input:not(.combobox-input)').on('input', change(true));
 
-             if (_usernames) {
-               hashString = _usernames.join(',');
-             }
+           if (_tags) updateTags(_tags);
+         }
 
-             setUrlFilterValue('photo_username', hashString);
-           }
-         };
+         function address(selection) {
+           _selection = selection;
+           _wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+           _wrap = _wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(_wrap);
+           var extent = combinedEntityExtent();
 
-         function setUrlFilterValue(property, val) {
-           if (!window.mocha) {
-             var hash = utilStringQs(window.location.hash);
+           if (extent) {
+             var countryCode;
 
-             if (val) {
-               if (hash[property] === val) return;
-               hash[property] = val;
+             if (context.inIntro()) {
+               // localize the address format for the walkthrough
+               countryCode = _t('intro.graph.countrycode');
              } else {
-               if (!(property in hash)) return;
-               delete hash[property];
+               var center = extent.center();
+               countryCode = iso1A2Code(center);
              }
 
-             window.location.replace('#' + utilQsString(hash, true));
+             if (countryCode) {
+               _countryCode = countryCode.toLowerCase();
+               updateForCountryCode();
+             }
            }
          }
 
-         function showsLayer(id) {
-           var layer = context.layers().layer(id);
-           return layer && layer.supported() && layer.enabled();
-         }
+         function change(onInput) {
+           return function () {
+             var tags = {};
 
-         photos.shouldFilterByDate = function () {
-           return showsLayer('mapillary') || showsLayer('openstreetcam') || showsLayer('streetside');
-         };
+             _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
 
-         photos.shouldFilterByPhotoType = function () {
-           return showsLayer('mapillary') || showsLayer('streetside') && showsLayer('openstreetcam');
-         };
+               if (Array.isArray(_tags[key]) && !value) return;
+               tags[key] = value || undefined;
+             });
 
-         photos.shouldFilterByUsername = function () {
-           return showsLayer('mapillary') || showsLayer('openstreetcam') || showsLayer('streetside');
-         };
+             dispatch.call('change', this, tags, onInput);
+           };
+         }
 
-         photos.showsPhotoType = function (val) {
-           if (!photos.shouldFilterByPhotoType()) return true;
-           return _shownPhotoTypes.indexOf(val) !== -1;
-         };
+         function updatePlaceholder(inputSelection) {
+           return inputSelection.attr('placeholder', function (subfield) {
+             if (_tags && Array.isArray(_tags[field.key + ':' + subfield.id])) {
+               return _t('inspector.multiple_values');
+             }
 
-         photos.showsFlat = function () {
-           return photos.showsPhotoType('flat');
-         };
+             if (_countryCode) {
+               var localkey = subfield.id + '!' + _countryCode;
+               var tkey = addrField.hasTextForStringId('placeholders.' + localkey) ? localkey : subfield.id;
+               return addrField.t('placeholders.' + tkey);
+             }
+           });
+         }
 
-         photos.showsPanoramic = function () {
-           return photos.showsPhotoType('panoramic');
-         };
+         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);
+         }
 
-         photos.fromDate = function () {
-           return _fromDate;
-         };
+         function combinedEntityExtent() {
+           return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+         }
 
-         photos.toDate = function () {
-           return _toDate;
+         address.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
+           _entityIDs = val;
+           return address;
          };
 
-         photos.togglePhotoType = function (val) {
-           var index = _shownPhotoTypes.indexOf(val);
+         address.tags = function (tags) {
+           _tags = tags;
+           updateTags(tags);
+         };
 
-           if (index !== -1) {
-             _shownPhotoTypes.splice(index, 1);
-           } else {
-             _shownPhotoTypes.push(val);
-           }
+         address.focus = function () {
+           var node = _wrap.selectAll('input').node();
 
-           dispatch$1.call('change', this);
-           return photos;
+           if (node) node.focus();
          };
 
-         photos.usernames = function () {
-           return _usernames;
-         };
+         return utilRebind(address, dispatch, 'on');
+       }
 
-         photos.init = function () {
-           var hash = utilStringQs(window.location.hash);
+       function uiFieldCycleway(field, context) {
+         var dispatch = dispatch$8('change');
+         var items = select(null);
+         var wrap = select(null);
 
-           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);
-           }
+         var _tags;
 
-           if (hash.photo_username) {
-             this.setUsernameFilter(hash.photo_username, false);
+         function cycleway(selection) {
+           function stripcolon(s) {
+             return s.replace(':', '');
            }
 
-           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);
-             });
-           }
+           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
 
-           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);
+           wrap.selectAll('.preset-input-cycleway').on('change', change).on('blur', change);
+         }
 
-             if (results && results.length >= 3) {
-               var serviceId = results[1];
-               var photoKey = results[2];
-               var service = services[serviceId];
+         function change(d3_event, key) {
+           var newValue = context.cleanTagValue(utilGetSetValue(select(this))); // don't override multiple values with blank string
 
-               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 (!newValue && (Array.isArray(_tags.cycleway) || Array.isArray(_tags[key]))) return;
 
-                   if (!service.cachedImage(photoKey)) return;
-                   service.on('loadedImages.rendererPhotos', null);
-                   service.ensureViewerLoaded(context).then(function () {
-                     service.selectImage(context, photoKey).showViewer(context);
-                   });
-                 });
-               }
-             }
+           if (newValue === 'none' || newValue === '') {
+             newValue = undefined;
            }
 
-           context.layers().on('change.rendererPhotos', updateStorage);
-         };
-
-         return utilRebind(photos, dispatch$1, 'on');
-       }
-
-       function uiAccount(context) {
-         var osm = context.connection();
-
-         function update(selection) {
-           if (!osm) return;
+           var otherKey = key === 'cycleway:left' ? 'cycleway:right' : 'cycleway:left';
+           var otherValue = typeof _tags.cycleway === 'string' ? _tags.cycleway : _tags[otherKey];
 
-           if (!osm.authenticated()) {
-             selection.selectAll('.userLink, .logoutLink').classed('hide', true);
-             return;
+           if (otherValue && Array.isArray(otherValue)) {
+             // we must always have an explicit value for comparison
+             otherValue = otherValue[0];
            }
 
-           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
-
-             var userLinkA = userLink.append('a').attr('href', osm.userURL(details.display_name)).attr('target', '_blank'); // Add thumbnail or dont
+           if (otherValue === 'none' || otherValue === '') {
+             otherValue = undefined;
+           }
 
-             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
+           var tag = {}; // If the left and right tags match, use the cycleway tag to tag both
+           // sides the same way
 
+           if (newValue === otherValue) {
+             tag = {
+               cycleway: newValue,
+               'cycleway:left': undefined,
+               'cycleway:right': undefined
+             };
+           } else {
+             // Always set both left and right as changing one can affect the other
+             tag = {
+               cycleway: undefined
+             };
+             tag[key] = newValue;
+             tag[otherKey] = otherValue;
+           }
 
-             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();
-             });
-           });
+           dispatch.call('change', this, tag);
          }
 
-         return function (selection) {
-           selection.append('li').attr('class', 'userLink').classed('hide', true);
-           selection.append('li').attr('class', 'logoutLink').classed('hide', true);
-
-           if (osm) {
-             osm.on('change.account', function () {
-               update(selection);
-             });
-             update(selection);
-           }
+         cycleway.options = function () {
+           return field.options.map(function (option) {
+             return {
+               title: field.t('options.' + option + '.description'),
+               value: option
+             };
+           });
          };
-       }
 
-       function uiAttribution(context) {
-         var _selection = select(null);
+         cycleway.tags = function (tags) {
+           _tags = tags; // If cycleway is set, use that instead of individual values
 
-         function render(selection, data, klass) {
-           var div = selection.selectAll(".".concat(klass)).data([0]);
-           div = div.enter().append('div').attr('class', klass).merge(div);
-           var attributions = div.selectAll('.attribution').data(data, function (d) {
-             return d.id;
-           });
-           attributions.exit().remove();
-           attributions = attributions.enter().append('span').attr('class', 'attribution').each(function (d, i, nodes) {
-             var attribution = select(nodes[i]);
+           var 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 = [];
 
-             if (d.terms_html) {
-               attribution.html(d.terms_html);
-               return;
-             }
+               if (Array.isArray(tags.cycleway)) {
+                 vals = vals.concat(tags.cycleway);
+               }
 
-             if (d.terms_url) {
-               attribution = attribution.append('a').attr('href', d.terms_url).attr('target', '_blank');
-             }
+               if (Array.isArray(tags[d])) {
+                 vals = vals.concat(tags[d]);
+               }
 
-             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()
-             });
+               return vals.filter(Boolean).join('\n');
+             }
 
-             if (d.icon && !d.overlay) {
-               attribution.append('img').attr('class', 'source-image').attr('src', d.icon);
+             return null;
+           }).attr('placeholder', function (d) {
+             if (Array.isArray(tags.cycleway) || Array.isArray(tags[d])) {
+               return _t('inspector.multiple_values');
              }
 
-             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] : [];
+             return field.placeholder();
+           }).classed('mixed', function (d) {
+             return Array.isArray(tags.cycleway) || Array.isArray(tags[d]);
            });
-           copyright.exit().remove();
-           copyright = copyright.enter().append('span').attr('class', 'copyright-notice').merge(copyright);
-           copyright.html(String);
-         }
-
-         function update() {
-           var baselayer = context.background().baseLayerSource();
-
-           _selection.call(render, baselayer ? [baselayer] : [], 'base-layer-attribution');
-
-           var z = context.map().zoom();
-           var overlays = context.background().overlayLayerSources() || [];
-
-           _selection.call(render, overlays.filter(function (s) {
-             return s.validZoom(z);
-           }), 'overlay-layer-attribution');
-         }
+         };
 
-         return function (selection) {
-           _selection = selection;
-           context.background().on('change.attribution', update);
-           context.map().on('move.attribution', throttle(update, 400, {
-             leading: false
-           }));
-           update();
+         cycleway.focus = function () {
+           var node = wrap.selectAll('input').node();
+           if (node) node.focus();
          };
+
+         return utilRebind(cycleway, dispatch, 'on');
        }
 
-       function uiContributors(context) {
-         var osm = context.connection(),
-             debouncedUpdate = debounce(function () {
-           update();
-         }, 1000),
-             limit = 4,
-             hidden = false,
-             wrap = select(null);
+       function uiFieldLanes(field, context) {
+         var dispatch = dispatch$8('change');
+         var LANE_WIDTH = 40;
+         var LANE_HEIGHT = 200;
+         var _entityIDs = [];
 
-         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);
+         function lanes(selection) {
+           var lanesData = context.entity(_entityIDs[0]).lanes();
 
-           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 (!context.container().select('.inspector-wrap.inspector-hidden').empty() || !selection.node().parentNode) {
+             selection.call(lanes.off);
+             return;
            }
 
-           if (!u.length) {
-             hidden = true;
-             wrap.transition().style('opacity', 0);
-           } else if (hidden) {
-             wrap.transition().style('opacity', 1);
-           }
+           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';
+           });
          }
 
-         return function (selection) {
-           if (!osm) return;
-           wrap = selection;
-           update();
-           osm.on('loaded.contributors', debouncedUpdate);
-           context.map().on('move.contributors', debouncedUpdate);
+         lanes.entityIDs = function (val) {
+           _entityIDs = val;
          };
+
+         lanes.tags = function () {};
+
+         lanes.focus = function () {};
+
+         lanes.off = function () {};
+
+         return utilRebind(lanes, dispatch, 'on');
        }
+       uiFieldLanes.supportsMultiselection = false;
 
-       var _popoverID = 0;
-       function uiPopover(klass) {
-         var _id = _popoverID++;
+       var _languagesArray = [];
+       function uiFieldLocalized(field, context) {
+         var dispatch = dispatch$8('change', 'input');
+         var wikipedia = services.wikipedia;
+         var input = select(null);
+         var localizedInputs = select(null);
 
-         var _anchorSelection = select(null);
+         var _countryCode;
 
-         var popover = function popover(selection) {
-           _anchorSelection = selection;
-           selection.each(setup);
-         };
+         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 _animation = utilFunctor(false);
 
-         var _placement = utilFunctor('top'); // top, bottom, left, right
+         _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
 
+         var langCombo = uiCombobox(context, 'localized-lang').fetcher(fetchLanguages).minItems(0);
 
-         var _alignment = utilFunctor('center'); // leading, center, trailing
+         var _selection = select(null);
 
+         var _multilingual = [];
 
-         var _scrollContainer = utilFunctor(select(null));
+         var _buttonTip = uiTooltip().title(_t.html('translate.translate')).placement('left');
 
-         var _content;
+         var _wikiTitles;
 
-         var _displayType = utilFunctor('');
+         var _entityIDs = [];
 
-         var _hasArrow = utilFunctor(true); // use pointer events on supported platforms; fallback to mouse events
+         function loadLanguagesArray(dataLanguages) {
+           if (_languagesArray.length !== 0) return; // some conversion is needed to ensure correct OSM tags are used
 
+           var replacements = {
+             sr: 'sr-Cyrl',
+             // in OSM, `sr` implies Cyrillic
+             'sr-Cyrl': false // `sr-Cyrl` isn't used in OSM
 
-         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+           };
 
-         popover.displayType = function (val) {
-           if (arguments.length) {
-             _displayType = utilFunctor(val);
-             return popover;
-           } else {
-             return _displayType;
-           }
-         };
+           for (var code in dataLanguages) {
+             if (replacements[code] === false) continue;
+             var metaCode = code;
+             if (replacements[code]) metaCode = replacements[code];
 
-         popover.hasArrow = function (val) {
-           if (arguments.length) {
-             _hasArrow = utilFunctor(val);
-             return popover;
-           } else {
-             return _hasArrow;
+             _languagesArray.push({
+               localName: _mainLocalizer.languageName(metaCode, {
+                 localOnly: true
+               }),
+               nativeName: dataLanguages[metaCode].nativeName,
+               code: code,
+               label: _mainLocalizer.languageName(metaCode)
+             });
            }
-         };
+         }
 
-         popover.placement = function (val) {
-           if (arguments.length) {
-             _placement = utilFunctor(val);
-             return popover;
-           } else {
-             return _placement;
-           }
-         };
+         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
 
-         popover.alignment = function (val) {
-           if (arguments.length) {
-             _alignment = utilFunctor(val);
-             return popover;
-           } else {
-             return _alignment;
-           }
-         };
+             if (entity.tags.wikidata) return true; // Assume the name has already been confirmed if its source has been researched
 
-         popover.scrollContainer = function (val) {
-           if (arguments.length) {
-             _scrollContainer = utilFunctor(val);
-             return popover;
-           } else {
-             return _scrollContainer;
-           }
-         };
+             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`
 
-         popover.content = function (val) {
-           if (arguments.length) {
-             _content = val;
-             return popover;
-           } else {
-             return _content;
-           }
-         };
+             var preset = _mainPresetIndex.match(entity, context.graph());
 
-         popover.isShown = function () {
-           var popoverSelection = _anchorSelection.select('.popover-' + _id);
+             if (preset) {
+               var isSuggestion = preset.suggestion;
+               var fields = preset.fields();
+               var showsBrandField = fields.some(function (d) {
+                 return d.id === 'brand';
+               });
+               var showsOperatorField = fields.some(function (d) {
+                 return d.id === 'operator';
+               });
+               var setsName = preset.addTags.name;
+               var setsBrandWikidata = preset.addTags['brand:wikidata'];
+               var setsOperatorWikidata = preset.addTags['operator:wikidata'];
+               return isSuggestion && setsName && (setsBrandWikidata && !showsBrandField || setsOperatorWikidata && !showsOperatorField);
+             }
 
-           return !popoverSelection.empty() && popoverSelection.classed('in');
-         };
+             return false;
+           });
 
-         popover.show = function () {
-           _anchorSelection.each(show);
-         };
+           field.locked(isLocked);
+         } // update _multilingual, maintaining the existing order
 
-         popover.updateContent = function () {
-           _anchorSelection.each(updateContent);
-         };
 
-         popover.hide = function () {
-           _anchorSelection.each(hide);
-         };
+         function calcMultilingual(tags) {
+           var existingLangsOrdered = _multilingual.map(function (item) {
+             return item.lang;
+           });
 
-         popover.toggle = function () {
-           _anchorSelection.each(toggle);
-         };
+           var existingLangs = new Set(existingLangsOrdered.filter(Boolean));
 
-         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();
-         };
+           for (var k in tags) {
+             var m = k.match(/^(.*):(.*)$/);
 
-         popover.destroyAny = function (selection) {
-           selection.call(popover.destroy, '.popover');
-         };
+             if (m && m[1] === field.key && m[2]) {
+               var item = {
+                 lang: m[2],
+                 value: tags[k]
+               };
 
-         function setup() {
-           var anchor = 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);
+               }
+             }
+           } // Don't remove items based on deleted tags, since this makes the UI
+           // disappear unexpectedly when clearing values - #8164
 
-           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);
+           _multilingual.forEach(function (item) {
+             if (item.lang && existingLangs.has(item.lang)) {
+               item.value = '';
+             }
+           });
+         }
 
-           if (animate) {
-             popoverSelection.classed('fade', true);
-           }
+         function localized(selection) {
+           _selection = selection;
+           calcLocked();
+           var isLocked = field.locked();
+           var wrap = selection.selectAll('.form-field-input-wrap').data([0]); // enter/update
 
-           var display = _displayType.apply(this, arguments);
+           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
 
-           if (display === 'hover') {
-             var _lastNonMouseEnterTime;
+           input = input.enter().append('input').attr('type', 'text').attr('id', field.domId).attr('class', 'localized-main').call(utilNoAuto).merge(input);
+           input.classed('disabled', !!isLocked).attr('readonly', isLocked || null).on('input', change(true)).on('blur', change()).on('change', change());
+           var translateButton = wrap.selectAll('.localized-add').data([0]);
+           translateButton = translateButton.enter().append('button').attr('class', 'localized-add form-field-button').call(svgIcon('#iD-icon-plus')).merge(translateButton);
+           translateButton.classed('disabled', !!isLocked).call(isLocked ? _buttonTip.destroy : _buttonTip).on('click', addNew);
 
-             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
+           if (_tags && !_multilingual.length) {
+             calcMultilingual(_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
+           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);
 
+           function addNew(d3_event) {
+             d3_event.preventDefault();
+             if (field.locked()) return;
+             var defaultLang = _mainLocalizer.languageCode().toLowerCase();
 
-               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);
+             var langExists = _multilingual.find(function (datum) {
+               return datum.lang === defaultLang;
              });
-           } 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);
+
+             var isLangEn = defaultLang.indexOf('en') > -1;
+
+             if (isLangEn || langExists) {
+               defaultLang = '';
+               langExists = _multilingual.find(function (datum) {
+                 return datum.lang === defaultLang;
                });
-             });
-           }
-         }
+             }
 
-         function show() {
-           var anchor = select(this);
-           var popoverSelection = anchor.selectAll('.popover-' + _id);
+             if (!langExists) {
+               // prepend the value so it appears at the top
+               _multilingual.unshift({
+                 lang: defaultLang,
+                 value: ''
+               });
 
-           if (popoverSelection.empty()) {
-             // popover was removed somehow, put it back
-             anchor.call(popover.destroy);
-             anchor.each(setup);
-             popoverSelection = anchor.selectAll('.popover-' + _id);
+               localizedInputs.call(renderMultilingual);
+             }
            }
 
-           popoverSelection.classed('in', true);
+           function change(onInput) {
+             return function (d3_event) {
+               if (field.locked()) {
+                 d3_event.preventDefault();
+                 return;
+               }
 
-           var displayType = _displayType.apply(this, arguments);
+               var val = utilGetSetValue(select(this));
+               if (!onInput) val = context.cleanTagValue(val); // don't override multiple values with blank string
 
-           if (displayType === 'clickFocus') {
-             anchor.classed('active', true);
-             popoverSelection.node().focus();
+               if (!val && Array.isArray(_tags[field.key])) return;
+               var t = {};
+               t[field.key] = val || undefined;
+               dispatch.call('change', this, t, onInput);
+             };
            }
+         }
 
-           anchor.each(updateContent);
+         function key(lang) {
+           return field.key + ':' + lang;
          }
 
-         function updateContent() {
-           var anchor = select(this);
+         function changeLang(d3_event, d) {
+           var tags = {}; // make sure unrecognized suffixes are lowercase - #7156
 
-           if (_content) {
-             anchor.selectAll('.popover-' + _id + ' > .popover-inner').call(_content.apply(this, arguments));
-           }
+           var lang = utilGetSetValue(select(this)).toLowerCase();
 
-           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
+           var language = _languagesArray.find(function (d) {
+             return d.label.toLowerCase() === lang || d.localName && d.localName.toLowerCase() === lang || d.nativeName && d.nativeName.toLowerCase() === lang;
+           });
 
-           updatePosition.apply(this, arguments);
-           updatePosition.apply(this, arguments);
-         }
+           if (language) lang = language.code;
 
-         function updatePosition() {
-           var anchor = select(this);
-           var popoverSelection = anchor.selectAll('.popover-' + _id);
+           if (d.lang && d.lang !== lang) {
+             tags[key(d.lang)] = undefined;
+           }
 
-           var scrollContainer = _scrollContainer && _scrollContainer.apply(this, arguments);
+           var newKey = lang && context.cleanTagKey(key(lang));
+           var value = utilGetSetValue(select(this.parentNode).selectAll('.localized-value'));
 
-           var scrollNode = scrollContainer && !scrollContainer.empty() && scrollContainer.node();
-           var scrollLeft = scrollNode ? scrollNode.scrollLeft : 0;
-           var scrollTop = scrollNode ? scrollNode.scrollTop : 0;
+           if (newKey && value) {
+             tags[newKey] = value;
+           } else if (newKey && _wikiTitles && _wikiTitles[d.lang]) {
+             tags[newKey] = _wikiTitles[d.lang];
+           }
 
-           var placement = _placement.apply(this, arguments);
+           d.lang = lang;
+           dispatch.call('change', this, tags);
+         }
 
-           popoverSelection.classed('left', false).classed('right', false).classed('top', false).classed('bottom', false).classed(placement, true);
+         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
 
-           var alignment = _alignment.apply(this, arguments);
+           if (!value && Array.isArray(d.value)) return;
+           var t = {};
+           t[key(d.lang)] = value;
+           d.value = value;
+           dispatch.call('change', this, t);
+         }
 
-           var alignFactor = 0.5;
+         function fetchLanguages(value, cb) {
+           var v = value.toLowerCase(); // show the user's language first
 
-           if (alignment === 'leading') {
-             alignFactor = 0;
-           } else if (alignment === 'trailing') {
-             alignFactor = 1;
+           var langCodes = [_mainLocalizer.localeCode(), _mainLocalizer.languageCode()];
+
+           if (_countryCode && _territoryLanguages[_countryCode]) {
+             langCodes = langCodes.concat(_territoryLanguages[_countryCode]);
            }
 
-           var anchorFrame = getFrame(anchor.node());
-           var popoverFrame = getFrame(popoverSelection.node());
-           var position;
+           var langItems = [];
+           langCodes.forEach(function (code) {
+             var langItem = _languagesArray.find(function (item) {
+               return item.code === code;
+             });
 
-           switch (placement) {
-             case 'top':
-               position = {
-                 x: anchorFrame.x + (anchorFrame.w - popoverFrame.w) * alignFactor,
-                 y: anchorFrame.y - popoverFrame.h
-               };
-               break;
+             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
+             };
+           }));
+         }
 
-             case 'bottom':
-               position = {
-                 x: anchorFrame.x + (anchorFrame.w - popoverFrame.w) * alignFactor,
-                 y: anchorFrame.y + anchorFrame.h
-               };
-               break;
+         function renderMultilingual(selection) {
+           var entries = selection.selectAll('div.entry').data(_multilingual, function (d) {
+             return d.lang;
+           });
+           entries.exit().style('top', '0').style('max-height', '240px').transition().duration(200).style('opacity', '0').style('max-height', '0px').remove();
+           var entriesEnter = entries.enter().append('div').attr('class', 'entry').each(function (_, index) {
+             var wrap = select(this);
+             var domId = utilUniqueDomId(index);
+             var label = wrap.append('label').attr('class', 'field-label').attr('for', domId);
+             var text = label.append('span').attr('class', 'label-text');
+             text.append('span').attr('class', 'label-textvalue').html(_t.html('translate.localized_translation_label'));
+             text.append('span').attr('class', 'label-textannotation');
+             label.append('button').attr('class', 'remove-icon-multilingual').on('click', function (d3_event, d) {
+               if (field.locked()) return;
+               d3_event.preventDefault(); // remove the UI item manually
 
-             case 'left':
-               position = {
-                 x: anchorFrame.x - popoverFrame.w,
-                 y: anchorFrame.y + (anchorFrame.h - popoverFrame.h) * alignFactor
-               };
-               break;
+               _multilingual.splice(_multilingual.indexOf(d), 1);
 
-             case 'right':
-               position = {
-                 x: anchorFrame.x + anchorFrame.w,
-                 y: anchorFrame.y + (anchorFrame.h - popoverFrame.h) * alignFactor
-               };
-               break;
-           }
+               var langKey = d.lang && key(d.lang);
 
-           if (position) {
-             if (scrollNode && (placement === 'top' || placement === 'bottom')) {
-               var initialPosX = position.x;
+               if (langKey && langKey in _tags) {
+                 delete _tags[langKey]; // remove from entity tags
 
-               if (position.x + popoverFrame.w > scrollNode.offsetWidth - 10) {
-                 position.x = scrollNode.offsetWidth - 10 - popoverFrame.w;
-               } else if (position.x < 10) {
-                 position.x = 10;
+                 var t = {};
+                 t[langKey] = undefined;
+                 dispatch.call('change', this, t);
+                 return;
                }
 
-               var arrow = anchor.selectAll('.popover-' + _id + ' > .popover-arrow'); // keep the arrow centered on the button, or as close as possible
+               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
 
-               var arrowPosX = Math.min(Math.max(popoverFrame.w / 2 - (position.x - initialPosX), 10), popoverFrame.w - 10);
-               arrow.style('left', ~~arrowPosX + 'px');
+           entries.classed('present', true);
+           utilGetSetValue(entries.select('.localized-lang'), function (d) {
+             var langItem = _languagesArray.find(function (item) {
+               return item.code === d.lang;
+             });
+
+             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);
+           });
+         }
+
+         localized.tags = function (tags) {
+           _tags = tags; // Fetch translations from wikipedia
+
+           if (typeof tags.wikipedia === 'string' && !_wikiTitles) {
+             _wikiTitles = {};
+             var wm = tags.wikipedia.match(/([^:]+):(.+)/);
+
+             if (wm && wm[0] && wm[1]) {
+               wikipedia.translations(wm[1], wm[2], function (err, d) {
+                 if (err || !d) return;
+                 _wikiTitles = d;
+               });
              }
+           }
+
+           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);
+
+           _selection.call(localized);
+         };
+
+         localized.focus = function () {
+           input.node().focus();
+         };
+
+         localized.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
+           _entityIDs = val;
+           _multilingual = [];
+           loadCountryCode();
+           return localized;
+         };
+
+         function loadCountryCode() {
+           var extent = combinedEntityExtent();
+           var countryCode = extent && iso1A2Code(extent.center());
+           _countryCode = countryCode && countryCode.toLowerCase();
+         }
+
+         function combinedEntityExtent() {
+           return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+         }
+
+         return utilRebind(localized, dispatch, 'on');
+       }
+
+       function uiFieldRoadspeed(field, context) {
+         var dispatch = dispatch$8('change');
+         var unitInput = select(null);
+         var input = select(null);
+         var _entityIDs = [];
 
-             popoverSelection.style('left', ~~position.x + 'px').style('top', ~~position.y + 'px');
-           } else {
-             popoverSelection.style('left', null).style('top', null);
-           }
+         var _tags;
 
-           function getFrame(node) {
-             var positionStyle = select(node).style('position');
+         var _isImperial;
 
-             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
-               };
-             }
-           }
-         }
+         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];
 
-         function hide() {
-           var anchor = select(this);
+         function roadspeed(selection) {
+           var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+           wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
+           input = wrap.selectAll('input.roadspeed-number').data([0]);
+           input = input.enter().append('input').attr('type', 'text').attr('class', 'roadspeed-number').attr('id', field.domId).call(utilNoAuto).call(speedCombo).merge(input);
+           input.on('change', change).on('blur', change);
+           var loc = combinedEntityExtent().center();
+           _isImperial = roadSpeedUnit(loc) === 'mph';
+           unitInput = wrap.selectAll('input.roadspeed-unit').data([0]);
+           unitInput = unitInput.enter().append('input').attr('type', 'text').attr('class', 'roadspeed-unit').call(unitCombo).merge(unitInput);
+           unitInput.on('blur', changeUnits).on('change', changeUnits);
 
-           if (_displayType.apply(this, arguments) === 'clickFocus') {
-             anchor.classed('active', false);
+           function changeUnits() {
+             _isImperial = utilGetSetValue(unitInput) === 'mph';
+             utilGetSetValue(unitInput, _isImperial ? 'mph' : 'km/h');
+             setUnitSuggestions();
+             change();
            }
-
-           anchor.selectAll('.popover-' + _id).classed('in', false);
          }
 
-         function toggle() {
-           if (select(this).select('.popover-' + _id).classed('in')) {
-             hide.apply(this, arguments);
-           } else {
-             show.apply(this, arguments);
-           }
+         function setUnitSuggestions() {
+           speedCombo.data((_isImperial ? imperialValues : metricValues).map(comboValues));
+           utilGetSetValue(unitInput, _isImperial ? 'mph' : 'km/h');
          }
 
-         return popover;
-       }
+         function comboValues(d) {
+           return {
+             value: d.toString(),
+             title: d.toString()
+           };
+         }
 
-       function uiTooltip(klass) {
-         var tooltip = uiPopover((klass || '') + ' tooltip').displayType('hover');
+         function change() {
+           var tag = {};
+           var value = utilGetSetValue(input).trim(); // don't override multiple values with blank string
 
-         var _title = function _title() {
-           var title = this.getAttribute('data-original-title');
+           if (!value && Array.isArray(_tags[field.key])) return;
 
-           if (title) {
-             return title;
+           if (!value) {
+             tag[field.key] = undefined;
+           } else if (isNaN(value) || !_isImperial) {
+             tag[field.key] = context.cleanTagValue(value);
            } else {
-             title = this.getAttribute('title');
-             this.removeAttribute('title');
-             this.setAttribute('data-original-title', title);
+             tag[field.key] = context.cleanTagValue(value + ' mph');
            }
 
-           return title;
-         };
+           dispatch.call('change', this, tag);
+         }
 
-         var _heading = utilFunctor(null);
+         roadspeed.tags = function (tags) {
+           _tags = tags;
+           var value = tags[field.key];
+           var isMixed = Array.isArray(value);
 
-         var _keys = utilFunctor(null);
+           if (!isMixed) {
+             if (value && value.indexOf('mph') >= 0) {
+               value = parseInt(value, 10).toString();
+               _isImperial = true;
+             } else if (value) {
+               _isImperial = false;
+             }
+           }
 
-         tooltip.title = function (val) {
-           if (!arguments.length) return _title;
-           _title = utilFunctor(val);
-           return tooltip;
+           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);
          };
 
-         tooltip.heading = function (val) {
-           if (!arguments.length) return _heading;
-           _heading = utilFunctor(val);
-           return tooltip;
+         roadspeed.focus = function () {
+           input.node().focus();
          };
 
-         tooltip.keys = function (val) {
-           if (!arguments.length) return _keys;
-           _keys = utilFunctor(val);
-           return tooltip;
+         roadspeed.entityIDs = function (val) {
+           _entityIDs = val;
          };
 
-         tooltip.content(function () {
-           var heading = _heading.apply(this, arguments);
-
-           var text = _title.apply(this, arguments);
-
-           var keys = _keys.apply(this, arguments);
+         function combinedEntityExtent() {
+           return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+         }
 
-           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;
+         return utilRebind(roadspeed, dispatch, 'on');
        }
 
-       function uiEditMenu(context) {
-         var dispatch$1 = dispatch('toggled');
-
-         var _menu = select(null);
-
-         var _operations = []; // the position the menu should be displayed relative to
-
-         var _anchorLoc = [0, 0];
-         var _anchorLocLonLat = [0, 0]; // a string indicating how the menu was opened
-
-         var _triggerType = '';
-         var _vpTopMargin = 85; // viewport top margin
-
-         var _vpBottomMargin = 45; // viewport bottom margin
+       function uiFieldRadio(field, context) {
+         var dispatch = dispatch$8('change');
+         var placeholder = select(null);
+         var wrap = select(null);
+         var labels = select(null);
+         var radios = select(null);
+         var radioData = (field.options || field.keys).slice(); // shallow copy
 
-         var _vpSideMargin = 35; // viewport side margin
+         var typeField;
+         var layerField;
+         var _oldType = {};
+         var _entityIDs = [];
 
-         var _menuTop = false;
+         function selectedKey() {
+           var node = wrap.selectAll('.form-field-input-radio label.active input');
+           return !node.empty() && node.datum();
+         }
 
-         var _menuHeight;
+         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);
+         }
 
-         var _menuWidth; // hardcode these values to make menu positioning easier
+         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);
+             }
 
-         var _verticalPadding = 4; // see also `.edit-menu .tooltip` CSS; include margin
+             typeField.tags(tags);
+           } else {
+             typeField = null;
+           }
 
-         var _tooltipWidth = 210; // offset the menu slightly from the target location
+           var typeItem = list.selectAll('.structure-type-item').data(typeField ? [typeField] : [], function (d) {
+             return d.id;
+           }); // Exit
 
-         var _menuSideMargin = 10;
-         var _tooltips = [];
+           typeItem.exit().remove(); // Enter
 
-         var editMenu = function editMenu(selection) {
-           var isTouchMenu = _triggerType.includes('touch') || _triggerType.includes('pen');
+           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
 
-           var ops = _operations.filter(function (op) {
-             return !isTouchMenu || !op.mouseOnly;
-           });
+           typeItem = typeItem.merge(typeEnter);
 
-           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 (typeField) {
+             typeItem.selectAll('.structure-input-type-wrap').call(typeField.render);
+           } // Layer
 
-           _menuTop = isTouchMenu; // Show labels for touch input since there aren't hover tooltips
 
-           var showLabels = isTouchMenu;
-           var buttonHeight = showLabels ? 32 : 34;
+           if (layer && showLayer) {
+             if (!layerField) {
+               layerField = uiField(context, layer, _entityIDs, {
+                 wrap: false
+               }).on('change', changeLayer);
+             }
 
-           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;
-             })));
+             layerField.tags(tags);
+             field.keys = utilArrayUnion(field.keys, ['layer']);
            } else {
-             _menuWidth = 44;
+             layerField = null;
+             field.keys = field.keys.filter(function (k) {
+               return k !== 'layer';
+             });
            }
 
-           _menuHeight = _verticalPadding * 2 + ops.length * buttonHeight;
-           _menu = selection.append('div').attr('class', 'edit-menu').classed('touch-menu', isTouchMenu).style('padding', _verticalPadding + 'px 0');
-
-           var buttons = _menu.selectAll('.edit-menu-item').data(ops); // enter
-
-
-           var buttonsEnter = buttons.enter().append('button').attr('class', function (d) {
-             return 'edit-menu-item edit-menu-item-' + d.id;
-           }).style('height', buttonHeight + 'px').on('click', click) // don't listen for `mouseup` because we only care about non-mouse pointer types
-           .on('pointerup', pointerup).on('pointerdown mousedown', function pointerdown(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]]);
+           var layerItem = list.selectAll('.structure-layer-item').data(layerField ? [layerField] : []); // Exit
 
-             _tooltips.push(tooltip);
+           layerItem.exit().remove(); // Enter
 
-             select(this).call(tooltip).append('div').attr('class', 'icon-wrap').call(svgIcon('#iD-operation-' + d.id, 'operation'));
-           });
+           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
 
-           if (showLabels) {
-             buttonsEnter.append('span').attr('class', 'label').html(function (d) {
-               return d.title;
-             });
-           } // update
+           layerItem = layerItem.merge(layerEnter);
 
+           if (layerField) {
+             layerItem.selectAll('.structure-input-layer-wrap').call(layerField.render);
+           }
+         }
 
-           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`
+         function changeType(t, onInput) {
+           var key = selectedKey();
+           if (!key) return;
+           var val = t[key];
 
-           function pointerup(d3_event) {
-             lastPointerUpType = d3_event.pointerType;
+           if (val !== 'no') {
+             _oldType[key] = val;
            }
 
-           function click(d3_event, operation) {
-             d3_event.stopPropagation();
+           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 (operation.relatedEntityIds) {
-               utilHighlightEntities(operation.relatedEntityIds(), false, context);
-             }
 
-             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 (t.layer === undefined) {
+               if (key === 'bridge' && val !== 'no') {
+                 t.layer = '1';
                }
 
-               operation();
-               editMenu.close();
+               if (key === 'tunnel' && val !== 'no' && val !== 'building_passage') {
+                 t.layer = '-1';
+               }
              }
+           }
 
-             lastPointerUpType = null;
+           dispatch.call('change', this, t, onInput);
+         }
+
+         function changeLayer(t, onInput) {
+           if (t.layer === '0') {
+             t.layer = undefined;
            }
 
-           dispatch$1.call('toggled', this, true);
-         };
+           dispatch.call('change', this, t, onInput);
+         }
 
-         function updatePosition() {
-           if (!_menu || _menu.empty()) return;
-           var anchorLoc = context.projection(_anchorLocLonLat);
-           var viewport = context.surfaceRect();
+         function changeRadio() {
+           var t = {};
+           var activeKey;
 
-           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;
+           if (field.key) {
+             t[field.key] = undefined;
            }
 
-           var menuLeft = displayOnLeft(viewport);
-           var offset = [0, 0];
-           offset[0] = menuLeft ? -1 * (_menuSideMargin + _menuWidth) : _menuSideMargin;
+           radios.each(function (d) {
+             var active = select(this).property('checked');
+             if (active) activeKey = d;
 
-           if (_menuTop) {
-             if (anchorLoc[1] - _menuHeight < _vpTopMargin) {
-               // menu is near top viewport edge, shift downward
-               offset[1] = -anchorLoc[1] + _vpTopMargin;
+             if (field.key) {
+               if (active) t[field.key] = d;
              } else {
-               offset[1] = -_menuHeight;
+               var val = _oldType[activeKey] || 'yes';
+               t[d] = active ? val : undefined;
              }
-           } else {
-             if (anchorLoc[1] + _menuHeight > viewport.height - _vpBottomMargin) {
-               // menu is near bottom viewport edge, shift upwards
-               offset[1] = -anchorLoc[1] - _menuHeight + viewport.height - _vpBottomMargin;
+           });
+
+           if (field.type === 'structureRadio') {
+             if (activeKey === 'bridge') {
+               t.layer = '1';
+             } else if (activeKey === 'tunnel' && t.tunnel !== 'building_passage') {
+               t.layer = '-1';
              } else {
-               offset[1] = 0;
+               t.layer = undefined;
              }
            }
 
-           var origin = geoVecAdd(anchorLoc, offset);
-
-           _menu.style('left', origin[0] + 'px').style('top', origin[1] + 'px');
+           dispatch.call('change', this, t);
+         }
 
-           var tooltipSide = tooltipPosition(viewport, menuLeft);
+         radio.tags = function (tags) {
+           radios.property('checked', function (d) {
+             if (field.key) {
+               return tags[field.key] === d;
+             }
 
-           _tooltips.forEach(function (tooltip) {
-             tooltip.placement(tooltipSide);
+             return !!(typeof tags[d] === 'string' && tags[d].toLowerCase() !== 'no');
            });
 
-           function displayOnLeft(viewport) {
-             if (_mainLocalizer.textDirection() === 'ltr') {
-               if (anchorLoc[0] + _menuSideMargin + _menuWidth > viewport.width - _vpSideMargin) {
-                 // right menu would be too close to the right viewport edge, go left
-                 return true;
-               } // prefer right menu
-
-
-               return false;
-             } else {
-               // rtl
-               if (anchorLoc[0] - _menuSideMargin - _menuWidth < _vpSideMargin) {
-                 // left menu would be too close to the left viewport edge, go right
-                 return false;
-               } // prefer left menu
-
-
-               return true;
+           function isMixed(d) {
+             if (field.key) {
+               return Array.isArray(tags[field.key]) && tags[field.key].includes(d);
              }
-           }
-
-           function tooltipPosition(viewport, menuLeft) {
-             if (_mainLocalizer.textDirection() === 'ltr') {
-               if (menuLeft) {
-                 // if there's not room for a right-side menu then there definitely
-                 // isn't room for right-side tooltips
-                 return 'left';
-               }
-
-               if (anchorLoc[0] + _menuSideMargin + _menuWidth + _tooltipWidth > viewport.width - _vpSideMargin) {
-                 // right tooltips would be too close to the right viewport edge, go left
-                 return 'left';
-               } // prefer right tooltips
 
+             return Array.isArray(tags[d]);
+           }
 
-               return 'right';
-             } else {
-               // rtl
-               if (!menuLeft) {
-                 return 'right';
-               }
-
-               if (anchorLoc[0] - _menuSideMargin - _menuWidth - _tooltipWidth < _vpSideMargin) {
-                 // left tooltips would be too close to the left viewport edge, go right
-                 return 'right';
-               } // prefer left tooltips
+           labels.classed('active', function (d) {
+             if (field.key) {
+               return Array.isArray(tags[field.key]) && tags[field.key].includes(d) || tags[field.key] === d;
+             }
 
+             return Array.isArray(tags[d]) || !!(tags[d] && tags[d].toLowerCase() !== 'no');
+           }).classed('mixed', isMixed).attr('title', function (d) {
+             return isMixed(d) ? _t('inspector.unshared_value_tooltip') : null;
+           });
+           var selection = radios.filter(function () {
+             return this.checked;
+           });
 
-               return 'left';
-             }
+           if (selection.empty()) {
+             placeholder.html(_t.html('inspector.none'));
+           } else {
+             placeholder.html(selection.attr('value'));
+             _oldType[selection.datum()] = tags[selection.datum()];
            }
-         }
 
-         editMenu.close = function () {
-           context.map().on('move.edit-menu', null).on('drawn.edit-menu', null);
-
-           _menu.remove();
+           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';
+             }
 
-           _tooltips = [];
-           dispatch$1.call('toggled', this, false);
+             wrap.call(structureExtras, tags);
+           }
          };
 
-         editMenu.anchorLoc = function (val) {
-           if (!arguments.length) return _anchorLoc;
-           _anchorLoc = val;
-           _anchorLocLonLat = context.projection.invert(_anchorLoc);
-           return editMenu;
+         radio.focus = function () {
+           radios.node().focus();
          };
 
-         editMenu.triggerType = function (val) {
-           if (!arguments.length) return _triggerType;
-           _triggerType = val;
-           return editMenu;
+         radio.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
+           _entityIDs = val;
+           _oldType = {};
+           return radio;
          };
 
-         editMenu.operations = function (val) {
-           if (!arguments.length) return _operations;
-           _operations = val;
-           return editMenu;
+         radio.isAllowed = function () {
+           return _entityIDs.length === 1;
          };
 
-         return utilRebind(editMenu, dispatch$1, 'on');
-       }
+         return utilRebind(radio, dispatch, 'on');
+       }
+
+       function uiFieldRestrictions(field, context) {
+         var dispatch = dispatch$8('change');
+         var breathe = behaviorBreathe();
+         corePreferences('turn-restriction-via-way', null); // remove old key
+
+         var storedViaWay = corePreferences('turn-restriction-via-way0'); // use new key #6922
 
-       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]
-               });
-             }
+         var storedDistance = corePreferences('turn-restriction-distance');
 
-             return null;
-           }).filter(Boolean);
-           selection.html('');
+         var _maxViaWay = storedViaWay !== null ? +storedViaWay : 0;
 
-           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 _maxDistance = storedDistance ? +storedDistance : 30;
 
-               context.ui().togglePanes(context.container().select('.map-panes .map-data-pane'));
-             });
-           }
+         var _initialized = false;
 
-           selection.classed('hide', !hiddenList.length);
-         }
+         var _parent = select(null); // the entire field
 
-         return function (selection) {
-           update(selection);
-           context.features().on('change.feature_info', function () {
-             update(selection);
-           });
-         };
-       }
 
-       function uiFlash(context) {
-         var _flashTimer;
+         var _container = select(null); // just the map
 
-         var _duration = 2000;
-         var _iconName = '#iD-icon-no';
-         var _iconClass = 'disabled';
-         var _label = '';
 
-         function flash() {
-           if (_flashTimer) {
-             _flashTimer.stop();
-           }
+         var _oldTurns;
 
-           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 _graph;
 
-           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
+         var _vertexID;
 
-           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;
-         }
+         var _intersection;
 
-         flash.duration = function (_) {
-           if (!arguments.length) return _duration;
-           _duration = _;
-           return flash;
-         };
+         var _fromWayID;
 
-         flash.label = function (_) {
-           if (!arguments.length) return _label;
-           _label = _;
-           return flash;
-         };
+         var _lastXPos;
 
-         flash.iconName = function (_) {
-           if (!arguments.length) return _iconName;
-           _iconName = _;
-           return flash;
-         };
+         function restrictions(selection) {
+           _parent = selection; // try to reuse the intersection, but always rebuild it if the graph has changed
 
-         flash.iconClass = function (_) {
-           if (!arguments.length) return _iconClass;
-           _iconClass = _;
-           return flash;
-         };
+           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 flash;
-       }
 
-       function uiFullScreen(context) {
-         var element = context.container().node(); // var button = d3_select(null);
+           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 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;
-           }
-         }
+           select(selection.node().parentNode).classed('hide', !isOK); // if form field is hidden or has detached from dom, clean up.
 
-         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 (!isOK || !context.container().select('.inspector-wrap.inspector-hidden').empty() || !selection.node().parentNode || !selection.node().parentNode.parentNode) {
+             selection.call(restrictions.off);
+             return;
            }
-         }
 
-         function isFullScreen() {
-           return document.fullscreenElement || document.mozFullScreenElement || document.webkitFullscreenElement || document.msFullscreenElement;
-         }
+           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 isSupported() {
-           return !!getFullScreenFn();
-         }
+           var containerEnter = container.enter().append('div').attr('class', 'restriction-container');
+           containerEnter.append('div').attr('class', 'restriction-help'); // update
 
-         function fullScreen(d3_event) {
-           d3_event.preventDefault();
+           _container = containerEnter.merge(container).call(renderViewer);
+           var controls = wrap.selectAll('.restriction-controls').data([0]); // enter/update
 
-           if (!isFullScreen()) {
-             // button.classed('active', true);
-             getFullScreenFn().apply(element);
-           } else {
-             // button.classed('active', false);
-             getExitFullScreenFn().apply(document);
-           }
+           controls.enter().append('div').attr('class', 'restriction-controls-container').append('div').attr('class', 'restriction-controls').merge(controls).call(renderControls);
          }
 
-         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 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
 
-           var detected = utilDetect();
-           var keys = detected.os === 'mac' ? [uiCmd('⌃⌘F'), 'f11'] : ['f11'];
-           context.keybinding().on(keys, fullScreen);
-         };
-       }
+           selection.selectAll('.restriction-distance-input').property('value', _maxDistance).on('input', function () {
+             var val = select(this).property('value');
+             _maxDistance = +val;
+             _intersection = 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
+             _container.selectAll('.layer-osm .layer-turns *').remove();
 
-         };
+             corePreferences('turn-restriction-distance', _maxDistance);
 
-         var _locating = uiLoading(context).message(_t.html('geolocate.locating')).blocking(true);
+             _parent.call(restrictions);
+           });
+           selection.selectAll('.restriction-distance-text').html(displayMaxDistance(_maxDistance));
+           var viaControl = selection.selectAll('.restriction-via-way').data([0]);
+           viaControl.exit().remove();
+           var viaControlEnter = viaControl.enter().append('div').attr('class', 'restriction-control restriction-via-way');
+           viaControlEnter.append('span').attr('class', 'restriction-control-label restriction-via-way-label').html(_t.html('restriction.controls.via') + ':');
+           viaControlEnter.append('input').attr('class', 'restriction-via-way-input').attr('type', 'range').attr('min', '0').attr('max', '2').attr('step', '1');
+           viaControlEnter.append('span').attr('class', 'restriction-via-way-text'); // update
 
-         var _layer = context.layers().layer('geolocate');
+           selection.selectAll('.restriction-via-way-input').property('value', _maxViaWay).on('input', function () {
+             var val = select(this).property('value');
+             _maxViaWay = +val;
 
-         var _position;
+             _container.selectAll('.layer-osm .layer-turns *').remove();
 
-         var _extent;
+             corePreferences('turn-restriction-via-way0', _maxViaWay);
 
-         var _timeoutID;
+             _parent.call(restrictions);
+           });
+           selection.selectAll('.restriction-via-way-text').html(displayMaxVia(_maxViaWay));
+         }
 
-         var _button = select(null);
+         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 click() {
-           if (context.inIntro()) return;
+           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
 
-           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
+           var extent = geoExtent();
 
-             navigator.geolocation.getCurrentPosition(success, error, _geolocationOptions);
-           } else {
-             _locating.close();
+           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
 
-             _layer.enabled(null, false);
 
-             updateButtonState();
+           if (_intersection.vertices.length > 1) {
+             var padding = 180; // in z22 pixels
+
+             var tl = projection([extent[0][0], extent[1][1]]);
+             var br = projection([extent[1][0], extent[0][1]]);
+             var hFactor = (br[0] - tl[0]) / (d[0] - padding);
+             var vFactor = (br[1] - tl[1]) / (d[1] - padding);
+             var hZoomDiff = Math.log(Math.abs(hFactor)) / Math.LN2;
+             var vZoomDiff = Math.log(Math.abs(vFactor)) / Math.LN2;
+             z = z - Math.max(hZoomDiff, vZoomDiff);
+             projection.scale(geoZoomToScale(z));
            }
-         }
 
-         function zoomTo() {
-           context.enter(modeBrowse(context));
-           var map = context.map();
+           var padTop = 35; // reserve top space for hint text
 
-           _layer.enabled(_position, true);
+           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);
 
-           updateButtonState();
-           map.centerZoomEase(_extent.center(), Math.min(20, map.extentZoom(_extent)));
-         }
+           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.
 
-         function success(geolocation) {
-           _position = geolocation;
-           var coords = _position.coords;
-           _extent = geoExtent([coords.longitude, coords.latitude]).padByMeters(coords.accuracy);
-           zoomTo();
-           finish();
-         }
 
-         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 (_fromWayID && !vgraph.hasEntity(_fromWayID)) {
+             _fromWayID = null;
+             _oldTurns = null;
            }
 
-           finish();
-         }
+           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;
 
-         function finish() {
-           _locating.close(); // unblock ui
+           if (_fromWayID) {
+             way = vgraph.entity(_fromWayID);
+             surface.selectAll('.' + _fromWayID).classed('selected', true).classed('related', true);
+           }
 
+           document.addEventListener('resizeWindow', function () {
+             utilSetDimensions(_container, null);
+             redraw(1);
+           }, false);
+           updateHints(null);
 
-           if (_timeoutID) {
-             clearTimeout(_timeoutID);
-           }
+           function click(d3_event) {
+             surface.call(breathe.off).call(breathe);
+             var datum = d3_event.target.__data__;
+             var entity = datum && datum.properties && datum.properties.entity;
 
-           _timeoutID = undefined;
-         }
+             if (entity) {
+               datum = entity;
+             }
 
-         function updateButtonState() {
-           _button.classed('active', _layer.enabled());
-         }
+             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);
 
-         return function (selection) {
-           if (!navigator.geolocation || !navigator.geolocation.getCurrentPosition) return;
-           _button = selection.append('button').on('click', click).call(svgIcon('#iD-icon-geolocate', 'light')).call(uiTooltip().placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left').title(_t.html('geolocate.title')).keys([_t('geolocate.key')]));
-           context.keybinding().on(_t('geolocate.key'), click);
-         };
-       }
+               if (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
 
-       function uiPanelBackground(context) {
-         var background = context.background();
-         var _currSourceName = null;
-         var _metadata = {};
-         var _metadataKeys = ['zoom', 'vintage', 'source', 'description', 'resolution', 'accuracy'];
+                 datumOnly.only = true; // but change this property
 
-         var debouncedRedraw = debounce(redraw, 250);
+                 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 redraw(selection) {
-           var source = background.baseLayerSource();
-           if (!source) return;
-           var isDG = source.id.match(/^DigitalGlobe/i) !== null;
-           var sourceLabel = source.label();
+                 turns = _intersection.turns(_fromWayID, 2);
+                 extraActions = [];
+                 _oldTurns = [];
 
-           if (_currSourceName !== sourceLabel) {
-             _currSourceName = sourceLabel;
-             _metadata = {};
-           }
+                 for (i = 0; i < turns.length; i++) {
+                   var turn = turns[i];
+                   if (seen[turn.restrictionID]) continue; // avoid deleting the turn twice (#4968, #4928)
 
-           selection.html('');
-           var list = selection.append('ul').attr('class', 'background-info');
-           list.append('li').html(_currSourceName);
+                   if (turn.direct && turn.path[1] === datum.path[1]) {
+                     seen[turns[i].restrictionID] = true;
+                     turn.restrictionType = osmInferRestriction(vgraph, turn, projection);
 
-           _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]);
-           });
+                     _oldTurns.push(turn);
 
-           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);
-           });
+                     extraActions.push(actionUnrestrictTurn(turn));
+                   }
+                 }
 
-           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
+                 actions = _intersection.actions.concat(extraActions, [actionRestrictTurn(datumOnly, restrictionType), _t('operations.restriction.annotation.create')]);
+               } else if (datum.restrictionID) {
+                 // ONLY -> Allowed
+                 // Restore whatever restrictions we might have destroyed by cycling thru the ONLY state.
+                 // This relies on the assumption that the intersection was already split up when we
+                 // performed the previous action (NO -> ONLY), so the IDs in _oldTurns shouldn't have changed.
+                 turns = _oldTurns || [];
+                 extraActions = [];
+
+                 for (i = 0; i < turns.length; i++) {
+                   if (turns[i].key !== datum.key) {
+                     extraActions.push(actionRestrictTurn(turns[i], turns[i].restrictionType));
+                   }
+                 }
 
+                 _oldTurns = null;
+                 actions = _intersection.actions.concat(extraActions, [actionUnrestrictTurn(datum), _t('operations.restriction.annotation.delete')]);
+               } else {
+                 // Allowed -> NO
+                 actions = _intersection.actions.concat([actionRestrictTurn(datum, restrictionType), _t('operations.restriction.annotation.create')]);
+               }
 
-           ['DigitalGlobe-Premium', 'DigitalGlobe-Standard'].forEach(function (layerId) {
-             if (source.id !== layerId) {
-               var key = layerId + '-vintage';
-               var sourceVintage = context.background().findSource(key);
+               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 (context.background().showsLayer(sourceVintage)) {
-                 context.background().toggleOverlayLayer(sourceVintage);
+               var s = surface.selectAll('.' + datum.key);
+               datum = s.empty() ? null : s.datum();
+               updateHints(datum);
+             } else {
+               _fromWayID = null;
+               _oldTurns = null;
+               redraw();
+             }
+           }
+
+           function mouseover(d3_event) {
+             var datum = d3_event.target.__data__;
+             updateHints(datum);
+           }
+
+           _lastXPos = _lastXPos || sdims[0];
+
+           function redraw(minChange) {
+             var xPos = -1;
+
+             if (minChange) {
+               xPos = utilGetDimensions(context.container().select('.sidebar'))[0];
+             }
+
+             if (!minChange || minChange && Math.abs(xPos - _lastXPos) >= minChange) {
+               if (context.hasEntity(_vertexID)) {
+                 _lastXPos = xPos;
+
+                 _container.call(renderViewer);
                }
              }
-           });
-         }
+           }
 
-         var debouncedGetMetadata = debounce(getMetadata, 250);
+           function highlightPathsFrom(wayID) {
+             surface.selectAll('.related').classed('related', false).classed('allow', false).classed('restrict', false).classed('only', false);
+             surface.selectAll('.' + wayID).classed('related', true);
 
-         function getMetadata(selection) {
-           var tile = context.container().select('.layer-background img.tile-center'); // tile near viewport center
+             if (wayID) {
+               var turns = _intersection.turns(wayID, _maxViaWay);
 
-           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
+               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';
 
-           _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
+                 if (turn.only || turns.length === 1) {
+                   if (turn.via.ways) {
+                     ids = ids.concat(turn.via.ways);
+                   }
+                 } else if (turn.to.way === wayID) {
+                   continue;
+                 }
 
-             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
+                 surface.selectAll(utilEntitySelector(ids)).classed('related', true).classed('allow', klass === 'allow').classed('restrict', klass === 'restrict').classed('only', klass === 'only');
+               }
+             }
+           }
 
-             _metadataKeys.forEach(function (k) {
-               if (k === 'zoom' || k === 'vintage') return; // done already
+           function updateHints(datum) {
+             var help = _container.selectAll('.restriction-help').html('');
 
-               var val = result[k];
-               _metadata[k] = val;
-               selection.selectAll('.background-info-list-' + k).classed('hide', !val).selectAll('.background-info-span-' + k).html(val);
+             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;
 
-         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);
-           });
-         };
+             if (entity) {
+               datum = entity;
+             }
 
-         panel.off = function () {
-           context.map().on('drawn.info-background', null).on('move.info-background', null);
-         };
+             if (_fromWayID) {
+               way = vgraph.entity(_fromWayID);
+               surface.selectAll('.' + _fromWayID).classed('selected', true).classed('related', true);
+             } // Hovering a way
 
-         panel.id = 'background';
-         panel.label = _t.html('info_panels.background.title');
-         panel.key = _t('info_panels.background.key');
-         return panel;
-       }
 
-       function uiPanelHistory(context) {
-         var osm;
+             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;
 
-         function displayTimestamp(timestamp) {
-           if (!timestamp) return _t('info_panels.history.unknown');
-           var options = {
-             day: 'numeric',
-             month: 'short',
-             year: 'numeric',
-             hour: 'numeric',
-             minute: 'numeric',
-             second: 'numeric'
-           };
-           var d = new Date(timestamp);
-           if (isNaN(d.getTime())) return _t('info_panels.history.unknown');
-           return d.toLocaleString(_mainLocalizer.localeCode(), options);
-         }
+               if (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: ''
+                 });
+               }
 
-         function displayUser(selection, userName) {
-           if (!userName) {
-             selection.append('span').html(_t.html('info_panels.history.unknown'));
-             return;
-           }
+               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)
+               }));
 
-           selection.append('span').attr('class', 'user-name').html(userName);
-           var links = selection.append('div').attr('class', 'links');
+               if (datum.via.ways && datum.via.ways.length) {
+                 var names = [];
 
-           if (osm) {
-             links.append('a').attr('class', 'user-osm-link').attr('href', osm.userURL(userName)).attr('target', '_blank').html('OSM');
-           }
+                 for (var i = 0; i < datum.via.ways.length; i++) {
+                   var prev = names[names.length - 1];
+                   var curr = displayName(datum.via.ways[i], vgraph);
 
-           links.append('a').attr('class', 'user-hdyc-link').attr('href', 'https://hdyc.neis-one.org/?' + userName).attr('target', '_blank').attr('tabindex', -1).html('HDYC');
-         }
+                   if (!prev || curr !== prev) {
+                     // collapse identical names
+                     names.push(curr);
+                   }
+                 }
 
-         function displayChangeset(selection, changeset) {
-           if (!changeset) {
-             selection.append('span').html(_t.html('info_panels.history.unknown'));
-             return;
-           }
+                 help.append('div') // "VIA {viaNames}"
+                 .html(_t.html('restriction.help.via_names', {
+                   via: placeholders.via,
+                   viaNames: names.join(', ')
+                 }));
+               }
 
-           selection.append('span').attr('class', 'changeset-id').html(changeset);
-           var links = selection.append('div').attr('class', 'links');
+               if (!indirect) {
+                 help.append('div') // Click for "No Right Turn"
+                 .html(_t.html('restriction.help.toggle', {
+                   turn: nextText.trim()
+                 }));
+               }
 
-           if (osm) {
-             links.append('a').attr('class', 'changeset-osm-link').attr('href', osm.changesetURL(changeset)).attr('target', '_blank').html('OSM');
-           }
+               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);
 
-           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');
+               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 redraw(selection) {
-           var selectedNoteID = context.selectedNoteID();
-           osm = context.connection();
-           var selected, note, entity;
+         function displayMaxDistance(maxDist) {
+           var isImperial = !_mainLocalizer.usesMetric();
+           var opts;
 
-           if (selectedNoteID && osm) {
-             // selected 1 note
-             selected = [_t('note.note') + ' ' + selectedNoteID];
-             note = osm.getNote(selectedNoteID);
+           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 {
-             // selected 1..n entities
-             selected = context.selectedIDs().filter(function (e) {
-               return context.hasEntity(e);
-             });
-
-             if (selected.length) {
-               entity = context.entity(selected[0]);
-             }
+             opts = {
+               distance: _t('units.meters', {
+                 quantity: maxDist
+               })
+             };
            }
 
-           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;
+           return _t.html('restriction.controls.distance_up_to', opts);
+         }
 
-           if (entity) {
-             selection.call(redrawEntity, entity);
-           } else if (note) {
-             selection.call(redrawNote, note);
-           }
+         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 redrawNote(selection, note) {
-           if (!note || note.isNew()) {
-             selection.append('div').html(_t.html('info_panels.history.note_no_history'));
-             return;
-           }
+         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;
+         }
 
-           var list = selection.append('ul');
-           list.append('li').html(_t.html('info_panels.history.note_comments') + ':').append('span').html(note.comments.length);
+         restrictions.entityIDs = function (val) {
+           _intersection = null;
+           _fromWayID = null;
+           _oldTurns = null;
+           _vertexID = val[0];
+         };
 
-           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);
-           }
+         restrictions.tags = function () {};
 
-           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'));
-           }
-         }
+         restrictions.focus = function () {};
 
-         function redrawEntity(selection, entity) {
-           if (!entity || entity.isNew()) {
-             selection.append('div').html(_t.html('info_panels.history.no_history'));
-             return;
-           }
+         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);
+         };
 
-           var links = selection.append('div').attr('class', 'links');
+         return utilRebind(restrictions, dispatch, 'on');
+       }
+       uiFieldRestrictions.supportsMultiselection = false;
 
-           if (osm) {
-             links.append('a').attr('class', 'view-history-on-osm').attr('href', osm.historyURL(entity)).attr('target', '_blank').attr('title', _t('info_panels.history.link_text')).html('OSM');
-           }
+       function uiFieldTextarea(field, context) {
+         var dispatch = dispatch$8('change');
+         var input = select(null);
 
-           links.append('a').attr('class', 'pewu-history-viewer-link').attr('href', 'https://pewu.github.io/osm-history/#/' + entity.type + '/' + entity.osmId()).attr('target', '_blank').attr('tabindex', -1).html('PeWu');
-           var list = selection.append('ul');
-           list.append('li').html(_t.html('info_panels.history.version') + ':').append('span').html(entity.version);
-           list.append('li').html(_t.html('info_panels.history.last_edit') + ':').append('span').html(displayTimestamp(entity.timestamp));
-           list.append('li').html(_t.html('info_panels.history.edited_by') + ':').call(displayUser, entity.user);
-           list.append('li').html(_t.html('info_panels.history.changeset') + ':').call(displayChangeset, entity.changeset);
+         var _tags;
+
+         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 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);
-           });
+         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);
          };
 
-         panel.off = function () {
-           context.map().on('drawn.info-history', null);
-           context.on('enter.info-history', null);
+         textarea.focus = function () {
+           input.node().focus();
          };
 
-         panel.id = 'history';
-         panel.label = _t.html('info_panels.history.title');
-         panel.key = _t('info_panels.history.key');
-         return panel;
+         return utilRebind(textarea, dispatch, 'on');
        }
 
-       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 getOwnPropertyDescriptor = objectGetOwnPropertyDescriptor.f;
 
-       function displayLength(m, isImperial) {
-         var d = m * (isImperial ? 3.28084 : 1);
-         var unit;
 
-         if (isImperial) {
-           if (d >= 5280) {
-             d /= 5280;
-             unit = 'miles';
-           } else {
-             unit = 'feet';
-           }
-         } else {
-           if (d >= 1000) {
-             d /= 1000;
-             unit = 'kilometers';
-           } else {
-             unit = 'meters';
-           }
-         }
 
-         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 (isImperial) {
-           if (d >= 6969600) {
-             // > 0.25mi² show mi²
-             d1 = d / 27878400;
-             unit1 = 'square_miles';
-           } else {
-             d1 = d;
-             unit1 = 'square_feet';
-           }
 
-           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';
-           }
+       // eslint-disable-next-line es/no-string-prototype-endswith -- safe
+       var $endsWith = ''.endsWith;
+       var min = Math.min;
 
-           if (d > 1000 && d < 10000000) {
-             // 0.1 - 1000 hectares
-             d2 = d / 10000;
-             unit2 = 'hectares';
-           }
+       var CORRECT_IS_REGEXP_LOGIC = correctIsRegexpLogic('endsWith');
+       // https://github.com/zloirock/core-js/pull/702
+       var MDN_POLYFILL_BUG = !CORRECT_IS_REGEXP_LOGIC && !!function () {
+         var descriptor = getOwnPropertyDescriptor(String.prototype, 'endsWith');
+         return descriptor && !descriptor.writable;
+       }();
+
+       // `String.prototype.endsWith` method
+       // https://tc39.es/ecma262/#sec-string.prototype.endswith
+       _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(toLength(endPosition), len);
+           var search = String(searchString);
+           return $endsWith
+             ? $endsWith.call(that, search, end)
+             : that.slice(end - search.length, end) === search;
          }
+       });
 
-         area = _t('units.' + unit1, {
-           quantity: d1.toLocaleString(locale, {
-             maximumSignificantDigits: 4
-           })
-         });
+       function uiFieldWikidata(field, context) {
+         var wikidata = services.wikidata;
+         var dispatch = dispatch$8('change');
 
-         if (d2) {
-           return _t('units.area_pair', {
-             area1: area,
-             area2: _t('units.' + unit2, {
-               quantity: d2.toLocaleString(locale, {
-                 maximumSignificantDigits: 2
-               })
-             })
-           });
-         } else {
-           return area;
-         }
-       }
+         var _selection = select(null);
 
-       function wrap$2(x, min, max) {
-         var d = max - min;
-         return ((x - min) % d + d) % d + min;
-       }
+         var _searchInput = select(null);
 
-       function clamp$1(x, min, max) {
-         return Math.max(min, Math.min(x, max));
-       }
+         var _qid = null;
+         var _wikidataEntity = null;
+         var _wikiURL = '';
+         var _entityIDs = [];
 
-       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;
+         var _wikipediaKey = field.keys && field.keys.find(function (key) {
+           return key.includes('wikipedia');
+         }),
+             _hintKey = field.key === 'wikidata' ? 'name' : field.key.split(':')[0];
 
-         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)
+         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();
            });
-         } else {
-           displayCoordinate = _t('units.arcdegrees', {
-             quantity: Math.round(Math.abs(deg)).toLocaleString(locale)
+           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
 
-         if (deg === 0) {
-           return displayCoordinate;
-         } else {
-           return _t('units.coordinate', {
-             coordinate: displayCoordinate,
-             direction: _t('units.' + (deg > 0 ? pos : neg))
+           var enter = items.enter().append('li').attr('class', function (d) {
+             return 'labeled-input preset-wikidata-' + d;
            });
-         }
-       }
-       /**
-        * Returns given coordinate pair in degree-minute-second format.
-        *
-        * @param {Array<Number>} coord longitude and latitude
-        */
-
+           enter.append('span').attr('class', 'label').html(function (d) {
+             return _t.html('wikidata.' + d);
+           });
+           enter.append('input').attr('type', 'text').call(utilNoAuto).classed('disabled', 'true').attr('readonly', 'true');
+           enter.append('button').attr('class', 'form-field-button').attr('title', _t('icons.copy')).call(svgIcon('#iD-operation-copy')).on('click', function (d3_event) {
+             d3_event.preventDefault();
+             select(this.parentNode).select('input').node().select();
+             document.execCommand('copy');
+           });
+         }
 
-       function 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
-        */
+         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 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)
-         });
-       }
+               if (entity.tags[_hintKey]) {
+                 q = entity.tags[_hintKey];
+                 break;
+               }
+             }
+           }
 
-       function uiPanelLocation(context) {
-         var currLocation = '';
+           wikidata.itemsForSearchQuery(q, function (err, data) {
+             if (err) return;
 
-         function redraw(selection) {
-           selection.html('');
-           var list = selection.append('ul'); // Mouse coordinates
+             for (var i in data) {
+               data[i].value = data[i].label + ' (' + data[i].id + ')';
+               data[i].title = data[i].description;
+             }
 
-           var coord = context.map().mouseCoordinates();
+             if (callback) callback(data);
+           });
+         }
 
-           if (coord.some(isNaN)) {
-             coord = context.map().center();
-           }
+         function change() {
+           var syncTags = {};
+           syncTags[field.key] = _qid;
+           dispatch.call('change', this, syncTags); // attempt asynchronous update of wikidata tag..
 
-           list.append('li').html(dmsCoordinatePair(coord)).append('li').html(decimalCoordinatePair(coord)); // Location Info
+           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.
 
-           selection.append('div').attr('class', 'location-info').html(currLocation || ' ');
-           debouncedGetLocation(selection, coord);
-         }
+             if (context.graph() !== initGraph) return;
+             if (!entity.sitelinks) return;
+             var langs = wikidata.languagesToQuery(); // use the label and description languages as fallbacks
 
-         var debouncedGetLocation = debounce(getLocation, 250);
+             ['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 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);
+               if (langs.indexOf(valueLang) === -1) {
+                 langs.push(valueLang);
+               }
              });
-           }
-         }
-
-         var panel = function panel(selection) {
-           selection.call(redraw);
-           context.surface().on(('PointerEvent' in window ? 'pointer' : 'mouse') + 'move.info-location', function () {
-             selection.call(redraw);
-           });
-         };
+             var newWikipediaValue;
 
-         panel.off = function () {
-           context.surface().on('.info-location', null);
-         };
+             if (_wikipediaKey) {
+               var foundPreferred;
 
-         panel.id = 'location';
-         panel.label = _t.html('info_panels.location.title');
-         panel.key = _t('info_panels.location.key');
-         return panel;
-       }
+               for (var i in langs) {
+                 var lang = langs[i];
+                 var siteID = lang.replace('-', '_') + 'wiki';
 
-       function uiPanelMeasurement(context) {
-         function radiansToMeters(r) {
-           // using WGS84 authalic radius (6371007.1809 m)
-           return r * 6371007.1809;
-         }
+                 if (entity.sitelinks[siteID]) {
+                   foundPreferred = true;
+                   newWikipediaValue = lang + ':' + entity.sitelinks[siteID].title; // use the first match
 
-         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: []
-           };
+               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 (feature.type === 'Polygon') {
-             result.coordinates = feature.coordinates[0];
-           } else if (feature.type === 'MultiPolygon') {
-             result.coordinates = feature.coordinates[0][0];
-           }
+                 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;
+                 }
+               }
+             }
 
-           return result;
-         }
+             if (newWikipediaValue) {
+               newWikipediaValue = context.cleanTagValue(newWikipediaValue);
+             }
 
-         var _isImperial = !_mainLocalizer.usesMetric();
+             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 redraw(selection) {
-           var graph = context.graph();
-           var selectedNoteID = context.selectedNoteID();
-           var osm = services.osm;
-           var localeCode = _mainLocalizer.localeCode();
-           var heading;
-           var center, location, centroid;
-           var closed, geometry;
-           var totalNodeCount,
-               length = 0,
-               area = 0,
-               distance;
+               if (newWikipediaValue === null) {
+                 if (!currTags[_wikipediaKey]) return null;
+                 delete currTags[_wikipediaKey];
+               } else {
+                 currTags[_wikipediaKey] = newWikipediaValue;
+               }
 
-           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
-             });
+               return actionChangeTags(entityID, currTags);
+             }).filter(Boolean);
+             if (!actions.length) return; // Coalesce the update of wikidata tag into the previous tag change
 
-             if (selected.length) {
-               var extent = geoExtent();
+             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
+           });
+         }
 
-               for (var i in selected) {
-                 var entity = selected[i];
+         function setLabelForEntity() {
+           var label = '';
 
-                 extent._extend(entity.extent(graph));
+           if (_wikidataEntity) {
+             label = entityPropertyForDisplay(_wikidataEntity, 'labels');
 
-                 geometry = entity.geometry(graph);
+             if (label.length === 0) {
+               label = _wikidataEntity.id.toString();
+             }
+           }
 
-                 if (geometry === 'line' || geometry === 'area') {
-                   closed = entity.type === 'relation' || entity.isClosed() && !entity.isDegenerate();
-                   var feature = entity.asGeoJSON(graph);
-                   length += radiansToMeters(d3_geoLength(toLineString(feature))); // d3_geoCentroid is wrong for counterclockwise-wound polygons, so wind them clockwise
+           utilGetSetValue(_searchInput, label);
+         }
 
-                   centroid = d3_geoCentroid(geojsonRewind(Object.assign({}, feature), true));
+         wiki.tags = function (tags) {
+           var isMixed = Array.isArray(tags[field.key]);
 
-                   if (closed) {
-                     area += steradiansToSqmeters(entity.area(graph));
-                   }
-                 }
-               }
+           _searchInput.attr('title', isMixed ? tags[field.key].filter(Boolean).join('\n') : null).attr('placeholder', isMixed ? _t('inspector.multiple_values') : '').classed('mixed', isMixed);
 
-               if (selected.length > 1) {
-                 geometry = null;
-                 closed = null;
-                 centroid = null;
-               }
+           _qid = typeof tags[field.key] === 'string' && tags[field.key] || '';
 
-               if (selected.length === 2 && selected[0].type === 'node' && selected[1].type === 'node') {
-                 distance = geoSphericalDistance(selected[0].loc, selected[1].loc);
-               }
+           if (!/^Q[0-9]*$/.test(_qid)) {
+             // not a proper QID
+             unrecognized();
+             return;
+           } // QID value in correct format
 
-               if (selected.length === 1 && selected[0].type === 'node') {
-                 location = selected[0].loc;
-               } else {
-                 totalNodeCount = utilGetAllNodes(selectedIDs, context.graph()).length;
-               }
 
-               if (!location && !centroid) {
-                 center = extent.center();
-               }
+           _wikiURL = 'https://wikidata.org/wiki/' + _qid;
+           wikidata.entityByQID(_qid, function (err, entity) {
+             if (err) {
+               unrecognized();
+               return;
              }
-           }
 
-           selection.html('');
+             _wikidataEntity = entity;
+             setLabelForEntity();
+             var description = entityPropertyForDisplay(entity, 'descriptions');
 
-           if (heading) {
-             selection.append('h4').attr('class', 'measurement-heading').html(heading);
-           }
+             _selection.select('button.wiki-link').classed('disabled', false);
 
-           var list = selection.append('ul');
-           var coordItem;
+             _selection.select('.preset-wikidata-description').style('display', function () {
+               return description.length > 0 ? 'flex' : 'none';
+             }).select('input').attr('value', description);
 
-           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));
-           }
+             _selection.select('.preset-wikidata-identifier').style('display', function () {
+               return entity.id ? 'flex' : 'none';
+             }).select('input').attr('value', entity.id);
+           }); // not a proper QID
 
-           if (totalNodeCount) {
-             list.append('li').html(_t.html('info_panels.measurement.node_count') + ':').append('span').html(totalNodeCount.toLocaleString(localeCode));
-           }
+           function unrecognized() {
+             _wikidataEntity = null;
+             setLabelForEntity();
 
-           if (area) {
-             list.append('li').html(_t.html('info_panels.measurement.area') + ':').append('span').html(displayArea(area, _isImperial));
-           }
+             _selection.select('.preset-wikidata-description').style('display', 'none');
 
-           if (length) {
-             list.append('li').html(_t.html('info_panels.measurement.' + (closed ? 'perimeter' : 'length')) + ':').append('span').html(displayLength(length, _isImperial));
-           }
+             _selection.select('.preset-wikidata-identifier').style('display', 'none');
 
-           if (typeof distance === 'number') {
-             list.append('li').html(_t.html('info_panels.measurement.distance') + ':').append('span').html(displayLength(distance, _isImperial));
-           }
+             _selection.select('button.wiki-link').classed('disabled', true);
 
-           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 (_qid && _qid !== '') {
+               _wikiURL = 'https://wikidata.org/wiki/Special:Search?search=' + _qid;
+             } else {
+               _wikiURL = '';
+             }
            }
+         };
 
-           if (centroid) {
-             coordItem = list.append('li').html(_t.html('info_panels.measurement.centroid') + ':');
-             coordItem.append('span').html(dmsCoordinatePair(centroid));
-             coordItem.append('span').html(decimalCoordinatePair(centroid));
-           }
+         function 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
 
-           if (center) {
-             coordItem = list.append('li').html(_t.html('info_panels.measurement.center') + ':');
-             coordItem.append('span').html(dmsCoordinatePair(center));
-             coordItem.append('span').html(decimalCoordinatePair(center));
-           }
+           var langs = wikidata.languagesToQuery();
 
-           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);
-             });
-           }
+           for (var i in langs) {
+             var lang = langs[i];
+             var valueObj = propObj[lang];
+             if (valueObj && valueObj.value && valueObj.value.length > 0) return valueObj.value;
+           } // default to any available value
+
+
+           return propObj[langKeys[0]].value;
          }
 
-         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);
-           });
+         wiki.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
+           _entityIDs = val;
+           return wiki;
          };
 
-         panel.off = function () {
-           context.map().on('drawn.info-measurement', null);
-           context.on('enter.info-measurement', null);
+         wiki.focus = function () {
+           _searchInput.node().focus();
          };
 
-         panel.id = 'measurement';
-         panel.label = _t.html('info_panels.measurement.title');
-         panel.key = _t('info_panels.measurement.key');
-         return panel;
+         return utilRebind(wiki, dispatch, 'on');
        }
 
-       var uiInfoPanels = {
-         background: uiPanelBackground,
-         history: uiPanelHistory,
-         location: uiPanelLocation,
-         measurement: uiPanelMeasurement
-       };
+       function uiFieldWikipedia(field, context) {
+         var _arguments = arguments;
+         var dispatch = dispatch$8('change');
+         var wikipedia = services.wikipedia;
+         var wikidata = services.wikidata;
 
-       function uiInfo(context) {
-         var ids = Object.keys(uiInfoPanels);
-         var wasActive = ['measurement'];
-         var panels = {};
-         var active = {}; // create panels
+         var _langInput = select(null);
 
-         ids.forEach(function (k) {
-           if (!panels[k]) {
-             panels[k] = uiInfoPanels[k](context);
-             active[k] = false;
-           }
-         });
+         var _titleInput = select(null);
 
-         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
+         var _wikiURL = '';
 
-             infoPanels.selectAll('.panel-content').each(function (d) {
-               select(this).call(panels[d]);
-             });
-           }
+         var _entityIDs;
 
-           info.toggle = function (which) {
-             var activeids = ids.filter(function (k) {
-               return active[k];
-             });
+         var _tags;
 
-             if (which) {
-               // toggle one
-               active[which] = !active[which];
+         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 (activeids.length === 1 && activeids[0] === which) {
-                 // none active anymore
-                 wasActive = [which];
-               }
+             for (var i in _entityIDs) {
+               var entity = context.hasEntity(_entityIDs[i]);
 
-               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;
-                 });
+               if (entity.tags.name) {
+                 value = entity.tags.name;
+                 break;
                }
              }
+           }
 
-             redraw();
-           };
+           var searchfn = value.length > 7 ? wikipedia.search : wikipedia.suggestions;
+           searchfn(language()[2], value, function (query, data) {
+             callback(data.map(function (d) {
+               return {
+                 value: d
+               };
+             }));
+           });
+         });
 
-           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();
+         function wiki(selection) {
+           var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+           wrap = wrap.enter().append('div').attr('class', "form-field-input-wrap form-field-input-".concat(field.type)).merge(wrap);
+           var langContainer = wrap.selectAll('.wiki-lang-container').data([0]);
+           langContainer = langContainer.enter().append('div').attr('class', 'wiki-lang-container').merge(langContainer);
+           _langInput = langContainer.selectAll('input.wiki-lang').data([0]);
+           _langInput = _langInput.enter().append('input').attr('type', 'text').attr('class', 'wiki-lang').attr('placeholder', _t('translate.localized_translation_language')).call(utilNoAuto).call(langCombo).merge(_langInput);
+
+           _langInput.on('blur', changeLang).on('change', changeLang);
+
+           var titleContainer = wrap.selectAll('.wiki-title-container').data([0]);
+           titleContainer = titleContainer.enter().append('div').attr('class', 'wiki-title-container').merge(titleContainer);
+           _titleInput = titleContainer.selectAll('input.wiki-title').data([0]);
+           _titleInput = _titleInput.enter().append('input').attr('type', 'text').attr('class', 'wiki-title').attr('id', field.domId).call(utilNoAuto).call(titleCombo).merge(_titleInput);
+
+           _titleInput.on('blur', function () {
+             change(true);
+           }).on('change', function () {
+             change(false);
            });
-           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 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');
            });
          }
 
-         return info;
-       }
+         function defaultLanguageInfo(skipEnglishFallback) {
+           var langCode = _mainLocalizer.languageCode().toLowerCase();
 
-       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;
+           for (var i in _dataWikipedia) {
+             var d = _dataWikipedia[i]; // default to the language of iD's current locale
 
-         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;
+             if (d[2] === langCode) return d;
+           } // fallback to English
+
+
+           return skipEnglishFallback ? ['', '', ''] : ['English', 'English', 'en'];
          }
 
-         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 language(skipEnglishFallback) {
+           var value = utilGetSetValue(_langInput).toLowerCase();
 
-       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;
+           for (var i in _dataWikipedia) {
+             var d = _dataWikipedia[i]; // return the language already set in the UI, if supported
 
-         if (replacements) {
-           reps = Object.assign(replacements, helpStringReplacements);
-         } else {
-           reps = helpStringReplacements;
+             if (d[0].toLowerCase() === value || d[1].toLowerCase() === value || d[2] === value) return d;
+           } // fallback to English
+
+
+           return defaultLanguageInfo(skipEnglishFallback);
          }
 
-         return _t.html(id, reps) // use keyboard key styling for shortcuts
-         .replace(/\`(.*?)\`/g, '<kbd>$1</kbd>');
-       }
+         function changeLang() {
+           utilGetSetValue(_langInput, language()[1]);
+           change(true);
+         }
 
-       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 change(skipWikidata) {
+           var value = utilGetSetValue(_titleInput);
+           var m = value.match(/https?:\/\/([-a-z]+)\.wikipedia\.org\/(?:wiki|\1-[-a-z]+)\/([^#]+)(?:#(.+))?/);
 
+           var langInfo = m && _dataWikipedia.find(function (d) {
+             return m[1] === d[2];
+           });
 
-       var missingStrings = {};
+           var syncTags = {};
 
-       function checkKey(key, text) {
-         if (_t(key, {
-           "default": undefined
-         }) === undefined) {
-           if (missingStrings.hasOwnProperty(key)) return; // warn once
+           if (langInfo) {
+             var nativeLangName = langInfo[1]; // Normalize title http://www.mediawiki.org/wiki/API:Query#Title_normalization
 
-           missingStrings[key] = text;
-           var missing = key + ': ' + text;
-           if (typeof console !== 'undefined') console.log(missing); // eslint-disable-line
-         }
-       }
+             value = decodeURIComponent(m[2]).replace(/_/g, ' ');
 
-       function localize(obj) {
-         var key; // Assign name if entity has one..
+             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) {
 
-         var name = obj.tags && obj.tags.name;
+               anchor = decodeURIComponent(m[3]); // }
 
-         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..
+               value += '#' + anchor.replace(/_/g, ' ');
+             }
 
+             value = value.slice(0, 1).toUpperCase() + value.slice(1);
+             utilGetSetValue(_langInput, nativeLangName);
+             utilGetSetValue(_titleInput, value);
+           }
 
-         var street = obj.tags && obj.tags['addr:street'];
+           if (value) {
+             syncTags.wikipedia = context.cleanTagValue(language()[2] + ':' + value);
+           } else {
+             syncTags.wikipedia = undefined;
+           }
 
-         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..
+           dispatch.call('change', this, syncTags);
+           if (skipWikidata || !value || !language()[2]) return; // attempt asynchronous update of wikidata tag..
 
-           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
+           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.
+
+             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 (str) {
-               if (str.match(/^<.*>$/) !== null) {
-                 delete obj.tags[tag];
-               } else {
-                 obj.tags[tag] = str;
+               if (currTags.wikidata !== value) {
+                 currTags.wikidata = value;
+                 return actionChangeTags(entityID, currTags);
                }
-             }
+
+               return null;
+             }).filter(Boolean);
+             if (!actions.length) return; // Coalesce the update of wikidata tag into the previous tag change
+
+             context.overwrite(function actionUpdateWikidataTags(graph) {
+               actions.forEach(function (action) {
+                 graph = action(graph);
+               });
+               return graph;
+             }, context.history().undoAnnotation()); // do not dispatch.call('change') here, because entity_editor
+             // changeTags() is not intended to be called asynchronously
            });
          }
 
-         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
+         wiki.tags = function (tags) {
+           _tags = tags;
+           updateForTags(tags);
+         };
 
-         var lowerBound = Math.cos((90 - threshold) * Math.PI / 180); // near right
+         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`
 
-         var upperBound = Math.cos(threshold * Math.PI / 180); // near straight
+           var m = value.match(/([^:]+):([^#]+)(?:#(.+))?/);
+           var tagLang = m && m[1];
+           var tagArticleTitle = m && m[2];
+           var anchor = m && m[3];
 
-         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);
+           var tagLangInfo = tagLang && _dataWikipedia.find(function (d) {
+             return tagLang === d[2];
+           }); // value in correct format
 
-           if (mag > lowerBound && mag < upperBound) {
-             return false;
-           }
-         }
 
-         return true;
-       }
-       function selectMenuItem(context, operation) {
-         return context.container().select('.edit-menu .edit-menu-item-' + operation);
-       }
-       function transitionTime(point1, point2) {
-         var distance = geoSphericalDistance(point1, point2);
-         if (distance === 0) return 0;else if (distance < 80) return 500;else return 1000;
-       }
+           if (tagLangInfo) {
+             var nativeLangName = tagLangInfo[1];
+             utilGetSetValue(_langInput, nativeLangName);
+             utilGetSetValue(_titleInput, tagArticleTitle + (anchor ? '#' + anchor : ''));
 
-       function uiCurtain(containerNode) {
-         var surface = select(null),
-             tooltip = select(null),
-             darkness = select(null);
+             if (anchor) {
+               try {
+                 // Best-effort `anchorencode:` implementation
+                 anchor = encodeURIComponent(anchor.replace(/ /g, '_')).replace(/%/g, '.');
+               } catch (e) {
+                 anchor = anchor.replace(/ /g, '_');
+               }
+             }
 
-         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();
+             _wikiURL = 'https://' + tagLang + '.wikipedia.org/wiki/' + tagArticleTitle.replace(/ /g, '_') + (anchor ? '#' + anchor : ''); // unrecognized value format
+           } else {
+             utilGetSetValue(_titleInput, value);
 
-           function resize() {
-             surface.attr('width', containerNode.clientWidth).attr('height', containerNode.clientHeight);
-             curtain.cut(darkness.datum());
+             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 = '';
+             }
            }
          }
-         /**
-          * 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
-          */
 
+         wiki.entityIDs = function (val) {
+           if (!_arguments.length) return _entityIDs;
+           _entityIDs = val;
+           return wiki;
+         };
 
-         curtain.reveal = function (box, html, options) {
-           options = options || {};
+         wiki.focus = function () {
+           _titleInput.node().focus();
+         };
 
-           if (typeof box === 'string') {
-             box = select(box).node();
-           }
+         return utilRebind(wiki, dispatch, 'on');
+       }
+       uiFieldWikipedia.supportsMultiselection = false;
 
-           if (box && box.getBoundingClientRect) {
-             box = copyBox(box.getBoundingClientRect());
-             var containerRect = containerNode.getBoundingClientRect();
-             box.top -= containerRect.top;
-             box.left -= containerRect.left;
-           }
+       var uiFields = {
+         access: uiFieldAccess,
+         address: uiFieldAddress,
+         check: uiFieldCheck,
+         combo: uiFieldCombo,
+         cycleway: uiFieldCycleway,
+         defaultCheck: uiFieldCheck,
+         email: uiFieldText,
+         identifier: uiFieldText,
+         lanes: uiFieldLanes,
+         localized: uiFieldLocalized,
+         roadspeed: uiFieldRoadspeed,
+         roadheight: uiFieldText,
+         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 (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;
-           }
+       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
 
-           var tooltipBox;
+         field.domId = utilUniqueDomId('form-field-' + field.safeid);
+         var _show = options.show;
+         var _state = '';
+         var _tags = {};
 
-           if (options.tooltipBox) {
-             tooltipBox = options.tooltipBox;
+         var _entityExtent;
 
-             if (typeof tooltipBox === 'string') {
-               tooltipBox = select(tooltipBox).node();
-             }
+         if (entityIDs && entityIDs.length) {
+           _entityExtent = entityIDs.reduce(function (extent, entityID) {
+             var entity = context.graph().entity(entityID);
+             return extent.extend(entity.extent(context.graph()));
+           }, geoExtent());
+         }
 
-             if (tooltipBox && tooltipBox.getBoundingClientRect) {
-               tooltipBox = copyBox(tooltipBox.getBoundingClientRect());
-             }
-           } else {
-             tooltipBox = box;
-           }
+         var _locked = false;
 
-           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..
+         var _lockedTip = uiTooltip().title(_t.html('inspector.lock.suggestion', {
+           label: field.label
+         })).placement('bottom');
 
+         field.keys = field.keys || [field.key]; // only create the fields that are actually being shown
 
-               html = html.replace(/\*\*(.*?)\*\*/g, '<span class="instruction">$1</span>');
-             }
+         if (_show && !field.impl) {
+           createField();
+         } // Creates the field.. This is done lazily,
+         // once we know that the field will be shown.
 
-             html = html.replace(/\*(.*?)\*/g, '<em>$1</em>'); // emphasis
 
-             html = html.replace(/\{br\}/g, '<br/><br/>'); // linebreak
+         function createField() {
+           field.impl = uiFields[field.type](field, context).on('change', function (t, onInput) {
+             dispatch.call('change', field, t, onInput);
+           });
 
-             if (options.buttonText && options.buttonCallback) {
-               html += '<div class="button-section">' + '<button href="#" class="button action">' + options.buttonText + '</button></div>';
+           if (entityIDs) {
+             field.entityIDs = entityIDs; // if this field cares about the entities, pass them along
+
+             if (field.impl.entityIDs) {
+               field.impl.entityIDs(entityIDs);
              }
+           }
+         }
 
-             var classes = 'curtain-tooltip popover tooltip arrowed in ' + (options.tooltipClass || '');
-             tooltip.classed(classes, true).selectAll('.popover-inner').html(html);
+         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];
+             });
+           });
+         }
 
-             if (options.buttonText && options.buttonCallback) {
-               var button = tooltip.selectAll('.button-section .button.action');
-               button.on('click', function (d3_event) {
-                 d3_event.preventDefault();
-                 options.buttonCallback();
-               });
+         function tagsContainFieldKey() {
+           return field.keys.some(function (key) {
+             if (field.type === 'multiCombo') {
+               for (var tagKey in _tags) {
+                 if (tagKey.indexOf(key) === 0) {
+                   return true;
+                 }
+               }
+
+               return false;
              }
 
-             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 _tags[key] !== undefined;
+           });
+         }
 
-             if (options.tooltipClass === 'intro-mouse') {
-               tip.height += 80;
-             } // trim box dimensions to just the portion that fits in the container..
+         function revert(d3_event, d) {
+           d3_event.stopPropagation();
+           d3_event.preventDefault();
+           if (!entityIDs || _locked) return;
+           dispatch.call('revert', d, d.keys);
+         }
 
+         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);
+         }
 
-             if (tooltipBox.top + tooltipBox.height > h) {
-               tooltipBox.height -= tooltipBox.top + tooltipBox.height - h;
-             }
+         field.render = function (selection) {
+           var container = selection.selectAll('.form-field').data([field]); // Enter
 
-             if (tooltipBox.left + tooltipBox.width > w) {
-               tooltipBox.width -= tooltipBox.left + tooltipBox.width - w;
-             } // determine tooltip placement..
+           var enter = container.enter().append('div').attr('class', function (d) {
+             return 'form-field form-field-' + d.safeid;
+           }).classed('nowrap', !options.wrap);
 
+           if (options.wrap) {
+             var labelEnter = enter.append('label').attr('class', 'field-label').attr('for', function (d) {
+               return d.domId;
+             });
+             var textEnter = labelEnter.append('span').attr('class', 'label-text');
+             textEnter.append('span').attr('class', 'label-textvalue').html(function (d) {
+               return d.label();
+             });
+             textEnter.append('span').attr('class', 'label-textannotation');
 
-             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;
+             if (options.remove) {
+               labelEnter.append('button').attr('class', 'remove-icon').attr('title', _t('icons.remove')).call(svgIcon('#iD-operation-delete'));
+             }
 
-               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.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
+
+
+           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 (options.duration !== 0 || !tooltip.classed(side)) {
-               tooltip.call(uiToggle(true));
+             if (!d.impl) {
+               createField();
              }
 
-             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 reference, help; // instantiate field help
 
-             var shiftY = 0;
+             if (options.wrap && field.type === 'restrictions') {
+               help = uiFieldHelp(context, 'restrictions');
+             } // instantiate tag reference
 
-             if (side === 'left' || side === 'right') {
-               if (pos[1] < 60) {
-                 shiftY = 60 - pos[1];
-               } else if (pos[1] + tip.height > h - 100) {
-                 shiftY = h - pos[1] - tip.height - 100;
-               }
-             }
 
-             tooltip.selectAll('.popover-inner').style('top', shiftY + 'px');
-           } else {
-             tooltip.classed('in', false).call(uiToggle(false));
-           }
+             if (options.wrap && options.info) {
+               var referenceKey = d.key || '';
 
-           curtain.cut(box, options.duration);
-           return tooltip;
-         };
+               if (d.type === 'multiCombo') {
+                 // lookup key without the trailing ':'
+                 referenceKey = referenceKey.replace(/:$/, '');
+               }
 
-         curtain.cut = function (datum, duration) {
-           darkness.datum(datum).interrupt();
-           var selection;
+               reference = uiTagReference(d.reference || {
+                 key: referenceKey
+               });
 
-           if (duration === 0) {
-             selection = darkness;
-           } else {
-             selection = darkness.transition().duration(duration || 600).ease(linear$1);
-           }
+               if (_state === 'hover') {
+                 reference.showing(false);
+               }
+             }
 
-           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';
-           });
-         };
+             selection.call(d.impl); // add field help components
 
-         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 (help) {
+               selection.call(help.body).select('.field-label').call(help.button);
+             } // add tag reference components
 
 
-         function copyBox(src) {
-           return {
-             top: src.top,
-             right: src.right,
-             bottom: src.bottom,
-             left: src.left,
-             width: src.width,
-             height: src.height
-           };
-         }
+             if (reference) {
+               selection.call(reference.body).select('.field-label').call(reference.button);
+             }
 
-         return curtain;
-       }
+             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
 
-       function uiIntroWelcome(context, reveal) {
-         var dispatch$1 = dispatch('done');
-         var chapter = {
-           title: 'intro.welcome.title'
+           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 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
-           });
-         }
+         field.state = function (val) {
+           if (!arguments.length) return _state;
+           _state = val;
+           return field;
+         };
 
-         function practice() {
-           reveal('.intro-nav-wrap .chapter-welcome', helpHtml('intro.welcome.practice'), {
-             buttonText: _t.html('intro.ok'),
-             buttonCallback: words
-           });
-         }
+         field.tags = function (val) {
+           if (!arguments.length) return _tags;
+           _tags = val;
 
-         function words() {
-           reveal('.intro-nav-wrap .chapter-welcome', helpHtml('intro.welcome.words'), {
-             buttonText: _t.html('intro.ok'),
-             buttonCallback: chapters
-           });
-         }
+           if (tagsContainFieldKey() && !_show) {
+             // always show a field if it has a value to display
+             _show = true;
 
-         function chapters() {
-           dispatch$1.call('done');
-           reveal('.intro-nav-wrap .chapter-navigation', helpHtml('intro.welcome.chapters', {
-             next: _t('intro.navigation.title')
-           }));
-         }
+             if (!field.impl) {
+               createField();
+             }
+           }
 
-         chapter.enter = function () {
-           welcome();
+           return field;
          };
 
-         chapter.exit = function () {
-           context.container().select('.curtain-tooltip.intro-mouse').selectAll('.counter').remove();
+         field.locked = function (val) {
+           if (!arguments.length) return _locked;
+           _locked = val;
+           return field;
          };
 
-         chapter.restart = function () {
-           chapter.exit();
-           chapter.enter();
-         };
+         field.show = function () {
+           _show = true;
 
-         return utilRebind(chapter, dispatch$1, 'on');
-       }
+           if (!field.impl) {
+             createField();
+           }
 
-       function uiIntroNavigation(context, reveal) {
-         var dispatch$1 = dispatch('done');
-         var timeouts = [];
-         var hallId = 'n2061';
-         var townHall = [-85.63591, 41.94285];
-         var springStreetId = 'w397';
-         var springStreetEndId = 'n1834';
-         var springStreet = [-85.63582, 41.94255];
-         var onewayField = _mainPresetIndex.field('oneway');
-         var maxspeedField = _mainPresetIndex.field('maxspeed');
-         var chapter = {
-           title: 'intro.navigation.title'
-         };
+           if (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
 
-         function timeout(f, t) {
-           timeouts.push(window.setTimeout(f, t));
-         }
 
-         function eventCancel(d3_event) {
-           d3_event.stopPropagation();
-           d3_event.preventDefault();
-         }
+         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
 
-         function isTownHallSelected() {
-           var ids = context.selectedIDs();
-           return ids.length === 1 && ids[0] === hallId;
-         }
 
-         function dragMap() {
-           context.enter(modeBrowse(context));
-           context.history().reset('initial');
-           var msec = transitionTime(townHall, context.map().center());
+         field.isAllowed = function () {
+           if (entityIDs && entityIDs.length > 1 && uiFields[field.type].supportsMultiselection === false) return false;
+           if (field.geometry && !entityIDs.every(function (entityID) {
+             return field.matchGeometry(context.graph().geometry(entityID));
+           })) return false;
 
-           if (msec) {
-             reveal(null, null, {
-               duration: 0
-             });
+           if (entityIDs && _entityExtent && field.locationSetID) {
+             // is field allowed in this location?
+             var validLocations = _mainLocations.locationsAt(_entityExtent.center());
+             if (!validLocations[field.locationSetID]) return false;
            }
 
-           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();
+           var prerequisiteTag = field.prerequisiteTag;
 
-               if (centerStart[0] !== centerNow[0] || centerStart[1] !== centerNow[1]) {
-                 context.map().on('move.intro', null);
-                 timeout(function () {
-                   continueTo(zoomMap);
-                 }, 3000);
+           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;
                }
-             });
-           }, msec + 100);
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             nextStep();
+               return true;
+             })) return false;
            }
-         }
 
-         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);
-             }
-           });
+           return true;
+         };
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             nextStep();
+         field.focus = function () {
+           if (field.impl) {
+             field.impl.focus();
            }
-         }
+         };
 
-         function features() {
-           var onClick = function onClick() {
-             continueTo(pointsLinesAreas);
-           };
+         return utilRebind(field, dispatch, 'on');
+       }
 
-           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
-             });
+       function uiFormFields(context) {
+         var moreCombo = uiCombobox(context, 'more-fields').minItems(1);
+         var _fieldsArr = [];
+         var _lastPlaceholder = '';
+         var _state = '';
+         var _klass = '';
+
+         function formFields(selection) {
+           var allowedFields = _fieldsArr.filter(function (field) {
+             return field.isAllowed();
            });
 
-           function continueTo(nextStep) {
-             context.map().on('drawn.intro', null);
-             nextStep();
-           }
-         }
+           var shown = allowedFields.filter(function (field) {
+             return field.isShown();
+           });
+           var notShown = allowedFields.filter(function (field) {
+             return !field.isShown();
+           });
+           var container = selection.selectAll('.form-fields-container').data([0]);
+           container = container.enter().append('div').attr('class', 'form-fields-container ' + (_klass || '')).merge(container);
+           var fields = container.selectAll('.wrap-form-field').data(shown, function (d) {
+             return d.id + (d.entityIDs ? d.entityIDs.join() : '');
+           });
+           fields.exit().remove(); // Enter
 
-         function pointsLinesAreas() {
-           var onClick = function onClick() {
-             continueTo(nodesWays);
-           };
+           var enter = fields.enter().append('div').attr('class', function (d) {
+             return 'wrap-form-field wrap-form-field-' + d.safeid;
+           }); // Update
 
-           reveal('.surface', helpHtml('intro.navigation.points_lines_areas'), {
-             buttonText: _t.html('intro.ok'),
-             buttonCallback: onClick
+           fields = fields.merge(enter);
+           fields.order().each(function (d) {
+             select(this).call(d.render);
            });
-           context.map().on('drawn.intro', function () {
-             reveal('.surface', helpHtml('intro.navigation.points_lines_areas'), {
-               duration: 0,
-               buttonText: _t.html('intro.ok'),
-               buttonCallback: onClick
-             });
+           var titles = [];
+           var moreFields = notShown.map(function (field) {
+             var title = field.title();
+             titles.push(title);
+             var terms = field.terms();
+             if (field.key) terms.push(field.key);
+             if (field.keys) terms = terms.concat(field.keys);
+             return {
+               display: field.label(),
+               value: title,
+               title: title,
+               field: field,
+               terms: terms
+             };
            });
+           var placeholder = titles.slice(0, 3).join(', ') + (titles.length > 3 ? '…' : '');
+           var more = selection.selectAll('.more-fields').data(_state === 'hover' || moreFields.length === 0 ? [] : [0]);
+           more.exit().remove();
+           var moreEnter = more.enter().append('div').attr('class', 'more-fields').append('label');
+           moreEnter.append('span').html(_t.html('inspector.add_fields'));
+           more = moreEnter.merge(more);
+           var input = more.selectAll('.value').data([0]);
+           input.exit().remove();
+           input = input.enter().append('input').attr('class', 'value').attr('type', 'text').attr('placeholder', placeholder).call(utilNoAuto).merge(input);
+           input.call(utilGetSetValue, '').call(moreCombo.data(moreFields).on('accept', function (d) {
+             if (!d) return; // user entered something that was not matched
 
-           function continueTo(nextStep) {
-             context.map().on('drawn.intro', null);
-             nextStep();
+             var field = d.field;
+             field.show();
+             selection.call(formFields); // rerender
+
+             field.focus();
+           })); // avoid updating placeholder excessively (triggers style recalc)
+
+           if (_lastPlaceholder !== placeholder) {
+             input.attr('placeholder', placeholder);
+             _lastPlaceholder = placeholder;
            }
          }
 
-         function nodesWays() {
-           var onClick = function onClick() {
-             continueTo(clickTownHall);
-           };
+         formFields.fieldsArr = function (val) {
+           if (!arguments.length) return _fieldsArr;
+           _fieldsArr = val || [];
+           return formFields;
+         };
 
-           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
-             });
-           });
+         formFields.state = function (val) {
+           if (!arguments.length) return _state;
+           _state = val;
+           return formFields;
+         };
 
-           function continueTo(nextStep) {
-             context.map().on('drawn.intro', null);
-             nextStep();
-           }
-         }
+         formFields.klass = function (val) {
+           if (!arguments.length) return _klass;
+           _klass = val;
+           return formFields;
+         };
 
-         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
-               });
+         return formFields;
+       }
+
+       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);
+
+         var _state;
+
+         var _fieldsArr;
+
+         var _presets = [];
+
+         var _tags;
+
+         var _entityIDs;
+
+         function renderDisclosureContent(selection) {
+           if (!_fieldsArr) {
+             var graph = context.graph();
+             var geometries = Object.keys(_entityIDs.reduce(function (geoms, entityID) {
+               geoms[graph.entity(entityID).geometry(graph)] = true;
+               return geoms;
+             }, {}));
+             var presetsManager = _mainPresetIndex;
+             var allFields = [];
+             var allMoreFields = [];
+             var sharedTotalFields;
+
+             _presets.forEach(function (preset) {
+               var fields = preset.fields();
+               var moreFields = preset.moreFields();
+               allFields = utilArrayUnion(allFields, fields);
+               allMoreFields = utilArrayUnion(allMoreFields, moreFields);
+
+               if (!sharedTotalFields) {
+                 sharedTotalFields = utilArrayUnion(fields, moreFields);
+               } else {
+                 sharedTotalFields = sharedTotalFields.filter(function (field) {
+                   return fields.indexOf(field) !== -1 || moreFields.indexOf(field) !== -1;
+                 });
+               }
              });
-             context.on('enter.intro', function () {
-               if (isTownHallSelected()) continueTo(selectedTownHall);
+
+             var sharedFields = allFields.filter(function (field) {
+               return sharedTotalFields.indexOf(field) !== -1;
              });
-           }, 550); // after centerZoomEase
+             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.history().on('change.intro', function () {
-             if (!context.hasEntity(hallId)) {
-               continueTo(clickTownHall);
+             if (singularEntity && singularEntity.isHighwayIntersection(graph) && presetsManager.field('restrictions')) {
+               _fieldsArr.push(uiField(context, presetsManager.field('restrictions'), _entityIDs));
              }
-           });
-
-           function continueTo(nextStep) {
-             context.on('enter.intro', null);
-             context.map().on('move.intro drawn.intro', null);
-             context.history().on('change.intro', null);
-             nextStep();
-           }
-         }
-
-         function selectedTownHall() {
-           if (!isTownHallSelected()) return clickTownHall();
-           var entity = context.hasEntity(hallId);
-           if (!entity) return clickTownHall();
-           var box = pointBox(entity.loc, context);
 
-           var onClick = function onClick() {
-             continueTo(editorTownHall);
-           };
+             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
+                 }));
+               }
+             });
 
-           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
+             _fieldsArr.forEach(function (field) {
+               field.on('change', function (t, onInput) {
+                 dispatch.call('change', field, _entityIDs, t, onInput);
+               }).on('revert', function (keys) {
+                 dispatch.call('revert', field, keys);
+               });
              });
+           }
+
+           _fieldsArr.forEach(function (field) {
+             field.state(_state).tags(_tags);
            });
-           context.history().on('change.intro', function () {
-             if (!context.hasEntity(hallId)) {
-               continueTo(clickTownHall);
+
+           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));
              }
            });
+         }
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.history().on('change.intro', null);
-             nextStep();
+         section.presets = function (val) {
+           if (!arguments.length) return _presets;
+
+           if (!_presets || !val || !utilArrayIdentical(_presets, val)) {
+             _presets = val;
+             _fieldsArr = null;
            }
-         }
 
-         function editorTownHall() {
-           if (!isTownHallSelected()) return clickTownHall(); // disallow scrolling
+           return section;
+         };
 
-           context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+         section.state = function (val) {
+           if (!arguments.length) return _state;
+           _state = val;
+           return section;
+         };
 
-           var onClick = function onClick() {
-             continueTo(presetTownHall);
-           };
+         section.tags = function (val) {
+           if (!arguments.length) return _tags;
+           _tags = val; // Don't reset _fieldsArr here.
 
-           reveal('.entity-editor-pane', helpHtml('intro.navigation.editor_townhall'), {
-             buttonText: _t.html('intro.ok'),
-             buttonCallback: onClick
-           });
-           context.on('exit.intro', function () {
-             continueTo(clickTownHall);
-           });
-           context.history().on('change.intro', function () {
-             if (!context.hasEntity(hallId)) {
-               continueTo(clickTownHall);
-             }
-           });
+           return section;
+         };
 
-           function continueTo(nextStep) {
-             context.on('exit.intro', null);
-             context.history().on('change.intro', null);
-             context.container().select('.inspector-wrap').on('wheel.intro', null);
-             nextStep();
+         section.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
+
+           if (!val || !_entityIDs || !utilArrayIdentical(_entityIDs, val)) {
+             _entityIDs = val;
+             _fieldsArr = null;
            }
-         }
 
-         function presetTownHall() {
-           if (!isTownHallSelected()) return clickTownHall(); // reset pane, in case user happened to change it..
+           return section;
+         };
 
-           context.container().select('.inspector-wrap .panewrap').style('right', '0%'); // disallow scrolling
+         return utilRebind(section, dispatch, 'on');
+       }
 
-           context.container().select('.inspector-wrap').on('wheel.intro', eventCancel); // preset match, in case the user happened to change it.
+       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;
 
-           var entity = context.entity(context.selectedIDs()[0]);
-           var preset = _mainPresetIndex.match(entity, context.graph());
+         var _entityIDs;
 
-           var onClick = function onClick() {
-             continueTo(fieldsTownHall);
-           };
+         var _maxMembers = 1000;
 
-           reveal('.entity-editor-pane .section-feature-type', helpHtml('intro.navigation.preset_townhall', {
-             preset: preset.name()
-           }), {
-             buttonText: _t.html('intro.ok'),
-             buttonCallback: onClick
-           });
-           context.on('exit.intro', function () {
-             continueTo(clickTownHall);
-           });
-           context.history().on('change.intro', function () {
-             if (!context.hasEntity(hallId)) {
-               continueTo(clickTownHall);
-             }
+         function 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();
            });
+         }
 
-           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 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
+
+           utilHighlightEntities([d.id], true, context);
          }
 
-         function fieldsTownHall() {
-           if (!isTownHallSelected()) return clickTownHall(); // reset pane, in case user happened to change it..
+         function selectMember(d3_event, d) {
+           d3_event.preventDefault(); // remove the hover-highlight styling
 
-           context.container().select('.inspector-wrap .panewrap').style('right', '0%'); // disallow scrolling
+           utilHighlightEntities([d.id], false, context);
+           var entity = context.entity(d.id);
+           var mapExtent = context.map().extent();
 
-           context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+           if (!entity.intersects(mapExtent, context.graph())) {
+             // zoom to the entity if its extent is not visible now
+             context.map().zoomToEase(entity);
+           }
 
-           var onClick = function onClick() {
-             continueTo(closeTownHall);
-           };
+           context.enter(modeSelect(context, [d.id]));
+         }
 
-           reveal('.entity-editor-pane .section-preset-fields', helpHtml('intro.navigation.fields_townhall'), {
-             buttonText: _t.html('intro.ok'),
-             buttonCallback: onClick
-           });
-           context.on('exit.intro', function () {
-             continueTo(clickTownHall);
-           });
-           context.history().on('change.intro', function () {
-             if (!context.hasEntity(hallId)) {
-               continueTo(clickTownHall);
-             }
-           });
+         function changeRole(d3_event, d) {
+           var oldRole = d.role;
+           var newRole = context.cleanRelationRole(select(this).property('value'));
 
-           function continueTo(nextStep) {
-             context.on('exit.intro', null);
-             context.history().on('change.intro', null);
-             context.container().select('.inspector-wrap').on('wheel.intro', null);
-             nextStep();
+           if (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 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')
+         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.on('exit.intro', function () {
-             continueTo(searchStreet);
-           });
-           context.history().on('change.intro', function () {
-             // update the close icon in the tooltip if the user edits something.
-             var selector = '.entity-editor-pane button.close svg use';
-             var href = select(selector).attr('href') || '#iD-icon-close';
-             reveal('.entity-editor-pane', helpHtml('intro.navigation.close_townhall', {
-               button: icon(href, 'inline')
-             }), {
-               duration: 0
-             });
-           });
 
-           function continueTo(nextStep) {
-             context.on('exit.intro', null);
-             context.history().on('change.intro', null);
-             nextStep();
+           if (!context.hasEntity(d.relation.id)) {
+             // Removing the last member will also delete the relation.
+             // If this happens we need to exit the selection mode
+             context.enter(modeBrowse(context));
+           } else {
+             // Changing the mode also runs `validate`, but otherwise we need to
+             // rerun it manually
+             context.validator().validate();
            }
          }
 
-         function searchStreet() {
-           context.enter(modeBrowse(context));
-           context.history().reset('initial'); // ensure spring street exists
+         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);
 
-           var msec = transitionTime(springStreet, context.map().center());
+             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 (msec) {
-             reveal(null, null, {
-               duration: 0
-             });
-           }
+           if (taginfo) {
+             wrapEnter.each(bindTypeahead);
+           } // update
 
-           context.map().centerZoomEase(springStreet, 19, msec); // ..and user can see it
 
-           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);
-         }
+           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 checkSearchResult() {
-           var first = context.container().select('.feature-list-item:nth-child(0n+2)'); // skip "No Results" item
+               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 firstName = first.select('.entity-name');
-           var name = _t('intro.graph.name.spring-street');
+                 return 'translateY(-100%)';
+               } else if (index2 < index && d3_event.y < node.offsetTop + node.offsetHeight) {
+                 if (targetIndex === null || index2 < targetIndex) {
+                   targetIndex = index2;
+                 }
 
-           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);
+                 return 'translateY(100%)';
+               }
+
+               return null;
              });
-             context.container().select('.search-header input').on('keydown.intro', eventCancel, true).on('keyup.intro', 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);
 
-           function continueTo(nextStep) {
-             context.on('exit.intro', null);
-             context.container().select('.search-header input').on('keydown.intro', null).on('keyup.intro', null);
-             nextStep();
-           }
-         }
+             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 selectedStreet() {
-           if (!context.hasEntity(springStreetEndId) || !context.hasEntity(springStreetId)) {
-             return searchStreet();
-           }
+           function bindTypeahead(d) {
+             var row = select(this);
+             var role = row.selectAll('input.member-role');
+             var origValue = role.property('value');
 
-           var onClick = function onClick() {
-             continueTo(editorStreet);
-           };
+             function sort(value, data) {
+               var sameletter = [];
+               var other = [];
 
-           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.
+               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]);
+                 }
+               }
 
-           context.on('enter.intro', function (mode) {
-             if (!context.hasEntity(springStreetId)) {
-               return continueTo(searchStreet);
+               return sameletter.concat(other);
              }
 
-             var ids = context.selectedIDs();
+             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 (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)
-             }
-           });
+               if (d.member) {
+                 geometry = context.graph().geometry(d.member.id);
+               } else if (d.type === 'relation') {
+                 geometry = 'relation';
+               } else if (d.type === 'way') {
+                 geometry = 'line';
+               } else {
+                 geometry = 'point';
+               }
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.on('enter.intro', null);
-             context.history().on('change.intro', null);
-             nextStep();
+               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 unbind() {
+             var row = select(this);
+             row.selectAll('input.member-role').call(uiCombobox.off, context);
            }
          }
 
-         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
-             });
+         section.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
+           _entityIDs = val;
+           return section;
+         };
+
+         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;
            });
 
-           function continueTo(nextStep) {
-             context.on('exit.intro', null);
-             context.history().on('change.intro', null);
-             nextStep();
+           for (var i in memberIndexes) {
+             graph = actionDeleteMember(relationId, memberIndexes[i])(graph);
            }
-         }
 
-         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');
-             }
+           return graph;
+         };
+       }
+
+       function uiSectionRawMembershipEditor(context) {
+         var section = uiSection('raw-membership-editor', context).shouldDisplay(function () {
+           return _entityIDs && _entityIDs.length;
+         }).label(function () {
+           var parents = getSharedParentRelations();
+           var gt = parents.length > _maxMemberships ? '>' : '';
+           var count = gt + parents.slice(0, _maxMemberships).length;
+           return _t('inspector.title_count', {
+             title: _t.html('inspector.relations'),
+             count: count
            });
-         }
+         }).disclosureContent(renderDisclosureContent);
+         var taginfo = services.taginfo;
+         var nearbyCombo = uiCombobox(context, 'parent-relation').minItems(1).fetcher(fetchNearbyRelations).itemsMouseEnter(function (d3_event, d) {
+           if (d.relation) utilHighlightEntities([d.relation.id], true, context);
+         }).itemsMouseLeave(function (d3_event, d) {
+           if (d.relation) utilHighlightEntities([d.relation.id], false, context);
+         });
+         var _inChange = false;
+         var _entityIDs = [];
 
-         chapter.enter = function () {
-           dragMap();
-         };
+         var _showBlank;
 
-         chapter.exit = function () {
-           timeouts.forEach(window.clearTimeout);
-           context.on('enter.intro exit.intro', null);
-           context.map().on('move.intro drawn.intro', null);
-           context.history().on('change.intro', null);
-           context.container().select('.inspector-wrap').on('wheel.intro', null);
-           context.container().select('.search-header input').on('keydown.intro keyup.intro', null);
-         };
+         var _maxMemberships = 1000;
 
-         chapter.restart = function () {
-           chapter.exit();
-           chapter.enter();
-         };
+         function getSharedParentRelations() {
+           var parents = [];
 
-         return utilRebind(chapter, dispatch$1, 'on');
-       }
+           for (var i = 0; i < _entityIDs.length; i++) {
+             var entity = context.graph().hasEntity(_entityIDs[i]);
+             if (!entity) continue;
 
-       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'
-         };
+             if (i === 0) {
+               parents = context.graph().parentRelations(entity);
+             } else {
+               parents = utilArrayIntersection(parents, context.graph().parentRelations(entity));
+             }
 
-         function timeout(f, t) {
-           timeouts.push(window.setTimeout(f, t));
-         }
+             if (!parents.length) break;
+           }
 
-         function eventCancel(d3_event) {
-           d3_event.stopPropagation();
-           d3_event.preventDefault();
+           return parents;
          }
 
-         function addPoint() {
-           context.enter(modeBrowse(context));
-           context.history().reset('initial');
-           var msec = transitionTime(intersection, context.map().center());
+         function getMemberships() {
+           var memberships = [];
+           var relations = getSharedParentRelations().slice(0, _maxMemberships);
+           var isMultiselect = _entityIDs.length > 1;
+           var i, relation, membership, index, member, indexedMember;
 
-           if (msec) {
-             reveal(null, null, {
-               duration: 0
-             });
-           }
+           for (i = 0; i < relations.length; i++) {
+             relation = relations[i];
+             membership = {
+               relation: relation,
+               members: [],
+               hash: osmEntity.key(relation)
+             };
 
-           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);
+             for (index = 0; index < relation.members.length; index++) {
+               member = relation.members[index];
 
-           function continueTo(nextStep) {
-             context.on('enter.intro', null);
-             nextStep();
-           }
-         }
+               if (_entityIDs.indexOf(member.id) !== -1) {
+                 indexedMember = Object.assign({}, member, {
+                   index: index
+                 });
+                 membership.members.push(indexedMember);
+                 membership.hash += ',' + index.toString();
 
-         function placePoint() {
-           if (context.mode().id !== 'add-point') {
-             return chapter.restart();
+                 if (!isMultiselect) {
+                   // For single selections, list one entry per membership per relation.
+                   // For multiselections, list one entry per relation.
+                   memberships.push(membership);
+                   membership = {
+                     relation: relation,
+                     members: [],
+                     hash: osmEntity.key(relation)
+                   };
+                 }
+               }
+             }
+
+             if (membership.members.length) memberships.push(membership);
            }
 
-           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
+           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;
            });
-           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();
-           }
+           return memberships;
          }
 
-         function searchPreset() {
-           if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
-             return addPoint();
-           } // disallow scrolling
+         function selectRelation(d3_event, d) {
+           d3_event.preventDefault(); // remove the hover-highlight styling
 
+           utilHighlightEntities([d.relation.id], false, context);
+           context.enter(modeSelect(context, [d.relation.id]));
+         }
 
-           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);
-             }
+         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
 
-             var ids = context.selectedIDs();
+           utilHighlightEntities([d.relation.id], true, context);
+         }
 
-             if (mode.id !== 'select' || !ids.length || ids[0] !== _pointID) {
-               // keep the user's point selected..
-               context.enter(modeSelect(context, [_pointID])); // disallow scrolling
+         function changeRole(d3_event, d) {
+           if (d === 0) return; // called on newrow (shouldn't happen)
 
-               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);
-             }
-           });
+           if (_inChange) return; // avoid accidental recursive call #5731
 
-           function checkPresetSearch() {
-             var first = context.container().select('.preset-list-item:first-child');
+           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;
+           });
 
-             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 (membersToUpdate.length) {
+             _inChange = true;
+             context.perform(function actionChangeMemberRoles(graph) {
+               membersToUpdate.forEach(function (member) {
+                 var newMember = Object.assign({}, member, {
+                   role: newRole
+                 });
+                 delete newMember.index;
+                 graph = actionChangeMember(d.relation.id, newMember, member.index)(graph);
                });
-             }
+               return graph;
+             }, _t('operations.change_role.annotation', {
+               n: membersToUpdate.length
+             }));
+             context.validator().validate();
            }
 
-           function 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();
-           }
+           _inChange = false;
          }
 
-         function aboutFeatureEditor() {
-           if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
-             return addPoint();
-           }
+         function addMembership(d, role) {
+           this.blur(); // avoid keeping focus on the button
 
-           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);
+           _showBlank = false;
+
+           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);
                }
-             });
-           }, 400);
-           context.on('exit.intro', function () {
-             // if user leaves select mode here, just continue with the tutorial.
-             continueTo(reselectPoint);
-           });
 
-           function continueTo(nextStep) {
-             context.on('exit.intro', null);
-             nextStep();
+               return graph;
+             };
+           }
+
+           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));
            }
          }
 
-         function addName() {
-           if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
-             return addPoint();
-           } // reset pane, in case user happened to change it..
+         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
 
-           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);
+           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 (entity.tags.name) {
-               var tooltip = reveal('.entity-editor-pane', addNameString, {
-                 tooltipClass: 'intro-points-describe',
-                 buttonText: _t.html('intro.ok'),
-                 buttonCallback: function buttonCallback() {
-                   continueTo(addCloseEditor);
-                 }
+         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;
+           }
+
+           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
                });
-               tooltip.select('.instruction').style('display', 'none');
-             } else {
-               reveal('.entity-editor-pane', addNameString, {
-                 tooltipClass: 'intro-points-describe'
+             });
+             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;
                });
-             }
-           }, 400);
-           context.history().on('change.intro', function () {
-             continueTo(addCloseEditor);
+             });
+           }
+
+           result.forEach(function (obj) {
+             obj.title = obj.value;
            });
-           context.on('exit.intro', function () {
-             // if user leaves select mode here, just continue with the tutorial.
-             continueTo(reselectPoint);
+           result.unshift(newRelation);
+           callback(result);
+         }
+
+         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.on('exit.intro', null);
-             context.history().on('change.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 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);
+           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);
            });
-           reveal('.entity-editor-pane', helpHtml('intro.points.add_close', {
-             button: icon(href, 'inline')
-           }));
+           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);
 
-           function continueTo(nextStep) {
-             context.on('exit.intro', null);
-             nextStep();
+           if (taginfo) {
+             wrapEnter.each(bindTypeahead);
            }
-         }
 
-         function reselectPoint() {
-           if (!_pointID) return chapter.restart();
-           var entity = context.hasEntity(_pointID);
-           if (!entity) return chapter.restart(); // make sure it's still a cafe, in case user somehow changed it..
+           var newMembership = list.selectAll('.member-row-new').data(_showBlank ? [0] : []); // Exit
 
-           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());
+           newMembership.exit().remove(); // Enter
 
-           if (msec) {
-             reveal(null, null, {
-               duration: 0
-             });
-           }
+           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
 
-           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..
+           newMembership = newMembership.merge(newMembershipEnter);
+           newMembership.selectAll('.member-entity-input').on('blur', cancelEntity) // if it wasn't accepted normally, cancel it
+           .call(nearbyCombo.on('accept', acceptEntity).on('cancel', cancelEntity)); // Container for the Add button
+
+           var addRow = selection.selectAll('.add-row').data([0]); // enter
+
+           var addRowEnter = addRow.enter().append('div').attr('class', 'add-row');
+           var addRelationButton = addRowEnter.append('button').attr('class', 'add-relation');
+           addRelationButton.call(svgIcon('#iD-icon-plus', 'light'));
+           addRelationButton.call(uiTooltip().title(_t.html('inspector.add_to_relation')).placement(_mainLocalizer.textDirection() === 'ltr' ? 'right' : 'left'));
+           addRowEnter.append('div').attr('class', 'space-value'); // preserve space
+
+           addRowEnter.append('div').attr('class', 'space-buttons'); // preserve space
+           // update
+
+           addRow = addRow.merge(addRowEnter);
+           addRow.select('.add-relation').on('click', function () {
+             _showBlank = true;
+             section.reRender();
+             list.selectAll('.member-entity-input').node().focus();
+           });
 
-             context.on('enter.intro', function (mode) {
-               if (mode.id !== 'select') return;
-               continueTo(updatePoint);
-             });
-           }, msec + 100);
+           function acceptEntity(d) {
+             if (!d) {
+               cancelEntity();
+               return;
+             } // remove hover-higlighting
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.on('enter.intro', null);
-             nextStep();
+
+             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);
            }
-         }
 
-         function updatePoint() {
-           if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
-             return continueTo(reselectPoint);
-           } // reset pane, in case user happened to untag the point..
+           function cancelEntity() {
+             var input = newMembership.selectAll('.member-entity-input');
+             input.property('value', ''); // remove hover-higlighting
 
+             context.surface().selectAll('.highlighted').classed('highlighted', false);
+           }
 
-           context.container().select('.inspector-wrap .panewrap').style('right', '0%');
-           context.on('exit.intro', function () {
-             continueTo(reselectPoint);
-           });
-           context.history().on('change.intro', function () {
-             continueTo(updateCloseEditor);
-           });
-           timeout(function () {
-             reveal('.entity-editor-pane', helpHtml('intro.points.update'), {
-               tooltipClass: 'intro-points-describe'
-             });
-           }, 400);
+           function bindTypeahead(d) {
+             var row = select(this);
+             var role = row.selectAll('input.member-role');
+             var origValue = role.property('value');
 
-           function continueTo(nextStep) {
-             context.on('exit.intro', null);
-             context.history().on('change.intro', null);
-             nextStep();
-           }
-         }
+             function sort(value, data) {
+               var sameletter = [];
+               var other = [];
 
-         function updateCloseEditor() {
-           if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
-             return continueTo(reselectPoint);
-           } // reset pane, in case user happened to change it..
+               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);
+             }
 
-           context.container().select('.inspector-wrap .panewrap').style('right', '0%');
-           context.on('exit.intro', function () {
-             continueTo(rightClickPoint);
-           });
-           timeout(function () {
-             reveal('.entity-editor-pane', helpHtml('intro.points.update_close', {
-               button: icon('#iD-icon-close', 'inline')
+             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);
              }));
-           }, 500);
+           }
 
-           function continueTo(nextStep) {
-             context.on('exit.intro', null);
-             nextStep();
+           function unbind() {
+             var row = select(this);
+             row.selectAll('input.member-role').call(uiCombobox.off, context);
            }
          }
 
-         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
+         section.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
+           _entityIDs = val;
+           _showBlank = false;
+           return section;
+         };
 
-           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
-           });
+         return section;
+       }
 
-           function continueTo(nextStep) {
-             context.on('enter.intro', null);
-             context.map().on('move.intro', null);
-             nextStep();
+       function uiSectionSelectionList(context) {
+         var _selectedIDs = [];
+         var section = uiSection('selected-features', context).shouldDisplay(function () {
+           return _selectedIDs.length > 1;
+         }).label(function () {
+           return _t('inspector.title_count', {
+             title: _t.html('inspector.features'),
+             count: _selectedIDs.length
+           });
+         }).disclosureContent(renderDisclosureContent);
+         context.history().on('change.selectionList', function (difference) {
+           if (difference) {
+             section.reRender();
            }
+         });
+
+         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 enterDelete() {
-           if (!_pointID) return chapter.restart();
-           var entity = context.hasEntity(_pointID);
-           if (!entity) return chapter.restart();
-           var node = selectMenuItem(context, 'delete').node();
+         function deselectEntity(d3_event, entity) {
+           var selectedIDs = _selectedIDs.slice();
 
-           if (!node) {
-             return continueTo(rightClickPoint);
+           var index = selectedIDs.indexOf(entity.id);
+
+           if (index > -1) {
+             selectedIDs.splice(index, 1);
+             context.enter(modeSelect(context, selectedIDs));
            }
+         }
 
-           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
-               });
+         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);
+
+           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);
              });
-           }, 300); // after menu visible
+           });
+           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
 
-           context.on('exit.intro', function () {
-             if (!_pointID) return chapter.restart();
-             var entity = context.hasEntity(_pointID);
-             if (entity) return continueTo(rightClickPoint); // point still exists
+           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.history().on('change.intro', function (changed) {
-             if (changed.deleted().length) {
-               continueTo(undo);
-             }
+           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 continueTo(nextStep) {
-             context.map().on('move.intro', null);
-             context.history().on('change.intro', null);
-             context.on('exit.intro', null);
-             nextStep();
-           }
          }
 
-         function undo() {
-           context.history().on('change.intro', function () {
-             continueTo(play);
-           });
-           reveal('.top-toolbar button.undo-button', helpHtml('intro.points.undo'));
+         return section;
+       }
 
-           function continueTo(nextStep) {
-             context.history().on('change.intro', null);
-             nextStep();
-           }
-         }
+       function uiEntityEditor(context) {
+         var dispatch = dispatch$8('choose');
+         var _state = 'select';
+         var _coalesceChanges = false;
+         var _modified = false;
 
-         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');
-             }
-           });
-         }
+         var _base;
 
-         chapter.enter = function () {
-           addPoint();
-         };
+         var _entityIDs;
 
-         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);
-         };
+         var _activePresets = [];
 
-         chapter.restart = function () {
-           chapter.exit();
-           chapter.enter();
-         };
+         var _newFeature;
 
-         return utilRebind(chapter, dispatch$1, 'on');
-       }
+         var _sections;
 
-       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 = [];
+         function entityEditor(selection) {
+           var combinedTags = utilCombinedTags(_entityIDs, context.graph()); // Header
 
-         var _areaID;
+           var header = selection.selectAll('.header').data([0]); // Enter
 
-         var chapter = {
-           title: 'intro.areas.title'
-         };
+           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
 
-         function timeout(f, t) {
-           timeouts.push(window.setTimeout(f, t));
-         }
+           header = header.merge(headerEnter);
+           header.selectAll('h3').html(_entityIDs.length === 1 ? _t.html('inspector.edit') : _t.html('inspector.edit_features'));
+           header.selectAll('.preset-reset').on('click', function () {
+             dispatch.call('choose', this, _activePresets);
+           }); // Body
 
-         function eventCancel(d3_event) {
-           d3_event.stopPropagation();
-           d3_event.preventDefault();
-         }
+           var body = selection.selectAll('.inspector-body').data([0]); // Enter
 
-         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);
-         }
+           var bodyEnter = body.enter().append('div').attr('class', 'entity-editor inspector-body sep-top'); // Update
 
-         function addArea() {
-           context.enter(modeBrowse(context));
-           context.history().reset('initial');
-           _areaID = null;
-           var msec = transitionTime(playground, context.map().center());
+           body = body.merge(bodyEnter);
 
-           if (msec) {
-             reveal(null, null, {
-               duration: 0
-             });
+           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)];
            }
 
-           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);
+           _sections.forEach(function (section) {
+             if (section.entityIDs) {
+               section.entityIDs(_entityIDs);
+             }
 
-           function continueTo(nextStep) {
-             context.on('enter.intro', null);
-             nextStep();
-           }
-         }
+             if (section.presets) {
+               section.presets(_activePresets);
+             }
 
-         function startPlayground() {
-           if (context.mode().id !== 'add-area') {
-             return chapter.restart();
-           }
+             if (section.tags) {
+               section.tags(combinedTags);
+             }
 
-           _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
+             if (section.state) {
+               section.state(_state);
+             }
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.on('enter.intro', null);
-             nextStep();
-           }
-         }
+             body.call(section.render);
+           });
 
-         function continuePlayground() {
-           if (context.mode().id !== 'draw-area') {
-             return chapter.restart();
+           context.history().on('change.entity-editor', historyChanged);
+
+           function historyChanged(difference) {
+             if (selection.selectAll('.entity-editor').empty()) return;
+             if (_state === 'hide') return;
+             var significant = !difference || difference.didChange.properties || difference.didChange.addition || difference.didChange.deletion;
+             if (!significant) return;
+             _entityIDs = _entityIDs.filter(context.hasEntity);
+             if (!_entityIDs.length) return;
+             var priorActivePreset = _activePresets.length === 1 && _activePresets[0];
+             loadActivePresets();
+             var graph = context.graph();
+             entityEditor.modified(_base !== graph);
+             entityEditor(selection);
+
+             if (priorActivePreset && _activePresets.length === 1 && priorActivePreset !== _activePresets[0]) {
+               // flash the button to indicate the preset changed
+               context.container().selectAll('.entity-editor button.preset-reset .label').style('background-color', '#fff').transition().duration(750).style('background-color', null);
+             }
            }
+         } // Tag changes that fire on input can all get coalesced into a single
+         // history operation when the user leaves the field.  #2342
+         // Use explicit entityIDs in case the selection changes before the event is fired.
 
-           _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 changeTags(entityIDs, changed, onInput) {
+           var actions = [];
 
-               if (entity && entity.nodes.length >= 6) {
-                 return continueTo(finishPlayground);
-               } else {
-                 return;
+           for (var i in entityIDs) {
+             var entityID = entityIDs[i];
+             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];
+
+               if (v !== undefined || tags.hasOwnProperty(k)) {
+                 tags[k] = v;
                }
-             } else if (mode.id === 'select') {
-               _areaID = context.selectedIDs()[0];
-               return continueTo(searchPresets);
-             } else {
-               return chapter.restart();
              }
-           });
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.on('enter.intro', null);
-             nextStep();
-           }
-         }
+             if (!onInput) {
+               tags = utilCleanTags(tags);
+             }
 
-         function finishPlayground() {
-           if (context.mode().id !== 'draw-area') {
-             return chapter.restart();
+             if (!fastDeepEqual(entity.tags, tags)) {
+               actions.push(actionChangeTags(entityID, tags));
+             }
            }
 
-           _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
+           if (actions.length) {
+             var combinedAction = function combinedAction(graph) {
+               actions.forEach(function (action) {
+                 graph = action(graph);
                });
-             });
-           }, 250); // after reveal
-
-           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 graph;
+             };
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.on('enter.intro', null);
-             nextStep();
-           }
-         }
+             var annotation = _t('operations.change_tags.annotation');
 
-         function searchPresets() {
-           if (!_areaID || !context.hasEntity(_areaID)) {
-             return addArea();
-           }
+             if (_coalesceChanges) {
+               context.overwrite(combinedAction, annotation);
+             } else {
+               context.perform(combinedAction, annotation);
+               _coalesceChanges = !!onInput;
+             }
+           } // if leaving field (blur event), rerun validation
 
-           var ids = context.selectedIDs();
 
-           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
-             context.enter(modeSelect(context, [_areaID]));
-           } // disallow scrolling
+           if (!onInput) {
+             context.validator().validate();
+           }
+         }
 
+         function revertTags(keys) {
+           var actions = [];
 
-           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..
+           for (var i in _entityIDs) {
+             var entityID = _entityIDs[i];
+             var original = context.graph().base().entities[entityID];
+             var changed = {};
 
-           context.on('enter.intro', function (mode) {
-             if (!_areaID || !context.hasEntity(_areaID)) {
-               return continueTo(addArea);
+             for (var j in keys) {
+               var key = keys[j];
+               changed[key] = original ? original.tags[key] : undefined;
              }
 
-             var ids = context.selectedIDs();
-
-             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 entity = context.entity(entityID);
+             var tags = Object.assign({}, entity.tags); // shallow copy
 
-               context.container().select('.inspector-wrap .panewrap').style('right', '-100%'); // disallow scrolling
+             for (var k in changed) {
+               if (!k) continue;
+               var v = changed[k];
 
-               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);
+               if (v !== undefined || tags.hasOwnProperty(k)) {
+                 tags[k] = v;
+               }
              }
-           });
 
-           function checkPresetSearch() {
-             var first = context.container().select('.preset-list-item:first-child');
+             tags = utilCleanTags(tags);
 
-             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);
-               });
+             if (!fastDeepEqual(entity.tags, tags)) {
+               actions.push(actionChangeTags(entityID, tags));
              }
            }
 
-           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 (actions.length) {
+             var combinedAction = function combinedAction(graph) {
+               actions.forEach(function (action) {
+                 graph = action(graph);
+               });
+               return graph;
+             };
 
-           var ids = context.selectedIDs();
+             var annotation = _t('operations.change_tags.annotation');
 
-           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
-             return searchPresets();
+             if (_coalesceChanges) {
+               context.overwrite(combinedAction, annotation);
+             } else {
+               context.perform(combinedAction, annotation);
+               _coalesceChanges = false;
+             }
            }
 
-           if (!context.container().select('.form-field-description').empty()) {
-             return continueTo(describePlayground);
-           } // disallow scrolling
+           context.validator().validate();
+         }
 
+         entityEditor.modified = function (val) {
+           if (!arguments.length) return _modified;
+           _modified = val;
+           return entityEditor;
+         };
 
-           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.
+         entityEditor.state = function (val) {
+           if (!arguments.length) return _state;
+           _state = val;
+           return entityEditor;
+         };
 
-             var entity = context.entity(_areaID);
+         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
 
-             if (entity.tags.description) {
-               return continueTo(play);
-             } // scroll "Add field" into view
+           _base = context.graph();
+           _coalesceChanges = false;
+           if (val && _entityIDs && utilArrayIdentical(_entityIDs, val)) return entityEditor; // exit early if no change
 
+           _entityIDs = val;
+           loadActivePresets(true);
+           return entityEditor.modified(false);
+         };
 
-             var box = context.container().select('.more-fields').node().getBoundingClientRect();
+         entityEditor.newFeature = function (val) {
+           if (!arguments.length) return _newFeature;
+           _newFeature = val;
+           return entityEditor;
+         };
 
-             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 loadActivePresets(isForNewSelection) {
+           var graph = context.graph();
+           var counts = {};
 
-             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
+           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;
+           }
 
-           context.on('exit.intro', function () {
-             return continueTo(searchPresets);
+           var matches = Object.keys(counts).sort(function (p1, p2) {
+             return counts[p2] - counts[p1];
+           }).map(function (pID) {
+             return _mainPresetIndex.item(pID);
            });
 
-           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 (!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 chooseDescriptionField() {
-           if (!_areaID || !context.hasEntity(_areaID)) {
-             return addArea();
+         entityEditor.presets = function (val) {
+           if (!arguments.length) return _activePresets; // don't reload the same preset
+
+           if (!utilArrayIdentical(val, _activePresets)) {
+             _activePresets = val;
            }
 
-           var ids = context.selectedIDs();
+           return entityEditor;
+         };
 
-           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
-             return searchPresets();
-           }
+         return utilRebind(entityEditor, dispatch, 'on');
+       }
 
-           if (!context.container().select('.form-field-description').empty()) {
-             return continueTo(describePlayground);
-           } // Make sure combobox is ready..
+       function uiPresetList(context) {
+         var dispatch = dispatch$8('cancel', 'choose');
 
+         var _entityIDs;
 
-           if (context.container().select('div.combobox').empty()) {
-             return continueTo(clickAddField);
-           } // Watch for the combobox to go away..
+         var _currLoc;
 
+         var _currentPresets;
 
-           var watcher;
-           watcher = window.setInterval(function () {
-             if (context.container().select('div.combobox').empty()) {
-               window.clearInterval(watcher);
-               timeout(function () {
-                 if (context.container().select('.form-field-description').empty()) {
-                   continueTo(retryChooseDescription);
-                 } else {
-                   continueTo(describePlayground);
-                 }
-               }, 300); // after description field added.
-             }
-           }, 300);
-           reveal('div.combobox', helpHtml('intro.areas.choose_field', {
-             field: descriptionField.label()
-           }), {
-             duration: 300
-           });
-           context.on('exit.intro', function () {
-             return continueTo(searchPresets);
-           });
+         var _autofocus = false;
 
-           function continueTo(nextStep) {
-             if (watcher) window.clearInterval(watcher);
-             context.on('exit.intro', null);
-             nextStep();
+         function presetList(selection) {
+           if (!_entityIDs) return;
+           var presets = _mainPresetIndex.matchAllGeometry(entityGeometries());
+           selection.html('');
+           var messagewrap = selection.append('div').attr('class', 'header fillL');
+           var message = messagewrap.append('h3').html(_t.html('inspector.choose'));
+           messagewrap.append('button').attr('class', 'preset-choose').on('click', function () {
+             dispatch.call('cancel', this);
+           }).call(svgIcon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward'));
+
+           function initialKeydown(d3_event) {
+             // hack to let delete shortcut work when search is autofocused
+             if (search.property('value').length === 0 && (d3_event.keyCode === utilKeybinding.keyCodes['⌫'] || d3_event.keyCode === utilKeybinding.keyCodes['⌦'])) {
+               d3_event.preventDefault();
+               d3_event.stopPropagation();
+               operationDelete(context, _entityIDs)(); // hack to let undo work when search is autofocused
+             } else if (search.property('value').length === 0 && (d3_event.ctrlKey || d3_event.metaKey) && d3_event.keyCode === utilKeybinding.keyCodes.z) {
+               d3_event.preventDefault();
+               d3_event.stopPropagation();
+               context.undo();
+             } else if (!d3_event.ctrlKey && !d3_event.metaKey) {
+               // don't check for delete/undo hack on future keydown events
+               select(this).on('keydown', keydown);
+               keydown.call(this, d3_event);
+             }
            }
-         }
 
-         function describePlayground() {
-           if (!_areaID || !context.hasEntity(_areaID)) {
-             return addArea();
+           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 buttons = list.selectAll('.preset-list-button');
+               if (!buttons.empty()) buttons.nodes()[0].focus();
+             }
            }
 
-           var ids = context.selectedIDs();
+           function keypress(d3_event) {
+             // enter
+             var value = search.property('value');
 
-           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
-             return searchPresets();
-           } // reset pane, in case user happened to change it..
+             if (d3_event.keyCode === 13 && // ↩ Return
+             value.length) {
+               list.selectAll('.preset-list-item:first-child').each(function (d) {
+                 d.choose.call(this);
+               });
+             }
+           }
 
+           function inputevent() {
+             var value = search.property('value');
+             list.classed('filtered', value.length);
+             var results, messageText;
 
-           context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+             if (value.length) {
+               results = presets.search(value, entityGeometries()[0], _currLoc);
+               messageText = _t('inspector.results', {
+                 n: results.collection.length,
+                 search: value
+               });
+             } else {
+               results = _mainPresetIndex.defaults(entityGeometries()[0], 36, !context.inIntro(), _currLoc);
+               messageText = _t('inspector.choose');
+             }
 
-           if (context.container().select('.form-field-description').empty()) {
-             return continueTo(retryChooseDescription);
+             list.call(drawList, results);
+             message.html(messageText);
            }
 
-           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 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 continueTo(nextStep) {
-             context.on('exit.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 retryChooseDescription() {
-           if (!_areaID || !context.hasEntity(_areaID)) {
-             return addArea();
-           }
+         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] !== _areaID) {
-             return searchPresets();
-           } // reset pane, in case user happened to change it..
+             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 .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);
+           if (d3_event.keyCode === utilKeybinding.keyCodes['↓']) {
+             d3_event.preventDefault();
+             d3_event.stopPropagation(); // the next item in the list at the same level
+
+             var nextItem = select(item.node().nextElementSibling); // if there is no next item in this list
+
+             if (nextItem.empty()) {
+               // if there is a parent item
+               if (!parentItem.empty()) {
+                 // the item is the last item of a sublist,
+                 // select the next item at the parent level
+                 nextItem = select(parentItem.node().nextElementSibling);
+               } // if the focused item is expanded
+
+             } else if (select(this).classed('expanded')) {
+               // select the first subitem instead
+               nextItem = item.select('.subgrid .preset-list-item:first-child');
              }
-           });
-           context.on('exit.intro', function () {
-             return continueTo(searchPresets);
-           });
 
-           function continueTo(nextStep) {
-             context.on('exit.intro', null);
-             nextStep();
-           }
-         }
+             if (!nextItem.empty()) {
+               // focus on the next item
+               nextItem.select('.preset-list-button').node().focus();
+             } // arrow up, move focus to the previous, higher item
 
-         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');
+           } else if (d3_event.keyCode === utilKeybinding.keyCodes['↑']) {
+             d3_event.preventDefault();
+             d3_event.stopPropagation(); // the previous item in the list at the same level
+
+             var previousItem = select(item.node().previousElementSibling); // if there is no previous item in this list
+
+             if (previousItem.empty()) {
+               // if there is a parent item
+               if (!parentItem.empty()) {
+                 // the item is the first subitem of a sublist select the parent item
+                 previousItem = parentItem;
+               } // if the previous item is expanded
+
+             } else if (previousItem.select('.preset-list-button').classed('expanded')) {
+               // select the last subitem of the sublist of the previous item
+               previousItem = previousItem.select('.subgrid .preset-list-item:last-child');
              }
-           });
-         }
 
-         chapter.enter = function () {
-           addArea();
-         };
+             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
 
-         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);
-         };
+           } 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
 
-         chapter.restart = function () {
-           chapter.exit();
-           chapter.enter();
-         };
+             if (!parentItem.empty()) {
+               parentItem.select('.preset-list-button').node().focus();
+             } // arrow right, choose this item
 
-         return utilRebind(chapter, dispatch$1, 'on');
-       }
+           } else if (d3_event.keyCode === utilKeybinding.keyCodes[_mainLocalizer.textDirection() === 'rtl' ? '←' : '→']) {
+             d3_event.preventDefault();
+             d3_event.stopPropagation();
+             item.datum().choose.call(select(this).node());
+           }
+         }
 
-       function uiIntroLine(context, reveal) {
-         var dispatch$1 = dispatch('done');
-         var timeouts = [];
-         var _tulipRoadID = null;
-         var flowerRoadID = 'w646';
-         var tulipRoadStart = [-85.6297754121684, 41.95805253325314];
-         var tulipRoadMidpoint = [-85.62975395449628, 41.95787501510204];
-         var tulipRoadIntersection = [-85.62974496187628, 41.95742515554585];
-         var roadCategory = _mainPresetIndex.item('category-road_minor');
-         var residentialPreset = _mainPresetIndex.item('highway/residential');
-         var woodRoadID = 'w525';
-         var woodRoadEndID = 'n2862';
-         var woodRoadAddNode = [-85.62390110349587, 41.95397111462291];
-         var woodRoadDragEndpoint = [-85.623867390213, 41.95466987786487];
-         var woodRoadDragMidpoint = [-85.62386254803509, 41.95430395953872];
-         var washingtonStreetID = 'w522';
-         var twelfthAvenueID = 'w1';
-         var eleventhAvenueEndID = 'n3550';
-         var twelfthAvenueEndID = 'n5';
-         var _washingtonSegmentID = null;
-         var eleventhAvenueEnd = context.entity(eleventhAvenueEndID).loc;
-         var twelfthAvenueEnd = context.entity(twelfthAvenueEndID).loc;
-         var deleteLinesLoc = [-85.6219395542764, 41.95228033922477];
-         var twelfthAvenue = [-85.62219310052491, 41.952505413152956];
-         var chapter = {
-           title: 'intro.lines.title'
-         };
+         function CategoryItem(preset) {
+           var box,
+               sublist,
+               shown = false;
+
+           function item(selection) {
+             var wrap = selection.append('div').attr('class', 'preset-list-button-wrap category');
 
-         function timeout(f, t) {
-           timeouts.push(window.setTimeout(f, t));
-         }
+             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();
+             }
 
-         function eventCancel(d3_event) {
-           d3_event.stopPropagation();
-           d3_event.preventDefault();
-         }
+             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
 
-         function addLine() {
-           context.enter(modeBrowse(context));
-           context.history().reset('initial');
-           var msec = transitionTime(tulipRoadStart, context.map().center());
+                 if (!select(this).classed('expanded')) {
+                   // toggle expansion (expand the item)
+                   click.call(this, d3_event);
+                 } // left arrow, collapse the focused item
 
-           if (msec) {
-             reveal(null, null, {
-               duration: 0
+               } else if (d3_event.keyCode === utilKeybinding.keyCodes[_mainLocalizer.textDirection() === 'rtl' ? '→' : '←']) {
+                 d3_event.preventDefault();
+                 d3_event.stopPropagation(); // if the item is expanded
+
+                 if (select(this).classed('expanded')) {
+                   // toggle expansion (collapse the item)
+                   click.call(this, d3_event);
+                 }
+               } else {
+                 itemKeydown.call(this, d3_event);
+               }
+             });
+             var label = button.append('div').attr('class', 'label').append('div').attr('class', 'label-inner');
+             label.append('div').attr('class', 'namepart').call(svgIcon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward', 'inline')).append('span').html(function () {
+               return preset.nameLabel() + '&hellip;';
              });
+             box = selection.append('div').attr('class', 'subgrid').style('max-height', '0px').style('opacity', 0);
+             box.append('div').attr('class', 'arrow');
+             sublist = box.append('div').attr('class', 'preset-list fillL3');
            }
 
-           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);
+           item.choose = function () {
+             if (!box || !sublist) return;
 
-           function continueTo(nextStep) {
-             context.on('enter.intro', null);
-             nextStep();
-           }
+             if (shown) {
+               shown = false;
+               box.transition().duration(200).style('opacity', '0').style('max-height', '0px').style('padding-bottom', '0px');
+             } else {
+               shown = true;
+               var members = preset.members.matchAllGeometry(entityGeometries());
+               sublist.call(drawList, members);
+               box.transition().duration(200).style('opacity', '1').style('max-height', 200 + members.collection.length * 190 + 'px').style('padding-bottom', '10px');
+             }
+           };
+
+           item.preset = preset;
+           return item;
          }
 
-         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
+         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;
              });
-           });
-           context.on('enter.intro', function (mode) {
-             if (mode.id !== 'draw-line') return chapter.restart();
-             continueTo(drawLine);
-           });
-
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.on('enter.intro', null);
-             nextStep();
+             wrap.call(item.reference.button);
+             selection.call(item.reference.body);
            }
-         }
 
-         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..
+           item.choose = function () {
+             if (select(this).classed('disabled')) return;
 
-           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();
+             if (!context.inIntro()) {
+               _mainPresetIndex.setMostRecent(preset, entityGeometries()[0]);
              }
-           });
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.history().on('change.intro', null);
-             context.on('enter.intro', null);
-             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 isLineConnected() {
-           var entity = _tulipRoadID && context.hasEntity(_tulipRoadID);
+               return graph;
+             }, _t('operations.change_tags.annotation'));
+             context.validator().validate(); // rerun validation
 
-           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;
-             });
-           });
-         }
+             dispatch.call('choose', this, preset);
+           };
 
-         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);
+           item.help = function (d3_event) {
+             d3_event.stopPropagation();
+             item.reference.toggle();
+           };
+
+           item.preset = preset;
+           item.reference = uiTagReference(preset.reference());
+           return item;
          }
 
-         function continueLine() {
-           if (context.mode().id !== 'draw-line') return chapter.restart();
+         function updateForFeatureHiddenState() {
+           if (!_entityIDs.every(context.hasEntity)) return;
+           var geometries = entityGeometries();
+           var button = context.container().selectAll('.preset-list .preset-list-button'); // remove existing tooltips
 
-           var entity = _tulipRoadID && context.hasEntity(_tulipRoadID);
+           button.call(uiTooltip().destroyAny);
+           button.each(function (item, index) {
+             var hiddenPresetFeaturesId;
 
-           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();
-           });
+             for (var i in geometries) {
+               hiddenPresetFeaturesId = context.features().isHiddenPreset(item.preset, geometries[i]);
+               if (hiddenPresetFeaturesId) break;
+             }
 
-           function continueTo(nextStep) {
-             context.on('enter.intro', null);
-             nextStep();
-           }
-         }
+             var isHiddenPreset = !context.inIntro() && !!hiddenPresetFeaturesId && (_currentPresets.length !== 1 || item.preset !== _currentPresets[0]);
+             select(this).classed('disabled', isHiddenPreset);
 
-         function chooseCategoryRoad() {
-           if (context.mode().id !== 'select') return chapter.restart();
-           context.on('exit.intro', function () {
-             return chapter.restart();
+             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 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 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);
+         presetList.autofocus = function (val) {
+           if (!arguments.length) return _autofocus;
+           _autofocus = val;
+           return presetList;
+         };
 
-           function continueTo(nextStep) {
-             context.container().select('.preset-list-button').on('click.intro', null);
-             context.on('exit.intro', null);
-             nextStep();
-           }
-         } // selected wrong road type
+         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());
 
-         function retryPresetResidential() {
-           if (context.mode().id !== 'select') return chapter.restart();
-           context.on('exit.intro', function () {
-             return chapter.restart();
-           }); // disallow scrolling
+             _currLoc = extent.center(); // match presets
 
-           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);
+             var presets = _entityIDs.map(function (entityID) {
+               return _mainPresetIndex.match(context.entity(entityID), context.graph());
              });
-           }, 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();
+             presetList.presets(presets);
            }
-         }
 
-         function nameRoad() {
-           context.on('exit.intro', function () {
-             continueTo(didNameRoad);
-           });
-           timeout(function () {
-             reveal('.entity-editor-pane', helpHtml('intro.lines.name_road', {
-               button: icon('#iD-icon-close', 'inline')
-             }), {
-               tooltipClass: 'intro-lines-name_road'
-             });
-           }, 500);
+           return presetList;
+         };
 
-           function continueTo(nextStep) {
-             context.on('exit.intro', null);
-             nextStep();
-           }
-         }
+         presetList.presets = function (val) {
+           if (!arguments.length) return _currentPresets;
+           _currentPresets = val;
+           return presetList;
+         };
 
-         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 entityGeometries() {
+           var counts = {};
 
-           function continueTo(nextStep) {
-             nextStep();
-           }
-         }
+           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)
 
-         function updateLine() {
-           context.history().reset('doneAddLine');
+             if (geometry === 'vertex' && entity.isOnAddressLine(context.graph())) {
+               geometry = 'point';
+             }
 
-           if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-             return chapter.restart();
+             if (!counts[geometry]) counts[geometry] = 0;
+             counts[geometry] += 1;
            }
 
-           var msec = transitionTime(woodRoadDragMidpoint, context.map().center());
+           return Object.keys(counts).sort(function (geom1, geom2) {
+             return counts[geom2] - counts[geom1];
+           });
+         }
 
-           if (msec) {
-             reveal(null, null, {
-               duration: 0
-             });
-           }
+         return utilRebind(presetList, dispatch, 'on');
+       }
 
-           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 uiViewOnOSM(context) {
+         var _what; // an osmEntity or osmNote
 
-             var advance = function advance() {
-               continueTo(addNode);
-             };
 
-             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 viewOnOSM(selection) {
+           var url;
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             nextStep();
+           if (_what instanceof osmEntity) {
+             url = context.connection().entityURL(_what);
+           } else if (_what instanceof osmNote) {
+             url = context.connection().noteURL(_what);
            }
+
+           var data = !_what || _what.isNew() ? [] : [_what];
+           var link = selection.selectAll('.view-on-osm').data(data, function (d) {
+             return d.id;
+           }); // exit
+
+           link.exit().remove(); // enter
+
+           var linkEnter = link.enter().append('a').attr('class', 'view-on-osm').attr('target', '_blank').attr('href', url).call(svgIcon('#iD-icon-out-link', 'inline'));
+           linkEnter.append('span').html(_t.html('inspector.view_on_osm'));
          }
 
-         function addNode() {
-           context.history().reset('doneAddLine');
+         viewOnOSM.what = function (_) {
+           if (!arguments.length) return _what;
+           _what = _;
+           return viewOnOSM;
+         };
 
-           if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-             return chapter.restart();
-           }
+         return viewOnOSM;
+       }
 
-           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);
-             }
+       function uiInspector(context) {
+         var presetList = uiPresetList(context);
+         var entityEditor = uiEntityEditor(context);
+         var wrap = select(null),
+             presetPane = select(null),
+             editorPane = select(null);
+         var _state = 'select';
 
-             if (changed.created().length === 1) {
-               timeout(function () {
-                 continueTo(startDragEndpoint);
-               }, 500);
-             }
-           });
-           context.on('enter.intro', function (mode) {
-             if (mode.id !== 'select') {
-               continueTo(updateLine);
-             }
-           });
+         var _entityIDs;
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.history().on('change.intro', null);
-             context.on('enter.intro', null);
-             nextStep();
-           }
-         }
+         var _newFeature = false;
 
-         function startDragEndpoint() {
-           if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-             return continueTo(updateLine);
-           }
+         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');
 
-           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 shouldDefaultToPresetList() {
+             // always show the inspector on hover
+             if (_state !== 'select') return false; // can only change preset on single selection
 
-             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 (_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 (entity.hasNonGeometryTags()) return false; // prompt to select preset if feature is new and untagged
 
-             if (geoSphericalDistance(entity.loc, woodRoadDragEndpoint) <= 4) {
-               continueTo(finishDragEndpoint);
-             }
-           });
+             if (_newFeature) return true; // all existing features except vertices should default to inspector
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             nextStep();
-           }
-         }
+             if (entity.geometry(context.graph()) !== 'vertex') return false; // show vertex relations if any
 
-         function finishDragEndpoint() {
-           if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-             return continueTo(updateLine);
-           }
+             if (context.graph().parentRelations(entity).length) return false; // show vertex issues if there are any
 
-           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);
-             }
+             if (context.validator().getEntityIssues(entityID).length) return false; // show turn retriction editor for junction vertices
 
-             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);
+             if (entity.isHighwayIntersection(context.graph())) return false; // otherwise show preset list for uninteresting vertices
 
-             if (geoSphericalDistance(entity.loc, woodRoadDragEndpoint) > 4) {
-               continueTo(startDragEndpoint);
-             }
-           });
-           context.on('enter.intro', function () {
-             continueTo(startDragMidpoint);
-           });
+             return true;
+           }
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.on('enter.intro', null);
-             nextStep();
+           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);
            }
+
+           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 startDragMidpoint() {
-           if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-             return continueTo(updateLine);
-           }
+         inspector.showList = function (presets) {
+           presetPane.classed('hide', false);
+           wrap.transition().styleTween('right', function () {
+             return interpolate$1('0%', '-100%');
+           }).on('end', function () {
+             editorPane.classed('hide', true);
+           });
 
-           if (context.selectedIDs().indexOf(woodRoadID) === -1) {
-             context.enter(modeSelect(context, [woodRoadID]));
+           if (presets) {
+             presetList.presets(presets);
            }
 
-           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);
-             }
+           presetPane.call(presetList.autofocus(true));
+         };
 
-             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
+         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);
              });
-           });
-           context.history().on('change.intro', function (changed) {
-             if (changed.created().length === 1) {
-               continueTo(continueDragMidpoint);
-             }
-           });
-           context.on('enter.intro', function (mode) {
-             if (mode.id !== 'select') {
-               // keep Wood Road selected so midpoint triangles are drawn..
-               context.enter(modeSelect(context, [woodRoadID]));
-             }
-           });
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.history().on('change.intro', null);
-             context.on('enter.intro', null);
-             nextStep();
-           }
-         }
+             if (preset) {
+               entityEditor.presets([preset]);
+             }
 
-         function continueDragMidpoint() {
-           if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-             return continueTo(updateLine);
+             editorPane.call(entityEditor);
            }
+         };
 
-           var padding = 100 * Math.pow(2, context.map().zoom() - 19);
-           var box = pad(woodRoadDragEndpoint, padding, context);
-           box.height += 400;
-
-           var advance = function advance() {
-             context.history().checkpoint('doneUpdateLine');
-             continueTo(deleteLines);
-           };
+         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
 
-           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);
-             }
+           context.container().selectAll('.field-help-body').remove();
+           return inspector;
+         };
 
-             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
-             });
-           });
+         inspector.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
+           _entityIDs = val;
+           return inspector;
+         };
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             nextStep();
-           }
-         }
+         inspector.newFeature = function (val) {
+           if (!arguments.length) return _newFeature;
+           _newFeature = val;
+           return inspector;
+         };
 
-         function deleteLines() {
-           context.history().reset('doneUpdateLine');
-           context.enter(modeBrowse(context));
+         return inspector;
+       }
 
-           if (!context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
-             return chapter.restart();
-           }
+       function uiImproveOsmComments() {
+         var _qaItem;
 
-           var msec = transitionTime(deleteLinesLoc, context.map().center());
+         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
 
-           if (msec) {
-             reveal(null, null, {
-               duration: 0
-             });
-           }
+           services.improveOSM.getComments(_qaItem).then(function (d) {
+             if (!d.comments) return; // nothing to do here
 
-           context.map().centerZoomEase(deleteLinesLoc, 18, msec);
-           timeout(function () {
-             var padding = 200 * Math.pow(2, context.map().zoom() - 18);
-             var box = pad(deleteLinesLoc, padding, context);
-             box.top -= 200;
-             box.height += 400;
+             var 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 advance = function advance() {
-               continueTo(rightClickIntersection);
-             };
+               if (osm && d.username) {
+                 selection = selection.append('a').attr('class', 'comment-author-link').attr('href', osm.userURL(d.username)).attr('target', '_blank');
+               }
 
-             reveal(box, helpHtml('intro.lines.delete_lines', {
-               street: _t('intro.graph.name.12th-avenue')
-             }), {
-               buttonText: _t.html('intro.ok'),
-               buttonCallback: advance
+               selection.html(function (d) {
+                 return d.username;
+               });
              });
-             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
+             metadataEnter.append('div').attr('class', 'comment-date').html(function (d) {
+               return _t.html('note.status.commented', {
+                 when: localeDateString(d.timestamp)
                });
              });
-             context.history().on('change.intro', function () {
-               timeout(function () {
-                 continueTo(deleteLines);
-               }, 500); // after any transition (e.g. if user deleted intersection)
+             mainEnter.append('div').attr('class', 'comment-text').append('p').html(function (d) {
+               return d.text;
              });
-           }, msec + 100);
-
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.history().on('change.intro', null);
-             nextStep();
-           }
+           })["catch"](function (err) {
+             console.log(err); // eslint-disable-line no-console
+           });
          }
 
-         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);
+         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 continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.on('enter.intro', null);
-             context.history().on('change.intro', null);
-             nextStep();
-           }
+           if (isNaN(d.getTime())) return null;
+           return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
          }
 
-         function splitIntersection() {
-           if (!context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
-             return continueTo(deleteLines);
-           }
+         issueComments.issue = function (val) {
+           if (!arguments.length) return _qaItem;
+           _qaItem = val;
+           return issueComments;
+         };
 
-           var node = selectMenuItem(context, 'split').node();
+         return issueComments;
+       }
 
-           if (!node) {
-             return continueTo(rightClickIntersection);
-           }
+       function uiImproveOsmDetails(context) {
+         var _qaItem;
 
-           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 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 (!wasChanged && !node) {
-               return continueTo(rightClickIntersection);
-             }
+           return _t.html("QA.improveOSM.error_types.".concat(issueKey, ".description"), d.replacements);
+         }
 
-             reveal('.edit-menu', helpHtml('intro.lines.split_intersection', {
-               street: _t('intro.graph.name.washington-street')
-             }), {
-               duration: 0,
-               padding: 50
-             });
+         function improveOsmDetails(selection) {
+           var details = selection.selectAll('.error-details').data(_qaItem ? [_qaItem] : [], function (d) {
+             return "".concat(d.id, "-").concat(d.status || 0);
            });
-           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);
+           details.exit().remove();
+           var detailsEnter = details.enter().append('div').attr('class', 'error-details qa-details-container'); // description
+
+           var descriptionEnter = detailsEnter.append('div').attr('class', 'qa-details-subsection');
+           descriptionEnter.append('h4').html(_t.html('QA.keepRight.detail_description'));
+           descriptionEnter.append('div').attr('class', 'qa-details-description-text').html(issueDetail); // If there are entity links in the error message..
+
+           var 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');
+
+               if (!osmlayer.enabled()) {
+                 osmlayer.enabled(true);
+               }
+
+               context.map().centerZoom(_qaItem.loc, 20);
+
+               if (entity) {
+                 context.enter(modeSelect(context, [entityID]));
                } else {
-                 _washingtonSegmentID = null;
-                 continueTo(retrySplit);
+                 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]));
+                 });
                }
-             }, 300); // after any transition (e.g. if user deleted intersection)
-           });
+             }); // Replace with friendly name if possible
+             // (The entity may not yet be loaded into the graph)
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.history().on('change.intro', null);
-             nextStep();
-           }
+             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
+               }
+
+               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 retrySplit() {
-           context.enter(modeBrowse(context));
-           context.map().centerZoomEase(eleventhAvenueEnd, 18, 500);
+         improveOsmDetails.issue = function (val) {
+           if (!arguments.length) return _qaItem;
+           _qaItem = val;
+           return improveOsmDetails;
+         };
 
-           var advance = function advance() {
-             continueTo(rightClickIntersection);
-           };
+         return improveOsmDetails;
+       }
 
-           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
+       function uiImproveOsmHeader() {
+         var _qaItem;
+
+         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
+
+           return _t.html("QA.improveOSM.error_types.".concat(issueKey, ".title"), d.replacements);
+         }
+
+         function improveOsmHeader(selection) {
+           var header = selection.selectAll('.qa-header').data(_qaItem ? [_qaItem] : [], function (d) {
+             return "".concat(d.id, "-").concat(d.status || 0);
            });
-           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
-             });
+           header.exit().remove();
+           var headerEnter = header.enter().append('div').attr('class', 'qa-header');
+           var svgEnter = headerEnter.append('div').attr('class', 'qa-header-icon').classed('new', function (d) {
+             return d.id < 0;
+           }).append('svg').attr('width', '20px').attr('height', '30px').attr('viewbox', '0 0 20 30').attr('class', function (d) {
+             return "preset-icon-28 qaItem ".concat(d.service, " itemId-").concat(d.id, " itemType-").concat(d.itemType);
            });
+           svgEnter.append('polygon').attr('fill', 'currentColor').attr('class', 'qaItem-fill').attr('points', '16,3 4,3 1,6 1,17 4,20 7,20 10,27 13,20 16,20 19,17.033 19,6');
+           svgEnter.append('use').attr('class', 'icon-annotation').attr('width', '13px').attr('height', '13px').attr('transform', 'translate(3.5, 5)').attr('xlink:href', function (d) {
+             var picon = d.icon;
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             nextStep();
-           }
+             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);
          }
 
-         function didSplit() {
-           if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
-             return continueTo(rightClickIntersection);
-           }
+         improveOsmHeader.issue = function (val) {
+           if (!arguments.length) return _qaItem;
+           _qaItem = val;
+           return improveOsmHeader;
+         };
 
-           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
+         return improveOsmHeader;
+       }
 
-           context.on('enter.intro', function () {
-             var ids = context.selectedIDs();
+       function uiImproveOsmEditor(context) {
+         var dispatch = dispatch$8('change');
+         var qaDetails = uiImproveOsmDetails(context);
+         var qaComments = uiImproveOsmComments();
+         var qaHeader = uiImproveOsmHeader();
 
-             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);
-             }
-           });
+         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 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);
          }
 
-         function multiSelect() {
-           if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
-             return continueTo(rightClickIntersection);
-           }
-
-           var ids = context.selectedIDs();
-           var hasWashington = ids.indexOf(_washingtonSegmentID) !== -1;
-           var hasTwelfth = ids.indexOf(twelfthAvenueID) !== -1;
+         function improveOsmSaveSection(selection) {
+           var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
 
-           if (hasWashington && hasTwelfth) {
-             return continueTo(multiRightClick);
-           } else if (!hasWashington && !hasTwelfth) {
-             return continueTo(didSplit);
-           }
+           var isShown = _qaItem && (isSelected || _qaItem.newComment || _qaItem.comment);
+           var saveSection = selection.selectAll('.qa-save').data(isShown ? [_qaItem] : [], function (d) {
+             return "".concat(d.id, "-").concat(d.status || 0);
+           }); // exit
 
-           context.map().centerZoomEase(twelfthAvenue, 18, 500);
-           timeout(function () {
-             var selected, other, padding, box;
+           saveSection.exit().remove(); // enter
 
-             if (hasWashington) {
-               selected = _t('intro.graph.name.washington-street');
-               other = _t('intro.graph.name.12th-avenue');
-               padding = 60 * Math.pow(2, context.map().zoom() - 18);
-               box = pad(twelfthAvenueEnd, padding, context);
-               box.width *= 3;
-             } else {
-               selected = _t('intro.graph.name.12th-avenue');
-               other = _t('intro.graph.name.washington-street');
-               padding = 200 * Math.pow(2, context.map().zoom() - 18);
-               box = pad(twelfthAvenue, padding, context);
-               box.width /= 2;
-             }
+           var 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
 
-             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;
-               }
+           saveSection = saveSectionEnter.merge(saveSection).call(qaSaveButtons);
 
-               reveal(box, helpHtml('intro.lines.multi_select', {
-                 selected: selected,
-                 other1: other
-               }) + ' ' + helpHtml('intro.lines.add_to_selection_' + (context.lastPointerType() === 'mouse' ? 'click' : 'touch'), {
-                 selected: selected,
-                 other2: other
-               }), {
-                 duration: 0
-               });
-             });
-             context.on('enter.intro', function () {
-               continueTo(multiSelect);
-             });
-             context.history().on('change.intro', function () {
-               if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
-                 return continueTo(rightClickIntersection);
-               }
-             });
-           }, 600);
+           function changeInput() {
+             var input = select(this);
+             var val = input.property('value').trim();
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.on('enter.intro', null);
-             context.history().on('change.intro', null);
-             nextStep();
-           }
-         }
+             if (val === '') {
+               val = undefined;
+             } // store the unsaved comment with the issue itself
 
-         function multiRightClick() {
-           if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
-             return continueTo(rightClickIntersection);
-           }
 
-           var padding = 200 * Math.pow(2, context.map().zoom() - 18);
-           var box = pad(twelfthAvenue, padding, context);
-           var rightClickString = helpHtml('intro.lines.multi_select_success') + helpHtml('intro.lines.multi_' + (context.lastPointerType() === 'mouse' ? 'rightclick' : 'edit_menu_touch'));
-           reveal(box, rightClickString);
-           context.map().on('move.intro drawn.intro', function () {
-             var padding = 200 * Math.pow(2, context.map().zoom() - 18);
-             var box = pad(twelfthAvenue, padding, context);
-             reveal(box, rightClickString, {
-               duration: 0
+             _qaItem = _qaItem.update({
+               newComment: val
              });
-           });
-           context.ui().editMenu().on('toggled.intro', function (open) {
-             if (!open) return;
-             timeout(function () {
-               var ids = context.selectedIDs();
+             var qaService = services.improveOSM;
 
-               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);
+             if (qaService) {
+               qaService.replaceItem(_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();
+             saveSection.call(qaSaveButtons);
            }
          }
 
-         function multiDelete() {
-           if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
-             return continueTo(rightClickIntersection);
-           }
+         function qaSaveButtons(selection) {
+           var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
 
-           var node = selectMenuItem(context, 'delete').node();
-           if (!node) return continueTo(multiRightClick);
-           reveal('.edit-menu', helpHtml('intro.lines.multi_delete'), {
-             padding: 50
-           });
-           context.map().on('move.intro drawn.intro', function () {
-             reveal('.edit-menu', helpHtml('intro.lines.multi_delete'), {
-               duration: 0,
-               padding: 50
-             });
-           });
-           context.on('exit.intro', function () {
-             if (context.hasEntity(_washingtonSegmentID) || context.hasEntity(twelfthAvenueID)) {
-               return continueTo(multiSelect); // left select mode but roads still exist
-             }
-           });
-           context.history().on('change.intro', function () {
-             if (context.hasEntity(_washingtonSegmentID) || context.hasEntity(twelfthAvenueID)) {
-               continueTo(retryDelete); // changed something but roads still exist
-             } else {
-               continueTo(play);
+           var buttonSection = selection.selectAll('.buttons').data(isSelected ? [_qaItem] : [], function (d) {
+             return d.status + d.id;
+           }); // exit
+
+           buttonSection.exit().remove(); // enter
+
+           var buttonEnter = buttonSection.enter().append('div').attr('class', 'buttons');
+           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
+
+             var qaService = services.improveOSM;
+
+             if (qaService) {
+               qaService.postUpdate(d, function (err, item) {
+                 return dispatch.call('change', item);
+               });
              }
            });
+           buttonSection.select('.close-button').html(function (d) {
+             var andComment = d.newComment ? '_comment' : '';
+             return _t.html("QA.keepRight.close".concat(andComment));
+           }).on('click.close', function (d3_event, d) {
+             this.blur(); // avoid keeping focus on the button - #4641
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.on('exit.intro', null);
-             context.history().on('change.intro', null);
-             nextStep();
-           }
-         }
+             var qaService = services.improveOSM;
 
-         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 (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
 
-           function continueTo(nextStep) {
-             nextStep();
-           }
-         }
+             var qaService = services.improveOSM;
 
-         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');
+             if (qaService) {
+               d.newStatus = 'INVALID';
+               qaService.postUpdate(d, function (err, item) {
+                 return dispatch.call('change', item);
+               });
              }
            });
-         }
-
-         chapter.enter = function () {
-           addLine();
-         };
+         } // NOTE: Don't change method name until UI v3 is merged
 
-         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);
-         };
 
-         chapter.restart = function () {
-           chapter.exit();
-           chapter.enter();
+         improveOsmEditor.error = function (val) {
+           if (!arguments.length) return _qaItem;
+           _qaItem = val;
+           return improveOsmEditor;
          };
 
-         return utilRebind(chapter, dispatch$1, 'on');
+         return utilRebind(improveOsmEditor, dispatch, 'on');
        }
 
-       function uiIntroBuilding(context, reveal) {
-         var dispatch$1 = dispatch('done');
-         var house = [-85.62815, 41.95638];
-         var tank = [-85.62732, 41.95347];
-         var buildingCatetory = _mainPresetIndex.item('category-building');
-         var housePreset = _mainPresetIndex.item('building/house');
-         var tankPreset = _mainPresetIndex.item('man_made/storage_tank');
-         var timeouts = [];
-         var _houseID = null;
-         var _tankID = null;
-         var chapter = {
-           title: 'intro.buildings.title'
-         };
+       function uiKeepRightDetails(context) {
+         var _qaItem;
 
-         function timeout(f, t) {
-           timeouts.push(window.setTimeout(f, t));
-         }
+         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
 
-         function eventCancel(d3_event) {
-           d3_event.stopPropagation();
-           d3_event.preventDefault();
-         }
+           var detail = _t.html("QA.keepRight.errorTypes.".concat(itemType, ".description"), replacements);
 
-         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);
-         }
+           if (detail === unknown) {
+             detail = _t.html("QA.keepRight.errorTypes.".concat(parentIssueType, ".description"), replacements);
+           }
 
-         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);
+           return detail;
          }
 
-         function addHouse() {
-           context.enter(modeBrowse(context));
-           context.history().reset('initial');
-           _houseID = null;
-           var msec = transitionTime(house, context.map().center());
+         function keepRightDetails(selection) {
+           var details = selection.selectAll('.error-details').data(_qaItem ? [_qaItem] : [], function (d) {
+             return "".concat(d.id, "-").concat(d.status || 0);
+           });
+           details.exit().remove();
+           var detailsEnter = details.enter().append('div').attr('class', 'error-details qa-details-container'); // description
 
-           if (msec) {
-             reveal(null, null, {
-               duration: 0
-             });
-           }
+           var descriptionEnter = detailsEnter.append('div').attr('class', 'qa-details-subsection');
+           descriptionEnter.append('h4').html(_t.html('QA.keepRight.detail_description'));
+           descriptionEnter.append('div').attr('class', 'qa-details-description-text').html(issueDetail); // If there are entity links in the error message..
 
-           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);
+           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 continueTo(nextStep) {
-             context.on('enter.intro', null);
-             nextStep();
-           }
-         }
+             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');
 
-         function startHouse() {
-           if (context.mode().id !== 'add-area') {
-             return continueTo(addHouse);
-           }
+               if (!osmlayer.enabled()) {
+                 osmlayer.enabled(true);
+               }
 
-           _houseID = null;
-           context.map().zoomEase(20, 500);
-           timeout(function () {
-             var startString = helpHtml('intro.buildings.start_building') + helpHtml('intro.buildings.building_corner_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap'));
-             revealHouse(house, startString);
-             context.map().on('move.intro drawn.intro', function () {
-               revealHouse(house, startString, {
-                 duration: 0
-               });
-             });
-             context.on('enter.intro', function (mode) {
-               if (mode.id !== 'draw-area') return chapter.restart();
-               continueTo(continueHouse);
-             });
-           }, 550); // after easing
+               context.map().centerZoomEase(_qaItem.loc, 20);
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.on('enter.intro', null);
-             nextStep();
-           }
-         }
+               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)
 
-         function continueHouse() {
-           if (context.mode().id !== 'draw-area') {
-             return continueTo(addHouse);
-           }
+             if (entity) {
+               var name = utilDisplayName(entity); // try to use common name
 
-           _houseID = null;
-           var continueString = helpHtml('intro.buildings.continue_building') + '{br}' + helpHtml('intro.areas.finish_area_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap')) + helpHtml('intro.buildings.finish_building');
-           revealHouse(house, continueString);
-           context.map().on('move.intro drawn.intro', function () {
-             revealHouse(house, continueString, {
-               duration: 0
-             });
-           });
-           context.on('enter.intro', function (mode) {
-             if (mode.id === 'draw-area') {
-               return;
-             } else if (mode.id === 'select') {
-               var graph = context.graph();
-               var way = context.entity(context.selectedIDs()[0]);
-               var nodes = graph.childNodes(way);
-               var points = utilArrayUniq(nodes).map(function (n) {
-                 return context.projection(n.loc);
-               });
+               if (!name && !isObjectLink) {
+                 var preset = _mainPresetIndex.match(entity, context.graph());
+                 name = preset && !preset.isFallback() && preset.name(); // fallback to preset name
+               }
 
-               if (isMostlySquare(points)) {
-                 _houseID = way.id;
-                 return continueTo(chooseCategoryBuilding);
-               } else {
-                 return continueTo(retryHouse);
+               if (name) {
+                 this.innerText = name;
                }
-             } else {
-               return chapter.restart();
              }
-           });
+           }); // Don't hide entities related to this issue - #5880
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.on('enter.intro', null);
-             nextStep();
-           }
+           context.features().forceVisible(relatedEntities);
+           context.map().pan([0, 0]); // trigger a redraw
          }
 
-         function retryHouse() {
-           var onClick = function onClick() {
-             continueTo(addHouse);
-           };
+         keepRightDetails.issue = function (val) {
+           if (!arguments.length) return _qaItem;
+           _qaItem = val;
+           return keepRightDetails;
+         };
 
-           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 keepRightDetails;
+       }
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             nextStep();
+       function uiKeepRightHeader() {
+         var _qaItem;
+
+         function issueTitle(d) {
+           var itemType = d.itemType,
+               parentIssueType = d.parentIssueType;
+           var unknown = _t.html('inspector.unknown');
+           var replacements = d.replacements || {};
+           replacements["default"] = unknown; // special key `default` works as a fallback string
+
+           var title = _t.html("QA.keepRight.errorTypes.".concat(itemType, ".title"), replacements);
+
+           if (title === unknown) {
+             title = _t.html("QA.keepRight.errorTypes.".concat(parentIssueType, ".title"), replacements);
            }
+
+           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 chooseCategoryBuilding() {
-           if (!_houseID || !context.hasEntity(_houseID)) {
-             return addHouse();
-           }
-
-           var ids = context.selectedIDs();
+         keepRightHeader.issue = function (val) {
+           if (!arguments.length) return _qaItem;
+           _qaItem = val;
+           return keepRightHeader;
+         };
 
-           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
-             context.enter(modeSelect(context, [_houseID]));
-           } // disallow scrolling
+         return keepRightHeader;
+       }
 
+       function uiViewOnKeepRight() {
+         var _qaItem;
 
-           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 viewOnKeepRight(selection) {
+           var url;
 
-           context.on('enter.intro', function (mode) {
-             if (!_houseID || !context.hasEntity(_houseID)) {
-               return continueTo(addHouse);
-             }
+           if (services.keepRight && _qaItem instanceof QAItem) {
+             url = services.keepRight.issueURL(_qaItem);
+           }
 
-             var ids = context.selectedIDs();
+           var link = selection.selectAll('.view-on-keepRight').data(url ? [url] : []); // exit
 
-             if (mode.id !== 'select' || !ids.length || ids[0] !== _houseID) {
-               return continueTo(chooseCategoryBuilding);
-             }
-           });
+           link.exit().remove(); // enter
 
-           function continueTo(nextStep) {
-             context.container().select('.inspector-wrap').on('wheel.intro', null);
-             context.container().select('.preset-list-button').on('click.intro', null);
-             context.on('enter.intro', null);
-             nextStep();
-           }
+           var 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 choosePresetHouse() {
-           if (!_houseID || !context.hasEntity(_houseID)) {
-             return addHouse();
-           }
+         viewOnKeepRight.what = function (val) {
+           if (!arguments.length) return _qaItem;
+           _qaItem = val;
+           return viewOnKeepRight;
+         };
 
-           var ids = context.selectedIDs();
+         return viewOnKeepRight;
+       }
 
-           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
-             context.enter(modeSelect(context, [_houseID]));
-           } // disallow scrolling
+       function uiKeepRightEditor(context) {
+         var dispatch = dispatch$8('change');
+         var qaDetails = uiKeepRightDetails(context);
+         var qaHeader = uiKeepRightHeader();
 
+         var _qaItem;
 
-           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..
+         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));
+         }
 
-           context.on('enter.intro', function (mode) {
-             if (!_houseID || !context.hasEntity(_houseID)) {
-               return continueTo(addHouse);
-             }
+         function keepRightSaveSection(selection) {
+           var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
 
-             var ids = context.selectedIDs();
+           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
 
-             if (mode.id !== 'select' || !ids.length || ids[0] !== _houseID) {
-               return continueTo(chooseCategoryBuilding);
-             }
-           });
+           saveSection.exit().remove(); // enter
 
-           function continueTo(nextStep) {
-             context.container().select('.inspector-wrap').on('wheel.intro', null);
-             context.container().select('.preset-list-button').on('click.intro', null);
-             context.on('enter.intro', null);
-             nextStep();
-           }
-         }
+           var 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 closeEditorHouse() {
-           if (!_houseID || !context.hasEntity(_houseID)) {
-             return addHouse();
-           }
+           saveSection = saveSectionEnter.merge(saveSection).call(qaSaveButtons);
 
-           var ids = context.selectedIDs();
+           function changeInput() {
+             var input = select(this);
+             var val = input.property('value').trim();
 
-           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
-             context.enter(modeSelect(context, [_houseID]));
-           }
+             if (val === _qaItem.comment) {
+               val = undefined;
+             } // store the unsaved comment with the issue itself
 
-           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);
 
-           function continueTo(nextStep) {
-             context.on('exit.intro', null);
-             nextStep();
-           }
-         }
+             _qaItem = _qaItem.update({
+               newComment: val
+             });
+             var qaService = services.keepRight;
 
-         function rightClickHouse() {
-           if (!_houseID) return chapter.restart();
-           context.enter(modeBrowse(context));
-           context.history().reset('hasHouse');
-           var zoom = context.map().zoom();
+             if (qaService) {
+               qaService.replaceItem(_qaItem); // update keepright cache
+             }
 
-           if (zoom < 20) {
-             zoom = 20;
+             saveSection.call(qaSaveButtons);
            }
+         }
 
-           context.map().centerZoomEase(house, zoom, 500);
-           context.on('enter.intro', function (mode) {
-             if (mode.id !== 'select') return;
-             var ids = context.selectedIDs();
-             if (ids.length !== 1 || ids[0] !== _houseID) return;
-             timeout(function () {
-               var node = selectMenuItem(context, 'orthogonalize').node();
-               if (!node) return;
-               continueTo(clickSquare);
-             }, 50); // after menu visible
-           });
-           context.map().on('move.intro drawn.intro', function () {
-             var rightclickString = helpHtml('intro.buildings.' + (context.lastPointerType() === 'mouse' ? 'rightclick_building' : 'edit_menu_building_touch'));
-             revealHouse(house, rightclickString, {
-               duration: 0
-             });
-           });
-           context.history().on('change.intro', function () {
-             continueTo(rightClickHouse);
-           });
+         function qaSaveButtons(selection) {
+           var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
 
-           function continueTo(nextStep) {
-             context.on('enter.intro', null);
-             context.map().on('move.intro drawn.intro', null);
-             context.history().on('change.intro', null);
-             nextStep();
-           }
-         }
+           var buttonSection = selection.selectAll('.buttons').data(isSelected ? [_qaItem] : [], function (d) {
+             return d.status + d.id;
+           }); // exit
 
-         function clickSquare() {
-           if (!_houseID) return chapter.restart();
-           var entity = context.hasEntity(_houseID);
-           if (!entity) return continueTo(rightClickHouse);
-           var node = selectMenuItem(context, 'orthogonalize').node();
+           buttonSection.exit().remove(); // enter
 
-           if (!node) {
-             return continueTo(rightClickHouse);
-           }
+           var buttonEnter = buttonSection.enter().append('div').attr('class', 'buttons');
+           buttonEnter.append('button').attr('class', 'button comment-button action').html(_t.html('QA.keepRight.save_comment'));
+           buttonEnter.append('button').attr('class', 'button close-button action');
+           buttonEnter.append('button').attr('class', 'button ignore-button action'); // update
 
-           var 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();
+           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
 
-             if (!wasChanged && !node) {
-               return continueTo(rightClickHouse);
-             }
+             var qaService = services.keepRight;
 
-             reveal('.edit-menu', helpHtml('intro.buildings.square_building'), {
-               duration: 0,
-               padding: 50
-             });
+             if (qaService) {
+               qaService.postUpdate(d, function (err, item) {
+                 return dispatch.call('change', item);
+               });
+             }
            });
-           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.
+           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
 
-             timeout(function () {
-               if (context.history().undoAnnotation() === _t('operations.orthogonalize.annotation.feature', {
-                 n: 1
-               })) {
-                 continueTo(doneSquare);
-               } else {
-                 continueTo(retryClickSquare);
-               }
-             }, 500); // after transitioned actions
-           });
+             var qaService = services.keepRight;
 
-           function continueTo(nextStep) {
-             context.on('enter.intro', null);
-             context.map().on('move.intro', null);
-             context.history().on('change.intro', null);
-             nextStep();
-           }
-         }
+             if (qaService) {
+               d.newStatus = 'ignore_t'; // ignore temporarily (item fixed)
 
-         function retryClickSquare() {
-           context.enter(modeBrowse(context));
-           revealHouse(house, helpHtml('intro.buildings.retry_square'), {
-             buttonText: _t.html('intro.ok'),
-             buttonCallback: function buttonCallback() {
-               continueTo(rightClickHouse);
+               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
 
-           function continueTo(nextStep) {
-             nextStep();
-           }
-         }
+             var qaService = services.keepRight;
 
-         function doneSquare() {
-           context.history().checkpoint('doneSquare');
-           revealHouse(house, helpHtml('intro.buildings.done_square'), {
-             buttonText: _t.html('intro.ok'),
-             buttonCallback: function buttonCallback() {
-               continueTo(addTank);
+             if (qaService) {
+               d.newStatus = 'ignore'; // ignore permanently (false positive)
+
+               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) {
-             nextStep();
-           }
-         }
 
-         function addTank() {
-           context.enter(modeBrowse(context));
-           context.history().reset('doneSquare');
-           _tankID = null;
-           var msec = transitionTime(tank, context.map().center());
+         keepRightEditor.error = function (val) {
+           if (!arguments.length) return _qaItem;
+           _qaItem = val;
+           return keepRightEditor;
+         };
 
-           if (msec) {
-             reveal(null, null, {
-               duration: 0
-             });
-           }
+         return utilRebind(keepRightEditor, dispatch, 'on');
+       }
 
-           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);
+       function uiOsmoseDetails(context) {
+         var _qaItem;
 
-           function continueTo(nextStep) {
-             context.on('enter.intro', null);
-             nextStep();
-           }
+         function issueString(d, type) {
+           if (!d) return ''; // Issue strings are cached from Osmose API
+
+           var s = services.osmose.getStrings(d.itemType);
+           return type in s ? s[type] : '';
          }
 
-         function startTank() {
-           if (context.mode().id !== 'add-area') {
-             return continueTo(addTank);
-           }
+         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
 
-           _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
+           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)
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.on('enter.intro', null);
-             nextStep();
-           }
-         }
 
-         function continueTank() {
-           if (context.mode().id !== 'draw-area') {
-             return continueTo(addTank);
-           }
+           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)
 
-           _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 (issueString(_qaItem, 'fix')) {
+             var _div = detailsEnter.append('div').attr('class', 'qa-details-subsection');
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.on('enter.intro', null);
-             nextStep();
-           }
-         }
+             _div.append('h4').html(_t.html('QA.osmose.fix_title'));
 
-         function searchPresetTank() {
-           if (!_tankID || !context.hasEntity(_tankID)) {
-             return addTank();
-           }
+             _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)
 
-           var ids = context.selectedIDs();
 
-           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _tankID) {
-             context.enter(modeSelect(context, [_tankID]));
-           } // disallow scrolling
+           if (issueString(_qaItem, 'trap')) {
+             var _div2 = detailsEnter.append('div').attr('class', 'qa-details-subsection');
 
+             _div2.append('h4').html(_t.html('QA.osmose.trap_title'));
 
-           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..
+             _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
 
-           context.on('enter.intro', function (mode) {
-             if (!_tankID || !context.hasEntity(_tankID)) {
-               return continueTo(addTank);
-             }
 
-             var ids = context.selectedIDs();
+           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 (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..
+             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
 
-               context.container().select('.inspector-wrap .panewrap').style('right', '-100%'); // disallow scrolling
+             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
 
-               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 checkPresetSearch() {
-             var first = context.container().select('.preset-list-item:first-child');
+             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
 
-             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);
-               });
-             }
-           }
+               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);
+                 }
 
-           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();
-           }
-         }
+                 context.map().centerZoom(d.loc, 20);
 
-         function closeEditorTank() {
-           if (!_tankID || !context.hasEntity(_tankID)) {
-             return addTank();
-           }
+                 if (entity) {
+                   context.enter(modeSelect(context, [entityID]));
+                 } else {
+                   context.loadEntity(entityID, function (err, result) {
+                     if (err) return;
+                     var entity = result.data.find(function (e) {
+                       return e.id === entityID;
+                     });
+                     if (entity) context.enter(modeSelect(context, [entityID]));
+                   });
+                 }
+               }); // Replace with friendly name if possible
+               // (The entity may not yet be loaded into the graph)
 
-           var ids = context.selectedIDs();
+               if (entity) {
+                 var name = utilDisplayName(entity); // try to use common name
 
-           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _tankID) {
-             context.enter(modeSelect(context, [_tankID]));
-           }
+                 if (!name) {
+                   var preset = _mainPresetIndex.match(entity, context.graph());
+                   name = preset && !preset.isFallback() && preset.name(); // fallback to preset name
+                 }
 
-           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);
+                 if (name) {
+                   this.innerText = name;
+                 }
+               }
+             }); // Don't hide entities related to this issue - #5880
 
-           function continueTo(nextStep) {
-             context.on('exit.intro', null);
-             nextStep();
-           }
+             context.features().forceVisible(d.elems);
+             context.map().pan([0, 0]); // trigger a redraw
+           })["catch"](function (err) {
+             console.log(err); // eslint-disable-line no-console
+           });
          }
 
-         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);
+         osmoseDetails.issue = function (val) {
+           if (!arguments.length) return _qaItem;
+           _qaItem = val;
+           return osmoseDetails;
+         };
 
-           function continueTo(nextStep) {
-             context.on('enter.intro', null);
-             context.map().on('move.intro drawn.intro', null);
-             context.history().on('change.intro', null);
-             nextStep();
-           }
-         }
+         return osmoseDetails;
+       }
 
-         function clickCircle() {
-           if (!_tankID) return chapter.restart();
-           var entity = context.hasEntity(_tankID);
-           if (!entity) return continueTo(rightClickTank);
-           var node = selectMenuItem(context, 'circularize').node();
+       function uiOsmoseHeader() {
+         var _qaItem;
 
-           if (!node) {
-             return continueTo(rightClickTank);
-           }
+         function issueTitle(d) {
+           var unknown = _t('inspector.unknown');
+           if (!d) return unknown; // Issue titles supplied by Osmose
 
-           var wasChanged = false;
-           reveal('.edit-menu', helpHtml('intro.buildings.circle_tank'), {
-             padding: 50
+           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);
            });
-           context.on('enter.intro', function (mode) {
-             if (mode.id === 'browse') {
-               continueTo(rightClickTank);
-             } else if (mode.id === 'move' || mode.id === 'rotate') {
-               continueTo(retryClickCircle);
-             }
+           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.map().on('move.intro', function () {
-             var node = selectMenuItem(context, 'circularize').node();
+           svgEnter.append('polygon').attr('fill', function (d) {
+             return services.osmose.getColor(d.item);
+           }).attr('class', 'qaItem-fill').attr('points', '16,3 4,3 1,6 1,17 4,20 7,20 10,27 13,20 16,20 19,17.033 19,6');
+           svgEnter.append('use').attr('class', 'icon-annotation').attr('width', '13px').attr('height', '13px').attr('transform', 'translate(3.5, 5)').attr('xlink:href', function (d) {
+             var picon = d.icon;
 
-             if (!wasChanged && !node) {
-               return continueTo(rightClickTank);
+             if (!picon) {
+               return '';
+             } else {
+               var isMaki = /^maki-/.test(picon);
+               return "#".concat(picon).concat(isMaki ? '-11' : '');
              }
-
-             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.
+           headerEnter.append('div').attr('class', 'qa-header-label').html(issueTitle);
+         }
 
-             timeout(function () {
-               if (context.history().undoAnnotation() === _t('operations.circularize.annotation.feature', {
-                 n: 1
-               })) {
-                 continueTo(play);
-               } else {
-                 continueTo(retryClickCircle);
-               }
-             }, 500); // after transitioned actions
-           });
+         osmoseHeader.issue = function (val) {
+           if (!arguments.length) return _qaItem;
+           _qaItem = val;
+           return osmoseHeader;
+         };
 
-           function continueTo(nextStep) {
-             context.on('enter.intro', null);
-             context.map().on('move.intro', null);
-             context.history().on('change.intro', null);
-             nextStep();
-           }
-         }
+         return osmoseHeader;
+       }
 
-         function retryClickCircle() {
-           context.enter(modeBrowse(context));
-           revealTank(tank, helpHtml('intro.buildings.retry_circle'), {
-             buttonText: _t.html('intro.ok'),
-             buttonCallback: function buttonCallback() {
-               continueTo(rightClickTank);
-             }
-           });
+       function uiViewOnOsmose() {
+         var _qaItem;
 
-           function continueTo(nextStep) {
-             nextStep();
+         function viewOnOsmose(selection) {
+           var url;
+
+           if (services.osmose && _qaItem instanceof QAItem) {
+             url = services.osmose.itemURL(_qaItem);
            }
-         }
 
-         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');
-             }
-           });
-         }
+           var link = selection.selectAll('.view-on-osmose').data(url ? [url] : []); // exit
 
-         chapter.enter = function () {
-           addHouse();
-         };
+           link.exit().remove(); // enter
 
-         chapter.exit = function () {
-           timeouts.forEach(window.clearTimeout);
-           context.on('enter.intro exit.intro', null);
-           context.map().on('move.intro drawn.intro', null);
-           context.history().on('change.intro', null);
-           context.container().select('.inspector-wrap').on('wheel.intro', null);
-           context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
-           context.container().select('.more-fields .combobox-input').on('click.intro', null);
-         };
+           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'));
+         }
 
-         chapter.restart = function () {
-           chapter.exit();
-           chapter.enter();
+         viewOnOsmose.what = function (val) {
+           if (!arguments.length) return _qaItem;
+           _qaItem = val;
+           return viewOnOsmose;
          };
 
-         return utilRebind(chapter, dispatch$1, 'on');
+         return viewOnOsmose;
        }
 
-       function uiIntroStartEditing(context, reveal) {
-         var dispatch$1 = dispatch('done', 'startEditing');
-         var modalSelection = select(null);
-         var chapter = {
-           title: 'intro.startediting.title'
-         };
+       function uiOsmoseEditor(context) {
+         var dispatch = dispatch$8('change');
+         var qaDetails = uiOsmoseDetails(context);
+         var qaHeader = uiOsmoseHeader();
 
-         function showHelp() {
-           reveal('.map-control.help-control', helpHtml('intro.startediting.help'), {
-             buttonText: _t.html('intro.ok'),
-             buttonCallback: function buttonCallback() {
-               shortcuts();
-             }
-           });
-         }
+         var _qaItem;
 
-         function shortcuts() {
-           reveal('.map-control.help-control', helpHtml('intro.startediting.shortcuts'), {
-             buttonText: _t.html('intro.ok'),
-             buttonCallback: function buttonCallback() {
-               showSave();
-             }
-           });
+         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));
          }
 
-         function showSave() {
-           context.container().selectAll('.shaded').remove(); // in case user opened keyboard shortcuts
+         function osmoseSaveSection(selection) {
+           var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
 
-           reveal('.top-toolbar button.save', helpHtml('intro.startediting.save'), {
-             buttonText: _t.html('intro.ok'),
-             buttonCallback: function buttonCallback() {
-               showStart();
-             }
-           });
-         }
+           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 showStart() {
-           context.container().selectAll('.shaded').remove(); // in case user opened keyboard shortcuts
+           saveSection.exit().remove(); // enter
 
-           modalSelection = uiModal(context.container());
-           modalSelection.select('.modal').attr('class', 'modal-splash modal');
-           modalSelection.selectAll('.close').remove();
-           var startbutton = modalSelection.select('.content').attr('class', 'fillL').append('button').attr('class', 'modal-section huge-modal-button').on('click', function () {
-             modalSelection.remove();
-           });
-           startbutton.append('svg').attr('class', 'illustration').append('use').attr('xlink:href', '#iD-logo-walkthrough');
-           startbutton.append('h2').html(_t.html('intro.startediting.start'));
-           dispatch$1.call('startEditing');
+           var saveSectionEnter = saveSection.enter().append('div').attr('class', 'qa-save save-section cf'); // update
+
+           saveSection = saveSectionEnter.merge(saveSection).call(qaSaveButtons);
          }
 
-         chapter.enter = function () {
-           showHelp();
-         };
+         function qaSaveButtons(selection) {
+           var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
 
-         chapter.exit = function () {
-           modalSelection.remove();
-           context.container().selectAll('.shaded').remove(); // in case user opened keyboard shortcuts
-         };
+           var buttonSection = selection.selectAll('.buttons').data(isSelected ? [_qaItem] : [], function (d) {
+             return d.status + d.id;
+           }); // exit
 
-         return utilRebind(chapter, dispatch$1, 'on');
-       }
+           buttonSection.exit().remove(); // enter
 
-       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 buttonEnter = buttonSection.enter().append('div').attr('class', 'buttons');
+           buttonEnter.append('button').attr('class', 'button close-button action');
+           buttonEnter.append('button').attr('class', 'button ignore-button action'); // update
 
-         var _currChapter;
+           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
 
-         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 qaService = services.osmose;
 
-             selection.call(startIntro);
-           })["catch"](function () {
-             /* ignore */
+             if (qaService) {
+               d.newStatus = 'done';
+               qaService.postUpdate(d, function (err, item) {
+                 return dispatch.call('change', item);
+               });
+             }
            });
-         }
-
-         function startIntro(selection) {
-           context.enter(modeBrowse(context)); // Save current map state
+           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
 
-           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)`)
+             var qaService = services.osmose;
 
-           context.ui().sidebar.expand();
-           context.container().selectAll('button.sidebar-toggle').classed('disabled', true); // Block saving
+             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
 
-           context.inIntro(true); // Load semi-real data used in intro
 
-           if (osm) {
-             osm.toggle(false).reset();
-           }
+         osmoseEditor.error = function (val) {
+           if (!arguments.length) return _qaItem;
+           _qaItem = val;
+           return osmoseEditor;
+         };
 
-           context.history().reset();
-           context.history().merge(Object.values(coreGraph().load(_introGraph).entities));
-           context.history().checkpoint('initial'); // Setup imagery
+         return utilRebind(osmoseEditor, dispatch, 'on');
+       }
 
-           var imagery = context.background().findSource(INTRO_IMAGERY);
+       function uiNoteComments() {
+         var _note;
 
-           if (imagery) {
-             context.background().baseLayerSource(imagery);
-           } else {
-             context.background().bing();
-           }
+         function noteComments(selection) {
+           if (_note.isNew()) return; // don't draw .comments-container
 
-           overlays.forEach(function (d) {
-             return context.background().toggleOverlayLayer(d);
-           }); // Setup data layers (only OSM)
+           var comments = selection.selectAll('.comments-container').data([0]);
+           comments = comments.enter().append('div').attr('class', 'comments-container').merge(comments);
+           var commentEnter = comments.selectAll('.comment').data(_note.comments).enter().append('div').attr('class', 'comment');
+           commentEnter.append('div').attr('class', function (d) {
+             return 'comment-avatar user-' + d.uid;
+           }).call(svgIcon('#iD-icon-avatar', 'comment-avatar-icon'));
+           var mainEnter = commentEnter.append('div').attr('class', 'comment-main');
+           var metadataEnter = mainEnter.append('div').attr('class', 'comment-metadata');
+           metadataEnter.append('div').attr('class', 'comment-author').each(function (d) {
+             var selection = select(this);
+             var osm = services.osm;
 
-           var 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');
+             if (osm && d.user) {
+               selection = selection.append('a').attr('class', 'comment-author-link').attr('href', osm.userURL(d.user)).attr('target', '_blank');
              }
-           });
-           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..
-
-           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);
+             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);
+         }
 
-               if (i < chapterFlow.length - 1) {
-                 var next = chapterFlow[i + 1];
-                 context.container().select("button.chapter-".concat(next)).classed('next', true);
-               } // Store walkthrough progress..
+         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
 
+           _note.comments.forEach(function (d) {
+             if (d.uid) uids[d.uid] = true;
+           });
 
-               progress.push(chapter);
-               corePreferences('walkthrough_progress', utilArrayUniq(progress).join(';'));
+           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);
              });
-             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..
-
-             var incomplete = utilArrayDifference(chapterFlow, progress);
+         }
 
-             if (!incomplete.length) {
-               corePreferences('walkthrough_completed', 'yes');
-             }
+         function localeDateString(s) {
+           if (!s) return null;
+           var options = {
+             day: 'numeric',
+             month: 'short',
+             year: 'numeric'
+           };
+           s = s.replace(/-/g, '/'); // fix browser-specific Date() issues
 
-             curtain.remove();
-             navwrap.remove();
-             context.container().selectAll('.main-map .layer-background').style('opacity', opacity);
-             context.container().selectAll('button.sidebar-toggle').classed('disabled', false);
+           var d = new Date(s);
+           if (isNaN(d.getTime())) return null;
+           return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
+         }
 
-             if (osm) {
-               osm.toggle(true).reset().caches(caches);
-             }
+         noteComments.note = function (val) {
+           if (!arguments.length) return _note;
+           _note = val;
+           return noteComments;
+         };
 
-             context.history().reset().merge(Object.values(baseEntities));
-             context.background().baseLayerSource(background);
-             overlays.forEach(function (d) {
-               return context.background().toggleOverlayLayer(d);
-             });
+         return noteComments;
+       }
 
-             if (history) {
-               context.history().fromJSON(history, false);
-             }
+       function uiNoteHeader() {
+         var _note;
 
-             context.map().centerZoom(center, zoom);
-             window.location.replace(hash);
-             context.inIntro(false);
+         function noteHeader(selection) {
+           var header = selection.selectAll('.note-header').data(_note ? [_note] : [], function (d) {
+             return d.status + d.id;
            });
-           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);
+           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;
            });
-           buttons.append('span').attr('class', 'status').call(svgIcon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward', 'inline'));
-           enterChapter(null, chapters[0]);
+           iconEnter.append('div').attr('class', 'preset-icon-28').call(svgIcon('#iD-icon-note', 'note-fill'));
+           iconEnter.each(function (d) {
+             var statusIcon;
 
-           function enterChapter(d3_event, newChapter) {
-             if (_currChapter) {
-               _currChapter.exit();
+             if (d.id < 0) {
+               statusIcon = '#iD-icon-plus';
+             } else if (d.status === 'open') {
+               statusIcon = '#iD-icon-close';
+             } else {
+               statusIcon = '#iD-icon-apply';
              }
 
-             context.enter(modeBrowse(context));
-             _currChapter = newChapter;
-
-             _currChapter.enter();
+             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');
+             }
 
-             buttons.classed('next', false).classed('active', function (d) {
-               return d.title === _currChapter.title;
-             });
-           }
+             return _t('note.note') + ' ' + d.id + ' ' + (d.status === 'closed' ? _t('note.closed') : '');
+           });
          }
 
-         return intro;
-       }
-
-       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'
+         noteHeader.note = function (val) {
+           if (!arguments.length) return _note;
+           _note = val;
+           return noteHeader;
          };
 
-         function update(selection) {
-           var shownItems = [];
-           var liveIssues = context.validator().getIssues({
-             what: corePreferences('validate-what') || 'edited',
-             where: corePreferences('validate-where') || 'all'
-           });
+         return noteHeader;
+       }
 
-           if (liveIssues.length) {
-             warningsItem.count = liveIssues.length;
-             shownItems.push(warningsItem);
-           }
+       function uiNoteReport() {
+         var _note;
 
-           if (corePreferences('validate-what') === 'all') {
-             var resolvedIssues = context.validator().getResolvedIssues();
+         function noteReport(selection) {
+           var url;
 
-             if (resolvedIssues.length) {
-               resolvedItem.count = resolvedIssues.length;
-               shownItems.push(resolvedItem);
-             }
+           if (services.osm && _note instanceof osmNote && !_note.isNew()) {
+             url = services.osm.noteReportURL(_note);
            }
 
-           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('.note-report').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', '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'));
          }
 
-         return function (selection) {
-           update(selection);
-           context.validator().on('validated.infobox', function () {
-             update(selection);
-           });
+         noteReport.note = function (val) {
+           if (!arguments.length) return _note;
+           _note = val;
+           return noteReport;
          };
-       }
 
-       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 noteReport;
+       }
 
-           var _dMini; // dimensions of minimap
+       function uiNoteEditor(context) {
+         var dispatch = dispatch$8('change');
+         var noteComments = uiNoteComments();
+         var noteHeader = uiNoteHeader(); // var formFields = uiFormFields(context);
 
+         var _note;
 
-           var _cMini; // center pixel of minimap
+         var _newNote; // var _fieldsArr;
 
 
-           var _tStart; // transform at start of gesture
+         function noteEditor(selection) {
+           var header = selection.selectAll('.header').data([0]);
+           var headerEnter = header.enter().append('div').attr('class', 'header fillL');
+           headerEnter.append('button').attr('class', 'close').on('click', function () {
+             context.enter(modeBrowse(context));
+           }).call(svgIcon('#iD-icon-close'));
+           headerEnter.append('h3').html(_t.html('note.title'));
+           var body = selection.selectAll('.body').data([0]);
+           body = body.enter().append('div').attr('class', 'body').merge(body);
+           var editor = body.selectAll('.note-editor').data([0]);
+           editor.enter().append('div').attr('class', 'modal-section note-editor').merge(editor).call(noteHeader.note(_note)).call(noteComments.note(_note)).call(noteSaveSection);
+           var footer = selection.selectAll('.footer').data([0]);
+           footer.enter().append('div').attr('class', 'footer').merge(footer).call(uiViewOnOSM(context).what(_note)).call(uiNoteReport().note(_note)); // rerender the note editor on any auth change
 
+           var osm = services.osm;
 
-           var _tCurr; // transform at most recent event
+           if (osm) {
+             osm.on('change.note-save', function () {
+               selection.call(noteEditor);
+             });
+           }
+         }
 
+         function noteSaveSection(selection) {
+           var isSelected = _note && _note.id === context.selectedNoteID();
 
-           var _timeoutID;
+           var noteSave = selection.selectAll('.note-save').data(isSelected ? [_note] : [], function (d) {
+             return d.status + d.id;
+           }); // exit
 
-           function zoomStarted() {
-             if (_skipEvents) return;
-             _tStart = _tCurr = projection.transform();
-             _gesture = null;
-           }
+           noteSave.exit().remove(); // enter
 
-           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;
+           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);
+           // }
 
-             if (!isZooming && !isPanning) {
-               return; // no change
-             } // lock in either zooming or panning, don't allow both in minimap.
+           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);
 
+           if (!commentTextarea.empty() && _newNote) {
+             // autofocus the comment field for new notes
+             commentTextarea.node().focus();
+           } // update
 
-             if (!_gesture) {
-               _gesture = isZooming ? 'zoom' : 'pan';
-             }
 
-             var tMini = projection.transform();
-             var tX, tY, scale;
+           noteSave = noteSaveEnter.merge(noteSave).call(userDetails).call(noteSaveButtons); // fast submit if user presses cmd+enter
 
-             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;
-             }
+           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
 
-             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();
+             window.setTimeout(function () {
+               if (_note.isNew()) {
+                 noteSave.selectAll('.save-button').node().focus();
+                 clickSave();
+               } else {
+                 noteSave.selectAll('.comment-button').node().focus();
+                 clickComment();
+               }
+             }, 10);
            }
 
-           function zoomEnded() {
-             if (_skipEvents) return;
-             if (_gesture !== 'pan') return;
-             updateProjection();
-             _gesture = null;
-             context.map().center(projection.invert(_cMini)); // recenter main map..
-           }
+           function changeInput() {
+             var input = select(this);
+             var val = input.property('value').trim() || undefined; // store the unsaved comment with the note itself
 
-           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();
+             _note = _note.update({
+               newComment: val
+             });
+             var osm = services.osm;
 
-             if (_isTransformed) {
-               utilSetTransform(tiles, 0, 0);
-               utilSetTransform(viewport, 0, 0);
-               _isTransformed = false;
+             if (osm) {
+               osm.replaceNote(_note); // update note cache
              }
 
-             zoom.scaleExtent([geoZoomToScale(0.5), geoZoomToScale(zMain - 3)]);
-             _skipEvents = true;
-             wrap.call(zoom.transform, _tCurr);
-             _skipEvents = false;
+             noteSave.call(noteSaveButtons);
            }
+         }
 
-           function redraw() {
-             clearTimeout(_timeoutID);
-             if (_isHidden) return;
-             updateProjection();
-             var zMini = geoScaleToZoom(projection.scale()); // setup tile container
+         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
 
-             tiles = wrap.selectAll('.map-in-map-tiles').data([0]);
-             tiles = tiles.enter().append('div').attr('class', 'map-in-map-tiles').merge(tiles); // redraw background
+           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'));
 
-             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
+             if (user.image_url) {
+               userLink.append('img').attr('src', user.image_url).attr('class', 'icon pre-text user-icon');
+             }
 
-             var overlaySources = context.background().overlayLayerSources();
-             var activeOverlayLayers = [];
+             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()
+             }));
+           });
+         }
 
-             for (var i = 0; i < overlaySources.length; i++) {
-               if (overlaySources[i].validZoom(zMini)) {
-                 if (!overlayLayers[i]) overlayLayers[i] = rendererTileLayer(context);
-                 activeOverlayLayers.push(overlayLayers[i].source(overlaySources[i]).projection(projection).dimensions(_dMini));
-               }
-             }
+         function noteSaveButtons(selection) {
+           var osm = services.osm;
+           var hasAuth = osm && osm.authenticated();
 
-             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
+           var isSelected = _note && _note.id === context.selectedNoteID();
 
-             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;
-               });
-             }
-           }
+           var buttonSection = selection.selectAll('.buttons').data(isSelected ? [_note] : [], function (d) {
+             return d.status + d.id;
+           }); // exit
 
-           function queueRedraw() {
-             clearTimeout(_timeoutID);
-             _timeoutID = setTimeout(function () {
-               redraw();
-             }, 750);
-           }
+           buttonSection.exit().remove(); // enter
 
-           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);
+           var buttonEnter = buttonSection.enter().append('div').attr('class', 'buttons');
 
-             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();
-               });
-             }
-           }
+           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
 
-           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..
 
-           _dMini = [200, 150]; //utilGetDimensions(wrap);
+           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);
 
-           _cMini = geoVecScale(_dMini, 0.5);
-           context.map().on('drawn.map-in-map', function (drawn) {
-             if (drawn.full === true) {
-               redraw();
-             }
-           });
-           redraw();
-           context.keybinding().on(_t('background.minimap.key'), toggle);
+           function isSaveDisabled(d) {
+             return hasAuth && d.status === 'open' && d.newComment ? null : true;
+           }
          }
 
-         return mapInMap;
-       }
+         function clickCancel(d3_event, d) {
+           this.blur(); // avoid keeping focus on the button - #4641
 
-       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'));
+           var osm = services.osm;
 
-           function disableTooHigh() {
-             var canEdit = context.map().zoom() >= context.minEditableZoom();
-             div.style('display', canEdit ? 'none' : 'block');
+           if (osm) {
+             osm.removeNote(d);
            }
 
-           context.map().on('move.notice', debounce(disableTooHigh, 500));
-           disableTooHigh();
-         };
-       }
+           context.enter(modeBrowse(context));
+           dispatch.call('change');
+         }
 
-       function uiPhotoviewer(context) {
-         var dispatch$1 = dispatch('resize');
+         function clickSave(d3_event, d) {
+           this.blur(); // avoid keeping focus on the button - #4641
 
-         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+           var osm = services.osm;
 
-         function photoviewer(selection) {
-           selection.append('button').attr('class', 'thumb-hide').on('click', function () {
-             if (services.streetside) {
-               services.streetside.hideViewer(context);
-             }
+           if (osm) {
+             osm.postNoteCreate(d, function (err, note) {
+               dispatch.call('change', note);
+             });
+           }
+         }
+
+         function clickStatus(d3_event, d) {
+           this.blur(); // avoid keeping focus on the button - #4641
+
+           var osm = services.osm;
+
+           if (osm) {
+             var setStatus = d.status === 'open' ? 'closed' : 'open';
+             osm.postNoteUpdate(d, setStatus, function (err, note) {
+               dispatch.call('change', note);
+             });
+           }
+         }
 
-             if (services.mapillary) {
-               services.mapillary.hideViewer(context);
-             }
+         function clickComment(d3_event, d) {
+           this.blur(); // avoid keeping focus on the button - #4641
 
-             if (services.openstreetcam) {
-               services.openstreetcam.hideViewer(context);
-             }
-           }).append('div').call(svgIcon('#iD-icon-close'));
+           var osm = services.osm;
 
-           function preventDefault(d3_event) {
-             d3_event.preventDefault();
+           if (osm) {
+             osm.postNoteUpdate(d, d.status, function (err, note) {
+               dispatch.call('change', note);
+             });
            }
+         }
 
-           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
-           }));
+         noteEditor.note = function (val) {
+           if (!arguments.length) return _note;
+           _note = val;
+           return noteEditor;
+         };
 
-           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;
+         noteEditor.newNote = function (val) {
+           if (!arguments.length) return _newNote;
+           _newNote = val;
+           return noteEditor;
+         };
 
-             function startResize(d3_event) {
-               if (pointerId !== (d3_event.pointerId || 'mouse')) return;
-               d3_event.preventDefault();
-               d3_event.stopPropagation();
-               var mapSize = context.map().dimensions();
+         return utilRebind(noteEditor, dispatch, 'on');
+       }
 
-               if (resizeOnX) {
-                 var maxWidth = mapSize[0];
-                 var newWidth = clamp(startWidth + d3_event.clientX - startX, minWidth, maxWidth);
-                 target.style('width', newWidth + 'px');
-               }
+       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);
 
-               if (resizeOnY) {
-                 var maxHeight = mapSize[1] - 90; // preserve space at top/bottom of map
+         var _current;
 
-                 var newHeight = clamp(startHeight + startY - d3_event.clientY, minHeight, maxHeight);
-                 target.style('height', newHeight + 'px');
-               }
+         var _wasData = false;
+         var _wasNote = false;
+         var _wasQaItem = false; // use pointer events on supported platforms; fallback to mouse events
 
-               dispatch.call(eventName, target, utilGetDimensions(target, true));
-             }
+         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-             function clamp(num, min, max) {
-               return Math.max(min, Math.min(num, max));
-             }
+         function sidebar(selection) {
+           var container = context.container();
+           var minWidth = 240;
+           var sidebarWidth;
+           var containerWidth;
+           var dragOffset; // Set the initial width constraints
 
-             function stopResize(d3_event) {
-               if (pointerId !== (d3_event.pointerId || 'mouse')) return;
-               d3_event.preventDefault();
-               d3_event.stopPropagation(); // remove all the listeners we added
+           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;
 
-               select(window).on('.' + eventName, null);
-             }
+           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
 
-             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);
+             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
 
-               if (_pointerPrefix === 'pointer') {
-                 select(window).on('pointercancel.' + eventName, stopResize, false);
-               }
-             };
+             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);
            }
-         }
 
-         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 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);
 
-           var photoDimensions = utilGetDimensions(photoviewer, true);
+             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 + '%');
 
-           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);
+               if (isCollapsed) {
+                 context.ui().onResize([-sidebarWidth * scaleX, 0]);
+               } else {
+                 context.ui().onResize([-dx * scaleX, 0]);
+               }
+             }
            }
-         };
 
-         return utilRebind(photoviewer, dispatch$1, 'on');
-       }
+           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);
+           }
 
-       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();
-         };
-       }
+           var featureListWrap = selection.append('div').attr('class', 'feature-list-pane').call(uiFeatureList(context));
+           var inspectorWrap = selection.append('div').attr('class', 'inspector-hidden inspector-wrap');
 
-       function uiScale(context) {
-         var projection = context.projection,
-             isImperial = !_mainLocalizer.usesMetric(),
-             maxLength = 180,
-             tickHeight = 8;
+           var hoverModeSelect = function hoverModeSelect(targets) {
+             context.container().selectAll('.feature-list-item button').classed('hover', false);
 
-         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;
+             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 (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
+               if (!elements.empty()) {
+                 elements.classed('hover', true);
+               }
+             }
+           };
 
+           sidebar.hoverModeSelect = throttle(hoverModeSelect, 200);
 
-           for (i = 0; i < buckets.length; i++) {
-             val = buckets[i];
+           function hover(targets) {
+             var datum = targets && targets.length && targets[0];
 
-             if (dist >= val) {
-               scale.dist = Math.floor(dist / val) * val;
-               break;
-             } else {
-               scale.dist = +dist.toFixed(2);
-             }
-           }
+             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;
 
-           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 (osm) {
+                 datum = osm.getNote(datum.id); // marker may contain stale data - get latest
+               }
 
-         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);
-         }
+               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];
 
-         return function (selection) {
-           function switchUnits() {
-             isImperial = !isImperial;
-             selection.call(update);
-           }
+               if (errService) {
+                 // marker may contain stale data - get latest
+                 datum = errService.getError(datum.id);
+               } // Currently only three possible services
 
-           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 uiShortcuts(context) {
-         var detected = utilDetect();
-         var _activeTab = 0;
+               var errEditor;
 
-         var _modalSelection;
+               if (datum.service === 'keepRight') {
+                 errEditor = keepRightEditor;
+               } else if (datum.service === 'osmose') {
+                 errEditor = osmoseEditor;
+               } else {
+                 errEditor = improveOsmEditor;
+               }
 
-         var _selection = select(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);
 
-         var _dataShortcuts;
+               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();
+             }
+           }
 
-         function shortcutsModal(_modalSelection) {
-           _modalSelection.select('.modal').classed('modal-shortcuts', true);
+           sidebar.hover = throttle(hover, 200);
 
-           var content = _modalSelection.select('.content');
+           sidebar.intersects = function (extent) {
+             var rect = selection.node().getBoundingClientRect();
+             return extent.intersects([context.projection.invert([0, rect.height]), context.projection.invert([rect.width, 0])]);
+           };
 
-           content.append('div').attr('class', 'modal-section').append('h3').html(_t.html('shortcuts.title'));
-           _mainFileFetcher.get('shortcuts').then(function (data) {
-             _dataShortcuts = data;
-             content.call(render);
-           })["catch"](function () {
-             /* ignore */
-           });
-         }
+           sidebar.select = function (ids, newFeature) {
+             sidebar.hide();
 
-         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 (ids && ids.length) {
+               var entity = ids.length === 1 && context.entity(ids[0]);
 
-             var i = _dataShortcuts.indexOf(d);
+               if (entity && newFeature && selection.classed('collapsed')) {
+                 // uncollapse the sidebar
+                 var extent = entity.extent(context.graph());
+                 sidebar.expand(sidebar.intersects(extent));
+               }
 
-             _activeTab = i;
-             render(selection);
-           });
-           tabsEnter.append('span').html(function (d) {
-             return _t.html(d.text);
-           }); // Update
+               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
 
-           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 [];
+               inspector.state('select').entityIDs(ids).newFeature(newFeature);
+               inspectorWrap.call(inspector);
              } else {
-               return d.modifiers;
+               inspector.state('hide');
              }
-           }).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;
+           };
 
-             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
+           sidebar.showPresetList = function () {
+             inspector.showList();
+           };
 
+           sidebar.show = function (component, element) {
+             featureListWrap.classed('inspector-hidden', true);
+             inspectorWrap.classed('inspector-hidden', true);
+             if (_current) _current.remove();
+             _current = selection.append('div').attr('class', 'sidebar-component').call(component, element);
+           };
 
-             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/);
+           sidebar.hide = function () {
+             featureListWrap.classed('inspector-hidden', false);
+             inspectorWrap.classed('inspector-hidden', true);
+             if (_current) _current.remove();
+             _current = null;
+           };
 
-             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;
-               });
+           sidebar.expand = function (moveMap) {
+             if (selection.classed('collapsed')) {
+               sidebar.toggle(moveMap);
              }
+           };
 
-             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);
+           sidebar.collapse = function (moveMap) {
+             if (!selection.classed('collapsed')) {
+               sidebar.toggle(moveMap);
              }
-           });
-           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';
-           });
-         }
+           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
 
-         return function (selection, show) {
-           _selection = selection;
+             selection.style('width', sidebarWidth + 'px');
+             var startMargin, endMargin, lastMargin;
+
+             if (isCollapsing) {
+               startMargin = lastMargin = 0;
+               endMargin = -sidebarWidth;
+             } else {
+               startMargin = lastMargin = -sidebarWidth;
+               endMargin = 0;
+             }
 
-           if (show) {
-             _modalSelection = uiModal(selection);
+             if (!isCollapsing) {
+               // unhide the sidebar's content before it transitions onscreen
+               selection.classed('collapsed', isCollapsing);
+             }
 
-             _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();
+             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 %
 
-                   _modalSelection = null;
-                 }
-               } else {
-                 _modalSelection = uiModal(_selection);
 
-                 _modalSelection.call(shortcutsModal);
+               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
 
-       var pair_1 = pair;
 
-       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
+           resizer.on('dblclick', function (d3_event) {
+             d3_event.preventDefault();
 
-         var matched = m[0]; // extract dimension.. m[1] = leading, m[5] = trailing
+             if (d3_event.sourceEvent) {
+               d3_event.sourceEvent.preventDefault();
+             }
 
-         var dim;
+             sidebar.toggle();
+           }); // ensure hover sidebar is closed when zooming out beyond editable zoom
 
-         if (m[1] && m[5]) {
-           // if matched both..
-           dim = m[1]; // keep leading
+           context.map().on('crossEditableZoom.sidebar', function (within) {
+             if (!within && !selection.select('.inspector-hover').empty()) {
+               hover([]);
+             }
+           });
+         }
 
-           matched = matched.slice(0, -1); // remove trailing dimension from match
-         } else {
-           dim = m[1] || m[5];
-         } // if unrecognized dimension
+         sidebar.showPresetList = function () {};
 
+         sidebar.hover = function () {};
 
-         if (dim && dims.indexOf(dim) === -1) return null; // extract DMS
+         sidebar.hover.cancel = function () {};
 
-         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)
-         };
-       }
+         sidebar.intersects = function () {};
 
-       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;
+         sidebar.select = function () {};
 
-         if (one.dim) {
-           return swapdim(one.val, two.val, one.dim);
-         } else {
-           return [one.val, two.val];
-         }
-       }
+         sidebar.show = function () {};
 
-       function swapdim(a, b, dim) {
-         if (dim === 'N' || dim === 'S') return [a, b];
-         if (dim === 'W' || dim === 'E') return [b, a];
+         sidebar.hide = function () {};
+
+         sidebar.expand = function () {};
+
+         sidebar.collapse = function () {};
+
+         sidebar.toggle = function () {};
+
+         return sidebar;
        }
 
-       function uiFeatureList(context) {
-         var _geocodeResults;
+       function uiSourceSwitch(context) {
+         var keys;
 
-         function featureList(selection) {
-           var header = selection.append('div').attr('class', 'header fillL');
-           header.append('h3').html(_t.html('inspector.feature_list'));
-           var searchWrap = selection.append('div').attr('class', 'search-header');
-           searchWrap.call(svgIcon('#iD-icon-search', 'pre-text'));
-           var search = searchWrap.append('input').attr('placeholder', _t('inspector.search')).attr('type', 'search').call(utilNoAuto).on('keypress', keypress).on('keydown', keydown).on('input', inputevent);
-           var listWrap = selection.append('div').attr('class', 'inspector-body');
-           var list = listWrap.append('div').attr('class', 'feature-list');
-           context.on('exit.feature-list', clearSearch);
-           context.map().on('drawn.feature-list', mapDrawn);
-           context.keybinding().on(uiCmd('⌘F'), focusSearch);
+         function 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
 
-           function focusSearch(d3_event) {
-             var mode = context.mode() && context.mode().id;
-             if (mode !== 'browse') return;
-             d3_event.preventDefault();
-             search.node().focus();
-           }
+           context.flush(); // remove stored data
 
-           function keydown(d3_event) {
-             if (d3_event.keyCode === 27) {
-               // escape
-               search.node().blur();
-             }
-           }
+           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)
+         }
 
-           function keypress(d3_event) {
-             var q = search.property('value'),
-                 items = list.selectAll('.feature-list-item');
+         var sourceSwitch = function sourceSwitch(selection) {
+           selection.append('a').attr('href', '#').html(_t.html('source_switch.live')).attr('class', 'live chip').on('click', click);
+         };
 
-             if (d3_event.keyCode === 13 && // ↩ Return
-             q.length && items.size()) {
-               click(items.datum());
-             }
-           }
+         sourceSwitch.keys = function (_) {
+           if (!arguments.length) return keys;
+           keys = _;
+           return sourceSwitch;
+         };
 
-           function inputevent() {
-             _geocodeResults = undefined;
-             drawList();
-           }
+         return sourceSwitch;
+       }
 
-           function clearSearch() {
-             search.property('value', '');
-             drawList();
-           }
+       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);
 
-           function mapDrawn(e) {
-             if (e.full) {
-               drawList();
-             }
+           if (osm) {
+             osm.on('loading.spinner', function () {
+               img.transition().style('opacity', 1);
+             }).on('loaded.spinner', function () {
+               img.transition().style('opacity', 0);
+             });
            }
+         };
+       }
 
-           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 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.
 
-             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
+           var updateMessage = '';
+           var sawPrivacyVersion = corePreferences('sawPrivacyVersion');
+           var showSplash = !corePreferences('sawSplash');
 
+           if (sawPrivacyVersion !== context.privacyVersion) {
+             updateMessage = _t('splash.privacy_update');
+             showSplash = true;
+           }
 
-             var idMatch = !locationMatch && q.match(/(?:^|\W)(node|way|relation|[nwr])\W?0*([1-9]\d*)(?:\W|$)/i);
+           if (!showSplash) return;
+           corePreferences('sawSplash', true);
+           corePreferences('sawPrivacyVersion', context.privacyVersion); // fetch intro graph data now, while user is looking at the splash screen
 
-             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
-               });
-             }
+           _mainFileFetcher.get('intro_graph');
+           var modalSelection = uiModal(selection);
+           modalSelection.select('.modal').attr('class', 'modal-splash modal');
+           var introModal = modalSelection.select('.content').append('div').attr('class', 'fillL');
+           introModal.append('div').attr('class', 'modal-section').append('h3').html(_t.html('splash.welcome'));
+           var modalSection = introModal.append('div').attr('class', 'modal-section');
+           modalSection.append('p').html(_t.html('splash.text', {
+             version: context.version,
+             website: '<a target="_blank" href="https://github.com/openstreetmap/iD/blob/develop/CHANGELOG.md#whats-new">changelog</a>',
+             github: '<a target="_blank" href="https://github.com/openstreetmap/iD/issues">github.com</a>'
+           }));
+           modalSection.append('p').html(_t.html('splash.privacy', {
+             updateMessage: updateMessage,
+             privacyLink: '<a target="_blank" href="https://github.com/openstreetmap/iD/blob/release/PRIVACY.md">' + _t('splash.privacy_policy') + '</a>'
+           }));
+           var buttonWrap = introModal.append('div').attr('class', 'modal-actions');
+           var walkthrough = buttonWrap.append('button').attr('class', 'walkthrough').on('click', function () {
+             context.container().call(uiIntro(context));
+             modalSelection.close();
+           });
+           walkthrough.append('svg').attr('class', 'logo logo-walkthrough').append('use').attr('xlink:href', '#iD-logo-walkthrough');
+           walkthrough.append('div').html(_t.html('splash.walkthrough'));
+           var startEditing = buttonWrap.append('button').attr('class', 'start-editing').on('click', modalSelection.close);
+           startEditing.append('svg').attr('class', 'logo logo-features').append('use').attr('xlink:href', '#iD-logo-features');
+           startEditing.append('div').html(_t.html('splash.start'));
+           modalSelection.select('button.close').attr('class', 'hide');
+         };
+       }
 
-             var allEntities = graph.entities;
-             var localResults = [];
+       function uiStatus(context) {
+         var osm = context.connection();
+         return function (selection) {
+           if (!osm) return;
 
-             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;
-             }
+           function update(err, apiStatus) {
+             selection.html('');
 
-             localResults = localResults.sort(function byDistance(a, b) {
-               return a.distance - b.distance;
-             });
-             result = result.concat(localResults);
+             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
 
-             (_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
-                 };
+                   osm.reloadApiStatus();
+                 }, 2000); // eslint-disable-next-line no-warning-comments
+                 // TODO: nice messages for different error types
 
-                 if (d.osm_type === 'way') {
-                   // for ways, add some fake closed nodes
-                   attrs.nodes = ['a', 'a']; // so that geometry area is possible
-                 }
 
-                 var tempEntity = osmEntity(attrs);
-                 var tempGraph = coreGraph([tempEntity]);
-                 var matched = _mainPresetIndex.match(tempEntity, tempGraph);
-                 var type = matched && matched.name() || utilDisplayType(id);
-                 result.push({
-                   id: tempEntity.id,
-                   geometry: tempEntity.geometry(tempGraph),
-                   type: type,
-                   name: d.display_name,
-                   extent: new geoExtent([parseFloat(d.boundingbox[3]), parseFloat(d.boundingbox[0])], [parseFloat(d.boundingbox[2]), parseFloat(d.boundingbox[1])])
+                 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();
                  });
                }
-             });
-
-             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
-               });
+             } else if (apiStatus === 'readonly') {
+               selection.html(_t.html('osm_api_status.message.readonly'));
+             } else if (apiStatus === 'offline') {
+               selection.html(_t.html('osm_api_status.message.offline'));
              }
 
-             return result;
+             selection.attr('class', 'api-status ' + (err ? 'error' : apiStatus));
            }
 
-           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'));
+           osm.on('apiStatusChange.uiStatus', update); // reload the status periodically regardless of other factors
 
-             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'));
-             }
+           window.setInterval(function () {
+             osm.reloadApiStatus();
+           }, 90000); // load the initial status in case no OSM data was loaded yet
 
-             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();
-           }
+           osm.reloadApiStatus();
+         };
+       }
 
-           function mouseover(d3_event, d) {
-             if (d.id === -1) return;
-             utilHighlightEntities([d.id], true, context);
-           }
+       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;
 
-           function mouseout(d3_event, d) {
-             if (d.id === -1) return;
-             utilHighlightEntities([d.id], false, context);
-           }
+         mode.enter = function () {
+           context.install(behavior);
+         };
 
-           function click(d3_event, d) {
-             d3_event.preventDefault();
+         mode.exit = function () {
+           context.uninstall(behavior);
+         };
 
-             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);
-             }
-           }
+         mode.selectedIDs = function () {
+           return [wayID];
+         };
 
-           function geocoderSearch() {
-             services.geocoder.search(search.property('value'), function (err, resp) {
-               _geocodeResults = resp || [];
-               drawList();
-             });
-           }
-         }
+         mode.activeID = function () {
+           return behavior && behavior.activeID() || [];
+         };
 
-         return featureList;
+         return mode;
        }
 
-       function uiSectionEntityIssues(context) {
-         var _entityIDs = [];
-         var _issues = [];
+       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');
 
-         var _activeIssueID;
+         function actionClose(wayId) {
+           return function (graph) {
+             return graph.replace(graph.entity(wayId).close());
+           };
+         }
 
-         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
+         function start(loc) {
+           var startGraph = context.graph();
+           var node = osmNode({
+             loc: loc
            });
-         }).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);
-         });
+           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 reloadIssues() {
-           _issues = context.validator().getSharedEntityIssues(_entityIDs, {
-             includeDisabledRules: true
+         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));
          }
 
-         function makeActiveIssue(issueID) {
-           _activeIssueID = issueID;
-           section.selection().selectAll('.issue-container').classed('active', function (d) {
-             return d.id === _activeIssueID;
+         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));
          }
 
-         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
+         mode.enter = function () {
+           context.install(behavior);
+         };
 
-           containers.exit().remove(); // Enter
+         mode.exit = function () {
+           context.uninstall(behavior);
+         };
 
-           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
+         return mode;
+       }
 
-             var extent = d.extent(context.graph());
+       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');
 
-             if (extent) {
-               var setZoom = Math.max(context.map().zoom(), 19);
-               context.map().unobscuredCenterZoomEase(extent.center(), setZoom);
-             }
+         function start(loc) {
+           var startGraph = context.graph();
+           var node = osmNode({
+             loc: loc
            });
-           textEnter.each(function (d) {
-             var iconName = '#iD-icon-' + (d.severity === 'warning' ? 'alert' : 'error');
-             select(this).call(svgIcon(iconName, 'issue-icon'));
+           var way = osmWay({
+             tags: defaultTags
            });
-           textEnter.append('span').attr('class', 'issue-message');
-           var infoButton = labelsEnter.append('button').attr('class', 'issue-info-button').attr('title', _t('icons.information')).call(svgIcon('#iD-icon-inspect'));
-           infoButton.on('click', function (d3_event) {
-             d3_event.stopPropagation();
-             d3_event.preventDefault();
-             this.blur(); // avoid keeping focus on the button - #4641
-
-             var container = select(this.parentNode.parentNode.parentNode);
-             var info = container.selectAll('.issue-info');
-             var isExpanded = info.classed('expanded');
+           context.perform(actionAddEntity(node), actionAddEntity(way), actionAddVertex(way.id, node.id));
+           context.enter(modeDrawLine(context, way.id, startGraph, mode.button));
+         }
 
-             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);
-               });
-             }
+         function startFromWay(loc, edge) {
+           var startGraph = context.graph();
+           var node = osmNode({
+             loc: loc
            });
-           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;
+           var way = osmWay({
+             tags: defaultTags
            });
-           containers.selectAll('.issue-message').html(function (d) {
-             return d.message(context);
-           }); // fixes
+           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));
+         }
 
-           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;
+         function startFromNode(node) {
+           var startGraph = context.graph();
+           var way = osmWay({
+             tags: defaultTags
            });
-           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)
+           context.perform(actionAddEntity(way), actionAddVertex(way.id, node.id));
+           context.enter(modeDrawLine(context, way.id, startGraph, mode.button));
+         }
 
-             if (d.issue.dateLastRanFix && new Date() - d.issue.dateLastRanFix < 1000) return;
-             d.issue.dateLastRanFix = new Date(); // remove hover-highlighting
+         mode.enter = function () {
+           context.install(behavior);
+         };
 
-             utilHighlightEntities(d.issue.entityIds.concat(d.entityIds), false, context);
-             new Promise(function (resolve, reject) {
-               d.onClick(context, resolve, reject);
+         mode.exit = function () {
+           context.uninstall(behavior);
+         };
 
-               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';
+         return mode;
+       }
 
-             if (iconName.startsWith('maki')) {
-               iconName += '-15';
-             }
+       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');
 
-             select(this).call(svgIcon('#' + iconName, 'fix-icon'));
-           });
-           buttons.append('span').attr('class', 'fix-message').html(function (d) {
-             return d.title;
+         function add(loc) {
+           var node = osmNode({
+             loc: loc,
+             tags: defaultTags
            });
-           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;
-             }
+           context.perform(actionAddEntity(node), _t('operations.add.annotation.point'));
+           enterSelectMode(node);
+         }
 
-             return null;
+         function addWay(loc, edge) {
+           var node = osmNode({
+             tags: defaultTags
            });
+           context.perform(actionAddMidpoint({
+             loc: loc,
+             edge: edge
+           }, node), _t('operations.add.annotation.vertex'));
+           enterSelectMode(node);
          }
 
-         section.entityIDs = function (val) {
-           if (!arguments.length) return _entityIDs;
+         function enterSelectMode(node) {
+           context.enter(modeSelect(context, [node.id]).newFeature(true));
+         }
 
-           if (!_entityIDs || !val || !utilArrayIdentical(_entityIDs, val)) {
-             _entityIDs = val;
-             _activeIssueID = null;
-             reloadIssues();
+         function addNode(node) {
+           if (Object.keys(defaultTags).length === 0) {
+             enterSelectMode(node);
+             return;
            }
 
-           return section;
+           var tags = Object.assign({}, node.tags); // shallow copy
+
+           for (var key in defaultTags) {
+             tags[key] = defaultTags[key];
+           }
+
+           context.perform(actionChangeTags(node.id, tags), _t('operations.add.annotation.point'));
+           enterSelectMode(node);
+         }
+
+         function cancel() {
+           context.enter(modeBrowse(context));
+         }
+
+         mode.enter = function () {
+           context.install(behavior);
          };
 
-         return section;
+         mode.exit = function () {
+           context.uninstall(behavior);
+         };
+
+         return mode;
        }
 
-       function uiPresetIcon() {
-         var _preset;
+       function modeSelectNote(context, selectedNoteID) {
+         var mode = {
+           id: 'select-note',
+           button: 'browse'
+         };
 
-         var _geometry;
+         var _keybinding = utilKeybinding('select-note');
 
-         var _sizeClass = 'medium';
+         var _noteEditor = uiNoteEditor(context).on('change', function () {
+           context.map().pan([0, 0]); // trigger a redraw
 
-         function isSmall() {
-           return _sizeClass === 'small';
-         }
+           var note = checkSelectedID();
+           if (!note) return;
+           context.ui().sidebar.show(_noteEditor.note(note));
+         });
 
-         function presetIcon(selection) {
-           selection.each(render);
-         }
+         var _behaviors = [behaviorBreathe(), behaviorHover(context), behaviorSelect(context), behaviorLasso(context), modeDragNode(context).behavior, modeDragNote(context).behavior];
+         var _newFeature = false;
 
-         function getIcon(p, geom) {
-           if (isSmall() && p.isFallback && p.isFallback()) return 'iD-icon-' + p.id;else if (p.icon) return p.icon;else if (geom === 'line') return 'iD-other-line';else if (geom === 'vertex') return p.isFallback() ? '' : 'temaki-vertex';else if (isSmall() && geom === 'point') return '';else return 'maki-marker-stroked';
-         }
+         function checkSelectedID() {
+           if (!services.osm) return;
+           var note = services.osm.getNote(selectedNoteID);
 
-         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);
-         }
+           if (!note) {
+             context.enter(modeBrowse(context));
+           }
 
-         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);
-         }
+           return note;
+         } // class the note as selected, or return to browse mode if the note is gone
 
-         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);
-           });
 
-           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 selectNote(d3_event, drawn) {
+           if (!checkSelectedID()) return;
+           var selection = context.surface().selectAll('.layer-notes .note-' + selectedNoteID);
+
+           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);
            }
+         }
 
-           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 esc() {
+           if (context.container().select('.combobox').size()) return;
+           context.enter(modeBrowse(context));
          }
 
-         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
+         mode.zoomToSelected = function () {
+           if (!services.osm) return;
+           var note = services.osm.getNote(selectedNoteID);
 
-           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));
-           });
-           [[x1 - 1, y], [x2 + 1, y]].forEach(function (point) {
-             lineEnter.append('circle').attr('class', 'vertex').attr('cx', point[0]).attr('cy', point[1]).attr('r', r);
-           });
-           line = lineEnter.merge(line);
-           line.selectAll('path.stroke').attr('class', "line stroke ".concat(tagClasses));
-           line.selectAll('path.casing').attr('class', "line casing ".concat(tagClasses));
-         }
+           if (note) {
+             context.map().centerZoomEase(note.loc, 20);
+           }
+         };
 
-         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
+         mode.newFeature = function (val) {
+           if (!arguments.length) return _newFeature;
+           _newFeature = val;
+           return mode;
+         };
 
-           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);
+         mode.enter = function () {
+           var note = checkSelectedID();
+           if (!note) return;
 
-           if (drawRoute) {
-             var routeType = p.tags.type === 'waterway' ? 'waterway' : p.tags.route;
-             var segmentPresetIDs = routeSegments[routeType];
+           _behaviors.forEach(context.install);
 
-             for (var i in segmentPresetIDs) {
-               var segmentPreset = _mainPresetIndex.item(segmentPresetIDs[i]);
-               var segmentTagClasses = svgTagClasses().getClassesString(segmentPreset.tags, '');
-               route.selectAll("path.stroke.segment".concat(i)).attr('class', "segment".concat(i, " line stroke ").concat(segmentTagClasses));
-               route.selectAll("path.casing.segment".concat(i)).attr('class', "segment".concat(i, " line casing ").concat(segmentTagClasses));
-             }
-           }
-         } // Route icons are drawn with a zigzag annotation underneath:
-         //     o   o
-         //    / \ /
-         //   o   o
-         // This dataset defines the styles that are used to draw the zigzag segments.
+           _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
 
-         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']
+           sidebar.expand(sidebar.intersects(note.extent()));
+           context.map().on('drawn.select', selectNote);
          };
 
-         function render() {
-           var p = _preset.apply(this, arguments);
+         mode.exit = function () {
+           _behaviors.forEach(context.uninstall);
 
-           var geom = _geometry ? _geometry.apply(this, arguments) : 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);
+         };
 
-           if (geom === 'relation' && p.tags && (p.tags.type === 'route' && p.tags.route && routeSegments[p.tags.route] || p.tags.type === 'waterway')) {
-             geom = 'route';
-           }
+         return mode;
+       }
 
-           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) : {};
+       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);
 
-           for (var k in tags) {
-             if (tags[k] === '*') {
-               tags[k] = 'yes';
-             }
-           }
+         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)
 
-           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);
+           context.map().pan([0, 0]);
+           context.selectedNoteID(note.id).enter(modeSelectNote(context, note.id).newFeature(true));
          }
 
-         presetIcon.preset = function (val) {
-           if (!arguments.length) return _preset;
-           _preset = utilFunctor(val);
-           return presetIcon;
-         };
+         function cancel() {
+           context.enter(modeBrowse(context));
+         }
 
-         presetIcon.geometry = function (val) {
-           if (!arguments.length) return _geometry;
-           _geometry = utilFunctor(val);
-           return presetIcon;
+         mode.enter = function () {
+           context.install(behavior);
          };
 
-         presetIcon.sizeClass = function (val) {
-           if (!arguments.length) return _sizeClass;
-           _sizeClass = val;
-           return presetIcon;
+         mode.exit = function () {
+           context.uninstall(behavior);
          };
 
-         return presetIcon;
+         return mode;
        }
 
-       function uiSectionFeatureType(context) {
-         var dispatch$1 = dispatch('choose');
-         var _entityIDs = [];
-         var _presets = [];
-
-         var _tagReference;
-
-         var section = uiSection('feature-type', context).label(_t.html('inspector.feature_type')).disclosureContent(renderDisclosureContent);
+       var JXON = new function () {
+         var sValueProp = 'keyValue',
+             sAttributesProp = 'keyAttributes',
+             sAttrPref = '@',
 
-         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
+         /* you can customize these values */
+         aCache = [],
+             rIsNull = /^\s*$/,
+             rIsBool = /^(?:true|false)$/i;
 
-           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);
+         function parseText(sValue) {
+           if (rIsNull.test(sValue)) {
+             return null;
            }
 
-           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) {
-             return d;
-           });
-         }
-
-         section.entityIDs = function (val) {
-           if (!arguments.length) return _entityIDs;
-           _entityIDs = val;
-           return section;
-         };
-
-         section.presets = function (val) {
-           if (!arguments.length) return _presets; // don't reload the same preset
-
-           if (!utilArrayIdentical(val, _presets)) {
-             _presets = val;
-
-             if (_presets.length === 1) {
-               _tagReference = uiTagReference(_presets[0].reference()).showing(false);
-             }
+           if (rIsBool.test(sValue)) {
+             return sValue.toLowerCase() === 'true';
            }
 
-           return section;
-         };
-
-         function entityGeometries() {
-           var counts = {};
+           if (isFinite(sValue)) {
+             return parseFloat(sValue);
+           }
 
-           for (var i in _entityIDs) {
-             var geometry = context.graph().geometry(_entityIDs[i]);
-             if (!counts[geometry]) counts[geometry] = 0;
-             counts[geometry] += 1;
+           if (isFinite(Date.parse(sValue))) {
+             return new Date(sValue);
            }
 
-           return Object.keys(counts).sort(function (geom1, geom2) {
-             return counts[geom2] - counts[geom1];
-           });
+           return sValue;
          }
 
-         return utilRebind(section, dispatch$1, 'on');
-       }
-
-       // It borrows some code from uiHelp
+         function EmptyTree() {}
 
-       function uiFieldHelp(context, fieldName) {
-         var fieldHelp = {};
+         EmptyTree.prototype.toString = function () {
+           return 'null';
+         };
 
-         var _inspector = select(null);
+         EmptyTree.prototype.valueOf = function () {
+           return null;
+         };
 
-         var _wrap = select(null);
+         function objectify(vValue) {
+           return vValue === null ? new EmptyTree() : vValue instanceof Object ? vValue : new vValue.constructor(vValue);
+         }
 
-         var _body = select(null);
+         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 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 (bChildren) {
+             for (var oNode, nItem = 0; nItem < oParentNode.childNodes.length; nItem++) {
+               oNode = oParentNode.childNodes.item(nItem);
 
-         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?
+               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 hhh = depth ? Array(depth + 1).join('#') + ' ' : ''; // if so, prepend with some ##'s
+           var nLevelEnd = aCache.length,
+               vBuiltVal = parseText(sCollectedTxt);
 
-             return all + hhh + _t.html(subkey, replacements) + '\n\n';
-           }, '');
-           return {
-             key: helpkey,
-             title: _t.html(helpkey + '.title'),
-             html: marked_1(text.trim())
-           };
-         });
+           if (!bHighVerb && (bChildren || bAttributes)) {
+             vResult = nVerb === 0 ? objectify(vBuiltVal) : {};
+           }
 
-         function show() {
-           updatePosition();
+           for (var nElId = nLevelStart; nElId < nLevelEnd; nElId++) {
+             sProp = aCache[nElId].nodeName.toLowerCase();
+             vContent = createObjTree(aCache[nElId], nVerb, bFreeze, bNesteAttr);
 
-           _body.classed('hide', false).style('opacity', '0').transition().duration(200).style('opacity', '1');
-         }
+             if (vResult.hasOwnProperty(sProp)) {
+               if (vResult[sProp].constructor !== Array) {
+                 vResult[sProp] = [vResult[sProp]];
+               }
 
-         function hide() {
-           _body.classed('hide', true).transition().duration(200).style('opacity', '0').on('end', function () {
-             _body.classed('hide', true);
-           });
-         }
+               vResult[sProp].push(vContent);
+             } else {
+               vResult[sProp] = vContent;
+               nLength++;
+             }
+           }
 
-         function clickHelp(index) {
-           var d = docs[index];
-           var tkeys = fieldHelpKeys[fieldName][index][1];
+           if (bAttributes) {
+             var nAttrLen = oParentNode.attributes.length,
+                 sAPrefix = bNesteAttr ? '' : sAttrPref,
+                 oAttrParent = bNesteAttr ? {} : vResult;
 
-           _body.selectAll('.field-help-nav-item').classed('active', function (d, i) {
-             return i === index;
-           });
+             for (var oAttrib, nAttrib = 0; nAttrib < nAttrLen; nLength++, nAttrib++) {
+               oAttrib = oParentNode.attributes.item(nAttrib);
+               oAttrParent[sAPrefix + oAttrib.name.toLowerCase()] = parseText(oAttrib.value.trim());
+             }
 
-           var content = _body.selectAll('.field-help-content').html(d.html); // class the paragraphs so we can find and style them
+             if (bNesteAttr) {
+               if (bFreeze) {
+                 Object.freeze(oAttrParent);
+               }
 
+               vResult[sAttributesProp] = oAttrParent;
+               nLength -= nAttrLen - 1;
+             }
+           }
 
-           content.selectAll('p').attr('class', function (d, i) {
-             return tkeys[i];
-           }); // insert special content for certain help sections
+           if (nVerb === 3 || (nVerb === 2 || nVerb === 1 && nLength > 0) && sCollectedTxt) {
+             vResult[sValueProp] = vBuiltVal;
+           } else if (!bHighVerb && nLength === 0 && sCollectedTxt) {
+             vResult = vBuiltVal;
+           }
 
-           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'));
+           if (bFreeze && (bHighVerb || nLength > 0)) {
+             Object.freeze(vResult);
            }
+
+           aCache.length = nLevelStart;
+           return vResult;
          }
 
-         fieldHelp.button = function (selection) {
-           if (_body.empty()) return;
-           var button = selection.selectAll('.field-help-button').data([0]); // enter/update
+         function loadObjTree(oXMLDoc, oParentEl, oParentObj) {
+           var vValue, oChild;
 
-           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();
+           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()));
+           }
 
-             if (_body.classed('hide')) {
-               show();
-             } else {
-               hide();
+           for (var sName in oParentObj) {
+             vValue = oParentObj[sName];
+
+             if (isFinite(sName) || vValue instanceof Function) {
+               continue;
              }
-           });
-         };
+             /* verbosity level is 0 */
 
-         function updatePosition() {
-           var wrap = _wrap.node();
 
-           var inspector = _inspector.node();
+             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);
 
-           var wRect = wrap.getBoundingClientRect();
-           var iRect = inspector.getBoundingClientRect();
+               if (vValue instanceof Object) {
+                 loadObjTree(oXMLDoc, oChild, vValue);
+               } else if (vValue !== null && vValue !== true) {
+                 oChild.appendChild(oXMLDoc.createTextNode(vValue.toString()));
+               }
 
-           _body.style('top', wRect.top + inspector.scrollTop - iRect.top + 'px');
+               oParentEl.appendChild(oChild);
+             }
+           }
          }
 
-         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
-
-           _inspector = context.container().select('.sidebar .entity-editor-pane .inspector-body');
-           if (_inspector.empty()) return;
-           _body = _inspector.selectAll('.field-help-body').data([0]);
-
-           var enter = _body.enter().append('div').attr('class', 'field-help-body hide'); // initially hidden
+         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);
+         };
 
-           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);
+         this.unbuild = function (oObjTree) {
+           var oNewDoc = document.implementation.createDocument('', '', null);
+           loadObjTree(oNewDoc, oNewDoc, oObjTree);
+           return oNewDoc;
          };
 
-         return fieldHelp;
-       }
+         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 uiFieldCheck(field, context) {
-         var dispatch$1 = dispatch('change');
-         var options = field.strings && field.strings.options;
-         var values = [];
-         var texts = [];
+       function uiConflicts(context) {
+         var dispatch = dispatch$8('cancel', 'save');
+         var keybinding = utilKeybinding('conflicts');
 
-         var _tags;
+         var _origChanges;
 
-         var input = select(null);
-         var text = select(null);
-         var label = select(null);
-         var reverser = select(null);
+         var _conflictList;
 
-         var _impliedYes;
+         var _shownConflictIndex;
 
-         var _entityIDs = [];
+         function keybindingOn() {
+           select(document).call(keybinding.on('⎋', cancel, true));
+         }
 
-         var _value;
+         function keybindingOff() {
+           select(document).call(keybinding.unbind);
+         }
 
-         if (options) {
-           for (var k in options) {
-             values.push(k === 'undefined' ? undefined : k);
-             texts.push(field.t.html('options.' + k, {
-               'default': options[k]
-             }));
-           }
-         } else {
-           values = [undefined, 'yes'];
-           texts = [_t.html('inspector.unknown'), _t.html('inspector.check.yes')];
+         function tryAgain() {
+           keybindingOff();
+           dispatch.call('save');
+         }
 
-           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 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').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
 
-         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
+           var detected = utilDetect();
+           var changeset = new osmChangeset();
+           delete changeset.id; // Export without changeset_id
 
-           if (field.id === 'oneway') {
-             var entity = context.entity(_entityIDs[0]);
+           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');
 
-             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;
-               }
-             }
+           if (detected.download) {
+             // All except IE11 and Edge
+             linkEnter // download the data as a file
+             .attr('href', window.URL.createObjectURL(blob)).attr('download', fileName);
+           } else {
+             // IE11 and Edge
+             linkEnter // open data uri in a new tab
+             .attr('target', '_blank').on('click.download', function () {
+               navigator.msSaveBlob(blob, fileName);
+             });
            }
-         }
-
-         function reverserHidden() {
-           if (!context.container().select('div.inspector-hover').empty()) return true;
-           return !(_value === 'yes' || _impliedYes && !_value);
-         }
 
-         function reverserSetText(selection) {
-           var entity = _entityIDs.length && context.hasEntity(_entityIDs[0]);
-           if (reverserHidden() || !entity) return selection;
-           var first = entity.first();
-           var last = entity.isClosed() ? entity.nodes[entity.nodes.length - 2] : entity.last();
-           var pseudoDirection = first < last;
-           var icon = pseudoDirection ? '#iD-icon-forward' : '#iD-icon-backward';
-           selection.selectAll('.reverser-span').html(_t.html('inspector.check.reverser')).call(svgIcon(icon, 'inline'));
-           return selection;
+           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);
          }
 
-         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');
+         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 (field.type === 'onewayCheck') {
-             enter.append('button').attr('class', 'reverser' + (reverserHidden() ? ' hide' : '')).append('span').attr('class', 'reverser-span');
+           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);
            }
 
-           label = label.merge(enter);
-           input = label.selectAll('input');
-           text = label.selectAll('span.value');
-           input.on('click', function (d3_event) {
-             d3_event.stopPropagation();
-             var t = {};
+           var conflict = selection.selectAll('.conflict').data([_conflictList[index]]);
+           conflict.exit().remove();
+           var conflictEnter = conflict.enter().append('div').attr('class', 'conflict');
+           conflictEnter.append('h4').attr('class', 'conflict-count').html(_t.html('save.conflict.count', {
+             num: index + 1,
+             total: _conflictList.length
+           }));
+           conflictEnter.append('a').attr('class', 'conflict-description').attr('href', '#').html(function (d) {
+             return d.name;
+           }).on('click', function (d3_event, d) {
+             d3_event.preventDefault();
+             zoomToEntity(d.id);
+           });
+           var details = conflictEnter.append('div').attr('class', 'conflict-detail-container');
+           details.append('ul').attr('class', 'conflict-detail-list').selectAll('li').data(function (d) {
+             return d.details || [];
+           }).enter().append('li').attr('class', 'conflict-detail-item').html(function (d) {
+             return d;
+           });
+           details.append('div').attr('class', 'conflict-choices').call(addChoices);
+           details.append('div').attr('class', 'conflict-nav-buttons joined cf').selectAll('button').data(['previous', 'next']).enter().append('button').html(function (d) {
+             return _t.html('save.conflict.' + d);
+           }).attr('class', 'conflict-nav-button action col6').attr('disabled', function (d, i) {
+             return i === 0 && index === 0 || i === 1 && index === _conflictList.length - 1 || null;
+           }).on('click', function (d3_event, d) {
+             d3_event.preventDefault();
+             var container = parent.selectAll('.conflict-container');
+             var sign = d === 'previous' ? -1 : 1;
+             container.selectAll('.conflict').remove();
+             container.call(showConflict, index + sign);
+           });
+         }
+
+         function addChoices(selection) {
+           var choices = selection.append('ul').attr('class', 'layer-list').selectAll('li').data(function (d) {
+             return d.choices || [];
+           }); // enter
 
-             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 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
 
+           choicesEnter.merge(choices).each(function (d) {
+             var ul = this.parentNode;
 
-             if (t[field.key] === 'reversible' || t[field.key] === 'alternating') {
-               t[field.key] = values[0];
+             if (ul.__data__.chosen === d.id) {
+               choose(null, ul, d);
              }
+           });
+         }
 
-             dispatch$1.call('change', this, t);
+         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 (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);
-                 }
+         function zoomToEntity(id, extent) {
+           context.surface().selectAll('.hover').classed('hover', false);
+           var entity = context.graph().hasEntity(id);
 
-                 return graph;
-               }, _t('operations.reverse.annotation.line', {
-                 n: 1
-               })); // must manually revalidate since no 'change' event was called
+           if (entity) {
+             if (extent) {
+               context.map().trimmedExtent(extent);
+             } else {
+               context.map().zoomToEase(entity);
+             }
 
-               context.validator().validate();
-               select(this).call(reverserSetText);
-             });
+             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)
+         //     ]
+         // }
 
-         check.entityIDs = function (val) {
-           if (!arguments.length) return _entityIDs;
-           _entityIDs = val;
-           return check;
-         };
 
-         check.tags = function (tags) {
-           _tags = tags;
+         conflicts.conflictList = function (_) {
+           if (!arguments.length) return _conflictList;
+           _conflictList = _;
+           return conflicts;
+         };
 
-           function isChecked(val) {
-             return val !== 'no' && val !== '' && val !== undefined && val !== null;
-           }
+         conflicts.origChanges = function (_) {
+           if (!arguments.length) return _origChanges;
+           _origChanges = _;
+           return conflicts;
+         };
 
-           function textFor(val) {
-             if (val === '') val = undefined;
-             var index = values.indexOf(val);
-             return index !== -1 ? texts[index] : '"' + val + '"';
+         conflicts.shownEntityIds = function () {
+           if (_conflictList && typeof _shownConflictIndex === 'number') {
+             return [_conflictList[_shownConflictIndex].id];
            }
 
-           checkImpliedYes();
-           var isMixed = Array.isArray(tags[field.key]);
-           _value = !isMixed && tags[field.key] && tags[field.key].toLowerCase();
-
-           if (field.type === 'onewayCheck' && (_value === '1' || _value === '-1')) {
-             _value = 'yes';
-           }
+           return [];
+         };
 
-           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);
+         return utilRebind(conflicts, dispatch, 'on');
+       }
 
-           if (field.type === 'onewayCheck') {
-             reverser.classed('hide', reverserHidden()).call(reverserSetText);
-           }
-         };
+       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');
 
-         check.focus = function () {
-           input.node().focus();
+         modalSelection.okButton = function () {
+           buttons.append('button').attr('class', 'button ok-button action').on('click.confirm', function () {
+             modalSelection.remove();
+           }).html(_t.html('confirm.okay')).node().focus();
+           return modalSelection;
          };
 
-         return utilRebind(check, dispatch$1, 'on');
+         return modalSelection;
        }
 
-       function uiFieldCombo(field, context) {
-         var dispatch$1 = dispatch('change');
+       function uiChangesetEditor(context) {
+         var dispatch = dispatch$8('change');
+         var formFields = uiFormFields(context);
+         var commentCombo = uiCombobox(context, 'comment').caseSensitive(true);
 
-         var _isMulti = field.type === 'multiCombo' || field.type === 'manyCombo';
+         var _fieldsArr;
 
-         var _isNetwork = field.type === 'networkCombo';
+         var _tags;
 
-         var _isSemi = field.type === 'semiCombo';
+         var _changesetID;
 
-         var _optstrings = field.strings && field.strings.options;
+         function changesetEditor(selection) {
+           render(selection);
+         }
 
-         var _optarray = field.options;
+         function render(selection) {
+           var initial = false;
 
-         var _snake_case = field.snake_case || field.snake_case === undefined;
+           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
+             })];
 
-         var _combobox = uiCombobox(context, 'combo-' + field.safeid).caseSensitive(field.caseSensitive).minItems(_isMulti || _isSemi ? 1 : 2);
+             _fieldsArr.forEach(function (field) {
+               field.on('change', function (t, onInput) {
+                 dispatch.call('change', field, undefined, t, onInput);
+               });
+             });
+           }
 
-         var _container = select(null);
+           _fieldsArr.forEach(function (field) {
+             field.tags(_tags);
+           });
 
-         var _inputWrap = select(null);
+           selection.call(formFields.fieldsArr(_fieldsArr));
 
-         var _input = select(null);
+           if (initial) {
+             var commentField = selection.select('.form-field-comment textarea');
+             var commentNode = commentField.node();
 
-         var _comboData = [];
-         var _multiData = [];
-         var _entityIDs = [];
+             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
 
-         var _tags;
 
-         var _countryCode;
+             utilTriggerEvent(commentField, 'blur');
+             var osm = context.connection();
 
-         var _staticPlaceholder; // initialize deprecated tags array
+             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
 
 
-         var _dataDeprecated = [];
-         _mainFileFetcher.get('deprecated').then(function (d) {
-           _dataDeprecated = d;
-         })["catch"](function () {
-           /* ignore */
-         }); // ensure multiCombo field.key ends with a ':'
+           var hasGoogle = _tags.comment.match(/google/i);
 
-         if (_isMulti && field.key && /[^:]$/.test(field.key)) {
-           field.key += ':';
+           var commentWarning = selection.select('.form-field-comment').selectAll('.comment-warning').data(hasGoogle ? [0] : []);
+           commentWarning.exit().transition().duration(200).style('opacity', 0).remove();
+           var commentEnter = commentWarning.enter().insert('div', '.tag-reference-body').attr('class', 'field-warning comment-warning').style('opacity', 0);
+           commentEnter.append('a').attr('target', '_blank').call(svgIcon('#iD-icon-alert', 'inline')).attr('href', _t('commit.google_warning_link')).append('span').html(_t.html('commit.google_warning'));
+           commentEnter.transition().duration(200).style('opacity', 1);
          }
 
-         function snake(s) {
-           return s.replace(/\s+/g, '_');
-         }
+         changesetEditor.tags = function (_) {
+           if (!arguments.length) return _tags;
+           _tags = _; // Don't reset _fieldsArr here.
 
-         function unsnake(s) {
-           return s.replace(/_+/g, ' ');
-         }
+           return changesetEditor;
+         };
 
-         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)
+         changesetEditor.changesetID = function (_) {
+           if (!arguments.length) return _changesetID;
+           if (_changesetID === _) return changesetEditor;
+           _changesetID = _;
+           _fieldsArr = null;
+           return changesetEditor;
+         };
 
+         return utilRebind(changesetEditor, dispatch, 'on');
+       }
 
-         function tagValue(dval) {
-           dval = clean(dval || '');
+       function uiSectionChanges(context) {
+         var detected = utilDetect();
+         var _discardTags = {};
+         _mainFileFetcher.get('discarded').then(function (d) {
+           _discardTags = d;
+         })["catch"](function () {
+           /* ignore */
+         });
+         var section = uiSection('changes-list', context).label(function () {
+           var history = context.history();
+           var summary = history.difference().summary();
+           return _t('inspector.title_count', {
+             title: _t.html('commit.changes'),
+             count: summary.length
+           });
+         }).disclosureContent(renderDisclosureContent);
 
-           if (_optstrings) {
-             var found = _comboData.find(function (o) {
-               return o.key && clean(o.value) === dval;
-             });
+         function renderDisclosureContent(selection) {
+           var history = context.history();
+           var summary = history.difference().summary();
+           var container = selection.selectAll('.commit-section').data([0]);
+           var containerEnter = container.enter().append('div').attr('class', 'commit-section');
+           containerEnter.append('ul').attr('class', 'changeset-list');
+           container = containerEnter.merge(container);
+           var items = container.select('ul').selectAll('li').data(summary);
+           var itemsEnter = items.enter().append('li').attr('class', 'change-item');
+           var buttons = itemsEnter.append('button').on('mouseover', mouseover).on('mouseout', mouseout).on('click', click);
+           buttons.each(function (d) {
+             select(this).call(svgIcon('#iD-icon-' + d.entity.geometry(d.graph), 'pre-text ' + d.changeType));
+           });
+           buttons.append('span').attr('class', 'change-type').html(function (d) {
+             return _t.html('commit.' + d.changeType) + ' ';
+           });
+           buttons.append('strong').attr('class', 'entity-type').html(function (d) {
+             var matched = _mainPresetIndex.match(d.entity, d.graph);
+             return matched && matched.name() || utilDisplayType(d.entity.id);
+           });
+           buttons.append('span').attr('class', 'entity-name').html(function (d) {
+             var name = utilDisplayName(d.entity) || '',
+                 string = '';
 
-             if (found) {
-               return found.key;
+             if (name !== '') {
+               string += ':';
              }
-           }
-
-           if (field.type === 'typeCombo' && !dval) {
-             return 'yes';
-           }
 
-           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)
+             return string += ' ' + name;
+           });
+           items = itemsEnter.merge(items); // Download changeset link
 
+           var changeset = new osmChangeset().update({
+             id: undefined
+           });
+           var changes = history.changes(actionDiscardTags(history.difference(), _discardTags));
+           delete changeset.id; // Export without chnageset_id
 
-         function displayValue(tval) {
-           tval = tval || '';
+           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 (_optstrings) {
-             var found = _comboData.find(function (o) {
-               return o.key === tval && o.value;
+           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);
              });
+           }
+
+           linkEnter.call(svgIcon('#iD-icon-load', 'inline')).append('span').html(_t.html('commit.download_changes'));
 
-             if (found) {
-               return found.value;
+           function mouseover(d) {
+             if (d.entity) {
+               context.surface().selectAll(utilEntityOrMemberSelector([d.entity.id], context.graph())).classed('hover', true);
              }
            }
 
-           if (field.type === 'typeCombo' && tval.toLowerCase() === 'yes') {
-             return '';
+           function mouseout() {
+             context.surface().selectAll('.hover').classed('hover', false);
            }
 
-           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}]
-         //
+           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);
+             }
+           }
+         }
 
+         return section;
+       }
 
-         function objectDifference(a, b) {
-           return a.filter(function (d1) {
-             return !b.some(function (d2) {
-               return !d2.isMixed && d1.value === d2.value;
-             });
+       function uiCommitWarnings(context) {
+         function commitWarnings(selection) {
+           var issuesBySeverity = context.validator().getIssuesBySeverity({
+             what: 'edited',
+             where: 'all',
+             includeDisabledRules: true
            });
-         }
-
-         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;
+           for (var severity in issuesBySeverity) {
+             var issues = issuesBySeverity[severity];
 
-           if (_optstrings) {
-             _comboData = Object.keys(_optstrings).map(function (k) {
-               var v = field.t('options.' + k, {
-                 'default': _optstrings[k]
+             if (severity !== 'error') {
+               // exclude 'fixme' and similar - #8603
+               issues = issues.filter(function (issue) {
+                 return issue.type !== 'help_request';
                });
-               return {
-                 key: k,
-                 value: v,
-                 title: v,
-                 display: field.t.html('options.' + k, {
-                   'default': _optstrings[k]
-                 })
-               };
+             }
+
+             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;
              });
-           } else if (_optarray) {
-             _comboData = _optarray.map(function (k) {
-               var v = _snake_case ? unsnake(k) : k;
-               return {
-                 key: k,
-                 value: v,
-                 title: v
-               };
+             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);
              });
            }
+         }
 
-           _combobox.data(objectDifference(_comboData, _multiData));
+         return commitWarnings;
+       }
 
-           if (callback) callback(_comboData);
-         }
+       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 setTaginfoValues(q, callback) {
-           var fn = _isMulti ? 'multikeys' : 'values';
-           var query = (_isMulti ? field.key : '') + q;
-           var hasCountryPrefix = _isNetwork && _countryCode && _countryCode.indexOf(q.toLowerCase()) === 0;
+       var hashtagRegex = /(#[^\u2000-\u206F\u2E00-\u2E7F\s\\'!"#$%()*,.\/:;<=>?@\[\]^`{|}~]+)/g;
+       function uiCommit(context) {
+         var dispatch = dispatch$8('cancel');
 
-           if (hasCountryPrefix) {
-             query = _countryCode + ':';
-           }
+         var _userDetails;
 
-           var params = {
-             debounce: q !== '',
-             key: field.key,
-             query: query
-           };
+         var _selection;
 
-           if (_entityIDs.length) {
-             params.geometry = context.graph().geometry(_entityIDs[0]);
-           }
+         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);
 
-           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
+         function commit(selection) {
+           _selection = selection; // Initialize changeset if one does not exist yet.
 
+           if (!context.changeset) initChangeset();
+           loadDerivedChangesetTags();
+           selection.call(render);
+         }
 
-               return !d.count || d.count > 10;
-             });
-             var deprecatedValues = osmEntity.deprecatedTagValuesByKey(_dataDeprecated)[field.key];
+         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 (deprecatedValues) {
-               // don't suggest deprecated tag values
-               data = data.filter(function (d) {
-                 return deprecatedValues.indexOf(d.value) === -1;
-               });
-             }
+           if (commentDate > currDate || currDate - commentDate > cutoff) {
+             corePreferences('comment', null);
+             corePreferences('hashtags', null);
+             corePreferences('source', null);
+           } // load in explicitly-set values, if any
 
-             if (hasCountryPrefix) {
-               data = data.filter(function (d) {
-                 return d.value.toLowerCase().indexOf(_countryCode + ':') === 0;
-               });
-             } // hide the caret if there are no suggestions
 
+           if (context.defaultChangesetComment()) {
+             corePreferences('comment', context.defaultChangesetComment());
+             corePreferences('commentDate', Date.now());
+           }
+
+           if (context.defaultChangesetSource()) {
+             corePreferences('source', context.defaultChangesetSource());
+             corePreferences('commentDate', Date.now());
+           }
+
+           if (context.defaultChangesetHashtags()) {
+             corePreferences('hashtags', context.defaultChangesetHashtags());
+             corePreferences('commentDate', Date.now());
+           }
+
+           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');
 
-             _container.classed('empty-combobox', data.length === 0);
+           if (hashtags) {
+             tags.hashtags = hashtags;
+           }
 
-             _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);
-           });
-         }
+           var source = corePreferences('source');
 
-         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 (source) {
+             tags.source = source;
            }
 
-           if (!/(…|\.\.\.)$/.test(_staticPlaceholder)) {
-             _staticPlaceholder += '…';
-           }
+           var photoOverlaysUsed = context.history().photoOverlaysUsed();
 
-           var ph;
+           if (photoOverlaysUsed.length) {
+             var sources = (tags.source || '').split(';'); // include this tag for any photo layer
 
-           if (!_isMulti && !_isSemi && _tags && Array.isArray(_tags[field.key])) {
-             ph = _t('inspector.multiple_values');
-           } else {
-             ph = _staticPlaceholder;
-           }
+             if (sources.indexOf('streetlevel imagery') === -1) {
+               sources.push('streetlevel imagery');
+             } // add the photo overlays used during editing as sources
 
-           _container.selectAll('input').attr('placeholder', ph);
-         }
 
-         function change() {
-           var t = {};
-           var val;
+             photoOverlaysUsed.forEach(function (photoOverlay) {
+               if (sources.indexOf(photoOverlay) === -1) {
+                 sources.push(photoOverlay);
+               }
+             });
+             tags.source = context.cleanTagValue(sources.join(';'));
+           }
 
-           if (_isMulti || _isSemi) {
-             val = tagValue(utilGetSetValue(_input).replace(/,/g, ';')) || '';
+           context.changeset = new osmChangeset({
+             tags: tags
+           });
+         } // Calculates read-only metadata tags based on the user's editing session and applies
+         // them to the changeset.
 
-             _container.classed('active', false);
 
-             utilGetSetValue(_input, '');
-             var vals = val.split(';').filter(Boolean);
-             if (!vals.length) return;
+         function loadDerivedChangesetTags() {
+           var osm = context.connection();
+           if (!osm) return;
+           var tags = Object.assign({}, context.changeset.tags); // shallow copy
+           // assign tags for imagery used
 
-             if (_isMulti) {
-               utilArrayUniq(vals).forEach(function (v) {
-                 var key = (field.key || '') + v;
+           var imageryUsed = context.cleanTagValue(context.history().imageryUsed().join(';'));
+           tags.imagery_used = imageryUsed || 'None'; // assign tags for closed issues and notes
 
-                 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;
-                 }
+           var osmClosed = osm.getClosedIDs();
+           var itemType;
 
-                 key = context.cleanTagKey(key);
-                 field.keys.push(key);
-                 t[key] = 'yes';
-               });
-             } else if (_isSemi) {
-               var arr = _multiData.map(function (d) {
-                 return d.key;
-               });
+           if (osmClosed.length) {
+             tags['closed:note'] = context.cleanTagValue(osmClosed.join(';'));
+           }
 
-               arr = arr.concat(vals);
-               t[field.key] = context.cleanTagValue(utilArrayUniq(arr).filter(Boolean).join(';'));
+           if (services.keepRight) {
+             var krClosed = services.keepRight.getClosedIDs();
+
+             if (krClosed.length) {
+               tags['closed:keepright'] = context.cleanTagValue(krClosed.join(';'));
              }
+           }
 
-             window.setTimeout(function () {
-               _input.node().focus();
-             }, 10);
-           } else {
-             var rawValue = utilGetSetValue(_input); // don't override multiple values with blank string
+           if (services.improveOSM) {
+             var iOsmClosed = services.improveOSM.getClosedCounts();
 
-             if (!rawValue && Array.isArray(_tags[field.key])) return;
-             val = context.cleanTagValue(tagValue(rawValue));
-             t[field.key] = val || undefined;
+             for (itemType in iOsmClosed) {
+               tags['closed:improveosm:' + itemType] = context.cleanTagValue(iOsmClosed[itemType].toString());
+             }
            }
 
-           dispatch$1.call('change', this, t);
-         }
+           if (services.osmose) {
+             var osmoseClosed = services.osmose.getClosedCounts();
 
-         function removeMultikey(d3_event, d) {
-           d3_event.preventDefault();
-           d3_event.stopPropagation();
-           var t = {};
+             for (itemType in osmoseClosed) {
+               tags['closed:osmose:' + itemType] = context.cleanTagValue(osmoseClosed[itemType].toString());
+             }
+           } // remove existing issue counts
 
-           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);
 
-             arr = utilArrayUniq(arr);
-             t[field.key] = arr.length ? arr.join(';') : undefined;
+           for (var key in tags) {
+             if (key.match(/(^warnings:)|(^resolved:)/)) {
+               delete tags[key];
+             }
            }
 
-           dispatch$1.call('change', this, t);
-         }
+           function addIssueCounts(issues, prefix) {
+             var issuesByType = utilArrayGroupBy(issues, 'type');
 
-         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);
+             for (var issueType in issuesByType) {
+               var issuesOfType = issuesByType[issueType];
 
-           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
+               if (issuesOfType[0].subtype) {
+                 var issuesBySubtype = utilArrayGroupBy(issuesOfType, 'subtype');
 
-             if (field.key === 'destination') {
-               listClass += ' full-line-chips';
+                 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
 
-             _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);
+           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 (_isNetwork) {
-             var extent = combinedEntityExtent();
-             var countryCode = extent && iso1A2Code(extent.center());
-             _countryCode = countryCode && countryCode.toLowerCase();
+           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
+           });
+         }
+
+         function render(selection) {
+           var osm = context.connection();
+           if (!osm) return;
+           var header = selection.selectAll('.header').data([0]);
+           var headerTitle = header.enter().append('div').attr('class', 'header fillL');
+           headerTitle.append('div').append('h3').html(_t.html('commit.title'));
+           headerTitle.append('button').attr('class', 'close').on('click', function () {
+             dispatch.call('cancel', this);
+           }).call(svgIcon('#iD-icon-close'));
+           var body = selection.selectAll('.body').data([0]);
+           body = body.enter().append('div').attr('class', 'body').merge(body); // Changeset Section
+
+           var changesetSection = body.selectAll('.changeset-editor').data([0]);
+           changesetSection = changesetSection.enter().append('div').attr('class', 'modal-section changeset-editor').merge(changesetSection);
+           changesetSection.call(changesetEditor.changesetID(context.changeset.id).tags(context.changeset.tags)); // Warnings
+
+           body.call(commitWarnings); // Upload Explanation
+
+           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]);
+
+           if (prose.enter().size()) {
+             // first time, make sure to update user details in prose
+             _userDetails = null;
            }
 
-           _input.on('change', change).on('blur', change);
+           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
 
-           _input.on('keydown.field', function (d3_event) {
-             switch (d3_event.keyCode) {
-               case 13:
-                 // ↩ Return
-                 _input.node().blur(); // blurring also enters the value
+           osm.userDetails(function (err, user) {
+             if (err) return;
+             if (_userDetails === user) return; // no change
 
+             _userDetails = user;
+             var userLink = select(document.createElement('div'));
 
-                 d3_event.stopPropagation();
-                 break;
+             if (user.image_url) {
+               userLink.append('img').attr('src', user.image_url).attr('class', 'icon pre-text user-icon');
              }
-           });
 
-           if (_isMulti || _isSemi) {
-             _combobox.on('accept', function () {
-               _input.node().blur();
+             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
 
-               _input.node().focus();
-             });
+           var requestReview = saveSection.selectAll('.request-review').data([0]); // Enter
 
-             _input.on('focus', function () {
-               _container.classed('active', true);
-             });
+           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'));
            }
-         }
 
-         combo.tags = function (tags) {
-           _tags = tags;
+           labelEnter.append('input').attr('type', 'checkbox').attr('id', requestReviewDomId);
+           labelEnter.append('span').html(_t.html('commit.request_review')); // Update
 
-           if (_isMulti || _isSemi) {
-             _multiData = [];
-             var maxLength;
+           requestReview = requestReview.merge(requestReviewEnter);
+           var requestReviewInput = requestReview.selectAll('input').property('checked', isReviewRequested(context.changeset.tags)).on('change', toggleRequestReview); // Buttons
 
-             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;
+           var buttonSection = saveSection.selectAll('.buttons').data([0]); // enter
 
-                 _multiData.push({
-                   key: k,
-                   value: displayValue(suffix),
-                   isMixed: Array.isArray(v)
-                 });
-               }
+           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
 
-               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
+           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
 
-                 maxLength = context.maxCharsForTagKey() - utilUnicodeCharsCount(field.key);
-               } else {
-                 maxLength = context.maxCharsForTagKey();
+               for (var key in context.changeset.tags) {
+                 // remove any empty keys before upload
+                 if (!key) delete context.changeset.tags[key];
                }
-             } 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);
+               context.uploader().save(context.changeset);
+             }
+           }); // remove any existing tooltip
 
-                   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;
-               }
+           uiTooltip().destroyAny(buttonSection.selectAll('.save-button'));
 
-               _multiData = allValues.map(function (v) {
-                 return {
-                   key: v,
-                   value: displayValue(v),
-                   isMixed: !commonValues.includes(v)
-                 };
-               });
-               var currLength = utilUnicodeCharsCount(commonValues.join(';')); // limit the input length to the remaining available characters
+           if (uploadBlockerTooltipText) {
+             buttonSection.selectAll('.save-button').call(uiTooltip().title(uploadBlockerTooltipText).placement('top'));
+           } // Raw Tag Editor
 
-               maxLength = context.maxCharsForTagValue() - currLength;
 
-               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
+           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
 
+           changesSection.call(commitChanges.render);
 
-             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 toggleRequestReview() {
+             var rr = requestReviewInput.property('checked');
+             updateChangeset({
+               review_requested: rr ? 'yes' : undefined
+             });
+             tagSection.call(rawTagEditor.tags(Object.assign({}, context.changeset.tags)) // shallow copy
+             .render);
+           }
+         }
 
-             var available = objectDifference(_comboData, _multiData);
+         function getUploadBlockerMessage() {
+           var errors = context.validator().getIssuesBySeverity({
+             what: 'edited',
+             where: 'all'
+           }).error;
 
-             _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 (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 (!hasChangesetComment) {
+               return _t('commit.comment_needed_message');
+             }
+           }
 
+           return null;
+         }
 
-             var hideAdd = _optstrings && !available.length || maxLength <= 0;
+         function changeTags(_, changed, onInput) {
+           if (changed.hasOwnProperty('comment')) {
+             if (changed.comment === undefined) {
+               changed.comment = '';
+             }
 
-             _container.selectAll('.chiplist .input-wrap').style('display', hideAdd ? 'none' : null); // Render chips
+             if (!onInput) {
+               corePreferences('comment', changed.comment);
+               corePreferences('commentDate', Date.now());
+             }
+           }
 
+           if (changed.hasOwnProperty('source')) {
+             if (changed.source === undefined) {
+               corePreferences('source', null);
+             } else if (!onInput) {
+               corePreferences('source', changed.source);
+               corePreferences('commentDate', Date.now());
+             }
+           } // no need to update `prefs` for `hashtags` here since it's done in `updateChangeset`
 
-             var chips = _container.selectAll('.chip').data(_multiData);
 
-             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;
-             });
+           updateChangeset(changed, onInput);
 
-             if (allowDragAndDrop) {
-               registerDragAndDrop(chips);
-             }
+           if (_selection) {
+             _selection.call(render);
+           }
+         }
 
-             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 findHashtags(tags, commentOnly) {
+           var detectedHashtags = commentHashtags();
+
+           if (detectedHashtags.length) {
+             // always remove stored hashtags if there are hashtags in the comment - #4304
+             corePreferences('hashtags', null);
            }
-         };
 
-         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 (!detectedHashtags.length || !commentOnly) {
+             detectedHashtags = detectedHashtags.concat(hashtagHashtags());
+           }
 
-             if (field.key === 'destination') {
-               // meaning tags are full width
-               _container.selectAll('.chip').style('transform', function (d2, index2) {
-                 var node = select(this).node();
+           var allLowerCase = new Set();
+           return detectedHashtags.filter(function (hashtag) {
+             // Compare tags as lowercase strings, but keep original case tags
+             var lowerCase = hashtag.toLowerCase();
 
-                 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;
-                   }
+             if (!allLowerCase.has(lowerCase)) {
+               allLowerCase.add(lowerCase);
+               return true;
+             }
 
-                   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 false;
+           }); // Extract hashtags from `comment`
 
-                   return 'translateY(100%)';
-                 }
+           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`
 
-                 return null;
-               });
-             } else {
-               _container.selectAll('.chip').each(function (d2, index2) {
-                 var node = select(this).node(); // check the cursor is in the bounding box
 
-                 if (index !== index2 && 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();
+           function hashtagHashtags() {
+             var matches = (tags.hashtags || '').split(/[,;\s]+/).map(function (s) {
+               if (s[0] !== '#') {
+                 s = '#' + s;
+               } // prepend '#'
+
+
+               var matched = s.match(hashtagRegex);
+               return matched && matched[0];
+             }).filter(Boolean); // exclude falsy
 
-                 if (index === index2) {
-                   return 'translate(' + x + 'px, ' + y + 'px)';
-                 } // only translate tags in the same row
+             return matches || [];
+           }
+         }
 
+         function isReviewRequested(tags) {
+           var rr = tags.review_requested;
+           if (rr === undefined) return false;
+           rr = rr.trim().toLowerCase();
+           return !(rr === '' || rr === 'no');
+         }
 
-                 if (node.offsetTop === targetIndexOffsetTop) {
-                   if (index2 < index && index2 >= targetIndex) {
-                     return 'translateX(' + draggedTagWidth + 'px)';
-                   } else if (index2 > index && index2 <= targetIndex) {
-                     return 'translateX(-' + draggedTagWidth + 'px)';
-                   }
-                 }
+         function updateChangeset(changed, onInput) {
+           var tags = Object.assign({}, context.changeset.tags); // shallow copy
 
-                 return null;
-               });
+           Object.keys(changed).forEach(function (k) {
+             var v = changed[k];
+             k = context.cleanTagKey(k);
+             if (readOnlyTags.indexOf(k) !== -1) return;
+
+             if (v === undefined) {
+               delete tags[k];
+             } else if (onInput) {
+               tags[k] = v;
+             } else {
+               tags[k] = context.cleanTagValue(v);
              }
-           }).on('end', function () {
-             if (!select(this).classed('dragging')) {
-               return;
+           });
+
+           if (!onInput) {
+             // when changing the comment, override hashtags with any found in comment.
+             var commentOnly = changed.hasOwnProperty('comment') && changed.comment !== '';
+             var arr = findHashtags(tags, commentOnly);
+
+             if (arr.length) {
+               tags.hashtags = context.cleanTagValue(arr.join(';'));
+               corePreferences('hashtags', tags.hashtags);
+             } else {
+               delete tags.hashtags;
+               corePreferences('hashtags', null);
              }
+           } // always update userdetails, just in case user reauthenticates as someone else
 
-             var index = selection.nodes().indexOf(this);
-             select(this).classed('dragging', false);
 
-             _container.selectAll('.chip').style('transform', null);
+           if (_userDetails && _userDetails.changesets_count !== undefined) {
+             var changesetsCount = parseInt(_userDetails.changesets_count, 10) + 1; // #4283
 
-             if (typeof targetIndex === 'number') {
-               var element = _multiData[index];
+             tags.changesets_count = String(changesetsCount); // first 100 edits - new user
 
-               _multiData.splice(index, 1);
+             if (changesetsCount <= 100) {
+               var s;
+               s = corePreferences('walkthrough_completed');
 
-               _multiData.splice(targetIndex, 0, element);
+               if (s) {
+                 tags['ideditor:walkthrough_completed'] = s;
+               }
 
-               var t = {};
+               s = corePreferences('walkthrough_progress');
 
-               if (_multiData.length) {
-                 t[field.key] = _multiData.map(function (element) {
-                   return element.key;
-                 }).join(';');
-               } else {
-                 t[field.key] = undefined;
+               if (s) {
+                 tags['ideditor:walkthrough_progress'] = s;
                }
 
-               dispatch$1.call('change', this, t);
+               s = corePreferences('walkthrough_started');
+
+               if (s) {
+                 tags['ideditor:walkthrough_started'] = s;
+               }
              }
+           } else {
+             delete tags.changesets_count;
+           }
 
-             dragOrigin = undefined;
-             targetIndex = undefined;
-           }));
+           if (!fastDeepEqual(context.changeset.tags, tags)) {
+             context.changeset = context.changeset.update({
+               tags: tags
+             });
+           }
          }
 
-         combo.focus = function () {
-           _input.node().focus();
+         commit.reset = function () {
+           context.changeset = null;
          };
 
-         combo.entityIDs = function (val) {
-           if (!arguments.length) return _entityIDs;
-           _entityIDs = val;
-           return combo;
-         };
+         return utilRebind(commit, dispatch, 'on');
+       }
 
-         function combinedEntityExtent() {
-           return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
-         }
+       // for punction see https://stackoverflow.com/a/21224179
 
-         return utilRebind(combo, dispatch$1, 'on');
+       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());
        }
 
-       function uiFieldText(field, context) {
-         var dispatch$1 = dispatch('change');
-         var input = select(null);
-         var outlinkButton = select(null);
-         var _entityIDs = [];
+       // `resolveStrings`
+       // Resolves the text strings for a given community index item
+       //
+       // Arguments
+       //   `item`:  Object containing the community index item
+       //   `defaults`: Object containing the community index default strings
+       //   `localizerFn?`: optional function we will call to do the localization.
+       //      This function should be like the iD `t()` function that
+       //      accepts a `stringID` and returns a localized string
+       //
+       // Returns
+       //   An Object containing all the resolved strings:
+       //   {
+       //     name:                     'talk-ru Mailing List',
+       //     url:                      'https://lists.openstreetmap.org/listinfo/talk-ru',
+       //     signupUrl:                'https://example.url/signup',
+       //     description:              'A one line description',
+       //     extendedDescription:      'Extended description',
+       //     nameHTML:                 '<a href="the url">the name</a>',
+       //     urlHTML:                  '<a href="the url">the url</a>',
+       //     signupUrlHTML:            '<a href="the signupUrl">the signupUrl</a>',
+       //     descriptionHTML:          the description, with urls and signupUrls linkified,
+       //     extendedDescriptionHTML:  the extendedDescription with urls and signupUrls linkified
+       //   }
+       //
 
-         var _tags;
+       function resolveStrings(item, defaults, localizerFn) {
+         var itemStrings = Object.assign({}, item.strings); // shallow clone
 
-         var _phoneFormats = {};
+         var defaultStrings = Object.assign({}, defaults[item.type]); // shallow clone
 
-         if (field.type === 'tel') {
-           _mainFileFetcher.get('phone_formats').then(function (d) {
-             _phoneFormats = d;
-             updatePhonePlaceholder();
-           })["catch"](function () {
-             /* ignore */
+         var anyToken = new RegExp(/(\{\w+\})/, 'gi'); // Pre-localize the item and default strings
+
+         if (localizerFn) {
+           if (itemStrings.community) {
+             var communityID = simplify(itemStrings.community);
+             itemStrings.community = localizerFn("_communities.".concat(communityID));
+           }
+
+           ['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));
            });
          }
 
-         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());
+         var replacements = {
+           account: item.account,
+           community: itemStrings.community,
+           signupUrl: itemStrings.signupUrl,
+           url: itemStrings.url
+         }; // Resolve URLs first (which may refer to {account})
 
-           if (field.type === 'tel') {
-             updatePhonePlaceholder();
-           } else if (field.type === 'number') {
-             var rtl = _mainLocalizer.textDirection() === 'rtl';
-             input.attr('type', 'text');
-             var inc = field.increment;
-             var buttons = wrap.selectAll('.increment, .decrement').data(rtl ? [inc, -inc] : [-inc, inc]);
-             buttons.enter().append('button').attr('class', function (d) {
-               var which = d > 0 ? 'increment' : 'decrement';
-               return 'form-field-button ' + which;
-             }).merge(buttons).on('click', function (d3_event, d) {
-               d3_event.preventDefault();
-               var raw_vals = input.node().value || '0';
-               var vals = raw_vals.split(';');
-               vals = vals.map(function (v) {
-                 var num = parseFloat(v.trim(), 10);
-                 return isFinite(num) ? clamped(num + d) : v.trim();
-               });
-               input.node().value = vals.join(';');
-               change()();
-             });
-           } else if (field.type === 'identifier' && field.urlFormat && field.pattern) {
-             input.attr('type', 'text');
-             outlinkButton = wrap.selectAll('.foreign-id-permalink').data([0]);
-             outlinkButton.enter().append('button').call(svgIcon('#iD-icon-out-link')).attr('class', 'form-field-button foreign-id-permalink').attr('title', function () {
-               var domainResults = /^https?:\/\/(.{1,}?)\//.exec(field.urlFormat);
+         if (!replacements.signupUrl) {
+           replacements.signupUrl = resolve(itemStrings.signupUrl || defaultStrings.signupUrl);
+         }
 
-               if (domainResults.length >= 2 && domainResults[1]) {
-                 var domain = domainResults[1];
-                 return _t('icons.view_on', {
-                   domain: domain
-                 });
-               }
+         if (!replacements.url) {
+           replacements.url = resolve(itemStrings.url || defaultStrings.url);
+         }
 
-               return '';
-             }).on('click', function (d3_event) {
-               d3_event.preventDefault();
-               var value = validIdentifierValueForLink();
+         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 (value) {
-                 var url = field.urlFormat.replace(/{value}/, encodeURIComponent(value));
-                 window.open(url, '_blank');
-               }
-             }).merge(outlinkButton);
-           }
-         }
+         resolved.nameHTML = linkify(resolved.url, resolved.name);
+         resolved.urlHTML = linkify(resolved.url);
+         resolved.signupUrlHTML = linkify(resolved.signupUrl);
+         resolved.descriptionHTML = resolve(itemStrings.description || defaultStrings.description, true);
+         resolved.extendedDescriptionHTML = resolve(itemStrings.extendedDescription || defaultStrings.extendedDescription, true);
+         return resolved;
 
-         function updatePhonePlaceholder() {
-           if (input.empty() || !Object.keys(_phoneFormats).length) return;
-           var extent = combinedEntityExtent();
-           var countryCode = extent && iso1A2Code(extent.center());
+         function resolve(s, addLinks) {
+           if (!s) return undefined;
+           var result = s;
 
-           var format = countryCode && _phoneFormats[countryCode.toLowerCase()];
+           for (var key in replacements) {
+             var token = "{".concat(key, "}");
+             var regex = new RegExp(token, 'g');
 
-           if (format) input.attr('placeholder', format);
-         }
+             if (regex.test(result)) {
+               var replacement = replacements[key];
 
-         function validIdentifierValueForLink() {
-           if (field.type === 'identifier' && field.pattern) {
-             var value = utilGetSetValue(input).trim().split(';')[0];
-             return value && value.match(new RegExp(field.pattern));
-           }
+               if (!replacement) {
+                 throw new Error("Cannot resolve token: ".concat(token));
+               } else {
+                 if (addLinks && (key === 'signupUrl' || key === 'url')) {
+                   replacement = linkify(replacement);
+                 }
 
-           return null;
-         } // clamp number to min/max
+                 result = result.replace(regex, replacement);
+               }
+             }
+           } // There shouldn't be any leftover tokens in a resolved string
 
 
-         function clamped(num) {
-           if (field.minValue !== undefined) {
-             num = Math.max(num, field.minValue);
-           }
+           var leftovers = result.match(anyToken);
 
-           if (field.maxValue !== undefined) {
-             num = Math.min(num, field.maxValue);
+           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
+
+
+           if (addLinks && item.type === 'reddit') {
+             result = result.replace(/(\/r\/\w+\/*)/i, function (match) {
+               return linkify(resolved.url, match);
+             });
            }
 
-           return num;
+           return result;
          }
 
-         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
+         function linkify(url, text) {
+           if (!url) return undefined;
+           text = text || url;
+           return "<a target=\"_blank\" href=\"".concat(url, "\">").concat(text, "</a>");
+         }
+       }
 
-             if (!val && Array.isArray(_tags[field.key])) return;
+       var _oci = null;
+       function uiSuccess(context) {
+         var MAXEVENTS = 2;
+         var dispatch = dispatch$8('cancel');
 
-             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(';');
-               }
+         var _changeset;
 
-               utilGetSetValue(input, val);
+         var _location;
+
+         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]);
              }
 
-             t[field.key] = val || undefined;
-             dispatch$1.call('change', this, t, onInput);
-           };
-         }
+             var ociResources = Object.values(vals[1].resources);
 
-         i.entityIDs = function (val) {
-           if (!arguments.length) return _entityIDs;
-           _entityIDs = val;
-           return i;
-         };
+             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
 
-         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 (outlinkButton && !outlinkButton.empty()) {
-             var disabled = !validIdentifierValueForLink();
-             outlinkButton.classed('disabled', disabled);
-           }
-         };
+         function parseEventDate(when) {
+           if (!when) return;
+           var raw = when.trim();
+           if (!raw) return;
 
-         i.focus = function () {
-           var node = input.node();
-           if (node) node.focus();
-         };
+           if (!/Z$/.test(raw)) {
+             // if no trailing 'Z', add one
+             raw += 'Z'; // this forces date to be parsed as a UTC date
+           }
 
-         function combinedEntityExtent() {
-           return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+           var parsed = new Date(raw);
+           return new Date(parsed.toUTCString().substr(0, 25)); // convert to local timezone
          }
 
-         return utilRebind(i, dispatch$1, 'on');
-       }
+         function success(selection) {
+           var header = selection.append('div').attr('class', 'header fillL');
+           header.append('h3').html(_t.html('success.just_edited'));
+           header.append('button').attr('class', 'close').on('click', function () {
+             return dispatch.call('cancel');
+           }).call(svgIcon('#iD-icon-close'));
+           var body = selection.append('div').attr('class', 'body save-success fillL');
+           var summary = body.append('div').attr('class', 'save-summary');
+           summary.append('h3').html(_t.html('success.thank_you' + (_location ? '_location' : ''), {
+             where: _location
+           }));
+           summary.append('p').html(_t.html('success.help_html')).append('a').attr('class', 'link-out').attr('target', '_blank').attr('href', _t('success.help_link_url')).call(svgIcon('#iD-icon-out-link', 'inline')).append('span').html(_t.html('success.help_link_text'));
+           var osm = context.connection();
+           if (!osm) return;
+           var changesetURL = osm.changesetURL(_changeset.id);
+           var table = summary.append('table').attr('class', 'summary-table');
+           var row = table.append('tr').attr('class', 'summary-row');
+           row.append('td').attr('class', 'cell-icon summary-icon').append('a').attr('target', '_blank').attr('href', changesetURL).append('svg').attr('class', 'logo-small').append('use').attr('xlink:href', '#iD-logo-osm');
+           var summaryDetail = row.append('td').attr('class', 'cell-detail summary-detail');
+           summaryDetail.append('a').attr('class', 'cell-detail summary-view-on-osm').attr('target', '_blank').attr('href', changesetURL).html(_t.html('success.view_on_osm'));
+           summaryDetail.append('div').html(_t.html('success.changeset_id', {
+             changeset_id: "<a href=\"".concat(changesetURL, "\" target=\"_blank\">").concat(_changeset.id, "</a>")
+           })); // Get OSM community index features intersecting the map..
 
-       function uiFieldAccess(field, context) {
-         var dispatch$1 = dispatch('change');
-         var items = select(null);
+           ensureOSMCommunityIndex().then(function (oci) {
+             var loc = context.map().center();
+             var validLocations = _mainLocations.locationsAt(loc); // Gather the communities
 
-         var _tags;
+             var communities = [];
+             oci.resources.forEach(function (resource) {
+               var area = validLocations[resource.locationSetID];
+               if (!area) return; // Resolve strings
 
-         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
+               var localizer = function localizer(stringID) {
+                 return _t.html("community.".concat(stringID));
+               };
 
-           var enter = items.enter().append('li').attr('class', function (d) {
-             return 'labeled-input preset-access-' + d;
-           });
-           enter.append('span').attr('class', 'label preset-label-access').attr('for', function (d) {
-             return 'preset-input-access-' + d;
-           }).html(function (d) {
-             return field.t.html('types.' + d);
-           });
-           enter.append('div').attr('class', 'preset-input-access-wrap').append('input').attr('type', 'text').attr('class', function (d) {
-             return 'preset-input-access preset-input-access-' + d;
-           }).call(utilNoAuto).each(function (d) {
-             select(this).call(uiCombobox(context, 'access-' + d).data(access.options(d)));
-           }); // Update
+               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
 
-           items = items.merge(enter);
-           wrap.selectAll('.preset-input-access').on('change', change).on('blur', change);
+             communities.sort(function (a, b) {
+               return a.area - b.area || b.order - a.order;
+             });
+             body.call(showCommunityLinks, communities.map(function (c) {
+               return c.resource;
+             }));
+           });
          }
 
-         function change(d3_event, d) {
-           var tag = {};
-           var value = context.cleanTagValue(utilGetSetValue(select(this))); // don't override multiple values with blank string
-
-           if (!value && typeof _tags[d] !== 'string') return;
-           tag[d] = value || undefined;
-           dispatch$1.call('change', this, tag);
+         function showCommunityLinks(selection, resources) {
+           var communityLinks = selection.append('div').attr('class', 'save-communityLinks');
+           communityLinks.append('h3').html(_t.html('success.like_osm'));
+           var table = communityLinks.append('table').attr('class', 'community-table');
+           var row = table.selectAll('.community-row').data(resources);
+           var rowEnter = row.enter().append('tr').attr('class', 'community-row');
+           rowEnter.append('td').attr('class', 'cell-icon community-icon').append('a').attr('target', '_blank').attr('href', function (d) {
+             return d.resolved.url;
+           }).append('svg').attr('class', 'logo-small').append('use').attr('xlink:href', function (d) {
+             return "#community-".concat(d.type);
+           });
+           var communityDetail = rowEnter.append('td').attr('class', 'cell-detail community-detail');
+           communityDetail.each(showCommunityDetails);
+           communityLinks.append('div').attr('class', 'community-missing').html(_t.html('success.missing')).append('a').attr('class', 'link-out').attr('target', '_blank').call(svgIcon('#iD-icon-out-link', 'inline')).attr('href', 'https://github.com/osmlab/osm-community-index/issues').append('span').html(_t.html('success.tell_us'));
          }
 
-         access.options = function (type) {
-           var options = ['no', 'permissive', 'private', 'permit', 'destination'];
-
-           if (type !== 'access') {
-             options.unshift('yes');
-             options.push('designated');
+         function showCommunityDetails(d) {
+           var selection = select(this);
+           var communityID = d.id;
+           selection.append('div').attr('class', 'community-name').html(d.resolved.nameHTML);
+           selection.append('div').attr('class', 'community-description').html(d.resolved.descriptionHTML); // Create an expanding section if any of these are present..
 
-             if (type === 'bicycle') {
-               options.push('dismount');
-             }
+           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));
            }
 
-           return options.map(function (option) {
-             return {
-               title: field.t('options.' + option + '.description'),
-               value: option
-             };
-           });
-         };
+           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
 
-         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'
+           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);
            }
-         };
 
-         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 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').html(_t.html('success.languages', {
+                 languages: languageList
+               }));
              }
+           }
 
-             if (d === 'access') {
-               return 'yes';
-             }
+           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 (tags.access && typeof tags.access === 'string') {
-               return tags.access;
-             }
+               if (d.i18n && d.id) {
+                 name = _t("community.".concat(communityID, ".events.").concat(d.id, ".name"), {
+                   "default": name
+                 });
+               }
 
-             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);
+               return name;
+             });
+             itemEnter.append('div').attr('class', 'community-event-when').html(function (d) {
+               var options = {
+                 weekday: 'short',
+                 day: 'numeric',
+                 month: 'short',
+                 year: 'numeric'
+               };
 
-                 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];
-                 }
+               if (d.date.getHours() || d.date.getMinutes()) {
+                 // include time if it has one
+                 options.hour = 'numeric';
+                 options.minute = 'numeric';
                }
-             }
 
-             return field.placeholder();
-           });
+               return d.date.toLocaleString(_mainLocalizer.localeCode(), options);
+             });
+             itemEnter.append('div').attr('class', 'community-event-where').html(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').html(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;
+             });
+           }
+         }
+
+         success.changeset = function (val) {
+           if (!arguments.length) return _changeset;
+           _changeset = val;
+           return success;
          };
 
-         access.focus = function () {
-           items.selectAll('.preset-input-access').node().focus();
+         success.location = function (val) {
+           if (!arguments.length) return _location;
+           _location = val;
+           return success;
          };
 
-         return utilRebind(access, dispatch$1, 'on');
+         return utilRebind(success, dispatch, 'on');
        }
 
-       function uiFieldAddress(field, context) {
-         var dispatch$1 = dispatch('change');
+       function modeSave(context) {
+         var mode = {
+           id: 'save'
+         };
+         var keybinding = utilKeybinding('modeSave');
+         var commit = uiCommit(context).on('cancel', cancel);
 
-         var _selection = select(null);
+         var _conflictsUi; // uiConflicts
 
-         var _wrap = select(null);
 
-         var addrField = _mainPresetIndex.field('address'); // needed for placeholder strings
+         var _location;
 
-         var _entityIDs = [];
+         var _success;
 
-         var _tags;
+         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);
 
-         var _countryCode;
+         function cancel() {
+           context.enter(modeBrowse(context));
+         }
 
-         var _addressFormats = [{
-           format: [['housenumber', 'street'], ['city', 'postcode']]
-         }];
-         _mainFileFetcher.get('address_formats').then(function (d) {
-           _addressFormats = d;
+         function showProgress(num, total) {
+           var modal = context.container().select('.loading-modal .modal-section');
+           var progress = modal.selectAll('.progress').data([0]); // enter/update
 
-           if (!_selection.empty()) {
-             _selection.call(address);
-           }
-         })["catch"](function () {
-           /* ignore */
-         });
+           progress.enter().append('div').attr('class', 'progress').merge(progress).text(_t('save.conflict_progress', {
+             num: num,
+             total: total
+           }));
+         }
 
-         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;
+         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);
            });
-           return utilArrayUniqBy(streets, 'value');
+           selection.call(_conflictsUi);
+         }
 
-           function isAddressable(d) {
-             return d.tags.highway && d.tags.name && d.type === 'way';
-           }
+         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 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;
+         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);
            });
-           return utilArrayUniqBy(cities, 'value');
+           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 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 showSuccess(changeset) {
+           commit.reset();
 
-             if (d.tags['addr:city']) return true;
-             return false;
-           }
+           var ui = _success.changeset(changeset).location(_location).on('cancel', function () {
+             context.ui().sidebar.hide();
+           });
+
+           context.enter(modeBrowse(context).sidebar(ui));
          }
 
-         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');
+         function keybindingOn() {
+           select(document).call(keybinding.on('⎋', cancel, true));
          }
 
-         function updateForCountryCode() {
-           if (!_countryCode) return;
-           var addressFormat;
+         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."
 
-           for (var i = 0; i < _addressFormats.length; i++) {
-             var format = _addressFormats[i];
 
-             if (!format.countryCodes) {
-               addressFormat = format; // choose the default format, keep going
-             } else if (format.countryCodes.indexOf(_countryCode) !== -1) {
-               addressFormat = format; // choose the country format, stop here
+         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
+             });
+           });
+         }
 
-               break;
-             }
+         mode.selectedIDs = function () {
+           return _conflictsUi ? _conflictsUi.shownEntityIds() : [];
+         };
+
+         mode.enter = function () {
+           // Show sidebar
+           context.ui().sidebar.expand();
+
+           function done() {
+             context.ui().sidebar.show(commit);
            }
 
-           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
-           };
+           keybindingOn();
+           context.container().selectAll('.main-content').classed('active', false).classed('inactive', true);
+           var osm = context.connection();
 
-           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
-               };
+           if (!osm) {
+             cancel();
+             return;
+           }
+
+           if (osm.authenticated()) {
+             done();
+           } else {
+             osm.authenticate(function (err) {
+               if (err) {
+                 cancel();
+               } else {
+                 done();
+               }
              });
            }
+         };
 
-           var rows = _wrap.selectAll('.addr-row').data(addressFormat.format, function (d) {
-             return d.toString();
-           });
+         mode.exit = function () {
+           keybindingOff();
+           context.container().selectAll('.main-content').classed('active', true).classed('inactive', false);
+           context.ui().sidebar.hide();
+         };
 
-           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 + '%';
-           });
+         return mode;
+       }
 
-           function addDropdown(d) {
-             if (dropdowns.indexOf(d.id) === -1) return; // not a dropdown
+       function modeSelectError(context, selectedErrorID, selectedErrorService) {
+         var mode = {
+           id: 'select-error',
+           button: 'browse'
+         };
+         var keybinding = utilKeybinding('select-error');
+         var errorService = services[selectedErrorService];
+         var errorEditor;
 
-             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));
-             }));
-           }
+         switch (selectedErrorService) {
+           case 'improveOSM':
+             errorEditor = uiImproveOsmEditor(context).on('change', function () {
+               context.map().pan([0, 0]); // trigger a redraw
 
-           _wrap.selectAll('input').on('blur', change()).on('change', change());
+               var error = checkSelectedID();
+               if (!error) return;
+               context.ui().sidebar.show(errorEditor.error(error));
+             });
+             break;
 
-           _wrap.selectAll('input:not(.combobox-input)').on('input', change(true));
+           case 'keepRight':
+             errorEditor = uiKeepRightEditor(context).on('change', function () {
+               context.map().pan([0, 0]); // trigger a redraw
 
-           if (_tags) updateTags(_tags);
-         }
+               var error = checkSelectedID();
+               if (!error) return;
+               context.ui().sidebar.show(errorEditor.error(error));
+             });
+             break;
 
-         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();
+           case 'osmose':
+             errorEditor = uiOsmoseEditor(context).on('change', function () {
+               context.map().pan([0, 0]); // trigger a redraw
 
-           if (extent) {
-             var countryCode;
+               var error = checkSelectedID();
+               if (!error) return;
+               context.ui().sidebar.show(errorEditor.error(error));
+             });
+             break;
+         }
 
-             if (context.inIntro()) {
-               // localize the address format for the walkthrough
-               countryCode = _t('intro.graph.countrycode');
-             } else {
-               var center = extent.center();
-               countryCode = iso1A2Code(center);
-             }
+         var behaviors = [behaviorBreathe(), behaviorHover(context), behaviorSelect(context), behaviorLasso(context), modeDragNode(context).behavior, modeDragNote(context).behavior];
 
-             if (countryCode) {
-               _countryCode = countryCode.toLowerCase();
-               updateForCountryCode();
-             }
+         function checkSelectedID() {
+           if (!errorService) return;
+           var error = errorService.getError(selectedErrorID);
+
+           if (!error) {
+             context.enter(modeBrowse(context));
            }
+
+           return error;
          }
 
-         function change(onInput) {
-           return function () {
-             var tags = {};
+         mode.zoomToSelected = function () {
+           if (!errorService) return;
+           var error = errorService.getError(selectedErrorID);
 
-             _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
+           if (error) {
+             context.map().centerZoomEase(error.loc, 20);
+           }
+         };
 
-               if (Array.isArray(_tags[key]) && !value) return;
-               tags[key] = value || undefined;
-             });
+         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
 
-             dispatch$1.call('change', this, tags, onInput);
-           };
-         }
+           function selectError(d3_event, drawn) {
+             if (!checkSelectedID()) return;
+             var selection = context.surface().selectAll('.itemId-' + selectedErrorID + '.' + selectedErrorService);
 
-         function updatePlaceholder(inputSelection) {
-           return inputSelection.attr('placeholder', function (subfield) {
-             if (_tags && Array.isArray(_tags[field.key + ':' + subfield.id])) {
-               return _t('inspector.multiple_values');
-             }
+             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 (_countryCode) {
-               var localkey = subfield.id + '!' + _countryCode;
-               var tkey = addrField.strings.placeholders[localkey] ? localkey : subfield.id;
-               return addrField.t('placeholders.' + tkey);
+               if (drawn && source && (source.type === 'pointermove' || source.type === 'mousemove' || source.type === 'touchmove')) {
+                 context.enter(modeBrowse(context));
+               }
+             } else {
+               selection.classed('selected', true);
+               context.selectedErrorID(selectedErrorID);
              }
-           });
-         }
+           }
 
-         function updateTags(tags) {
-           utilGetSetValue(_wrap.selectAll('input'), function (subfield) {
-             var val = tags[field.key + ':' + subfield.id];
-             return typeof val === 'string' ? val : '';
-           }).attr('title', function (subfield) {
-             var val = tags[field.key + ':' + subfield.id];
-             return val && Array.isArray(val) && val.filter(Boolean).join('\n');
-           }).classed('mixed', function (subfield) {
-             return Array.isArray(tags[field.key + ':' + subfield.id]);
-           }).call(updatePlaceholder);
+           function esc() {
+             if (context.container().select('.combobox').size()) return;
+             context.enter(modeBrowse(context));
+           }
+         };
+
+         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([]);
+         };
+
+         return mode;
+       }
+
+       function uiToolOldDrawModes(context) {
+         var tool = {
+           id: 'old_modes',
+           label: _t.html('toolbar.add_feature')
+         };
+         var modes = [modeAddPoint(context, {
+           title: _t.html('modes.add_point.title'),
+           button: 'point',
+           description: _t.html('modes.add_point.description'),
+           preset: _mainPresetIndex.item('point'),
+           key: '1'
+         }), modeAddLine(context, {
+           title: _t.html('modes.add_line.title'),
+           button: 'line',
+           description: _t.html('modes.add_line.description'),
+           preset: _mainPresetIndex.item('line'),
+           key: '2'
+         }), modeAddArea(context, {
+           title: _t.html('modes.add_area.title'),
+           button: 'area',
+           description: _t.html('modes.add_area.description'),
+           preset: _mainPresetIndex.item('area'),
+           key: '3'
+         })];
+
+         function enabled() {
+           return osmEditable();
          }
 
-         function combinedEntityExtent() {
-           return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+         function osmEditable() {
+           return context.editable();
          }
 
-         address.entityIDs = function (val) {
-           if (!arguments.length) return _entityIDs;
-           _entityIDs = val;
-           return address;
-         };
+         modes.forEach(function (mode) {
+           context.keybinding().on(mode.key, function () {
+             if (!enabled()) return;
 
-         address.tags = function (tags) {
-           _tags = tags;
-           updateTags(tags);
-         };
+             if (mode.id === context.mode().id) {
+               context.enter(modeBrowse(context));
+             } else {
+               context.enter(mode);
+             }
+           });
+         });
 
-         address.focus = function () {
-           var node = _wrap.selectAll('input').node();
+         tool.render = function (selection) {
+           var wrap = selection.append('div').attr('class', 'joined').style('display', 'flex');
 
-           if (node) node.focus();
-         };
+           var debouncedUpdate = debounce(update, 500, {
+             leading: true,
+             trailing: true
+           });
 
-         return utilRebind(address, dispatch$1, 'on');
-       }
+           context.map().on('move.modes', debouncedUpdate).on('drawn.modes', debouncedUpdate);
+           context.on('enter.modes', update);
+           update();
 
-       function uiFieldCycleway(field, context) {
-         var dispatch$1 = dispatch('change');
-         var items = select(null);
-         var wrap = select(null);
+           function update() {
+             var buttons = wrap.selectAll('button.add-button').data(modes, function (d) {
+               return d.id;
+             }); // exit
 
-         var _tags;
+             buttons.exit().remove(); // enter
 
-         function cycleway(selection) {
-           function stripcolon(s) {
-             return s.replace(':', '');
-           }
+             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
 
-           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 currMode = context.mode().id;
+               if (/^draw/.test(currMode)) return;
 
-           wrap.selectAll('.preset-input-cycleway').on('change', change).on('blur', change);
-         }
+               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
 
-         function change(d3_event, key) {
-           var newValue = context.cleanTagValue(utilGetSetValue(select(this))); // don't override multiple values with blank string
+             if (buttons.enter().size() || buttons.exit().size()) {
+               context.ui().checkOverflow('.top-toolbar', true);
+             } // update
 
-           if (!newValue && (Array.isArray(_tags.cycleway) || Array.isArray(_tags[key]))) return;
 
-           if (newValue === 'none' || newValue === '') {
-             newValue = undefined;
+             buttons = buttons.merge(buttonsEnter).classed('disabled', function (d) {
+               return !enabled();
+             }).classed('active', function (d) {
+               return context.mode() && context.mode().button === d.button;
+             });
            }
+         };
 
-           var otherKey = key === 'cycleway:left' ? 'cycleway:right' : 'cycleway:left';
-           var otherValue = typeof _tags.cycleway === 'string' ? _tags.cycleway : _tags[otherKey];
+         return tool;
+       }
 
-           if (otherValue && Array.isArray(otherValue)) {
-             // we must always have an explicit value for comparison
-             otherValue = otherValue[0];
-           }
+       function uiToolNotes(context) {
+         var tool = {
+           id: 'notes',
+           label: _t.html('modes.add_note.label')
+         };
+         var mode = modeAddNote(context);
 
-           if (otherValue === 'none' || otherValue === '') {
-             otherValue = undefined;
-           }
+         function enabled() {
+           return notesEnabled() && notesEditable();
+         }
 
-           var tag = {}; // If the left and right tags match, use the cycleway tag to tag both
-           // sides the same way
+         function notesEnabled() {
+           var noteLayer = context.layers().layer('notes');
+           return noteLayer && noteLayer.enabled();
+         }
 
-           if (newValue === otherValue) {
-             tag = {
-               cycleway: newValue,
-               'cycleway:left': undefined,
-               'cycleway:right': undefined
-             };
+         function notesEditable() {
+           var mode = context.mode();
+           return context.map().notesEditable() && mode && mode.id !== 'save';
+         }
+
+         context.keybinding().on(mode.key, function () {
+           if (!enabled()) return;
+
+           if (mode.id === context.mode().id) {
+             context.enter(modeBrowse(context));
            } else {
-             // Always set both left and right as changing one can affect the other
-             tag = {
-               cycleway: undefined
-             };
-             tag[key] = newValue;
-             tag[otherKey] = otherValue;
+             context.enter(mode);
            }
+         });
 
-           dispatch$1.call('change', this, tag);
-         }
-
-         cycleway.options = function () {
-           return Object.keys(field.strings.options).map(function (option) {
-             return {
-               title: field.t('options.' + option + '.description'),
-               value: option
-             };
+         tool.render = function (selection) {
+           var debouncedUpdate = debounce(update, 500, {
+             leading: true,
+             trailing: true
            });
-         };
 
-         cycleway.tags = function (tags) {
-           _tags = tags; // If cycleway is set, use that instead of individual values
+           context.map().on('move.notes', debouncedUpdate).on('drawn.notes', debouncedUpdate);
+           context.on('enter.notes', update);
+           update();
 
-           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 = [];
+           function update() {
+             var showNotes = notesEnabled();
+             var data = showNotes ? [mode] : [];
+             var buttons = selection.selectAll('button.add-button').data(data, function (d) {
+               return d.id;
+             }); // exit
 
-               if (Array.isArray(tags.cycleway)) {
-                 vals = vals.concat(tags.cycleway);
-               }
+             buttons.exit().remove(); // enter
 
-               if (Array.isArray(tags[d])) {
-                 vals = vals.concat(tags[d]);
+             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
+
+               var currMode = context.mode().id;
+               if (/^draw/.test(currMode)) return;
+
+               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
 
-               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).classed('disabled', function (d) {
+               return !enabled();
+             }).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();
+         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 utilRebind(cycleway, dispatch$1, 'on');
+         return tool;
        }
 
-       function uiFieldLanes(field, context) {
-         var dispatch$1 = dispatch('change');
-         var LANE_WIDTH = 40;
-         var LANE_HEIGHT = 200;
-         var _entityIDs = [];
+       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;
 
-         function lanes(selection) {
-           var lanesData = context.entity(_entityIDs[0]).lanes();
+         function isSaving() {
+           var mode = context.mode();
+           return mode && mode.id === 'save';
+         }
 
-           if (!context.container().select('.inspector-wrap.inspector-hidden').empty() || !selection.node().parentNode) {
-             selection.call(lanes.off);
-             return;
+         function isDisabled() {
+           return _numChanges === 0 || isSaving();
+         }
+
+         function save(d3_event) {
+           d3_event.preventDefault();
+
+           if (!context.inIntro() && !isSaving() && history.hasChanges()) {
+             context.enter(modeSave(context));
            }
+         }
 
-           var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
-           wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
-           var surface = wrap.selectAll('.surface').data([0]);
-           var d = utilGetDimensions(wrap);
-           var freeSpace = d[0] - lanesData.lanes.length * LANE_WIDTH * 1.5 + LANE_WIDTH * 0.5;
-           surface = surface.enter().append('svg').attr('width', d[0]).attr('height', 300).attr('class', 'surface').merge(surface);
-           var lanesSelection = surface.selectAll('.lanes').data([0]);
-           lanesSelection = lanesSelection.enter().append('g').attr('class', 'lanes').merge(lanesSelection);
-           lanesSelection.attr('transform', function () {
-             return 'translate(' + freeSpace / 2 + ', 0)';
-           });
-           var lane = lanesSelection.selectAll('.lane').data(lanesData.lanes);
-           lane.exit().remove();
-           var enter = lane.enter().append('g').attr('class', 'lane');
-           enter.append('g').append('rect').attr('y', 50).attr('width', LANE_WIDTH).attr('height', LANE_HEIGHT);
-           enter.append('g').attr('class', 'forward').append('text').attr('y', 40).attr('x', 14).html('▲');
-           enter.append('g').attr('class', 'bothways').append('text').attr('y', 40).attr('x', 14).html('▲▼');
-           enter.append('g').attr('class', 'backward').append('text').attr('y', 40).attr('x', 14).html('▼');
-           lane = lane.merge(enter);
-           lane.attr('transform', function (d) {
-             return 'translate(' + LANE_WIDTH * d.index * 1.5 + ', 0)';
-           });
-           lane.select('.forward').style('visibility', function (d) {
-             return d.direction === 'forward' ? 'visible' : 'hidden';
-           });
-           lane.select('.bothways').style('visibility', function (d) {
-             return d.direction === 'bothways' ? 'visible' : 'hidden';
-           });
-           lane.select('.backward').style('visibility', function (d) {
-             return d.direction === 'backward' ? 'visible' : 'hidden';
-           });
+         function bgColor() {
+           var step;
+
+           if (_numChanges === 0) {
+             return null;
+           } else if (_numChanges <= 50) {
+             step = _numChanges / 50;
+             return d3_interpolateRgb('#fff', '#ff8')(step); // white -> yellow
+           } else {
+             step = Math.min((_numChanges - 50) / 50, 1.0);
+             return d3_interpolateRgb('#ff8', '#f88')(step); // yellow -> red
+           }
          }
 
-         lanes.entityIDs = function (val) {
-           _entityIDs = val;
-         };
+         function updateCount() {
+           var val = history.difference().summary().length;
+           if (val === _numChanges) return;
+           _numChanges = val;
 
-         lanes.tags = function () {};
+           if (tooltipBehavior) {
+             tooltipBehavior.title(_t.html(_numChanges > 0 ? 'save.help' : 'save.no_changes')).keys([key]);
+           }
 
-         lanes.focus = function () {};
+           if (button) {
+             button.classed('disabled', isDisabled()).style('background', bgColor());
+             button.select('span.count').html(_numChanges);
+           }
+         }
 
-         lanes.off = function () {};
+         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 utilRebind(lanes, dispatch$1, 'on');
-       }
-       uiFieldLanes.supportsMultiselection = false;
+             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'))();
+             }
 
-       var _languagesArray = [];
-       function uiFieldLocalized(field, context) {
-         var dispatch$1 = dispatch('change', 'input');
-         var wikipedia = services.wikipedia;
-         var input = select(null);
-         var localizedInputs = select(null);
+             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());
 
-         var _countryCode;
+               if (isSaving()) {
+                 button.call(tooltipBehavior.hide);
+               }
+             }
+           });
+         };
 
-         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.
+         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;
+       }
 
-         _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
+       function uiToolSidebarToggle(context) {
+         var tool = {
+           id: 'sidebar_toggle',
+           label: _t.html('toolbar.inspect')
+         };
 
-         var langCombo = uiCombobox(context, 'localized-lang').fetcher(fetchLanguages).minItems(0);
-         var brandCombo = uiCombobox(context, 'localized-brand').canAutocomplete(false).minItems(1);
+         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')));
+         };
 
-         var _selection = select(null);
+         return tool;
+       }
 
-         var _multilingual = [];
+       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')
+         }];
 
-         var _buttonTip = uiTooltip().title(_t.html('translate.translate')).placement('left');
+         function editable() {
+           return context.mode() && context.mode().id !== 'save' && context.map().editableDataEnabled(true
+           /* ignore min zoom */
+           );
+         }
 
-         var _wikiTitles;
+         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();
 
-         var _entityIDs = [];
+             if (editable() && annotation) {
+               d.action();
+             }
 
-         function loadLanguagesArray(dataLanguages) {
-           if (_languagesArray.length !== 0) return; // some conversion is needed to ensure correct OSM tags are used
+             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)();
+             }
 
-           var replacements = {
-             sr: 'sr-Cyrl',
-             // in OSM, `sr` implies Cyrillic
-             'sr-Cyrl': false // `sr-Cyrl` isn't used in OSM
+             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 debouncedUpdate = debounce(update, 500, {
+             leading: true,
+             trailing: true
+           });
 
-           for (var code in dataLanguages) {
-             if (replacements[code] === false) continue;
-             var metaCode = code;
-             if (replacements[code]) metaCode = replacements[code];
+           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);
 
-             _languagesArray.push({
-               localName: _mainLocalizer.languageName(metaCode, {
-                 localOnly: true
-               }),
-               nativeName: dataLanguages[metaCode].nativeName,
-               code: code,
-               label: _mainLocalizer.languageName(metaCode)
+           function update() {
+             buttons.classed('disabled', function (d) {
+               return !editable() || !d.annotation();
+             }).each(function () {
+               var selection = select(this);
+
+               if (!selection.select('.tooltip.in').empty()) {
+                 selection.call(tooltipBehavior.updateContent);
+               }
              });
            }
-         }
-
-         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;
-
-             var original = context.graph().base().entities[_entityIDs[0]];
+         };
 
-             var hasOriginalName = original && entity.tags.name && entity.tags.name === original.tags.name; // if the name was already edited manually then allow further editing
+         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);
+         };
 
-             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 uiTopToolbar(context) {
+         var sidebarToggle = uiToolSidebarToggle(context),
+             modes = uiToolOldDrawModes(context),
+             notes = uiToolNotes(context),
+             undoRedo = uiToolUndoRedo(context),
+             save = uiToolSave(context);
 
-             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 notesEnabled() {
+           var noteLayer = context.layers().layer('notes');
+           return noteLayer && noteLayer.enabled();
+         }
 
-             return isSuggestion && !showsBrand;
+         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;
+             }
            });
 
-           field.locked(isLocked);
-         } // update _multilingual, maintaining the existing order
-
-
-         function calcMultilingual(tags) {
-           var existingLangsOrdered = _multilingual.map(function (item) {
-             return item.lang;
+           var debouncedUpdate = debounce(update, 500, {
+             leading: true,
+             trailing: true
            });
 
-           var existingLangs = new Set(existingLangsOrdered.filter(Boolean));
+           context.layers().on('change.topToolbar', debouncedUpdate);
+           update();
 
-           for (var k in tags) {
-             var m = k.match(/^(.*):(.+)$/);
+           function update() {
+             var tools = [sidebarToggle, 'spacer', modes];
+             tools.push('spacer');
 
-             if (m && m[1] === field.key && m[2]) {
-               var item = {
-                 lang: m[2],
-                 value: tags[k]
-               };
+             if (notesEnabled()) {
+               tools = tools.concat([notes, 'spacer']);
+             }
 
-               if (existingLangs.has(item.lang)) {
-                 // update the value
-                 _multilingual[existingLangsOrdered.indexOf(item.lang)].value = item.value;
-                 existingLangs["delete"](item.lang);
-               } else {
-                 _multilingual.push(item);
+             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;
+             });
            }
-
-           _multilingual = _multilingual.filter(function (item) {
-             return !item.lang || !existingLangs.has(item.lang);
-           });
          }
 
-         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
-
-           wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
-           input = wrap.selectAll('.localized-main').data([0]); // enter/update
-
-           input = input.enter().append('input').attr('type', 'text').attr('id', field.domId).attr('class', 'localized-main').call(utilNoAuto).merge(input);
-
-           if (preset && field.id === 'name') {
-             var pTag = preset.id.split('/', 2);
-             var pKey = pTag[0];
-             var pValue = pTag[1];
+         return topToolbar;
+       }
 
-             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..
+       var sawVersion = null;
+       var isNewVersion = false;
+       var isNewUser = false;
+       function uiVersion(context) {
+         var currVersion = context.version;
+         var matchedVersion = currVersion.match(/\d+\.\d+\.\d+.*/);
 
-               if (allSuggestions.length && goodSuggestions.length) {
-                 input.on('blur.localized', checkBrandOnBlur).call(brandCombo.fetcher(fetchBrandNames(preset, allSuggestions)).on('accept', acceptBrand).on('cancel', cancelBrand));
-               }
-             }
+         if (sawVersion === null && matchedVersion !== null) {
+           if (corePreferences('sawVersion')) {
+             isNewUser = false;
+             isNewVersion = corePreferences('sawVersion') !== currVersion && currVersion.indexOf('-') === -1;
+           } else {
+             isNewUser = true;
+             isNewVersion = true;
            }
 
-           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);
+           corePreferences('sawVersion', currVersion);
+           sawVersion = currVersion;
+         }
 
-           if (_tags && !_multilingual.length) {
-             calcMultilingual(_tags);
-           }
+         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
 
-           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.
+           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 checkBrandOnBlur() {
-             var latest = _entityIDs.length === 1 && context.hasEntity(_entityIDs[0]);
-             if (!latest) return; // deleting the entity blurred the field?
+       function uiZoom(context) {
+         var zooms = [{
+           id: 'zoom-in',
+           icon: 'iD-icon-plus',
+           title: _t.html('zoom.in'),
+           action: zoomIn,
+           disabled: function disabled() {
+             return !context.map().canZoomIn();
+           },
+           disabledTitle: _t.html('zoom.disabled.in'),
+           key: '+'
+         }, {
+           id: 'zoom-out',
+           icon: 'iD-icon-minus',
+           title: _t.html('zoom.out'),
+           action: zoomOut,
+           disabled: function disabled() {
+             return !context.map().canZoomOut();
+           },
+           disabledTitle: _t.html('zoom.disabled.out'),
+           key: '-'
+         }];
 
-             var preset = _mainPresetIndex.match(latest, context.graph());
-             if (preset && preset.suggestion) return; // already accepted
+         function zoomIn(d3_event) {
+           if (d3_event.shiftKey) return;
+           d3_event.preventDefault();
+           context.map().zoomIn();
+         }
 
-             var name = utilGetSetValue(input).trim();
-             var matched = allSuggestions.filter(function (s) {
-               return name === s.name();
-             });
+         function zoomOut(d3_event) {
+           if (d3_event.shiftKey) return;
+           d3_event.preventDefault();
+           context.map().zoomOut();
+         }
 
-             if (matched.length === 1) {
-               acceptBrand({
-                 suggestion: matched[0]
-               });
-             } else {
-               cancelBrand();
-             }
-           }
+         function zoomInFurther(d3_event) {
+           if (d3_event.shiftKey) return;
+           d3_event.preventDefault();
+           context.map().zoomInFurther();
+         }
 
-           function acceptBrand(d) {
-             var entity = _entityIDs.length === 1 && context.hasEntity(_entityIDs[0]);
+         function zoomOutFurther(d3_event) {
+           if (d3_event.shiftKey) return;
+           d3_event.preventDefault();
+           context.map().zoomOutFurther();
+         }
 
-             if (!d || !entity) {
-               cancelBrand();
-               return;
+         return function (selection) {
+           var tooltipBehavior = uiTooltip().placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left').title(function (d) {
+             if (d.disabled()) {
+               return d.disabledTitle;
              }
 
-             var tags = entity.tags;
-             var geometry = entity.geometry(context.graph());
-             var removed = preset.unsetTags(tags, geometry);
-
-             for (var k in tags) {
-               tags[k] = removed[k]; // set removed tags to `undefined`
+             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)();
              }
 
-             tags = d.suggestion.setTags(tags, geometry);
-             utilGetSetValue(input, tags.name);
-             dispatch$1.call('change', this, tags);
-           } // user hit escape
+             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 updateButtonStates() {
+             buttons.classed('disabled', function (d) {
+               return d.disabled();
+             }).each(function () {
+               var selection = select(this);
 
-           function cancelBrand() {
-             var name = utilGetSetValue(input);
-             dispatch$1.call('change', this, {
-               name: name
+               if (!selection.select('.tooltip.in').empty()) {
+                 selection.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
+           updateButtonStates();
+           context.map().on('move.uiZoom', updateButtonStates);
+         };
+       }
 
-                     };
-                     results.push(obj);
-                   }
-                 }
+       function uiZoomToSelection(context) {
+         function isDisabled() {
+           var mode = context.mode();
+           return !mode || !mode.zoomToSelected;
+         }
 
-                 results.sort(function (a, b) {
-                   return a.dist - b.dist;
-                 });
-               }
+         var _lastPointerUpType;
 
-               results = results.slice(0, 10);
-               callback(results);
-             };
-           }
+         function pointerup(d3_event) {
+           _lastPointerUpType = d3_event.pointerType;
+         }
 
-           function addNew(d3_event) {
-             d3_event.preventDefault();
-             if (field.locked()) return;
-             var defaultLang = _mainLocalizer.languageCode().toLowerCase();
+         function click(d3_event) {
+           d3_event.preventDefault();
 
-             var langExists = _multilingual.find(function (datum) {
-               return datum.lang === defaultLang;
-             });
+           if (isDisabled()) {
+             if (_lastPointerUpType === 'touch' || _lastPointerUpType === 'pen') {
+               context.ui().flash.duration(2000).iconName('#iD-icon-framed-dot').iconClass('disabled').label(_t.html('inspector.zoom_to.no_selection'))();
+             }
+           } else {
+             var mode = context.mode();
 
-             var isLangEn = defaultLang.indexOf('en') > -1;
+             if (mode && mode.zoomToSelected) {
+               mode.zoomToSelected();
+             }
+           }
 
-             if (isLangEn || langExists) {
-               defaultLang = '';
-               langExists = _multilingual.find(function (datum) {
-                 return datum.lang === defaultLang;
-               });
+           _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');
              }
 
-             if (!langExists) {
-               // prepend the value so it appears at the top
-               _multilingual.unshift({
-                 lang: defaultLang,
-                 value: ''
-               });
+             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);
 
-               localizedInputs.call(renderMultilingual);
+           function setEnabledState() {
+             button.classed('disabled', isDisabled());
+
+             if (!button.select('.tooltip.in').empty()) {
+               button.call(tooltipBehavior.updateContent);
              }
            }
 
-           function change(onInput) {
-             return function (d3_event) {
-               if (field.locked()) {
-                 d3_event.preventDefault();
-                 return;
-               }
+           context.on('enter.uiZoomToSelection', setEnabledState);
+           setEnabledState();
+         };
+       }
 
-               var val = utilGetSetValue(select(this));
-               if (!onInput) val = context.cleanTagValue(val); // don't override multiple values with blank string
+       function uiPane(id, context) {
+         var _key;
 
-               if (!val && Array.isArray(_tags[field.key])) return;
-               var t = {};
-               t[field.key] = val || undefined;
-               dispatch$1.call('change', this, t, onInput);
-             };
-           }
-         }
+         var _label = '';
+         var _description = '';
+         var _iconName = '';
 
-         function key(lang) {
-           return field.key + ':' + lang;
-         }
+         var _sections; // array of uiSection objects
 
-         function changeLang(d3_event, d) {
-           var tags = {}; // make sure unrecognized suffixes are lowercase - #7156
 
-           var lang = utilGetSetValue(select(this)).toLowerCase();
+         var _paneSelection = select(null);
 
-           var language = _languagesArray.find(function (d) {
-             return d.label.toLowerCase() === lang || d.localName && d.localName.toLowerCase() === lang || d.nativeName && d.nativeName.toLowerCase() === lang;
-           });
+         var _paneTooltip;
 
-           if (language) lang = language.code;
+         var pane = {
+           id: id
+         };
 
-           if (d.lang && d.lang !== lang) {
-             tags[key(d.lang)] = undefined;
-           }
+         pane.label = function (val) {
+           if (!arguments.length) return _label;
+           _label = val;
+           return pane;
+         };
 
-           var newKey = lang && context.cleanTagKey(key(lang));
-           var value = utilGetSetValue(select(this.parentNode).selectAll('.localized-value'));
+         pane.key = function (val) {
+           if (!arguments.length) return _key;
+           _key = val;
+           return pane;
+         };
 
-           if (newKey && value) {
-             tags[newKey] = value;
-           } else if (newKey && _wikiTitles && _wikiTitles[d.lang]) {
-             tags[newKey] = _wikiTitles[d.lang];
-           }
+         pane.description = function (val) {
+           if (!arguments.length) return _description;
+           _description = val;
+           return pane;
+         };
 
-           d.lang = lang;
-           dispatch$1.call('change', this, tags);
-         }
+         pane.iconName = function (val) {
+           if (!arguments.length) return _iconName;
+           _iconName = val;
+           return pane;
+         };
 
-         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.sections = function (val) {
+           if (!arguments.length) return _sections;
+           _sections = val;
+           return pane;
+         };
 
-           if (!value && Array.isArray(d.value)) return;
-           var t = {};
-           t[key(d.lang)] = value;
-           d.value = value;
-           dispatch$1.call('change', this, t);
+         pane.selection = function () {
+           return _paneSelection;
+         };
+
+         function hidePane() {
+           context.ui().togglePanes();
          }
 
-         function fetchLanguages(value, cb) {
-           var v = value.toLowerCase(); // show the user's language first
+         pane.togglePane = function (d3_event) {
+           if (d3_event) d3_event.preventDefault();
 
-           var langCodes = [_mainLocalizer.localeCode(), _mainLocalizer.languageCode()];
+           _paneTooltip.hide();
 
-           if (_countryCode && _territoryLanguages[_countryCode]) {
-             langCodes = langCodes.concat(_territoryLanguages[_countryCode]);
+           context.ui().togglePanes(!_paneSelection.classed('shown') ? _paneSelection : undefined);
+         };
+
+         pane.renderToggleButton = function (selection) {
+           if (!_paneTooltip) {
+             _paneTooltip = uiTooltip().placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left').title(_description).keys([_key]);
            }
 
-           var langItems = [];
-           langCodes.forEach(function (code) {
-             var langItem = _languagesArray.find(function (item) {
-               return item.code === code;
+           selection.append('button').on('click', pane.togglePane).call(svgIcon('#' + _iconName, 'light')).call(_paneTooltip);
+         };
+
+         pane.renderContent = function (selection) {
+           // override to fully customize content
+           if (_sections) {
+             _sections.forEach(function (section) {
+               selection.call(section.render);
              });
+           }
+         };
 
-             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
-             };
-           }));
-         }
+         pane.renderPane = function (selection) {
+           _paneSelection = selection.append('div').attr('class', 'fillL map-pane hide ' + id + '-pane').attr('pane', id);
 
-         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();
+           var heading = _paneSelection.append('div').attr('class', 'pane-heading');
+
+           heading.append('h2').html(_label);
+           heading.append('button').on('click', hidePane).call(svgIcon('#iD-icon-close'));
 
-               if (!d.lang || !d.value) {
-                 _multilingual.splice(index, 1);
+           _paneSelection.append('div').attr('class', 'pane-content').call(pane.renderContent);
 
-                 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) {
-             var langItem = _languagesArray.find(function (item) {
-               return item.code === d.lang;
-             });
+           if (_key) {
+             context.keybinding().on(_key, pane.togglePane);
+           }
+         };
 
-             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);
-           });
-         }
+         return pane;
+       }
 
-         localized.tags = function (tags) {
-           _tags = tags; // Fetch translations from wikipedia
+       function uiSectionBackgroundDisplayOptions(context) {
+         var section = uiSection('background-display-options', context).label(_t.html('background.display_options')).disclosureContent(renderDisclosureContent);
 
-           if (typeof tags.wikipedia === 'string' && !_wikiTitles) {
-             _wikiTitles = {};
-             var wm = tags.wikipedia.match(/([^:]+):(.+)/);
+         var _detected = utilDetect();
 
-             if (wm && wm[0] && wm[1]) {
-               wikipedia.translations(wm[1], wm[2], function (err, d) {
-                 if (err || !d) return;
-                 _wikiTitles = d;
-               });
-             }
-           }
+         var _storedOpacity = corePreferences('background-opacity');
 
-           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 _minVal = 0;
 
-           _selection.call(localized);
-         };
+         var _maxVal = _detected.cssfilters ? 3 : 1;
 
-         localized.focus = function () {
-           input.node().focus();
-         };
+         var _sliders = _detected.cssfilters ? ['brightness', 'contrast', 'saturation', 'sharpness'] : ['brightness'];
 
-         localized.entityIDs = function (val) {
-           if (!arguments.length) return _entityIDs;
-           _entityIDs = val;
-           _multilingual = [];
-           loadCountryCode();
-           return localized;
+         var _options = {
+           brightness: _storedOpacity !== null ? +_storedOpacity : 1,
+           contrast: 1,
+           saturation: 1,
+           sharpness: 1
          };
 
-         function loadCountryCode() {
-           var extent = combinedEntityExtent();
-           var countryCode = extent && iso1A2Code(extent.center());
-           _countryCode = countryCode && countryCode.toLowerCase();
+         function clamp(x, min, max) {
+           return Math.max(min, Math.min(x, max));
          }
 
-         function combinedEntityExtent() {
-           return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+         function updateValue(d, val) {
+           val = clamp(val, _minVal, _maxVal);
+           _options[d] = val;
+           context.background()[d](val);
+
+           if (d === 'brightness') {
+             corePreferences('background-opacity', val);
+           }
+
+           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('div').attr('class', function (d) {
+             return 'display-control display-control-' + d;
+           });
+           slidersEnter.append('h5').html(function (d) {
+             return _t.html('background.' + d);
+           }).append('span').attr('class', function (d) {
+             return 'display-option-value display-option-value-' + d;
+           });
+           var sildersControlEnter = slidersEnter.append('div').attr('class', 'control-wrap');
+           sildersControlEnter.append('input').attr('class', function (d) {
+             return 'display-option-input display-option-input-' + d;
+           }).attr('type', 'range').attr('min', _minVal).attr('max', _maxVal).attr('step', '0.05').on('input', function (d3_event, d) {
+             var val = select(this).property('value');
 
-         var _tags;
+             if (!val && d3_event && d3_event.target) {
+               val = d3_event.target.value;
+             }
 
-         var _isImperial;
+             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
 
-         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('href', '#').html(_t.html('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').html(function (d) {
+             return Math.floor(_options[d] * 100) + '%';
+           });
+           container.selectAll('.display-option-reset').classed('disabled', function (d) {
+             return _options[d] === 1;
+           }); // first time only, set brightness if needed
+
+           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').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 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').html(_t.html('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').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 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').html(_t.html('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
+           }).on('change', change);
+           label.append('span').html(function (d) {
+             return d.label();
+           });
+           enter.filter(function (d) {
+             return d.id === 'custom';
+           }).append('button').attr('class', 'layer-browse').call(uiTooltip().title(_t.html('settings.custom_background.tooltip')).placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left')).on('click', function (d3_event) {
+             d3_event.preventDefault();
+             editCustom();
+           }).call(svgIcon('#iD-icon-more'));
+           enter.filter(function (d) {
+             return d.best();
+           }).append('div').attr('class', 'best').call(uiTooltip().title(_t.html('background.best_imagery')).placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left')).append('span').html('&#9733;');
+           layerList.call(updateLayerSelections);
+         }
 
-           var 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
+         function updateLayerSelections(selection) {
+           function active(d) {
+             return context.background().showsLayer(d);
+           }
 
-           typeItem = typeItem.merge(typeEnter);
+           selection.selectAll('li').classed('active', active).classed('switch', function (d) {
+             return d.id === previousBackgroundID();
+           }).call(setTooltips).selectAll('input').property('checked', active);
+         }
 
-           if (typeField) {
-             typeItem.selectAll('.structure-input-type-wrap').call(typeField.render);
-           } // Layer
+         function chooseBackground(d) {
+           if (d.id === 'custom' && !d.template()) {
+             return editCustom();
+           }
 
+           var previousBackground = context.background().baseLayerSource();
+           corePreferences('background-last-used-toggle', previousBackground.id);
+           corePreferences('background-last-used', d.id);
+           context.background().baseLayerSource(d);
+         }
 
-           if (layer && showLayer) {
-             if (!layerField) {
-               layerField = uiField(context, layer, _entityIDs, {
-                 wrap: false
-               }).on('change', changeLayer);
-             }
+         function customChanged(d) {
+           if (d && d.template) {
+             _customSource.template(d.template);
 
-             layerField.tags(tags);
-             field.keys = utilArrayUnion(field.keys, ['layer']);
+             chooseBackground(_customSource);
            } else {
-             layerField = null;
-             field.keys = field.keys.filter(function (k) {
-               return k !== 'layer';
-             });
+             _customSource.template('');
+
+             chooseBackground(context.background().findSource('none'));
            }
+         }
 
-           var layerItem = list.selectAll('.structure-layer-item').data(layerField ? [layerField] : []); // Exit
+         function editCustom() {
+           context.container().call(_settingsCustomBackground);
+         }
 
-           layerItem.exit().remove(); // Enter
+         context.background().on('change.background_list', function () {
+           _backgroundList.call(updateLayerSelections);
+         });
+         context.map().on('move.background_list', debounce(function () {
+           // layers in-view may have changed due to map move
+           window.requestIdleCallback(section.reRender);
+         }, 1000));
+         return section;
+       }
 
-           var 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 uiSectionBackgroundOffset(context) {
+         var section = uiSection('background-offset', context).label(_t.html('background.fix_misalignment')).disclosureContent(renderDisclosureContent).expandedByDefault(false);
 
-           layerItem = layerItem.merge(layerEnter);
+         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-           if (layerField) {
-             layerItem.selectAll('.structure-input-layer-wrap').call(layerField.render);
-           }
+         var _directions = [['top', [0, -0.5]], ['left', [-0.5, 0]], ['right', [0.5, 0]], ['bottom', [0, 0.5]]];
+
+         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 changeType(t, onInput) {
-           var key = selectedKey();
-           if (!key) return;
-           var val = t[key];
+         function resetOffset() {
+           context.background().offset([0, 0]);
+           updateValue();
+         }
 
-           if (val !== 'no') {
-             _oldType[key] = val;
-           }
+         function nudge(d) {
+           context.background().nudge(d, context.map().zoom());
+           updateValue();
+         }
 
-           if (field.type === 'structureRadio') {
-             // remove layer if it should not be set
-             if (val === 'no' || key !== 'bridge' && key !== 'tunnel' || key === 'tunnel' && val === 'building_passage') {
-               t.layer = undefined;
-             } // add layer if it should be set
+         function inputOffset() {
+           var input = select(this);
+           var d = input.node().value;
+           if (d === '') return resetOffset();
+           d = d.replace(/;/g, ',').split(',').map(function (n) {
+             // if n is NaN, it will always get mapped to false.
+             return !isNaN(n) && n;
+           });
 
+           if (d.length !== 2 || !d[0] || !d[1]) {
+             input.classed('error', true);
+             return;
+           }
 
-             if (t.layer === undefined) {
-               if (key === 'bridge' && val !== 'no') {
-                 t.layer = '1';
-               }
+           context.background().offset(geoMetersToOffset(d));
+           updateValue();
+         }
 
-               if (key === 'tunnel' && val !== 'no' && val !== 'building_passage') {
-                 t.layer = '-1';
-               }
-             }
+         function dragOffset(d3_event) {
+           if (d3_event.button !== 0) return;
+           var origin = [d3_event.clientX, d3_event.clientY];
+           var pointerId = d3_event.pointerId || 'mouse';
+           context.container().append('div').attr('class', 'nudge-surface');
+           select(window).on(_pointerPrefix + 'move.drag-bg-offset', pointermove).on(_pointerPrefix + 'up.drag-bg-offset', pointerup);
+
+           if (_pointerPrefix === 'pointer') {
+             select(window).on('pointercancel.drag-bg-offset', pointerup);
            }
 
-           dispatch$1.call('change', this, t, onInput);
-         }
+           function pointermove(d3_event) {
+             if (pointerId !== (d3_event.pointerId || 'mouse')) return;
+             var latest = [d3_event.clientX, d3_event.clientY];
+             var d = [-(origin[0] - latest[0]) / 4, -(origin[1] - latest[1]) / 4];
+             origin = latest;
+             nudge(d);
+           }
 
-         function changeLayer(t, onInput) {
-           if (t.layer === '0') {
-             t.layer = undefined;
+           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);
            }
+         }
 
-           dispatch$1.call('change', this, t, onInput);
+         function renderDisclosureContent(selection) {
+           var container = selection.selectAll('.nudge-container').data([0]);
+           var containerEnter = container.enter().append('div').attr('class', 'nudge-container');
+           containerEnter.append('div').attr('class', 'nudge-instructions').html(_t.html('background.offset'));
+           var nudgeWrapEnter = containerEnter.append('div').attr('class', 'nudge-controls-wrap');
+           var nudgeEnter = nudgeWrapEnter.append('div').attr('class', 'nudge-outer-rect').on(_pointerPrefix + 'down', dragOffset);
+           nudgeEnter.append('div').attr('class', 'nudge-inner-rect').append('input').attr('type', 'text').on('change', inputOffset);
+           nudgeWrapEnter.append('div').selectAll('button').data(_directions).enter().append('button').attr('class', function (d) {
+             return d[0] + ' nudge';
+           }).on('click', function (d3_event, d) {
+             nudge(d[1]);
+           });
+           nudgeWrapEnter.append('button').attr('title', _t('background.reset')).attr('class', 'nudge-reset disabled').on('click', function (d3_event) {
+             d3_event.preventDefault();
+             resetOffset();
+           }).call(svgIcon('#iD-icon-' + (_mainLocalizer.textDirection() === 'rtl' ? 'redo' : 'undo')));
+           updateValue();
          }
 
-         function changeRadio() {
-           var t = {};
-           var activeKey;
+         context.background().on('change.backgroundOffset-update', updateValue);
+         return section;
+       }
 
-           if (field.key) {
-             t[field.key] = undefined;
-           }
+       function uiSectionOverlayList(context) {
+         var section = uiSection('overlay-list', context).label(_t.html('background.overlays')).disclosureContent(renderDisclosureContent);
 
-           radios.each(function (d) {
-             var active = select(this).property('checked');
-             if (active) activeKey = d;
+         var _overlayList = select(null);
 
-             if (field.key) {
-               if (active) t[field.key] = d;
-             } else {
-               var val = _oldType[activeKey] || 'yes';
-               t[d] = active ? val : undefined;
+         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 (description || isOverflowing) {
+               item.call(uiTooltip().placement(placement).title(description || d.name()));
              }
            });
+         }
 
-           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 updateLayerSelections(selection) {
+           function active(d) {
+             return context.background().showsLayer(d);
            }
 
-           dispatch$1.call('change', this, t);
+           selection.selectAll('li').classed('active', active).call(setTooltips).selectAll('input').property('checked', active);
          }
 
-         radio.tags = function (tags) {
-           radios.property('checked', function (d) {
-             if (field.key) {
-               return tags[field.key] === d;
-             }
-
-             return !!(typeof tags[d] === 'string' && tags[d].toLowerCase() !== 'no');
-           });
-
-           function isMixed(d) {
-             if (field.key) {
-               return Array.isArray(tags[field.key]) && tags[field.key].includes(d);
-             }
+         function chooseOverlay(d3_event, d) {
+           d3_event.preventDefault();
+           context.background().toggleOverlayLayer(d);
 
-             return Array.isArray(tags[d]);
-           }
+           _overlayList.call(updateLayerSelections);
 
-           labels.classed('active', function (d) {
-             if (field.key) {
-               return Array.isArray(tags[field.key]) && tags[field.key].includes(d) || tags[field.key] === d;
-             }
+           document.activeElement.blur();
+         }
 
-             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;
+         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();
            });
-           var selection = radios.filter(function () {
-             return this.checked;
+           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 (selection.empty()) {
-             placeholder.html(_t.html('inspector.none'));
-           } else {
-             placeholder.html(selection.attr('value'));
-             _oldType[selection.datum()] = tags[selection.datum()];
+           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 (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';
-             }
+         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);
 
-             wrap.call(structureExtras, tags);
-           }
-         };
+           _overlayList.call(drawListItems, 'checkbox', chooseOverlay, function (d) {
+             return !d.isHidden() && d.overlay;
+           });
+         }
 
-         radio.focus = function () {
-           radios.node().focus();
-         };
+         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;
+       }
 
-         radio.entityIDs = function (val) {
-           if (!arguments.length) return _entityIDs;
-           _entityIDs = val;
-           _oldType = {};
-           return radio;
-         };
+       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;
+       }
 
-         radio.isAllowed = function () {
-           return _entityIDs.length === 1;
-         };
+       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
 
-         return utilRebind(radio, dispatch$1, 'on');
-       }
+         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?
 
-       function uiFieldRestrictions(field, context) {
-         var dispatch$1 = dispatch('change');
-         var breathe = behaviorBreathe();
-         corePreferences('turn-restriction-via-way', null); // remove old key
+             var hhh = depth ? Array(depth + 1).join('#') + ' ' : ''; // if so, prepend with some ##'s
 
-         var storedViaWay = corePreferences('turn-restriction-via-way0'); // use new key #6922
+             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 storedDistance = corePreferences('turn-restriction-distance');
+         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 _maxViaWay = storedViaWay !== null ? +storedViaWay : 0;
+             if (rtl) {
+               nav.call(drawNext).call(drawPrevious);
+             } else {
+               nav.call(drawPrevious).call(drawNext);
+             }
 
-         var _maxDistance = storedDistance ? +storedDistance : 30;
+             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 _initialized = false;
+             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 _parent = select(null); // the entire field
+           function clickWalkthrough(d3_event) {
+             d3_event.preventDefault();
+             if (context.inIntro()) return;
+             context.container().call(uiIntro(context));
+             context.ui().togglePanes();
+           }
 
+           function clickShortcuts(d3_event) {
+             d3_event.preventDefault();
+             context.container().call(context.ui().shortcuts, true);
+           }
 
-         var _container = select(null); // just the map
+           var toc = content.append('ul').attr('class', 'toc');
+           var menuItems = toc.selectAll('li').data(docs).enter().append('li').append('a').attr('href', '#').html(function (d) {
+             return d.title;
+           }).on('click', function (d3_event, d) {
+             d3_event.preventDefault();
+             clickHelp(d, docs.indexOf(d));
+           });
+           var shortcuts = toc.append('li').attr('class', 'shortcuts').call(uiTooltip().title(_t.html('shortcuts.tooltip')).keys(['?']).placement('top')).append('a').attr('href', '#').on('click', clickShortcuts);
+           shortcuts.append('div').html(_t.html('shortcuts.title'));
+           var walkthrough = toc.append('li').attr('class', 'walkthrough').append('a').attr('href', '#').on('click', clickWalkthrough);
+           walkthrough.append('svg').attr('class', 'logo logo-walkthrough').append('use').attr('xlink:href', '#iD-logo-walkthrough');
+           walkthrough.append('div').html(_t.html('splash.walkthrough'));
+           var helpContent = content.append('div').attr('class', 'left-content');
+           var body = helpContent.append('div').attr('class', 'body');
+           var nav = helpContent.append('div').attr('class', 'nav');
+           clickHelp(docs[0], 0);
+         };
 
+         return helpPane;
+       }
 
-         var _oldTurns;
+       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 _graph;
+         function getOptions() {
+           return {
+             what: corePreferences('validate-what') || 'edited',
+             where: corePreferences('validate-where') || 'all'
+           };
+         } // get and cache the issues to display, unordered
 
-         var _vertexID;
 
-         var _intersection;
+         function reloadIssues() {
+           _issues = context.validator().getIssuesBySeverity(getOptions())[severity];
+         }
 
-         var _fromWayID;
+         function renderDisclosureContent(selection) {
+           var center = context.map().center();
+           var graph = context.graph(); // sort issues by distance away from the center of the map
 
-         var _lastXPos;
+           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
 
-         function restrictions(selection) {
-           _parent = selection; // try to reuse the intersection, but always rebuild it if the graph has changed
 
-           if (_vertexID && (context.graph() !== _graph || !_intersection)) {
-             _graph = context.graph();
-             _intersection = osmIntersection(_graph, _vertexID, _maxDistance);
-           } // It's possible for there to be no actual intersection here.
-           // for example, a vertex of two `highway=path`
-           // In this case, hide the field.
+           issues = issues.slice(0, 1000); //renderIgnoredIssuesReset(_warningsSelection);
 
+           selection.call(drawIssuesList, issues);
+         }
 
-           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 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
 
-           select(selection.node().parentNode).classed('hide', !isOK); // if form field is hidden or has detached from dom, clean up.
+           items.exit().remove(); // Enter
 
-           if (!isOK || !context.container().select('.inspector-wrap.inspector-hidden').empty() || !selection.node().parentNode || !selection.node().parentNode.parentNode) {
-             selection.call(restrictions.off);
-             return;
+           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
+
+           items = items.merge(itemsEnter).order();
+           items.selectAll('.issue-message').html(function (d) {
+             return d.message(context);
+           });
+           /*
+           // autofix
+           var canAutoFix = issues.filter(function(issue) { return issue.autoFix; });
+            var autoFixAll = selection.selectAll('.autofix-all')
+               .data(canAutoFix.length ? [0] : []);
+            // exit
+           autoFixAll.exit()
+               .remove();
+            // enter
+           var autoFixAllEnter = autoFixAll.enter()
+               .insert('div', '.issues-list')
+               .attr('class', 'autofix-all');
+            var linkEnter = autoFixAllEnter
+               .append('a')
+               .attr('class', 'autofix-all-link')
+               .attr('href', '#');
+            linkEnter
+               .append('span')
+               .attr('class', 'autofix-all-link-text')
+               .html(t.html('issues.fix_all.title'));
+            linkEnter
+               .append('span')
+               .attr('class', 'autofix-all-link-icon')
+               .call(svgIcon('#iD-icon-wrench'));
+            if (severity === 'warning') {
+               renderIgnoredIssuesReset(selection);
            }
+            // update
+           autoFixAll = autoFixAll
+               .merge(autoFixAllEnter);
+            autoFixAll.selectAll('.autofix-all-link')
+               .on('click', function() {
+                   context.pauseChangeDispatch();
+                   context.perform(actionNoop());
+                   canAutoFix.forEach(function(issue) {
+                       var args = issue.autoFix.autoArgs.slice();  // copy
+                       if (typeof args[args.length - 1] !== 'function') {
+                           args.pop();
+                       }
+                       args.push(t('issues.fix_all.annotation'));
+                       context.replace.apply(context, args);
+                   });
+                   context.resumeChangeDispatch();
+                   context.validator().validate();
+               });
+           */
+         }
 
-           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
+         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
 
-           var containerEnter = container.enter().append('div').attr('class', 'restriction-container');
-           containerEnter.append('div').attr('class', 'restriction-help'); // update
 
-           _container = containerEnter.merge(container).call(renderViewer);
-           var controls = wrap.selectAll('.restriction-controls').data([0]); // enter/update
+             section.reRender();
+           });
+         }, 1000));
+         return section;
+       }
 
-           controls.enter().append('div').attr('class', 'restriction-controls-container').append('div').attr('class', 'restriction-controls').merge(controls).call(renderControls);
+       function uiSectionValidationOptions(context) {
+         var section = uiSection('issues-options', context).content(renderContent);
+
+         function renderContent(selection) {
+           var container = selection.selectAll('.issues-options-container').data([0]);
+           container = container.enter().append('div').attr('class', 'issues-options-container').merge(container);
+           var data = [{
+             key: 'what',
+             values: ['edited', 'all']
+           }, {
+             key: 'where',
+             values: ['visible', 'all']
+           }];
+           var options = container.selectAll('.issues-option').data(data, function (d) {
+             return d.key;
+           });
+           var optionsEnter = options.enter().append('div').attr('class', function (d) {
+             return 'issues-option issues-option-' + d.key;
+           });
+           optionsEnter.append('div').attr('class', 'issues-option-title').html(function (d) {
+             return _t.html('issues.options.' + d.key + '.title');
+           });
+           var valuesEnter = optionsEnter.selectAll('label').data(function (d) {
+             return d.values.map(function (val) {
+               return {
+                 value: val,
+                 key: d.key
+               };
+             });
+           }).enter().append('label');
+           valuesEnter.append('input').attr('type', 'radio').attr('name', function (d) {
+             return 'issues-option-' + d.key;
+           }).attr('value', function (d) {
+             return d.value;
+           }).property('checked', function (d) {
+             return getOptions()[d.key] === d.value;
+           }).on('change', function (d3_event, d) {
+             updateOptionValue(d3_event, d.key, d.value);
+           });
+           valuesEnter.append('span').html(function (d) {
+             return _t.html('issues.options.' + d.key + '.' + d.value);
+           });
          }
 
-         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 getOptions() {
+           return {
+             what: corePreferences('validate-what') || 'edited',
+             // 'all', 'edited'
+             where: corePreferences('validate-where') || 'all' // 'all', 'visible'
 
-           selection.selectAll('.restriction-distance-input').property('value', _maxDistance).on('input', function () {
-             var val = select(this).property('value');
-             _maxDistance = +val;
-             _intersection = null;
+           };
+         }
 
-             _container.selectAll('.layer-osm .layer-turns *').remove();
+         function updateOptionValue(d3_event, d, val) {
+           if (!val && d3_event && d3_event.target) {
+             val = d3_event.target.value;
+           }
 
-             corePreferences('turn-restriction-distance', _maxDistance);
+           corePreferences('validate-' + d, val);
+           context.validator().validate();
+         }
 
-             _parent.call(restrictions);
-           });
-           selection.selectAll('.restriction-distance-text').html(displayMaxDistance(_maxDistance));
-           var viaControl = selection.selectAll('.restriction-via-way').data([0]);
-           viaControl.exit().remove();
-           var viaControlEnter = viaControl.enter().append('div').attr('class', 'restriction-control restriction-via-way');
-           viaControlEnter.append('span').attr('class', 'restriction-control-label restriction-via-way-label').html(_t.html('restriction.controls.via') + ':');
-           viaControlEnter.append('input').attr('class', 'restriction-via-way-input').attr('type', 'range').attr('min', '0').attr('max', '2').attr('step', '1');
-           viaControlEnter.append('span').attr('class', 'restriction-via-way-text'); // update
+         return section;
+       }
 
-           selection.selectAll('.restriction-via-way-input').property('value', _maxViaWay).on('input', function () {
-             var val = select(this).property('value');
-             _maxViaWay = +val;
+       function uiSectionValidationRules(context) {
+         var MINSQUARE = 0;
+         var MAXSQUARE = 20;
+         var DEFAULTSQUARE = 5; // see also unsquare_way.js
 
-             _container.selectAll('.layer-osm .layer-turns *').remove();
+         var section = uiSection('issues-rules', context).disclosureContent(renderDisclosureContent).label(_t.html('issues.rules.title'));
 
-             corePreferences('turn-restriction-via-way0', _maxViaWay);
+         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;
+         });
 
-             _parent.call(restrictions);
+         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);
            });
-           selection.selectAll('.restriction-via-way-text').html(displayMaxVia(_maxViaWay));
+           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);
          }
 
-         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 drawListItems(selection, data, type, name, change, active) {
+           var items = selection.selectAll('li').data(data); // Exit
 
-           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
+           items.exit().remove(); // Enter
 
-           var extent = geoExtent();
+           var enter = items.enter().append('li');
 
-           for (var i = 0; i < _intersection.vertices.length; i++) {
-             extent._extend(_intersection.vertices[i].extent());
-           } // If this is a large intersection, adjust zoom to fit extent
+           if (name === 'rule') {
+             enter.call(uiTooltip().title(function (d) {
+               return _t.html('issues.' + d + '.tip');
+             }).placement('top'));
+           }
 
+           var label = enter.append('label');
+           label.append('input').attr('type', type).attr('name', name).on('change', change);
+           label.append('span').html(function (d) {
+             var params = {};
 
-           if (_intersection.vertices.length > 1) {
-             var padding = 180; // in z22 pixels
+             if (d === 'unsquare_way') {
+               params.val = '<span class="square-degrees"></span>';
+             }
 
-             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));
-           }
+             return _t.html('issues.' + d + '.title', params);
+           }); // Update
 
-           var padTop = 35; // reserve top space for hint text
+           items = items.merge(enter);
+           items.classed('active', active).selectAll('input').property('checked', active).property('indeterminate', false); // user-configurable square threshold
 
-           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);
+           var degStr = corePreferences('validate-square-degrees');
 
-           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.
+           if (degStr === null) {
+             degStr = DEFAULTSQUARE.toString();
+           }
 
+           var span = items.selectAll('.square-degrees');
+           var input = span.selectAll('.square-degrees-input').data([0]); // enter / update
 
-           if (_fromWayID && !vgraph.hasEntity(_fromWayID)) {
-             _fromWayID = null;
-             _oldTurns = null;
-           }
+           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);
+         }
 
-           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;
+         function changeSquare() {
+           var input = select(this);
+           var degStr = utilGetSetValue(input).trim();
+           var degNum = parseFloat(degStr, 10);
 
-           if (_fromWayID) {
-             way = vgraph.entity(_fromWayID);
-             surface.selectAll('.' + _fromWayID).classed('selected', true).classed('related', true);
+           if (!isFinite(degNum)) {
+             degNum = DEFAULTSQUARE;
+           } else if (degNum > MAXSQUARE) {
+             degNum = MAXSQUARE;
+           } else if (degNum < MINSQUARE) {
+             degNum = MINSQUARE;
            }
 
-           document.addEventListener('resizeWindow', function () {
-             utilSetDimensions(_container, null);
-             redraw(1);
-           }, false);
-           updateHints(null);
+           degNum = Math.round(degNum * 10) / 10; // round to 1 decimal
 
-           function click(d3_event) {
-             surface.call(breathe.off).call(breathe);
-             var datum = d3_event.target.__data__;
-             var entity = datum && datum.properties && datum.properties.entity;
+           degStr = degNum.toString();
+           input.property('value', degStr);
+           corePreferences('validate-square-degrees', degStr);
+           context.validator().revalidateUnsquare();
+         }
 
-             if (entity) {
-               datum = entity;
-             }
+         function isRuleEnabled(d) {
+           return context.validator().isRuleEnabled(d);
+         }
 
-             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);
+         function toggleRule(d3_event, d) {
+           context.validator().toggleRule(d);
+         }
 
-               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
+         context.validator().on('validated.uiSectionValidationRules', function () {
+           window.requestIdleCallback(section.reRender);
+         });
+         return section;
+       }
 
-                 datumOnly.only = true; // but change this property
+       function uiSectionValidationStatus(context) {
+         var section = uiSection('issues-status', context).content(renderContent).shouldDisplay(function () {
+           var issues = context.validator().getIssues(getOptions());
+           return issues.length === 0;
+         });
 
-                 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 getOptions() {
+           return {
+             what: corePreferences('validate-what') || 'edited',
+             where: corePreferences('validate-where') || 'all'
+           };
+         }
 
-                 turns = _intersection.turns(_fromWayID, 2);
-                 extraActions = [];
-                 _oldTurns = [];
+         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 < turns.length; i++) {
-                   var turn = turns[i];
-                   if (seen[turn.restrictionID]) continue; // avoid deleting the turn twice (#4968, #4928)
+         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 (turn.direct && turn.path[1] === datum.path[1]) {
-                     seen[turns[i].restrictionID] = true;
-                     turn.restrictionType = osmInferRestriction(vgraph, turn, projection);
+           resetIgnored.exit().remove(); // enter
 
-                     _oldTurns.push(turn);
+           var resetIgnoredEnter = resetIgnored.enter().append('div').attr('class', 'reset-ignored section-footer');
+           resetIgnoredEnter.append('a').attr('href', '#'); // update
 
-                     extraActions.push(actionUnrestrictTurn(turn));
-                   }
-                 }
+           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();
+           });
+         }
 
-                 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 = [];
+         function setNoIssuesText(selection) {
+           var opts = getOptions();
 
-                 for (i = 0; i < turns.length; i++) {
-                   if (turns[i].key !== datum.key) {
-                     extraActions.push(actionRestrictTurn(turns[i], turns[i].restrictionType));
-                   }
-                 }
+           function checkForHiddenIssues(cases) {
+             for (var type in cases) {
+               var hiddenOpts = cases[type];
+               var hiddenIssues = context.validator().getIssues(hiddenOpts);
 
-                 _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')]);
+               if (hiddenIssues.length) {
+                 selection.select('.box .details').html(_t.html('issues.no_issues.hidden_issues.' + type, {
+                   count: hiddenIssues.length.toString()
+                 }));
+                 return;
                }
-
-               context.perform.apply(context, actions); // At this point the datum will be changed, but will have same key..
-               // Refresh it and update the help..
-
-               var s = surface.selectAll('.' + datum.key);
-               datum = s.empty() ? null : s.datum();
-               updateHints(datum);
-             } else {
-               _fromWayID = null;
-               _oldTurns = null;
-               redraw();
              }
-           }
 
-           function mouseover(d3_event) {
-             var datum = d3_event.target.__data__;
-             updateHints(datum);
+             selection.select('.box .details').html(_t.html('issues.no_issues.hidden_issues.none'));
            }
 
-           _lastXPos = _lastXPos || sdims[0];
-
-           function redraw(minChange) {
-             var xPos = -1;
-
-             if (minChange) {
-               xPos = utilGetDimensions(context.container().select('.sidebar'))[0];
-             }
-
-             if (!minChange || minChange && Math.abs(xPos - _lastXPos) >= minChange) {
-               if (context.hasEntity(_vertexID)) {
-                 _lastXPos = xPos;
+           var messageType;
 
-                 _container.call(renderViewer);
+           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'
+               }
+             });
            }
 
-           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 (wayID) {
-               var turns = _intersection.turns(wayID, _maxViaWay);
-
-               for (var i = 0; i < turns.length; i++) {
-                 var turn = turns[i];
-                 var ids = [turn.to.way];
-                 var klass = turn.no ? 'restrict' : turn.only ? 'only' : 'allow';
-
-                 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');
-               }
-             }
+           if (opts.what === 'edited' && context.history().difference().summary().length === 0) {
+             messageType = 'no_edits';
            }
 
-           function updateHints(datum) {
-             var help = _container.selectAll('.restriction-help').html('');
+           selection.select('.box .message').html(_t.html('issues.no_issues.message.' + messageType));
+         }
 
-             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;
+         context.validator().on('validated.uiSectionValidationStatus', function () {
+           window.requestIdleCallback(section.reRender);
+         });
+         context.map().on('move.uiSectionValidationStatus', debounce(function () {
+           window.requestIdleCallback(section.reRender);
+         }, 1000));
+         return section;
+       }
 
-             if (entity) {
-               datum = entity;
-             }
+       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;
+       }
 
-             if (_fromWayID) {
-               way = vgraph.entity(_fromWayID);
-               surface.selectAll('.' + _fromWayID).classed('selected', true).classed('related', true);
-             } // Hovering a way
+       function uiSettingsCustomData(context) {
+         var dispatch = dispatch$8('change');
 
+         function render(selection) {
+           var dataLayer = context.layers().layer('data'); // keep separate copies of original and current settings
 
-             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;
+           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';
 
-               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 modal = uiConfirm(selection).okButton();
+           modal.classed('settings-modal settings-custom-data', true);
+           modal.select('.modal-section.header').append('h3').html(_t.html('settings.custom_data.header'));
+           var textSection = modal.select('.modal-section.message-text');
+           textSection.append('pre').attr('class', 'instructions-file').html(_t.html('settings.custom_data.file.instructions'));
+           textSection.append('input').attr('class', 'field-file').attr('type', 'file').property('files', _currSettings.fileList) // works for all except IE11
+           .on('change', function (d3_event) {
+             var files = d3_event.target.files;
+
+             if (files && files.length) {
+               _currSettings.url = '';
+               textSection.select('.field-url').property('value', '');
+               _currSettings.fileList = files;
+             } else {
+               _currSettings.fileList = null;
+             }
+           });
+           textSection.append('h4').html(_t.html('settings.custom_data.or'));
+           textSection.append('pre').attr('class', 'instructions-url').html(_t.html('settings.custom_data.url.instructions'));
+           textSection.append('textarea').attr('class', 'field-url').attr('placeholder', _t('settings.custom_data.url.placeholder')).call(utilNoAuto).property('value', _currSettings.url); // insert a cancel button
 
-               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)
-               }));
+           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);
 
-               if (datum.via.ways && datum.via.ways.length) {
-                 var names = [];
+           function isSaveDisabled() {
+             return null;
+           } // restore the original url
 
-                 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);
-                 }
 
-                 help.append('div') // "VIA {viaNames}"
-                 .html(_t.html('restriction.help.via_names', {
-                   via: placeholders.via,
-                   viaNames: names.join(', ')
-                 }));
-               }
+           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
 
-               if (!indirect) {
-                 help.append('div') // Click for "No Right Turn"
-                 .html(_t.html('restriction.help.toggle', {
-                   turn: 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 {
-               highlightPathsFrom(null);
+           function clickSave() {
+             _currSettings.url = textSection.select('.field-url').property('value').trim(); // one or the other but not both
 
-               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.url) {
+               _currSettings.fileList = null;
              }
+
+             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');
+       }
 
-           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
-               })
-             };
-           }
+       function uiSectionDataLayers(context) {
+         var settingsCustomData = uiSettingsCustomData(context).on('change', customChanged);
+         var layers = context.layers();
+         var section = uiSection('data-layers', context).label(_t.html('map_data.data_layers')).disclosureContent(renderDisclosureContent);
 
-           return _t.html('restriction.controls.distance_up_to', opts);
+         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 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 showsLayer(which) {
+           var layer = layers.layer(which);
+
+           if (layer) {
+             return layer.enabled();
+           }
+
+           return false;
          }
 
-         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;
+         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 (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').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
 
-         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').html(_t.html('map_data.layers.custom.title'));
+           liEnter.append('button').attr('class', 'open-data-options').call(uiTooltip().title(_t.html('settings.custom_data.tooltip')).placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left')).on('click', function (d3_event) {
+             d3_event.preventDefault();
+             editCustom();
+           }).call(svgIcon('#iD-icon-more'));
+           liEnter.append('button').attr('class', 'zoom-to-data').call(uiTooltip().title(_t.html('map_data.layers.custom.zoom')).placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left')).on('click', function (d3_event) {
+             if (select(this).classed('disabled')) return;
+             d3_event.preventDefault();
+             d3_event.stopPropagation();
+             dataLayer.fitZoom();
+           }).call(svgIcon('#iD-icon-framed-dot', 'monochrome')); // Update
 
-         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').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();
-             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').html(_t.html('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('href', '#').html(_t.html('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('href', '#').html(_t.html('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 autoHiddenFeature(d) {
+           return context.features().autoHidden(d);
+         }
+
+         function showsFeature(d) {
+           return context.features().enabled(d);
+         }
+
+         function clickFeature(d3_event, d) {
+           context.features().toggle(d);
+         }
+
+         function showsLayer(id) {
+           var layer = context.layers().layer(id);
+           return layer && layer.enabled();
+         } // add listeners
+
+
+         context.features().on('change.map_features', section.reRender);
+         return section;
+       }
+
+       function uiSectionMapStyleOptions(context) {
+         var section = uiSection('fill-area', context).label(_t.html('map_data.style_options')).disclosureContent(renderDisclosureContent).expandedByDefault(false);
+
+         function renderDisclosureContent(selection) {
+           var container = selection.selectAll('.layer-fill-list').data([0]);
+           container.enter().append('ul').attr('class', 'layer-list layer-fill-list').merge(container).call(drawListItems, context.map().areaFillOptions, 'radio', 'area_fill', setFill, isActiveFill);
+           var container2 = selection.selectAll('.layer-visual-diff-list').data([0]);
+           container2.enter().append('ul').attr('class', 'layer-list layer-visual-diff-list').merge(container2).call(drawListItems, ['highlight_edits'], 'checkbox', 'visual_diff', toggleHighlightEdited, function () {
+             return context.surface().classed('highlight-edited');
            });
          }
 
-         function change() {
-           var syncTags = {};
-           syncTags[field.key] = _qid;
-           dispatch$1.call('change', this, syncTags); // attempt asynchronous update of wikidata tag..
+         function drawListItems(selection, data, type, name, change, active) {
+           var items = selection.selectAll('li').data(data); // Exit
 
-           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.
+           items.exit().remove(); // Enter
 
-             if (context.graph() !== initGraph) return;
-             if (!entity.sitelinks) return;
-             var langs = wikidata.languagesToQuery(); // use the label and description languages as fallbacks
+           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
 
-             ['labels', 'descriptions'].forEach(function (key) {
-               if (!entity[key]) return;
-               var valueLangs = Object.keys(entity[key]);
-               if (valueLangs.length === 0) return;
-               var valueLang = valueLangs[0];
+           items = items.merge(enter);
+           items.classed('active', active).selectAll('input').property('checked', active).property('indeterminate', false);
+         }
 
-               if (langs.indexOf(valueLang) === -1) {
-                 langs.push(valueLang);
-               }
-             });
-             var newWikipediaValue;
+         function isActiveFill(d) {
+           return context.map().activeAreaFill() === d;
+         }
 
-             if (_wikipediaKey) {
-               var foundPreferred;
+         function toggleHighlightEdited(d3_event) {
+           d3_event.preventDefault();
+           context.map().toggleHighlightEdited();
+         }
 
-               for (var i in langs) {
-                 var lang = langs[i];
-                 var siteID = lang.replace('-', '_') + 'wiki';
+         function setFill(d3_event, d) {
+           context.map().activeAreaFill(d);
+         }
 
-                 if (entity.sitelinks[siteID]) {
-                   foundPreferred = true;
-                   newWikipediaValue = lang + ':' + entity.sitelinks[siteID].title; // use the first match
+         context.map().on('changeHighlighting.ui_style, changeAreaFill.ui_style', section.reRender);
+         return section;
+       }
 
-                   break;
-                 }
-               }
+       function uiSectionPhotoOverlays(context) {
+         var layers = context.layers();
+         var section = uiSection('photo-overlays', context).label(_t.html('photo_overlays.title')).disclosureContent(renderDisclosureContent).expandedByDefault(false);
 
-               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');
-                 });
+         function renderDisclosureContent(selection) {
+           var container = selection.selectAll('.photo-overlay-container').data([0]);
+           container.enter().append('div').attr('class', 'photo-overlay-container').merge(container).call(drawPhotoItems).call(drawPhotoTypeItems).call(drawDateFilter).call(drawUsernameFilter);
+         }
 
-                 if (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;
-                 }
-               }
-             }
+         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 (newWikipediaValue) {
-               newWikipediaValue = context.cleanTagValue(newWikipediaValue);
-             }
+           function layerSupported(d) {
+             return d.layer && d.layer.supported();
+           }
 
-             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 layerEnabled(d) {
+             return layerSupported(d) && d.layer.enabled();
+           }
 
-               if (newWikipediaValue === null) {
-                 if (!currTags[_wikipediaKey]) return null;
-                 delete currTags[_wikipediaKey];
-               } else {
-                 currTags[_wikipediaKey] = newWikipediaValue;
-               }
+           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;
 
-               return actionChangeTags(entityID, currTags);
-             }).filter(Boolean);
-             if (!actions.length) return; // Coalesce the update of wikidata tag into the previous tag change
+             if (d.id === 'mapillary-signs' || d.id === 'mapillary-map-features') {
+               classes += ' indented';
+             }
 
-             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 classes;
            });
-         }
+           var labelEnter = liEnter.append('label').each(function (d) {
+             var titleID;
+             if (d.id === 'mapillary-signs') titleID = 'mapillary.signs.tooltip';else if (d.id === 'mapillary') titleID = 'mapillary_images.tooltip';else if (d.id === 'openstreetcam') titleID = 'openstreetcam_images.tooltip';else titleID = d.id.replace(/-/g, '_') + '.tooltip';
+             select(this).call(uiTooltip().title(_t.html(titleID)).placement('top'));
+           });
+           labelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event, d) {
+             toggleLayer(d.id);
+           });
+           labelEnter.append('span').html(function (d) {
+             var id = d.id;
+             if (id === 'mapillary-signs') id = 'photo_overlays.traffic_signs';
+             return _t.html(id.replace(/-/g, '_') + '.title');
+           }); // Update
 
-         function setLabelForEntity() {
-           var label = '';
+           li.merge(liEnter).classed('active', layerEnabled).selectAll('input').property('checked', layerEnabled);
+         }
 
-           if (_wikidataEntity) {
-             label = entityPropertyForDisplay(_wikidataEntity, 'labels');
+         function drawPhotoTypeItems(selection) {
+           var data = context.photos().allPhotoTypes();
 
-             if (label.length === 0) {
-               label = _wikidataEntity.id.toString();
-             }
+           function typeEnabled(d) {
+             return context.photos().showsPhotoType(d);
            }
 
-           utilGetSetValue(_searchInput, label);
-         }
-
-         wiki.tags = function (tags) {
-           var isMixed = Array.isArray(tags[field.key]);
+           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
 
-           _searchInput.attr('title', isMixed ? tags[field.key].filter(Boolean).join('\n') : null).attr('placeholder', isMixed ? _t('inspector.multiple_values') : '').classed('mixed', isMixed);
+           li.merge(liEnter).classed('active', typeEnabled).selectAll('input').property('checked', typeEnabled);
+         }
 
-           _qid = typeof tags[field.key] === 'string' && tags[field.key] || '';
+         function drawDateFilter(selection) {
+           var data = context.photos().dateFilters();
 
-           if (!/^Q[0-9]*$/.test(_qid)) {
-             // not a proper QID
-             unrecognized();
-             return;
-           } // QID value in correct format
+           function filterEnabled(d) {
+             return context.photos().dateFilterValue(d);
+           }
 
+           var ul = selection.selectAll('.layer-list-date-filter').data([0]);
+           ul.exit().remove();
+           ul = ul.enter().append('ul').attr('class', 'layer-list layer-list-date-filter').merge(ul);
+           var li = ul.selectAll('.list-item-date-filter').data(context.photos().shouldFilterByDate() ? data : []);
+           li.exit().remove();
+           var liEnter = li.enter().append('li').attr('class', 'list-item-date-filter');
+           var labelEnter = liEnter.append('label').each(function (d) {
+             select(this).call(uiTooltip().title(_t.html('photo_overlays.date_filter.' + d + '.tooltip')).placement('top'));
+           });
+           labelEnter.append('span').html(function (d) {
+             return _t.html('photo_overlays.date_filter.' + d + '.title');
+           });
+           labelEnter.append('input').attr('type', 'date').attr('class', 'list-item-input').attr('placeholder', _t('units.year_month_day')).call(utilNoAuto).each(function (d) {
+             utilGetSetValue(select(this), context.photos().dateFilterValue(d) || '');
+           }).on('change', function (d3_event, d) {
+             var value = utilGetSetValue(select(this)).trim();
+             context.photos().setDateFilter(d, value, true); // reload the displayed dates
 
-           _wikiURL = 'https://wikidata.org/wiki/' + _qid;
-           wikidata.entityByQID(_qid, function (err, entity) {
-             if (err) {
-               unrecognized();
-               return;
-             }
+             li.selectAll('input').each(function (d) {
+               utilGetSetValue(select(this), context.photos().dateFilterValue(d) || '');
+             });
+           });
+           li = li.merge(liEnter).classed('active', filterEnabled);
+         }
 
-             _wikidataEntity = entity;
-             setLabelForEntity();
-             var description = entityPropertyForDisplay(entity, 'descriptions');
+         function drawUsernameFilter(selection) {
+           function filterEnabled() {
+             return context.photos().usernames();
+           }
 
-             _selection.select('button.wiki-link').classed('disabled', false);
+           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);
 
-             _selection.select('.preset-wikidata-description').style('display', function () {
-               return description.length > 0 ? 'flex' : 'none';
-             }).select('input').attr('value', description);
+           function usernameValue() {
+             var usernames = context.photos().usernames();
+             if (usernames) return usernames.join('; ');
+             return usernames;
+           }
+         }
 
-             _selection.select('.preset-wikidata-identifier').style('display', function () {
-               return entity.id ? 'flex' : 'none';
-             }).select('input').attr('value', entity.id);
-           }); // not a proper QID
+         function toggleLayer(which) {
+           setLayer(which, !showsLayer(which));
+         }
 
-           function unrecognized() {
-             _wikidataEntity = null;
-             setLabelForEntity();
+         function showsLayer(which) {
+           var layer = layers.layer(which);
 
-             _selection.select('.preset-wikidata-description').style('display', 'none');
+           if (layer) {
+             return layer.enabled();
+           }
 
-             _selection.select('.preset-wikidata-identifier').style('display', 'none');
+           return false;
+         }
 
-             _selection.select('button.wiki-link').classed('disabled', true);
+         function setLayer(which, enabled) {
+           var layer = layers.layer(which);
 
-             if (_qid && _qid !== '') {
-               _wikiURL = 'https://wikidata.org/wiki/Special:Search?search=' + _qid;
-             } else {
-               _wikiURL = '';
-             }
+           if (layer) {
+             layer.enabled(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
+         context.layers().on('change.uiSectionPhotoOverlays', section.reRender);
+         context.photos().on('change.uiSectionPhotoOverlays', section.reRender);
+         return section;
+       }
 
-           var langs = wikidata.languagesToQuery();
+       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;
+       }
 
-           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
+       function uiSectionPrivacy(context) {
+         var section = uiSection('preferences-third-party', context).label(_t.html('preferences.privacy.title')).disclosureContent(renderDisclosureContent);
 
+         var _showThirdPartyIcons = corePreferences('preferences.privacy.thirdpartyicons') || 'true';
 
-           return propObj[langKeys[0]].value;
-         }
+         function renderDisclosureContent(selection) {
+           // enter
+           var privacyOptionsListEnter = selection.selectAll('.privacy-options-list').data([0]).enter().append('ul').attr('class', 'layer-list privacy-options-list');
+           var thirdPartyIconsEnter = privacyOptionsListEnter.append('li').attr('class', 'privacy-third-party-icons-item').append('label').call(uiTooltip().title(_t.html('preferences.privacy.third_party_icons.tooltip')).placement('bottom'));
+           thirdPartyIconsEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event) {
+             d3_event.preventDefault();
+             _showThirdPartyIcons = _showThirdPartyIcons === 'true' ? 'false' : 'true';
+             corePreferences('preferences.privacy.thirdpartyicons', _showThirdPartyIcons);
+             update();
+           });
+           thirdPartyIconsEnter.append('span').html(_t.html('preferences.privacy.third_party_icons.description')); // Privacy Policy link
 
-         wiki.entityIDs = function (val) {
-           if (!arguments.length) return _entityIDs;
-           _entityIDs = val;
-           return wiki;
-         };
+           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();
 
-         wiki.focus = function () {
-           _searchInput.node().focus();
-         };
+           function update() {
+             selection.selectAll('.privacy-third-party-icons-item').classed('active', _showThirdPartyIcons === 'true').select('input').property('checked', _showThirdPartyIcons === 'true');
+           }
+         }
 
-         return utilRebind(wiki, dispatch$1, 'on');
+         return section;
        }
 
-       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
-               };
-             }));
-           });
-         });
-
-         function wiki(selection) {
-           var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
-           wrap = wrap.enter().append('div').attr('class', "form-field-input-wrap form-field-input-".concat(field.type)).merge(wrap);
-           var langContainer = wrap.selectAll('.wiki-lang-container').data([0]);
-           langContainer = langContainer.enter().append('div').attr('class', 'wiki-lang-container').merge(langContainer);
-           _langInput = langContainer.selectAll('input.wiki-lang').data([0]);
-           _langInput = _langInput.enter().append('input').attr('type', 'text').attr('class', 'wiki-lang').attr('placeholder', _t('translate.localized_translation_language')).call(utilNoAuto).call(langCombo).merge(_langInput);
-
-           _langInput.on('blur', changeLang).on('change', changeLang);
+           container.attr('lang', _mainLocalizer.localeCode()).attr('dir', _mainLocalizer.textDirection()); // setup fullscreen keybindings (no button shown at this time)
 
-           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);
+           container.call(uiFullScreen(context));
+           var map = context.map();
+           map.redrawEnable(false); // don't draw until we've set zoom/lat/long
 
-           _titleInput.on('blur', function () {
-             change(true);
-           }).on('change', function () {
-             change(false);
+           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 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');
-           });
-         }
+           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.
 
-         function defaultLanguageInfo(skipEnglishFallback) {
-           var langCode = _mainLocalizer.languageCode().toLowerCase();
+           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
 
-           for (var i in _dataWikipedia) {
-             var d = _dataWikipedia[i]; // default to the language of iD's current locale
+           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()
 
-             if (d[2] === langCode) return d;
-           } // fallback to English
+           var panes = overMap.append('div').attr('class', 'map-panes');
+           var uiPanes = [uiPaneBackground(context), uiPaneMapData(context), uiPaneIssues(context), uiPanePreferences(context), uiPaneHelp(context)];
+           uiPanes.forEach(function (pane) {
+             controls.append('div').attr('class', 'map-control map-pane-control ' + pane.id + '-control').call(pane.renderToggleButton);
+             panes.call(pane.renderPane);
+           });
+           ui.info = uiInfo(context);
+           overMap.call(ui.info);
+           overMap.append('div').attr('class', 'photoviewer').classed('al', true) // 'al'=left,  'ar'=right
+           .classed('hide', true).call(ui.photoviewer);
+           overMap.append('div').attr('class', 'attribution-wrap').attr('dir', 'ltr').call(uiAttribution(context)); // Add footer
 
+           var about = content.append('div').attr('class', 'map-footer');
+           about.append('div').attr('class', 'api-status').call(uiStatus(context));
+           var footer = about.append('div').attr('class', 'map-footer-bar fillD');
+           footer.append('div').attr('class', 'flash-wrap footer-hide');
+           var footerWrap = footer.append('div').attr('class', 'main-footer-wrap footer-show');
+           footerWrap.append('div').attr('class', 'scale-block').call(uiScale(context));
+           var aboutList = footerWrap.append('div').attr('class', 'info-block').append('ul').attr('class', 'map-footer-list');
+           aboutList.append('li').attr('class', 'user-list').call(uiContributors(context));
+           var apiConnections = context.apiConnections();
 
-           return skipEnglishFallback ? ['', '', ''] : ['English', 'English', 'en'];
-         }
+           if (apiConnections && apiConnections.length > 1) {
+             aboutList.append('li').attr('class', 'source-switch').call(uiSourceSwitch(context).keys(apiConnections));
+           }
 
-         function language(skipEnglishFallback) {
-           var value = utilGetSetValue(_langInput).toLowerCase();
+           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));
 
-           for (var i in _dataWikipedia) {
-             var d = _dataWikipedia[i]; // return the language already set in the UI, if supported
+           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.
 
-             if (d[0].toLowerCase() === value || d[1].toLowerCase() === value || d[2] === value) return d;
-           } // fallback to English
 
+           ui.onResize();
+           map.redrawEnable(true);
+           ui.hash = behaviorHash(context);
+           ui.hash();
 
-           return defaultLanguageInfo(skipEnglishFallback);
-         }
+           if (!ui.hash.hadHash) {
+             map.centerZoom([0, 0], 2);
+           } // Bind events
 
-         function changeLang() {
-           utilGetSetValue(_langInput, language()[1]);
-           change(true);
-         }
 
-         function change(skipWikidata) {
-           var value = utilGetSetValue(_titleInput);
-           var m = value.match(/https?:\/\/([-a-z]+)\.wikipedia\.org\/(?:wiki|\1-[-a-z]+)\/([^#]+)(?:#(.+))?/);
+           window.onbeforeunload = function () {
+             return context.save();
+           };
 
-           var langInfo = m && _dataWikipedia.find(function (d) {
-             return m[1] === d[2];
-           });
+           window.onunload = function () {
+             context.history().unlock();
+           };
 
-           var syncTags = {};
+           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();
+             }
 
-           if (langInfo) {
-             var nativeLangName = langInfo[1]; // Normalize title http://www.mediawiki.org/wiki/API:Query#Title_normalization
+             var previousBackground = context.background().findSource(corePreferences('background-last-used-toggle'));
 
-             value = decodeURIComponent(m[2]).replace(/_/g, ' ');
+             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
 
-             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) {
+             var mode = context.mode();
+             if (mode && /^draw/.test(mode.id)) return;
+             var layer = context.layers().layer('osm');
 
-               anchor = decodeURIComponent(m[3]); // }
+             if (layer) {
+               layer.enabled(!layer.enabled());
 
-               value += '#' + anchor.replace(/_/g, ' ');
+               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 = value.slice(0, 1).toUpperCase() + value.slice(1);
-             utilGetSetValue(_langInput, nativeLangName);
-             utilGetSetValue(_titleInput, value);
-           }
+           if (!_initCounter++) {
+             if (!ui.hash.startWalkthrough) {
+               context.container().call(uiSplash(context)).call(uiRestore(context));
+             }
 
-           if (value) {
-             syncTags.wikipedia = context.cleanTagValue(language()[2] + ':' + value);
-           } else {
-             syncTags.wikipedia = undefined;
+             context.container().call(ui.shortcuts);
            }
 
-           dispatch$1.call('change', this, syncTags);
-           if (skipWikidata || !value || !language()[2]) return; // attempt asynchronous update of wikidata tag..
-
-           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 osm = context.connection();
+           var auth = uiLoading(context).message(_t.html('loading_auth')).blocking(true);
 
-             if (context.graph() !== initGraph) return;
-             var qids = Object.keys(data);
-             var value = qids && qids.find(function (id) {
-               return id.match(/^Q\d+$/);
+           if (osm && auth) {
+             osm.on('authLoading.ui', function () {
+               context.container().call(auth);
+             }).on('authDone.ui', function () {
+               auth.close();
              });
-             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);
-               }
+           _initCounter++;
 
-               return null;
-             }).filter(Boolean);
-             if (!actions.length) return; // Coalesce the update of wikidata tag into the previous tag change
+           if (ui.hash.startWalkthrough) {
+             ui.hash.startWalkthrough = false;
+             context.container().call(uiIntro(context));
+           }
 
-             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 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);
+             };
+           }
          }
 
-         wiki.tags = function (tags) {
-           _tags = tags;
-           updateForTags(tags);
-         };
-
-         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`
-
-           var m = value.match(/([^:]+):([^#]+)(?:#(.+))?/);
-           var tagLang = m && m[1];
-           var tagArticleTitle = m && m[2];
-           var anchor = m && m[3];
-
-           var tagLangInfo = tagLang && _dataWikipedia.find(function (d) {
-             return tagLang === d[2];
-           }); // value in correct format
-
+         var ui = {};
 
-           if (tagLangInfo) {
-             var nativeLangName = tagLangInfo[1];
-             utilGetSetValue(_langInput, nativeLangName);
-             utilGetSetValue(_titleInput, tagArticleTitle + (anchor ? '#' + anchor : ''));
+         var _loadPromise; // renders the iD interface into the container node
 
-             if (anchor) {
-               try {
-                 // Best-effort `anchorencode:` implementation
-                 anchor = encodeURIComponent(anchor.replace(/ /g, '_')).replace(/%/g, '.');
-               } catch (e) {
-                 anchor = anchor.replace(/ /g, '_');
-               }
-             }
 
-             _wikiURL = 'https://' + tagLang + '.wikipedia.org/wiki/' + tagArticleTitle.replace(/ /g, '_') + (anchor ? '#' + anchor : ''); // unrecognized value format
-           } else {
-             utilGetSetValue(_titleInput, value);
+         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.
 
-             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 = '';
-             }
-           }
-         }
 
-         wiki.entityIDs = function (val) {
-           if (!_arguments.length) return _entityIDs;
-           _entityIDs = val;
-           return wiki;
+         ui.restart = function () {
+           context.keybinding().clear();
+           _loadPromise = null;
+           context.container().selectAll('*').remove();
+           ui.ensureLoaded();
          };
 
-         wiki.focus = function () {
-           _titleInput.node().focus();
+         ui.lastPointerType = function () {
+           return _lastPointerType;
          };
 
-         return utilRebind(wiki, dispatch$1, 'on');
-       }
-       uiFieldWikipedia.supportsMultiselection = false;
-
-       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
-       };
-
-       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
+         ui.svgDefs = svgDefs(context);
+         ui.flash = uiFlash(context);
+         ui.sidebar = uiSidebar(context);
+         ui.photoviewer = uiPhotoviewer(context);
+         ui.shortcuts = uiShortcuts(context);
 
-         field.domId = utilUniqueDomId('form-field-' + field.safeid);
-         var _show = options.show;
-         var _state = '';
-         var _tags = {};
-         var _locked = false;
+         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 _lockedTip = uiTooltip().title(_t.html('inspector.lock.suggestion', {
-           label: field.label
-         })).placement('bottom');
+           var mapDimensions = utilGetDimensions(context.container().select('.main-content'), true);
+           utilGetDimensions(context.container().select('.sidebar'), true);
 
-         field.keys = field.keys || [field.key]; // only create the fields that are actually being shown
+           if (withPan !== undefined) {
+             map.redrawEnable(false);
+             map.pan(withPan);
+             map.redrawEnable(true);
+           }
 
-         if (_show && !field.impl) {
-           createField();
-         } // Creates the field.. This is done lazily,
-         // once we know that the field will be shown.
+           map.dimensions(mapDimensions);
+           ui.photoviewer.onMapResize(); // check if header or footer have overflowed
 
+           ui.checkOverflow('.top-toolbar');
+           ui.checkOverflow('.map-footer-bar'); // Use outdated code so it works on Explorer
 
-         function createField() {
-           field.impl = uiFields[field.type](field, context).on('change', function (t, onInput) {
-             dispatch$1.call('change', field, t, onInput);
-           });
+           var resizeWindowEvent = document.createEvent('Event');
+           resizeWindowEvent.initEvent('resizeWindow', true, true);
+           document.dispatchEvent(resizeWindowEvent);
+         }; // Call checkOverflow when resizing or whenever the contents change.
 
-           if (entityIDs) {
-             field.entityIDs = entityIDs; // if this field cares about the entities, pass them along
 
-             if (field.impl.entityIDs) {
-               field.impl.entityIDs(entityIDs);
-             }
+         ui.checkOverflow = function (selector, reset) {
+           if (reset) {
+             delete _needWidth[selector];
            }
-         }
 
-         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 selection = context.container().select(selector);
+           if (selection.empty()) return;
+           var scrollWidth = selection.property('scrollWidth');
+           var clientWidth = selection.property('clientWidth');
+           var needed = _needWidth[selector] || scrollWidth;
 
-         function tagsContainFieldKey() {
-           return field.keys.some(function (key) {
-             if (field.type === 'multiCombo') {
-               for (var tagKey in _tags) {
-                 if (tagKey.indexOf(key) === 0) {
-                   return true;
-                 }
-               }
+           if (scrollWidth > clientWidth) {
+             // overflow happening
+             selection.classed('narrow', true);
 
-               return false;
+             if (!_needWidth[selector]) {
+               _needWidth[selector] = scrollWidth;
              }
+           } else if (scrollWidth >= needed) {
+             selection.classed('narrow', false);
+           }
+         };
 
-             return _tags[key] !== undefined;
-           });
-         }
+         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);
 
-         function revert(d3_event, d) {
-           d3_event.stopPropagation();
-           d3_event.preventDefault();
-           if (!entityIDs || _locked) return;
-           dispatch$1.call('revert', d, d.keys);
-         }
+           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);
 
-         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);
-         }
+             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);
+             });
+           }
+         };
 
-         field.render = function (selection) {
-           var container = selection.selectAll('.form-field').data([field]); // Enter
+         var _editMenu = uiEditMenu(context);
 
-           var enter = container.enter().append('div').attr('class', function (d) {
-             return 'form-field form-field-' + d.safeid;
-           }).classed('nowrap', !options.wrap);
+         ui.editMenu = function () {
+           return _editMenu;
+         };
 
-           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');
+         ui.showEditMenu = function (anchorPoint, triggerType, operations) {
+           // remove any displayed menu
+           ui.closeEditMenu();
+           if (!operations && context.mode().operations) operations = context.mode().operations();
+           if (!operations || !operations.length) return; // disable menu if in wide selection, for example
 
-             if (options.remove) {
-               labelEnter.append('button').attr('class', 'remove-icon').attr('title', _t('icons.remove')).call(svgIcon('#iD-operation-delete'));
-             }
+           if (!context.map().editableDataEnabled()) return;
+           var surfaceNode = context.surface().node();
 
-             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
+           if (surfaceNode.focus) {
+             // FF doesn't support it
+             // focus the surface or else clicking off the menu may not trigger modeBrowse
+             surfaceNode.focus();
+           }
 
+           operations.forEach(function (operation) {
+             if (operation.point) operation.point(anchorPoint);
+           });
 
-           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);
+           _editMenu.anchorLoc(anchorPoint).triggerType(triggerType).operations(operations); // render the menu
 
-             if (!d.impl) {
-               createField();
-             }
 
-             var reference, help; // instantiate field help
+           context.map().supersurface.call(_editMenu);
+         };
 
-             if (options.wrap && field.type === 'restrictions') {
-               help = uiFieldHelp(context, 'restrictions');
-             } // instantiate tag reference
+         ui.closeEditMenu = function () {
+           // remove any existing menu no matter how it was added
+           context.map().supersurface.select('.edit-menu').remove();
+         };
 
+         var _saveLoading = select(null);
 
-             if (options.wrap && options.info) {
-               var referenceKey = d.key || '';
+         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 (d.type === 'multiCombo') {
-                 // lookup key without the trailing ':'
-                 referenceKey = referenceKey.replace(/:$/, '');
-               }
+           _saveLoading = select(null);
+         });
+         return ui;
+       }
 
-               reference = uiTagReference(d.reference || {
-                 key: referenceKey
-               });
+       function coreContext() {
+         var _this = this;
 
-               if (_state === 'hover') {
-                 reference.showing(false);
-               }
-             }
+         var dispatch = dispatch$8('enter', 'exit', 'change');
+         var context = utilRebind({}, dispatch, 'on');
 
-             selection.call(d.impl); // add field help components
+         var _deferred = new Set();
 
-             if (help) {
-               selection.call(help.body).select('.field-label').call(help.button);
-             } // add tag reference components
+         context.version = '2.20.1';
+         context.privacyVersion = '20201202'; // iD will alter the hash so cache the parameters intended to setup the session
 
+         context.initialHashParams = window.location.hash ? utilStringQs(window.location.hash) : {};
+         context.isFirstSession = !corePreferences('sawSplash') && !corePreferences('sawPrivacyVersion');
+         /* Changeset */
+         // An osmChangeset object. Not loaded until needed.
 
-             if (reference) {
-               selection.call(reference.body).select('.field-label').call(reference.button);
-             }
+         context.changeset = null;
+         var _defaultChangesetComment = context.initialHashParams.comment;
+         var _defaultChangesetSource = context.initialHashParams.source;
+         var _defaultChangesetHashtags = context.initialHashParams.hashtags;
 
-             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
+         context.defaultChangesetComment = function (val) {
+           if (!arguments.length) return _defaultChangesetComment;
+           _defaultChangesetComment = val;
+           return context;
+         };
 
-           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);
+         context.defaultChangesetSource = function (val) {
+           if (!arguments.length) return _defaultChangesetSource;
+           _defaultChangesetSource = val;
+           return context;
          };
 
-         field.state = function (val) {
-           if (!arguments.length) return _state;
-           _state = val;
-           return field;
+         context.defaultChangesetHashtags = function (val) {
+           if (!arguments.length) return _defaultChangesetHashtags;
+           _defaultChangesetHashtags = val;
+           return context;
          };
+         /* Document title */
 
-         field.tags = function (val) {
-           if (!arguments.length) return _tags;
-           _tags = val;
+         /* (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 (tagsContainFieldKey() && !_show) {
-             // always show a field if it has a value to display
-             _show = true;
 
-             if (!field.impl) {
-               createField();
-             }
-           }
+         var _setsDocumentTitle = true;
+
+         context.setsDocumentTitle = function (val) {
+           if (!arguments.length) return _setsDocumentTitle;
+           _setsDocumentTitle = val;
+           return context;
+         }; // The part of the title that is always the same
 
-           return field;
-         };
 
-         field.locked = function (val) {
-           if (!arguments.length) return _locked;
-           _locked = val;
-           return field;
+         var _documentTitleBase = document.title;
+
+         context.documentTitleBase = function (val) {
+           if (!arguments.length) return _documentTitleBase;
+           _documentTitleBase = val;
+           return context;
          };
+         /* User interface and keybinding */
 
-         field.show = function () {
-           _show = true;
 
-           if (!field.impl) {
-             createField();
-           }
+         var _ui;
 
-           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.ui = function () {
+           return _ui;
+         };
 
+         context.lastPointerType = function () {
+           return _ui.lastPointerType();
+         };
 
-         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 _keybinding = utilKeybinding('context');
 
+         context.keybinding = function () {
+           return _keybinding;
+         };
 
-         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;
+         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`
 
-           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();
+         var _connection = services.osm;
 
-             if (field.countryCodes && field.countryCodes.indexOf(countryCode) === -1) {
-               return false;
-             }
+         var _history;
 
-             if (field.notCountryCodes && field.notCountryCodes.indexOf(countryCode) !== -1) {
-               return false;
-             }
-           }
+         var _validator;
 
-           var prerequisiteTag = field.prerequisiteTag;
+         var _uploader;
 
-           if (entityIDs && !tagsContainFieldKey() && // ignore tagging prerequisites if a value is already present
-           prerequisiteTag) {
-             if (!entityIDs.every(function (entityID) {
-               var entity = context.graph().entity(entityID);
+         context.connection = function () {
+           return _connection;
+         };
 
-               if (prerequisiteTag.key) {
-                 var value = entity.tags[prerequisiteTag.key];
-                 if (!value) return false;
+         context.history = function () {
+           return _history;
+         };
 
-                 if (prerequisiteTag.valueNot) {
-                   return prerequisiteTag.valueNot !== value;
-                 }
+         context.validator = function () {
+           return _validator;
+         };
 
-                 if (prerequisiteTag.value) {
-                   return prerequisiteTag.value === value;
-                 }
-               } else if (prerequisiteTag.keyNot) {
-                 if (entity.tags[prerequisiteTag.keyNot]) return false;
-               }
+         context.uploader = function () {
+           return _uploader;
+         };
+         /* Connection */
 
-               return true;
-             })) return false;
+
+         context.preauth = function (options) {
+           if (_connection) {
+             _connection["switch"](options);
            }
 
-           return true;
+           return context;
          };
+         /* connection options for source switcher (optional) */
 
-         field.focus = function () {
-           if (field.impl) {
-             field.impl.focus();
-           }
-         };
 
-         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());
-         }
+         var _apiConnections;
 
-         return utilRebind(field, dispatch$1, 'on');
-       }
+         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
 
-       function uiFormFields(context) {
-         var moreCombo = uiCombobox(context, 'more-fields').minItems(1);
-         var _fieldsArr = [];
-         var _lastPlaceholder = '';
-         var _state = '';
-         var _klass = '';
 
-         function formFields(selection) {
-           var allowedFields = _fieldsArr.filter(function (field) {
-             return field.isAllowed();
-           });
+         context.locale = function (locale) {
+           if (!arguments.length) return _mainLocalizer.localeCode();
+           _mainLocalizer.preferredLocaleCodes(locale);
+           return context;
+         };
 
-           var shown = allowedFields.filter(function (field) {
-             return field.isShown();
-           });
-           var notShown = allowedFields.filter(function (field) {
-             return !field.isShown();
-           });
-           var container = selection.selectAll('.form-fields-container').data([0]);
-           container = container.enter().append('div').attr('class', 'form-fields-container ' + (_klass || '')).merge(container);
-           var fields = container.selectAll('.wrap-form-field').data(shown, function (d) {
-             return d.id + (d.entityIDs ? d.entityIDs.join() : '');
-           });
-           fields.exit().remove(); // Enter
+         function 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();
+                 }
+               }
 
-           var enter = fields.enter().append('div').attr('class', function (d) {
-             return 'wrap-form-field wrap-form-field-' + d.safeid;
-           }); // Update
+               if (typeof callback === 'function') {
+                 callback(err);
+               }
 
-           fields = fields.merge(enter);
-           fields.order().each(function (d) {
-             select(this).call(d.render);
-           });
-           var titles = [];
-           var moreFields = notShown.map(function (field) {
-             var title = field.title();
-             titles.push(title);
-             var terms = field.terms();
-             if (field.key) terms.push(field.key);
-             if (field.keys) terms = terms.concat(field.keys);
-             return {
-               display: field.label(),
-               value: title,
-               title: title,
-               field: field,
-               terms: terms
-             };
-           });
-           var placeholder = titles.slice(0, 3).join(', ') + (titles.length > 3 ? '…' : '');
-           var more = selection.selectAll('.more-fields').data(_state === 'hover' || moreFields.length === 0 ? [] : [0]);
-           more.exit().remove();
-           var moreEnter = more.enter().append('div').attr('class', 'more-fields').append('label');
-           moreEnter.append('span').html(_t.html('inspector.add_fields'));
-           more = moreEnter.merge(more);
-           var input = more.selectAll('.value').data([0]);
-           input.exit().remove();
-           input = input.enter().append('input').attr('class', 'value').attr('type', 'text').attr('placeholder', placeholder).call(utilNoAuto).merge(input);
-           input.call(utilGetSetValue, '').call(moreCombo.data(moreFields).on('accept', function (d) {
-             if (!d) return; // user entered something that was not matched
+               return;
+             } else if (_connection && _connection.getConnectionId() !== cid) {
+               if (typeof callback === 'function') {
+                 callback({
+                   message: 'Connection Switched',
+                   status: -1
+                 });
+               }
 
-             var field = d.field;
-             field.show();
-             selection.call(formFields); // rerender
+               return;
+             } else {
+               _history.merge(result.data, result.extent);
 
-             field.focus();
-           })); // avoid updating placeholder excessively (triggers style recalc)
+               if (typeof callback === 'function') {
+                 callback(err, result);
+               }
 
-           if (_lastPlaceholder !== placeholder) {
-             input.attr('placeholder', placeholder);
-             _lastPlaceholder = placeholder;
-           }
+               return;
+             }
+           };
          }
 
-         formFields.fieldsArr = function (val) {
-           if (!arguments.length) return _fieldsArr;
-           _fieldsArr = val || [];
-           return formFields;
-         };
+         context.loadTiles = function (projection, callback) {
+           var handle = window.requestIdleCallback(function () {
+             _deferred["delete"](handle);
 
-         formFields.state = function (val) {
-           if (!arguments.length) return _state;
-           _state = val;
-           return formFields;
-         };
+             if (_connection && context.editableDataEnabled()) {
+               var cid = _connection.getConnectionId();
 
-         formFields.klass = function (val) {
-           if (!arguments.length) return _klass;
-           _klass = val;
-           return formFields;
+               _connection.loadTiles(projection, afterLoad(cid, callback));
+             }
+           });
+
+           _deferred.add(handle);
          };
 
-         return formFields;
-       }
+         context.loadTileAtLoc = function (loc, callback) {
+           var handle = window.requestIdleCallback(function () {
+             _deferred["delete"](handle);
 
-       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);
+             if (_connection && context.editableDataEnabled()) {
+               var cid = _connection.getConnectionId();
 
-         var _state;
+               _connection.loadTileAtLoc(loc, afterLoad(cid, callback));
+             }
+           });
 
-         var _fieldsArr;
+           _deferred.add(handle);
+         }; // Download the full entity and its parent relations. The callback may be called multiple times.
 
-         var _presets = [];
 
-         var _tags;
+         context.loadEntity = function (entityID, callback) {
+           if (_connection) {
+             var cid = _connection.getConnectionId();
 
-         var _entityIDs;
+             _connection.loadEntity(entityID, afterLoad(cid, callback)); // We need to fetch the parent relations separately.
 
-         function renderDisclosureContent(selection) {
-           if (!_fieldsArr) {
-             var graph = context.graph();
-             var geometries = Object.keys(_entityIDs.reduce(function (geoms, entityID) {
-               geoms[graph.entity(entityID).geometry(graph)] = true;
-               return geoms;
-             }, {}));
-             var presetsManager = _mainPresetIndex;
-             var allFields = [];
-             var allMoreFields = [];
-             var sharedTotalFields;
 
-             _presets.forEach(function (preset) {
-               var fields = preset.fields();
-               var moreFields = preset.moreFields();
-               allFields = utilArrayUnion(allFields, fields);
-               allMoreFields = utilArrayUnion(allMoreFields, moreFields);
+             _connection.loadEntityRelations(entityID, afterLoad(cid, callback));
+           }
+         };
 
-               if (!sharedTotalFields) {
-                 sharedTotalFields = utilArrayUnion(fields, moreFields);
-               } else {
-                 sharedTotalFields = sharedTotalFields.filter(function (field) {
-                   return fields.indexOf(field) !== -1 || moreFields.indexOf(field) !== -1;
-                 });
-               }
-             });
+         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;
 
-             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]);
+             if (zoomTo !== false) {
+               var entity = result.data.find(function (e) {
+                 return e.id === entityID;
+               });
 
-             if (singularEntity && singularEntity.isHighwayIntersection(graph) && presetsManager.field('restrictions')) {
-               _fieldsArr.push(uiField(context, presetsManager.field('restrictions'), _entityIDs));
+               if (entity) {
+                 _map.zoomTo(entity);
+               }
              }
+           });
 
-             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
-                 }));
-               }
-             });
+           _map.on('drawn.zoomToEntity', function () {
+             if (!context.hasEntity(entityID)) return;
 
-             _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);
-               });
-             });
-           }
+             _map.on('drawn.zoomToEntity', null);
 
-           _fieldsArr.forEach(function (field) {
-             field.state(_state).tags(_tags);
+             context.on('enter.zoomToEntity', null);
+             context.enter(modeSelect(context, [entityID]));
            });
 
-           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));
+           context.on('enter.zoomToEntity', function () {
+             if (_mode.id !== 'browse') {
+               _map.on('drawn.zoomToEntity', null);
+
+               context.on('enter.zoomToEntity', null);
              }
            });
-         }
+         };
 
-         section.presets = function (val) {
-           if (!arguments.length) return _presets;
+         var _minEditableZoom = 16;
 
-           if (!_presets || !val || !utilArrayIdentical(_presets, val)) {
-             _presets = val;
-             _fieldsArr = null;
+         context.minEditableZoom = function (val) {
+           if (!arguments.length) return _minEditableZoom;
+           _minEditableZoom = val;
+
+           if (_connection) {
+             _connection.tileZoom(val);
            }
 
-           return section;
-         };
+           return context;
+         }; // String length limits in Unicode characters, not JavaScript UTF-16 code units
 
-         section.state = function (val) {
-           if (!arguments.length) return _state;
-           _state = val;
-           return section;
+
+         context.maxCharsForTagKey = function () {
+           return 255;
          };
 
-         section.tags = function (val) {
-           if (!arguments.length) return _tags;
-           _tags = val; // Don't reset _fieldsArr here.
+         context.maxCharsForTagValue = function () {
+           return 255;
+         };
 
-           return section;
+         context.maxCharsForRelationRole = function () {
+           return 255;
          };
 
-         section.entityIDs = function (val) {
-           if (!arguments.length) return _entityIDs;
+         function cleanOsmString(val, maxChars) {
+           // be lenient with input
+           if (val === undefined || val === null) {
+             val = '';
+           } else {
+             val = val.toString();
+           } // remove whitespace
 
-           if (!val || !_entityIDs || !utilArrayIdentical(_entityIDs, val)) {
-             _entityIDs = val;
-             _fieldsArr = null;
-           }
 
-           return section;
+           val = val.trim(); // use the canonical form of the string
+
+           if (val.normalize) val = val.normalize('NFC'); // trim to the number of allowed characters
+
+           return utilUnicodeCharsTruncated(val, maxChars);
+         }
+
+         context.cleanTagKey = function (val) {
+           return cleanOsmString(val, context.maxCharsForTagKey());
          };
 
-         return utilRebind(section, dispatch$1, 'on');
-       }
+         context.cleanTagValue = function (val) {
+           return cleanOsmString(val, context.maxCharsForTagValue());
+         };
 
-       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.cleanRelationRole = function (val) {
+           return cleanOsmString(val, context.maxCharsForRelationRole());
+         };
+         /* History */
 
-         var _entityIDs;
 
-         var _maxMembers = 1000;
+         var _inIntro = false;
 
-         function downloadMember(d3_event, d) {
-           d3_event.preventDefault(); // display the loading indicator
+         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
 
-           select(this.parentNode).classed('tag-reference-loading', true);
-           context.loadEntity(d.id, function () {
-             section.reRender();
-           });
-         }
 
-         function zoomToMember(d3_event, d) {
-           d3_event.preventDefault();
-           var entity = context.entity(d.id);
-           context.map().zoomToEase(entity); // highlight the feature in case it wasn't previously on-screen
+         context.save = function () {
+           // no history save, no message onbeforeunload
+           if (_inIntro || context.container().select('.modal').size()) return;
+           var canSave;
 
-           utilHighlightEntities([d.id], true, context);
-         }
+           if (_mode && _mode.id === 'save') {
+             canSave = false; // Attempt to prevent user from creating duplicate changes - see #5200
 
-         function selectMember(d3_event, d) {
-           d3_event.preventDefault(); // remove the hover-highlight styling
+             if (services.osm && services.osm.isChangesetInflight()) {
+               _history.clearSaved();
 
-           utilHighlightEntities([d.id], false, context);
-           var entity = context.entity(d.id);
-           var mapExtent = context.map().extent();
+               return;
+             }
+           } else {
+             canSave = context.selectedIDs().every(function (id) {
+               var entity = context.hasEntity(id);
+               return entity && !entity.isDegenerate();
+             });
+           }
 
-           if (!entity.intersects(mapExtent, context.graph())) {
-             // zoom to the entity if its extent is not visible now
-             context.map().zoomToEase(entity);
+           if (canSave) {
+             _history.save();
            }
 
-           context.enter(modeSelect(context, [d.id]));
-         }
+           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).
 
-         function changeRole(d3_event, d) {
-           var oldRole = d.role;
-           var newRole = context.cleanRelationRole(select(this).property('value'));
 
-           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();
-           }
+         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);
+         };
+
+         context.entity = function (id) {
+           return _history.graph().entity(id);
+         };
+         /* Modes */
 
-         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();
-           }
-         }
+         var _mode;
 
-         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.mode = function () {
+           return _mode;
+         };
 
-             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);
+         context.enter = function (newMode) {
+           if (_mode) {
+             _mode.exit();
 
-           if (taginfo) {
-             wrapEnter.each(bindTypeahead);
-           } // update
+             dispatch.call('exit', _this, _mode);
+           }
 
+           _mode = newMode;
 
-           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();
+           _mode.enter();
 
-               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;
-                 }
+           dispatch.call('enter', _this, _mode);
+         };
 
-                 return 'translateY(-100%)';
-               } else if (index2 < index && d3_event.y < node.offsetTop + node.offsetHeight) {
-                 if (targetIndex === null || index2 < targetIndex) {
-                   targetIndex = index2;
-                 }
+         context.selectedIDs = function () {
+           return _mode && _mode.selectedIDs && _mode.selectedIDs() || [];
+         };
 
-                 return 'translateY(100%)';
-               }
+         context.activeID = function () {
+           return _mode && _mode.activeID && _mode.activeID();
+         };
 
-               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);
+         var _selectedNoteID;
 
-             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();
-             }
-           }));
+         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 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 = [];
+         var _selectedErrorID;
 
-               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]);
-                 }
-               }
+         context.selectedErrorID = function (errorID) {
+           if (!arguments.length) return _selectedErrorID;
+           _selectedErrorID = errorID;
+           return context;
+         };
+         /* Behaviors */
 
-               return sameletter.concat(other);
-             }
 
-             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.install = function (behavior) {
+           return context.surface().call(behavior);
+         };
 
-               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.uninstall = function (behavior) {
+           return context.surface().call(behavior.off);
+         };
+         /* Copy/Paste */
 
-               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 unbind() {
-             var row = select(this);
-             row.selectAll('input.member-role').call(uiCombobox.off, context);
-           }
-         }
+         var _copyGraph;
 
-         section.entityIDs = function (val) {
-           if (!arguments.length) return _entityIDs;
-           _entityIDs = val;
-           return section;
+         context.copyGraph = function () {
+           return _copyGraph;
          };
 
-         return section;
-       }
+         var _copyIDs = [];
 
-       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;
-           });
+         context.copyIDs = function (val) {
+           if (!arguments.length) return _copyIDs;
+           _copyIDs = val;
+           _copyGraph = _history.graph();
+           return context;
+         };
 
-           for (var i in memberIndexes) {
-             graph = actionDeleteMember(relationId, memberIndexes[i])(graph);
-           }
+         var _copyLonLat;
 
-           return graph;
+         context.copyLonLat = function (val) {
+           if (!arguments.length) return _copyLonLat;
+           _copyLonLat = val;
+           return context;
          };
-       }
+         /* Background */
 
-       function uiSectionRawMembershipEditor(context) {
-         var section = uiSection('raw-membership-editor', context).shouldDisplay(function () {
-           return _entityIDs && _entityIDs.length;
-         }).label(function () {
-           var parents = getSharedParentRelations();
-           var gt = parents.length > _maxMemberships ? '>' : '';
-           var count = gt + parents.slice(0, _maxMemberships).length;
-           return _t('inspector.title_count', {
-             title: _t.html('inspector.relations'),
-             count: count
-           });
-         }).disclosureContent(renderDisclosureContent);
-         var taginfo = services.taginfo;
-         var nearbyCombo = uiCombobox(context, 'parent-relation').minItems(1).fetcher(fetchNearbyRelations).itemsMouseEnter(function (d3_event, d) {
-           if (d.relation) utilHighlightEntities([d.relation.id], true, context);
-         }).itemsMouseLeave(function (d3_event, d) {
-           if (d.relation) utilHighlightEntities([d.relation.id], false, context);
-         });
-         var _inChange = false;
-         var _entityIDs = [];
 
-         var _showBlank;
+         var _background;
 
-         var _maxMemberships = 1000;
+         context.background = function () {
+           return _background;
+         };
+         /* Features */
 
-         function getSharedParentRelations() {
-           var parents = [];
 
-           for (var i = 0; i < _entityIDs.length; i++) {
-             var entity = context.graph().hasEntity(_entityIDs[i]);
-             if (!entity) continue;
+         var _features;
 
-             if (i === 0) {
-               parents = context.graph().parentRelations(entity);
-             } else {
-               parents = utilArrayIntersection(parents, context.graph().parentRelations(entity));
-             }
+         context.features = function () {
+           return _features;
+         };
 
-             if (!parents.length) break;
-           }
+         context.hasHiddenConnections = function (id) {
+           var graph = _history.graph();
 
-           return parents;
-         }
+           var entity = graph.entity(id);
+           return _features.hasHiddenConnections(entity, graph);
+         };
+         /* Photos */
 
-         function getMemberships() {
-           var memberships = [];
-           var relations = getSharedParentRelations().slice(0, _maxMemberships);
-           var isMultiselect = _entityIDs.length > 1;
-           var i, relation, membership, index, member, indexedMember;
 
-           for (i = 0; i < relations.length; i++) {
-             relation = relations[i];
-             membership = {
-               relation: relation,
-               members: [],
-               hash: osmEntity.key(relation)
-             };
+         var _photos;
 
-             for (index = 0; index < relation.members.length; index++) {
-               member = relation.members[index];
+         context.photos = function () {
+           return _photos;
+         };
+         /* Map */
 
-               if (_entityIDs.indexOf(member.id) !== -1) {
-                 indexedMember = Object.assign({}, member, {
-                   index: index
-                 });
-                 membership.members.push(indexedMember);
-                 membership.hash += ',' + index.toString();
 
-                 if (!isMultiselect) {
-                   // For single selections, list one entry per membership per relation.
-                   // For multiselections, list one entry per relation.
-                   memberships.push(membership);
-                   membership = {
-                     relation: relation,
-                     members: [],
-                     hash: osmEntity.key(relation)
-                   };
-                 }
-               }
-             }
+         var _map;
 
-             if (membership.members.length) memberships.push(membership);
-           }
+         context.map = function () {
+           return _map;
+         };
 
-           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.layers = function () {
+           return _map.layers();
+         };
 
-         function selectRelation(d3_event, d) {
-           d3_event.preventDefault(); // remove the hover-highlight styling
+         context.surface = function () {
+           return _map.surface;
+         };
 
-           utilHighlightEntities([d.relation.id], false, context);
-           context.enter(modeSelect(context, [d.relation.id]));
-         }
+         context.editableDataEnabled = function () {
+           return _map.editableDataEnabled();
+         };
 
-         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
+         context.surfaceRect = function () {
+           return _map.surface.node().getBoundingClientRect();
+         };
 
-           utilHighlightEntities([d.relation.id], true, context);
-         }
+         context.editable = function () {
+           // don't allow editing during save
+           var mode = context.mode();
+           if (!mode || mode.id === 'save') return false;
+           return _map.editableDataEnabled();
+         };
+         /* Debug */
 
-         function changeRole(d3_event, d) {
-           if (d === 0) return; // called on newrow (shouldn't happen)
 
-           if (_inChange) return; // avoid accidental recursive call #5731
+         var _debugFlags = {
+           tile: false,
+           // tile boundaries
+           collision: false,
+           // label collision bounding boxes
+           imagery: false,
+           // imagery bounding polygons
+           target: false,
+           // touch targets
+           downloaded: false // downloaded data from osm
 
-           var 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;
-           });
+         };
 
-           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();
-           }
+         context.debugFlags = function () {
+           return _debugFlags;
+         };
 
-           _inChange = false;
-         }
+         context.getDebug = function (flag) {
+           return flag && _debugFlags[flag];
+         };
 
-         function addMembership(d, role) {
-           this.blur(); // avoid keeping focus on the button
+         context.setDebug = function (flag, val) {
+           if (arguments.length === 1) val = true;
+           _debugFlags[flag] = val;
+           dispatch.call('change');
+           return context;
+         };
+         /* Container */
 
-           _showBlank = false;
 
-           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);
-               }
+         var _container = select(null);
 
-               return graph;
-             };
-           }
+         context.container = function (val) {
+           if (!arguments.length) return _container;
+           _container = val;
 
-           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`
+           _container.classed('ideditor', true);
 
-             context.enter(modeSelect(context, [relation.id]).newFeature(true));
-           }
-         }
+           return context;
+         };
 
-         function deleteMembership(d3_event, d) {
-           this.blur(); // avoid keeping focus on the button
+         context.containerNode = function (val) {
+           if (!arguments.length) return context.container().node();
+           context.container(select(val));
+           return context;
+         };
 
-           if (d === 0) return; // called on newrow (shouldn't happen)
-           // remove the hover-highlight styling
+         var _embed;
 
-           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();
-         }
+         context.embed = function (val) {
+           if (!arguments.length) return _embed;
+           _embed = val;
+           return context;
+         };
+         /* Assets */
 
-         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;
-           }
+         var _assetPath = '';
+
+         context.assetPath = function (val) {
+           if (!arguments.length) return _assetPath;
+           _assetPath = val;
+           _mainFileFetcher.assetPath(val);
+           return context;
+         };
 
-           var explicitRelation = q && context.hasEntity(q.toLowerCase());
+         var _assetMap = {};
 
-           if (explicitRelation && explicitRelation.type === 'relation' && explicitRelation.id !== entityID) {
-             // loaded relation is specified explicitly, only show that
-             result.push({
-               relation: explicitRelation,
-               value: baseDisplayLabel(explicitRelation) + ' ' + explicitRelation.id
-             });
-           } else {
-             context.history().intersects(context.map().extent()).forEach(function (entity) {
-               if (entity.type !== 'relation' || entity.id === entityID) return;
-               var value = baseDisplayLabel(entity);
-               if (q && (value + ' ' + entity.id).toLowerCase().indexOf(q.toLowerCase()) === -1) return;
-               result.push({
-                 relation: entity,
-                 value: value
-               });
-             });
-             result.sort(function (a, b) {
-               return osmRelation.creationOrder(a.relation, b.relation);
-             }); // Dedupe identical names by appending relation id - see #2891
+         context.assetMap = function (val) {
+           if (!arguments.length) return _assetMap;
+           _assetMap = val;
+           _mainFileFetcher.assetMap(val);
+           return context;
+         };
 
-             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;
-               });
-             });
-           }
+         context.asset = function (val) {
+           if (/^http(s)?:\/\//i.test(val)) return val;
+           var filename = _assetPath + val;
+           return _assetMap[filename] || filename;
+         };
 
-           result.forEach(function (obj) {
-             obj.title = obj.value;
-           });
-           result.unshift(newRelation);
-           callback(result);
-         }
+         context.imagePath = function (val) {
+           return context.asset("img/".concat(val));
+         };
+         /* reset (aka flush) */
 
-         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
 
-           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
+         context.reset = context.flush = function () {
+           context.debouncedSave.cancel();
+           Array.from(_deferred).forEach(function (handle) {
+             window.cancelIdleCallback(handle);
 
-           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');
+             _deferred["delete"](handle);
            });
-           labelLink.append('span').attr('class', 'member-entity-name').html(function (d) {
-             return utilDisplayName(d.relation);
+           Object.values(services).forEach(function (service) {
+             if (service && typeof service.reset === 'function') {
+               service.reset(context);
+             }
            });
-           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);
+           context.changeset = null;
 
-           if (taginfo) {
-             wrapEnter.each(bindTypeahead);
-           }
+           _validator.reset();
 
-           var newMembership = list.selectAll('.member-row-new').data(_showBlank ? [0] : []); // Exit
+           _features.reset();
 
-           newMembership.exit().remove(); // Enter
+           _history.reset();
 
-           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
+           _uploader.reset(); // don't leave stale state in the inspector
 
-           newMembership = newMembership.merge(newMembershipEnter);
-           newMembership.selectAll('.member-entity-input').on('blur', cancelEntity) // if it wasn't accepted normally, cancel it
-           .call(nearbyCombo.on('accept', acceptEntity).on('cancel', cancelEntity)); // Container for the Add button
 
-           var addRow = selection.selectAll('.add-row').data([0]); // enter
+           context.container().select('.inspector-wrap *').remove();
+           return context;
+         };
+         /* Projections */
 
-           var addRowEnter = addRow.enter().append('div').attr('class', 'add-row');
-           var addRelationButton = addRowEnter.append('button').attr('class', 'add-relation');
-           addRelationButton.call(svgIcon('#iD-icon-plus', 'light'));
-           addRelationButton.call(uiTooltip().title(_t.html('inspector.add_to_relation')).placement(_mainLocalizer.textDirection() === 'ltr' ? 'right' : 'left'));
-           addRowEnter.append('div').attr('class', 'space-value'); // preserve space
 
-           addRowEnter.append('div').attr('class', 'space-buttons'); // preserve space
-           // update
+         context.projection = geoRawMercator();
+         context.curtainProjection = geoRawMercator();
+         /* Init */
 
-           addRow = addRow.merge(addRowEnter);
-           addRow.select('.add-relation').on('click', function () {
-             _showBlank = true;
-             section.reRender();
-             list.selectAll('.member-entity-input').node().focus();
-           });
+         context.init = function () {
+           instantiateInternal();
+           initializeDependents();
+           return context; // Load variables and properties. No property of `context` should be accessed
+           // until this is complete since load statuses are indeterminate. The order
+           // of instantiation shouldn't matter.
 
-           function acceptEntity(d) {
-             if (!d) {
-               cancelEntity();
-               return;
-             } // remove hover-higlighting
+           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.
 
 
-             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);
-           }
+           function initializeDependents() {
+             if (context.initialHashParams.presets) {
+               _mainPresetIndex.addablePresetIDs(new Set(context.initialHashParams.presets.split(',')));
+             }
 
-           function cancelEntity() {
-             var input = newMembership.selectAll('.member-entity-input');
-             input.property('value', ''); // remove hover-higlighting
+             if (context.initialHashParams.locale) {
+               _mainLocalizer.preferredLocaleCodes(context.initialHashParams.locale);
+             } // kick off some async work
 
-             context.surface().selectAll('.highlighted').classed('highlighted', false);
-           }
 
-           function bindTypeahead(d) {
-             var row = select(this);
-             var role = row.selectAll('input.member-role');
-             var origValue = role.property('value');
+             _mainLocalizer.ensureLoaded();
 
-             function sort(value, data) {
-               var sameletter = [];
-               var other = [];
+             _background.ensureLoaded();
 
-               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]);
-                 }
+             _mainPresetIndex.ensureLoaded();
+             Object.values(services).forEach(function (service) {
+               if (service && typeof service.init === 'function') {
+                 service.init();
                }
+             });
 
-               return sameletter.concat(other);
-             }
+             _map.init();
 
-             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));
+             _validator.init();
+
+             _features.init();
+
+             if (services.maprules && context.initialHashParams.maprules) {
+               d3_json(context.initialHashParams.maprules).then(function (mapcss) {
+                 services.maprules.init();
+                 mapcss.forEach(function (mapcssSelector) {
+                   return services.maprules.addRule(mapcssSelector);
+                 });
+               })["catch"](function () {
+                 /* ignore */
                });
-             }).on('cancel', function () {
-               role.property('value', origValue);
-             }));
-           }
+             } // if the container isn't available, e.g. when testing, don't load the UI
 
-           function unbind() {
-             var row = select(this);
-             row.selectAll('input.member-role').call(uiCombobox.off, context);
-           }
-         }
 
-         section.entityIDs = function (val) {
-           if (!arguments.length) return _entityIDs;
-           _entityIDs = val;
-           _showBlank = false;
-           return section;
+             if (!context.container().empty()) {
+               _ui.ensureLoaded().then(function () {
+                 _photos.init();
+               });
+             }
+           }
          };
 
-         return section;
+         return context;
        }
 
-       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
+       // 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 _nsiStatus = 'loading'; // 'loading', 'ok', 'failed'
+
+       var _nsi = {}; // Sometimes we can upgrade a feature tagged like `building=yes` to a better tag.
+
+       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 notNames = /:(colou?r|type|forward|backward|left|right|etymology|pronunciation|wikipedia)$/i; // Exceptions to the branchlike regexes
+
+       var notBranches = /(coop|express|wireless|factory|outlet)/i; // PRIVATE FUNCTIONS
+       // `setNsiSources()`
+       // Adds the sources to iD's filemap so we can start downloading data.
+       //
+
+       function setNsiSources() {
+         var nsiVersion = packageJSON.devDependencies['name-suggestion-index'];
+         var v = vparse(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) {
+           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]
            });
-         }).disclosureContent(renderDisclosureContent);
-         context.history().on('change.selectionList', function (difference) {
-           if (difference) {
-             section.reRender();
-           }
          });
+       } // `loadNsiData()`
+       //  Returns a Promise fulfilled when the other data have been downloaded and processed
+       //
 
-         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 loadNsiData() {
+         return Promise.all([_mainFileFetcher.get('nsi_data'), _mainFileFetcher.get('nsi_dissolved'), _mainFileFetcher.get('nsi_replacements'), _mainFileFetcher.get('nsi_trees')]).then(function (vals) {
+           _nsi = {
+             data: vals[0].nsi,
+             // the raw name-suggestion-index data
+             dissolved: vals[1].dissolved,
+             // list of dissolved items
+             replacements: vals[2].replacements,
+             // trivial old->new qid replacements
+             trees: vals[3].trees,
+             // metadata about trees, main tags
+             kvt: new Map(),
+             // Map (k -> Map (v -> t) )
+             qids: new Map(),
+             // Map (wd/wp tag values -> qids)
+             ids: new Map() // Map (id -> NSI item)
 
-         function deselectEntity(d3_event, entity) {
-           var selectedIDs = _selectedIDs.slice();
+           };
+           _nsi.matcher = new Matcher();
 
-           var index = selectedIDs.indexOf(entity.id);
+           _nsi.matcher.buildMatchIndex(_nsi.data);
 
-           if (index > -1) {
-             selectedIDs.splice(index, 1);
-             context.enter(modeSelect(context, selectedIDs));
-           }
-         }
+           _nsi.matcher.buildLocationIndex(_nsi.data, _mainLocations.loco());
 
-         function renderDisclosureContent(selection) {
-           var list = selection.selectAll('.feature-list').data([0]);
-           list = list.enter().append('ul').attr('class', 'feature-list').merge(list);
+           Object.keys(_nsi.data).forEach(function (tkv) {
+             var category = _nsi.data[tkv];
+             var parts = tkv.split('/', 3); // tkv = "tree/key/value"
 
-           var entities = _selectedIDs.map(function (id) {
-             return context.hasEntity(id);
-           }).filter(Boolean);
+             var t = parts[0];
+             var k = parts[1];
+             var v = parts[2]; // Build a reverse index of keys -> values -> trees present in the name-suggestion-index
+             // Collect primary keys  (e.g. "amenity", "craft", "shop", "man_made", "route", etc)
+             // "amenity": {
+             //   "restaurant": "brands"
+             // }
 
-           var items = list.selectAll('.feature-list-item').data(entities, osmEntity.key);
-           items.exit().remove(); // Enter
+             var vmap = _nsi.kvt.get(k);
 
-           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
+             if (!vmap) {
+               vmap = new Map();
 
-           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);
-           });
-         }
+               _nsi.kvt.set(k, vmap);
+             }
 
-         return section;
-       }
+             vmap.set(v, t);
+             var tree = _nsi.trees[t]; // e.g. "brands", "operators"
 
-       function uiEntityEditor(context) {
-         var dispatch$1 = dispatch('choose');
-         var _state = 'select';
-         var _coalesceChanges = false;
-         var _modified = false;
+             var mainTag = tree.mainTag; // e.g. "brand:wikidata", "operator:wikidata", etc
 
-         var _base;
+             var items = category.items || [];
+             items.forEach(function (item) {
+               // Remember some useful things for later, cache NSI id -> item
+               item.tkv = tkv;
+               item.mainTag = mainTag;
 
-         var _entityIDs;
+               _nsi.ids.set(item.id, item); // Cache Wikidata/Wikipedia values -> qid, for #6416
 
-         var _activePresets = [];
 
-         var _newFeature;
+               var wd = item.tags[mainTag];
+               var wp = item.tags[mainTag.replace('wikidata', 'wikipedia')];
+               if (wd) _nsi.qids.set(wd, wd);
+               if (wp && wd) _nsi.qids.set(wp, wd);
+             });
+           });
+         });
+       } // `gatherKVs()`
+       // Gather all the k/v pairs that we will run through the NSI matcher.
+       // An OSM tags object can contain anything, but only a few tags will be interesting to NSI.
+       //
+       // This function will return the interesting tag pairs like:
+       //   "amenity/restaurant", "man_made/flagpole"
+       // and fallbacks like
+       //   "amenity/yes"
+       // excluding things like
+       //   "tiger:reviewed", "surface", "ref", etc.
+       //
+       // Arguments
+       //   `tags`: `Object` containing the feature's OSM tags
+       // Returns
+       //   `Object` containing kv pairs to test:
+       //   {
+       //     'primary': Set(),
+       //     'alternate': Set()
+       //   }
+       //
 
-         var _sections;
 
-         function entityEditor(selection) {
-           var combinedTags = utilCombinedTags(_entityIDs, context.graph()); // Header
+       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
 
-           var header = selection.selectAll('.header').data([0]); // Enter
+           if (osmkey === 'route_master') osmkey = 'route';
 
-           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
+           var vmap = _nsi.kvt.get(osmkey);
 
-           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
+           if (!vmap) return; // not an interesting key
 
-           var body = selection.selectAll('.inspector-body').data([0]); // Enter
+           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"
 
-           var bodyEnter = body.enter().append('div').attr('class', 'entity-editor inspector-body sep-top'); // Update
+         var preset = _mainPresetIndex.matchTags(tags, 'area');
 
-           body = body.merge(bodyEnter);
+         if (buildingPreset[preset.id]) {
+           alternate.add('building/yes');
+         }
 
-           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)];
-           }
+         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
+       //
 
-           _sections.forEach(function (section) {
-             if (section.entityIDs) {
-               section.entityIDs(_entityIDs);
-             }
 
-             if (section.presets) {
-               section.presets(_activePresets);
-             }
+       function identifyTree(tags) {
+         var unknown;
+         var t; // Check all tags
 
-             if (section.tags) {
-               section.tags(combinedTags);
-             }
+         Object.keys(tags).forEach(function (osmkey) {
+           if (t) return; // found already
 
-             if (section.state) {
-               section.state(_state);
-             }
+           var osmvalue = tags[osmkey];
+           if (!osmvalue) return; // Match a 'route_master' as if it were a 'route' - name-suggestion-index#5184
 
-             body.call(section.render);
-           });
+           if (osmkey === 'route_master') osmkey = 'route';
 
-           context.history().on('change.entity-editor', historyChanged);
+           var vmap = _nsi.kvt.get(osmkey);
 
-           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 (!vmap) return; // this key is not in nsi
 
-             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);
-             }
+           if (osmvalue === 'yes') {
+             unknown = 'unknown';
+           } else {
+             t = vmap.get(osmvalue);
            }
-         } // 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.
+         });
+         return t || unknown || null;
+       } // `gatherNames()`
+       // Gather all the namelike values that we will run through the NSI matcher.
+       // It will gather values primarily from tags `name`, `name:ru`, `flag:name`
+       //  and fallback to alternate tags like `brand`, `brand:ru`, `alt_name`
+       //
+       // Arguments
+       //   `tags`: `Object` containing the feature's OSM tags
+       // Returns
+       //   `Object` containing namelike values to test:
+       //   {
+       //     'primary': Set(),
+       //     'fallbacks': Set()
+       //   }
+       //
 
 
-         function changeTags(entityIDs, changed, onInput) {
-           var actions = [];
+       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,
 
-           for (var i in entityIDs) {
-             var entityID = entityIDs[i];
-             var entity = context.entity(entityID);
-             var tags = Object.assign({}, entity.tags); // shallow copy
+         var t = identifyTree(tags);
+         if (!t) return empty;
 
-             for (var k in changed) {
-               if (!k) continue;
-               var v = changed[k];
+         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
 
-               if (v !== undefined || tags.hasOwnProperty(k)) {
-                 tags[k] = v;
-               }
-             }
+           };
+         } 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"]
 
-             if (!onInput) {
-               tags = utilCleanTags(tags);
-             }
 
-             if (!fastDeepEqual(entity.tags, tags)) {
-               actions.push(actionChangeTags(entityID, tags));
-             }
+         if (tags.name && testNameFragments) {
+           var nameParts = tags.name.split(/[\s\-\/,.]/);
+
+           for (var split = nameParts.length; split > 0; split--) {
+             var name = nameParts.slice(0, split).join(' '); // e.g. "TUI ReiseCenter"
+
+             primary.add(name);
            }
+         } // Check all tags
 
-           if (actions.length) {
-             var combinedAction = function combinedAction(graph) {
-               actions.forEach(function (action) {
-                 graph = action(graph);
-               });
-               return graph;
-             };
 
-             var annotation = _t('operations.change_tags.annotation');
+         Object.keys(tags).forEach(function (osmkey) {
+           var osmvalue = tags[osmkey];
+           if (!osmvalue) return;
 
-             if (_coalesceChanges) {
-               context.overwrite(combinedAction, annotation);
+           if (isNamelike(osmkey, 'primary')) {
+             if (/;/.test(osmvalue)) {
+               foundSemi = true;
              } else {
-               context.perform(combinedAction, annotation);
-               _coalesceChanges = !!onInput;
+               primary.add(osmvalue);
+               alternate["delete"](osmvalue);
              }
-           } // if leaving field (blur event), rerun validation
+           } 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
 
+         if (tags.man_made === 'flagpole' && !primary.size && !alternate.size && !!tags.country) {
+           var osmvalue = tags.country;
 
-           if (!onInput) {
-             context.validator().validate();
+           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.
+
+
+         if (foundSemi) {
+           return empty;
+         } else {
+           return {
+             primary: primary,
+             alternate: alternate
+           };
          }
 
-         function revertTags(keys) {
-           var actions = [];
+         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
+       //
 
-           for (var i in _entityIDs) {
-             var entityID = _entityIDs[i];
-             var original = context.graph().base().entities[entityID];
-             var changed = {};
 
-             for (var j in keys) {
-               var key = keys[j];
-               changed[key] = original ? original.tags[key] : undefined;
-             }
+       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`: The tags the the feature should have, or `null` if no changes needed
+       //
 
-             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];
+       function _upgradeTags(tags, loc) {
+         var newTags = Object.assign({}, tags); // shallow copy
 
-               if (v !== undefined || tags.hasOwnProperty(k)) {
-                 tags[k] = v;
-               }
-             }
+         var changed = false; // Before anything, perform trivial Wikipedia/Wikidata replacements
 
-             tags = utilCleanTags(tags);
+         Object.keys(newTags).forEach(function (osmkey) {
+           var matchTag = osmkey.match(/^(\w+:)?wikidata$/);
 
-             if (!fastDeepEqual(entity.tags, tags)) {
-               actions.push(actionChangeTags(entityID, tags));
-             }
-           }
+           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 (actions.length) {
-             var combinedAction = function combinedAction(graph) {
-               actions.forEach(function (action) {
-                 graph = action(graph);
-               });
-               return graph;
-             };
+             if (replace && replace.wikidata !== undefined) {
+               // replace or delete `*:wikidata` tag
+               changed = true;
 
-             var annotation = _t('operations.change_tags.annotation');
+               if (replace.wikidata) {
+                 newTags[osmkey] = replace.wikidata;
+               } else {
+                 delete newTags[osmkey];
+               }
+             }
 
-             if (_coalesceChanges) {
-               context.overwrite(combinedAction, annotation);
-             } else {
-               context.perform(combinedAction, annotation);
-               _coalesceChanges = false;
+             if (replace && replace.wikipedia !== undefined) {
+               // replace or delete `*:wikipedia` tag
+               changed = true;
+               var wpkey = "".concat(prefix, "wikipedia");
+
+               if (replace.wikipedia) {
+                 newTags[wpkey] = replace.wikipedia;
+               } else {
+                 delete newTags[wpkey];
+               }
              }
            }
+         }); // Match a 'route_master' as if it were a 'route' - name-suggestion-index#5184
 
-           context.validator().validate();
-         }
+         var isRouteMaster = tags.type === 'route_master'; // Gather key/value tag pairs to try to match
 
-         entityEditor.modified = function (val) {
-           if (!arguments.length) return _modified;
-           _modified = val;
-           return entityEditor;
-         };
+         var tryKVs = gatherKVs(tags);
+         if (!tryKVs.primary.size && !tryKVs.alternate.size) return changed ? newTags : null; // Gather namelike tag values to try to match
 
-         entityEditor.state = function (val) {
-           if (!arguments.length) return _state;
-           _state = val;
-           return entityEditor;
-         };
+         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`.
 
-         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
+         var foundQID = _nsi.qids.get(tags.wikidata) || _nsi.qids.get(tags.wikipedia);
 
-           _base = context.graph();
-           _coalesceChanges = false;
-           if (val && _entityIDs && utilArrayIdentical(_entityIDs, val)) return entityEditor; // exit early if no change
+         if (foundQID) tryNames.primary.add(foundQID); // matcher will recognize the Wikidata QID as name too
 
-           _entityIDs = val;
-           loadActivePresets(true);
-           return entityEditor.modified(false);
-         };
+         if (!tryNames.primary.size && !tryNames.alternate.size) return changed ? newTags : null; // Order the [key,value,name] tuples - test primary before alternate
 
-         entityEditor.newFeature = function (val) {
-           if (!arguments.length) return _newFeature;
-           _newFeature = val;
-           return entityEditor;
-         };
+         var tuples = gatherTuples(tryKVs, tryNames);
 
-         function loadActivePresets(isForNewSelection) {
-           var graph = context.graph();
-           var counts = {};
+         var _loop = function _loop(i) {
+           var tuple = tuples[i];
 
-           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 hits = _nsi.matcher.match(tuple.k, tuple.v, tuple.n, loc); // Attempt to match an item in NSI
 
-           var matches = Object.keys(counts).sort(function (p1, p2) {
-             return counts[p2] - counts[p1];
-           }).map(function (pID) {
-             return _mainPresetIndex.item(pID);
-           });
 
-           if (!isForNewSelection) {
-             // A "weak" preset doesn't set any tags. (e.g. "Address")
-             var weakPreset = _activePresets.length === 1 && !_activePresets[0].isFallback() && Object.keys(_activePresets[0].addTags || {}).length === 0; // Don't replace a weak preset with a fallback preset (e.g. "Point")
+           if (!hits || !hits.length) return "continue"; // no match, try next tuple
 
-             if (weakPreset && matches.length === 1 && matches[0].isFallback()) return;
-           }
+           if (hits[0].match !== 'primary' && hits[0].match !== 'alternate') return "break"; // a generic match, stop looking
+           // A match may contain multiple results, the first one is likely the best one for this location
+           // e.g. `['pfk-a54c14', 'kfc-1ff19c', 'kfc-658eea']`
 
-           entityEditor.presets(matches);
-         }
+           var itemID = void 0,
+               item = void 0;
 
-         entityEditor.presets = function (val) {
-           if (!arguments.length) return _activePresets; // don't reload the same preset
+           for (var j = 0; j < hits.length; j++) {
+             var hit = hits[j];
+             itemID = hit.itemID;
+             if (_nsi.dissolved[itemID]) continue; // Don't upgrade to a dissolved item
 
-           if (!utilArrayIdentical(val, _activePresets)) {
-             _activePresets = val;
-           }
+             item = _nsi.ids.get(itemID);
+             if (!item) continue;
+             var mainTag = item.mainTag; // e.g. `brand:wikidata`
 
-           return entityEditor;
-         };
+             var itemQID = item.tags[mainTag]; // e.g. `brand:wikidata` qid
 
-         return utilRebind(entityEditor, dispatch$1, 'on');
-       }
+             var notQID = newTags["not:".concat(mainTag)]; // e.g. `not:brand:wikidata` qid
 
-       function uiPresetList(context) {
-         var dispatch$1 = dispatch('cancel', 'choose');
+             if ( // Exceptions, skip this hit
+             !itemQID || itemQID === notQID || // No `*:wikidata` or matched a `not:*:wikidata`
+             newTags.office && !item.tags.office // feature may be a corporate office for a brand? - #6416
+             ) {
+                 item = null;
+                 continue; // continue looking
+               } else {
+                 break; // use `item`
+               }
+           } // Can't use any of these hits, try next tuple..
 
-         var _entityIDs;
 
-         var _currentPresets;
+           if (!item) return "continue"; // At this point we have matched a canonical item and can suggest tag upgrades..
 
-         var _autofocus = false;
+           var tkv = item.tkv;
+           var parts = tkv.split('/', 3); // tkv = "tree/key/value"
 
-         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'));
+           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)
 
-           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);
+           var preserveTags = item.preserveTags || properties.preserveTags || []; // These tags can be toplevel tags -or- attributes - so we generally want to preserve existing values - #8615
+           // We'll only _replace_ the tag value if this tag is the toplevel/defining tag for the matched item (`k`)
+
+           ['building', 'emergency', 'internet_access', 'takeaway'].forEach(function (osmkey) {
+             if (k !== osmkey) preserveTags.push("^".concat(osmkey, "$"));
+           });
+           var regexes = preserveTags.map(function (s) {
+             return new RegExp(s, 'i');
+           });
+           var keepTags = {};
+           Object.keys(newTags).forEach(function (osmkey) {
+             if (regexes.some(function (regex) {
+               return regex.test(osmkey);
+             })) {
+               keepTags[osmkey] = newTags[osmkey];
              }
-           }
+           }); // 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 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
+           _nsi.kvt.forEach(function (vmap, k) {
+             if (newTags[k] === 'yes') delete newTags[k];
+           }); // Replace mistagged `wikidata`/`wikipedia` with e.g. `brand:wikidata`/`brand:wikipedia`
 
-               var buttons = list.selectAll('.preset-list-button');
-               if (!buttons.empty()) buttons.nodes()[0].focus();
-             }
-           }
 
-           function keypress(d3_event) {
-             // enter
-             var value = search.property('value');
+           if (foundQID) {
+             delete newTags.wikipedia;
+             delete newTags.wikidata;
+           } // Do the tag upgrade
 
-             if (d3_event.keyCode === 13 && // ↩ Return
-             value.length) {
-               list.selectAll('.preset-list-item:first-child').each(function (d) {
-                 d.choose.call(this);
-               });
-             }
-           }
 
-           function inputevent() {
-             var value = search.property('value');
-             list.classed('filtered', value.length);
-             var extent = combinedEntityExtent();
-             var results, messageText;
+           Object.assign(newTags, item.tags, keepTags); // Swap `route` back to `route_master` - name-suggestion-index#5184
 
-             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');
-             }
+           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`..
 
-             list.call(drawList, results);
-             message.html(messageText);
-           }
 
-           var searchWrap = selection.append('div').attr('class', 'search-header');
-           searchWrap.call(svgIcon('#iD-icon-search', 'pre-text'));
-           var search = searchWrap.append('input').attr('class', 'preset-search-input').attr('placeholder', _t('inspector.search')).attr('type', 'search').call(utilNoAuto).on('keydown', initialKeydown).on('keypress', keypress).on('input', inputevent);
+           var origName = tags.name;
+           var newName = newTags.name;
 
-           if (_autofocus) {
-             search.node().focus(); // Safari 14 doesn't always like to focus immediately,
-             // so try again on the next pass
+           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
 
-             setTimeout(function () {
-               search.node().focus();
-             }, 0);
-           }
+             if (!isMoved) {
+               // Test name fragments, longest to shortest, to fit them into a "Name Branch" pattern.
+               // e.g. "TUI ReiseCenter - Neuss Innenstadt" -> ["TUI", "ReiseCenter", "Neuss", "Innenstadt"]
+               var nameParts = origName.split(/[\s\-\/,.]/);
 
-           var 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);
-         }
+               for (var split = nameParts.length; split > 0; split--) {
+                 var name = nameParts.slice(0, split).join(' '); // e.g. "TUI ReiseCenter"
 
-         function drawList(list, presets) {
-           presets = presets.matchAllGeometry(entityGeometries());
-           var collection = presets.collection.reduce(function (collection, preset) {
-             if (!preset) return collection;
+                 var branch = nameParts.slice(split).join(' '); // e.g. "Neuss Innenstadt"
 
-             if (preset.members) {
-               if (preset.members.collection.filter(function (preset) {
-                 return preset.addable();
-               }).length > 1) {
-                 collection.push(CategoryItem(preset));
+                 var nameHits = _nsi.matcher.match(k, v, name, loc);
+
+                 if (!nameHits || !nameHits.length) continue; // no match, try next name fragment
+
+                 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
+
+                       } else {
+                         // "branch" is not noise and not something in NSI
+                         newTags.branch = branch; // Stick it in the `branch` tag..
+                       }
+                     }
+                   }
+
+                   break;
+                 }
                }
-             } else if (preset.addable()) {
-               collection.push(PresetItem(preset));
              }
+           }
 
-             return collection;
-           }, []);
-           var items = list.selectAll('.preset-list-item').data(collection, function (d) {
-             return d.preset.id;
-           });
-           items.order();
-           items.exit().remove();
-           items.enter().append('div').attr('class', function (item) {
-             return 'preset-list-item preset-' + item.preset.id.replace('/', '-');
-           }).classed('current', function (item) {
-             return _currentPresets.indexOf(item.preset) !== -1;
-           }).each(function (item) {
-             select(this).call(item);
-           }).style('opacity', 0).transition().style('opacity', 1);
-           updateForFeatureHiddenState();
+           return {
+             v: newTags
+           };
+         };
+
+         for (var i = 0; i < tuples.length; i++) {
+           var _ret = _loop(i);
+
+           if (_ret === "continue") continue;
+           if (_ret === "break") break;
+           if (_typeof(_ret) === "object") return _ret.v;
          }
 
-         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
+         return changed ? newTags : 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 === utilKeybinding.keyCodes['↓']) {
-             d3_event.preventDefault();
-             d3_event.stopPropagation(); // the next item in the list at the same level
 
-             var nextItem = select(item.node().nextElementSibling); // if there is no next item in this list
+       function _isGenericName(tags) {
+         var n = tags.name;
+         if (!n) return false; // tryNames just contains the `name` tag value and nothing else
 
-             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
+         var tryNames = {
+           primary: new Set([n]),
+           alternate: new Set()
+         }; // Gather key/value tag pairs to try to match
 
-             } else if (select(this).classed('expanded')) {
-               // select the first subitem instead
-               nextItem = item.select('.subgrid .preset-list-item:first-child');
-             }
+         var tryKVs = gatherKVs(tags);
+         if (!tryKVs.primary.size && !tryKVs.alternate.size) return false; // Order the [key,value,name] tuples - test primary before alternate
 
-             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 tuples = gatherTuples(tryKVs, tryNames);
 
-           } else if (d3_event.keyCode === utilKeybinding.keyCodes['↑']) {
-             d3_event.preventDefault();
-             d3_event.stopPropagation(); // the previous item in the list at the same level
+         for (var i = 0; i < tuples.length; i++) {
+           var tuple = tuples[i];
 
-             var previousItem = select(item.node().previousElementSibling); // if there is no previous item in this list
+           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 (previousItem.empty()) {
-               // if there is a parent item
-               if (!parentItem.empty()) {
-                 // the item is the first subitem of a sublist select the parent item
-                 previousItem = parentItem;
-               } // if the previous item is expanded
 
-             } else if (previousItem.select('.preset-list-button').classed('expanded')) {
-               // select the last subitem of the sublist of the previous item
-               previousItem = previousItem.select('.subgrid .preset-list-item:last-child');
-             }
+           if (hits && hits.length && hits[0].match === 'excludeGeneric') return true;
+         }
 
-             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
+         return false;
+       } // PUBLIC INTERFACE
 
-           } 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
+       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';
+           });
 
-           } else if (d3_event.keyCode === utilKeybinding.keyCodes[_mainLocalizer.textDirection() === 'rtl' ? '←' : '→']) {
-             d3_event.preventDefault();
-             d3_event.stopPropagation();
-             item.datum().choose.call(select(this).node());
+           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`: The tags the the feature should have, or `null` if no change
+         //
+         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;
          }
+       };
 
-         function CategoryItem(preset) {
-           var box,
-               sublist,
-               shown = false;
+       var apibase$1 = 'https://openstreetcam.org';
+       var maxResults$1 = 1000;
+       var tileZoom$1 = 14;
+       var tiler$3 = utilTiler().zoomExtent([tileZoom$1, tileZoom$1]).skipNullIsland(true);
+       var dispatch$3 = dispatch$8('loadedImages');
+       var imgZoom = d3_zoom().extent([[0, 0], [320, 240]]).translateExtent([[0, 0], [320, 240]]).scaleExtent([1, 15]);
 
-           function item(selection) {
-             var wrap = selection.append('div').attr('class', 'preset-list-button-wrap category');
+       var _oscCache;
 
-             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();
-             }
+       var _oscSelectedImage;
 
-             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
+       var _loadViewerPromise$1;
 
-                 if (!select(this).classed('expanded')) {
-                   // toggle expansion (expand the item)
-                   click.call(this, d3_event);
-                 } // left arrow, collapse the focused item
+       function abortRequest$3(controller) {
+         controller.abort();
+       }
 
-               } else if (d3_event.keyCode === utilKeybinding.keyCodes[_mainLocalizer.textDirection() === 'rtl' ? '→' : '←']) {
-                 d3_event.preventDefault();
-                 d3_event.stopPropagation(); // if the item is expanded
+       function maxPageAtZoom(z) {
+         if (z < 15) return 2;
+         if (z === 15) return 5;
+         if (z === 16) return 10;
+         if (z === 17) return 20;
+         if (z === 18) return 40;
+         if (z > 18) return 80;
+       }
 
-                 if (select(this).classed('expanded')) {
-                   // toggle expansion (collapse the item)
-                   click.call(this, d3_event);
-                 }
-               } else {
-                 itemKeydown.call(this, d3_event);
-               }
-             });
-             var label = button.append('div').attr('class', 'label').append('div').attr('class', 'label-inner');
-             label.append('div').attr('class', 'namepart').call(svgIcon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward', 'inline')).append('span').html(function () {
-               return preset.nameLabel() + '&hellip;';
-             });
-             box = selection.append('div').attr('class', 'subgrid').style('max-height', '0px').style('opacity', 0);
-             box.append('div').attr('class', 'arrow');
-             sublist = box.append('div').attr('class', 'preset-list fillL3');
+       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 cache = _oscCache[which];
+         Object.keys(cache.inflight).forEach(function (k) {
+           var wanted = tiles.find(function (tile) {
+             return k.indexOf(tile.id + ',') === 0;
+           });
+
+           if (!wanted) {
+             abortRequest$3(cache.inflight[k]);
+             delete cache.inflight[k];
            }
+         });
+         tiles.forEach(function (tile) {
+           loadNextTilePage$1(which, currZoom, url, tile);
+         });
+       }
 
-           item.choose = function () {
-             if (!box || !sublist) return;
+       function loadNextTilePage$1(which, currZoom, url, tile) {
+         var cache = _oscCache[which];
+         var bbox = tile.extent.bbox();
+         var maxPages = maxPageAtZoom(currZoom);
+         var nextPage = cache.nextPage[tile.id] || 1;
+         var params = utilQsString({
+           ipp: maxResults$1,
+           page: nextPage,
+           // client_id: clientId,
+           bbTopLeft: [bbox.maxY, bbox.minX].join(','),
+           bbBottomRight: [bbox.minY, bbox.maxX].join(',')
+         }, true);
+         if (nextPage > maxPages) return;
+         var id = tile.id + ',' + String(nextPage);
+         if (cache.loaded[id] || cache.inflight[id]) return;
+         var controller = new AbortController();
+         cache.inflight[id] = controller;
+         var options = {
+           method: 'POST',
+           signal: controller.signal,
+           body: params,
+           headers: {
+             'Content-Type': 'application/x-www-form-urlencoded'
+           }
+         };
+         d3_json(url, options).then(function (data) {
+           cache.loaded[id] = true;
+           delete cache.inflight[id];
 
-             if (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');
+           if (!data || !data.currentPageItems || !data.currentPageItems.length) {
+             throw new Error('No Data');
+           }
+
+           var features = data.currentPageItems.map(function (item) {
+             var loc = [+item.lng, +item.lat];
+             var d;
+
+             if (which === 'images') {
+               d = {
+                 loc: loc,
+                 key: item.id,
+                 ca: +item.heading,
+                 captured_at: item.shot_date || item.date_added,
+                 captured_by: item.username,
+                 imagePath: item.lth_name,
+                 sequence_id: item.sequence_id,
+                 sequence_index: +item.sequence_index
+               }; // cache sequence info
+
+               var seq = _oscCache.sequences[d.sequence_id];
+
+               if (!seq) {
+                 seq = {
+                   rotation: 0,
+                   images: []
+                 };
+                 _oscCache.sequences[d.sequence_id] = seq;
+               }
+
+               seq.images[d.sequence_index] = d;
+               _oscCache.images.forImageKey[d.key] = d; // cache imageKey -> image
              }
-           };
 
-           item.preset = preset;
-           return item;
-         }
+             return {
+               minX: loc[0],
+               minY: loc[1],
+               maxX: loc[0],
+               maxY: loc[1],
+               data: d
+             };
+           });
+           cache.rtree.load(features);
 
-         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);
+           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
            }
 
-           item.choose = function () {
-             if (select(this).classed('disabled')) return;
+           if (which === 'images') {
+             dispatch$3.call('loadedImages');
+           }
+         })["catch"](function () {
+           cache.loaded[id] = true;
+           delete cache.inflight[id];
+         });
+       } // partition viewport into higher zoom tiles
 
-             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);
-               }
+       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
 
-               return graph;
-             }, _t('operations.change_tags.annotation'));
-             context.validator().validate(); // rerun validation
+         var tiler = utilTiler().zoomExtent([z2, z2]);
+         return tiler.getTiles(projection).map(function (tile) {
+           return tile.extent;
+         });
+       } // no more than `limit` results per partition.
 
-             dispatch$1.call('choose', this, preset);
-           };
 
-           item.help = function (d3_event) {
-             d3_event.stopPropagation();
-             item.reference.toggle();
-           };
+       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;
+         }, []);
+       }
 
-           item.preset = preset;
-           item.reference = uiTagReference(preset.reference());
-           return item;
-         }
+       var serviceOpenstreetcam = {
+         init: function init() {
+           if (!_oscCache) {
+             this.reset();
+           }
+
+           this.event = utilRebind(this, dispatch$3, 'on');
+         },
+         reset: function reset() {
+           if (_oscCache) {
+             Object.values(_oscCache.images.inflight).forEach(abortRequest$3);
+           }
 
-         function updateForFeatureHiddenState() {
-           if (!_entityIDs.every(context.hasEntity)) return;
-           var geometries = entityGeometries();
-           var button = context.container().selectAll('.preset-list .preset-list-button'); // remove existing tooltips
+           _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
 
-           button.call(uiTooltip().destroyAny);
-           button.each(function (item, index) {
-             var hiddenPresetFeaturesId;
+           _oscCache.images.rtree.search(bbox).forEach(function (d) {
+             sequenceKeys[d.data.sequence_id] = true;
+           }); // make linestrings from those sequences
 
-             for (var i in geometries) {
-               hiddenPresetFeaturesId = context.features().isHiddenPreset(item.preset, geometries[i]);
-               if (hiddenPresetFeaturesId) break;
-             }
 
-             var isHiddenPreset = !context.inIntro() && !!hiddenPresetFeaturesId && (_currentPresets.length !== 1 || item.preset !== _currentPresets[0]);
-             select(this).classed('disabled', isHiddenPreset);
+           var lineStrings = [];
+           Object.keys(sequenceKeys).forEach(function (sequenceKey) {
+             var seq = _oscCache.sequences[sequenceKey];
+             var images = seq && seq.images;
 
-             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'));
+             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
+                 }
+               });
              }
            });
-         }
-
-         presetList.autofocus = function (val) {
-           if (!arguments.length) return _autofocus;
-           _autofocus = val;
-           return presetList;
-         };
+           return lineStrings;
+         },
+         cachedImage: function cachedImage(imageKey) {
+           return _oscCache.images.forImageKey[imageKey];
+         },
+         loadImages: function loadImages(projection) {
+           var url = apibase$1 + '/1.0/list/nearby-photos/';
+           loadTiles$1('images', url, projection);
+         },
+         ensureViewerLoaded: function ensureViewerLoaded(context) {
+           if (_loadViewerPromise$1) return _loadViewerPromise$1; // add osc-wrapper
 
-         presetList.entityIDs = function (val) {
-           if (!arguments.length) return _entityIDs;
-           _entityIDs = val;
+           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
 
-           if (_entityIDs && _entityIDs.length) {
-             var presets = _entityIDs.map(function (entityID) {
-               return _mainPresetIndex.match(context.entity(entityID), context.graph());
-             });
+           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);
+           });
 
-             presetList.presets(presets);
+           function zoomPan(d3_event) {
+             var t = d3_event.transform;
+             context.container().select('.photoviewer .osc-image-wrap').call(utilSetTransform, t.x, t.y, t.k);
            }
 
-           return presetList;
-         };
-
-         presetList.presets = function (val) {
-           if (!arguments.length) return _currentPresets;
-           _currentPresets = val;
-           return presetList;
-         };
+           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)');
+             };
+           }
 
-         function entityGeometries() {
-           var counts = {};
+           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
 
-           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 (geometry === 'vertex' && entity.isOnAddressLine(context.graph())) {
-               geometry = 'point';
-             }
+           _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();
 
-             if (!counts[geometry]) counts[geometry] = 0;
-             counts[geometry] += 1;
+           if (isHidden) {
+             viewer.selectAll('.photo-wrapper:not(.osc-wrapper)').classed('hide', true);
+             viewer.selectAll('.photo-wrapper.osc-wrapper').classed('hide', false);
            }
 
-           return Object.keys(counts).sort(function (geom1, geom2) {
-             return counts[geom2] - counts[geom1];
-           });
-         }
-
-         function combinedEntityExtent() {
-           return _entityIDs.reduce(function (extent, entityID) {
-             var entity = context.graph().entity(entityID);
-             return extent.extend(entity.extent(context.graph()));
-           }, geoExtent());
-         }
+           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();
 
-         return utilRebind(presetList, dispatch$1, 'on');
-       }
+           if (d) {
+             var sequence = _oscCache.sequences[d.sequence_id];
+             var r = sequence && sequence.rotation || 0;
+             imageWrap.append('img').attr('class', 'osc-image').attr('src', apibase$1 + '/' + d.imagePath).style('transform', 'rotate(' + r + 'deg)');
 
-       function uiInspector(context) {
-         var presetList = uiPresetList(context);
-         var entityEditor = uiEntityEditor(context);
-         var wrap = select(null),
-             presetPane = select(null),
-             editorPane = select(null);
-         var _state = 'select';
+             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('|');
+             }
 
-         var _entityIDs;
+             if (d.captured_at) {
+               attribution.append('span').attr('class', 'captured_at').html(localeDateString(d.captured_at));
+               attribution.append('span').html('|');
+             }
 
-         var _newFeature = false;
+             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');
+           }
 
-         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');
+           return this;
 
-           function shouldDefaultToPresetList() {
-             // always show the inspector on hover
-             if (_state !== 'select') return false; // can only change preset on single selection
+           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 (_entityIDs.length !== 1) return false;
-             var entityID = _entityIDs[0];
-             var entity = context.hasEntity(entityID);
-             if (!entity) return false; // default to inspector if there are already tags
+           var 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 (entity.hasNonGeometryTags()) return false; // prompt to select preset if feature is new and untagged
+           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
 
-             if (_newFeature) return true; // all existing features except vertices should default to inspector
+           context.container().selectAll('.layer-openstreetcam .viewfield-group .viewfield').attr('d', viewfieldPath);
 
-             if (entity.geometry(context.graph()) !== 'vertex') return false; // show vertex relations if any
+           function viewfieldPath() {
+             var d = this.parentNode.__data__;
 
-             if (context.graph().parentRelations(entity).length) return false; // show vertex issues if there are any
+             if (d.pano && d.key !== selectedImageKey) {
+               return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
+             } else {
+               return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
+             }
+           }
 
-             if (context.validator().getEntityIssues(entityID).length) return false; // show turn retriction editor for junction vertices
+           return this;
+         },
+         updateUrlImage: function updateUrlImage(imageKey) {
+           if (!window.mocha) {
+             var hash = utilStringQs(window.location.hash);
 
-             if (entity.isHighwayIntersection(context.graph())) return false; // otherwise show preset list for uninteresting vertices
+             if (imageKey) {
+               hash.photo = 'openstreetcam/' + imageKey;
+             } else {
+               delete hash.photo;
+             }
 
-             return true;
+             window.location.replace('#' + utilQsString(hash, true));
            }
+         },
+         cache: function cache() {
+           return _oscCache;
+         }
+       };
 
-           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);
-           }
+       var hashes = createCommonjsModule(function (module, exports) {
+         (function () {
+           var Hashes;
 
-           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 utf8Encode(str) {
+             var x,
+                 y,
+                 output = '',
+                 i = -1,
+                 l;
 
-         inspector.showList = function (presets) {
-           presetPane.classed('hide', false);
-           wrap.transition().styleTween('right', function () {
-             return interpolate('0%', '-100%');
-           }).on('end', function () {
-             editorPane.classed('hide', true);
-           });
+             if (str && str.length) {
+               l = str.length;
 
-           if (presets) {
-             presetList.presets(presets);
-           }
+               while ((i += 1) < l) {
+                 /* Decode utf-16 surrogate pairs */
+                 x = str.charCodeAt(i);
+                 y = i + 1 < l ? str.charCodeAt(i + 1) : 0;
 
-           presetPane.call(presetList.autofocus(true));
-         };
+                 if (0xD800 <= x && x <= 0xDBFF && 0xDC00 <= y && y <= 0xDFFF) {
+                   x = 0x10000 + ((x & 0x03FF) << 10) + (y & 0x03FF);
+                   i += 1;
+                 }
+                 /* Encode output as utf-8 */
 
-         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);
-             });
 
-             if (preset) {
-               entityEditor.presets([preset]);
+                 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);
+                 }
+               }
              }
 
-             editorPane.call(entityEditor);
+             return output;
            }
-         };
-
-         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;
-         };
 
-         inspector.entityIDs = function (val) {
-           if (!arguments.length) return _entityIDs;
-           _entityIDs = val;
-           return inspector;
-         };
+           function utf8Decode(str) {
+             var i,
+                 ac,
+                 c1,
+                 c2,
+                 c3,
+                 arr = [],
+                 l;
+             i = ac = c1 = c2 = c3 = 0;
 
-         inspector.newFeature = function (val) {
-           if (!arguments.length) return _newFeature;
-           _newFeature = val;
-           return inspector;
-         };
+             if (str && str.length) {
+               l = str.length;
+               str += '';
 
-         return inspector;
-       }
+               while (i < l) {
+                 c1 = str.charCodeAt(i);
+                 ac += 1;
 
-       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);
+                 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 _current;
+             return arr.join('');
+           }
+           /**
+            * Add integers, wrapping at 2^32. This uses 16-bit operations internally
+            * to work around bugs in some JS interpreters.
+            */
 
-         var _wasData = false;
-         var _wasNote = false;
-         var _wasQaItem = false; // use pointer events on supported platforms; fallback to mouse events
 
-         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+           function 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.
+            */
 
-         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 bit_rol(num, cnt) {
+             return num << cnt | num >>> 32 - cnt;
+           }
+           /**
+            * Convert a raw string to a hex string
+            */
 
-           function pointerdown(d3_event) {
-             if (downPointerId) return;
-             if ('button' in d3_event && d3_event.button !== 0) return;
-             downPointerId = d3_event.pointerId || 'mouse';
-             lastClientX = d3_event.clientX;
-             containerLocGetter = utilFastMouse(container.node()); // offset from edge of sidebar-resizer
 
-             dragOffset = utilFastMouse(resizer.node())(d3_event)[0] - 1;
-             sidebarWidth = selection.node().getBoundingClientRect().width;
-             containerWidth = container.node().getBoundingClientRect().width;
-             var widthPct = sidebarWidth / containerWidth * 100;
-             selection.style('width', widthPct + '%') // lock in current width
-             .style('max-width', '85%'); // but allow larger widths
+           function rstr2hex(input, hexcase) {
+             var hex_tab = hexcase ? '0123456789ABCDEF' : '0123456789abcdef',
+                 output = '',
+                 x,
+                 i = 0,
+                 l = input.length;
 
-             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);
+             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
+            */
 
-           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 binb2rstr(input) {
+             var i,
+                 l = input.length * 32,
+                 output = '';
 
-               if (isCollapsed) {
-                 context.ui().onResize([-sidebarWidth * scaleX, 0]);
-               } else {
-                 context.ui().onResize([-dx * scaleX, 0]);
-               }
+             for (i = 0; i < l; i += 8) {
+               output += String.fromCharCode(input[i >> 5] >>> 24 - i % 32 & 0xFF);
              }
-           }
 
-           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);
+             return output;
            }
+           /**
+            * Convert an array of little-endian words to a string
+            */
 
-           var featureListWrap = selection.append('div').attr('class', 'feature-list-pane').call(uiFeatureList(context));
-           var inspectorWrap = selection.append('div').attr('class', 'inspector-hidden inspector-wrap');
-
-           var hoverModeSelect = function hoverModeSelect(targets) {
-             context.container().selectAll('.feature-list-item button').classed('hover', false);
 
-             if (context.selectedIDs().length > 1 && targets && targets.length) {
-               var elements = context.container().selectAll('.feature-list-item button').filter(function (node) {
-                 return targets.indexOf(node) !== -1;
-               });
+           function binl2rstr(input) {
+             var i,
+                 l = input.length * 32,
+                 output = '';
 
-               if (!elements.empty()) {
-                 elements.classed('hover', true);
-               }
+             for (i = 0; i < l; i += 8) {
+               output += String.fromCharCode(input[i >> 5] >>> i % 32 & 0xFF);
              }
-           };
 
-           sidebar.hoverModeSelect = throttle(hoverModeSelect, 200);
-
-           function hover(targets) {
-             var datum = targets && targets.length && targets[0];
+             return output;
+           }
+           /**
+            * Convert a raw string to an array of little-endian words
+            * Characters >255 have their high-byte silently ignored.
+            */
 
-             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;
 
-               if (osm) {
-                 datum = osm.getNote(datum.id); // marker may contain stale data - get latest
-               }
+           function rstr2binl(input) {
+             var i,
+                 l = input.length * 8,
+                 output = Array(input.length >> 2),
+                 lo = output.length;
 
-               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];
+             for (i = 0; i < lo; i += 1) {
+               output[i] = 0;
+             }
 
-               if (errService) {
-                 // marker may contain stale data - get latest
-                 datum = errService.getError(datum.id);
-               } // Currently only three possible services
+             for (i = 0; i < l; i += 8) {
+               output[i >> 5] |= (input.charCodeAt(i / 8) & 0xFF) << i % 32;
+             }
 
+             return output;
+           }
+           /**
+            * Convert a raw string to an array of big-endian words
+            * Characters >255 have their high-byte silently ignored.
+            */
 
-               var errEditor;
 
-               if (datum.service === 'keepRight') {
-                 errEditor = keepRightEditor;
-               } else if (datum.service === 'osmose') {
-                 errEditor = osmoseEditor;
-               } else {
-                 errEditor = improveOsmEditor;
-               }
+           function rstr2binb(input) {
+             var i,
+                 l = input.length * 8,
+                 output = Array(input.length >> 2),
+                 lo = output.length;
 
-               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 < lo; i += 1) {
+               output[i] = 0;
+             }
 
-               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();
+             for (i = 0; i < l; i += 8) {
+               output[i >> 5] |= (input.charCodeAt(i / 8) & 0xFF) << 24 - i % 32;
              }
+
+             return output;
            }
+           /**
+            * Convert a raw string to an arbitrary string encoding
+            */
 
-           sidebar.hover = throttle(hover, 200);
 
-           sidebar.intersects = function (extent) {
-             var rect = selection.node().getBoundingClientRect();
-             return extent.intersects([context.projection.invert([0, rect.height]), context.projection.invert([rect.width, 0])]);
-           };
+           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 */
 
-           sidebar.select = function (ids, newFeature) {
-             sidebar.hide();
+             dividend = Array(Math.ceil(input.length / 2));
+             ld = dividend.length;
 
-             if (ids && ids.length) {
-               var entity = ids.length === 1 && context.entity(ids[0]);
+             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.
+              */
 
-               if (entity && newFeature && selection.classed('collapsed')) {
-                 // uncollapse the sidebar
-                 var extent = entity.extent(context.graph());
-                 sidebar.expand(sidebar.intersects(extent));
-               }
 
-               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
+             while (dividend.length > 0) {
+               quotient = Array();
+               x = 0;
 
-               inspector.state('select').entityIDs(ids).newFeature(newFeature);
-               inspectorWrap.call(inspector);
-             } else {
-               inspector.state('hide');
-             }
-           };
+               for (i = 0; i < dividend.length; i += 1) {
+                 x = (x << 16) + dividend[i];
+                 q = Math.floor(x / divisor);
+                 x -= q * divisor;
 
-           sidebar.showPresetList = function () {
-             inspector.showList();
-           };
+                 if (quotient.length > 0 || q > 0) {
+                   quotient[quotient.length] = q;
+                 }
+               }
 
-           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);
-           };
+               remainders[remainders.length] = x;
+               dividend = quotient;
+             }
+             /* Convert the remainders to the output string */
 
-           sidebar.hide = function () {
-             featureListWrap.classed('inspector-hidden', false);
-             inspectorWrap.classed('inspector-hidden', true);
-             if (_current) _current.remove();
-             _current = null;
-           };
 
-           sidebar.expand = function (moveMap) {
-             if (selection.classed('collapsed')) {
-               sidebar.toggle(moveMap);
-             }
-           };
+             output = '';
 
-           sidebar.collapse = function (moveMap) {
-             if (!selection.classed('collapsed')) {
-               sidebar.toggle(moveMap);
+             for (i = remainders.length - 1; i >= 0; i--) {
+               output += encoding.charAt(remainders[i]);
              }
-           };
+             /* Append leading zero equivalents */
 
-           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
 
-             selection.style('width', sidebarWidth + 'px');
-             var startMargin, endMargin, lastMargin;
+             full_length = Math.ceil(input.length * 8 / (Math.log(encoding.length) / Math.log(2)));
 
-             if (isCollapsing) {
-               startMargin = lastMargin = 0;
-               endMargin = -sidebarWidth;
-             } else {
-               startMargin = lastMargin = -sidebarWidth;
-               endMargin = 0;
+             for (i = output.length; i < full_length; i += 1) {
+               output = encoding[0] + output;
              }
 
-             if (!isCollapsing) {
-               // unhide the sidebar's content before it transitions onscreen
-               selection.classed('collapsed', isCollapsing);
-             }
+             return output;
+           }
+           /**
+            * Convert a raw string to a base-64 string
+            */
 
-             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 %
 
+           function rstr2b64(input, b64pad) {
+             var tab = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/',
+                 output = '',
+                 len = input.length,
+                 i,
+                 j,
+                 triplet;
+             b64pad = b64pad || '=';
 
-               if (!isCollapsing) {
-                 var containerWidth = container.node().getBoundingClientRect().width;
-                 var widthPct = sidebarWidth / containerWidth * 100;
-                 selection.style(xMarginProperty, null).style('width', widthPct + '%');
+             for (i = 0; i < len; i += 3) {
+               triplet = input.charCodeAt(i) << 16 | (i + 1 < len ? input.charCodeAt(i + 1) << 8 : 0) | (i + 2 < len ? input.charCodeAt(i + 2) : 0);
+
+               for (j = 0; j < 4; j += 1) {
+                 if (i * 8 + j * 6 > input.length * 8) {
+                   output += b64pad;
+                 } else {
+                   output += tab.charAt(triplet >>> 6 * (3 - j) & 0x3F);
+                 }
                }
-             });
-           }; // toggle the sidebar collapse when double-clicking the resizer
+             }
 
+             return output;
+           }
 
-           resizer.on('dblclick', function (d3_event) {
-             d3_event.preventDefault();
+           Hashes = {
+             /**
+              * @property {String} version
+              * @readonly
+              */
+             VERSION: '1.0.6',
 
-             if (d3_event.sourceEvent) {
-               d3_event.sourceEvent.preventDefault();
-             }
+             /**
+              * @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.toggle();
-           }); // ensure hover sidebar is closed when zooming out beyond editable zoom
+               this.encode = function (input) {
+                 var i,
+                     j,
+                     triplet,
+                     output = '',
+                     len = input.length;
+                 pad = pad || '=';
+                 input = utf8 ? utf8Encode(input) : input;
 
-           context.map().on('crossEditableZoom.sidebar', function (within) {
-             if (!within && !selection.select('.inspector-hover').empty()) {
-               hover([]);
-             }
-           });
-         }
+                 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);
 
-         sidebar.showPresetList = function () {};
+                   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);
+                     }
+                   }
+                 }
 
-         sidebar.hover = function () {};
+                 return output;
+               }; // public method for decoding
 
-         sidebar.hover.cancel = function () {};
 
-         sidebar.intersects = function () {};
+               this.decode = function (input) {
+                 // var b64 = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
+                 var i,
+                     o1,
+                     o2,
+                     o3,
+                     h1,
+                     h2,
+                     h3,
+                     h4,
+                     bits,
+                     ac,
+                     dec = '',
+                     arr = [];
 
-         sidebar.select = function () {};
+                 if (!input) {
+                   return input;
+                 }
 
-         sidebar.show = function () {};
+                 i = ac = 0;
+                 input = input.replace(new RegExp('\\' + pad, 'gi'), ''); // use '='
+                 //input += '';
 
-         sidebar.hide = function () {};
+                 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.expand = function () {};
+                   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.collapse = function () {};
+                 dec = arr.join('');
+                 dec = utf8 ? utf8Decode(dec) : dec;
+                 return dec;
+               }; // set custom pad string
 
-         sidebar.toggle = function () {};
 
-         return sidebar;
-       }
+               this.setPad = function (str) {
+                 pad = str || pad;
+                 return this;
+               }; // set custom tab string characters
 
-       function uiSourceSwitch(context) {
-         var keys;
 
-         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
+               this.setTab = function (str) {
+                 tab = str || tab;
+                 return this;
+               };
 
-           context.flush(); // remove stored data
+               this.setUTF8 = function (bool) {
+                 if (typeof bool === 'boolean') {
+                   utf8 = bool;
+                 }
 
-           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)
-         }
+                 return this;
+               };
+             },
 
-         var sourceSwitch = function sourceSwitch(selection) {
-           selection.append('a').attr('href', '#').html(_t.html('source_switch.live')).attr('class', 'live chip').on('click', click);
-         };
+             /**
+              * 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;
 
-         sourceSwitch.keys = function (_) {
-           if (!arguments.length) return keys;
-           keys = _;
-           return sourceSwitch;
-         };
+               for (i = 0, iTop = str.length; i < iTop; i += 1) {
+                 y = (crc ^ str.charCodeAt(i)) & 0xFF;
+                 x = '0x' + table.substr(y * 9, 8);
+                 crc = crc >>> 8 ^ x;
+               } // always return a positive number (that's what >>> 0 does)
 
-         return sourceSwitch;
-       }
 
-       function uiSpinner(context) {
-         var osm = context.connection();
-         return function (selection) {
-           var img = selection.append('img').attr('src', context.imagePath('loader-black.gif')).style('opacity', 0);
+               return (crc ^ -1) >>> 0;
+             },
 
-           if (osm) {
-             osm.on('loading.spinner', function () {
-               img.transition().style('opacity', 1);
-             }).on('loaded.spinner', function () {
-               img.transition().style('opacity', 0);
-             });
-           }
-         };
-       }
+             /**
+              * @member Hashes
+              * @class MD5
+              * @constructor
+              * @param {Object} [config]
+              *
+              * A JavaScript implementation of the RSA Data Security, Inc. MD5 Message
+              * Digest Algorithm, as defined in RFC 1321.
+              * Version 2.2 Copyright (C) Paul Johnston 1999 - 2009
+              * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
+              * See <http://pajhome.org.uk/crypt/md5> for more infHashes.
+              */
+             MD5: function 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 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.
+               this.hex = function (s) {
+                 return rstr2hex(rstr(s), hexcase);
+               };
 
-           var updateMessage = '';
-           var sawPrivacyVersion = corePreferences('sawPrivacyVersion');
-           var showSplash = !corePreferences('sawSplash');
+               this.b64 = function (s) {
+                 return rstr2b64(rstr(s), b64pad);
+               };
 
-           if (sawPrivacyVersion !== context.privacyVersion) {
-             updateMessage = _t('splash.privacy_update');
-             showSplash = true;
-           }
+               this.any = function (s, e) {
+                 return rstr2any(rstr(s), e);
+               };
 
-           if (!showSplash) return;
-           corePreferences('sawSplash', true);
-           corePreferences('sawPrivacyVersion', context.privacyVersion); // fetch intro graph data now, while user is looking at the splash screen
+               this.raw = function (s) {
+                 return rstr(s);
+               };
 
-           _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');
-         };
-       }
+               this.hex_hmac = function (k, d) {
+                 return rstr2hex(rstr_hmac(k, d), hexcase);
+               };
 
-       function uiStatus(context) {
-         var osm = context.connection();
-         return function (selection) {
-           if (!osm) return;
+               this.b64_hmac = function (k, d) {
+                 return rstr2b64(rstr_hmac(k, d), b64pad);
+               };
 
-           function update(err, apiStatus) {
-             selection.html('');
+               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 (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
+               this.vm_test = function () {
+                 return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
+               };
+               /**
+                * Enable/disable uppercase hexadecimal returned string
+                * @param {Boolean}
+                * @return {Object} this
+                */
 
 
-                 selection.html(_t.html('osm_api_status.message.error') + ' ').append('a').attr('href', '#') // let the user manually retry their connection directly
-                 .html(_t.html('osm_api_status.retry')).on('click.retry', function (d3_event) {
-                   d3_event.preventDefault();
-                   throttledRetry();
-                 });
-               }
-             } else if (apiStatus === 'readonly') {
-               selection.html(_t.html('osm_api_status.message.readonly'));
-             } else if (apiStatus === 'offline') {
-               selection.html(_t.html('osm_api_status.message.offline'));
-             }
+               this.setUpperCase = function (a) {
+                 if (typeof a === 'boolean') {
+                   hexcase = a;
+                 }
 
-             selection.attr('class', 'api-status ' + (err ? 'error' : apiStatus));
-           }
+                 return this;
+               };
+               /**
+                * Defines a base64 pad string
+                * @param {String} Pad
+                * @return {Object} this
+                */
 
-           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
+               this.setPad = function (a) {
+                 b64pad = a || b64pad;
+                 return this;
+               };
+               /**
+                * Defines a base64 pad string
+                * @param {Boolean}
+                * @return {Object} [this]
+                */
 
-           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;
+               this.setUTF8 = function (a) {
+                 if (typeof a === 'boolean') {
+                   utf8 = a;
+                 }
 
-         mode.enter = function () {
-           context.install(behavior);
-         };
+                 return this;
+               }; // private methods
 
-         mode.exit = function () {
-           context.uninstall(behavior);
-         };
+               /**
+                * Calculate the MD5 of a raw string
+                */
 
-         mode.selectedIDs = function () {
-           return [wayID];
-         };
 
-         mode.activeID = function () {
-           return behavior && behavior.activeID() || [];
-         };
+               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)
+                */
 
-         return mode;
-       }
 
-       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 rstr_hmac(key, data) {
+                 var bkey, ipad, opad, hash, i;
+                 key = utf8 ? utf8Encode(key) : key;
+                 data = utf8 ? utf8Encode(data) : data;
+                 bkey = rstr2binl(key);
 
-         function actionClose(wayId) {
-           return function (graph) {
-             return graph.replace(graph.entity(wayId).close());
-           };
-         }
+                 if (bkey.length > 16) {
+                   bkey = binl(bkey, key.length * 8);
+                 }
 
-         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));
-         }
+                 ipad = Array(16), opad = Array(16);
 
-         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));
-         }
+                 for (i = 0; i < 16; i += 1) {
+                   ipad[i] = bkey[i] ^ 0x36363636;
+                   opad[i] = bkey[i] ^ 0x5C5C5C5C;
+                 }
 
-         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));
-         }
+                 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.
+                */
 
-         mode.enter = function () {
-           context.install(behavior);
-         };
 
-         mode.exit = function () {
-           context.uninstall(behavior);
-         };
+               function binl(x, len) {
+                 var i,
+                     olda,
+                     oldb,
+                     oldc,
+                     oldd,
+                     a = 1732584193,
+                     b = -271733879,
+                     c = -1732584194,
+                     d = 271733878;
+                 /* append padding */
 
-         return mode;
-       }
+                 x[len >> 5] |= 0x80 << len % 32;
+                 x[(len + 64 >>> 9 << 4) + 14] = len;
 
-       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');
+                 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);
+                 }
 
-         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));
-         }
+                 return Array(a, b, c, d);
+               }
+               /**
+                * These functions implement the four basic operations the algorithm uses.
+                */
 
-         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));
-         }
 
-         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));
-         }
+               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);
+               }
 
-         mode.enter = function () {
-           context.install(behavior);
-         };
+               function md5_ff(a, b, c, d, x, s, t) {
+                 return md5_cmn(b & c | ~b & d, a, b, x, s, t);
+               }
 
-         mode.exit = function () {
-           context.uninstall(behavior);
-         };
+               function md5_gg(a, b, c, d, x, s, t) {
+                 return md5_cmn(b & d | c & ~d, a, b, x, s, t);
+               }
 
-         return mode;
-       }
+               function md5_hh(a, b, c, d, x, s, t) {
+                 return md5_cmn(b ^ c ^ d, a, b, x, s, t);
+               }
 
-       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 md5_ii(a, b, c, d, x, s, t) {
+                 return md5_cmn(c ^ (b | ~d), a, b, x, s, t);
+               }
+             },
 
-         function add(loc) {
-           var node = osmNode({
-             loc: loc,
-             tags: defaultTags
-           });
-           context.perform(actionAddEntity(node), _t('operations.add.annotation.point'));
-           enterSelectMode(node);
-         }
+             /**
+              * @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 addWay(loc, edge) {
-           var node = osmNode({
-             tags: defaultTags
-           });
-           context.perform(actionAddMidpoint({
-             loc: loc,
-             edge: edge
-           }, node), _t('operations.add.annotation.vertex'));
-           enterSelectMode(node);
-         }
+               this.hex = function (s) {
+                 return rstr2hex(rstr(s), hexcase);
+               };
 
-         function enterSelectMode(node) {
-           context.enter(modeSelect(context, [node.id]).newFeature(true));
-         }
+               this.b64 = function (s) {
+                 return rstr2b64(rstr(s), b64pad);
+               };
 
-         function addNode(node) {
-           if (Object.keys(defaultTags).length === 0) {
-             enterSelectMode(node);
-             return;
-           }
+               this.any = function (s, e) {
+                 return rstr2any(rstr(s), e);
+               };
 
-           var tags = Object.assign({}, node.tags); // shallow copy
+               this.raw = function (s) {
+                 return rstr(s);
+               };
 
-           for (var key in defaultTags) {
-             tags[key] = defaultTags[key];
-           }
+               this.hex_hmac = function (k, d) {
+                 return rstr2hex(rstr_hmac(k, d));
+               };
 
-           context.perform(actionChangeTags(node.id, tags), _t('operations.add.annotation.point'));
-           enterSelectMode(node);
-         }
+               this.b64_hmac = function (k, d) {
+                 return rstr2b64(rstr_hmac(k, d), b64pad);
+               };
 
-         function cancel() {
-           context.enter(modeBrowse(context));
-         }
+               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
+                */
 
-         mode.enter = function () {
-           context.install(behavior);
-         };
 
-         mode.exit = function () {
-           context.uninstall(behavior);
-         };
+               this.vm_test = function () {
+                 return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
+               };
+               /**
+                * @description Enable/disable uppercase hexadecimal returned string
+                * @param {boolean}
+                * @return {Object} this
+                * @public
+                */
 
-         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);
+               this.setUpperCase = function (a) {
+                 if (typeof a === 'boolean') {
+                   hexcase = a;
+                 }
 
-         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)
+                 return this;
+               };
+               /**
+                * @description Defines a base64 pad string
+                * @param {string} Pad
+                * @return {Object} this
+                * @public
+                */
 
-           context.map().pan([0, 0]);
-           context.selectedNoteID(note.id).enter(modeSelectNote(context, note.id).newFeature(true));
-         }
 
-         function cancel() {
-           context.enter(modeBrowse(context));
-         }
+               this.setPad = function (a) {
+                 b64pad = a || b64pad;
+                 return this;
+               };
+               /**
+                * @description Defines a base64 pad string
+                * @param {boolean}
+                * @return {Object} this
+                * @public
+                */
 
-         mode.enter = function () {
-           context.install(behavior);
-         };
 
-         mode.exit = function () {
-           context.uninstall(behavior);
-         };
+               this.setUTF8 = function (a) {
+                 if (typeof a === 'boolean') {
+                   utf8 = a;
+                 }
 
-         return mode;
-       }
+                 return this;
+               }; // private methods
 
-       function uiConflicts(context) {
-         var dispatch$1 = dispatch('cancel', 'save');
-         var keybinding = utilKeybinding('conflicts');
+               /**
+                * Calculate the SHA-512 of a raw string
+                */
 
-         var _origChanges;
 
-         var _conflictList;
+               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 _shownConflictIndex;
 
-         function keybindingOn() {
-           select(document).call(keybinding.on('⎋', cancel, true));
-         }
+               function rstr_hmac(key, data) {
+                 var bkey, ipad, opad, i, hash;
+                 key = utf8 ? utf8Encode(key) : key;
+                 data = utf8 ? utf8Encode(data) : data;
+                 bkey = rstr2binb(key);
 
-         function keybindingOff() {
-           select(document).call(keybinding.unbind);
-         }
+                 if (bkey.length > 16) {
+                   bkey = binb(bkey, key.length * 8);
+                 }
 
-         function tryAgain() {
-           keybindingOff();
-           dispatch$1.call('save');
-         }
+                 ipad = Array(16), opad = Array(16);
 
-         function cancel() {
-           keybindingOff();
-           dispatch$1.call('cancel');
-         }
+                 for (i = 0; i < 16; i += 1) {
+                   ipad[i] = bkey[i] ^ 0x36363636;
+                   opad[i] = bkey[i] ^ 0x5C5C5C5C;
+                 }
 
-         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
+                 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
+                */
 
-           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 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 (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);
-             });
-           }
+                 x[len >> 5] |= 0x80 << 24 - len % 32;
+                 x[(len + 64 >> 9 << 4) + 15] = len;
 
-           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);
-         }
+                 for (i = 0; i < x.length; i += 16) {
+                   olda = a;
+                   oldb = b;
+                   oldc = c;
+                   oldd = d;
+                   olde = e;
 
-         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..
+                   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 (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);
-           }
+                     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 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);
-           });
-         }
+                   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 addChoices(selection) {
-           var choices = selection.append('ul').attr('class', 'layer-list').selectAll('li').data(function (d) {
-             return d.choices || [];
-           }); // enter
+                 return Array(a, b, c, d, e);
+               }
+               /**
+                * Perform the appropriate triplet combination function for the current
+                * iteration
+                */
 
-           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
 
-           choicesEnter.merge(choices).each(function (d) {
-             var ul = this.parentNode;
+               function sha1_ft(t, b, c, d) {
+                 if (t < 20) {
+                   return b & c | ~b & d;
+                 }
 
-             if (ul.__data__.chosen === d.id) {
-               choose(null, ul, d);
-             }
-           });
-         }
+                 if (t < 40) {
+                   return b ^ c ^ d;
+                 }
 
-         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 (t < 60) {
+                   return b & c | b & d | c & d;
+                 }
 
-         function zoomToEntity(id, extent) {
-           context.surface().selectAll('.hover').classed('hover', false);
-           var entity = context.graph().hasEntity(id);
+                 return b ^ c ^ d;
+               }
+               /**
+                * Determine the appropriate additive constant for the current iteration
+                */
 
-           if (entity) {
-             if (extent) {
-               context.map().trimmedExtent(extent);
-             } else {
-               context.map().zoomToEase(entity);
-             }
 
-             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)
-         //     ]
-         // }
+               function sha1_kt(t) {
+                 return t < 20 ? 1518500249 : t < 40 ? 1859775393 : t < 60 ? -1894007588 : -899497514;
+               }
+             },
 
+             /**
+              * @class Hashes.SHA256
+              * @param {config}
+              *
+              * A JavaScript implementation of the Secure Hash Algorithm, SHA-256, as defined in FIPS 180-2
+              * Version 2.2 Copyright Angel Marin, Paul Johnston 2000 - 2009.
+              * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
+              * See http://pajhome.org.uk/crypt/md5 for details.
+              * Also http://anmar.eu.org/projects/jssha2/
+              */
+             SHA256: function 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 : '=',
 
-         conflicts.conflictList = function (_) {
-           if (!arguments.length) return _conflictList;
-           _conflictList = _;
-           return conflicts;
-         };
+               /* base-64 pad character. Default '=' for strict RFC compliance   */
+               utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true,
 
-         conflicts.origChanges = function (_) {
-           if (!arguments.length) return _origChanges;
-           _origChanges = _;
-           return conflicts;
-         };
+               /* enable/disable utf8 encoding */
+               sha256_K;
+               /* privileged (public) methods */
 
-         conflicts.shownEntityIds = function () {
-           if (_conflictList && typeof _shownConflictIndex === 'number') {
-             return [_conflictList[_shownConflictIndex].id];
-           }
+               this.hex = function (s) {
+                 return rstr2hex(rstr(s, utf8));
+               };
 
-           return [];
-         };
+               this.b64 = function (s) {
+                 return rstr2b64(rstr(s, utf8), b64pad);
+               };
 
-         return utilRebind(conflicts, dispatch$1, 'on');
-       }
+               this.any = function (s, e) {
+                 return rstr2any(rstr(s, utf8), e);
+               };
 
-       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');
+               this.raw = function (s) {
+                 return rstr(s, utf8);
+               };
 
-         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;
-         };
+               this.hex_hmac = function (k, d) {
+                 return rstr2hex(rstr_hmac(k, d));
+               };
 
-         return modalSelection;
-       }
+               this.b64_hmac = function (k, d) {
+                 return rstr2b64(rstr_hmac(k, d), b64pad);
+               };
 
-       function uiChangesetEditor(context) {
-         var dispatch$1 = dispatch('change');
-         var formFields = uiFormFields(context);
-         var commentCombo = uiCombobox(context, 'comment').caseSensitive(true);
+               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 _fieldsArr;
 
-         var _tags;
+               this.vm_test = function () {
+                 return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
+               };
+               /**
+                * Enable/disable uppercase hexadecimal returned string
+                * @param {boolean}
+                * @return {Object} this
+                * @public
+                */
 
-         var _changesetID;
 
-         function changesetEditor(selection) {
-           render(selection);
-         }
+               this.setUpperCase = function (a) {
 
-         function render(selection) {
-           var initial = false;
+                 return this;
+               };
+               /**
+                * @description Defines a base64 pad string
+                * @param {string} Pad
+                * @return {Object} this
+                * @public
+                */
 
-           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);
-               });
-             });
-           }
+               this.setPad = function (a) {
+                 b64pad = a || b64pad;
+                 return this;
+               };
+               /**
+                * Defines a base64 pad string
+                * @param {boolean}
+                * @return {Object} this
+                * @public
+                */
 
-           _fieldsArr.forEach(function (field) {
-             field.tags(_tags);
-           });
 
-           selection.call(formFields.fieldsArr(_fieldsArr));
+               this.setUTF8 = function (a) {
+                 if (typeof a === 'boolean') {
+                   utf8 = a;
+                 }
 
-           if (initial) {
-             var commentField = selection.select('.form-field-comment textarea');
-             var commentNode = commentField.node();
+                 return this;
+               }; // private methods
 
-             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
+               /**
+                * Calculate the SHA-512 of a raw string
+                */
 
 
-             utilTriggerEvent(commentField, 'blur');
-             var osm = context.connection();
+               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)
+                */
 
-             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 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 hasGoogle = _tags.comment.match(/google/i);
+                 if (bkey.length > 16) {
+                   bkey = binb(bkey, key.length * 8);
+                 }
 
-           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);
-         }
+                 for (; i < 16; i += 1) {
+                   ipad[i] = bkey[i] ^ 0x36363636;
+                   opad[i] = bkey[i] ^ 0x5C5C5C5C;
+                 }
 
-         changesetEditor.tags = function (_) {
-           if (!arguments.length) return _tags;
-           _tags = _; // Don't reset _fieldsArr here.
+                 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
+                */
 
-           return changesetEditor;
-         };
 
-         changesetEditor.changesetID = function (_) {
-           if (!arguments.length) return _changesetID;
-           if (_changesetID === _) return changesetEditor;
-           _changesetID = _;
-           _fieldsArr = null;
-           return changesetEditor;
-         };
+               function sha256_S(X, n) {
+                 return X >>> n | X << 32 - n;
+               }
 
-         return utilRebind(changesetEditor, dispatch$1, 'on');
-       }
+               function sha256_R(X, n) {
+                 return X >>> n;
+               }
 
-       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);
+               function sha256_Ch(x, y, z) {
+                 return x & y ^ ~x & z;
+               }
 
-         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 = '';
+               function sha256_Maj(x, y, z) {
+                 return x & y ^ x & z ^ y & z;
+               }
 
-             if (name !== '') {
-               string += ':';
-             }
+               function sha256_Sigma0256(x) {
+                 return sha256_S(x, 2) ^ sha256_S(x, 13) ^ sha256_S(x, 22);
+               }
 
-             return string += ' ' + name;
-           });
-           items = itemsEnter.merge(items); // Download changeset link
+               function sha256_Sigma1256(x) {
+                 return sha256_S(x, 6) ^ sha256_S(x, 11) ^ sha256_S(x, 25);
+               }
 
-           var changeset = new osmChangeset().update({
-             id: undefined
-           });
-           var changes = history.changes(actionDiscardTags(history.difference(), _discardTags));
-           delete changeset.id; // Export without chnageset_id
+               function sha256_Gamma0256(x) {
+                 return sha256_S(x, 7) ^ sha256_S(x, 18) ^ sha256_R(x, 3);
+               }
 
-           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');
+               function sha256_Gamma1256(x) {
+                 return sha256_S(x, 17) ^ sha256_S(x, 19) ^ sha256_R(x, 10);
+               }
 
-           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);
-             });
-           }
+               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];
 
-           linkEnter.call(svgIcon('#iD-icon-load', 'inline')).append('span').html(_t.html('commit.download_changes'));
+               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 */
 
-           function mouseover(d) {
-             if (d.entity) {
-               context.surface().selectAll(utilEntityOrMemberSelector([d.entity.id], context.graph())).classed('hover', true);
-             }
-           }
+                 m[l >> 5] |= 0x80 << 24 - l % 32;
+                 m[(l + 64 >> 9 << 4) + 15] = l;
 
-           function mouseout() {
-             context.surface().selectAll('.hover').classed('hover', false);
-           }
+                 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];
 
-           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);
-             }
-           }
-         }
+                   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]);
+                     }
 
-         return section;
-       }
+                     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);
+                   }
 
-       function uiCommitWarnings(context) {
-         function commitWarnings(selection) {
-           var issuesBySeverity = context.validator().getIssuesBySeverity({
-             what: 'edited',
-             where: 'all',
-             includeDisabledRules: true
-           });
+                   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]);
+                 }
 
-           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);
+                 return HASH;
                }
-             }).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);
-             });
-           }
-         }
+             },
 
-         return commitWarnings;
-       }
+             /**
+              * @class Hashes.SHA512
+              * @param {config}
+              *
+              * A JavaScript implementation of the Secure Hash Algorithm, SHA-512, as defined in FIPS 180-2
+              * Version 2.2 Copyright Anonymous Contributor, Paul Johnston 2000 - 2009.
+              * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
+              * See http://pajhome.org.uk/crypt/md5 for details.
+              */
+             SHA512: function SHA512(options) {
+               /**
+                * Private properties configuration variables. You may need to tweak these to be compatible with
+                * the server-side, but the defaults work in most cases.
+                * @see this.setUpperCase() method
+                * @see this.setPad() method
+                */
+               options && typeof options.uppercase === 'boolean' ? options.uppercase : false;
 
-       var 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 /* hexadecimal output case format. false - lowercase; true - uppercase  */
+               b64pad = options && typeof options.pad === 'string' ? options.pad : '=',
 
-       var hashtagRegex = /(#[^\u2000-\u206F\u2E00-\u2E7F\s\\'!"#$%()*,.\/:;<=>?@\[\]^`{|}~]+)/g;
-       function uiCommit(context) {
-         var dispatch$1 = dispatch('cancel');
+               /* base-64 pad character. Default '=' for strict RFC compliance   */
+               utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true,
 
-         var _userDetails;
+               /* enable/disable utf8 encoding */
+               sha512_k;
+               /* privileged (public) methods */
 
-         var _selection;
+               this.hex = function (s) {
+                 return rstr2hex(rstr(s));
+               };
 
-         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);
+               this.b64 = function (s) {
+                 return rstr2b64(rstr(s), b64pad);
+               };
 
-         function commit(selection) {
-           _selection = selection; // Initialize changeset if one does not exist yet.
+               this.any = function (s, e) {
+                 return rstr2any(rstr(s), e);
+               };
 
-           if (!context.changeset) initChangeset();
-           loadDerivedChangesetTags();
-           selection.call(render);
-         }
+               this.raw = function (s) {
+                 return rstr(s);
+               };
 
-         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
+               this.hex_hmac = function (k, d) {
+                 return rstr2hex(rstr_hmac(k, d));
+               };
 
-           if (commentDate > currDate || currDate - commentDate > cutoff) {
-             corePreferences('comment', null);
-             corePreferences('hashtags', null);
-             corePreferences('source', null);
-           } // load in explicitly-set values, if any
+               this.b64_hmac = function (k, d) {
+                 return rstr2b64(rstr_hmac(k, d), b64pad);
+               };
 
+               this.any_hmac = function (k, d, e) {
+                 return rstr2any(rstr_hmac(k, d), e);
+               };
+               /**
+                * Perform a simple self-test to see if the VM is working
+                * @return {String} Hexadecimal hash sample
+                * @public
+                */
 
-           if (context.defaultChangesetComment()) {
-             corePreferences('comment', context.defaultChangesetComment());
-             corePreferences('commentDate', Date.now());
-           }
 
-           if (context.defaultChangesetSource()) {
-             corePreferences('source', context.defaultChangesetSource());
-             corePreferences('commentDate', Date.now());
-           }
+               this.vm_test = function () {
+                 return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
+               };
+               /**
+                * @description Enable/disable uppercase hexadecimal returned string
+                * @param {boolean}
+                * @return {Object} this
+                * @public
+                */
 
-           if (context.defaultChangesetHashtags()) {
-             corePreferences('hashtags', context.defaultChangesetHashtags());
-             corePreferences('commentDate', Date.now());
-           }
 
-           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
+               this.setUpperCase = function (a) {
 
-           findHashtags(tags, true);
-           var hashtags = corePreferences('hashtags');
+                 return this;
+               };
+               /**
+                * @description Defines a base64 pad string
+                * @param {string} Pad
+                * @return {Object} this
+                * @public
+                */
 
-           if (hashtags) {
-             tags.hashtags = hashtags;
-           }
 
-           var source = corePreferences('source');
+               this.setPad = function (a) {
+                 b64pad = a || b64pad;
+                 return this;
+               };
+               /**
+                * @description Defines a base64 pad string
+                * @param {boolean}
+                * @return {Object} this
+                * @public
+                */
 
-           if (source) {
-             tags.source = source;
-           }
 
-           var photoOverlaysUsed = context.history().photoOverlaysUsed();
+               this.setUTF8 = function (a) {
+                 if (typeof a === 'boolean') {
+                   utf8 = a;
+                 }
 
-           if (photoOverlaysUsed.length) {
-             var sources = (tags.source || '').split(';'); // include this tag for any photo layer
+                 return this;
+               };
+               /* private methods */
 
-             if (sources.indexOf('streetlevel imagery') === -1) {
-               sources.push('streetlevel imagery');
-             } // add the photo overlays used during editing as sources
+               /**
+                * Calculate the SHA-512 of a raw string
+                */
 
 
-             photoOverlaysUsed.forEach(function (photoOverlay) {
-               if (sources.indexOf(photoOverlay) === -1) {
-                 sources.push(photoOverlay);
+               function rstr(s) {
+                 s = utf8 ? utf8Encode(s) : s;
+                 return binb2rstr(binb(rstr2binb(s), s.length * 8));
                }
-             });
-             tags.source = context.cleanTagValue(sources.join(';'));
-           }
+               /*
+                * Calculate the HMAC-SHA-512 of a key and some data (raw strings)
+                */
 
-           context.changeset = new osmChangeset({
-             tags: tags
-           });
-         } // Calculates read-only metadata tags based on the user's editing session and applies
-         // them to the changeset.
 
+               function 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 loadDerivedChangesetTags() {
-           var osm = context.connection();
-           if (!osm) return;
-           var tags = Object.assign({}, context.changeset.tags); // shallow copy
-           // assign tags for imagery used
+                 if (bkey.length > 32) {
+                   bkey = binb(bkey, key.length * 8);
+                 }
 
-           var imageryUsed = context.cleanTagValue(context.history().imageryUsed().join(';'));
-           tags.imagery_used = imageryUsed || 'None'; // assign tags for closed issues and notes
+                 for (; i < 32; i += 1) {
+                   ipad[i] = bkey[i] ^ 0x36363636;
+                   opad[i] = bkey[i] ^ 0x5C5C5C5C;
+                 }
 
-           var osmClosed = osm.getClosedIDs();
-           var itemType;
+                 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 (osmClosed.length) {
-             tags['closed:note'] = context.cleanTagValue(osmClosed.join(';'));
-           }
 
-           if (services.keepRight) {
-             var krClosed = services.keepRight.getClosedIDs();
+               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 (krClosed.length) {
-               tags['closed:keepright'] = context.cleanTagValue(krClosed.join(';'));
-             }
-           }
+                 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)];
+                 }
 
-           if (services.improveOSM) {
-             var iOsmClosed = services.improveOSM.getClosedCounts();
+                 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.
 
-             for (itemType in iOsmClosed) {
-               tags['closed:improveosm:' + itemType] = context.cleanTagValue(iOsmClosed[itemType].toString());
-             }
-           }
 
-           if (services.osmose) {
-             var osmoseClosed = services.osmose.getClosedCounts();
+                 x[len >> 5] |= 0x80 << 24 - (len & 0x1f);
+                 x[(len + 128 >> 10 << 5) + 31] = len;
+                 l = x.length;
 
-             for (itemType in osmoseClosed) {
-               tags['closed:osmose:' + itemType] = context.cleanTagValue(osmoseClosed[itemType].toString());
-             }
-           } // remove existing issue counts
+                 for (i = 0; i < l; i += 32) {
+                   //32 dwords is the block size
+                   int64copy(a, H[0]);
+                   int64copy(b, H[1]);
+                   int64copy(c, H[2]);
+                   int64copy(d, H[3]);
+                   int64copy(e, H[4]);
+                   int64copy(f, H[5]);
+                   int64copy(g, H[6]);
+                   int64copy(h, H[7]);
 
+                   for (j = 0; j < 16; j += 1) {
+                     W[j].h = x[i + 2 * j];
+                     W[j].l = x[i + 2 * j + 1];
+                   }
 
-           for (var key in tags) {
-             if (key.match(/(^warnings:)|(^resolved:)/)) {
-               delete tags[key];
-             }
-           }
+                   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
 
-           function addIssueCounts(issues, prefix) {
-             var issuesByType = utilArrayGroupBy(issues, 'type');
+                     int64rrot(r1, W[j - 15], 1);
+                     int64rrot(r2, W[j - 15], 8);
+                     int64shr(r3, W[j - 15], 7);
+                     s0.l = r1.l ^ r2.l ^ r3.l;
+                     s0.h = r1.h ^ r2.h ^ r3.h;
+                     int64add4(W[j], s1, W[j - 7], s0, W[j - 16]);
+                   }
 
-             for (var issueType in issuesByType) {
-               var issuesOfType = issuesByType[issueType];
+                   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
 
-               if (issuesOfType[0].subtype) {
-                 var issuesBySubtype = utilArrayGroupBy(issuesOfType, 'subtype');
+                     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
 
-                 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
+                     int64rrot(r1, a, 28);
+                     int64revrrot(r2, a, 2);
+                     int64revrrot(r3, a, 7);
+                     s0.l = r1.l ^ r2.l ^ r3.l;
+                     s0.h = r1.h ^ r2.h ^ r3.h; //Maj
 
+                     Maj.l = a.l & b.l ^ a.l & c.l ^ b.l & c.l;
+                     Maj.h = a.h & b.h ^ a.h & c.h ^ b.h & c.h;
+                     int64add5(T1, h, s1, Ch, sha512_k[j], W[j]);
+                     int64add(T2, s0, Maj);
+                     int64copy(h, g);
+                     int64copy(g, f);
+                     int64copy(f, e);
+                     int64add(e, d, T1);
+                     int64copy(d, c);
+                     int64copy(c, b);
+                     int64copy(b, a);
+                     int64add(a, T1, T2);
+                   }
 
-           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
+                   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
 
-           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
+                 for (i = 0; i < 8; i += 1) {
+                   hash[2 * i] = H[i].h;
+                   hash[2 * i + 1] = H[i].l;
+                 }
 
-           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
+                 return hash;
+               } //A constructor for 64-bit numbers
 
-           body.call(commitWarnings); // Upload Explanation
 
-           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 int64(h, l) {
+                 this.h = h;
+                 this.l = l; //this.toString = int64toString;
+               } //Copies src into dst, assuming both are 64-bit numbers
 
-           if (prose.enter().size()) {
-             // first time, make sure to update user details in prose
-             _userDetails = null;
-           }
 
-           prose = prose.enter().append('p').attr('class', 'commit-info').html(_t.html('commit.upload_explanation')).merge(prose); // always check if this has changed, but only update prose.html()
-           // if needed, because it can trigger a style recalculation
+               function 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
 
-           osm.userDetails(function (err, user) {
-             if (err) return;
-             if (_userDetails === user) return; // no change
 
-             _userDetails = user;
-             var userLink = select(document.createElement('div'));
+               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
 
-             if (user.image_url) {
-               userLink.append('img').attr('src', user.image_url).attr('class', 'icon pre-text user-icon');
-             }
 
-             userLink.append('a').attr('class', 'user-info').html(user.display_name).attr('href', osm.userURL(user.display_name)).attr('target', '_blank');
-             prose.html(_t.html('commit.upload_explanation_with_user', {
-               user: userLink.html()
-             }));
-           }); // Request Review
+               function int64revrrot(dst, x, shift) {
+                 dst.l = x.h >>> shift | x.l << 32 - shift;
+                 dst.h = x.l >>> shift | x.h << 32 - shift;
+               } //Bitwise-shifts right a 64-bit number by shift
+               //Won't handle shift>=32, but it's never needed in SHA512
 
-           var 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);
-           labelEnter.append('input').attr('type', 'checkbox').attr('id', requestReviewDomId);
-           labelEnter.append('span').html(_t.html('commit.request_review')); // Update
+               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
 
-           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
+               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 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
+               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
 
-               for (var key in context.changeset.tags) {
-                 // remove any empty keys before upload
-                 if (!key) delete context.changeset.tags[key];
+
+               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;
                }
+             },
 
-               context.uploader().save(context.changeset);
-             }
-           }); // remove any existing tooltip
+             /**
+              * @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;
 
-           uiTooltip().destroyAny(buttonSection.selectAll('.save-button'));
+               var /* hexadecimal output case format. false - lowercase; true - uppercase  */
+               b64pad = options && typeof options.pad === 'string' ? options.pa : '=',
 
-           if (uploadBlockerTooltipText) {
-             buttonSection.selectAll('.save-button').call(uiTooltip().title(uploadBlockerTooltipText).placement('top'));
-           } // Raw Tag Editor
+               /* base-64 pad character. Default '=' for strict RFC compliance   */
+               utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true,
 
+               /* enable/disable utf8 encoding */
+               rmd160_r1 = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 7, 4, 13, 1, 10, 6, 15, 3, 12, 0, 9, 5, 2, 14, 11, 8, 3, 10, 14, 4, 9, 15, 8, 1, 2, 7, 0, 6, 13, 11, 5, 12, 1, 9, 11, 10, 0, 8, 12, 4, 13, 3, 7, 15, 14, 5, 6, 2, 4, 0, 5, 9, 7, 12, 2, 10, 14, 1, 3, 8, 11, 6, 15, 13],
+                   rmd160_r2 = [5, 14, 7, 0, 9, 2, 11, 4, 13, 6, 15, 8, 1, 10, 3, 12, 6, 11, 3, 7, 0, 13, 5, 10, 14, 15, 8, 12, 4, 9, 1, 2, 15, 5, 1, 3, 7, 14, 6, 9, 11, 8, 12, 2, 10, 0, 4, 13, 8, 6, 4, 1, 3, 11, 15, 0, 5, 12, 2, 13, 9, 7, 10, 14, 12, 15, 10, 4, 1, 5, 8, 7, 6, 2, 13, 14, 0, 3, 9, 11],
+                   rmd160_s1 = [11, 14, 15, 12, 5, 8, 7, 9, 11, 13, 14, 15, 6, 7, 9, 8, 7, 6, 8, 13, 11, 9, 7, 15, 7, 12, 15, 9, 11, 7, 13, 12, 11, 13, 6, 7, 14, 9, 13, 15, 14, 8, 13, 6, 5, 12, 7, 5, 11, 12, 14, 15, 14, 15, 9, 8, 9, 14, 5, 6, 8, 6, 5, 12, 9, 15, 5, 11, 6, 8, 13, 12, 5, 12, 13, 14, 11, 8, 5, 6],
+                   rmd160_s2 = [8, 9, 9, 11, 13, 15, 15, 5, 7, 7, 8, 11, 14, 14, 12, 6, 9, 13, 15, 7, 12, 8, 9, 11, 7, 7, 12, 7, 6, 15, 13, 11, 9, 7, 15, 11, 8, 6, 6, 14, 12, 13, 5, 14, 13, 13, 7, 5, 15, 5, 8, 11, 14, 14, 6, 14, 6, 9, 12, 9, 12, 5, 15, 8, 8, 5, 12, 9, 12, 5, 14, 6, 8, 13, 6, 5, 15, 13, 11, 11];
+               /* privileged (public) methods */
 
-           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
+               this.hex = function (s) {
+                 return rstr2hex(rstr(s));
+               };
 
-           changesSection.call(commitChanges.render);
+               this.b64 = function (s) {
+                 return rstr2b64(rstr(s), b64pad);
+               };
 
-           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.any = function (s, e) {
+                 return rstr2any(rstr(s), e);
+               };
 
-         function getUploadBlockerMessage() {
-           var errors = context.validator().getIssuesBySeverity({
-             what: 'edited',
-             where: 'all'
-           }).error;
+               this.raw = function (s) {
+                 return rstr(s);
+               };
 
-           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;
+               this.hex_hmac = function (k, d) {
+                 return rstr2hex(rstr_hmac(k, d));
+               };
 
-             if (!hasChangesetComment) {
-               return _t('commit.comment_needed_message');
-             }
-           }
+               this.b64_hmac = function (k, d) {
+                 return rstr2b64(rstr_hmac(k, d), b64pad);
+               };
 
-           return null;
-         }
+               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 changeTags(_, changed, onInput) {
-           if (changed.hasOwnProperty('comment')) {
-             if (changed.comment === undefined) {
-               changed.comment = '';
-             }
 
-             if (!onInput) {
-               corePreferences('comment', changed.comment);
-               corePreferences('commentDate', Date.now());
-             }
-           }
+               this.vm_test = function () {
+                 return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
+               };
+               /**
+                * @description Enable/disable uppercase hexadecimal returned string
+                * @param {boolean}
+                * @return {Object} this
+                * @public
+                */
 
-           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`
 
+               this.setUpperCase = function (a) {
 
-           updateChangeset(changed, onInput);
+                 return this;
+               };
+               /**
+                * @description Defines a base64 pad string
+                * @param {string} Pad
+                * @return {Object} this
+                * @public
+                */
 
-           if (_selection) {
-             _selection.call(render);
-           }
-         }
 
-         function findHashtags(tags, commentOnly) {
-           var detectedHashtags = commentHashtags();
+               this.setPad = function (a) {
+                 if (typeof a !== 'undefined') {
+                   b64pad = a;
+                 }
 
-           if (detectedHashtags.length) {
-             // always remove stored hashtags if there are hashtags in the comment - #4304
-             corePreferences('hashtags', null);
-           }
+                 return this;
+               };
+               /**
+                * @description Defines a base64 pad string
+                * @param {boolean}
+                * @return {Object} this
+                * @public
+                */
 
-           if (!detectedHashtags.length || !commentOnly) {
-             detectedHashtags = detectedHashtags.concat(hashtagHashtags());
-           }
 
-           var allLowerCase = new Set();
-           return detectedHashtags.filter(function (hashtag) {
-             // Compare tags as lowercase strings, but keep original case tags
-             var lowerCase = hashtag.toLowerCase();
+               this.setUTF8 = function (a) {
+                 if (typeof a === 'boolean') {
+                   utf8 = a;
+                 }
 
-             if (!allLowerCase.has(lowerCase)) {
-               allLowerCase.add(lowerCase);
-               return true;
-             }
+                 return this;
+               };
+               /* private methods */
 
-             return false;
-           }); // Extract hashtags from `comment`
+               /**
+                * Calculate the rmd160 of a raw string
+                */
 
-           function commentHashtags() {
-             var matches = (tags.comment || '').replace(/http\S*/g, '') // drop anything that looks like a URL - #4289
-             .match(hashtagRegex);
-             return matches || [];
-           } // Extract and clean hashtags from `hashtags`
+
+               function 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 hashtagHashtags() {
-             var matches = (tags.hashtags || '').split(/[,;\s]+/).map(function (s) {
-               if (s[0] !== '#') {
-                 s = '#' + s;
-               } // prepend '#'
+               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 (bkey.length > 16) {
+                   bkey = binl(bkey, key.length * 8);
+                 }
 
-               var matched = s.match(hashtagRegex);
-               return matched && matched[0];
-             }).filter(Boolean); // exclude falsy
+                 for (i = 0; i < 16; i += 1) {
+                   ipad[i] = bkey[i] ^ 0x36363636;
+                   opad[i] = bkey[i] ^ 0x5C5C5C5C;
+                 }
 
-             return matches || [];
-           }
-         }
+                 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
+                */
 
-         function isReviewRequested(tags) {
-           var rr = tags.review_requested;
-           if (rr === undefined) return false;
-           rr = rr.trim().toLowerCase();
-           return !(rr === '' || rr === 'no');
-         }
 
-         function updateChangeset(changed, onInput) {
-           var tags = Object.assign({}, context.changeset.tags); // shallow copy
+               function binl2rstr(input) {
+                 var i,
+                     output = '',
+                     l = input.length * 32;
 
-           Object.keys(changed).forEach(function (k) {
-             var v = changed[k];
-             k = context.cleanTagKey(k);
-             if (readOnlyTags.indexOf(k) !== -1) return;
+                 for (i = 0; i < l; i += 8) {
+                   output += String.fromCharCode(input[i >> 5] >>> i % 32 & 0xFF);
+                 }
 
-             if (v === undefined) {
-               delete tags[k];
-             } else if (onInput) {
-               tags[k] = v;
-             } else {
-               tags[k] = context.cleanTagValue(v);
-             }
-           });
+                 return output;
+               }
+               /**
+                * Calculate the RIPE-MD160 of an array of little-endian words, and a bit length.
+                */
 
-           if (!onInput) {
-             // when changing the comment, override hashtags with any found in comment.
-             var commentOnly = changed.hasOwnProperty('comment') && changed.comment !== '';
-             var arr = findHashtags(tags, commentOnly);
 
-             if (arr.length) {
-               tags.hashtags = context.cleanTagValue(arr.join(';'));
-               corePreferences('hashtags', tags.hashtags);
-             } else {
-               delete tags.hashtags;
-               corePreferences('hashtags', null);
-             }
-           } // always update userdetails, just in case user reauthenticates as someone else
+               function binl(x, len) {
+                 var T,
+                     j,
+                     i,
+                     l,
+                     h0 = 0x67452301,
+                     h1 = 0xefcdab89,
+                     h2 = 0x98badcfe,
+                     h3 = 0x10325476,
+                     h4 = 0xc3d2e1f0,
+                     A1,
+                     B1,
+                     C1,
+                     D1,
+                     E1,
+                     A2,
+                     B2,
+                     C2,
+                     D2,
+                     E2;
+                 /* append padding */
 
+                 x[len >> 5] |= 0x80 << len % 32;
+                 x[(len + 64 >>> 9 << 4) + 14] = len;
+                 l = x.length;
 
-           if (_userDetails && _userDetails.changesets_count !== undefined) {
-             var changesetsCount = parseInt(_userDetails.changesets_count, 10) + 1; // #4283
+                 for (i = 0; i < l; i += 16) {
+                   A1 = A2 = h0;
+                   B1 = B2 = h1;
+                   C1 = C2 = h2;
+                   D1 = D2 = h3;
+                   E1 = E2 = h4;
 
-             tags.changesets_count = String(changesetsCount); // first 100 edits - new user
+                   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;
+                   }
 
-             if (changesetsCount <= 100) {
-               var s;
-               s = corePreferences('walkthrough_completed');
+                   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;
+                 }
 
-               if (s) {
-                 tags['ideditor:walkthrough_completed'] = s;
-               }
+                 return [h0, h1, h2, h3, h4];
+               } // specific algorithm methods
 
-               s = corePreferences('walkthrough_progress');
 
-               if (s) {
-                 tags['ideditor:walkthrough_progress'] = s;
+               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';
                }
 
-               s = corePreferences('walkthrough_started');
+               function rmd160_K1(j) {
+                 return 0 <= j && j <= 15 ? 0x00000000 : 16 <= j && j <= 31 ? 0x5a827999 : 32 <= j && j <= 47 ? 0x6ed9eba1 : 48 <= j && j <= 63 ? 0x8f1bbcdc : 64 <= j && j <= 79 ? 0xa953fd4e : 'rmd160_K1: j out of range';
+               }
 
-               if (s) {
-                 tags['ideditor:walkthrough_started'] = s;
+               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';
                }
              }
-           } 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');
-       }
-
-       var globalIsFinite = global_1.isFinite;
-
-       // `Number.isFinite` method
-       // https://tc39.github.io/ecma262/#sec-number.isfinite
-       var numberIsFinite = Number.isFinite || function isFinite(it) {
-         return typeof it == 'number' && globalIsFinite(it);
-       };
-
-       // `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
-       };
-
-       var geometry_1 = geometry;
-       var ring = ringArea;
+           }; // exposes Hashes
 
-       function geometry(_) {
-         var area = 0,
-             i;
+           (function (window, undefined$1) {
+             var freeExports = false;
 
-         switch (_.type) {
-           case 'Polygon':
-             return polygonArea(_.coordinates);
+             {
+               freeExports = exports;
 
-           case 'MultiPolygon':
-             for (i = 0; i < _.coordinates.length; i++) {
-               area += polygonArea(_.coordinates[i]);
+               if (exports && _typeof(commonjsGlobal) === 'object' && commonjsGlobal && commonjsGlobal === commonjsGlobal.global) {
+                 window = commonjsGlobal;
+               }
              }
 
-             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]);
+             if (typeof undefined$1 === 'function' && _typeof(undefined$1.amd) === 'object' && undefined$1.amd) {
+               // define as an anonymous module, so, through path mapping, it can be aliased
+               undefined$1(function () {
+                 return Hashes;
+               });
+             } else if (freeExports) {
+               // in Node.js or RingoJS v0.8.0+
+               if (module && module.exports === freeExports) {
+                 module.exports = Hashes;
+               } // in Narwhal or RingoJS v0.7.0-
+               else {
+                   freeExports.Hashes = Hashes;
+                 }
+             } else {
+               // in a browser or Rhino
+               window.Hashes = Hashes;
              }
+           })(this);
+         })(); // IIFE
 
-             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]));
-           }
-         }
+       var sha1 = new hashes.SHA1(); // # xtend
 
-         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.
-        */
+       var hasOwnProperty$1 = Object.prototype.hasOwnProperty;
 
+       function xtend() {
+         var target = {};
 
-       function ringArea(coords) {
-         var p1,
-             p2,
-             p3,
-             lowerIndex,
-             middleIndex,
-             upperIndex,
-             i,
-             area = 0,
-             coordsLength = coords.length;
+         for (var i = 0; i < arguments.length; i++) {
+           var source = arguments[i];
 
-         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;
+           for (var key in source) {
+             if (hasOwnProperty$1.call(source, key)) {
+               target[key] = source[key];
              }
-
-             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;
+         return target;
        }
 
-       function rad(_) {
-         return _ * Math.PI / 180;
-       }
+       var ohauth = {};
 
-       var geojsonArea = {
-         geometry: geometry_1,
-         ring: ring
+       ohauth.qsString = function (obj) {
+         return Object.keys(obj).sort().map(function (key) {
+           return ohauth.percentEncode(key) + '=' + ohauth.percentEncode(obj[key]);
+         }).join('&');
        };
 
-       function toRadians(angleInDegrees) {
-         return angleInDegrees * Math.PI / 180;
-       }
-
-       function toDegrees(angleInRadians) {
-         return angleInRadians * 180 / Math.PI;
-       }
-
-       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 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");
-         }
+       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;
+         }, {});
+       };
 
-         var _center = _slicedToArray(center, 2),
-             lng = _center[0],
-             lat = _center[1];
+       ohauth.rawxhr = function (method, url, data, headers, callback) {
+         var xhr = new XMLHttpRequest(),
+             twoHundred = /^20\d$/;
 
-         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)));
-         }
+         xhr.onreadystatechange = function () {
+           if (4 === xhr.readyState && 0 !== xhr.status) {
+             if (twoHundred.test(xhr.status)) callback(null, xhr);else return callback(xhr, null);
+           }
+         };
 
-         if (lng > 180 || lng < -180) {
-           throw new Error("ERROR! Longitude has to be between -180 and 180 but was ".concat(lng));
-         }
+         xhr.onerror = function (e) {
+           return callback(e, null);
+         };
 
-         if (lat > 90 || lat < -90) {
-           throw new Error("ERROR! Latitude has to be between -90 and 90 but was ".concat(lat));
-         }
-       }
+         xhr.open(method, url, true);
 
-       function validateRadius(radius) {
-         if (typeof radius !== "number") {
-           throw new Error("ERROR! Radius has to be a positive number but was: ".concat(_typeof(radius)));
+         for (var h in headers) {
+           xhr.setRequestHeader(h, headers[h]);
          }
 
-         if (radius <= 0) {
-           throw new Error("ERROR! Radius has to be a positive number but was: ".concat(radius));
-         }
-       }
+         xhr.send(data);
+         return xhr;
+       };
 
-       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)));
-         }
+       ohauth.xhr = function (method, url, auth, data, options, callback) {
+         var headers = options && options.header || {
+           'Content-Type': 'application/x-www-form-urlencoded'
+         };
+         headers.Authorization = 'OAuth ' + ohauth.authHeader(auth);
+         return ohauth.rawxhr(method, url, data, headers, callback);
+       };
 
-         if (numberOfSegments < 3) {
-           throw new Error("ERROR! Number of segments has to be at least 3 but was: ".concat(numberOfSegments));
+       ohauth.nonce = function () {
+         for (var o = ''; o.length < 6;) {
+           o += '0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZabcdefghiklmnopqrstuvwxyz'[Math.floor(Math.random() * 61)];
          }
-       }
-
-       function validateInput(_ref) {
-         var center = _ref.center,
-             radius = _ref.radius,
-             numberOfSegments = _ref.numberOfSegments;
-         validateCenter(center);
-         validateRadius(radius);
-         validateNumberOfSegments(numberOfSegments);
-       }
 
-       var circleToPolygon = function circleToPolygon(center, radius, numberOfSegments) {
-         var n = numberOfSegments ? numberOfSegments : 32; // validateInput() throws error on invalid input and do nothing on valid input
+         return o;
+       };
 
-         validateInput({
-           center: center,
-           radius: radius,
-           numberOfSegments: numberOfSegments
-         });
-         var coordinates = [];
+       ohauth.authHeader = function (obj) {
+         return Object.keys(obj).sort().map(function (key) {
+           return encodeURIComponent(key) + '="' + encodeURIComponent(obj[key]) + '"';
+         }).join(', ');
+       };
 
-         for (var i = 0; i < n; ++i) {
-           coordinates.push(offset(center, radius, 2 * Math.PI * -i / n));
-         }
+       ohauth.timestamp = function () {
+         return ~~(+new Date() / 1000);
+       };
 
-         coordinates.push(coordinates[0]);
-         return {
-           type: "Polygon",
-           coordinates: [coordinates]
-         };
+       ohauth.percentEncode = function (s) {
+         return encodeURIComponent(s).replace(/\!/g, '%21').replace(/\'/g, '%27').replace(/\*/g, '%2A').replace(/\(/g, '%28').replace(/\)/g, '%29');
        };
 
-       // `Number.EPSILON` constant
-       // https://tc39.github.io/ecma262/#sec-number.epsilon
-       _export({ target: 'Number', stat: true }, {
-         EPSILON: Math.pow(2, -52)
-       });
+       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);
+       };
        /**
-        * splaytree v3.0.1
-        * Fast Splay tree for Node and browser
+        * 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.
         *
-        * @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
+        * 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.
         */
 
 
-       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.
-        */
-
+       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 splay(i, t, comparator) {
-         var N = new Node$1(null, null);
-         var l = N;
-         var r = N;
+           if (typeof extra_params === 'string' && extra_params.length > 0) {
+             extra_params = ohauth.stringQs(extra_params);
+           }
 
-         while (true) {
-           var cmp = comparator(i, t.key); //if (i < t.key) {
+           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 = xtend({}, 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);
+         };
+       };
 
-           if (cmp < 0) {
-             if (t.left === null) break; //if (i < t.left.key) {
+       var ohauth_1 = ohauth;
 
-             if (comparator(i, t.left.key) < 0) {
-               var y = t.left;
-               /* rotate right */
+       var resolveUrl = 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;
 
-               t.left = y.right;
-               y.right = t;
-               t = y;
-               if (t.left === null) break;
+             if (numUrls === 0) {
+               throw new Error("resolveUrl requires at least one argument; got none.");
              }
 
-             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 */
+             var base = document.createElement("base");
+             base.href = arguments[0];
 
-               t.right = _y.left;
-               _y.left = t;
-               t = _y;
-               if (t.right === null) break;
+             if (numUrls === 1) {
+               return base.href;
              }
 
-             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$1(i, data);
-
-         if (t === null) {
-           node.left = node.right = null;
-           return node;
-         }
+             var head = document.getElementsByTagName("head")[0];
+             head.insertBefore(base, head.firstChild);
+             var a = document.createElement("a");
+             var resolved;
 
-         t = splay(i, t, comparator);
-         var cmp = comparator(i, t.key);
+             for (var index = 1; index < numUrls; index++) {
+               a.href = arguments[index];
+               resolved = a.href;
+               base.href = resolved;
+             }
 
-         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;
-         }
+             head.removeChild(base);
+             return resolved;
+           }
 
-         return node;
-       }
+           return resolveUrl;
+         });
+       });
 
-       function _split(key, v, comparator) {
-         var left = null;
-         var right = null;
+       var assign = make_assign();
+       var create$1 = make_create();
+       var trim$1 = make_trim();
+       var Global$5 = typeof window !== 'undefined' ? window : commonjsGlobal;
+       var util = {
+         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
+       };
 
-         if (v) {
-           v = splay(key, v, comparator);
-           var cmp = comparator(v.key, key);
+       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;
+               });
+             }
 
-           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 obj;
+           };
          }
-
-         return {
-           left: left,
-           right: right
-         };
        }
 
-       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
-        */
+       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 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);
+           return function create(obj, assignProps1, assignProps2, etc) {
+             var assignArgsList = slice$1(arguments, 1);
+             F.prototype = obj;
+             return assign.apply(this, [new F()].concat(assignArgsList));
+           };
          }
        }
 
-       var Tree = /*#__PURE__*/function () {
-         function Tree() {
-           var comparator = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : DEFAULT_COMPARE$1;
-
-           _classCallCheck(this, Tree);
-
-           this._root = null;
-           this._size = 0;
-           this._comparator = comparator;
+       function make_trim() {
+         if (String.prototype.trim) {
+           return function trim(str) {
+             return String.prototype.trim.call(str);
+           };
+         } else {
+           return function trim(str) {
+             return str.replace(/^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g, '');
+           };
          }
-         /**
-          * 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
-            */
+       function bind$1(obj, fn) {
+         return function () {
+           return fn.apply(obj, Array.prototype.slice.call(arguments, 0));
+         };
+       }
 
-         }, {
-           key: "add",
-           value: function add(key, data) {
-             var node = new Node$1(key, data);
+       function slice$1(arr, index) {
+         return Array.prototype.slice.call(arr, index || 0);
+       }
 
-             if (this._root === null) {
-               node.left = node.right = null;
-               this._size++;
-               this._root = node;
-             }
+       function each$7(obj, fn) {
+         pluck$1(obj, function (val, key) {
+           fn(val, key);
+           return false;
+         });
+       }
 
-             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 map(obj, fn) {
+         var res = isList$1(obj) ? [] : {};
+         pluck$1(obj, function (v, k) {
+           res[k] = fn(v, k);
+           return false;
+         });
+         return res;
+       }
 
-               this._size++;
-               this._root = node;
+       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];
              }
-             return this._root;
-           }
-           /**
-            * @param  {Key} key
-            * @return {Node|null}
-            */
-
-         }, {
-           key: "remove",
-           value: function remove(key) {
-             this._root = this._remove(key, this._root, this._comparator);
            }
-           /**
-            * Deletes i from the tree if it's there
-            */
-
-         }, {
-           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;
+         } else {
+           for (var key in obj) {
+             if (obj.hasOwnProperty(key)) {
+               if (fn(obj[key], key)) {
+                 return obj[key];
                }
-
-               this._size--;
-               return x;
              }
-
-             return t;
-             /* It wasn't there */
            }
-           /**
-            * Removes and returns the node with smallest key
-            */
+         }
+       }
 
-         }, {
-           key: "pop",
-           value: function pop() {
-             var node = this._root;
+       function isList$1(val) {
+         return val != null && typeof val != 'function' && typeof val.length == 'number';
+       }
 
-             if (node) {
-               while (node.left) {
-                 node = node.left;
-               }
+       function isFunction$1(val) {
+         return val && {}.toString.call(val) === '[object Function]';
+       }
 
-               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 isObject$1(val) {
+         return val && {}.toString.call(val) === '[object Object]';
+       }
 
-             return null;
+       var slice = util.slice;
+       var pluck = util.pluck;
+       var each$6 = util.each;
+       var bind = util.bind;
+       var create = util.create;
+       var isList = util.isList;
+       var isFunction = util.isFunction;
+       var isObject = 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);
            }
-           /**
-            * Find without splaying
-            */
 
-         }, {
-           key: "findStatic",
-           value: function findStatic(key) {
-             var current = this._root;
-             var compare = this._comparator;
+           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);
+         }
+       };
 
-             while (current) {
-               var cmp = compare(key, current.key);
-               if (cmp === 0) return current;else if (cmp < 0) current = current.left;else current = current.right;
-             }
+       function _warn() {
+         var _console = typeof console == 'undefined' ? null : console;
 
-             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;
-             }
+         if (!_console) {
+           return;
+         }
 
-             return this._root;
-           }
-         }, {
-           key: "contains",
-           value: function contains(key) {
-             var current = this._root;
-             var compare = this._comparator;
+         var fn = _console.warn ? _console.warn : _console.log;
+         fn.apply(_console, arguments);
+       }
 
-             while (current) {
-               var cmp = compare(key, current.key);
-               if (cmp === 0) return true;else if (cmp < 0) current = current.left;else current = current.right;
-             }
+       function _createStore(storages, plugins, namespace) {
+         if (!namespace) {
+           namespace = '';
+         }
 
-             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;
-               }
-             }
+         if (storages && !isList(storages)) {
+           storages = [storages];
+         }
 
-             return this;
-           }
-           /**
-            * Walk key range from `low` to `high`. Stops if `fn` returns a value.
-            */
+         if (plugins && !isList(plugins)) {
+           plugins = [plugins];
+         }
 
-         }, {
-           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 namespacePrefix = namespace ? '__storejs_' + namespace + '_' : '';
+         var namespaceRegexp = namespace ? new RegExp('^' + namespacePrefix) : null;
+         var legalNamespaces = /^[a-zA-Z0-9_\-]*$/; // alpha-numeric + underscore and dash
 
-                 if (cmp > 0) {
-                   break;
-                 } else if (compare(node.key, low) >= 0) {
-                   if (fn.call(ctx, node)) return this; // stop if smth is returned
-                 }
+         if (!legalNamespaces.test(namespace)) {
+           throw new Error('store.js namespaces can only have alphanumerics + underscores and dashes');
+         }
 
-                 node = node.right;
-               }
+         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];
 
-             return this;
-           }
-           /**
-            * Returns array of keys
-            */
-
-         }, {
-           key: "keys",
-           value: function keys() {
-             var keys = [];
-             this.forEach(function (_ref) {
-               var key = _ref.key;
-               return keys.push(key);
-             });
-             return keys;
-           }
-           /**
-            * Returns array of all the data in the nodes
-            */
+             this[propName] = function pluginFn() {
+               var args = slice(arguments, 0);
+               var self = this; // super_fn calls the old function which was overwritten by
+               // this mixin.
 
-         }, {
-           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 super_fn() {
+                 if (!oldFn) {
+                   return;
+                 }
 
-         }, {
-           key: "at",
-           value: function at(index) {
-             var current = this._root;
-             var done = false;
-             var i = 0;
-             var Q = [];
+                 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.
 
-             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;
-           }
-         }, {
-           key: "next",
-           value: function next(d) {
-             var root = this._root;
-             var successor = null;
+               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 (d.right) {
-               successor = d.right;
 
-               while (successor.left) {
-                 successor = successor.left;
-               }
+             var val = '';
 
-               return successor;
+             try {
+               val = JSON.parse(strVal);
+             } catch (e) {
+               val = strVal;
              }
 
-             var comparator = this._comparator;
+             return val !== undefined ? val : defaultVal;
+           },
+           _addStorage: function _addStorage(storage) {
+             if (this.enabled) {
+               return;
+             }
 
-             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;
+             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.
 
-             return successor;
-           }
-         }, {
-           key: "prev",
-           value: function prev(d) {
-             var root = this._root;
-             var predecessor = null;
+             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.
 
-             if (d.left !== null) {
-               predecessor = d.left;
 
-               while (predecessor.right) {
-                 predecessor = predecessor.right;
-               }
+             var seenPlugin = pluck(this.plugins, function (seenPlugin) {
+               return plugin === seenPlugin;
+             });
 
-               return predecessor;
+             if (seenPlugin) {
+               return;
              }
 
-             var comparator = this._comparator;
+             this.plugins.push(plugin); // Check that the plugin is properly formed
 
-             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;
-               }
+             if (!isFunction(plugin)) {
+               throw new Error('Plugins must be function values that return objects');
              }
 
-             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
-            */
+             var pluginProperties = plugin.call(this);
 
-         }, {
-           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);
-             }
+             if (!isObject(pluginProperties)) {
+               throw new Error('Plugins must return an object of function properties');
+             } // Add the plugin function properties to this store instance.
 
-             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;
 
-             var _split2 = _split(key, this._root, comparator),
-                 left = _split2.left,
-                 right = _split2.right;
+             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 (comparator(key, newKey) < 0) {
-               right = _insert(newKey, newData, right, comparator);
-             } else {
-               left = _insert(newKey, newData, left, comparator);
-             }
+               self._assignPluginFnProp(pluginFnProp, propName);
+             });
+           },
+           // Put deprecated properties in the private API, so as to not expose it to accidential
+           // discovery through inspection of the store object.
+           // Deprecated: addStorage
+           addStorage: function addStorage(storage) {
+             _warn('store.addStorage(storage) is deprecated. Use createStore([storages])');
 
-             this._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;
+             this._addStorage(storage);
            }
-         }, {
-           key: "root",
-           get: function get() {
-             return this._root;
+         };
+         var store = create(_privateStoreProps, storeAPI, {
+           plugins: []
+         });
+         store.raw = {};
+         each$6(store, function (prop, propName) {
+           if (isFunction(prop)) {
+             store.raw[propName] = bind(store, prop);
            }
-         }]);
-
-         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;
-         }
-
-         return null;
+         });
+         each$6(storages, function (storage) {
+           store._addStorage(storage);
+         });
+         each$6(plugins, function (plugin) {
+           store._addPlugin(plugin);
+         });
+         return store;
        }
 
-       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]);
-         }
+       var Global$4 = util.Global;
+       var localStorage_1 = {
+         name: 'localStorage',
+         read: read$5,
+         write: write$5,
+         each: each$5,
+         remove: remove$5,
+         clearAll: clearAll$5
+       };
 
-         p.next = null;
-         return head.next;
+       function localStorage$1() {
+         return Global$4.localStorage;
        }
 
-       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;
-           }
-         }
-
-         p.next = null; // that'll work even if the tree was empty
-
-         return head.next;
+       function read$5(key) {
+         return localStorage$1().getItem(key);
        }
 
-       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 write$5(key, data) {
+         return localStorage$1().setItem(key, data);
        }
 
-       function mergeLists(l1, l2, compare) {
-         var head = new Node$1(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;
+       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);
          }
-
-         return head.next;
        }
 
-       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;
+       function remove$5(key) {
+         return localStorage$1().removeItem(key);
+       }
 
-         while (true) {
-           do {
-             i++;
-           } while (compare(keys[i], pivot) < 0);
+       function clearAll$5() {
+         return localStorage$1().clear();
+       }
 
-           do {
-             j--;
-           } while (compare(keys[j], pivot) > 0);
+       // versions 6 and 7, where no localStorage, etc
+       // is available.
 
-           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 Global$3 = util.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;
 
-         sort$1(keys, values, left, j, compare);
-         sort$1(keys, values, j + 1, right, compare);
+       function read$4(key) {
+         return globalStorage[key];
        }
 
-       function _classCallCheck$1(instance, Constructor) {
-         if (!(instance instanceof Constructor)) {
-           throw new TypeError("Cannot call a class as a function");
-         }
+       function write$4(key, data) {
+         globalStorage[key] = data;
        }
 
-       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 each$4(fn) {
+         for (var i = globalStorage.length - 1; i >= 0; i--) {
+           var key = globalStorage.key(i);
+           fn(globalStorage[key], key);
          }
        }
 
-       function _createClass$1(Constructor, protoProps, staticProps) {
-         if (protoProps) _defineProperties$1(Constructor.prototype, protoProps);
-         if (staticProps) _defineProperties$1(Constructor, staticProps);
-         return Constructor;
+       function remove$4(key) {
+         return globalStorage.removeItem(key);
+       }
+
+       function clearAll$4() {
+         each$4(function (key, _) {
+           delete globalStorage[key];
+         });
        }
-       /**
-        * A bounding box has the format:
-        *
-        *  { ll: { x: xmin, y: ymin }, ur: { x: xmax, y: ymax } }
-        *
-        */
 
+       // versions 6 and 7, where no localStorage, sessionStorage, etc
+       // is available.
 
-       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;
+       var Global$2 = util.Global;
+       var oldIEUserDataStorage = {
+         name: 'oldIE-userDataStorage',
+         write: write$3,
+         read: read$3,
+         each: each$3,
+         remove: remove$3,
+         clearAll: clearAll$3
        };
-       /* 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 storageName = 'storejs';
+       var doc$1 = Global$2.document;
 
+       var _withStorageEl = _makeIEStorageElFunction();
 
-       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 disable = (Global$2.navigator ? Global$2.navigator.userAgent : '').match(/ (MSIE 8|MSIE 9|MSIE 10)\./); // MSIE 9.x, MSIE 10.x
 
-         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 write$3(unfixedKey, data) {
+         if (disable) {
+           return;
+         }
 
-         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
+         var fixedKey = fixKey(unfixedKey);
 
-         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
-        */
+         _withStorageEl(function (storageEl) {
+           storageEl.setAttribute(fixedKey, data);
+           storageEl.save(storageName);
+         });
+       }
 
+       function read$3(unfixedKey) {
+         if (disable) {
+           return;
+         }
 
-       var epsilon$2 = Number.EPSILON; // IE Polyfill
+         var fixedKey = fixKey(unfixedKey);
+         var res = null;
 
-       if (epsilon$2 === undefined) epsilon$2 = Math.pow(2, -52);
-       var EPSILON_SQ = epsilon$2 * epsilon$2;
-       /* FLP comparator */
+         _withStorageEl(function (storageEl) {
+           res = storageEl.getAttribute(fixedKey);
+         });
 
-       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;
+         return res;
+       }
+
+       function each$3(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);
            }
-         } // check if they're flp equal
+         });
+       }
 
+       function remove$3(unfixedKey) {
+         var fixedKey = fixKey(unfixedKey);
 
-         var ab = a - b;
+         _withStorageEl(function (storageEl) {
+           storageEl.removeAttribute(fixedKey);
+           storageEl.save(storageName);
+         });
+       }
 
-         if (ab * ab < EPSILON_SQ * a * b) {
-           return 0;
-         } // normal comparison
+       function clearAll$3() {
+         _withStorageEl(function (storageEl) {
+           var attributes = storageEl.XMLDocument.documentElement.attributes;
+           storageEl.load(storageName);
 
+           for (var i = attributes.length - 1; i >= 0; i--) {
+             storageEl.removeAttribute(attributes[i].name);
+           }
 
-         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.
-        */
+           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 PtRounder = /*#__PURE__*/function () {
-         function PtRounder() {
-           _classCallCheck$1(this, PtRounder);
+       var forbiddenCharsRegex = new RegExp("[!\"#$%&'()*+,/\\\\:;<=>?@[\\]^`{|}~]", "g");
 
-           this.reset();
-         }
+       function fixKey(key) {
+         return key.replace(/^\d/, '___$&').replace(forbiddenCharsRegex, '___');
+       }
 
-         _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)
-             };
-           }
-         }]);
+       function _makeIEStorageElFunction() {
+         if (!doc$1 || !doc$1.documentElement || !doc$1.documentElement.addBehavior) {
+           return null;
+         }
 
-         return PtRounder;
-       }();
+         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.
 
-       var CoordRounder = /*#__PURE__*/function () {
-         function CoordRounder() {
-           _classCallCheck$1(this, CoordRounder);
+         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;
+         }
 
-           this.tree = new Tree(); // preseed with 0 so we don't end up with values < Number.EPSILON
+         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
 
-           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).
+           storageOwner.appendChild(storageEl);
+           storageEl.addBehavior('#default#userData');
+           storageEl.load(storageName);
+           storeFunction.apply(this, args);
+           storageOwner.removeChild(storageEl);
+           return;
+         };
+       }
 
+       // doesn't work but cookies do. This implementation is adopted from
+       // https://developer.mozilla.org/en-US/docs/Web/API/Storage/LocalStorage
 
-         _createClass$1(CoordRounder, [{
-           key: "round",
-           value: function round(coord) {
-             var node = this.tree.add(coord);
-             var prevNode = this.tree.prev(node);
+       var Global$1 = util.Global;
+       var trim = util.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;
 
-             if (prevNode !== null && cmp(node.key, prevNode.key) === 0) {
-               this.tree.remove(coord);
-               return prevNode.key;
-             }
+       function read$2(key) {
+         if (!key || !_has(key)) {
+           return null;
+         }
 
-             var nextNode = this.tree.next(node);
+         var regexpStr = "(?:^|.*;\\s*)" + escape(key).replace(/[\-\.\+\*]/g, "\\$&") + "\\s*\\=\\s*((?:[^;](?!;))*[^;]?).*";
+         return unescape(doc.cookie.replace(new RegExp(regexpStr), "$1"));
+       }
 
-             if (nextNode !== null && cmp(node.key, nextNode.key) === 0) {
-               this.tree.remove(coord);
-               return nextNode.key;
-             }
+       function each$2(callback) {
+         var cookies = doc.cookie.split(/; ?/g);
 
-             return coord;
+         for (var i = cookies.length - 1; i >= 0; i--) {
+           if (!trim(cookies[i])) {
+             continue;
            }
-         }]);
-
-         return CoordRounder;
-       }(); // singleton available by import
 
+           var kvp = cookies[i].split('=');
+           var key = unescape(kvp[0]);
+           var val = unescape(kvp[1]);
+           callback(val, key);
+         }
+       }
 
-       var rounder = new PtRounder();
-       /* Cross Product of two vectors with first point at origin */
+       function write$2(key, data) {
+         if (!key) {
+           return;
+         }
 
-       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 */
+         doc.cookie = escape(key) + "=" + escape(data) + "; expires=Tue, 19 Jan 2038 03:14:07 GMT; path=/";
+       }
 
+       function remove$2(key) {
+         if (!key || !_has(key)) {
+           return;
+         }
 
-       var dotProduct$1 = function dotProduct(a, b) {
-         return a.x * b.x + a.y * b.y;
-       };
-       /* Comparator for two vectors with same starting point */
+         doc.cookie = escape(key) + "=; expires=Thu, 01 Jan 1970 00:00:00 GMT; path=/";
+       }
 
+       function clearAll$2() {
+         each$2(function (_, key) {
+           remove$2(key);
+         });
+       }
 
-       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$1(v1, v2);
-         return cmp(kross, 0);
-       };
+       function _has(key) {
+         return new RegExp("(?:^|;\\s*)" + escape(key).replace(/[\-\.\+\*]/g, "\\$&") + "\\s*\\=").test(doc.cookie);
+       }
 
-       var length = function length(v) {
-         return Math.sqrt(dotProduct$1(v, v));
+       var Global = util.Global;
+       var sessionStorage_1 = {
+         name: 'sessionStorage',
+         read: read$1,
+         write: write$1,
+         each: each$1,
+         remove: remove$1,
+         clearAll: clearAll$1
        };
-       /* Get the sine of the angle from pShared -> pAngle to pShaed -> pBase */
 
+       function sessionStorage() {
+         return Global.sessionStorage;
+       }
 
-       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 */
-
+       function read$1(key) {
+         return sessionStorage().getItem(key);
+       }
 
-       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. */
+       function write$1(key, data) {
+         return sessionStorage().setItem(key, data);
+       }
 
+       function each$1(fn) {
+         for (var i = sessionStorage().length - 1; i >= 0; i--) {
+           var key = sessionStorage().key(i);
+           fn(read$1(key), key);
+         }
+       }
 
-       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. */
+       function remove$1(key) {
+         return sessionStorage().removeItem(key);
+       }
 
+       function clearAll$1() {
+         return sessionStorage().clear();
+       }
 
-       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)
-         };
+       // 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,
+         write: write,
+         each: each,
+         remove: remove,
+         clearAll: clearAll
        };
-       /* 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 memoryStorage = {};
 
+       function read(key) {
+         return memoryStorage[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
+       function write(key, data) {
+         memoryStorage[key] = data;
+       }
 
-         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
+       function each(callback) {
+         for (var key in memoryStorage) {
+           if (memoryStorage.hasOwnProperty(key)) {
+             callback(memoryStorage[key], key);
+           }
+         }
+       }
 
-         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
-         };
-       };
+       function remove(key) {
+         delete memoryStorage[key];
+       }
 
-       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
+       function clearAll(key) {
+         memoryStorage = {};
+       }
 
-             if (a.point !== b.point) a.link(b); // favor right events over left
+       var all = [// Listed in order of usage preference
+       localStorage_1, oldFFGlobalStorage, oldIEUserDataStorage, cookieStorage, sessionStorage_1, memoryStorage_1];
 
-             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
+       /* 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.
 
-             return Segment.compare(a.segment, b.segment);
-           } // for ordering points in sweep line order
+       /*jslint
+           eval, for, this
+       */
 
-         }, {
-           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)
+       /*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 = {};
+       }
 
-         }]);
+       (function () {
 
-         function SweepEvent(point, isLeft) {
-           _classCallCheck$1(this, SweepEvent);
+         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;
 
-           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
+         function f(n) {
+           // Format integers to have at least two digits.
+           return n < 10 ? "0" + n : n;
          }
 
-         _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;
-
-             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];
+         function this_value() {
+           return this.valueOf();
+         }
 
-               if (evt !== this && !evt.segment.ringOut && evt.segment.isInResult()) {
-                 events.push(evt);
-               }
-             }
+         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;
+           };
 
-             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.
-            */
+           Boolean.prototype.toJSON = this_value;
+           Number.prototype.toJSON = this_value;
+           String.prototype.toJSON = this_value;
+         }
 
-         }, {
-           key: "getLeftmostComparator",
-           value: function getLeftmostComparator(baseEvent) {
-             var _this = this;
+         var gap;
+         var indent;
+         var meta;
+         var rep;
 
-             var cache = new Map();
+         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 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)
-               });
-             };
+         function str(key, holder) {
+           // Produce a string from holder[key].
+           var i; // The loop counter.
 
-             return function (a, b) {
-               if (!cache.has(a)) fillCache(a);
-               if (!cache.has(b)) fillCache(b);
+           var k; // The member key.
 
-               var _cache$get = cache.get(a),
-                   asine = _cache$get.sine,
-                   acosine = _cache$get.cosine;
+           var v; // The member value.
 
-               var _cache$get2 = cache.get(b),
-                   bsine = _cache$get2.sine,
-                   bcosine = _cache$get2.cosine; // both on or above x-axis
+           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.
 
-               if (asine >= 0 && bsine >= 0) {
-                 if (acosine < bcosine) return 1;
-                 if (acosine > bcosine) return -1;
-                 return 0;
-               } // both below x-axis
 
+           if (typeof rep === "function") {
+             value = rep.call(holder, key, value);
+           } // What happens next depends on the value's type.
 
-               if (asine < 0 && bsine < 0) {
-                 if (acosine < bcosine) return -1;
-                 if (acosine > bcosine) return 1;
-                 return 0;
-               } // one above x-axis, one below
 
+           switch (_typeof(value)) {
+             case "string":
+               return quote(value);
 
-               if (bsine < asine) return -1;
-               if (bsine > asine) return 1;
-               return 0;
-             };
-           }
-         }]);
+             case "number":
+               // JSON numbers must be finite. Encode non-finite numbers as null.
+               return isFinite(value) ? String(value) : "null";
 
-         return SweepEvent;
-       }(); // segments and sweep events when all else is identical
+             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.
 
+             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.
 
-       var segmentId = 0;
 
-       var Segment = /*#__PURE__*/function () {
-         _createClass$1(Segment, null, [{
-           key: "compare",
+               gap += indent;
+               partial = []; // Is the value an array?
 
-           /* 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 (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 (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?
+                 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 (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 ?
+                 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 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 (rep && _typeof(rep) === "object") {
+                 length = rep.length;
 
+                 for (i = 0; i < length; i += 1) {
+                   if (typeof rep[i] === "string") {
+                     k = rep[i];
+                     v = str(k, value);
 
-             if (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 (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 bCmpALeft = b.comparePoint(a.leftSE.point);
-               if (bCmpALeft !== 0) return bCmpALeft; // is the B right endpoint colinear to segment A?
+                     if (v) {
+                       partial.push(quote(k) + (gap ? ": " : ":") + v);
+                     }
+                   }
+                 }
+               } // Join all of the member texts together, separated with commas,
+               // and wrap them in braces.
 
-               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
+               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.
 
 
-             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 (typeof JSON.stringify !== "function") {
+           meta = {
+             // table of character substitutions
+             "\b": "\\b",
+             "\t": "\\t",
+             "\n": "\\n",
+             "\f": "\\f",
+             "\r": "\\r",
+             "\"": "\\\"",
+             "\\": "\\\\"
+           };
 
-             if (arx < brx) {
-               var _bCmpARight = b.comparePoint(a.rightSE.point);
+           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.
 
-               if (_bCmpARight !== 0) return _bCmpARight;
-             } // is the B right endpoint more left-more?
+             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.
 
-             if (arx > brx) {
-               var _aCmpBRight = a.comparePoint(b.rightSE.point);
 
-               if (_aCmpBRight < 0) return 1;
-               if (_aCmpBRight > 0) return -1;
-             }
+             rep = replacer;
 
-             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 (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 (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
+             return str("", {
+               "": value
+             });
+           };
+         } // If the JSON object does not yet have a parse method, give it one.
 
-             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
+         if (typeof JSON.parse !== "function") {
+           JSON.parse = function (text, reviver) {
+             // The parse method takes a text and an optional reviver function, and returns
+             // a JavaScript value if the text is a valid JSON text.
+             var j;
 
-             return 0;
-           }
-           /* Warning: a reference to ringWindings input will be stored,
-            *  and possibly will be later modified */
+             function walk(holder, key) {
+               // The walk method is used to recursively walk the resulting structure so
+               // that modifications can be made.
+               var k;
+               var v;
+               var value = holder[key];
 
-         }]);
+               if (value && _typeof(value) === "object") {
+                 for (k in value) {
+                   if (Object.prototype.hasOwnProperty.call(value, k)) {
+                     v = walk(value, k);
 
-         function Segment(leftSE, rightSE, rings, windings) {
-           _classCallCheck$1(this, Segment);
+                     if (v !== undefined) {
+                       value[k] = v;
+                     } else {
+                       delete value[k];
+                     }
+                   }
+                 }
+               }
 
-           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
-         }
+               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.
 
-         _createClass$1(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 */
+             text = String(text);
+             rx_dangerous.lastIndex = 0;
 
-         }, {
-           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)
-            */
+             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.
 
-         }, {
-           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.
+             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.
 
-             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.
-            */
+             throw new SyntaxError("JSON.parse");
+           };
+         }
+       })();
 
-         }, {
-           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 json2 = json2Plugin;
 
-             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
+       function json2Plugin() {
+         return {};
+       }
 
-             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 plugins = [json2];
+       var store_legacy = storeEngine.createStore(all, plugins);
 
-             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
+       var immutable = extend;
+       var hasOwnProperty = Object.prototype.hasOwnProperty;
 
-               return null;
-             } // does this left endpoint matches (other doesn't)
+       function extend() {
+         var target = {};
 
+         for (var i = 0; i < arguments.length; i++) {
+           var source = arguments[i];
 
-             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
+           for (var key in source) {
+             if (hasOwnProperty.call(source, key)) {
+               target[key] = source[key];
+             }
+           }
+         }
 
+         return target;
+       }
 
-               return tlp;
-             } // does other left endpoint matches (this doesn't)
+       //
+       // 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.
 
 
-             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
+       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
 
+         oauth.authenticated = function () {
+           return !!(token('oauth_token') && token('oauth_token_secret'));
+         };
 
-               return olp;
-             } // trivial intersection on right endpoints
+         oauth.logout = function () {
+           token('oauth_token', '');
+           token('oauth_token_secret', '');
+           token('oauth_request_token_secret', '');
+           return oauth;
+         }; // TODO: detect lack of click event
 
 
-             if (touchesThisRSE && touchesOtherRSE) return null; // t-intersections on just one right endpoint
+         oauth.authenticate = function (callback) {
+           if (oauth.authenticated()) return callback();
+           oauth.logout(); // ## Getting a request token
 
-             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 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));
 
-             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
+           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 (pt === null) return null; // is the intersection found between the lines not on the segments?
+             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 (!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
-            */
+           ohauth_1.xhr('POST', url, params, null, {}, reqTokenDone);
+           o.loading();
 
-         }, {
-           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
+           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(o.landing)
+             });
 
-             if (SweepEvent$1.comparePoints(newSeg.leftSE.point, newSeg.rightSE.point) > 0) {
-               newSeg.swapEvents();
+             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 (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
+
+           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 (alreadyLinked) {
-               newLeftSE.checkForConsuming();
-               newRightSE.checkForConsuming();
-             }
+           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 newEvents;
+             ohauth_1.xhr('POST', url, params, null, {}, accessTokenDone);
+             o.loading();
            }
-           /* 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;
+           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);
+           }
+         };
 
-             for (var i = 0, iMax = this.windings.length; i < iMax; i++) {
-               this.windings[i] *= -1;
+         oauth.bringPopupWindowToFront = function () {
+           var brougtPopupToFront = false;
+
+           try {
+             // This may cause a cross-origin error:
+             // `DOMException: Blocked a frame with origin "..." from accessing a cross-origin frame.`
+             if (oauth.popupWindow && !oauth.popupWindow.closed) {
+               oauth.popupWindow.focus();
+               brougtPopupToFront = true;
              }
+           } catch (err) {// Bringing popup window to front failed (probably because of the cross-origin error mentioned above)
            }
-           /* 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;
+           return brougtPopupToFront;
+         };
 
-             while (consumer.consumedBy) {
-               consumer = consumer.consumedBy;
-             }
+         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`
 
-             while (consumee.consumedBy) {
-               consumee = consumee.consumedBy;
-             }
+             ohauth_1.xhr('POST', url, params, null, {}, accessTokenDone);
+             o.loading();
+           }
 
-             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
+           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 (cmp > 0) {
-               var tmp = consumer;
-               consumer = consumee;
-               consumee = tmp;
-             } // make sure a segment doesn't consume it's prev
+           get_access_token(oauth_token);
+         }; // # xhr
+         //
+         // A single XMLHttpRequest wrapper that does authenticated calls if the
+         // user has logged in.
 
 
-             if (consumer.prev === consumee) {
-               var _tmp = consumer;
-               consumer = consumee;
-               consumee = _tmp;
+         oauth.xhr = function (options, callback) {
+           if (!oauth.authenticated()) {
+             if (o.auto) {
+               return oauth.authenticate(run);
+             } else {
+               callback('not authenticated', null);
+               return;
              }
+           } else {
+             return run();
+           }
 
-             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 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 (index === -1) {
-                 consumer.rings.push(ring);
-                 consumer.windings.push(winding);
-               } else consumer.windings[index] += winding;
+             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));
              }
 
-             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;
+             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);
            }
-           /* 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;
+           function done(err, xhr) {
+             if (err) return callback(err);else if (xhr.responseXML) return callback(err, xhr.responseXML);else return callback(err, xhr.response);
            }
-         }, {
-           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
+         }; // pre-authorize this object, if we can just get a token and token_secret
+         // from the start
 
-             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
+         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
 
-             var polysAfter = [];
-             var polysExclude = [];
+           o.loading = o.loading || function () {};
 
-             for (var _i = 0, _iMax = ringsAfter.length; _i < _iMax; _i++) {
-               if (windingsAfter[_i] === 0) continue; // non-zero rule
+           o.done = o.done || function () {};
 
-               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 oauth.preauth(o);
+         }; // 'stamp' an authentication object from `getAuth()`
+         // with a [nonce](http://en.wikipedia.org/wiki/Cryptographic_nonce)
+         // and timestamp
 
-                 var _index = polysAfter.indexOf(_ring.poly);
 
-                 if (_index !== -1) polysAfter.splice(_index, 1);
-               }
-             } // calculate multiPolysAfter
+         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
 
 
-             for (var _i2 = 0, _iMax2 = polysAfter.length; _i2 < _iMax2; _i2++) {
-               var mp = polysAfter[_i2].multiPoly;
-               if (mpsAfter.indexOf(mp) === -1) mpsAfter.push(mp);
-             }
+         var token;
 
-             return this._afterState;
-           }
-           /* Is this segment part of the final result? */
+         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);
+           };
+         } else {
+           var storage = {};
 
-         }, {
-           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;
+           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
 
-             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;
+         function getAuth(o) {
+           return {
+             oauth_consumer_key: o.oauth_consumer_key,
+             oauth_signature_method: 'HMAC-SHA1'
+           };
+         } // potentially pre-authorize
 
-                   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;
-                 }
+         oauth.options(o);
+         return oauth;
+       };
+
+       var tiler$2 = utilTiler();
+       var dispatch$2 = dispatch$8('apiStatusChange', 'authLoading', 'authDone', 'change', 'loading', 'loaded', 'loadedNotes');
+       var urlroot = 'https://www.openstreetmap.org';
+       var oauth = osmAuth({
+         url: urlroot,
+         oauth_consumer_key: '5A043yRSEugj4DJ5TljuapfnrflWDte8jTOcWLlT',
+         oauth_secret: 'aB3jKq1TRsCOUrfOIZ6oQMEDmv2ptV76PA54NGLL',
+         loading: authLoading,
+         done: authDone
+       }); // hardcode default block of Google Maps
+
+       var _imageryBlocklists = [/.*\.google(apis)?\..*\/(vt|kh)[\?\/].*([xyz]=.*){3}.*/];
+       var _tileCache = {
+         toLoad: {},
+         loaded: {},
+         inflight: {},
+         seen: {},
+         rtree: new RBush()
+       };
+       var _noteCache = {
+         toLoad: {},
+         loaded: {},
+         inflight: {},
+         inflightPost: {},
+         note: {},
+         closed: {},
+         rtree: new RBush()
+       };
+       var _userCache = {
+         toLoad: {},
+         user: {}
+       };
+
+       var _cachedApiStatus;
 
-               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 _changeset = {};
 
-               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 _deferred = new Set();
 
-                   this._isInResult = isJustSubject(mpsBefore) !== isJustSubject(mpsAfter);
-                   break;
-                 }
+       var _connectionID = 1;
+       var _tileZoom = 16;
+       var _noteZoom = 12;
 
-               default:
-                 throw new Error("Unrecognized operation type found ".concat(operation.type));
-             }
+       var _rateLimitError;
 
-             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 _userChangesets;
 
-             var cmpPts = SweepEvent$1.comparePoints(pt1, pt2);
+       var _userDetails;
 
-             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 _off; // set a default but also load this from the API status
 
-             var leftSE = new SweepEvent$1(leftPt, true);
-             var rightSE = new SweepEvent$1(rightPt, false);
-             return new Segment(leftSE, rightSE, [ring], [winding]);
-           }
-         }]);
 
-         return Segment;
-       }();
+       var _maxWayNodes = 2000;
 
-       var RingIn = /*#__PURE__*/function () {
-         function RingIn(geomRing, poly, isExterior) {
-           _classCallCheck$1(this, RingIn);
+       function authLoading() {
+         dispatch$2.call('authLoading');
+       }
 
-           if (!Array.isArray(geomRing) || geomRing.length === 0) {
-             throw new Error('Input geometry is not a valid Polygon or MultiPolygon');
-           }
+       function authDone() {
+         dispatch$2.call('authDone');
+       }
 
-           this.poly = poly;
-           this.isExterior = isExterior;
-           this.segments = [];
+       function abortRequest$2(controllerOrXHR) {
+         if (controllerOrXHR) {
+           controllerOrXHR.abort();
+         }
+       }
 
-           if (typeof geomRing[0][0] !== 'number' || typeof geomRing[0][1] !== 'number') {
-             throw new Error('Input geometry is not a valid Polygon or MultiPolygon');
-           }
+       function hasInflightRequests(cache) {
+         return Object.keys(cache.inflight).length;
+       }
 
-           var firstPoint = rounder.round(geomRing[0][0], geomRing[0][1]);
-           this.bbox = {
-             ll: {
-               x: firstPoint.x,
-               y: firstPoint.y
-             },
-             ur: {
-               x: firstPoint.x,
-               y: firstPoint.y
-             }
-           };
-           var prevPoint = firstPoint;
+       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];
+         });
+       }
 
-           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');
-             }
+       function getLoc(attrs) {
+         var lon = attrs.lon && attrs.lon.value;
+         var lat = attrs.lat && attrs.lat.value;
+         return [parseFloat(lon), parseFloat(lat)];
+       }
 
-             var point = rounder.round(geomRing[i][0], geomRing[i][1]); // skip repeated points
+       function getNodes(obj) {
+         var elems = obj.getElementsByTagName('nd');
+         var nodes = new Array(elems.length);
 
-             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
+         for (var i = 0, l = elems.length; i < l; i++) {
+           nodes[i] = 'n' + elems[i].attributes.ref.value;
+         }
+
+         return nodes;
+       }
 
+       function getNodesJSON(obj) {
+         var elems = obj.nodes;
+         var nodes = new Array(elems.length);
 
-           if (firstPoint.x !== prevPoint.x || firstPoint.y !== prevPoint.y) {
-             this.segments.push(Segment.fromRing(prevPoint, firstPoint, this));
-           }
+         for (var i = 0, l = elems.length; i < l; i++) {
+           nodes[i] = 'n' + elems[i];
          }
 
-         _createClass$1(RingIn, [{
-           key: "getSweepEvents",
-           value: function getSweepEvents() {
-             var sweepEvents = [];
+         return nodes;
+       }
 
-             for (var i = 0, iMax = this.segments.length; i < iMax; i++) {
-               var segment = this.segments[i];
-               sweepEvents.push(segment.leftSE);
-               sweepEvents.push(segment.rightSE);
-             }
+       function getTags(obj) {
+         var elems = obj.getElementsByTagName('tag');
+         var tags = {};
 
-             return sweepEvents;
-           }
-         }]);
+         for (var i = 0, l = elems.length; i < l; i++) {
+           var attrs = elems[i].attributes;
+           tags[attrs.k.value] = attrs.v.value;
+         }
 
-         return RingIn;
-       }();
+         return tags;
+       }
 
-       var PolyIn = /*#__PURE__*/function () {
-         function PolyIn(geomPoly, multiPoly) {
-           _classCallCheck$1(this, PolyIn);
+       function getMembers(obj) {
+         var elems = obj.getElementsByTagName('member');
+         var members = new Array(elems.length);
 
-           if (!Array.isArray(geomPoly)) {
-             throw new Error('Input geometry is not a valid Polygon or MultiPolygon');
-           }
+         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
+           };
+         }
 
-           this.exteriorRing = new RingIn(geomPoly[0], this, true); // copy by value
+         return members;
+       }
 
-           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
-             }
+       function getMembersJSON(obj) {
+         var elems = obj.members;
+         var members = new Array(elems.length);
+
+         for (var i = 0, l = elems.length; i < l; i++) {
+           var attrs = elems[i];
+           members[i] = {
+             id: attrs.type[0] + attrs.ref,
+             type: attrs.type,
+             role: attrs.role
            };
-           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);
-           }
+         return members;
+       }
 
-           this.multiPoly = multiPoly;
-         }
+       function getVisible(attrs) {
+         return !attrs.visible || attrs.visible.value !== 'false';
+       }
 
-         _createClass$1(PolyIn, [{
-           key: "getSweepEvents",
-           value: function getSweepEvents() {
-             var sweepEvents = this.exteriorRing.getSweepEvents();
+       function parseComments(comments) {
+         var parsedComments = []; // for each comment
 
-             for (var i = 0, iMax = this.interiorRings.length; i < iMax; i++) {
-               var ringSweepEvents = this.interiorRings[i].getSweepEvents();
+         for (var i = 0; i < comments.length; i++) {
+           var comment = comments[i];
 
-               for (var j = 0, jMax = ringSweepEvents.length; j < jMax; j++) {
-                 sweepEvents.push(ringSweepEvents[j]);
+           if (comment.nodeName === 'comment') {
+             var childNodes = comment.childNodes;
+             var parsedComment = {};
+
+             for (var j = 0; j < childNodes.length; j++) {
+               var node = childNodes[j];
+               var nodeName = node.nodeName;
+               if (nodeName === '#text') continue;
+               parsedComment[nodeName] = node.textContent;
+
+               if (nodeName === 'uid') {
+                 var uid = node.textContent;
+
+                 if (uid && !_userCache.user[uid]) {
+                   _userCache.toLoad[uid] = true;
+                 }
                }
              }
 
-             return sweepEvents;
+             if (parsedComment) {
+               parsedComments.push(parsedComment);
+             }
            }
-         }]);
+         }
 
-         return PolyIn;
-       }();
+         return parsedComments;
+       }
 
-       var MultiPolyIn = /*#__PURE__*/function () {
-         function MultiPolyIn(geom, isSubject) {
-           _classCallCheck$1(this, MultiPolyIn);
+       function encodeNoteRtree(note) {
+         return {
+           minX: note.loc[0],
+           minY: note.loc[1],
+           maxX: note.loc[0],
+           maxY: note.loc[1],
+           data: note
+         };
+       }
 
-           if (!Array.isArray(geom)) {
-             throw new Error('Input geometry is not a valid Polygon or MultiPolygon');
-           }
+       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'
+           };
+         }
+       };
 
-           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.
-           }
+       function parseJSON(payload, callback, options) {
+         options = Object.assign({
+           skipSeen: true
+         }, options);
 
-           this.polys = [];
-           this.bbox = {
-             ll: {
-               x: Number.POSITIVE_INFINITY,
-               y: Number.POSITIVE_INFINITY
-             },
-             ur: {
-               x: Number.NEGATIVE_INFINITY,
-               y: Number.NEGATIVE_INFINITY
-             }
-           };
+         if (!payload) {
+           return callback({
+             message: 'No JSON',
+             status: -1
+           });
+         }
 
-           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);
+         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);
+
+           var results = [];
+           var result;
+
+           for (var i = 0; i < children.length; i++) {
+             result = parseChild(children[i]);
+             if (result) results.push(result);
            }
 
-           this.isSubject = isSubject;
-         }
+           callback(null, results);
+         });
 
-         _createClass$1(MultiPolyIn, [{
-           key: "getSweepEvents",
-           value: function getSweepEvents() {
-             var sweepEvents = [];
+         _deferred.add(handle);
 
-             for (var i = 0, iMax = this.polys.length; i < iMax; i++) {
-               var polySweepEvents = this.polys[i].getSweepEvents();
+         function parseChild(child) {
+           var parser = jsonparsers[child.type];
+           if (!parser) return null;
+           var uid;
+           uid = osmEntity.id.fromOSM(child.type, child.id);
 
-               for (var j = 0, jMax = polySweepEvents.length; j < jMax; j++) {
-                 sweepEvents.push(polySweepEvents[j]);
-               }
-             }
+           if (options.skipSeen) {
+             if (_tileCache.seen[uid]) return null; // avoid reparsing a "seen" entity
 
-             return sweepEvents;
+             _tileCache.seen[uid] = true;
            }
-         }]);
-
-         return MultiPolyIn;
-       }();
 
-       var RingOut = /*#__PURE__*/function () {
-         _createClass$1(RingOut, null, [{
-           key: "factory",
+           return parser(child, uid);
+         }
+       }
 
-           /* 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 = [];
+       function parseUserJSON(payload, callback, options) {
+         options = Object.assign({
+           skipSeen: true
+         }, options);
 
-             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 */
+         if (!payload) {
+           return callback({
+             message: 'No JSON',
+             status: -1
+           });
+         }
 
-               while (true) {
-                 prevEvent = event;
-                 event = nextEvent;
-                 events.push(event);
-                 /* Is the ring complete? */
+         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);
 
-                 if (event.point === startingPoint) break;
+           var results = [];
+           var result;
 
-                 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. */
+           for (var i = 0; i < objs.length; i++) {
+             result = parseObj(objs[i]);
+             if (result) results.push(result);
+           }
 
-                   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 */
+           callback(null, results);
+         });
 
+         _deferred.add(handle);
 
-                   if (availableLEs.length === 1) {
-                     nextEvent = availableLEs[0].otherSE;
-                     break;
-                   }
-                   /* We must have an intersection. Check for a completed loop */
+         function parseObj(obj) {
+           var uid = obj.user.id && obj.user.id.toString();
 
+           if (options.skipSeen && _userCache.user[uid]) {
+             delete _userCache.toLoad[uid];
+             return null;
+           }
 
-                   var indexLE = null;
+           var user = jsonparsers.user(obj.user, uid);
+           _userCache.user[uid] = user;
+           delete _userCache.toLoad[uid];
+           return user;
+         }
+       }
 
-                   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 */
+       var parsers = {
+         node: function nodeData(obj, uid) {
+           var attrs = obj.attributes;
+           return new osmNode({
+             id: uid,
+             visible: getVisible(attrs),
+             version: attrs.version.value,
+             changeset: attrs.changeset && attrs.changeset.value,
+             timestamp: attrs.timestamp && attrs.timestamp.value,
+             user: attrs.user && attrs.user.value,
+             uid: attrs.uid && attrs.uid.value,
+             loc: getLoc(attrs),
+             tags: getTags(obj)
+           });
+         },
+         way: function wayData(obj, uid) {
+           var attrs = obj.attributes;
+           return new osmWay({
+             id: uid,
+             visible: getVisible(attrs),
+             version: attrs.version.value,
+             changeset: attrs.changeset && attrs.changeset.value,
+             timestamp: attrs.timestamp && attrs.timestamp.value,
+             user: attrs.user && attrs.user.value,
+             uid: attrs.uid && attrs.uid.value,
+             tags: getTags(obj),
+             nodes: getNodes(obj)
+           });
+         },
+         relation: function relationData(obj, uid) {
+           var attrs = obj.attributes;
+           return new osmRelation({
+             id: uid,
+             visible: getVisible(attrs),
+             version: attrs.version.value,
+             changeset: attrs.changeset && attrs.changeset.value,
+             timestamp: attrs.timestamp && attrs.timestamp.value,
+             user: attrs.user && attrs.user.value,
+             uid: attrs.uid && attrs.uid.value,
+             tags: getTags(obj),
+             members: getMembers(obj)
+           });
+         },
+         note: function parseNote(obj, uid) {
+           var attrs = obj.attributes;
+           var childNodes = obj.childNodes;
+           var props = {};
+           props.id = uid;
+           props.loc = getLoc(attrs); // if notes are coincident, move them apart slightly
 
+           var coincident = false;
+           var epsilon = 0.00001;
 
-                   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 */
+           do {
+             if (coincident) {
+               props.loc = geoVecAdd(props.loc, [epsilon, epsilon]);
+             }
 
+             var bbox = geoExtent(props.loc).bbox();
+             coincident = _noteCache.rtree.search(bbox).length;
+           } while (coincident); // parse note contents
 
-                   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;
-                 }
-               }
+           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
 
-               ringsOut.push(new RingOut(events));
+             if (nodeName === 'comments') {
+               props[nodeName] = parseComments(node.childNodes);
+             } else {
+               props[nodeName] = node.textContent;
              }
-
-             return ringsOut;
            }
-         }]);
-
-         function RingOut(events) {
-           _classCallCheck$1(this, RingOut);
 
-           this.events = events;
+           var note = new osmNote(props);
+           var item = encodeNoteRtree(note);
+           _noteCache.note[note.id] = note;
 
-           for (var i = 0, iMax = events.length; i < iMax; i++) {
-             events[i].segment.ringOut = this;
-           }
+           _noteCache.rtree.insert(item);
 
-           this.poly = null;
-         }
+           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');
 
-         _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];
+           if (img && img[0] && img[0].getAttribute('href')) {
+             user.image_url = img[0].getAttribute('href');
+           }
 
-             for (var i = 1, iMax = this.events.length - 1; i < iMax; i++) {
-               var _pt = this.events[i].point;
-               var _nextPt = this.events[i + 1].point;
-               if (compareVectorAngles(_pt, prevPt, _nextPt) === 0) continue;
-               points.push(_pt);
-               prevPt = _pt;
-             } // ring was all (within rounding error of angle calc) colinear points
+           var changesets = obj.getElementsByTagName('changesets');
 
+           if (changesets && changesets[0] && changesets[0].getAttribute('count')) {
+             user.changesets_count = changesets[0].getAttribute('count');
+           }
 
-             if (points.length === 1) return null; // check if the starting point is necessary
+           var blocks = obj.getElementsByTagName('blocks');
 
-             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 = [];
+           if (blocks && blocks[0]) {
+             var received = blocks[0].getElementsByTagName('received');
 
-             for (var _i = iStart; _i != iEnd; _i += step) {
-               orderedPoints.push([points[_i].x, points[_i].y]);
+             if (received && received[0] && received[0].getAttribute('active')) {
+               user.active_blocks = received[0].getAttribute('active');
              }
-
-             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();
-             }
+           _userCache.user[uid] = user;
+           delete _userCache.toLoad[uid];
+           return user;
+         }
+       };
 
-             return this._enclosingRing;
-           }
-           /* Returns the ring that encloses this one, if any */
+       function parseXML(xml, callback, options) {
+         options = Object.assign({
+           skipSeen: true
+         }, options);
 
-         }, {
-           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];
+         if (!xml || !xml.childNodes) {
+           return callback({
+             message: 'No XML',
+             status: -1
+           });
+         }
 
-             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 root = xml.childNodes[0];
+         var children = root.childNodes;
+         var handle = window.requestIdleCallback(function () {
+           _deferred["delete"](handle);
 
-             var prevSeg = leftMostEvt.segment.prevInResult();
-             var prevPrevSeg = prevSeg ? prevSeg.prevInResult() : null;
+           var results = [];
+           var result;
 
-             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
+           for (var i = 0; i < children.length; i++) {
+             result = parseChild(children[i]);
+             if (result) results.push(result);
+           }
 
-               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
+           callback(null, results);
+         });
 
-               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
+         _deferred.add(handle);
+
+         function parseChild(child) {
+           var parser = parsers[child.nodeName];
+           if (!parser) return null;
+           var uid;
 
+           if (child.nodeName === 'user') {
+             uid = child.attributes.id.value;
 
-               prevSeg = prevPrevSeg.prevInResult();
-               prevPrevSeg = prevSeg ? prevSeg.prevInResult() : null;
+             if (options.skipSeen && _userCache.user[uid]) {
+               delete _userCache.toLoad[uid];
+               return null;
              }
-           }
-         }]);
+           } else if (child.nodeName === 'note') {
+             uid = child.getElementsByTagName('id')[0].textContent;
+           } else {
+             uid = osmEntity.id.fromOSM(child.nodeName, child.attributes.id.value);
 
-         return RingOut;
-       }();
+             if (options.skipSeen) {
+               if (_tileCache.seen[uid]) return null; // avoid reparsing a "seen" entity
 
-       var PolyOut = /*#__PURE__*/function () {
-         function PolyOut(exteriorRing) {
-           _classCallCheck$1(this, PolyOut);
+               _tileCache.seen[uid] = true;
+             }
+           }
 
-           this.exteriorRing = exteriorRing;
-           exteriorRing.poly = this;
-           this.interiorRings = [];
+           return parser(child, uid);
          }
+       } // replace or remove note from rtree
 
-         _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;
+       function updateRtree(item, replace) {
+         _noteCache.rtree.remove(item, function isEql(a, b) {
+           return a.data.id === b.data.id;
+         });
 
-             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 (replace) {
+           _noteCache.rtree.insert(item);
+         }
+       }
 
-               if (ringGeom === null) continue;
-               geom.push(ringGeom);
+       function wrapcb(thisArg, callback, cid) {
+         return function (err, result) {
+           if (err) {
+             // 400 Bad Request, 401 Unauthorized, 403 Forbidden..
+             if (err.status === 400 || err.status === 401 || err.status === 403) {
+               thisArg.logout();
              }
 
-             return geom;
+             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);
            }
-         }]);
-
-         return PolyOut;
-       }();
-
-       var MultiPolyOut = /*#__PURE__*/function () {
-         function MultiPolyOut(rings) {
-           _classCallCheck$1(this, MultiPolyOut);
-
-           this.rings = rings;
-           this.polys = this._composePolys(rings);
-         }
+         };
+       }
 
-         _createClass$1(MultiPolyOut, [{
-           key: "getGeom",
-           value: function getGeom() {
-             var geom = [];
+       var serviceOsm = {
+         init: function init() {
+           utilRebind(this, dispatch$2, 'on');
+         },
+         reset: function reset() {
+           Array.from(_deferred).forEach(function (handle) {
+             window.cancelIdleCallback(handle);
 
-             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
+             _deferred["delete"](handle);
+           });
+           _connectionID++;
+           _userChangesets = undefined;
+           _userDetails = undefined;
+           _rateLimitError = undefined;
+           Object.values(_tileCache.inflight).forEach(abortRequest$2);
+           Object.values(_noteCache.inflight).forEach(abortRequest$2);
+           Object.values(_noteCache.inflightPost).forEach(abortRequest$2);
+           if (_changeset.inflight) abortRequest$2(_changeset.inflight);
+           _tileCache = {
+             toLoad: {},
+             loaded: {},
+             inflight: {},
+             seen: {},
+             rtree: new RBush()
+           };
+           _noteCache = {
+             toLoad: {},
+             loaded: {},
+             inflight: {},
+             inflightPost: {},
+             note: {},
+             closed: {},
+             rtree: new RBush()
+           };
+           _userCache = {
+             toLoad: {},
+             user: {}
+           };
+           _cachedApiStatus = undefined;
+           _changeset = {};
+           return this;
+         },
+         getConnectionId: function getConnectionId() {
+           return _connectionID;
+         },
+         changesetURL: function changesetURL(changesetID) {
+           return urlroot + '/changeset/' + changesetID;
+         },
+         changesetsURL: function changesetsURL(center, zoom) {
+           var precision = Math.max(0, Math.ceil(Math.log(zoom) / Math.LN2));
+           return urlroot + '/history#map=' + Math.floor(zoom) + '/' + center[1].toFixed(precision) + '/' + center[0].toFixed(precision);
+         },
+         entityURL: function entityURL(entity) {
+           return urlroot + '/' + entity.type + '/' + entity.osmId();
+         },
+         historyURL: function historyURL(entity) {
+           return urlroot + '/' + entity.type + '/' + entity.osmId() + '/history';
+         },
+         userURL: function userURL(username) {
+           return urlroot + '/user/' + username;
+         },
+         noteURL: function noteURL(note) {
+           return urlroot + '/note/' + note.id;
+         },
+         noteReportURL: function noteReportURL(note) {
+           return urlroot + '/reports/new?reportable_type=Note&reportable_id=' + note.id;
+         },
+         // Generic method to load data from the OSM API
+         // Can handle either auth or unauth calls.
+         loadFromAPI: function loadFromAPI(path, callback, options) {
+           options = Object.assign({
+             skipSeen: true
+           }, options);
+           var that = this;
+           var cid = _connectionID;
 
-               if (polyGeom === null) continue;
-               geom.push(polyGeom);
+           function done(err, payload) {
+             if (that.getConnectionId() !== cid) {
+               if (callback) callback({
+                 message: 'Connection Switched',
+                 status: -1
+               });
+               return;
              }
 
-             return geom;
-           }
-         }, {
-           key: "_composePolys",
-           value: function _composePolys(rings) {
-             var polys = [];
+             var isAuthenticated = that.authenticated(); // 400 Bad Request, 401 Unauthorized, 403 Forbidden
+             // Logout and retry the request..
 
-             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);
+             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();
                }
-             }
 
-             return polys;
+               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 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.)
-        */
 
+           if (this.authenticated()) {
+             return oauth.xhr({
+               method: 'GET',
+               path: path
+             }, done);
+           } else {
+             var url = urlroot + path;
+             var controller = new AbortController();
+             var fn;
 
-       var SweepLine = /*#__PURE__*/function () {
-         function SweepLine(queue) {
-           var comparator = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : Segment.compare;
-
-           _classCallCheck$1(this, SweepLine);
+             if (path.indexOf('.json') !== -1) {
+               fn = d3_json;
+             } else {
+               fn = d3_xml;
+             }
 
-           this.queue = queue;
-           this.tree = new Tree(comparator);
-           this.segments = [];
-         }
+             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
 
-         _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
+               var match = err.message.match(/^\d{3}/);
 
-             if (event.consumedBy) {
-               if (event.isLeft) this.queue.remove(event.otherSE);else this.tree.remove(segment);
-               return newEvents;
-             }
+               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
 
-             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
+             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;
 
-             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
+           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;
 
-             while (nextSeg === undefined) {
-               nextNode = this.tree.next(nextNode);
-               if (nextNode === null) nextSeg = null;else if (nextNode.key.consumedBy === undefined) nextSeg = nextNode.key;
+             if (err) {
+               return callback(err, changeset);
              }
 
-             if (event.isLeft) {
-               // Check for intersections against the previous segment in the sweep line
-               var prevMySplitter = null;
+             _changeset.open = changesetID;
+             changeset = changeset.update({
+               id: changesetID
+             }); // Upload the changeset..
 
-               if (prevSeg) {
-                 var prevInter = prevSeg.getIntersection(segment);
+             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 (prevInter !== null) {
-                   if (!segment.isAnEndpoint(prevInter)) prevMySplitter = prevInter;
+           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
 
-                   if (!prevSeg.isAnEndpoint(prevInter)) {
-                     var newEventsFromSplit = this._splitSafely(prevSeg, prevInter);
+             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.
 
-                     for (var i = 0, iMax = newEventsFromSplit.length; i < iMax; i++) {
-                       newEvents.push(newEventsFromSplit[i]);
-                     }
+             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'
                    }
                  }
-               } // Check for intersections against the next segment in the sweep line
+               }, 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
+           }
 
-               var nextMySplitter = null;
+           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));
 
-               if (nextSeg) {
-                 var nextInter = nextSeg.getIntersection(segment);
+           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]);
+           }
 
-                 if (nextInter !== null) {
-                   if (!segment.isAnEndpoint(nextInter)) nextMySplitter = nextInter;
+           oauth.xhr({
+             method: 'GET',
+             path: '/api/0.6/user/' + uid + '.json'
+           }, wrapcb(this, done, _connectionID));
 
-                   if (!nextSeg.isAnEndpoint(nextInter)) {
-                     var _newEventsFromSplit = this._splitSafely(nextSeg, nextInter);
+           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);
+           }
 
-                     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().
+           oauth.xhr({
+             method: 'GET',
+             path: '/api/0.6/user/details.json'
+           }, wrapcb(this, done, _connectionID));
 
+           function done(err, payload) {
+             if (err) return callback(err);
+             var options = {
+               skipSeen: false
+             };
+             return parseUserJSON(payload, function (err, results) {
+               if (err) return callback(err);
+               _userDetails = results[0];
+               return callback(undefined, _userDetails);
+             }, options);
+           }
+         },
+         // Load previous changesets for the logged in user
+         // GET /api/0.6/changesets?user=#id
+         userChangesets: function userChangesets(callback) {
+           if (_userChangesets) {
+             // retrieve cached
+             return callback(undefined, _userChangesets);
+           }
 
-               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
+           this.userDetails(wrapcb(this, gotDetails, _connectionID));
 
-                 this.queue.remove(segment.rightSE);
-                 newEvents.push(segment.rightSE);
+           function gotDetails(err, user) {
+             if (err) {
+               return callback(err);
+             }
 
-                 var _newEventsFromSplit2 = segment.split(mySplitter);
+             oauth.xhr({
+               method: 'GET',
+               path: '/api/0.6/changesets?user=' + user.id
+             }, wrapcb(this, done, _connectionID));
+           }
 
-                 for (var _i2 = 0, _iMax2 = _newEventsFromSplit2.length; _i2 < _iMax2; _i2++) {
-                   newEvents.push(_newEventsFromSplit2[_i2]);
-                 }
-               }
+           function done(err, xml) {
+             if (err) {
+               return callback(err);
+             }
 
-               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);
+             _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 (inter !== null) {
-                   if (!prevSeg.isAnEndpoint(inter)) {
-                     var _newEventsFromSplit3 = this._splitSafely(prevSeg, inter);
+           function done(err, xml) {
+             if (err) {
+               // the status is null if no response could be retrieved
+               return callback(err, null);
+             } // update blocklists
 
-                     for (var _i3 = 0, _iMax3 = _newEventsFromSplit3.length; _i3 < _iMax3; _i3++) {
-                       newEvents.push(_newEventsFromSplit3[_i3]);
-                     }
-                   }
 
-                   if (!nextSeg.isAnEndpoint(inter)) {
-                     var _newEventsFromSplit4 = this._splitSafely(nextSeg, inter);
+             var elements = xml.getElementsByTagName('blacklist');
+             var regexes = [];
 
-                     for (var _i4 = 0, _iMax4 = _newEventsFromSplit4.length; _i4 < _iMax4; _i4++) {
-                       newEvents.push(_newEventsFromSplit4[_i4]);
-                     }
-                   }
+             for (var i = 0; i < elements.length; i++) {
+               var regexString = elements[i].getAttribute('regex'); // needs unencode?
+
+               if (regexString) {
+                 try {
+                   var regex = new RegExp(regexString);
+                   regexes.push(regex);
+                 } catch (e) {
+                   /* noop */
                  }
                }
+             }
 
-               this.tree.remove(segment);
+             if (regexes.length) {
+               _imageryBlocklists = regexes;
              }
 
-             return newEvents;
+             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);
+             }
            }
-           /* 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;
+         },
+         // 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 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;
+           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
 
-       var Operation = /*#__PURE__*/function () {
-         function Operation() {
-           _classCallCheck$1(this, Operation);
-         }
+           var tiles = tiler$2.zoomExtent([_tileZoom, _tileZoom]).getTiles(projection); // abort inflight requests that are no longer needed
 
-         _createClass$1(Operation, [{
-           key: "run",
-           value: function run(type, geom, moreGeoms) {
-             operation.type = type;
-             rounder.reset();
-             /* Convert inputs to MultiPoly objects */
+           var hadRequests = hasInflightRequests(_tileCache);
+           abortUnwantedRequests(_tileCache, tiles);
 
-             var multipolys = [new MultiPolyIn(geom, true)];
+           if (hadRequests && !hasInflightRequests(_tileCache)) {
+             dispatch$2.call('loaded'); // stop the spinner
+           } // issue new requests..
 
-             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. */
+           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 (operation.type === 'difference') {
-               // in place removal
-               var subject = multipolys[0];
-               var _i = 1;
+           if (!hasInflightRequests(_tileCache)) {
+             dispatch$2.call('loading'); // start the spinner
+           }
 
-               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. */
+           var path = '/api/0.6/map.json?bbox=';
+           var options = {
+             skipSeen: true
+           };
+           _tileCache.inflight[tile.id] = this.loadFromAPI(path + tile.extent.toParam(), tileCallback, options);
 
+           function tileCallback(err, parsed) {
+             delete _tileCache.inflight[tile.id];
 
-             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];
+             if (!err) {
+               delete _tileCache.toLoad[tile.id];
+               _tileCache.loaded[tile.id] = true;
+               var bbox = tile.extent.bbox();
+               bbox.id = tile.id;
 
-                 for (var j = _i2 + 1, jMax = multipolys.length; j < jMax; j++) {
-                   if (getBboxOverlap(mpA.bbox, multipolys[j].bbox) === null) return [];
-                 }
-               }
+               _tileCache.rtree.insert(bbox);
              }
-             /* Put segment endpoints in a priority queue */
 
-
-             var queue = new Tree(SweepEvent$1.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.');
-                 }
-               }
+             if (callback) {
+               callback(err, Object.assign({
+                 data: parsed
+               }, tile));
              }
-             /* Pass the sweep line over those endpoints */
 
+             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=';
 
-             var sweepLine = new SweepLine(queue);
-             var prevQueueSize = queue.size;
-             var node = queue.pop();
-
-             while (node) {
-               var evt = node.key;
+           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 (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.');
-               }
+           var tiles = tiler$2.zoomExtent([_noteZoom, _noteZoom]).getTiles(projection); // abort inflight requests that are no longer needed
 
-               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.');
-               }
+           abortUnwantedRequests(_noteCache, tiles); // issue new requests..
 
-               var newEvents = sweepLine.process(evt);
+           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];
 
-               for (var _i4 = 0, _iMax3 = newEvents.length; _i4 < _iMax3; _i4++) {
-                 var _evt = newEvents[_i4];
-                 if (_evt.consumedBy === undefined) queue.insert(_evt);
+               if (!err) {
+                 _noteCache.loaded[tile.id] = true;
                }
 
-               prevQueueSize = queue.size;
-               node = queue.pop();
-             } // free some memory we don't need anymore
+               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 (_noteCache.inflightPost[note.id]) {
+             return callback({
+               message: 'Note update already inflight',
+               status: -2
+             }, note);
+           }
 
-             rounder.reset();
-             /* Collect and compile segments we're keeping into a multipolygon */
+           if (!note.loc[0] || !note.loc[1] || !note.newComment) return; // location & description required
 
-             var ringsOut = RingOut.factory(sweepLine.segments);
-             var result = new MultiPolyOut(ringsOut);
-             return result.getGeom();
+           var comment = note.newComment;
+
+           if (note.newCategory && note.newCategory !== 'None') {
+             comment += ' #' + note.newCategory;
            }
-         }]);
 
-         return Operation;
-       }(); // singleton available by import
+           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));
 
+           function done(err, xml) {
+             delete _noteCache.inflightPost[note.id];
 
-       var operation = new Operation();
+             if (err) {
+               return callback(err);
+             } // we get the updated note back, remove from caches and reparse..
 
-       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);
-       };
+             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);
+           }
 
-       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 (_noteCache.inflightPost[note.id]) {
+             return callback({
+               message: 'Note update already inflight',
+               status: -2
+             }, note);
+           }
 
-         return operation.run('intersection', geom, moreGeoms);
-       };
+           var action;
 
-       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 (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
+           }
 
-         return operation.run('xor', geom, moreGeoms);
-       };
+           var path = '/api/0.6/notes/' + note.id + '/' + action;
 
-       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];
-         }
+           if (note.newComment) {
+             path += '?' + utilQsString({
+               text: note.newComment
+             });
+           }
 
-         return operation.run('difference', subjectGeom, clippingGeoms);
-       };
+           _noteCache.inflightPost[note.id] = oauth.xhr({
+             method: 'POST',
+             path: path
+           }, wrapcb(this, done, _connectionID));
 
-       var index$1 = {
-         union: union$1,
-         intersection: intersection$1$1,
-         xor: xor,
-         difference: difference
-       };
+           function done(err, xml) {
+             delete _noteCache.inflightPost[note.id];
 
-       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 (err) {
+               return callback(err);
+             } // we get the updated note back, remove from caches and reparse..
 
-             function multi(l) {
-               return l.map(point);
-             }
 
-             function poly(p) {
-               return p.map(multi);
-             }
+             this.removeNote(note); // update closed note cache - used to populate `closed:note` changeset tag
 
-             function multiPoly(m) {
-               return m.map(poly);
+             if (action === 'close') {
+               _noteCache.closed[note.id] = true;
+             } else if (action === 'reopen') {
+               delete _noteCache.closed[note.id];
              }
 
-             function geometry(obj) {
-               if (!obj) {
-                 return {};
+             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
 
-               switch (obj.type) {
-                 case "Point":
-                   obj.coordinates = point(obj.coordinates);
-                   return obj;
+           dispatch$2.call('change');
+           return this;
+         },
+         toggle: function toggle(val) {
+           _off = !val;
+           return this;
+         },
+         isChangesetInflight: function isChangesetInflight() {
+           return !!_changeset.inflight;
+         },
+         // get/set cached data
+         // This is used to save/restore the state when entering/exiting the walkthrough
+         // Also used for testing purposes.
+         caches: function caches(obj) {
+           function cloneCache(source) {
+             var target = {};
+             Object.keys(source).forEach(function (k) {
+               if (k === 'rtree') {
+                 target.rtree = new RBush().fromJSON(source.rtree.toJSON()); // clone rbush
+               } else if (k === 'note') {
+                 target.note = {};
+                 Object.keys(source.note).forEach(function (id) {
+                   target.note[id] = osmNote(source.note[id]); // copy notes
+                 });
+               } else {
+                 target[k] = JSON.parse(JSON.stringify(source[k])); // clone deep
+               }
+             });
+             return target;
+           }
 
-                 case "LineString":
-                 case "MultiPoint":
-                   obj.coordinates = multi(obj.coordinates);
-                   return obj;
+           if (!arguments.length) {
+             return {
+               tile: cloneCache(_tileCache),
+               note: cloneCache(_noteCache),
+               user: cloneCache(_userCache)
+             };
+           } // access caches directly for testing (e.g., loading notes rtree)
 
-                 case "Polygon":
-                 case "MultiLineString":
-                   obj.coordinates = poly(obj.coordinates);
-                   return obj;
 
-                 case "MultiPolygon":
-                   obj.coordinates = multiPoly(obj.coordinates);
-                   return obj;
+           if (obj === 'get') {
+             return {
+               tile: _tileCache,
+               note: _noteCache,
+               user: _userCache
+             };
+           }
 
-                 case "GeometryCollection":
-                   obj.geometries = obj.geometries.map(geometry);
-                   return obj;
+           if (obj.tile) {
+             _tileCache = obj.tile;
+             _tileCache.inflight = {};
+           }
 
-                 default:
-                   return {};
-               }
-             }
+           if (obj.note) {
+             _noteCache = obj.note;
+             _noteCache.inflight = {};
+             _noteCache.inflightPost = {};
+           }
 
-             function feature(obj) {
-               obj.geometry = geometry(obj.geometry);
-               return obj;
-             }
+           if (obj.user) {
+             _userCache = obj.user;
+           }
 
-             function featureCollection(f) {
-               f.features = f.features.map(feature);
-               return f;
-             }
+           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;
 
-             function geometryCollection(g) {
-               g.geometries = g.geometries.map(geometry);
-               return g;
+           function done(err, res) {
+             if (err) {
+               if (callback) callback(err);
+               return;
              }
 
-             if (!t) {
-               return t;
+             if (that.getConnectionId() !== cid) {
+               if (callback) callback({
+                 message: 'Connection Switched',
+                 status: -1
+               });
+               return;
              }
 
-             switch (t.type) {
-               case "Feature":
-                 return feature(t);
-
-               case "GeometryCollection":
-                 return geometryCollection(t);
+             _rateLimitError = undefined;
+             dispatch$2.call('change');
+             if (callback) callback(err, res);
+             that.userChangesets(function () {}); // eagerly load user details/changesets
+           }
 
-               case "FeatureCollection":
-                 return featureCollection(t);
+           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
 
-               case "Point":
-               case "LineString":
-               case "Polygon":
-               case "MultiPoint":
-               case "MultiPolygon":
-               case "MultiLineString":
-                 return geometry(t);
+           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();
+         }
+       };
 
-               default:
-                 return t;
-             }
-           }
+       var _apibase$1 = 'https://wiki.openstreetmap.org/w/api.php';
+       var _inflight$1 = {};
+       var _wikibaseCache = {};
+       var _localeIDs = {
+         en: false
+       };
 
-           module.exports = parse;
-           module.exports.parse = parse;
-         })();
+       var debouncedRequest$1 = debounce(request$1, 500, {
+         leading: false
        });
 
-       function isObject$4(obj) {
-         return _typeof(obj) === 'object' && obj !== null;
+       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);
+         });
        }
 
-       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);
+       var serviceOsmWikibase = {
+         init: function init() {
+           _inflight$1 = {};
+           _wikibaseCache = {};
+           _localeIDs = {};
+         },
+         reset: function reset() {
+           Object.values(_inflight$1).forEach(function (controller) {
+             controller.abort();
            });
-         }
-       }
-
-       function getTreeDepth(obj) {
-         var depth = 0;
+           _inflight$1 = {};
+         },
 
-         if (Array.isArray(obj) || isObject$4(obj)) {
-           forEach(obj, function (val) {
-             if (Array.isArray(val) || isObject$4(val)) {
-               var tmpDepth = getTreeDepth(val);
+         /**
+          * 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 (tmpDepth > depth) {
-                 depth = tmpDepth;
-               }
+             if (locale && stmt.qualifiers && stmt.qualifiers.P26 && stmt.qualifiers.P26[0].datavalue.value.id === locale) {
+               localePick = stmt;
              }
            });
-           return depth + 1;
-         }
-
-         return depth;
-       }
-
-       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();
-           }
-
-           var string = JSON.stringify(obj);
+           var result = localePick || preferredPick;
 
-           if (string === undefined) {
-             return string;
+           if (result) {
+             var datavalue = result.mainsnak.datavalue;
+             return datavalue.type === 'wikibase-entityid' ? datavalue.value.id : datavalue.value;
+           } else {
+             return undefined;
            }
+         },
 
-           var length = maxLength - currentIndent.length - reserved;
-           var treeDepth = getTreeDepth(obj);
+         /**
+          * Convert monolingual property into a key-value object (language -> value)
+          * @param entity object from wikibase
+          * @param property string e.g. 'P31' for monolingual wiki page title
+          */
+         monolingualClaimToValueObj: function monolingualClaimToValueObj(entity, property) {
+           if (!entity || !entity.claims[property]) return undefined;
+           return entity.claims[property].reduce(function (acc, obj) {
+             var value = obj.mainsnak.datavalue.value;
+             acc[value.language] = value.text;
+             return acc;
+           }, {});
+         },
+         toSitelink: function toSitelink(key, value) {
+           var result = value ? 'Tag:' + key + '=' + value : 'Key:' + key;
+           return result.replace(/_/g, ' ').trim();
+         },
+         //
+         // Pass params object of the form:
+         // {
+         //   key: 'string',
+         //   value: 'string',
+         //   langCode: 'string'
+         // }
+         //
+         getEntity: function getEntity(params, callback) {
+           var doRequest = params.debounce ? debouncedRequest$1 : request$1;
+           var that = this;
+           var titles = [];
+           var result = {};
+           var rtypeSitelink = params.key === 'type' && params.value ? ('Relation:' + params.value).replace(/_/g, ' ').trim() : false;
+           var keySitelink = params.key ? this.toSitelink(params.key) : false;
+           var tagSitelink = params.key && params.value ? this.toSitelink(params.key, params.value) : false;
+           var localeSitelink;
 
-           if (treeDepth <= maxNesting && string.length <= length) {
-             var prettified = prettify(string, {
-               addMargin: addMargin,
-               addArrayMargin: addArrayMargin,
-               addObjectMargin: addObjectMargin
+           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);
+               }
              });
-
-             if (prettified.length <= length) {
-               return prettified;
-             }
            }
 
-           if (isObject$4(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 = '[]';
+           if (rtypeSitelink) {
+             if (_wikibaseCache[rtypeSitelink]) {
+               result.rtype = _wikibaseCache[rtypeSitelink];
              } 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 = '{}';
+               titles.push(rtypeSitelink);
              }
+           }
 
-             if (items.length > 0) {
-               return [delimiters[0], indent + items.join(',\n' + nextIndent), delimiters[1]].join('\n' + currentIndent);
+           if (keySitelink) {
+             if (_wikibaseCache[keySitelink]) {
+               result.key = _wikibaseCache[keySitelink];
+             } else {
+               titles.push(keySitelink);
              }
            }
 
-           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;
+           if (tagSitelink) {
+             if (_wikibaseCache[tagSitelink]) {
+               result.tag = _wikibaseCache[tagSitelink];
+             } else {
+               titles.push(tagSitelink);
+             }
+           }
 
-       function prettify(string, options) {
-         options = options || {};
-         var tokens = {
-           '{': '{',
-           '}': '}',
-           '[': '[',
-           ']': ']',
-           ',': ', ',
-           ':': ': '
-         };
+           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"}}
 
-         if (options.addMargin || options.addObjectMargin) {
-           tokens['{'] = '{ ';
-           tokens['}'] = ' }';
-         }
 
-         if (options.addMargin || options.addArrayMargin) {
-           tokens['['] = '[ ';
-           tokens[']'] = ' ]';
-         }
+           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,
 
-         return string.replace(stringOrChar, function (match, string) {
-           return string ? match : tokens[match];
-         });
-       }
+           };
+           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;
 
-       function get$5(options, name, defaultValue) {
-         return name in options ? options[name] : defaultValue;
-       }
+                   if (title === rtypeSitelink) {
+                     _wikibaseCache[rtypeSitelink] = res;
+                     result.rtype = res;
+                   } else if (title === keySitelink) {
+                     _wikibaseCache[keySitelink] = res;
+                     result.key = res;
+                   } else if (title === tagSitelink) {
+                     _wikibaseCache[tagSitelink] = res;
+                     result.tag = res;
+                   } else if (title === localeSitelink) {
+                     localeID = res.id;
+                   } else {
+                     console.log('Unexpected title ' + title); // eslint-disable-line no-console
+                   }
+                 }
+               });
 
-       var jsonStringifyPrettyCompact = stringify;
+               if (localeSitelink) {
+                 // If locale ID is not found, store false to prevent repeated queries
+                 that.addLocale(params.langCodes[0], localeID);
+               }
 
-       var _default$3 = /*#__PURE__*/function () {
-         // constructor
-         //
-         // `fc`  Optional FeatureCollection of known features
+               callback(null, result);
+             }
+           });
+         },
          //
-         // 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`
+         // Pass params object of the form:
+         // {
+         //   key: 'string',     // required
+         //   value: 'string'    // optional
+         // }
          //
+         // Get an result object used to display tag documentation
          // {
-         //   "type": "FeatureCollection"
-         //   "features": [
-         //     {
-         //       "type": "Feature",
-         //       "id": "philly_metro.geojson",
-         //       "properties": { … },
-         //       "geometry": { … }
-         //     }
-         //   ]
+         //   title:        'string',
+         //   description:  'string',
+         //   editURL:      'string',
+         //   imageURL:     'string',
+         //   wiki:         { title: 'string', text: 'string', url: 'string' }
          // }
-         function _default(fc) {
-           var _this = this;
+         //
+         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;
+             }
 
-           _classCallCheck(this, _default);
+             var entity = data.rtype || data.tag || data.key;
 
-           // 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 (!entity) {
+               callback('No entity');
+               return;
+             }
 
-           this._strict = true; // process input FeatureCollection
+             var i;
+             var description;
 
-           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`
+             for (i in langCodes) {
+               var _code = langCodes[i];
 
-               var id = feature.id || props.id;
-               if (!id || !/^\S+\.geojson$/i.test(id)) return; // ensure `id` exists and is lowercase
+               if (entity.descriptions[_code] && entity.descriptions[_code].language === _code) {
+                 description = entity.descriptions[_code];
+                 break;
+               }
+             }
 
-               id = id.toLowerCase();
-               feature.id = id;
-               props.id = id; // ensure `area` property exists
+             if (!description && Object.values(entity.descriptions).length) description = Object.values(entity.descriptions)[0]; // prepare result
 
-               if (!props.area) {
-                 var area = geojsonArea.geometry(feature.geometry) / 1e6; // m² to km²
+             var result = {
+               title: entity.title,
+               description: description ? description.value : '',
+               descriptionLocaleCode: description ? description.language : '',
+               editURL: 'https://wiki.openstreetmap.org/wiki/' + entity.title
+             }; // add image
 
-                 props.area = Number(area.toFixed(2));
-               }
+             if (entity.claims) {
+               var imageroot;
+               var image = that.claimToValue(entity, 'P4', langCodes[0]);
 
-               _this._cache[id] = feature;
-             });
-           } // Replace CountryCoder world geometry to be a polygon covering the world.
+               if (image) {
+                 imageroot = 'https://commons.wikimedia.org/w/index.php';
+               } else {
+                 image = that.claimToValue(entity, 'P28', langCodes[0]);
 
+                 if (image) {
+                   imageroot = 'https://wiki.openstreetmap.org/w/index.php';
+                 }
+               }
 
-           var world = _cloneDeep(feature('Q2'));
+               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.
 
-           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
-         //
+             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];
 
+             for (i in wikis) {
+               var wiki = wikis[i];
 
-         _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();
+               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);
 
-               if (this._cache[_id]) {
-                 return {
-                   type: 'geojson',
-                   location: location,
-                   id: _id
-                 };
+                 if (info) {
+                   result.wiki = info;
+                   break;
+                 }
                }
-             } else if (typeof location === 'string' || typeof location === 'number') {
-               // a country-coder value?
-               var feature$1 = feature(location);
 
-               if (feature$1) {
-                 // Use wikidata QID as the identifier, since that seems to be the one
-                 // property that everything in CountryCoder is guaranteed to have.
-                 var _id2 = feature$1.properties.wikidata;
+               if (result.wiki) break;
+             }
+
+             callback(null, result); // Helper method to get wiki info if a given language exists
+
+             function getWikiInfo(wiki, langCode, tKey) {
+               if (wiki && wiki[langCode]) {
                  return {
-                   type: 'countrycoder',
-                   location: location,
-                   id: _id2
+                   title: wiki[langCode],
+                   text: tKey,
+                   url: 'https://wiki.openstreetmap.org/wiki/' + wiki[langCode]
                  };
                }
              }
+           });
+         },
+         addLocale: function addLocale(langCode, qid) {
+           // Makes it easier to unit test
+           _localeIDs[langCode] = qid;
+         },
+         apibase: function apibase(val) {
+           if (!arguments.length) return _apibase$1;
+           _apibase$1 = val;
+           return this;
+         }
+       };
 
-             if (this._strict) {
-               throw new Error("validateLocation:  Invalid location: \"".concat(location, "\"."));
-             } else {
-               return null;
+       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);
+
+             request.abort = function () {
+               window.clearTimeout(t);
+             };
+           }
+
+           return request;
+         }
+
+         function rand() {
+           var chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
+           var c = '';
+           var i = -1;
+
+           while (++i < 15) {
+             c += chars.charAt(Math.floor(Math.random() * 52));
+           }
+
+           return c;
+         }
+
+         function create(url) {
+           var e = url.match(/callback=(\w+)/);
+           var c = e ? e[1] : rand();
+
+           jsonpCache[c] = function (data) {
+             if (jsonpCache[c]) {
+               callback(data);
              }
-           } // 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
+             finalize();
+           };
 
-             if (this._cache[id]) {
-               return Object.assign(valid, {
-                 feature: this._cache[id]
-               });
-             } // a [lon,lat] coordinate pair?
+           function finalize() {
+             delete jsonpCache[c];
+             script.remove();
+           }
 
+           request.abort = finalize;
+           return 'jsonpCache.' + c;
+         }
 
-             if (valid.type === 'point') {
-               var RADIUS = 25000; // meters
+         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 EDGES = 10;
-               var PRECISION = 3;
-               var area = Math.PI * RADIUS * RADIUS / 1e6; // m² to km²
+       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
 
-               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));
+       var maxHfov = 90; // zoom out degrees
 
-               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.
+       var defaultHfov = 45;
+       var _hires = false;
+       var _resolution = 512; // higher numbers are slower - 512, 1024, 2048, 4096
 
-               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
+       var _currScene = 0;
 
+       var _ssCache;
 
-               if (!props.area) {
-                 var _area = geojsonArea.geometry(_feature.geometry) / 1e6; // m² to km²
+       var _pannellumViewer;
 
+       var _sceneOptions = {
+         showFullscreenCtrl: false,
+         autoLoad: true,
+         compass: true,
+         yaw: 0,
+         minHfov: minHfov,
+         maxHfov: maxHfov,
+         hfov: defaultHfov,
+         type: 'cubemap',
+         cubeMap: []
+       };
 
-                 props.area = Number(_area.toFixed(2));
-               } // ensure `id` property exists
+       var _loadViewerPromise;
+       /**
+        * abortRequest().
+        */
 
 
-               _feature.id = id;
-               props.id = id;
-               this._cache[id] = _feature;
-               return Object.assign(valid, {
-                 feature: _feature
-               });
-             }
+       function abortRequest$1(i) {
+         i.abort();
+       }
+       /**
+        * localeTimeStamp().
+        */
 
-             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);
+       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.
+        */
 
-             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
 
+       function loadTiles(which, url, projection, margin) {
+         var tiles = tiler$1.margin(margin).getTiles(projection); // abort inflight requests that are no longer needed
+
+         var cache = _ssCache[which];
+         Object.keys(cache.inflight).forEach(function (k) {
+           var wanted = tiles.find(function (tile) {
+             return k.indexOf(tile.id + ',') === 0;
+           });
+
+           if (!wanted) {
+             abortRequest$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.
+        */
+
+
+       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
+
+           bubbles.shift();
+           var features = bubbles.map(function (bubble) {
+             if (cache.points[bubble.id]) return null; // skip duplicates
 
-             include.sort(_sortLocations);
-             var id = '+[' + include.map(function (d) {
-               return d.id;
-             }).join(',') + ']';
+             var loc = [bubble.lo, bubble.la];
+             var d = {
+               loc: loc,
+               key: bubble.id,
+               ca: bubble.he,
+               captured_at: bubble.cd,
+               captured_by: 'microsoft',
+               // nbn: bubble.nbn,
+               // pbn: bubble.pbn,
+               // ad: bubble.ad,
+               // rn: bubble.rn,
+               pr: bubble.pr,
+               // previous
+               ne: bubble.ne,
+               // next
+               pano: true,
+               sequenceKey: null
+             };
+             cache.points[bubble.id] = d; // a sequence starts here
 
-             if (exclude.length) {
-               exclude.sort(_sortLocations);
-               id += '-[' + exclude.map(function (d) {
-                 return d.id;
-               }).join(',') + ']';
+             if (bubble.pr === undefined) {
+               cache.leaders.push(bubble.id);
              }
 
              return {
-               type: 'locationset',
-               locationSet: locationSet,
-               id: id
+               minX: loc[0],
+               minY: loc[1],
+               maxX: loc[0],
+               maxY: loc[1],
+               data: d
              };
-           } // 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]
-               });
-             }
+           }).filter(Boolean);
+           cache.rtree.load(features);
+           connectSequences();
 
-             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 (which === 'bubbles') {
+             dispatch$1.call('loadedImages');
+           }
+         });
+       } // call this sometimes to connect the bubbles into sequences
 
-             if (include.length === 1 && exclude.length === 0) {
-               return Object.assign(valid, {
-                 feature: include[0].feature
-               });
-             } // calculate unions
 
+       function connectSequences() {
+         var cache = _ssCache.bubbles;
+         var keepLeaders = [];
 
-             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 = 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.
 
-             var resultGeoJSON = excludeGeoJSON ? _clip(includeGeoJSON, excludeGeoJSON, 'DIFFERENCE') : includeGeoJSON;
-             var area = geojsonArea.geometry(resultGeoJSON.geometry) / 1e6; // m² to km²
+           var sequence = {
+             key: bubble.key,
+             bubbles: []
+           };
+           var complete = false;
 
-             resultGeoJSON.id = id;
-             resultGeoJSON.properties = {
-               id: id,
-               area: Number(area.toFixed(2))
-             };
-             this._cache[id] = resultGeoJSON;
-             return Object.assign(valid, {
-               feature: resultGeoJSON
-             });
-           } // strict
-           //
+           do {
+             sequence.bubbles.push(bubble);
+             seen[bubble.key] = true;
 
-         }, {
-           key: "strict",
-           value: function strict(val) {
-             if (val === undefined) {
-               // get
-               return this._strict;
+             if (bubble.ne === undefined) {
+               complete = true;
              } else {
-               // set
-               this._strict = val;
-               return this;
+               bubble = cache.points[bubble.ne]; // advance to next
              }
-           } // cache
-           // convenience method to access the internal cache
+           } while (bubble && !seen[bubble.key] && !complete);
 
-         }, {
-           key: "cache",
-           value: function cache() {
-             return this._cache;
-           } // stringify
-           // convenience method to prettyStringify the given object
+           if (complete) {
+             _ssCache.sequences[sequence.key] = sequence; // assign bubbles to the sequence
 
-         }, {
-           key: "stringify",
-           value: function stringify(obj, options) {
-             return jsonStringifyPrettyCompact(obj, options);
-           }
-         }]);
+             for (var j = 0; j < sequence.bubbles.length; j++) {
+               sequence.bubbles[j].sequenceKey = sequence.key;
+             } // create a GeoJSON LineString
 
-         return _default;
-       }(); // Wrap the mfogel/polygon-clipping library and return a GeoJSON feature.
 
-       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
+             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]);
            }
-         }; // 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
+         } // couldn't complete these, save for later
 
 
-       function _locationReducer(accumulator, location) {
-         /* eslint-disable no-console, no-invalid-this */
-         var result;
+         cache.leaders = keepLeaders;
+       }
+       /**
+        * getBubbles() handles the request to the server for a tile extent of 'bubbles' (streetside image locations).
+        */
 
-         try {
-           var resolved = this.resolveLocation(location);
 
-           if (!resolved || !resolved.feature) {
-             console.warn("Warning:  Couldn't resolve location \"".concat(location, "\""));
-             return accumulator;
+       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
 
-           result = !accumulator ? resolved.feature : _clip(accumulator, resolved.feature, 'UNION');
-         } catch (e) {
-           console.warn("Warning:  Error resolving location \"".concat(location, "\""));
-           console.warn(e);
-           result = accumulator;
-         }
 
-         return result;
-         /* eslint-enable no-console, no-invalid-this */
-       }
+       function partitionViewport(projection) {
+         var z = geoScaleToZoom(projection.scale());
+         var z2 = Math.ceil(z * 2) / 2 + 2.5; // round to next 0.5 and add 2.5
 
-       function _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 tiler = utilTiler().zoomExtent([z2, z2]);
+         return tiler.getTiles(projection).map(function (tile) {
+           return tile.extent;
+         });
+       } // no more than `limit` results per partition.
 
 
-       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);
+       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()
+        */
 
-       var _oci = null;
-       function uiSuccess(context) {
-         var MAXEVENTS = 2;
-         var dispatch$1 = dispatch('cancel');
-
-         var _changeset;
 
-         var _location;
+       function loadImage(imgInfo) {
+         return new Promise(function (resolve) {
+           var img = new Image();
 
-         ensureOSMCommunityIndex(); // start fetching the data
+           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'
+             });
+           };
 
-         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];
+           img.onerror = function () {
+             resolve({
+               data: imgInfo,
+               status: 'error'
+             });
+           };
 
-               if (!ociFeature) {
-                 ociFeature = JSON.parse(JSON.stringify(feature)); // deep clone
+           img.setAttribute('crossorigin', '');
+           img.src = imgInfo.url;
+         });
+       }
+       /**
+        * loadCanvas()
+        */
 
-                 ociFeature.properties.resourceIDs = new Set();
-                 ociFeatures[feature.id] = ociFeature;
-               }
 
-               ociFeature.properties.resourceIDs.add(resource.id);
-             });
-             return _oci = {
-               features: ociFeatures,
-               resources: ociResources,
-               query: whichPolygon_1({
-                 type: 'FeatureCollection',
-                 features: Object.values(ociFeatures)
-               })
-             };
-           });
-         } // string-to-date parsing in JavaScript is weird
+       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()
+        */
 
 
-         function parseEventDate(when) {
-           if (!when) return;
-           var raw = when.trim();
-           if (!raw) return;
+       function loadFaces(faceGroup) {
+         return Promise.all(faceGroup.map(loadCanvas)).then(function () {
+           return {
+             status: 'loadFaces done'
+           };
+         });
+       }
 
-           if (!/Z$/.test(raw)) {
-             // if no trailing 'Z', add one
-             raw += 'Z'; // this forces date to be parsed as a UTC date
-           }
+       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 parsed = new Date(raw);
-           return new Date(parsed.toUTCString().substr(0, 25)); // convert to local timezone
-         }
 
-         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..
+         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);
+       }
 
-           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
+       function qkToXY(qk) {
+         var x = 0;
+         var y = 0;
+         var scale = 256;
 
-             communities.sort(function (a, b) {
-               return a.area - b.area || b.order - a.order;
-             });
-             body.call(showCommunityLinks, communities.map(function (c) {
-               return c.resource;
-             }));
-           });
+         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;
          }
 
-         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'));
-         }
+         return [x, y];
+       }
 
-         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);
+       function getQuadKeys() {
+         var dim = _resolution / 256;
+         var quadKeys;
 
-           if (d.type === 'reddit') {
-             // linkify subreddits  #4997
-             descriptionHTML = descriptionHTML.replace(/(\/r\/\w*\/*)/i, function (match) {
-               return linkify(d.url, match);
-             });
-           }
+         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'];
+         }
 
-           selection.append('div').attr('class', 'community-description').html(descriptionHTML);
+         return quadKeys;
+       }
 
-           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));
+       var serviceStreetside = {
+         /**
+          * init() initialize streetside.
+          */
+         init: function init() {
+           if (!_ssCache) {
+             this.reset();
            }
 
-           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
+           this.event = utilRebind(this, dispatch$1, 'on');
+         },
 
-           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);
+         /**
+          * reset() reset the cache.
+          */
+         reset: function reset() {
+           if (_ssCache) {
+             Object.values(_ssCache.bubbles.inflight).forEach(abortRequest$1);
            }
 
-           function showMore(selection) {
-             var more = selection.selectAll('.community-more').data([0]);
-             var moreEnter = more.enter().append('div').attr('class', 'community-more');
+           _ssCache = {
+             bubbles: {
+               inflight: {},
+               loaded: {},
+               nextPage: {},
+               rtree: new RBush(),
+               points: {},
+               leaders: []
+             },
+             sequences: {}
+           };
+         },
 
-             if (d.extendedDescription) {
-               moreEnter.append('div').attr('class', 'community-extended-description').html(_t.html("community.".concat(d.id, ".extendedDescription"), replacements));
-             }
+         /**
+          * 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
 
-             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
-               }));
+           _ssCache.bubbles.rtree.search(bbox).forEach(function (d) {
+             var key = d.data.sequenceKey;
+
+             if (key && !seen[key]) {
+               seen[key] = true;
+               results.push(_ssCache.sequences[key].geojson);
              }
-           }
+           });
 
-           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;
+           return results;
+         },
 
-               if (d.i18n && d.id) {
-                 name = _t("community.".concat(communityID, ".events.").concat(d.id, ".name"), {
-                   "default": name
-                 });
-               }
+         /**
+          * 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;
 
-               return name;
-             });
-             itemEnter.append('div').attr('class', 'community-event-when').html(function (d) {
-               var options = {
-                 weekday: 'short',
-                 day: 'numeric',
-                 month: 'short',
-                 year: 'numeric'
-               };
+           var sceneID = _currScene.toString();
 
-               if (d.date.getHours() || d.date.getMinutes()) {
-                 // include time if it has one
-                 options.hour = 'numeric';
-                 options.minute = 'numeric';
-               }
+           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 d.date.toLocaleString(_mainLocalizer.localeCode(), options);
-             });
-             itemEnter.append('div').attr('class', 'community-event-where').html(function (d) {
-               var where = d.where;
+           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 (d.i18n && d.id) {
-                 where = _t("community.".concat(communityID, ".events.").concat(d.id, ".where"), {
-                   "default": where
-                 });
-               }
+           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
 
-               return where;
-             });
-             itemEnter.append('div').attr('class', 'community-event-description').html(function (d) {
-               var description = d.description;
+           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.
 
-               if (d.i18n && d.id) {
-                 description = _t("community.".concat(communityID, ".events.").concat(d.id, ".description"), {
-                   "default": description
-                 });
-               }
+             var t = timer(function (elapsed) {
+               dispatch$1.call('viewerChanged');
 
-               return description;
+               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
 
-           function linkify(url, text) {
-             text = text || url;
-             return "<a target=\"_blank\" href=\"".concat(url, "\">").concat(text, "</a>");
-           }
-         }
+           wrap = wrap.merge(wrapEnter).call(setupCanvas, true); // Register viewer resize handler
 
-         success.changeset = function (val) {
-           if (!arguments.length) return _changeset;
-           _changeset = val;
-           return success;
-         };
+           context.ui().photoviewer.on('resize.streetside', function () {
+             if (_pannellumViewer) {
+               _pannellumViewer.resize();
+             }
+           });
+           _loadViewerPromise = new Promise(function (resolve, reject) {
+             var loadedCount = 0;
 
-         success.location = function (val) {
-           if (!arguments.length) return _location;
-           _location = val;
-           return success;
-         };
+             function loaded() {
+               loadedCount += 1; // wait until both files are loaded
 
-         return utilRebind(success, dispatch$1, 'on');
-       }
+               if (loadedCount === 2) resolve();
+             }
 
-       function modeSave(context) {
-         var mode = {
-           id: 'save'
-         };
-         var keybinding = utilKeybinding('modeSave');
-         var commit = uiCommit(context).on('cancel', cancel);
+             var head = select('head'); // load streetside pannellum viewer css
 
-         var _conflictsUi; // uiConflicts
+             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 = null;
+           });
+           return _loadViewerPromise;
 
-         var _location;
+           function step(stepBy) {
+             return function () {
+               var viewer = context.container().select('.photoviewer');
+               var selected = viewer.empty() ? undefined : viewer.datum();
+               if (!selected) return;
+               var nextID = stepBy === 1 ? selected.ne : selected.pr;
 
-         var _success;
+               var yaw = _pannellumViewer.getYaw();
 
-         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);
+               var ca = selected.ca + yaw;
+               var origin = selected.loc; // construct a search trapezoid pointing out from current bubble
 
-         function cancel() {
-           context.enter(modeBrowse(context));
-         }
+               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 showProgress(num, total) {
-           var modal = context.container().select('.loading-modal .modal-section');
-           var progress = modal.selectAll('.progress').data([0]); // enter/update
+               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
 
-           progress.enter().append('div').attr('class', 'progress').merge(progress).text(_t('save.conflict_progress', {
-             num: num,
-             total: total
-           }));
-         }
+               var minDist = Infinity;
 
-         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);
-         }
+               _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 showErrors(errors) {
-           keybindingOn();
-           var selection = uiConfirm(context.container());
-           selection.select('.modal-section.header').append('h3').text(_t('save.error'));
-           addErrors(selection, errors);
-           selection.okButton();
-         }
+                 if (minTheta > 20) {
+                   dist += 5; // penalize distance if camera angles don't match
+                 }
 
-         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();
-         }
+                 if (dist < minDist) {
+                   nextID = d.data.key;
+                   minDist = dist;
+                 }
+               });
 
-         function showSuccess(changeset) {
-           commit.reset();
+               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;
+         },
 
-           var ui = _success.changeset(changeset).location(_location).on('cancel', function () {
-             context.ui().sidebar.hide();
-           });
+         /**
+          * showViewer()
+          */
+         showViewer: function showViewer(context) {
+           var wrap = context.container().select('.photoviewer').classed('hide', false);
+           var isHidden = wrap.selectAll('.photo-wrapper.ms-wrapper.hide').size();
 
-           context.enter(modeBrowse(context).sidebar(ui));
-         }
+           if (isHidden) {
+             wrap.selectAll('.photo-wrapper:not(.ms-wrapper)').classed('hide', true);
+             wrap.selectAll('.photo-wrapper.ms-wrapper').classed('hide', false);
+           }
 
-         function keybindingOn() {
-           select(document).call(keybinding.on('⎋', cancel, true));
-         }
+           return this;
+         },
 
-         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."
+         /**
+          * hideViewer()
+          */
+         hideViewer: function hideViewer(context) {
+           var viewer = context.container().select('.photoviewer');
+           if (!viewer.empty()) viewer.datum(null);
+           viewer.classed('hide', true).selectAll('.photo-wrapper').classed('hide', true);
+           context.container().selectAll('.viewfield-group, .sequence, .icon-sign').classed('currentView', false);
+           this.updateUrlImage(null);
+           return this.setStyles(context, null, true);
+         },
 
+         /**
+          * selectImage().
+          */
+         selectImage: function selectImage(context, key) {
+           var that = this;
+           var d = this.cachedImage(key);
+           var viewer = context.container().select('.photoviewer');
+           if (!viewer.empty()) viewer.datum(d);
+           this.setStyles(context, null, true);
+           var wrap = context.container().select('.photoviewer .ms-wrapper');
+           var attribution = wrap.selectAll('.photo-attribution').html('');
+           wrap.selectAll('.pnlm-load-box') // display "loading.."
+           .style('display', 'block');
+           if (!d) return this;
+           this.updateUrlImage(key);
+           _sceneOptions.northOffset = d.ca;
+           var line1 = attribution.append('div').attr('class', 'attribution-row');
+           var hiresDomId = utilUniqueDomId('streetside-hires'); // Add hires checkbox
 
-         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
-             });
+           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
 
-         mode.selectedIDs = function () {
-           return _conflictsUi ? _conflictsUi.shownEntityIds() : [];
-         };
+           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('|');
+           }
 
-         mode.enter = function () {
-           // Show sidebar
-           context.ui().sidebar.expand();
+           if (d.captured_at) {
+             captureInfo.append('span').attr('class', 'captured_at').html(localeTimestamp(d.captured_at));
+           } // Add image links
 
-           function done() {
-             context.ui().sidebar.show(commit);
-           }
 
-           keybindingOn();
-           context.container().selectAll('.main-content').classed('active', false).classed('inactive', true);
-           var osm = context.connection();
+           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;
 
-           if (!osm) {
-             cancel();
-             return;
+           for (var i = 0; i < paddingNeeded; i++) {
+             bubbleIdQuadKey = '0' + bubbleIdQuadKey;
            }
 
-           if (osm.authenticated()) {
-             done();
-           } else {
-             osm.authenticate(function (err) {
-               if (err) {
-                 cancel();
-               } else {
-                 done();
-               }
-             });
-           }
-         };
+           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
 
-         mode.exit = function () {
-           keybindingOff();
-           context.container().selectAll('.main-content').classed('active', true).classed('inactive', false);
-           context.ui().sidebar.hide();
-         };
+           var faceKeys = ['01', '02', '03', '10', '11', '12']; // Map images to cube faces
 
-         return mode;
-       }
+           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 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'
-         })];
+               var sceneID = _currScene.toString();
 
-         function enabled() {
-           return osmEditable();
-         }
+               _pannellumViewer.addScene(sceneID, _sceneOptions).loadScene(sceneID); // remove previous scene
 
-         function osmEditable() {
-           return context.editable();
-         }
 
-         modes.forEach(function (mode) {
-           context.keybinding().on(mode.key, function () {
-             if (!enabled()) return;
+               if (_currScene > 2) {
+                 sceneID = (_currScene - 1).toString();
 
-             if (mode.id === context.mode().id) {
-               context.enter(modeBrowse(context));
-             } else {
-               context.enter(mode);
+                 _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);
+           }
 
-         tool.render = function (selection) {
-           var wrap = selection.append('div').attr('class', 'joined').style('display', 'flex');
+           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 debouncedUpdate = debounce(update, 500, {
-             leading: true,
-             trailing: true
+           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
 
-           context.map().on('move.modes', debouncedUpdate).on('drawn.modes', debouncedUpdate);
-           context.on('enter.modes', update);
-           update();
-
-           function update() {
-             var buttons = wrap.selectAll('button.add-button').data(modes, function (d) {
-               return d.id;
-             }); // exit
-
-             buttons.exit().remove(); // enter
-
-             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
+           context.container().selectAll('.layer-streetside-images .viewfield-group .viewfield').attr('d', viewfieldPath);
 
-               var currMode = context.mode().id;
-               if (/^draw/.test(currMode)) return;
+           function viewfieldPath() {
+             var d = this.parentNode.__data__;
 
-               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 (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 (buttons.enter().size() || buttons.exit().size()) {
-               context.ui().checkOverflow('.top-toolbar', true);
-             } // update
+           return this;
+         },
+         updateUrlImage: function updateUrlImage(imageKey) {
+           if (!window.mocha) {
+             var hash = utilStringQs(window.location.hash);
 
+             if (imageKey) {
+               hash.photo = 'streetside/' + imageKey;
+             } else {
+               delete hash.photo;
+             }
 
-             buttons = buttons.merge(buttonsEnter).classed('disabled', function (d) {
-               return !enabled();
-             }).classed('active', function (d) {
-               return context.mode() && context.mode().button === d.button;
-             });
+             window.location.replace('#' + utilQsString(hash, true));
            }
-         };
+         },
 
-         return tool;
-       }
+         /**
+          * cache().
+          */
+         cache: function cache() {
+           return _ssCache;
+         }
+       };
 
-       function uiToolNotes(context) {
-         var tool = {
-           id: 'notes',
-           label: _t.html('modes.add_note.label')
-         };
-         var mode = modeAddNote(context);
+       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 enabled() {
-           return notesEnabled() && notesEditable();
+       function sets(params, n, o) {
+         if (params.geometry && o[params.geometry]) {
+           params[n] = o[params.geometry];
          }
 
-         function notesEnabled() {
-           var noteLayer = context.layers().layer('notes');
-           return noteLayer && noteLayer.enabled();
-         }
+         return params;
+       }
 
-         function notesEditable() {
-           var mode = context.mode();
-           return context.map().notesEditable() && mode && mode.id !== 'save';
-         }
+       function setFilter(params) {
+         return sets(params, 'filter', tag_filters);
+       }
 
-         context.keybinding().on(mode.key, function () {
-           if (!enabled()) return;
+       function setSort(params) {
+         return sets(params, 'sortname', tag_sorts);
+       }
 
-           if (mode.id === context.mode().id) {
-             context.enter(modeBrowse(context));
-           } else {
-             context.enter(mode);
-           }
-         });
+       function setSortMembers(params) {
+         return sets(params, 'sortname', tag_sort_members);
+       }
 
-         tool.render = function (selection) {
-           var debouncedUpdate = debounce(update, 500, {
-             leading: true,
-             trailing: true
-           });
+       function clean(params) {
+         return utilObjectOmit(params, ['geometry', 'debounce']);
+       }
 
-           context.map().on('move.notes', debouncedUpdate).on('drawn.notes', debouncedUpdate);
-           context.on('enter.notes', update);
-           update();
+       function filterKeys(type) {
+         var count_type = type ? 'count_' + type : 'count_all';
+         return function (d) {
+           return parseFloat(d[count_type]) > 2500 || d.in_wiki;
+         };
+       }
 
-           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 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;
+         };
+       }
 
-             buttons.exit().remove(); // enter
+       function filterValues(allowUpperCase) {
+         return function (d) {
+           if (d.value.match(/[;,]/) !== null) return false; // exclude some punctuation
 
-             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 (!allowUpperCase && d.value.match(/[A-Z*]/) !== null) return false; // exclude uppercase letters
 
-               var currMode = context.mode().id;
-               if (/^draw/.test(currMode)) return;
+           return parseFloat(d.fraction) > 0.0;
+         };
+       }
 
-               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
+       function filterRoles(geometry) {
+         return function (d) {
+           if (d.role === '') return false; // exclude empty role
 
-             if (buttons.enter().size() || buttons.exit().size()) {
-               context.ui().checkOverflow('.top-toolbar', true);
-             } // update
+           if (d.role.match(/[A-Z*;,]/) !== null) return false; // exclude uppercase letters and some punctuation
 
+           return parseFloat(d[tag_members_fractions[geometry]]) > 0.0;
+         };
+       }
 
-             buttons = buttons.merge(buttonsEnter).classed('disabled', function (d) {
-               return !enabled();
-             }).classed('active', function (d) {
-               return context.mode() && context.mode().button === d.button;
-             });
-           }
+       function valKey(d) {
+         return {
+           value: d.key,
+           title: d.key
          };
+       }
 
-         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);
+       function valKeyDescription(d) {
+         var obj = {
+           value: d.value,
+           title: d.description || d.value
          };
 
-         return tool;
+         if (d.count) {
+           obj.count = d.count;
+         }
+
+         return obj;
        }
 
-       function uiToolSave(context) {
-         var tool = {
-           id: 'save',
-           label: _t.html('save.title')
+       function roleKey(d) {
+         return {
+           value: d.role,
+           title: d.role
          };
-         var button = null;
-         var tooltipBehavior = null;
-         var history = context.history();
-         var key = uiCmd('⌘S');
-         var _numChanges = 0;
+       } // sort keys with ':' lower than keys without ':'
 
-         function isSaving() {
-           var mode = context.mode();
-           return mode && mode.id === 'save';
-         }
 
-         function isDisabled() {
-           return _numChanges === 0 || isSaving();
-         }
+       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 save(d3_event) {
-           d3_event.preventDefault();
+       var debouncedRequest = debounce(request, 300, {
+         leading: false
+       });
 
-           if (!context.inIntro() && !isSaving() && history.hasChanges()) {
-             context.enter(modeSave(context));
-           }
-         }
+       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);
+         });
+       }
 
-         function bgColor() {
-           var step;
+       function checkCache(url, params, exactMatch, callback) {
+         var rp = params.rp || 25;
+         var testQuery = params.query || '';
+         var testUrl = url;
 
-           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
-           }
-         }
+         do {
+           var hit = _taginfoCache[testUrl]; // exact match, or shorter match yielding fewer than max results (rp)
 
-         function updateCount() {
-           var val = history.difference().summary().length;
-           if (val === _numChanges) return;
-           _numChanges = val;
+           if (hit && (url === testUrl || hit.length < rp)) {
+             callback(null, hit);
+             return true;
+           } // don't try to shorten the query
 
-           if (tooltipBehavior) {
-             tooltipBehavior.title(_t.html(_numChanges > 0 ? 'save.help' : 'save.no_changes')).keys([key]);
-           }
 
-           if (button) {
-             button.classed('disabled', isDisabled()).style('background', bgColor());
-             button.select('span.count').html(_numChanges);
-           }
-         }
+           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)
 
-         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);
+           testQuery = testQuery.slice(0, -1);
+           testUrl = url.replace(/&query=(.*?)&/, '&query=' + testQuery + '&');
+         } while (testQuery.length >= 0);
 
-             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'))();
+         return false;
+       }
+
+       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
+
+           var params = {
+             rp: 100,
+             sortname: 'values_all',
+             sortorder: 'desc',
+             page: 1,
+             debounce: false,
+             lang: _mainLocalizer.languageCode()
+           };
+           this.keys(params, function (err, data) {
+             if (err) return;
+             data.forEach(function (d) {
+               if (d.value === 'opening_hours') return; // exception
+
+               _popularKeys[d.value] = true;
+             });
+           });
+         },
+         reset: function reset() {
+           Object.values(_inflight).forEach(function (controller) {
+             controller.abort();
+           });
+           _inflight = {};
+         },
+         keys: function keys(params, callback) {
+           var doRequest = params.debounce ? debouncedRequest : request;
+           params = clean(setSort(params));
+           params = Object.assign({
+             rp: 10,
+             sortname: 'count_all',
+             sortorder: 'desc',
+             page: 1,
+             lang: _mainLocalizer.languageCode()
+           }, params);
+           var url = _apibase + 'keys/all?' + utilQsString(params);
+           doRequest(url, params, false, callback, function (err, d) {
+             if (err) {
+               callback(err);
+             } else {
+               var f = filterKeys(params.filter);
+               var result = d.data.filter(f).sort(sortKeys).map(valKey);
+               _taginfoCache[url] = result;
+               callback(null, result);
+             }
+           });
+         },
+         multikeys: function multikeys(params, callback) {
+           var doRequest = params.debounce ? debouncedRequest : request;
+           params = clean(setSort(params));
+           params = Object.assign({
+             rp: 25,
+             sortname: 'count_all',
+             sortorder: 'desc',
+             page: 1,
+             lang: _mainLocalizer.languageCode()
+           }, params);
+           var prefix = params.query;
+           var url = _apibase + 'keys/all?' + utilQsString(params);
+           doRequest(url, params, true, callback, function (err, d) {
+             if (err) {
+               callback(err);
+             } else {
+               var f = filterMultikeys(prefix);
+               var result = d.data.filter(f).map(valKey);
+               _taginfoCache[url] = result;
+               callback(null, result);
              }
+           });
+         },
+         values: function values(params, callback) {
+           // Exclude popular keys from values lookups.. see #3955
+           var key = params.key;
 
-             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());
+           if (key && _popularKeys[key]) {
+             callback(null, []);
+             return;
+           }
 
-               if (isSaving()) {
-                 button.call(tooltipBehavior.hide);
-               }
+           var doRequest = params.debounce ? debouncedRequest : request;
+           params = clean(setSort(setFilter(params)));
+           params = Object.assign({
+             rp: 25,
+             sortname: 'count_all',
+             sortorder: 'desc',
+             page: 1,
+             lang: _mainLocalizer.languageCode()
+           }, params);
+           var url = _apibase + 'key/values?' + utilQsString(params);
+           doRequest(url, params, false, callback, function (err, d) {
+             if (err) {
+               callback(err);
+             } else {
+               // In most cases we prefer taginfo value results with lowercase letters.
+               // A few OSM keys expect values to contain uppercase values (see #3377).
+               // This is not an exhaustive list (e.g. `name` also has uppercase values)
+               // but these are the fields where taginfo value lookup is most useful.
+               var re = /network|taxon|genus|species|brand|grape_variety|royal_cypher|listed_status|booth|rating|stars|:output|_hours|_times|_ref|manufacturer|country|target|brewery/;
+               var allowUpperCase = re.test(params.key);
+               var f = filterValues(allowUpperCase);
+               var result = d.data.filter(f).map(valKeyDescription);
+               _taginfoCache[url] = result;
+               callback(null, result);
              }
            });
-         };
+         },
+         roles: function roles(params, callback) {
+           var doRequest = params.debounce ? debouncedRequest : request;
+           var geometry = params.geometry;
+           params = clean(setSortMembers(params));
+           params = Object.assign({
+             rp: 25,
+             sortname: 'count_all_members',
+             sortorder: 'desc',
+             page: 1,
+             lang: _mainLocalizer.languageCode()
+           }, params);
+           var url = _apibase + 'relation/roles?' + utilQsString(params);
+           doRequest(url, params, true, callback, function (err, d) {
+             if (err) {
+               callback(err);
+             } else {
+               var f = filterRoles(geometry);
+               var result = d.data.filter(f).map(roleKey);
+               _taginfoCache[url] = result;
+               callback(null, result);
+             }
+           });
+         },
+         docs: function docs(params, callback) {
+           var doRequest = params.debounce ? debouncedRequest : request;
+           params = clean(setSort(params));
+           var path = 'key/wiki_pages?';
 
-         tool.uninstall = function () {
-           context.keybinding().off(key, true);
-           context.history().on('change.save', null);
-           context.on('enter.save', null);
-           button = null;
-           tooltipBehavior = null;
-         };
+           if (params.value) {
+             path = 'tag/wiki_pages?';
+           } else if (params.rtype) {
+             path = 'relation/wiki_pages?';
+           }
 
-         return tool;
-       }
+           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;
+         }
+       };
 
-       function uiToolSidebarToggle(context) {
-         var tool = {
-           id: 'sidebar_toggle',
-           label: _t.html('toolbar.inspect')
-         };
+       /**
+        * 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
+        */
 
-         tool.render = function (selection) {
-           selection.append('button').attr('class', 'bar-button').on('click', function () {
-             context.ui().sidebar.toggle();
-           }).call(uiTooltip().placement('bottom').title(_t.html('sidebar.tooltip')).keys([_t('sidebar.key')]).scrollContainer(context.container().select('.top-toolbar'))).call(svgIcon('#iD-icon-sidebar-' + (_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left')));
+       function feature(geom, properties, options) {
+         if (options === void 0) {
+           options = {};
+         }
+
+         var feat = {
+           type: "Feature"
          };
 
-         return tool;
-       }
+         if (options.id === 0 || options.id) {
+           feat.id = options.id;
+         }
 
-       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 (options.bbox) {
+           feat.bbox = options.bbox;
+         }
+
+         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
+        */
 
-         function editable() {
-           return context.mode() && context.mode().id !== 'save' && context.map().editableDataEnabled(true
-           /* ignore min zoom */
-           );
+       function polygon(coordinates, properties, options) {
+         if (options === void 0) {
+           options = {};
          }
 
-         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();
+         for (var _i = 0, coordinates_1 = coordinates; _i < coordinates_1.length; _i++) {
+           var ring = coordinates_1[_i];
 
-             if (editable() && annotation) {
-               d.action();
-             }
+           if (ring.length < 4) {
+             throw new Error("Each LinearRing of a Polygon must have 4 or more Positions.");
+           }
 
-             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)();
+           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.");
              }
+           }
+         }
 
-             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 debouncedUpdate = debounce(update, 500, {
-             leading: true,
-             trailing: true
-           });
+         var geom = {
+           type: "Polygon",
+           coordinates: coordinates
+         };
+         return feature(geom, properties, options);
+       }
+       /**
+        * Creates a {@link LineString} {@link Feature} from an Array of Positions.
+        *
+        * @name lineString
+        * @param {Array<Array<number>>} coordinates an array of Positions
+        * @param {Object} [properties={}] an Object of key-value pairs to add as properties
+        * @param {Object} [options={}] Optional Parameters
+        * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
+        * @param {string|number} [options.id] Identifier associated with the Feature
+        * @returns {Feature<LineString>} LineString Feature
+        * @example
+        * var linestring1 = turf.lineString([[-24, 63], [-23, 60], [-25, 65], [-20, 69]], {name: 'line 1'});
+        * var linestring2 = turf.lineString([[-14, 43], [-13, 40], [-15, 45], [-10, 49]], {name: 'line 2'});
+        *
+        * //=linestring1
+        * //=linestring2
+        */
 
-           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);
+       function lineString(coordinates, properties, options) {
+         if (options === void 0) {
+           options = {};
+         }
 
-           function update() {
-             buttons.classed('disabled', function (d) {
-               return !editable() || !d.annotation();
-             }).each(function () {
-               var selection = select(this);
+         if (coordinates.length < 2) {
+           throw new Error("coordinates must be an array of two or more positions");
+         }
 
-               if (!selection.select('.tooltip.in').empty()) {
-                 selection.call(tooltipBehavior.updateContent);
-               }
-             });
-           }
+         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
+        */
 
-         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);
+       function multiLineString(coordinates, properties, options) {
+         if (options === void 0) {
+           options = {};
+         }
+
+         var geom = {
+           type: "MultiLineString",
+           coordinates: coordinates
          };
+         return feature(geom, properties, options);
+       }
+       /**
+        * Creates a {@link Feature<MultiPolygon>} based on a
+        * coordinate array. Properties can be added optionally.
+        *
+        * @name multiPolygon
+        * @param {Array<Array<Array<Array<number>>>>} coordinates an array of Polygons
+        * @param {Object} [properties={}] an Object of key-value pairs to add as properties
+        * @param {Object} [options={}] Optional Parameters
+        * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
+        * @param {string|number} [options.id] Identifier associated with the Feature
+        * @returns {Feature<MultiPolygon>} a multipolygon feature
+        * @throws {Error} if no coordinates are passed
+        * @example
+        * var multiPoly = turf.multiPolygon([[[[0,0],[0,10],[10,10],[10,0],[0,0]]]]);
+        *
+        * //=multiPoly
+        *
+        */
 
-         return tool;
+       function multiPolygon(coordinates, properties, options) {
+         if (options === void 0) {
+           options = {};
+         }
+
+         var geom = {
+           type: "MultiPolygon",
+           coordinates: coordinates
+         };
+         return feature(geom, properties, options);
        }
 
-       function uiTopToolbar(context) {
-         var sidebarToggle = uiToolSidebarToggle(context),
-             modes = uiToolOldDrawModes(context),
-             notes = uiToolNotes(context),
-             undoRedo = uiToolUndoRedo(context),
-             save = uiToolSave(context);
+       /**
+        * 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 notesEnabled() {
-           var noteLayer = context.layers().layer('notes');
-           return noteLayer && noteLayer.enabled();
+       function getGeom(geojson) {
+         if (geojson.type === "Feature") {
+           return geojson.geometry;
          }
 
-         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 geojson;
+       }
 
-           var debouncedUpdate = debounce(update, 500, {
-             leading: true,
-             trailing: true
-           });
+       // 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 = [];
 
-           context.layers().on('change.topToolbar', debouncedUpdate);
-           update();
+         for (i = 1; i < len; i++) {
+           a = points[i - 1];
+           b = points[i];
+           codeB = lastCode = bitCode(b, bbox);
 
-           function update() {
-             var tools = [sidebarToggle, 'spacer', modes];
-             tools.push('spacer');
+           while (true) {
+             if (!(codeA | codeB)) {
+               // accept
+               part.push(a);
 
-             if (notesEnabled()) {
-               tools = tools.concat([notes, 'spacer']);
-             }
+               if (codeB !== lastCode) {
+                 // segment went outside
+                 part.push(b);
 
-             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();
+                 if (i < len - 1) {
+                   // start a new line
+                   result.push(part);
+                   part = [];
+                 }
+               } else if (i === len - 1) {
+                 part.push(b);
                }
-             }).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;
-             });
+
+               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;
          }
 
-         return topToolbar;
-       }
+         if (part.length) result.push(part);
+         return result;
+       } // Sutherland-Hodgeman polygon clipping algorithm
 
-       var sawVersion = null;
-       var isNewVersion = false;
-       var isNewUser = false;
-       function uiVersion(context) {
-         var currVersion = context.version;
-         var matchedVersion = currVersion.match(/\d+\.\d+\.\d+.*/);
+       function polygonclip(points, bbox) {
+         var result, edge, prev, prevInside, i, p, inside; // clip against each side of the clip rectangle
 
-         if (sawVersion === null && matchedVersion !== null) {
-           if (corePreferences('sawVersion')) {
-             isNewUser = false;
-             isNewVersion = corePreferences('sawVersion') !== currVersion && currVersion.indexOf('-') === -1;
-           } else {
-             isNewUser = true;
-             isNewVersion = true;
+         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
+
+             prev = p;
+             prevInside = inside;
            }
 
-           corePreferences('sawVersion', currVersion);
-           sawVersion = currVersion;
+           points = result;
+           if (!points.length) break;
          }
 
-         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
+         return result;
+       } // intersect a segment against one of the 4 lines that make up the bbox
 
-           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 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 (p[1] < bbox[1]) code |= 4; // bottom
+         else if (p[1] > bbox[3]) code |= 8; // top
+
+         return code;
        }
 
-       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: '-'
-         }];
+       /**
+        * Takes a {@link Feature} and a bbox and clips the feature to the bbox using
+        * [lineclip](https://github.com/mapbox/lineclip).
+        * May result in degenerate edges when clipping Polygons.
+        *
+        * @name bboxClip
+        * @param {Feature<LineString|MultiLineString|Polygon|MultiPolygon>} feature feature to clip to the bbox
+        * @param {BBox} bbox extent in [minX, minY, maxX, maxY] order
+        * @returns {Feature<LineString|MultiLineString|Polygon|MultiPolygon>} clipped Feature
+        * @example
+        * var bbox = [0, 0, 10, 10];
+        * var poly = turf.polygon([[[2, 2], [8, 4], [12, 8], [3, 7], [2, 2]]]);
+        *
+        * var clipped = turf.bboxClip(poly, bbox);
+        *
+        * //addToMap
+        * var addToMap = [bbox, poly, clipped]
+        */
 
-         function zoomIn(d3_event) {
-           if (d3_event.shiftKey) return;
-           d3_event.preventDefault();
-           context.map().zoomIn();
-         }
+       function bboxClip(feature, bbox) {
+         var geom = getGeom(feature);
+         var type = geom.type;
+         var properties = feature.type === "Feature" ? feature.properties : {};
+         var coords = geom.coordinates;
 
-         function zoomOut(d3_event) {
-           if (d3_event.shiftKey) return;
-           d3_event.preventDefault();
-           context.map().zoomOut();
-         }
+         switch (type) {
+           case "LineString":
+           case "MultiLineString":
+             var lines_1 = [];
 
-         function zoomInFurther(d3_event) {
-           if (d3_event.shiftKey) return;
-           d3_event.preventDefault();
-           context.map().zoomInFurther();
-         }
+             if (type === "LineString") {
+               coords = [coords];
+             }
 
-         function zoomOutFurther(d3_event) {
-           if (d3_event.shiftKey) return;
-           d3_event.preventDefault();
-           context.map().zoomOutFurther();
+             coords.forEach(function (line) {
+               lineclip(line, bbox, lines_1);
+             });
+
+             if (lines_1.length === 1) {
+               return lineString(lines_1[0], properties);
+             }
+
+             return multiLineString(lines_1, properties);
+
+           case "Polygon":
+             return polygon(clipPolygon(coords, bbox), properties);
+
+           case "MultiPolygon":
+             return multiPolygon(coords.map(function (poly) {
+               return clipPolygon(poly, bbox);
+             }), properties);
+
+           default:
+             throw new Error("geometry " + type + " not supported");
          }
+       }
 
-         return function (selection) {
-           var tooltipBehavior = uiTooltip().placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left').title(function (d) {
-             if (d.disabled()) {
-               return d.disabledTitle;
+       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]);
              }
 
-             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 (clipped.length >= 4) {
+               outRings.push(clipped);
              }
+           }
+         }
 
-             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);
-           });
+         return outRings;
+       }
 
-           function updateButtonStates() {
-             buttons.classed('disabled', function (d) {
-               return d.disabled();
-             }).each(function () {
-               var selection = select(this);
+       var tiler = utilTiler().tileSize(512).margin(1);
+       var dispatch = dispatch$8('loadedData');
 
-               if (!selection.select('.tooltip.in').empty()) {
-                 selection.call(tooltipBehavior.updateContent);
-               }
-             });
-           }
+       var _vtCache;
 
-           updateButtonStates();
-           context.map().on('move.uiZoom', updateButtonStates);
-         };
+       function abortRequest(controller) {
+         controller.abort();
        }
 
-       function uiZoomToSelection(context) {
-         function isDisabled() {
-           var mode = context.mode();
-           return !mode || !mode.zoomToSelected;
+       function vtToGeoJSON(data, tile, mergeCache) {
+         var vectorTile$1 = new vectorTile.VectorTile(new pbf(data));
+         var layers = Object.keys(vectorTile$1.layers);
+
+         if (!Array.isArray(layers)) {
+           layers = [layers];
          }
 
-         var _lastPointerUpType;
+         var features = [];
+         layers.forEach(function (layerID) {
+           var layer = vectorTile$1.layers[layerID];
 
-         function pointerup(d3_event) {
-           _lastPointerUpType = d3_event.pointerType;
-         }
+           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 click(d3_event) {
-           d3_event.preventDefault();
+               if (geometry.type === 'Polygon') {
+                 geometry.type = 'MultiPolygon';
+                 geometry.coordinates = [geometry.coordinates];
+               }
 
-           if (isDisabled()) {
-             if (_lastPointerUpType === 'touch' || _lastPointerUpType === 'pen') {
-               context.ui().flash.duration(2000).iconName('#iD-icon-framed-dot').iconClass('disabled').label(_t.html('inspector.zoom_to.no_selection'))();
-             }
-           } else {
-             var mode = context.mode();
+               var isClipped = false; // Clip to tile bounds
 
-             if (mode && mode.zoomToSelected) {
-               mode.zoomToSelected();
-             }
-           }
+               if (geometry.type === 'MultiPolygon') {
+                 var featureClip = bboxClip(feature, tile.extent.rectangle());
 
-           _lastPointerUpType = null;
-         }
+                 if (!fastDeepEqual(feature.geometry, featureClip.geometry)) {
+                   // feature = featureClip;
+                   isClipped = true;
+                 }
 
-         return function (selection) {
-           var tooltipBehavior = uiTooltip().placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left').title(function () {
-             if (isDisabled()) {
-               return _t.html('inspector.zoom_to.no_selection');
-             }
+                 if (!feature.geometry.coordinates.length) continue; // not actually on this tile
 
-             return _t.html('inspector.zoom_to.title');
-           }).keys([_t('inspector.zoom_to.key')]);
-           var button = selection.append('button').on('pointerup', pointerup).on('click', click).call(svgIcon('#iD-icon-framed-dot', 'light')).call(tooltipBehavior);
+                 if (!feature.geometry.coordinates[0].length) continue; // not actually on this tile
+               } // Generate some unique IDs and add some metadata
 
-           function setEnabledState() {
-             button.classed('disabled', isDisabled());
 
-             if (!button.select('.tooltip.in').empty()) {
-               button.call(tooltipBehavior.updateContent);
+               var featurehash = utilHashcode(fastJsonStableStringify(feature));
+               var propertyhash = utilHashcode(fastJsonStableStringify(feature.properties || {}));
+               feature.__layerID__ = layerID.replace(/[^_a-zA-Z0-9\-]/g, '_');
+               feature.__featurehash__ = featurehash;
+               feature.__propertyhash__ = propertyhash;
+               features.push(feature); // Clipped Polygons at same zoom with identical properties can get merged
+
+               if (isClipped && geometry.type === 'MultiPolygon') {
+                 var merged = mergeCache[propertyhash];
+
+                 if (merged && merged.length) {
+                   var other = merged[0];
+                   var coords = index.union(feature.geometry.coordinates, other.geometry.coordinates);
+
+                   if (!coords || !coords.length) {
+                     continue; // something failed in polygon union
+                   }
+
+                   merged.push(feature);
+
+                   for (var j = 0; j < merged.length; j++) {
+                     // all these features get...
+                     merged[j].geometry.coordinates = coords; // same coords
+
+                     merged[j].__featurehash__ = featurehash; // same hash, so deduplication works
+                   }
+                 } else {
+                   mergeCache[propertyhash] = [feature];
+                 }
+               }
              }
            }
-
-           context.on('enter.uiZoomToSelection', setEnabledState);
-           setEnabledState();
-         };
+         });
+         return features;
        }
 
-       function uiPane(id, context) {
-         var _key;
+       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);
+           }
 
-         var _label = '';
-         var _description = '';
-         var _iconName = '';
+           source.loaded[tile.id] = [];
+           delete source.inflight[tile.id];
+           return response.arrayBuffer();
+         }).then(function (data) {
+           if (!data) {
+             throw new Error('No Data');
+           }
+
+           var z = tile.xyz[2];
+
+           if (!source.canMerge[z]) {
+             source.canMerge[z] = {}; // initialize mergeCache
+           }
+
+           source.loaded[tile.id] = vtToGeoJSON(data, tile, source.canMerge[z]);
+           dispatch.call('loadedData');
+         })["catch"](function () {
+           source.loaded[tile.id] = [];
+           delete source.inflight[tile.id];
+         });
+       }
 
-         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();
-
-           context.ui().togglePanes(!_paneSelection.classed('shown') ? _paneSelection : undefined);
-         };
-
-         pane.renderToggleButton = function (selection) {
-           if (!_paneTooltip) {
-             _paneTooltip = uiTooltip().placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left').title(_description).keys([_key]);
+       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;
            }
 
-           selection.append('button').on('click', pane.togglePane).call(svgIcon('#' + _iconName, 'light')).call(_paneTooltip);
-         };
+           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.renderContent = function (selection) {
-           // override to fully customize content
-           if (_sections) {
-             _sections.forEach(function (section) {
-               selection.call(section.render);
-             });
+             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;
            }
-         };
 
-         pane.renderPane = function (selection) {
-           _paneSelection = selection.append('div').attr('class', 'fillL map-pane hide ' + id + '-pane').attr('pane', id);
+           lang = lang || 'en';
+           var url = apibase + utilQsString({
+             action: 'wbgetentities',
+             format: 'json',
+             formatversion: 2,
+             sites: lang.replace(/-/g, '_') + 'wiki',
+             titles: title,
+             languages: 'en',
+             // shrink response by filtering to one language
+             origin: '*'
+           });
+           d3_json(url).then(function (result) {
+             if (result && result.error) {
+               throw new Error(result.error);
+             }
 
-           var heading = _paneSelection.append('div').attr('class', 'pane-heading');
+             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;
+           }
 
-           heading.append('h2').html(_label);
-           heading.append('button').on('click', hidePane).call(svgIcon('#iD-icon-close'));
+           if (_wikidataCache[qid]) {
+             if (callback) callback(null, _wikidataCache[qid]);
+             return;
+           }
 
-           _paneSelection.append('div').attr('class', 'pane-content').call(pane.renderContent);
+           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);
+             }
 
-           if (_key) {
-             context.keybinding().on(_key, pane.togglePane);
-           }
-         };
+             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;
+             }
 
-         return pane;
-       }
+             var i;
+             var description;
 
-       function uiSectionBackgroundDisplayOptions(context) {
-         var section = uiSection('background-display-options', context).label(_t.html('background.display_options')).disclosureContent(renderDisclosureContent);
+             for (i in langs) {
+               var code = langs[i];
 
-         var _detected = utilDetect();
+               if (entity.descriptions[code] && entity.descriptions[code].language === code) {
+                 description = entity.descriptions[code];
+                 break;
+               }
+             }
 
-         var _storedOpacity = corePreferences('background-opacity');
+             if (!description && Object.values(entity.descriptions).length) description = Object.values(entity.descriptions)[0]; // prepare result
 
-         var _minVal = 0;
+             var result = {
+               title: entity.id,
+               description: description ? description.value : '',
+               descriptionLocaleCode: description ? description.language : '',
+               editURL: 'https://www.wikidata.org/wiki/' + entity.id
+             }; // add image
 
-         var _maxVal = _detected.cssfilters ? 3 : 1;
+             if (entity.claims) {
+               var imageroot = 'https://commons.wikimedia.org/w/index.php';
+               var props = ['P154', 'P18']; // logo image, image
 
-         var _sliders = _detected.cssfilters ? ['brightness', 'contrast', 'saturation', 'sharpness'] : ['brightness'];
+               var prop, image;
 
-         var _options = {
-           brightness: _storedOpacity !== null ? +_storedOpacity : 1,
-           contrast: 1,
-           saturation: 1,
-           sharpness: 1
-         };
+               for (i = 0; i < props.length; i++) {
+                 prop = entity.claims[props[i]];
 
-         function clamp(x, min, max) {
-           return Math.max(min, Math.min(x, max));
-         }
+                 if (prop && Object.keys(prop).length > 0) {
+                   image = prop[Object.keys(prop)[0]].mainsnak.datavalue.value;
 
-         function updateValue(d, val) {
-           val = clamp(val, _minVal, _maxVal);
-           _options[d] = val;
-           context.background()[d](val);
+                   if (image) {
+                     result.imageURL = imageroot + '?' + utilQsString({
+                       title: 'Special:Redirect/file/' + image,
+                       width: 400
+                     });
+                     break;
+                   }
+                 }
+               }
+             }
 
-           if (d === 'brightness') {
-             corePreferences('background-opacity', val);
-           }
+             if (entity.sitelinks) {
+               var englishLocale = _mainLocalizer.languageCode().toLowerCase() === 'en'; // must be one of these that we requested..
 
-           section.reRender();
-         }
+               for (i = 0; i < langs.length; i++) {
+                 // check each, in order of preference
+                 var w = langs[i] + 'wiki';
 
-         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
+                 if (entity.sitelinks[w]) {
+                   var title = entity.sitelinks[w].title;
+                   var tKey = 'inspector.wiki_reference';
 
-           var slidersEnter = containerEnter.selectAll('.display-control').data(_sliders).enter().append('div').attr('class', function (d) {
-             return 'display-control display-control-' + d;
-           });
-           slidersEnter.append('h5').html(function (d) {
-             return _t.html('background.' + d);
-           }).append('span').attr('class', function (d) {
-             return 'display-option-value display-option-value-' + d;
-           });
-           var sildersControlEnter = slidersEnter.append('div').attr('class', 'control-wrap');
-           sildersControlEnter.append('input').attr('class', function (d) {
-             return 'display-option-input display-option-input-' + d;
-           }).attr('type', 'range').attr('min', _minVal).attr('max', _maxVal).attr('step', '0.05').on('input', function (d3_event, d) {
-             var val = select(this).property('value');
+                   if (!englishLocale && langs[i] === 'en') {
+                     // user's locale isn't English but
+                     tKey = 'inspector.wiki_en_reference'; // we are sending them to enwiki anyway..
+                   }
 
-             if (!val && d3_event && d3_event.target) {
-               val = d3_event.target.value;
+                   result.wiki = {
+                     title: title,
+                     text: tKey,
+                     url: 'https://' + langs[i] + '.wikipedia.org/wiki/' + title.replace(/ /g, '_')
+                   };
+                   break;
+                 }
+               }
              }
 
-             updateValue(d, val);
+             callback(null, result);
            });
-           sildersControlEnter.append('button').attr('title', _t('background.reset')).attr('class', function (d) {
-             return 'display-option-reset display-option-reset-' + d;
-           }).on('click', function (d3_event, d) {
-             if (d3_event.button !== 0) return;
-             updateValue(d, 1);
-           }).call(svgIcon('#iD-icon-' + (_mainLocalizer.textDirection() === 'rtl' ? 'redo' : 'undo'))); // reset all button
+         }
+       };
 
-           containerEnter.append('a').attr('class', 'display-option-resetlink').attr('href', '#').html(_t.html('background.reset_all')).on('click', function (d3_event) {
-             d3_event.preventDefault();
+       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;
+           }
 
-             for (var i = 0; i < _sliders.length; i++) {
-               updateValue(_sliders[i], 1);
+           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');
              }
-           }); // 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) + '%';
+             if (callback) {
+               var titles = result.query.search.map(function (d) {
+                 return d.title;
+               });
+               callback(null, titles);
+             }
+           })["catch"](function (err) {
+             if (callback) callback(err, []);
            });
-           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);
+         },
+         suggestions: function suggestions(lang, query, callback) {
+           if (!query) {
+             if (callback) callback('', []);
+             return;
            }
-         }
-
-         return section;
-       }
 
-       function uiSettingsCustomBackground() {
-         var dispatch$1 = dispatch('change');
+           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');
+             }
 
-         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
+             if (callback) callback(null, result[1] || []);
+           })["catch"](function (err) {
+             if (callback) callback(err.message, []);
+           });
+         },
+         translations: function translations(lang, title, callback) {
+           if (!title) {
+             if (callback) callback('No Title');
+             return;
+           }
 
-           var 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 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');
+             }
 
-           function isSaveDisabled() {
-             return null;
-           } // restore the original template
+             if (callback) {
+               var list = result.query.pages[Object.keys(result.query.pages)[0]];
+               var translations = {};
 
+               if (list && list.langlinks) {
+                 list.langlinks.forEach(function (d) {
+                   translations[d.lang] = d['*'];
+                 });
+               }
 
-           function clickCancel() {
-             textSection.select('.field-template').property('value', _origSettings.template);
-             corePreferences('background-custom-template', _origSettings.template);
-             this.blur();
-             modal.close();
-           } // accept the current template
+               callback(null, translations);
+             }
+           })["catch"](function (err) {
+             if (callback) callback(err.message);
+           });
+         }
+       };
 
+       var services = {
+         geocoder: serviceNominatim,
+         keepRight: serviceKeepRight,
+         improveOSM: serviceImproveOSM,
+         osmose: serviceOsmose,
+         mapillary: serviceMapillary,
+         nsi: serviceNsi,
+         openstreetcam: serviceOpenstreetcam,
+         osm: serviceOsm,
+         osmWikibase: serviceOsmWikibase,
+         maprules: serviceMapRules,
+         streetside: serviceStreetside,
+         taginfo: serviceTaginfo,
+         vectorTile: serviceVectorTile,
+         wikidata: serviceWikidata,
+         wikipedia: serviceWikipedia
+       };
 
-           function 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 modeDragNote(context) {
+         var mode = {
+           id: 'drag-note',
+           button: 'browse'
+         };
+         var edit = behaviorEdit(context);
 
-         return utilRebind(render, dispatch$1, 'on');
-       }
+         var _nudgeInterval;
 
-       function uiSectionBackgroundList(context) {
-         var _backgroundList = select(null);
+         var _lastLoc;
 
-         var _customSource = context.background().findSource('custom');
+         var _note; // most current note.. dragged note may have stale datum.
 
-         var _settingsCustomBackground = uiSettingsCustomBackground().on('change', customChanged);
 
-         var section = uiSection('background-list', context).label(_t.html('background.backgrounds')).disclosureContent(renderDisclosureContent);
+         function startNudge(d3_event, nudge) {
+           if (_nudgeInterval) window.clearInterval(_nudgeInterval);
+           _nudgeInterval = window.setInterval(function () {
+             context.map().pan(nudge);
+             doMove(d3_event, nudge);
+           }, 50);
+         }
 
-         function previousBackgroundID() {
-           return corePreferences('background-last-used-toggle');
+         function stopNudge() {
+           if (_nudgeInterval) {
+             window.clearInterval(_nudgeInterval);
+             _nudgeInterval = null;
+           }
          }
 
-         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 origin(note) {
+           return context.projection(note.loc);
+         }
 
-           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', 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 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() {
-           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 uiPaneBackground(context) {
-         var backgroundPane = uiPane('background', context).key(_t('background.key')).label(_t.html('background.title')).description(_t.html('background.description')).iconName('iD-icon-layers').sections([uiSectionBackgroundList(context), uiSectionOverlayList(context), uiSectionBackgroundDisplayOptions(context), uiSectionBackgroundOffset(context)]);
-         return backgroundPane;
-       }
-
-       function 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?
+         function didLongPress(id, interactionType) {
+           var pointer = _downPointers[id];
+           if (!pointer) return;
 
-             var hhh = depth ? Array(depth + 1).join('#') + ' ' : ''; // if so, prepend with some ##'s
+           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
 
-             return all + hhh + helpHtml(subkey, helpPaneReplacements) + '\n\n';
-           }, '');
-           return {
-             title: _t.html(helpkey + '.title'),
-             content: marked_1(text.trim()) // use keyboard key styling for shortcuts
-             .replace(/<code>/g, '<kbd>').replace(/<\/code>/g, '<\/kbd>')
-           };
-         });
-         var helpPane = uiPane('help', context).key(_t('help.key')).label(_t.html('help.title')).description(_t.html('help.title')).iconName('iD-icon-help');
 
-         helpPane.renderContent = function (content) {
-           function clickHelp(d, i) {
-             var rtl = _mainLocalizer.textDirection() === 'rtl';
-             content.property('scrollTop', 0);
-             helpPane.selection().select('.pane-heading h2').html(d.title);
-             body.html(d.content);
-             body.selectAll('a').attr('target', '_blank');
-             menuItems.classed('selected', function (m) {
-               return m.title === d.title;
-             });
-             nav.html('');
+           _longPressTimeout = null;
+           _lastInteractionType = interactionType;
+           _showMenu = true;
+           click(pointer.firstEvent, pointer.lastEvent, id);
+         }
 
-             if (rtl) {
-               nav.call(drawNext).call(drawPrevious);
-             } else {
-               nav.call(drawPrevious).call(drawNext);
-             }
+         function pointermove(d3_event) {
+           var id = (d3_event.pointerId || 'mouse').toString();
 
-             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'));
-               }
-             }
+           if (_downPointers[id]) {
+             _downPointers[id].lastEvent = d3_event;
+           }
 
-             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 (!d3_event.pointerType || d3_event.pointerType === 'mouse') {
+             _lastMouseEvent = d3_event;
+
+             if (_downPointers.spacebar) {
+               _downPointers.spacebar.lastEvent = d3_event;
              }
            }
+         }
 
-           function clickWalkthrough(d3_event) {
-             d3_event.preventDefault();
-             if (context.inIntro()) return;
-             context.container().call(uiIntro(context));
-             context.ui().togglePanes();
-           }
+         function pointerup(d3_event) {
+           var id = (d3_event.pointerId || 'mouse').toString();
+           var pointer = _downPointers[id];
+           if (!pointer) return;
+           delete _downPointers[id];
 
-           function clickShortcuts(d3_event) {
-             d3_event.preventDefault();
-             context.container().call(context.ui().shortcuts, true);
+           if (_multiselectionPointerId === id) {
+             _multiselectionPointerId = null;
            }
 
-           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);
-         };
+           if (pointer.done) return;
+           click(pointer.firstEvent, d3_event, id);
+         }
 
-         return helpPane;
-       }
+         function pointercancel(d3_event) {
+           var id = (d3_event.pointerId || 'mouse').toString();
+           if (!_downPointers[id]) return;
+           delete _downPointers[id];
 
-       function uiSectionValidationIssues(id, severity, context) {
-         var _issues = [];
-         var section = uiSection(id, context).label(function () {
-           if (!_issues) return '';
-           var issueCountText = _issues.length > 1000 ? '1000+' : String(_issues.length);
-           return _t('inspector.title_count', {
-             title: _t.html('issues.' + severity + 's.list_title'),
-             count: issueCountText
-           });
-         }).disclosureContent(renderDisclosureContent).shouldDisplay(function () {
-           return _issues && _issues.length;
-         });
+           if (_multiselectionPointerId === id) {
+             _multiselectionPointerId = null;
+           }
+         }
 
-         function getOptions() {
-           return {
-             what: corePreferences('validate-what') || 'edited',
-             where: corePreferences('validate-where') || 'all'
-           };
-         } // get and cache the issues to display, unordered
+         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';
+           }
 
-         function reloadIssues() {
-           _issues = context.validator().getIssuesBySeverity(getOptions())[severity];
+           _showMenu = true;
+           click(d3_event, d3_event);
          }
 
-         function renderDisclosureContent(selection) {
-           var center = context.map().center();
-           var graph = context.graph(); // sort issues by distance away from the center of the map
-
-           var issues = _issues.map(function withDistance(issue) {
-             var extent = issue.extent(graph);
-             var dist = extent ? geoSphericalDistance(center, extent.center()) : 0;
-             return Object.assign(issue, {
-               dist: dist
-             });
-           }).sort(function byDistance(a, b) {
-             return a.dist - b.dist;
-           }); // cut off at 1000
+         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.
 
+           var pointGetter = utilFastMouse(mapNode);
+           var p1 = pointGetter(firstEvent);
+           var p2 = pointGetter(lastEvent);
+           var dist = geoVecLength(p1, p2);
 
-           issues = issues.slice(0, 1000); //renderIgnoredIssuesReset(_warningsSelection);
+           if (dist > _tolerancePx || !mapContains(lastEvent)) {
+             resetProperties();
+             return;
+           }
 
-           selection.call(drawIssuesList, issues);
-         }
+           var targetDatum = lastEvent.target.__data__;
+           var 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
+           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);
 
-           items.exit().remove(); // Enter
+             if (selectPointerInfo) {
+               _multiselectionPointerId = selectPointerInfo.pointerId; // if the other feature isn't selected yet, make sure we select it
 
-           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
+               multiselectEntityId = !selectPointerInfo.selected && selectPointerInfo.entityId;
+               _downPointers[selectPointerInfo.pointerId].done = true;
+             }
+           } // support multiselect if data is already selected
 
-           items = items.merge(itemsEnter).order();
-           items.selectAll('.issue-message').html(function (d) {
-             return d.message(context);
-           });
-           /*
-           // autofix
-           var canAutoFix = issues.filter(function(issue) { return issue.autoFix; });
-            var autoFixAll = selection.selectAll('.autofix-all')
-               .data(canAutoFix.length ? [0] : []);
-            // exit
-           autoFixAll.exit()
-               .remove();
-            // enter
-           var autoFixAllEnter = autoFixAll.enter()
-               .insert('div', '.issues-list')
-               .attr('class', 'autofix-all');
-            var linkEnter = autoFixAllEnter
-               .append('a')
-               .attr('class', 'autofix-all-link')
-               .attr('href', '#');
-            linkEnter
-               .append('span')
-               .attr('class', 'autofix-all-link-text')
-               .html(t.html('issues.fix_all.title'));
-            linkEnter
-               .append('span')
-               .attr('class', 'autofix-all-link-icon')
-               .call(svgIcon('#iD-icon-wrench'));
-            if (severity === 'warning') {
-               renderIgnoredIssuesReset(selection);
-           }
-            // update
-           autoFixAll = autoFixAll
-               .merge(autoFixAllEnter);
-            autoFixAll.selectAll('.autofix-all-link')
-               .on('click', function() {
-                   context.pauseChangeDispatch();
-                   context.perform(actionNoop());
-                   canAutoFix.forEach(function(issue) {
-                       var args = issue.autoFix.autoArgs.slice();  // copy
-                       if (typeof args[args.length - 1] !== 'function') {
-                           args.pop();
-                       }
-                       args.push(t('issues.fix_all.annotation'));
-                       context.replace.apply(context, args);
-                   });
-                   context.resumeChangeDispatch();
-                   context.validator().validate();
-               });
-           */
-         }
 
-         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
+           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);
 
+           processClick(targetDatum, isMultiselect, p2, multiselectEntityId);
 
-             section.reRender();
-           });
-         }, 1000));
-         return section;
-       }
+           function mapContains(event) {
+             var rect = mapNode.getBoundingClientRect();
+             return event.clientX >= rect.left && event.clientX <= rect.right && event.clientY >= rect.top && event.clientY <= rect.bottom;
+           }
 
-       function uiSectionValidationOptions(context) {
-         var section = uiSection('issues-options', context).content(renderContent);
+           function pointerDownOnSelection(skipPointerId) {
+             var mode = context.mode();
+             var selectedIDs = mode.id === 'select' ? mode.selectedIDs() : [];
 
-         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);
-           });
-         }
+             for (var pointerId in _downPointers) {
+               if (pointerId === 'spacebar' || pointerId === skipPointerId) continue;
+               var pointerInfo = _downPointers[pointerId];
+               var p1 = pointGetter(pointerInfo.firstEvent);
+               var p2 = pointGetter(pointerInfo.lastEvent);
+               if (geoVecLength(p1, p2) > _tolerancePx) continue;
+               var datum = pointerInfo.firstEvent.target.__data__;
+               var entity = datum && datum.properties && datum.properties.entity || datum;
 
-         function getOptions() {
-           return {
-             what: corePreferences('validate-what') || 'edited',
-             // 'all', 'edited'
-             where: corePreferences('validate-where') || 'all' // 'all', 'visible'
+               if (context.graph().hasEntity(entity.id)) {
+                 return {
+                   pointerId: pointerId,
+                   entityId: entity.id,
+                   selected: selectedIDs.indexOf(entity.id) !== -1
+                 };
+               }
+             }
 
-           };
+             return null;
+           }
          }
 
-         function updateOptionValue(d3_event, d, val) {
-           if (!val && d3_event && d3_event.target) {
-             val = d3_event.target.value;
+         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];
            }
 
-           corePreferences('validate-' + d, val);
-           context.validator().validate();
-         }
+           var newMode;
 
-         return section;
-       }
+           if (datum instanceof osmEntity) {
+             // targeting an entity
+             var selectedIDs = context.selectedIDs();
+             context.selectedNoteID(null);
+             context.selectedErrorID(null);
 
-       function uiSectionValidationRules(context) {
-         var MINSQUARE = 0;
-         var MAXSQUARE = 20;
-         var DEFAULTSQUARE = 5; // see also unsquare_way.js
+             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 section = uiSection('issues-rules', context).disclosureContent(renderDisclosureContent).label(_t.html('issues.rules.title'));
+                 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);
 
-         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;
-         });
+             if (!isMultiselect && mode.id !== 'browse') {
+               context.enter(modeBrowse(context));
+             }
+           }
 
-         function renderDisclosureContent(selection) {
-           var container = selection.selectAll('.issues-rulelist-container').data([0]);
-           var containerEnter = container.enter().append('div').attr('class', 'issues-rulelist-container');
-           containerEnter.append('ul').attr('class', 'layer-list issue-rules-list');
-           var ruleLinks = containerEnter.append('div').attr('class', 'issue-rules-links section-footer');
-           ruleLinks.append('a').attr('class', 'issue-rules-link').attr('href', '#').html(_t.html('issues.disable_all')).on('click', function (d3_event) {
-             d3_event.preventDefault();
-             context.validator().disableRules(_ruleKeys);
-           });
-           ruleLinks.append('a').attr('class', 'issue-rules-link').attr('href', '#').html(_t.html('issues.enable_all')).on('click', function (d3_event) {
-             d3_event.preventDefault();
-             context.validator().disableRules([]);
-           }); // Update
+           context.ui().closeEditMenu(); // always request to show the edit menu in case the mode needs it
 
-           container = container.merge(containerEnter);
-           container.selectAll('.issue-rules-list').call(drawListItems, _ruleKeys, 'checkbox', 'rule', toggleRule, isRuleEnabled);
+           if (showMenu) context.ui().showEditMenu(point, interactionType);
+           resetProperties();
          }
 
-         function drawListItems(selection, data, type, name, change, active) {
-           var items = selection.selectAll('li').data(data); // Exit
+         function cancelLongPress() {
+           if (_longPressTimeout) window.clearTimeout(_longPressTimeout);
+           _longPressTimeout = null;
+         }
 
-           items.exit().remove(); // Enter
+         function resetProperties() {
+           cancelLongPress();
+           _showMenu = false;
+           _lastInteractionType = null; // don't reset _lastMouseEvent since it might still be useful
+         }
 
-           var enter = items.enter().append('li');
+         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 (name === 'rule') {
-             enter.call(uiTooltip().title(function (d) {
-               return _t.html('issues.' + d + '.tip');
-             }).placement('top'));
-           }
+             if (+e.clientX === 0 && +e.clientY === 0) {
+               d3_event.preventDefault();
+             }
+           });
+           selection.on(_pointerPrefix + 'down.select', pointerdown).on('contextmenu.select', contextmenu);
+           /*if (d3_event && d3_event.shiftKey) {
+               context.surface()
+                   .classed('behavior-multiselect', true);
+           }*/
+         }
+
+         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);
+         };
 
-           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 = {};
+         return behavior;
+       }
 
-             if (d === 'unsquare_way') {
-               params.val = '<span class="square-degrees"></span>';
-             }
+       function operationContinue(context, selectedIDs) {
+         var _entities = selectedIDs.map(function (id) {
+           return context.graph().entity(id);
+         });
 
-             return _t.html('issues.' + d + '.title', params);
-           }); // Update
+         var _geometries = Object.assign({
+           line: [],
+           vertex: []
+         }, utilArrayGroupBy(_entities, function (entity) {
+           return entity.geometry(context.graph());
+         }));
 
-           items = items.merge(enter);
-           items.classed('active', active).selectAll('input').property('checked', active).property('indeterminate', false); // user-configurable square threshold
+         var _vertex = _geometries.vertex.length && _geometries.vertex[0];
 
-           var degStr = corePreferences('validate-square-degrees');
+         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);
+           }) : [];
+         }
 
-           if (degStr === null) {
-             degStr = DEFAULTSQUARE.toString();
-           }
+         var _candidates = candidateWays();
 
-           var span = items.selectAll('.square-degrees');
-           var input = span.selectAll('.square-degrees-input').data([0]); // enter / update
+         var operation = function operation() {
+           var candidate = _candidates[0];
+           context.enter(modeDrawLine(context, candidate.id, context.graph(), 'line', candidate.affix(_vertex.id), true));
+         };
 
-           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.relatedEntityIds = function () {
+           return _candidates.length ? [_candidates[0].id] : [];
+         };
 
-         function changeSquare() {
-           var input = select(this);
-           var degStr = utilGetSetValue(input).trim();
-           var degNum = parseFloat(degStr, 10);
+         operation.available = function () {
+           return _geometries.vertex.length === 1 && _geometries.line.length <= 1 && !context.features().hasHiddenConnections(_vertex, context.graph());
+         };
 
-           if (!isFinite(degNum)) {
-             degNum = DEFAULTSQUARE;
-           } else if (degNum > MAXSQUARE) {
-             degNum = MAXSQUARE;
-           } else if (degNum < MINSQUARE) {
-             degNum = MINSQUARE;
+         operation.disabled = function () {
+           if (_candidates.length === 0) {
+             return 'not_eligible';
+           } else if (_candidates.length > 1) {
+             return 'multiple';
            }
 
-           degNum = Math.round(degNum * 10) / 10; // round to 1 decimal
-
-           degStr = degNum.toString();
-           input.property('value', degStr);
-           corePreferences('validate-square-degrees', degStr);
-           context.validator().reloadUnsquareIssues();
-         }
+           return false;
+         };
 
-         function isRuleEnabled(d) {
-           return context.validator().isRuleEnabled(d);
-         }
+         operation.tooltip = function () {
+           var disable = operation.disabled();
+           return disable ? _t('operations.continue.' + disable) : _t('operations.continue.description');
+         };
 
-         function toggleRule(d3_event, d) {
-           context.validator().toggleRule(d);
-         }
+         operation.annotation = function () {
+           return _t('operations.continue.annotation.line');
+         };
 
-         context.validator().on('validated.uiSectionValidationRules', function () {
-           window.requestIdleCallback(section.reRender);
-         });
-         return section;
+         operation.id = 'continue';
+         operation.keys = [_t('operations.continue.key')];
+         operation.title = _t('operations.continue.title');
+         operation.behavior = behaviorOperation(context).which(operation);
+         return operation;
        }
 
-       function uiSectionValidationStatus(context) {
-         var section = uiSection('issues-status', context).content(renderContent).shouldDisplay(function () {
-           var issues = context.validator().getIssues(getOptions());
-           return issues.length === 0;
-         });
-
-         function getOptions() {
-           return {
-             what: corePreferences('validate-what') || 'edited',
-             where: corePreferences('validate-where') || 'all'
-           };
-         }
+       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 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);
+             return entity.hasInterestingTags() || entity.geometry(context.graph()) !== 'vertex';
+           });
          }
 
-         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
+         var operation = function operation() {
+           var graph = context.graph();
+           var selected = groupEntities(getFilteredIdsToCopy(), graph);
+           var canCopy = [];
+           var skip = {};
+           var entity;
+           var i;
 
-           resetIgnored.exit().remove(); // enter
+           for (i = 0; i < selected.relation.length; i++) {
+             entity = selected.relation[i];
 
-           var resetIgnoredEnter = resetIgnored.enter().append('div').attr('class', 'reset-ignored section-footer');
-           resetIgnoredEnter.append('a').attr('href', '#'); // update
+             if (!skip[entity.id] && entity.isComplete(graph)) {
+               canCopy.push(entity.id);
+               skip = getDescendants(entity.id, graph, skip);
+             }
+           }
 
-           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();
-           });
-         }
+           for (i = 0; i < selected.way.length; i++) {
+             entity = selected.way[i];
 
-         function setNoIssuesText(selection) {
-           var opts = getOptions();
+             if (!skip[entity.id]) {
+               canCopy.push(entity.id);
+               skip = getDescendants(entity.id, graph, skip);
+             }
+           }
 
-           function checkForHiddenIssues(cases) {
-             for (var type in cases) {
-               var hiddenOpts = cases[type];
-               var hiddenIssues = context.validator().getIssues(hiddenOpts);
+           for (i = 0; i < selected.node.length; i++) {
+             entity = selected.node[i];
 
-               if (hiddenIssues.length) {
-                 selection.select('.box .details').html(_t.html('issues.no_issues.hidden_issues.' + type, {
-                   count: hiddenIssues.length.toString()
-                 }));
-                 return;
-               }
+             if (!skip[entity.id]) {
+               canCopy.push(entity.id);
              }
+           }
 
-             selection.select('.box .details').html(_t.html('issues.no_issues.hidden_issues.none'));
+           context.copyIDs(canCopy);
+
+           if (_point && (canCopy.length !== 1 || graph.entity(canCopy[0]).type !== 'node')) {
+             // store the anchor coordinates if copying more than a single node
+             context.copyLonLat(context.projection.invert(_point));
+           } else {
+             context.copyLonLat(null);
            }
+         };
 
-           var messageType;
+         function groupEntities(ids, graph) {
+           var entities = ids.map(function (id) {
+             return graph.entity(id);
+           });
+           return Object.assign({
+             relation: [],
+             way: [],
+             node: []
+           }, utilArrayGroupBy(entities, 'type'));
+         }
 
-           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'
-               }
+         function getDescendants(id, graph, descendants) {
+           var entity = graph.entity(id);
+           var children;
+           descendants = descendants || {};
+
+           if (entity.type === 'relation') {
+             children = entity.members.map(function (m) {
+               return m.id;
              });
+           } else if (entity.type === 'way') {
+             children = entity.nodes;
+           } else {
+             children = [];
            }
 
-           if (opts.what === 'edited' && context.history().difference().summary().length === 0) {
-             messageType = 'no_edits';
+           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 .message').html(_t.html('issues.no_issues.message.' + messageType));
+           return descendants;
          }
 
-         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.available = function () {
+           return getFilteredIdsToCopy().length > 0;
+         };
 
-       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;
-       }
+         operation.disabled = function () {
+           var extent = utilTotalExtent(getFilteredIdsToCopy(), context.graph());
 
-       function uiSettingsCustomData(context) {
-         var dispatch$1 = dispatch('change');
+           if (extent.percentContainedIn(context.map().extent()) < 0.8) {
+             return 'too_large';
+           }
 
-         function render(selection) {
-           var dataLayer = context.layers().layer('data'); // keep separate copies of original and current settings
+           return false;
+         };
 
-           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';
+         operation.availableForKeypress = function () {
+           var selection = window.getSelection && window.getSelection(); // if the user has text selected then let them copy that, not the selected feature
 
-           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;
+           return !selection || !selection.toString();
+         };
 
-             if (files && files.length) {
-               _currSettings.url = '';
-               textSection.select('.field-url').property('value', '');
-               _currSettings.fileList = files;
-             } else {
-               _currSettings.fileList = null;
-             }
+         operation.tooltip = function () {
+           var disable = operation.disabled();
+           return disable ? _t('operations.copy.' + disable, {
+             n: selectedIDs.length
+           }) : _t('operations.copy.description', {
+             n: selectedIDs.length
            });
-           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
+         };
 
-           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);
+         operation.annotation = function () {
+           return _t('operations.copy.annotation', {
+             n: selectedIDs.length
+           });
+         };
 
-           function isSaveDisabled() {
-             return null;
-           } // restore the original url
+         var _point;
 
+         operation.point = function (val) {
+           _point = val;
+           return operation;
+         };
 
-           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
+         operation.id = 'copy';
+         operation.keys = [uiCmd('⌘C')];
+         operation.title = _t('operations.copy.title');
+         operation.behavior = behaviorOperation(context).which(operation);
+         return operation;
+       }
 
+       function operationDisconnect(context, selectedIDs) {
+         var _vertexIDs = [];
+         var _wayIDs = [];
+         var _otherIDs = [];
+         var _actions = [];
+         selectedIDs.forEach(function (id) {
+           var entity = context.entity(id);
 
-           function clickSave() {
-             _currSettings.url = textSection.select('.field-url').property('value').trim(); // one or the other but not both
+           if (entity.type === 'way') {
+             _wayIDs.push(id);
+           } else if (entity.geometry(context.graph()) === 'vertex') {
+             _vertexIDs.push(id);
+           } else {
+             _otherIDs.push(id);
+           }
+         });
 
-             if (_currSettings.url) {
-               _currSettings.fileList = null;
-             }
+         var _coords,
+             _descriptionID = '',
+             _annotationID = 'features';
 
-             if (_currSettings.fileList) {
-               _currSettings.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;
+
+           _vertexIDs.forEach(function (vertexID) {
+             var action = actionDisconnect(vertexID);
+
+             if (_wayIDs.length > 0) {
+               var waysIDsForVertex = _wayIDs.filter(function (wayID) {
+                 var way = context.entity(wayID);
+                 return way.nodes.indexOf(vertexID) !== -1;
+               });
+
+               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
+
+           var sharedActions = [];
+           var sharedNodes = []; // actions for connected nodes
+
+           var unsharedActions = [];
+           var unsharedNodes = [];
+           nodes.forEach(function (node) {
+             var action = actionDisconnect(node.id).limitWays(_wayIDs);
 
-           if (layer) {
-             return layer.enabled();
-           }
+             if (action.disabled(context.graph()) !== 'not_connected') {
+               var count = 0;
 
-           return false;
-         }
+               for (var i in ways) {
+                 var way = ways[i];
 
-         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 (way.nodes.indexOf(node.id) !== -1) {
+                   count += 1;
+                 }
 
-           if (layer) {
-             layer.enabled(enabled);
+                 if (count > 1) break;
+               }
 
-             if (!enabled && (which === 'osm' || which === 'notes')) {
-               context.enter(modeBrowse(context));
+               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.';
 
-         function toggleLayer(which) {
-           setLayer(which, !showsLayer(which));
-         }
+           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;
+             });
 
-         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'));
+             if (_wayIDs.length === 1) {
+               _descriptionID += context.graph().geometry(_wayIDs[0]);
              } else {
-               select(this).call(uiTooltip().title(_t.html('map_data.layers.' + d.id + '.tooltip')).placement('bottom'));
+               _descriptionID += 'separate';
              }
-           });
-           labelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event, d) {
-             toggleLayer(d.id);
-           });
-           labelEnter.append('span').html(function (d) {
-             return _t.html('map_data.layers.' + d.id + '.title');
-           }); // Update
-
-           li.merge(liEnter).classed('active', function (d) {
-             return d.layer.enabled();
-           }).selectAll('input').property('checked', function (d) {
-             return d.layer.enabled();
-           });
+           }
          }
 
-         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', function (d3_event) {
-             d3_event.preventDefault();
-             editCustom();
-           }).call(svgIcon('#iD-icon-more'));
-           liEnter.append('button').attr('class', 'zoom-to-data').call(uiTooltip().title(_t.html('map_data.layers.custom.zoom')).placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left')).on('click', function (d3_event) {
-             if (select(this).classed('disabled')) return;
-             d3_event.preventDefault();
-             d3_event.stopPropagation();
-             dataLayer.fitZoom();
-           }).call(svgIcon('#iD-icon-framed-dot', 'monochrome')); // Update
+             if (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() {
-           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);
+         };
 
-       function uiSectionMapFeatures(context) {
-         var _features = context.features().keys();
+         operation.id = 'disconnect';
+         operation.keys = [_t('operations.disconnect.key')];
+         operation.title = _t('operations.disconnect.title');
+         operation.behavior = behaviorOperation(context).which(operation);
+         return operation;
+       }
 
-         var section = uiSection('map-features', context).label(_t.html('map_data.map_features')).disclosureContent(renderDisclosureContent).expandedByDefault(false);
+       function operationDowngrade(context, selectedIDs) {
+         var _affectedFeatureCount = 0;
 
-         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 _downgradeType = downgradeTypeForEntityIDs(selectedIDs);
 
-           container = container.merge(containerEnter);
-           container.selectAll('.layer-feature-list').call(drawListItems, _features, 'checkbox', 'feature', clickFeature, showsFeature);
-         }
+         var _multi = _affectedFeatureCount === 1 ? 'single' : 'multiple';
 
-         function drawListItems(selection, data, type, name, change, active) {
-           var items = selection.selectAll('li').data(data); // Exit
+         function downgradeTypeForEntityIDs(entityIds) {
+           var downgradeType;
+           _affectedFeatureCount = 0;
 
-           items.exit().remove(); // Enter
+           for (var i in entityIds) {
+             var entityID = entityIds[i];
+             var type = downgradeTypeForEntityID(entityID);
 
-           var enter = items.enter().append('li').call(uiTooltip().title(function (d) {
-             var tip = _t.html(name + '.' + d + '.tooltip');
+             if (type) {
+               _affectedFeatureCount += 1;
 
-             if (autoHiddenFeature(d)) {
-               var msg = showsLayer('osm') ? _t.html('map_data.autohidden') : _t.html('map_data.osmhidden');
-               tip += '<div>' + msg + '</div>';
+               if (downgradeType && type !== downgradeType) {
+                 if (downgradeType !== 'generic' && type !== 'generic') {
+                   downgradeType = 'building_address';
+                 } else {
+                   downgradeType = 'generic';
+                 }
+               } else {
+                 downgradeType = type;
+               }
              }
+           }
 
-             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 autoHiddenFeature(d) {
-           return context.features().autoHidden(d);
-         }
-
-         function showsFeature(d) {
-           return context.features().enabled(d);
+           return downgradeType;
          }
 
-         function clickFeature(d3_event, d) {
-           context.features().toggle(d);
-         }
+         function downgradeTypeForEntityID(entityID) {
+           var graph = context.graph();
+           var entity = graph.entity(entityID);
+           var preset = _mainPresetIndex.match(entity, graph);
+           if (!preset || preset.isFallback()) return null;
 
-         function showsLayer(id) {
-           var layer = context.layers().layer(id);
-           return layer && layer.enabled();
-         } // add listeners
+           if (entity.type === 'node' && preset.id !== 'address' && Object.keys(entity.tags).some(function (key) {
+             return key.match(/^addr:.{1,}/);
+           })) {
+             return 'address';
+           }
 
+           var geometry = entity.geometry(graph);
 
-         context.features().on('change.map_features', section.reRender);
-         return section;
-       }
+           if (geometry === 'area' && entity.tags.building && !preset.tags.building) {
+             return 'building';
+           }
 
-       function uiSectionMapStyleOptions(context) {
-         var section = uiSection('fill-area', context).label(_t.html('map_data.style_options')).disclosureContent(renderDisclosureContent).expandedByDefault(false);
+           if (geometry === 'vertex' && Object.keys(entity.tags).length) {
+             return 'generic';
+           }
 
-         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 null;
          }
 
-         function drawListItems(selection, data, type, name, change, active) {
-           var items = selection.selectAll('li').data(data); // Exit
-
-           items.exit().remove(); // Enter
-
-           var enter = items.enter().append('li').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
+         var buildingKeysToKeep = ['architect', 'building', 'height', 'layer', 'source', 'type', 'wheelchair'];
+         var addressKeysToKeep = ['source'];
 
-           items = items.merge(enter);
-           items.classed('active', active).selectAll('input').property('checked', active).property('indeterminate', false);
-         }
+         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 isActiveFill(d) {
-           return context.map().activeAreaFill() === d;
-         }
+               for (var key in tags) {
+                 if (type === 'address' && addressKeysToKeep.indexOf(key) !== -1) continue;
 
-         function toggleHighlightEdited(d3_event) {
-           d3_event.preventDefault();
-           context.map().toggleHighlightEdited();
-         }
+                 if (type === 'building') {
+                   if (buildingKeysToKeep.indexOf(key) !== -1 || key.match(/^building:.{1,}/) || key.match(/^roof:.{1,}/)) continue;
+                 }
 
-         function setFill(d3_event, d) {
-           context.map().activeAreaFill(d);
-         }
+                 if (type !== 'generic') {
+                   if (key.match(/^addr:.{1,}/) || key.match(/^source:.{1,}/)) continue;
+                 }
 
-         context.map().on('changeHighlighting.ui_style, changeAreaFill.ui_style', section.reRender);
-         return section;
-       }
+                 delete tags[key];
+               }
 
-       function uiSectionPhotoOverlays(context) {
-         var layers = context.layers();
-         var section = uiSection('photo-overlays', context).label(_t.html('photo_overlays.title')).disclosureContent(renderDisclosureContent).expandedByDefault(false);
+               graph = actionChangeTags(entityID, tags)(graph);
+             }
 
-         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);
-         }
+             return graph;
+           }, operation.annotation());
+           context.validator().validate(); // refresh the select mode to enable the delete operation
 
-         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();
-           });
+           context.enter(modeSelect(context, selectedIDs));
+         };
 
-           function layerSupported(d) {
-             return d.layer && d.layer.supported();
-           }
+         operation.available = function () {
+           return _downgradeType;
+         };
 
-           function layerEnabled(d) {
-             return layerSupported(d) && d.layer.enabled();
+         operation.disabled = function () {
+           if (selectedIDs.some(hasWikidataTag)) {
+             return 'has_wikidata_tag';
            }
 
-           var ul = selection.selectAll('.layer-list-photos').data([0]);
-           ul = ul.enter().append('ul').attr('class', 'layer-list layer-list-photos').merge(ul);
-           var li = ul.selectAll('.list-item-photos').data(data);
-           li.exit().remove();
-           var liEnter = li.enter().append('li').attr('class', function (d) {
-             var classes = 'list-item-photos list-item-' + d.id;
-
-             if (d.id === 'mapillary-signs' || d.id === 'mapillary-map-features') {
-               classes += ' indented';
-             }
+           return false;
 
-             return classes;
-           });
-           var labelEnter = liEnter.append('label').each(function (d) {
-             var titleID;
-             if (d.id === 'mapillary-signs') titleID = 'mapillary.signs.tooltip';else if (d.id === 'mapillary') titleID = 'mapillary_images.tooltip';else if (d.id === 'openstreetcam') titleID = 'openstreetcam_images.tooltip';else titleID = d.id.replace(/-/g, '_') + '.tooltip';
-             select(this).call(uiTooltip().title(_t.html(titleID)).placement('top'));
-           });
-           labelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event, d) {
-             toggleLayer(d.id);
-           });
-           labelEnter.append('span').html(function (d) {
-             var id = d.id;
-             if (id === 'mapillary-signs') id = 'photo_overlays.traffic_signs';
-             return _t.html(id.replace(/-/g, '_') + '.title');
-           }); // Update
+           function hasWikidataTag(id) {
+             var entity = context.entity(id);
+             return entity.tags.wikidata && entity.tags.wikidata.trim().length > 0;
+           }
+         };
 
-           li.merge(liEnter).classed('active', layerEnabled).selectAll('input').property('checked', layerEnabled);
-         }
+         operation.tooltip = function () {
+           var disable = operation.disabled();
+           return disable ? _t('operations.downgrade.' + disable + '.' + _multi) : _t('operations.downgrade.description.' + _downgradeType);
+         };
 
-         function drawPhotoTypeItems(selection) {
-           var data = context.photos().allPhotoTypes();
+         operation.annotation = function () {
+           var suffix;
 
-           function typeEnabled(d) {
-             return context.photos().showsPhotoType(d);
+           if (_downgradeType === 'building_address') {
+             suffix = 'generic';
+           } else {
+             suffix = _downgradeType;
            }
 
-           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);
+           return _t('operations.downgrade.annotation.' + suffix, {
+             n: _affectedFeatureCount
            });
-           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);
-         }
+         operation.id = 'downgrade';
+         operation.keys = [uiCmd('⌫')];
+         operation.title = _t('operations.downgrade.title');
+         operation.behavior = behaviorOperation(context).which(operation);
+         return operation;
+       }
 
-         function drawDateFilter(selection) {
-           var data = context.photos().dateFilters();
+       function operationExtract(context, selectedIDs) {
+         var _amount = selectedIDs.length === 1 ? 'single' : 'multiple';
 
-           function filterEnabled(d) {
-             return context.photos().dateFilterValue(d);
+         var _geometries = utilArrayUniq(selectedIDs.map(function (entityID) {
+           return context.graph().hasEntity(entityID) && context.graph().geometry(entityID);
+         }).filter(Boolean));
+
+         var _geometryID = _geometries.length === 1 ? _geometries[0] : 'feature';
+
+         var _extent;
+
+         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-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
+           _extent = _extent ? _extent.extend(entity.extent(graph)) : entity.extent(graph);
+           return actionExtract(entityID, context.projection);
+         }).filter(Boolean);
 
-             li.selectAll('input').each(function (d) {
-               utilGetSetValue(select(this), context.photos().dateFilterValue(d) || '');
+         var operation = function operation() {
+           var combinedAction = function combinedAction(graph) {
+             _actions.forEach(function (action) {
+               graph = action(graph);
              });
-           });
-           li = li.merge(liEnter).classed('active', filterEnabled);
-         }
 
-         function drawUsernameFilter(selection) {
-           function filterEnabled() {
-             return context.photos().usernames();
-           }
+             return graph;
+           };
 
-           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.perform(combinedAction, operation.annotation()); // do the extract
 
-           function usernameValue() {
-             var usernames = context.photos().usernames();
-             if (usernames) return usernames.join('; ');
-             return usernames;
-           }
-         }
+           var extractedNodeIDs = _actions.map(function (action) {
+             return action.getExtractedNodeID();
+           });
 
-         function toggleLayer(which) {
-           setLayer(which, !showsLayer(which));
-         }
+           context.enter(modeSelect(context, extractedNodeIDs));
+         };
 
-         function showsLayer(which) {
-           var layer = layers.layer(which);
+         operation.available = function () {
+           return _actions.length && selectedIDs.length === _actions.length;
+         };
 
-           if (layer) {
-             return layer.enabled();
+         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';
            }
 
            return false;
-         }
+         };
 
-         function setLayer(which, enabled) {
-           var layer = layers.layer(which);
+         operation.tooltip = function () {
+           var disableReason = operation.disabled();
 
-           if (layer) {
-             layer.enabled(enabled);
+           if (disableReason) {
+             return _t('operations.extract.' + disableReason + '.' + _amount);
+           } else {
+             return _t('operations.extract.description.' + _geometryID + '.' + _amount);
            }
-         }
+         };
 
-         context.layers().on('change.uiSectionPhotoOverlays', section.reRender);
-         context.photos().on('change.uiSectionPhotoOverlays', section.reRender);
-         return section;
-       }
+         operation.annotation = function () {
+           return _t('operations.extract.annotation', {
+             n: selectedIDs.length
+           });
+         };
 
-       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.id = 'extract';
+         operation.keys = [_t('operations.extract.key')];
+         operation.title = _t('operations.extract.title');
+         operation.behavior = behaviorOperation(context).which(operation);
+         return operation;
        }
 
-       function uiSectionPrivacy(context) {
-         var section = uiSection('preferences-third-party', context).label(_t.html('preferences.privacy.title')).disclosureContent(renderDisclosureContent);
+       function operationMerge(context, selectedIDs) {
+         var _action = getAction();
 
-         var _showThirdPartyIcons = corePreferences('preferences.privacy.thirdpartyicons') || 'true';
+         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 renderDisclosureContent(selection) {
-           // enter
-           var privacyOptionsListEnter = selection.selectAll('.privacy-options-list').data([0]).enter().append('ul').attr('class', 'layer-list privacy-options-list');
-           var thirdPartyIconsEnter = privacyOptionsListEnter.append('li').attr('class', 'privacy-third-party-icons-item').append('label').call(uiTooltip().title(_t.html('preferences.privacy.third_party_icons.tooltip')).placement('bottom'));
-           thirdPartyIconsEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event) {
-             d3_event.preventDefault();
-             _showThirdPartyIcons = _showThirdPartyIcons === 'true' ? 'false' : 'true';
-             corePreferences('preferences.privacy.thirdpartyicons', _showThirdPartyIcons);
-             update();
-           });
-           thirdPartyIconsEnter.append('span').html(_t.html('preferences.privacy.third_party_icons.description')); // Privacy Policy link
+           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;
+         }
 
-           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();
+         var operation = function operation() {
+           if (operation.disabled()) return;
+           context.perform(_action, operation.annotation());
+           context.validator().validate();
+           var resultIDs = selectedIDs.filter(context.hasEntity);
 
-           function update() {
-             selection.selectAll('.privacy-third-party-icons-item').classed('active', _showThirdPartyIcons === 'true').select('input').property('checked', _showThirdPartyIcons === 'true');
+           if (resultIDs.length > 1) {
+             var interestingIDs = resultIDs.filter(function (id) {
+               return context.entity(id).hasInterestingTags();
+             });
+             if (interestingIDs.length) resultIDs = interestingIDs;
            }
-         }
-
-         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;
-       }
+           context.enter(modeSelect(context, resultIDs));
+         };
 
-       function uiInit(context) {
-         var _initCounter = 0;
-         var _needWidth = {};
+         operation.available = function () {
+           return selectedIDs.length >= 2;
+         };
 
-         var _lastPointerType;
+         operation.disabled = function () {
+           var actionDisabled = _action.disabled(context.graph());
 
-         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
+           if (actionDisabled) return actionDisabled;
+           var osm = context.connection();
 
-             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
+           if (osm && _action.resultingWayNodesLength && _action.resultingWayNodesLength(context.graph()) > osm.maxWayNodes()) {
+             return 'too_many_vertices';
+           }
 
-             d3_event.preventDefault();
-           });
-           var detected = utilDetect(); // only WebKit supports gesture events
+           return false;
+         };
 
-           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.tooltip = function () {
+           var disabled = operation.disabled();
 
-           if ('PointerEvent' in window) {
-             select(window).on('pointerdown.ui pointerup.ui', function (d3_event) {
-               var pointerType = d3_event.pointerType || 'mouse';
+           if (disabled) {
+             if (disabled === 'restriction') {
+               return _t('operations.merge.restriction', {
+                 relation: _mainPresetIndex.item('type/restriction').name()
+               });
+             }
 
-               if (_lastPointerType !== pointerType) {
-                 _lastPointerType = pointerType;
-                 container.attr('pointer', pointerType);
-               }
-             }, true);
-           } else {
-             _lastPointerType = 'mouse';
-             container.attr('pointer', 'mouse');
+             return _t('operations.merge.' + disabled);
            }
 
-           container.attr('lang', _mainLocalizer.localeCode()).attr('dir', _mainLocalizer.textDirection()); // setup fullscreen keybindings (no button shown at this time)
-
-           container.call(uiFullScreen(context));
-           var map = context.map();
-           map.redrawEnable(false); // don't draw until we've set zoom/lat/long
+           return _t('operations.merge.description');
+         };
 
-           map.on('hitMinZoom.ui', function () {
-             ui.flash.iconName('#iD-icon-no').label(_t.html('cannot_zoom'))();
+         operation.annotation = function () {
+           return _t('operations.merge.annotation', {
+             n: selectedIDs.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.
+         };
 
-           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
+         operation.id = 'merge';
+         operation.keys = [_t('operations.merge.key')];
+         operation.title = _t('operations.merge.title');
+         operation.behavior = behaviorOperation(context).which(operation);
+         return operation;
+       }
 
-           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 operationPaste(context) {
+         var _pastePoint;
 
-           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);
+         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);
            });
-           ui.info = uiInfo(context);
-           overMap.call(ui.info);
-           overMap.append('div').attr('class', 'photoviewer').classed('al', true) // 'al'=left,  'ar'=right
-           .classed('hide', true).call(ui.photoviewer);
-           overMap.append('div').attr('class', 'attribution-wrap').attr('dir', 'ltr').call(uiAttribution(context)); // Add footer
-
-           var about = content.append('div').attr('class', 'map-footer');
-           about.append('div').attr('class', 'api-status').call(uiStatus(context));
-           var footer = about.append('div').attr('class', 'map-footer-bar fillD');
-           footer.append('div').attr('class', 'flash-wrap footer-hide');
-           var footerWrap = footer.append('div').attr('class', 'main-footer-wrap footer-show');
-           footerWrap.append('div').attr('class', 'scale-block').call(uiScale(context));
-           var aboutList = footerWrap.append('div').attr('class', 'info-block').append('ul').attr('class', 'map-footer-list');
-           aboutList.append('li').attr('class', 'user-list').call(uiContributors(context));
-           var apiConnections = context.apiConnections();
-
-           if (apiConnections && apiConnections.length > 1) {
-             aboutList.append('li').attr('class', 'source-switch').call(uiSourceSwitch(context).keys(apiConnections));
-           }
 
-           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));
+           for (var id in copies) {
+             var oldEntity = oldGraph.entity(id);
+             var newEntity = copies[id];
 
-           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.
+             extent._extend(oldEntity.extent(oldGraph)); // Exclude child nodes from newIDs if their parent way was also copied.
 
 
-           ui.onResize();
-           map.redrawEnable(true);
-           ui.hash = behaviorHash(context);
-           ui.hash();
+             var parents = context.graph().parentWays(newEntity);
+             var parentCopied = parents.some(function (parent) {
+               return originals.has(parent.id);
+             });
 
-           if (!ui.hash.hadHash) {
-             map.centerZoom([0, 0], 2);
-           } // Bind events
+             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
 
 
-           window.onbeforeunload = function () {
-             return context.save();
-           };
+           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
 
-           window.onunload = function () {
-             context.history().unlock();
-           };
+           context.replace(actionMove(newIDs, delta, projection), operation.annotation());
+           context.enter(modeSelect(context, newIDs));
+         };
 
-           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();
-             }
+         operation.point = function (val) {
+           _pastePoint = val;
+           return operation;
+         };
 
-             var previousBackground = context.background().findSource(corePreferences('background-last-used-toggle'));
+         operation.available = function () {
+           return context.mode().id === 'browse';
+         };
 
-             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
+         operation.disabled = function () {
+           return !context.copyIDs().length;
+         };
 
-             var mode = context.mode();
-             if (mode && /^draw/.test(mode.id)) return;
-             var layer = context.layers().layer('osm');
+         operation.tooltip = function () {
+           var oldGraph = context.copyGraph();
+           var ids = context.copyIDs();
 
-             if (layer) {
-               layer.enabled(!layer.enabled());
+           if (!ids.length) {
+             return _t('operations.paste.nothing_copied');
+           }
 
-               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);
+           return _t('operations.paste.description', {
+             feature: utilDisplayLabel(oldGraph.entity(ids[0]), oldGraph),
+             n: ids.length
            });
-           context.enter(modeBrowse(context));
-
-           if (!_initCounter++) {
-             if (!ui.hash.startWalkthrough) {
-               context.container().call(uiSplash(context)).call(uiRestore(context));
-             }
+         };
 
-             context.container().call(ui.shortcuts);
-           }
+         operation.annotation = function () {
+           var ids = context.copyIDs();
+           return _t('operations.paste.annotation', {
+             n: ids.length
+           });
+         };
 
-           var osm = context.connection();
-           var auth = uiLoading(context).message(_t.html('loading_auth')).blocking(true);
+         operation.id = 'paste';
+         operation.keys = [uiCmd('⌘V')];
+         operation.title = _t('operations.paste.title');
+         return operation;
+       }
 
-           if (osm && auth) {
-             osm.on('authLoading.ui', function () {
-               context.container().call(auth);
-             }).on('authDone.ui', function () {
-               auth.close();
+       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();
+         };
 
-           _initCounter++;
+         function actions(situation) {
+           return selectedIDs.map(function (entityID) {
+             var entity = context.hasEntity(entityID);
+             if (!entity) return null;
 
-           if (ui.hash.startWalkthrough) {
-             ui.hash.startWalkthrough = false;
-             context.container().call(uiIntro(context));
-           }
+             if (situation === 'toolbar') {
+               if (entity.type === 'way' && !entity.isOneWay() && !entity.isSided()) return null;
+             }
 
-           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);
-             };
-           }
+             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 ui = {};
-
-         var _loadPromise; // renders the iD interface into the container node
-
+         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';
+         }
 
-         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.
+         operation.available = function (situation) {
+           return actions(situation).length > 0;
+         };
 
+         operation.disabled = function () {
+           return false;
+         };
 
-         ui.restart = function () {
-           context.keybinding().clear();
-           _loadPromise = null;
-           context.container().selectAll('*').remove();
-           ui.ensureLoaded();
+         operation.tooltip = function () {
+           return _t('operations.reverse.description.' + reverseTypeID());
          };
 
-         ui.lastPointerType = function () {
-           return _lastPointerType;
+         operation.annotation = function () {
+           var acts = actions();
+           return _t('operations.reverse.annotation.' + reverseTypeID(), {
+             n: acts.length
+           });
          };
 
-         ui.svgDefs = svgDefs(context);
-         ui.flash = uiFlash(context);
-         ui.sidebar = uiSidebar(context);
-         ui.photoviewer = uiPhotoviewer(context);
-         ui.shortcuts = uiShortcuts(context);
+         operation.id = 'reverse';
+         operation.keys = [_t('operations.reverse.key')];
+         operation.title = _t('operations.reverse.title');
+         operation.behavior = behaviorOperation(context).which(operation);
+         return operation;
+       }
 
-         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.
+       function operationSplit(context, selectedIDs) {
+         var _vertexIds = selectedIDs.filter(function (id) {
+           return context.graph().geometry(id) === 'vertex';
+         });
 
-           var mapDimensions = utilGetDimensions(context.container().select('.main-content'), true);
-           utilGetDimensions(context.container().select('.sidebar'), true);
+         var _selectedWayIds = selectedIDs.filter(function (id) {
+           var entity = context.graph().hasEntity(id);
+           return entity && entity.type === 'way';
+         });
 
-           if (withPan !== undefined) {
-             map.redrawEnable(false);
-             map.pan(withPan);
-             map.redrawEnable(true);
-           }
+         var _isAvailable = _vertexIds.length > 0 && _vertexIds.length + _selectedWayIds.length === selectedIDs.length;
 
-           map.dimensions(mapDimensions);
-           ui.photoviewer.onMapResize(); // check if header or footer have overflowed
+         var _action = actionSplit(_vertexIds);
 
-           ui.checkOverflow('.top-toolbar');
-           ui.checkOverflow('.map-footer-bar'); // Use outdated code so it works on Explorer
+         var _ways = [];
+         var _geometry = 'feature';
+         var _waysAmount = 'single';
 
-           var resizeWindowEvent = document.createEvent('Event');
-           resizeWindowEvent.initEvent('resizeWindow', true, true);
-           document.dispatchEvent(resizeWindowEvent);
-         }; // Call checkOverflow when resizing or whenever the contents change.
+         var _nodesAmount = _vertexIds.length === 1 ? 'single' : 'multiple';
+
+         if (_isAvailable) {
+           if (_selectedWayIds.length) _action.limitWays(_selectedWayIds);
+           _ways = _action.ways(context.graph());
+           var geometries = {};
 
+           _ways.forEach(function (way) {
+             geometries[way.geometry(context.graph())] = true;
+           });
 
-         ui.checkOverflow = function (selector, reset) {
-           if (reset) {
-             delete _needWidth[selector];
+           if (Object.keys(geometries).length === 1) {
+             _geometry = Object.keys(geometries)[0];
            }
 
-           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;
+           _waysAmount = _ways.length === 1 ? 'single' : 'multiple';
+         }
 
-           if (scrollWidth > clientWidth) {
-             // overflow happening
-             selection.classed('narrow', true);
+         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 (!_needWidth[selector]) {
-               _needWidth[selector] = scrollWidth;
-             }
-           } else if (scrollWidth >= needed) {
-             selection.classed('narrow', false);
-           }
+           var idsToSelect = _vertexIds.concat(difference.extantIDs().filter(function (id) {
+             // filter out relations that may have had member additions
+             return context.entity(id).type === 'way';
+           }));
+
+           context.enter(modeSelect(context, idsToSelect));
          };
 
-         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);
+         operation.relatedEntityIds = function () {
+           return _selectedWayIds.length ? [] : _ways.map(function (way) {
+             return way.id;
+           });
+         };
 
-           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);
+         operation.available = function () {
+           return _isAvailable;
+         };
 
-             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);
-             });
+         operation.disabled = function () {
+           var reason = _action.disabled(context.graph());
+
+           if (reason) {
+             return reason;
+           } else if (selectedIDs.some(context.hasHiddenConnections)) {
+             return 'connected_to_hidden';
            }
+
+           return false;
          };
 
-         var _editMenu = uiEditMenu(context);
+         operation.tooltip = function () {
+           var disable = operation.disabled();
+           if (disable) return _t('operations.split.' + disable);
+           return _t('operations.split.description.' + _geometry + '.' + _waysAmount + '.' + _nodesAmount + '_node');
+         };
 
-         ui.editMenu = function () {
-           return _editMenu;
+         operation.annotation = function () {
+           return _t('operations.split.annotation.' + _geometry, {
+             n: _ways.length
+           });
          };
 
-         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.id = 'split';
+         operation.keys = [_t('operations.split.key')];
+         operation.title = _t('operations.split.title');
+         operation.behavior = behaviorOperation(context).which(operation);
+         return operation;
+       }
 
-           if (!context.map().editableDataEnabled()) return;
-           var surfaceNode = context.surface().node();
+       function operationStraighten(context, selectedIDs) {
+         var _wayIDs = selectedIDs.filter(function (id) {
+           return id.charAt(0) === 'w';
+         });
 
-           if (surfaceNode.focus) {
-             // FF doesn't support it
-             // focus the surface or else clicking off the menu may not trigger modeBrowse
-             surfaceNode.focus();
-           }
+         var _nodeIDs = selectedIDs.filter(function (id) {
+           return id.charAt(0) === 'n';
+         });
 
-           operations.forEach(function (operation) {
-             if (operation.point) operation.point(anchorPoint);
-           });
+         var _amount = (_wayIDs.length ? _wayIDs : _nodeIDs).length === 1 ? 'single' : 'multiple';
 
-           _editMenu.anchorLoc(anchorPoint).triggerType(triggerType).operations(operations); // render the menu
+         var _nodes = utilGetAllNodes(selectedIDs, context.graph());
 
+         var _coords = _nodes.map(function (n) {
+           return n.loc;
+         });
 
-           context.map().supersurface.call(_editMenu);
-         };
+         var _extent = utilTotalExtent(selectedIDs, context.graph());
 
-         ui.closeEditMenu = function () {
-           // remove any existing menu no matter how it was added
-           context.map().supersurface.select('.edit-menu').remove();
-         };
+         var _action = chooseAction();
 
-         var _saveLoading = select(null);
+         var _geometry;
 
-         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();
+         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 = [];
 
-           _saveLoading = select(null);
-         });
-         return ui;
-       }
+             for (var i = 0; i < selectedIDs.length; i++) {
+               var entity = context.entity(selectedIDs[i]);
 
-       function coreContext() {
-         var _this = this;
+               if (entity.type === 'node') {
+                 continue;
+               } else if (entity.type !== 'way' || entity.isClosed()) {
+                 return null; // exit early, can't straighten these
+               }
 
-         var dispatch$1 = dispatch('enter', 'exit', 'change');
-         var context = utilRebind({}, dispatch$1, 'on');
+               startNodeIDs.push(entity.first());
+               endNodeIDs.push(entity.last());
+             } // Remove duplicate end/startNodeIDs (duplicate nodes cannot be at the line end)
 
-         var _deferred = new Set();
 
-         context.version = '2.19.5';
-         context.privacyVersion = '20200407'; // iD will alter the hash so cache the parameters intended to setup the session
+             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)
 
-         context.initialHashParams = window.location.hash ? utilStringQs(window.location.hash) : {};
-         context.isFirstSession = !corePreferences('sawSplash') && !corePreferences('sawPrivacyVersion');
-         /* Changeset */
-         // An osmChangeset object. Not loaded until needed.
+             if (utilArrayDifference(startNodeIDs, endNodeIDs).length + utilArrayDifference(endNodeIDs, startNodeIDs).length !== 2) return null; // Ensure path contains at least 3 unique nodes
 
-         context.changeset = null;
-         var _defaultChangesetComment = context.initialHashParams.comment;
-         var _defaultChangesetSource = context.initialHashParams.source;
-         var _defaultChangesetHashtags = context.initialHashParams.hashtags;
+             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
 
-         context.defaultChangesetComment = function (val) {
-           if (!arguments.length) return _defaultChangesetComment;
-           _defaultChangesetComment = val;
-           return context;
-         };
+             if (_nodeIDs.length === 2 && (wayNodeIDs.indexOf(_nodeIDs[0]) === -1 || wayNodeIDs.indexOf(_nodeIDs[1]) === -1)) return null;
 
-         context.defaultChangesetSource = function (val) {
-           if (!arguments.length) return _defaultChangesetSource;
-           _defaultChangesetSource = val;
-           return context;
-         };
+             if (_nodeIDs.length) {
+               // If we're only straightenting between two points, we only need that extent visible
+               _extent = utilTotalExtent(_nodeIDs, context.graph());
+             }
 
-         context.defaultChangesetHashtags = function (val) {
-           if (!arguments.length) return _defaultChangesetHashtags;
-           _defaultChangesetHashtags = val;
-           return context;
-         };
-         /* Document title */
+             _geometry = 'line';
+             return actionStraightenWay(selectedIDs, context.projection);
+           }
 
-         /* (typically shown as the label for the browser window/tab) */
-         // If true, iD will update the title based on what the user is doing
+           return null;
+         }
 
+         function operation() {
+           if (!_action) return;
+           context.perform(_action, operation.annotation());
+           window.setTimeout(function () {
+             context.validator().validate();
+           }, 300); // after any transition
+         }
 
-         var _setsDocumentTitle = true;
+         operation.available = function () {
+           return Boolean(_action);
+         };
 
-         context.setsDocumentTitle = function (val) {
-           if (!arguments.length) return _setsDocumentTitle;
-           _setsDocumentTitle = val;
-           return context;
-         }; // The part of the title that is always the same
+         operation.disabled = function () {
+           var reason = _action.disabled(context.graph());
 
+           if (reason) {
+             return reason;
+           } else if (_extent.percentContainedIn(context.map().extent()) < 0.8) {
+             return 'too_large';
+           } else if (someMissing()) {
+             return 'not_downloaded';
+           } else if (selectedIDs.some(context.hasHiddenConnections)) {
+             return 'connected_to_hidden';
+           }
 
-         var _documentTitleBase = document.title;
+           return false;
 
-         context.documentTitleBase = function (val) {
-           if (!arguments.length) return _documentTitleBase;
-           _documentTitleBase = val;
-           return context;
-         };
-         /* User interface and keybinding */
+           function someMissing() {
+             if (context.inIntro()) return false;
+             var osm = context.connection();
 
+             if (osm) {
+               var missing = _coords.filter(function (loc) {
+                 return !osm.isDataLoaded(loc);
+               });
 
-         var _ui;
+               if (missing.length) {
+                 missing.forEach(function (loc) {
+                   context.loadTileAtLoc(loc);
+                 });
+                 return true;
+               }
+             }
 
-         context.ui = function () {
-           return _ui;
+             return false;
+           }
          };
 
-         context.lastPointerType = function () {
-           return _ui.lastPointerType();
+         operation.tooltip = function () {
+           var disable = operation.disabled();
+           return disable ? _t('operations.straighten.' + disable + '.' + _amount) : _t('operations.straighten.description.' + _geometry + (_wayIDs.length === 1 ? '' : 's'));
          };
 
-         var _keybinding = utilKeybinding('context');
+         operation.annotation = function () {
+           return _t('operations.straighten.annotation.' + _geometry, {
+             n: _wayIDs.length ? _wayIDs.length : _nodeIDs.length
+           });
+         };
 
-         context.keybinding = function () {
-           return _keybinding;
+         operation.id = 'straighten';
+         operation.keys = [_t('operations.straighten.key')];
+         operation.title = _t('operations.straighten.title');
+         operation.behavior = behaviorOperation(context).which(operation);
+         return operation;
+       }
+
+       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
+       });
+
+       function modeSelect(context, selectedIDs) {
+         var mode = {
+           id: 'select',
+           button: 'browse'
          };
+         var keybinding = utilKeybinding('select');
 
-         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 _breatheBehavior = behaviorBreathe();
 
-         var _connection = services.osm;
+         var _modeDragNode = modeDragNode(context);
 
-         var _history;
+         var _selectBehavior;
 
-         var _validator;
+         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.
 
-         var _uploader;
+         var _focusedParentWayId;
 
-         context.connection = function () {
-           return _connection;
-         };
+         var _focusedVertexIds;
 
-         context.history = function () {
-           return _history;
-         };
+         function singular() {
+           if (selectedIDs && selectedIDs.length === 1) {
+             return context.hasEntity(selectedIDs[0]);
+           }
+         }
 
-         context.validator = function () {
-           return _validator;
-         };
+         function selectedEntities() {
+           return selectedIDs.map(function (id) {
+             return context.hasEntity(id);
+           }).filter(Boolean);
+         }
 
-         context.uploader = function () {
-           return _uploader;
-         };
-         /* Connection */
+         function checkSelectedIDs() {
+           var ids = [];
 
+           if (Array.isArray(selectedIDs)) {
+             ids = selectedIDs.filter(function (id) {
+               return context.hasEntity(id);
+             });
+           }
 
-         context.preauth = function (options) {
-           if (_connection) {
-             _connection["switch"](options);
+           if (!ids.length) {
+             context.enter(modeBrowse(context));
+             return false;
+           } else if (selectedIDs.length > 1 && ids.length === 1 || selectedIDs.length === 1 && ids.length > 1) {
+             // switch between single- and multi-select UI
+             context.enter(modeSelect(context, ids));
+             return false;
            }
 
-           return context;
-         };
-         /* connection options for source switcher (optional) */
+           selectedIDs = ids;
+           return true;
+         } // find the parent ways for nextVertex, previousVertex, and selectParent
 
 
-         var _apiConnections;
+         function parentWaysIdsOfSelection(onlyCommonParents) {
+           var graph = context.graph();
+           var parents = [];
 
-         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
+           for (var i = 0; i < selectedIDs.length; i++) {
+             var entity = context.hasEntity(selectedIDs[i]);
 
+             if (!entity || entity.geometry(graph) !== 'vertex') {
+               return []; // selection includes some non-vertices
+             }
 
-         context.locale = function (locale) {
-           if (!arguments.length) return _mainLocalizer.localeCode();
-           _mainLocalizer.preferredLocaleCodes(locale);
-           return context;
-         };
+             var currParents = graph.parentWays(entity).map(function (w) {
+               return w.id;
+             });
 
-         function afterLoad(cid, callback) {
-           return function (err, result) {
-             if (err) {
-               // 400 Bad Request, 401 Unauthorized, 403 Forbidden..
-               if (err.status === 400 || err.status === 401 || err.status === 403) {
-                 if (_connection) {
-                   _connection.logout();
-                 }
-               }
+             if (!parents.length) {
+               parents = currParents;
+               continue;
+             }
 
-               if (typeof callback === 'function') {
-                 callback(err);
-               }
+             parents = (onlyCommonParents ? utilArrayIntersection : utilArrayUnion)(parents, currParents);
 
-               return;
-             } else if (_connection && _connection.getConnectionId() !== cid) {
-               if (typeof callback === 'function') {
-                 callback({
-                   message: 'Connection Switched',
-                   status: -1
-                 });
-               }
+             if (!parents.length) {
+               return [];
+             }
+           }
 
-               return;
-             } else {
-               _history.merge(result.data, result.extent);
+           return parents;
+         } // find the child nodes for selected ways
 
-               if (typeof callback === 'function') {
-                 callback(err, result);
-               }
 
-               return;
+         function childNodeIdsOfSelection(onlyCommon) {
+           var graph = context.graph();
+           var childs = [];
+
+           for (var i = 0; i < selectedIDs.length; i++) {
+             var entity = context.hasEntity(selectedIDs[i]);
+
+             if (!entity || !['area', 'line'].includes(entity.geometry(graph))) {
+               return []; // selection includes non-area/non-line
              }
-           };
-         }
 
-         context.loadTiles = function (projection, callback) {
-           var handle = window.requestIdleCallback(function () {
-             _deferred["delete"](handle);
+             var currChilds = graph.childNodes(entity).map(function (node) {
+               return node.id;
+             });
 
-             if (_connection && context.editableDataEnabled()) {
-               var cid = _connection.getConnectionId();
+             if (!childs.length) {
+               childs = currChilds;
+               continue;
+             }
 
-               _connection.loadTiles(projection, afterLoad(cid, callback));
+             childs = (onlyCommon ? utilArrayIntersection : utilArrayUnion)(childs, currChilds);
+
+             if (!childs.length) {
+               return [];
              }
-           });
+           }
 
-           _deferred.add(handle);
-         };
+           return childs;
+         }
 
-         context.loadTileAtLoc = function (loc, callback) {
-           var handle = window.requestIdleCallback(function () {
-             _deferred["delete"](handle);
+         function checkFocusedParent() {
+           if (_focusedParentWayId) {
+             var parents = parentWaysIdsOfSelection(true);
+             if (parents.indexOf(_focusedParentWayId) === -1) _focusedParentWayId = null;
+           }
+         }
 
-             if (_connection && context.editableDataEnabled()) {
-               var cid = _connection.getConnectionId();
+         function parentWayIdForVertexNavigation() {
+           var parentIds = parentWaysIdsOfSelection(true);
 
-               _connection.loadTileAtLoc(loc, afterLoad(cid, callback));
-             }
-           });
+           if (_focusedParentWayId && parentIds.indexOf(_focusedParentWayId) !== -1) {
+             // prefer the previously seen parent
+             return _focusedParentWayId;
+           }
 
-           _deferred.add(handle);
+           return parentIds.length ? parentIds[0] : null;
+         }
+
+         mode.selectedIDs = function (val) {
+           if (!arguments.length) return selectedIDs;
+           selectedIDs = val;
+           return mode;
          };
 
-         context.loadEntity = function (entityID, callback) {
-           if (_connection) {
-             var cid = _connection.getConnectionId();
+         mode.zoomToSelected = function () {
+           context.map().zoomToEase(selectedEntities());
+         };
 
-             _connection.loadEntity(entityID, afterLoad(cid, callback));
-           }
+         mode.newFeature = function (val) {
+           if (!arguments.length) return _newFeature;
+           _newFeature = val;
+           return mode;
          };
 
-         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;
+         mode.selectBehavior = function (val) {
+           if (!arguments.length) return _selectBehavior;
+           _selectBehavior = val;
+           return mode;
+         };
 
-             if (zoomTo !== false) {
-               var entity = result.data.find(function (e) {
-                 return e.id === entityID;
-               });
+         mode.follow = function (val) {
+           if (!arguments.length) return _follow;
+           _follow = val;
+           return mode;
+         };
 
-               if (entity) {
-                 _map.zoomTo(entity);
-               }
+         function loadOperations() {
+           _operations.forEach(function (operation) {
+             if (operation.behavior) {
+               context.uninstall(operation.behavior);
              }
            });
 
-           _map.on('drawn.zoomToEntity', function () {
-             if (!context.hasEntity(entityID)) 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();
+           });
 
-             _map.on('drawn.zoomToEntity', null);
+           _operations.forEach(function (operation) {
+             if (operation.behavior) {
+               context.install(operation.behavior);
+             }
+           }); // remove any displayed menu
 
-             context.on('enter.zoomToEntity', null);
-             context.enter(modeSelect(context, [entityID]));
-           });
 
-           context.on('enter.zoomToEntity', function () {
-             if (_mode.id !== 'browse') {
-               _map.on('drawn.zoomToEntity', null);
+           context.ui().closeEditMenu();
+         }
 
-               context.on('enter.zoomToEntity', null);
-             }
-           });
+         mode.operations = function () {
+           return _operations;
          };
 
-         var _minEditableZoom = 16;
+         mode.enter = function () {
+           if (!checkSelectedIDs()) return;
+           context.features().forceVisible(selectedIDs);
 
-         context.minEditableZoom = function (val) {
-           if (!arguments.length) return _minEditableZoom;
-           _minEditableZoom = val;
+           _modeDragNode.restoreSelectedIDs(selectedIDs);
 
-           if (_connection) {
-             _connection.tileZoom(val);
+           loadOperations();
+
+           if (!_behaviors.length) {
+             if (!_selectBehavior) _selectBehavior = behaviorSelect(context);
+             _behaviors = [behaviorPaste(context), _breatheBehavior, behaviorHover(context).on('hover', context.ui().sidebar.hoverModeSelect), _selectBehavior, behaviorLasso(context), _modeDragNode.behavior, modeDragNote(context).behavior];
            }
 
-           return context;
-         }; // String length limits in Unicode characters, not JavaScript UTF-16 code units
+           _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'], 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
 
-         context.maxCharsForTagKey = function () {
-           return 255;
-         };
+             selectElements();
+           }).on('undone.select', checkSelectedIDs).on('redone.select', checkSelectedIDs);
+           context.map().on('drawn.select', selectElements).on('crossEditableZoom.select', function () {
+             selectElements();
 
-         context.maxCharsForTagValue = function () {
-           return 255;
-         };
+             _breatheBehavior.restartIfNeeded(context.surface());
+           });
+           context.map().doubleUpHandler().on('doubleUp.modeSelect', didDoubleUp);
+           selectElements();
 
-         context.maxCharsForRelationRole = function () {
-           return 255;
-         };
+           if (_follow) {
+             var extent = geoExtent();
+             var graph = context.graph();
+             selectedIDs.forEach(function (id) {
+               var entity = context.entity(id);
 
-         function cleanOsmString(val, maxChars) {
-           // be lenient with input
-           if (val === undefined || val === null) {
-             val = '';
-           } else {
-             val = val.toString();
-           } // remove whitespace
+               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
 
+             _follow = false;
+           }
 
-           val = val.trim(); // use the canonical form of the string
+           function nudgeSelection(delta) {
+             return function () {
+               // prevent nudging during low zoom selection
+               if (!context.map().withinEditableZoom()) return;
+               var moveOp = operationMove(context, selectedIDs);
 
-           if (val.normalize) val = val.normalize('NFC'); // trim to the number of allowed characters
+               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();
+               }
+             };
+           }
 
-           return utilUnicodeCharsTruncated(val, maxChars);
-         }
+           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.cleanTagKey = function (val) {
-           return cleanOsmString(val, context.maxCharsForTagKey());
-         };
+               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.cleanTagValue = function (val) {
-           return cleanOsmString(val, context.maxCharsForTagValue());
-         };
+               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';
+                 }
 
-         context.cleanRelationRole = function (val) {
-           return cleanOsmString(val, context.maxCharsForRelationRole());
-         };
-         /* History */
+                 return false;
 
+                 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);
+                 }
 
-         var _inIntro = false;
+                 function someMissing() {
+                   if (context.inIntro()) return false;
+                   var osm = context.connection();
 
-         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 (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.save = function () {
-           // no history save, no message onbeforeunload
-           if (_inIntro || context.container().select('.modal').size()) return;
-           var canSave;
+                   return false;
+                 }
 
-           if (_mode && _mode.id === 'save') {
-             canSave = false; // Attempt to prevent user from creating duplicate changes - see #5200
+                 function incompleteRelation(id) {
+                   var entity = context.entity(id);
+                   return entity.type === 'relation' && !entity.isComplete(context.graph());
+                 }
+               }
 
-             if (services.osm && services.osm.isChangesetInflight()) {
-               _history.clearSaved();
+               var disabled = scalingDisabled();
 
-               return;
+               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();
+               }
+             };
+           }
+
+           function didDoubleUp(d3_event, loc) {
+             if (!context.map().withinEditableZoom()) return;
+             var target = select(d3_event.target);
+             var datum = target.datum();
+             var entity = datum && datum.properties && datum.properties.entity;
+             if (!entity) return;
+
+             if (entity instanceof osmWay && target.classed('target')) {
+               var choice = geoChooseEdge(context.graph().childNodes(entity), loc, context.projection);
+               var prev = entity.nodes[choice.index - 1];
+               var next = entity.nodes[choice.index];
+               context.perform(actionAddMidpoint({
+                 loc: choice.loc,
+                 edge: [prev, next]
+               }, osmNode()), _t('operations.add.annotation.vertex'));
+             } else if (entity.type === 'midpoint') {
+               context.perform(actionAddMidpoint({
+                 loc: entity.loc,
+                 edge: entity.edge
+               }, osmNode()), _t('operations.add.annotation.vertex'));
              }
-           } else {
-             canSave = context.selectedIDs().every(function (id) {
-               var entity = context.hasEntity(id);
-               return entity && !entity.isDegenerate();
-             });
            }
 
-           if (canSave) {
-             _history.save();
+           function selectElements() {
+             if (!checkSelectedIDs()) return;
+             var surface = context.surface();
+             surface.selectAll('.selected-member').classed('selected-member', false);
+             surface.selectAll('.selected').classed('selected', false);
+             surface.selectAll('.related').classed('related', false); // reload `_focusedParentWayId` based on the current selection
+
+             checkFocusedParent();
+
+             if (_focusedParentWayId) {
+               surface.selectAll(utilEntitySelector([_focusedParentWayId])).classed('related', true);
+             }
+
+             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);
+             }
            }
 
-           if (_history.hasChanges()) {
-             return _t('save.unsaved_changes');
+           function esc() {
+             if (context.container().select('.combobox').size()) return;
+             context.enter(modeBrowse(context));
            }
-         }; // Debounce save, since it's a synchronous localStorage write,
-         // and history changes can happen frequently (e.g. when dragging).
 
+           function firstVertex(d3_event) {
+             d3_event.preventDefault();
+             var entity = singular();
+             var parentId = parentWayIdForVertexNavigation();
+             var way;
 
-         context.debouncedSave = debounce(context.save, 350);
+             if (entity && entity.type === 'way') {
+               way = entity;
+             } else if (parentId) {
+               way = context.entity(parentId);
+             }
 
-         function withDebouncedSave(fn) {
-           return function () {
-             var result = fn.apply(_history, arguments);
-             context.debouncedSave();
-             return result;
-           };
-         }
-         /* Graph */
+             _focusedParentWayId = way && way.id;
 
+             if (way) {
+               context.enter(mode.selectedIDs([way.first()]).follow(true));
+             }
+           }
 
-         context.hasEntity = function (id) {
-           return _history.graph().hasEntity(id);
-         };
+           function lastVertex(d3_event) {
+             d3_event.preventDefault();
+             var entity = singular();
+             var parentId = parentWayIdForVertexNavigation();
+             var way;
 
-         context.entity = function (id) {
-           return _history.graph().entity(id);
-         };
-         /* Modes */
+             if (entity && entity.type === 'way') {
+               way = entity;
+             } else if (parentId) {
+               way = context.entity(parentId);
+             }
 
+             _focusedParentWayId = way && way.id;
 
-         var _mode;
+             if (way) {
+               context.enter(mode.selectedIDs([way.last()]).follow(true));
+             }
+           }
 
-         context.mode = function () {
-           return _mode;
-         };
+           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;
 
-         context.enter = function (newMode) {
-           if (_mode) {
-             _mode.exit();
+             if (curr > 0) {
+               index = curr - 1;
+             } else if (way.isClosed()) {
+               index = length - 2;
+             }
 
-             dispatch$1.call('exit', _this, _mode);
+             if (index !== -1) {
+               context.enter(mode.selectedIDs([way.nodes[index]]).follow(true));
+             }
            }
 
-           _mode = newMode;
+           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;
 
-           _mode.enter();
+             if (curr < length - 1) {
+               index = curr + 1;
+             } else if (way.isClosed()) {
+               index = 0;
+             }
 
-           dispatch$1.call('enter', _this, _mode);
-         };
+             if (index !== -1) {
+               context.enter(mode.selectedIDs([way.nodes[index]]).follow(true));
+             }
+           }
 
-         context.selectedIDs = function () {
-           return _mode && _mode.selectedIDs && _mode.selectedIDs() || [];
-         };
+           function focusNextParent(d3_event) {
+             d3_event.preventDefault();
+             var parents = parentWaysIdsOfSelection(true);
+             if (!parents || parents.length < 2) return;
+             var index = parents.indexOf(_focusedParentWayId);
 
-         context.activeID = function () {
-           return _mode && _mode.activeID && _mode.activeID();
+             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);
+
+             if (_focusedParentWayId) {
+               surface.selectAll(utilEntitySelector([_focusedParentWayId])).classed('related', true);
+             }
+           }
+
+           function selectParent(d3_event) {
+             d3_event.preventDefault();
+             var currentSelectedIds = mode.selectedIDs();
+             var parentIds = _focusedParentWayId ? [_focusedParentWayId] : parentWaysIdsOfSelection(false);
+             if (!parentIds.length) return;
+             context.enter(mode.selectedIDs(parentIds)); // set this after re-entering the selection since we normally want it cleared on exit
+
+             _focusedVertexIds = currentSelectedIds;
+           }
+
+           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));
+           }
          };
 
-         var _selectedNoteID;
+         mode.exit = function () {
+           // we could enter the mode multiple times but it's only new the first time
+           _newFeature = false;
+           _focusedVertexIds = null;
 
-         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
+           _operations.forEach(function (operation) {
+             if (operation.behavior) {
+               context.uninstall(operation.behavior);
+             }
+           });
 
+           _operations = [];
 
-         var _selectedErrorID;
+           _behaviors.forEach(context.uninstall);
 
-         context.selectedErrorID = function (errorID) {
-           if (!arguments.length) return _selectedErrorID;
-           _selectedErrorID = errorID;
-           return context;
+           select(document).call(keybinding.unbind);
+           context.ui().closeEditMenu();
+           context.history().on('change.select', null).on('undone.select', null).on('redone.select', null);
+           var surface = context.surface();
+           surface.selectAll('.selected-member').classed('selected-member', false);
+           surface.selectAll('.selected').classed('selected', false);
+           surface.selectAll('.highlighted').classed('highlighted', false);
+           surface.selectAll('.related').classed('related', false);
+           context.map().on('drawn.select', null);
+           context.ui().sidebar.hide();
+           context.features().forceVisible([]);
+           var entity = singular();
+
+           if (_newFeature && entity && entity.type === 'relation' && // no tags
+           Object.keys(entity.tags).length === 0 && // no parent relations
+           context.graph().parentRelations(entity).length === 0 && ( // no members or one member with no role
+           entity.members.length === 0 || entity.members.length === 1 && !entity.members[0].role)) {
+             // the user added this relation but didn't edit it at all, so just delete it
+             var deleteAction = actionDeleteRelation(entity.id, true
+             /* don't delete untagged members */
+             );
+             context.perform(deleteAction, _t('operations.delete.annotation.relation'));
+           }
          };
-         /* Behaviors */
 
+         return mode;
+       }
 
-         context.install = function (behavior) {
-           return context.surface().call(behavior);
+       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';
+             });
+           }
+         }
+
+         lasso.extent = function () {
+           return lasso.coordinates.reduce(function (extent, point) {
+             return extent.extend(geoExtent(point));
+           }, geoExtent());
          };
 
-         context.uninstall = function (behavior) {
-           return context.surface().call(behavior.off);
+         lasso.p = function (_) {
+           if (!arguments.length) return lasso;
+           lasso.coordinates.push(_);
+           draw();
+           return lasso;
          };
-         /* Copy/Paste */
-
 
-         var _copyGraph;
+         lasso.close = function () {
+           if (group) {
+             group.call(uiToggle(false, function () {
+               select(this).remove();
+             }));
+           }
 
-         context.copyGraph = function () {
-           return _copyGraph;
+           context.container().classed('lasso', false);
          };
 
-         var _copyIDs = [];
+         return lasso;
+       }
 
-         context.copyIDs = function (val) {
-           if (!arguments.length) return _copyIDs;
-           _copyIDs = val;
-           _copyGraph = _history.graph();
-           return context;
-         };
+       function behaviorLasso(context) {
+         // use pointer events on supported platforms; fallback to mouse events
+         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-         var _copyLonLat;
+         var behavior = function behavior(selection) {
+           var lasso;
 
-         context.copyLonLat = function (val) {
-           if (!arguments.length) return _copyLonLat;
-           _copyLonLat = val;
-           return context;
-         };
-         /* Background */
+           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();
+             }
+           }
 
-         var _background;
+           function pointermove() {
+             if (!lasso) {
+               lasso = uiLasso(context);
+               context.surface().call(lasso);
+             }
 
-         context.background = function () {
-           return _background;
-         };
-         /* Features */
+             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 _features;
+           function lassoed() {
+             if (!lasso) return [];
+             var graph = context.graph();
+             var limitToNodes;
 
-         context.features = function () {
-           return _features;
-         };
+             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.hasHiddenConnections = function (id) {
-           var graph = _history.graph();
+             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 entity = graph.entity(id);
-           return _features.hasHiddenConnections(entity, graph);
-         };
-         /* Photos */
+             intersects.sort(function (node1, node2) {
+               var parents1 = graph.parentWays(node1);
+               var parents2 = graph.parentWays(node2);
 
+               if (parents1.length && parents2.length) {
+                 // both nodes are vertices
+                 var sharedParents = utilArrayIntersection(parents1, parents2);
 
-         var _photos;
+                 if (sharedParents.length) {
+                   var sharedParentNodes = sharedParents[0].nodes; // vertices are members of the same way; sort them in their listed order
 
-         context.photos = function () {
-           return _photos;
-         };
-         /* Map */
+                   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 _map;
+               return node1.loc[0] - node2.loc[0];
+             });
+             return intersects.map(function (entity) {
+               return entity.id;
+             });
+           }
 
-         context.map = function () {
-           return _map;
-         };
+           function pointerup() {
+             select(window).on(_pointerPrefix + 'move.lasso', null).on(_pointerPrefix + 'up.lasso', null);
+             if (!lasso) return;
+             var ids = lassoed();
+             lasso.close();
 
-         context.layers = function () {
-           return _map.layers();
-         };
+             if (ids.length) {
+               context.enter(modeSelect(context, ids));
+             }
+           }
 
-         context.surface = function () {
-           return _map.surface;
+           selection.on(_pointerPrefix + 'down.lasso', pointerdown);
          };
 
-         context.editableDataEnabled = function () {
-           return _map.editableDataEnabled();
+         behavior.off = function (selection) {
+           selection.on(_pointerPrefix + 'down.lasso', null);
          };
 
-         context.surfaceRect = function () {
-           return _map.surface.node().getBoundingClientRect();
-         };
+         return behavior;
+       }
 
-         context.editable = function () {
-           // don't allow editing during save
-           var mode = context.mode();
-           if (!mode || mode.id === 'save') return false;
-           return _map.editableDataEnabled();
+       function modeBrowse(context) {
+         var mode = {
+           button: 'browse',
+           id: 'browse',
+           title: _t('modes.browse.title'),
+           description: _t('modes.browse.description')
          };
-         /* Debug */
+         var sidebar;
 
+         var _selectBehavior;
 
-         var _debugFlags = {
-           tile: false,
-           // tile boundaries
-           collision: false,
-           // label collision bounding boxes
-           imagery: false,
-           // imagery bounding polygons
-           target: false,
-           // touch targets
-           downloaded: false // downloaded data from osm
+         var _behaviors = [];
 
+         mode.selectBehavior = function (val) {
+           if (!arguments.length) return _selectBehavior;
+           _selectBehavior = val;
+           return mode;
          };
 
-         context.debugFlags = function () {
-           return _debugFlags;
-         };
+         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.getDebug = function (flag) {
-           return flag && _debugFlags[flag];
-         };
+           _behaviors.forEach(context.install); // Get focus on the body.
 
-         context.setDebug = function (flag, val) {
-           if (arguments.length === 1) val = true;
-           _debugFlags[flag] = val;
-           dispatch$1.call('change');
-           return context;
-         };
-         /* Container */
 
+           if (document.activeElement && document.activeElement.blur) {
+             document.activeElement.blur();
+           }
 
-         var _container = select(null);
+           if (sidebar) {
+             context.ui().sidebar.show(sidebar);
+           } else {
+             context.ui().sidebar.select(null);
+           }
+         };
 
-         context.container = function (val) {
-           if (!arguments.length) return _container;
-           _container = val;
+         mode.exit = function () {
+           context.ui().sidebar.hover.cancel();
 
-           _container.classed('ideditor', true);
+           _behaviors.forEach(context.uninstall);
 
-           return context;
+           if (sidebar) {
+             context.ui().sidebar.hide();
+           }
          };
 
-         context.containerNode = function (val) {
-           if (!arguments.length) return context.container().node();
-           context.container(select(val));
-           return context;
+         mode.sidebar = function (_) {
+           if (!arguments.length) return sidebar;
+           sidebar = _;
+           return mode;
          };
 
-         var _embed;
-
-         context.embed = function (val) {
-           if (!arguments.length) return _embed;
-           _embed = val;
-           return context;
+         mode.operations = function () {
+           return [operationPaste(context)];
          };
-         /* Assets */
 
+         return mode;
+       }
 
-         var _assetPath = '';
-
-         context.assetPath = function (val) {
-           if (!arguments.length) return _assetPath;
-           _assetPath = val;
-           _mainFileFetcher.assetPath(val);
-           return context;
-         };
+       function behaviorAddWay(context) {
+         var dispatch = dispatch$8('start', 'startFromWay', 'startFromNode');
+         var draw = behaviorDraw(context);
 
-         var _assetMap = {};
+         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.assetMap = function (val) {
-           if (!arguments.length) return _assetMap;
-           _assetMap = val;
-           _mainFileFetcher.assetMap(val);
-           return context;
+         behavior.off = function (surface) {
+           surface.call(draw.off);
          };
 
-         context.asset = function (val) {
-           if (/^http(s)?:\/\//i.test(val)) return val;
-           var filename = _assetPath + val;
-           return _assetMap[filename] || filename;
+         behavior.cancel = function () {
+           window.setTimeout(function () {
+             context.map().dblclickZoomEnable(true);
+           }, 1000);
+           context.enter(modeBrowse(context));
          };
 
-         context.imagePath = function (val) {
-           return context.asset("img/".concat(val));
-         };
-         /* reset (aka flush) */
+         return utilRebind(behavior, dispatch, 'on');
+       }
 
+       function behaviorHash(context) {
+         // cached window.location.hash
+         var _cachedHash = null; // allowable latitude range
 
-         context.reset = context.flush = function () {
-           context.debouncedSave.cancel();
-           Array.from(_deferred).forEach(function (handle) {
-             window.cancelIdleCallback(handle);
+         var _latitudeLimit = 90 - 1e-8;
 
-             _deferred["delete"](handle);
+         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);
            });
-           Object.values(services).forEach(function (service) {
-             if (service && typeof service.reset === 'function') {
-               service.reset(context);
-             }
+
+           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);
+         }
+
+         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.changeset = null;
 
-           _validator.reset();
+           if (selected.length) {
+             var firstLabel = utilDisplayLabel(context.entity(selected[0]), context.graph());
 
-           _features.reset();
+             if (selected.length > 1) {
+               contextual = _t('title.labeled_and_more', {
+                 labeled: firstLabel,
+                 count: selected.length - 1
+               });
+             } else {
+               contextual = firstLabel;
+             }
 
-           _history.reset();
+             titleID = 'context';
+           }
 
-           _uploader.reset(); // don't leave stale state in the inspector
+           if (includeChangeCount) {
+             changeCount = context.history().difference().summary().length;
 
+             if (changeCount > 0) {
+               titleID = contextual ? 'changes_context' : 'changes';
+             }
+           }
 
-           context.container().select('.inspector-wrap *').remove();
-           return context;
-         };
-         /* Projections */
+           if (titleID) {
+             return _t('title.format.' + titleID, {
+               changes: changeCount,
+               base: baseTitle,
+               context: contextual
+             });
+           }
 
+           return baseTitle;
+         }
 
-         context.projection = geoRawMercator();
-         context.curtainProjection = geoRawMercator();
-         /* Init */
+         function updateTitle(includeChangeCount) {
+           if (!context.setsDocumentTitle()) return;
+           var newTitle = computedTitle(includeChangeCount);
 
-         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 (document.title !== newTitle) {
+             document.title = newTitle;
+           }
+         }
 
-           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 updateHashIfNeeded() {
+           if (context.inIntro()) return;
+           var latestHash = computedHash();
 
+           if (_cachedHash !== latestHash) {
+             _cachedHash = latestHash; // Update the URL hash without affecting the browser navigation stack,
+             // though unavoidably creating a browser history entry
 
-           function initializeDependents() {
-             if (context.initialHashParams.presets) {
-               _mainPresetIndex.addablePresetIDs(new Set(context.initialHashParams.presets.split(',')));
-             }
+             window.history.replaceState(null, computedTitle(false
+             /* includeChangeCount */
+             ), latestHash); // set the title we want displayed for the browser tab/window
 
-             if (context.initialHashParams.locale) {
-               _mainLocalizer.preferredLocaleCodes(context.initialHashParams.locale);
-             } // kick off some async work
+             updateTitle(true
+             /* includeChangeCount */
+             );
+           }
+         }
 
+         var _throttledUpdate = throttle(updateHashIfNeeded, 500);
 
-             _mainLocalizer.ensureLoaded();
+         var _throttledUpdateTitle = throttle(function () {
+           updateTitle(true
+           /* includeChangeCount */
+           );
+         }, 500);
 
-             _background.ensureLoaded();
+         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);
 
-             _mainPresetIndex.ensureLoaded();
-             Object.values(services).forEach(function (service) {
-               if (service && typeof service.init === 'function') {
-                 service.init();
+           if (mapArgs.length < 3 || mapArgs.some(isNaN)) {
+             // replace bogus hash
+             updateHashIfNeeded();
+           } else {
+             // don't update if the new hash already reflects the state of iD
+             if (_cachedHash === computedHash()) return;
+             var mode = context.mode();
+             context.map().centerZoom([mapArgs[2], Math.min(_latitudeLimit, Math.max(-_latitudeLimit, mapArgs[1]))], mapArgs[0]);
+
+             if (q.id && mode) {
+               var ids = q.id.split(',').filter(function (id) {
+                 return context.hasEntity(id);
+               });
+
+               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,
                coreLocalizer: coreLocalizer,
                t: _t,
                localizer: _mainLocalizer,
+               coreLocations: coreLocations,
+               locationManager: _mainLocations,
                prefs: corePreferences,
                coreTree: coreTree,
                coreUploader: coreUploader,
                serviceMapillary: serviceMapillary,
                serviceMapRules: serviceMapRules,
                serviceNominatim: serviceNominatim,
+               serviceNsi: serviceNsi,
                serviceOpenstreetcam: serviceOpenstreetcam,
                serviceOsm: serviceOsm,
                serviceOsmWikibase: serviceOsmWikibase,
                uiFieldCycleway: uiFieldCycleway,
                uiFieldLanes: uiFieldLanes,
                uiFieldLocalized: uiFieldLocalized,
-               uiFieldMaxspeed: uiFieldMaxspeed,
+               uiFieldRoadspeed: uiFieldRoadspeed,
                uiFieldStructureRadio: uiFieldRadio,
                uiFieldRadio: uiFieldRadio,
                uiFieldRestrictions: uiFieldRestrictions,
                utilDisplayLabel: utilDisplayLabel,
                utilEntityRoot: utilEntityRoot,
                utilEditDistance: utilEditDistance,
-               utilEntitySelector: utilEntitySelector,
+               utilEntityAndDeepMemberIDs: utilEntityAndDeepMemberIDs,
                utilEntityOrMemberSelector: utilEntityOrMemberSelector,
                utilEntityOrDeepMemberSelector: utilEntityOrDeepMemberSelector,
+               utilEntitySelector: utilEntitySelector,
                utilFastMouse: utilFastMouse,
+               utilFetchJson: utilFetchJson,
                utilFunctor: utilFunctor,
                utilGetAllNodes: utilGetAllNodes,
                utilGetSetValue: utilGetSetValue,