text: define([
          '../Core/Cartesian2',
          '../Core/Cartesian3',
          '../Core/Cartographic',
          '../Core/combine',
          '../Core/Credit',
          '../Core/defaultValue',
          '../Core/defined',
          '../Core/defineProperties',
          '../Core/DeveloperError',
          '../Core/Event',
          '../Core/GeographicTilingScheme',
          '../Core/isArray',
          '../Core/loadJson',
          '../Core/loadText',
          '../Core/loadWithXhr',
          '../Core/loadXML',
          '../Core/Math',
          '../Core/Rectangle',
          '../Core/WebMercatorTilingScheme',
          '../ThirdParty/when',
          './ImageryProvider'
      ], function(
          Cartesian2,
          Cartesian3,
          Cartographic,
          combine,
          Credit,
          defaultValue,
          defined,
          defineProperties,
          DeveloperError,
          Event,
          GeographicTilingScheme,
          isArray,
          loadJson,
          loadText,
          loadWithXhr,
          loadXML,
          CesiumMath,
          Rectangle,
          WebMercatorTilingScheme,
          when,
          ImageryProvider) {
      'use strict';
  
      /**
       * Provides imagery by requesting tiles using a specified URL template.
       *
       * @alias UrlTemplateImageryProvider
       * @constructor
       *
       * @param {Promise.<Object>|Object} [options] Object with the following properties:
       * @param {String} options.url  The URL template to use to request tiles.  It has the following keywords:
       * <ul>
       *     <li><code>{z}</code>: The level of the tile in the tiling scheme.  Level zero is the root of the quadtree pyramid.</li>
       *     <li><code>{x}</code>: The tile X coordinate in the tiling scheme, where 0 is the Westernmost tile.</li>
       *     <li><code>{y}</code>: The tile Y coordinate in the tiling scheme, where 0 is the Northernmost tile.</li>
       *     <li><code>{s}</code>: One of the available subdomains, used to overcome browser limits on the number of simultaneous requests per host.</li>
       *     <li><code>{reverseX}</code>: The tile X coordinate in the tiling scheme, where 0 is the Easternmost tile.</li>
       *     <li><code>{reverseY}</code>: The tile Y coordinate in the tiling scheme, where 0 is the Southernmost tile.</li>
       *     <li><code>{reverseZ}</code>: The level of the tile in the tiling scheme, where level zero is the maximum level of the quadtree pyramid.  In order to use reverseZ, maximumLevel must be defined.</li>
       *     <li><code>{westDegrees}</code>: The Western edge of the tile in geodetic degrees.</li>
       *     <li><code>{southDegrees}</code>: The Southern edge of the tile in geodetic degrees.</li>
       *     <li><code>{eastDegrees}</code>: The Eastern edge of the tile in geodetic degrees.</li>
       *     <li><code>{northDegrees}</code>: The Northern edge of the tile in geodetic degrees.</li>
       *     <li><code>{westProjected}</code>: The Western edge of the tile in projected coordinates of the tiling scheme.</li>
       *     <li><code>{southProjected}</code>: The Southern edge of the tile in projected coordinates of the tiling scheme.</li>
       *     <li><code>{eastProjected}</code>: The Eastern edge of the tile in projected coordinates of the tiling scheme.</li>
       *     <li><code>{northProjected}</code>: The Northern edge of the tile in projected coordinates of the tiling scheme.</li>
       *     <li><code>{width}</code>: The width of each tile in pixels.</li>
       *     <li><code>{height}</code>: The height of each tile in pixels.</li>
       * </ul>
       * @param {String} [options.pickFeaturesUrl] The URL template to use to pick features.  If this property is not specified,
       *                 {@link UrlTemplateImageryProvider#pickFeatures} will immediately returned undefined, indicating no
       *                 features picked.  The URL template supports all of the keywords supported by the <code>url</code>
       *                 parameter, plus the following:
       * <ul>
       *     <li><code>{i}</code>: The pixel column (horizontal coordinate) of the picked position, where the Westernmost pixel is 0.</li>
       *     <li><code>{j}</code>: The pixel row (vertical coordinate) of the picked position, where the Northernmost pixel is 0.</li>
       *     <li><code>{reverseI}</code>: The pixel column (horizontal coordinate) of the picked position, where the Easternmost pixel is 0.</li>
       *     <li><code>{reverseJ}</code>: The pixel row (vertical coordinate) of the picked position, where the Southernmost pixel is 0.</li>
       *     <li><code>{longitudeDegrees}</code>: The longitude of the picked position in degrees.</li>
       *     <li><code>{latitudeDegrees}</code>: The latitude of the picked position in degrees.</li>
       *     <li><code>{longitudeProjected}</code>: The longitude of the picked position in the projected coordinates of the tiling scheme.</li>
       *     <li><code>{latitudeProjected}</code>: The latitude of the picked position in the projected coordinates of the tiling scheme.</li>
       *     <li><code>{format}</code>: The format in which to get feature information, as specified in the {@link GetFeatureInfoFormat}.</li>
       * </ul>
       * @param {Object} [options.urlSchemeZeroPadding] Gets the URL scheme zero padding for each tile coordinate. The format is '000' where
       * each coordinate will be padded on the left with zeros to match the width of the passed string of zeros. e.g. Setting:
       * urlSchemeZeroPadding : { '{x}' : '0000'}
       * will cause an 'x' value of 12 to return the string '0012' for {x} in the generated URL.
       * It the passed object has the following keywords:
       * <ul>
       *  <li> <code>{z}</code>: The zero padding for the level of the tile in the tiling scheme.</li>
       *  <li> <code>{x}</code>: The zero padding for the tile X coordinate in the tiling scheme.</li>
       *  <li> <code>{y}</code>: The zero padding for the the tile Y coordinate in the tiling scheme.</li>
       *  <li> <code>{reverseX}</code>: The zero padding for the tile reverseX coordinate in the tiling scheme.</li>
       *  <li> <code>{reverseY}</code>: The zero padding for the tile reverseY coordinate in the tiling scheme.</li>
       *  <li> <code>{reverseZ}</code>: The zero padding for the reverseZ coordinate of the tile in the tiling scheme.</li>
       * </ul>
       * @param {String|String[]} [options.subdomains='abc'] The subdomains to use for the <code>{s}</code> placeholder in the URL template.
       *                          If this parameter is a single string, each character in the string is a subdomain.  If it is
       *                          an array, each element in the array is a subdomain.
       * @param {Object} [options.proxy] A proxy to use for requests. This object is expected to have a getURL function which returns the proxied URL.
       * @param {Credit|String} [options.credit=''] A credit for the data source, which is displayed on the canvas.
       * @param {Number} [options.minimumLevel=0] The minimum level-of-detail supported by the imagery provider.  Take care when specifying
       *                 this that the number of tiles at the minimum level is small, such as four or less.  A larger number is likely
       *                 to result in rendering problems.
       * @param {Number} [options.maximumLevel] The maximum level-of-detail supported by the imagery provider, or undefined if there is no limit.
       * @param {Rectangle} [options.rectangle=Rectangle.MAX_VALUE] The rectangle, in radians, covered by the image.
       * @param {TilingScheme} [options.tilingScheme=WebMercatorTilingScheme] The tiling scheme specifying how the ellipsoidal
       * surface is broken into tiles.  If this parameter is not provided, a {@link WebMercatorTilingScheme}
       * is used.
       * @param {Ellipsoid} [options.ellipsoid] The ellipsoid.  If the tilingScheme is specified,
       *                    this parameter is ignored and the tiling scheme's ellipsoid is used instead. If neither
       *                    parameter is specified, the WGS84 ellipsoid is used.
       * @param {Number} [options.tileWidth=256] Pixel width of image tiles.
       * @param {Number} [options.tileHeight=256] Pixel height of image tiles.
       * @param {Boolean} [options.hasAlphaChannel=true] true if the images provided by this imagery provider
       *                  include an alpha channel; otherwise, false.  If this property is false, an alpha channel, if
       *                  present, will be ignored.  If this property is true, any images without an alpha channel will
       *                  be treated as if their alpha is 1.0 everywhere.  When this property is false, memory usage
       *                  and texture upload time are potentially reduced.
       * @param {GetFeatureInfoFormat[]} [options.getFeatureInfoFormats] The formats in which to get feature information at a
       *                                 specific location when {@link UrlTemplateImageryProvider#pickFeatures} is invoked.  If this
       *                                 parameter is not specified, feature picking is disabled.
       * @param {Boolean} [options.enablePickFeatures=true] If true, {@link UrlTemplateImageryProvider#pickFeatures} will
       *        request the <code>options.pickFeaturesUrl</code> and attempt to interpret the features included in the response.  If false,
       *        {@link UrlTemplateImageryProvider#pickFeatures} will immediately return undefined (indicating no pickable
       *        features) without communicating with the server.  Set this property to false if you know your data
       *        source does not support picking features or if you don't want this provider's features to be pickable. Note
       *        that this can be dynamically overridden by modifying the {@link UriTemplateImageryProvider#enablePickFeatures}
       *        property.
       *
       *
       * @example
       * // Access Natural Earth II imagery, which uses a TMS tiling scheme and Geographic (EPSG:4326) project
       * var tms = new Cesium.UrlTemplateImageryProvider({
       *     url : 'https://cesiumjs.org/tilesets/imagery/naturalearthii/{z}/{x}/{reverseY}.jpg',
       *     credit : '© Analytical Graphics, Inc.',
       *     tilingScheme : new Cesium.GeographicTilingScheme(),
       *     maximumLevel : 5
       * });
       * // Access the CartoDB Positron basemap, which uses an OpenStreetMap-like tiling scheme.
       * var positron = new Cesium.UrlTemplateImageryProvider({
       *     url : 'http://{s}.basemaps.cartocdn.com/light_all/{z}/{x}/{y}.png',
       *     credit : 'Map tiles by CartoDB, under CC BY 3.0. Data by OpenStreetMap, under ODbL.'
       * });
       * // Access a Web Map Service (WMS) server.
       * var wms = new Cesium.UrlTemplateImageryProvider({
       *    url : 'https://programs.communications.gov.au/geoserver/ows?tiled=true&' +
       *          'transparent=true&format=image%2Fpng&exceptions=application%2Fvnd.ogc.se_xml&' +
       *          'styles=&service=WMS&version=1.1.1&request=GetMap&' +
       *          'layers=public%3AMyBroadband_Availability&srs=EPSG%3A3857&' +
       *          'bbox={westProjected}%2C{southProjected}%2C{eastProjected}%2C{northProjected}&' +
       *          'width=256&height=256',
       *    rectangle : Cesium.Rectangle.fromDegrees(96.799393, -43.598214999057824, 153.63925700000001, -9.2159219997013)
       * });
       *
       * @see ArcGisMapServerImageryProvider
       * @see BingMapsImageryProvider
       * @see GoogleEarthEnterpriseMapsProvider
       * @see createOpenStreetMapImageryProvider
       * @see SingleTileImageryProvider
       * @see createTileMapServiceImageryProvider
       * @see WebMapServiceImageryProvider
       * @see WebMapTileServiceImageryProvider
       */
      function UrlTemplateImageryProvider(options) {
          //>>includeStart('debug', pragmas.debug);
          if (!defined(options)) {
            throw new DeveloperError('options is required.');
          }
          if (!when.isPromise(options) && !defined(options.url)) {
            throw new DeveloperError('options is required.');
          }
          //>>includeEnd('debug');
  
          this._errorEvent = new Event();
  
          this._url = undefined;
          this._urlSchemeZeroPadding = undefined;
          this._pickFeaturesUrl = undefined;
          this._proxy = undefined;
          this._tileWidth = undefined;
          this._tileHeight = undefined;
          this._maximumLevel = undefined;
          this._minimumLevel = undefined;
          this._tilingScheme = undefined;
          this._rectangle = undefined;
          this._tileDiscardPolicy = undefined;
          this._credit = undefined;
          this._hasAlphaChannel = undefined;
          this._readyPromise = undefined;
  
          /**
           * Gets or sets a value indicating whether feature picking is enabled.  If true, {@link UrlTemplateImageryProvider#pickFeatures} will
           * request the <code>options.pickFeaturesUrl</code> and attempt to interpret the features included in the response.  If false,
           * {@link UrlTemplateImageryProvider#pickFeatures} will immediately return undefined (indicating no pickable
           * features) without communicating with the server.  Set this property to false if you know your data
           * source does not support picking features or if you don't want this provider's features to be pickable.
           * @type {Boolean}
           * @default true
           */
          this.enablePickFeatures = true;
  
          this.reinitialize(options);
      }
  
      defineProperties(UrlTemplateImageryProvider.prototype, {
          /**
           * Gets the URL template to use to request tiles.  It has the following keywords:
           * <ul>
           *  <li> <code>{z}</code>: The level of the tile in the tiling scheme.  Level zero is the root of the quadtree pyramid.</li>
           *  <li> <code>{x}</code>: The tile X coordinate in the tiling scheme, where 0 is the Westernmost tile.</li>
           *  <li> <code>{y}</code>: The tile Y coordinate in the tiling scheme, where 0 is the Northernmost tile.</li>
           *  <li> <code>{s}</code>: One of the available subdomains, used to overcome browser limits on the number of simultaneous requests per host.</li>
           *  <li> <code>{reverseX}</code>: The tile X coordinate in the tiling scheme, where 0 is the Easternmost tile.</li>
           *  <li> <code>{reverseY}</code>: The tile Y coordinate in the tiling scheme, where 0 is the Southernmost tile.</li>
           *  <li> <code>{reverseZ}</code>: The level of the tile in the tiling scheme, where level zero is the maximum level of the quadtree pyramid.  In order to use reverseZ, maximumLevel must be defined.</li>
           *  <li> <code>{westDegrees}</code>: The Western edge of the tile in geodetic degrees.</li>
           *  <li> <code>{southDegrees}</code>: The Southern edge of the tile in geodetic degrees.</li>
           *  <li> <code>{eastDegrees}</code>: The Eastern edge of the tile in geodetic degrees.</li>
           *  <li> <code>{northDegrees}</code>: The Northern edge of the tile in geodetic degrees.</li>
           *  <li> <code>{westProjected}</code>: The Western edge of the tile in projected coordinates of the tiling scheme.</li>
           *  <li> <code>{southProjected}</code>: The Southern edge of the tile in projected coordinates of the tiling scheme.</li>
           *  <li> <code>{eastProjected}</code>: The Eastern edge of the tile in projected coordinates of the tiling scheme.</li>
           *  <li> <code>{northProjected}</code>: The Northern edge of the tile in projected coordinates of the tiling scheme.</li>
           *  <li> <code>{width}</code>: The width of each tile in pixels.</li>
           *  <li> <code>{height}</code>: The height of each tile in pixels.</li>
           * </ul>
           * @memberof UrlTemplateImageryProvider.prototype
           * @type {String}
           * @readonly
           */
          url : {
              get : function() {
                  return this._url;
              }
          },
  
          /**
           * Gets the URL scheme zero padding for each tile coordinate. The format is '000' where each coordinate will be padded on
           * the left with zeros to match the width of the passed string of zeros. e.g. Setting:
           * urlSchemeZeroPadding : { '{x}' : '0000'}
           * will cause an 'x' value of 12 to return the string '0012' for {x} in the generated URL.
           * It has the following keywords:
           * <ul>
           *  <li> <code>{z}</code>: The zero padding for the level of the tile in the tiling scheme.</li>
           *  <li> <code>{x}</code>: The zero padding for the tile X coordinate in the tiling scheme.</li>
           *  <li> <code>{y}</code>: The zero padding for the the tile Y coordinate in the tiling scheme.</li>
           *  <li> <code>{reverseX}</code>: The zero padding for the tile reverseX coordinate in the tiling scheme.</li>
           *  <li> <code>{reverseY}</code>: The zero padding for the tile reverseY coordinate in the tiling scheme.</li>
           *  <li> <code>{reverseZ}</code>: The zero padding for the reverseZ coordinate of the tile in the tiling scheme.</li>
           * </ul>
           * @memberof UrlTemplateImageryProvider.prototype
           * @type {Object}
           * @readonly
           */
          urlSchemeZeroPadding : {
              get : function() {
                  return this._urlSchemeZeroPadding;
              }
          },
  
          /**
           * Gets the URL template to use to use to pick features.  If this property is not specified,
           * {@link UrlTemplateImageryProvider#pickFeatures} will immediately returned undefined, indicating no
           * features picked.  The URL template supports all of the keywords supported by the
           * {@link UrlTemplateImageryProvider#url} property, plus the following:
           * <ul>
           *     <li><code>{i}</code>: The pixel column (horizontal coordinate) of the picked position, where the Westernmost pixel is 0.</li>
           *     <li><code>{j}</code>: The pixel row (vertical coordinate) of the picked position, where the Northernmost pixel is 0.</li>
           *     <li><code>{reverseI}</code>: The pixel column (horizontal coordinate) of the picked position, where the Easternmost pixel is 0.</li>
           *     <li><code>{reverseJ}</code>: The pixel row (vertical coordinate) of the picked position, where the Southernmost pixel is 0.</li>
           *     <li><code>{longitudeDegrees}</code>: The longitude of the picked position in degrees.</li>
           *     <li><code>{latitudeDegrees}</code>: The latitude of the picked position in degrees.</li>
           *     <li><code>{longitudeProjected}</code>: The longitude of the picked position in the projected coordinates of the tiling scheme.</li>
           *     <li><code>{latitudeProjected}</code>: The latitude of the picked position in the projected coordinates of the tiling scheme.</li>
           *     <li><code>{format}</code>: The format in which to get feature information, as specified in the {@link GetFeatureInfoFormat}.</li>
           * </ul>
           * @memberof UrlTemplateImageryProvider.prototype
           * @type {String}
           * @readonly
           */
          pickFeaturesUrl : {
              get : function() {
                  return this._pickFeaturesUrl;
              }
          },
  
          /**
           * Gets the proxy used by this provider.
           * @memberof UrlTemplateImageryProvider.prototype
           * @type {Proxy}
           * @readonly
           * @default undefined
           */
          proxy : {
              get : function() {
                  return this._proxy;
              }
          },
  
          /**
           * Gets the width of each tile, in pixels. This function should
           * not be called before {@link UrlTemplateImageryProvider#ready} returns true.
           * @memberof UrlTemplateImageryProvider.prototype
           * @type {Number}
           * @readonly
           * @default 256
           */
          tileWidth : {
              get : function() {
                  //>>includeStart('debug', pragmas.debug);
                  if (!this.ready) {
                      throw new DeveloperError('tileWidth must not be called before the imagery provider is ready.');
                  }
                  //>>includeEnd('debug');
                  return this._tileWidth;
              }
          },
  
          /**
           * Gets the height of each tile, in pixels.  This function should
           * not be called before {@link UrlTemplateImageryProvider#ready} returns true.
           * @memberof UrlTemplateImageryProvider.prototype
           * @type {Number}
           * @readonly
           * @default 256
           */
          tileHeight: {
              get : function() {
                  //>>includeStart('debug', pragmas.debug);
                  if (!this.ready) {
                      throw new DeveloperError('tileHeight must not be called before the imagery provider is ready.');
                  }
                  //>>includeEnd('debug');
                  return this._tileHeight;
              }
          },
  
          /**
           * Gets the maximum level-of-detail that can be requested, or undefined if there is no limit.
           * This function should not be called before {@link UrlTemplateImageryProvider#ready} returns true.
           * @memberof UrlTemplateImageryProvider.prototype
           * @type {Number}
           * @readonly
           * @default undefined
           */
          maximumLevel : {
              get : function() {
                  //>>includeStart('debug', pragmas.debug);
                  if (!this.ready) {
                      throw new DeveloperError('maximumLevel must not be called before the imagery provider is ready.');
                  }
                  //>>includeEnd('debug');
                  return this._maximumLevel;
              }
          },
  
          /**
           * Gets the minimum level-of-detail that can be requested.  This function should
           * not be called before {@link UrlTemplateImageryProvider#ready} returns true.
           * @memberof UrlTemplateImageryProvider.prototype
           * @type {Number}
           * @readonly
           * @default 0
           */
          minimumLevel : {
              get : function() {
                  //>>includeStart('debug', pragmas.debug);
                  if (!this.ready) {
                      throw new DeveloperError('minimumLevel must not be called before the imagery provider is ready.');
                  }
                  //>>includeEnd('debug');
                  return this._minimumLevel;
              }
          },
  
          /**
           * Gets the tiling scheme used by this provider.  This function should
           * not be called before {@link UrlTemplateImageryProvider#ready} returns true.
           * @memberof UrlTemplateImageryProvider.prototype
           * @type {TilingScheme}
           * @readonly
           * @default new WebMercatorTilingScheme()
           */
          tilingScheme : {
              get : function() {
                  //>>includeStart('debug', pragmas.debug);
                  if (!this.ready) {
                      throw new DeveloperError('tilingScheme must not be called before the imagery provider is ready.');
                  }
                  //>>includeEnd('debug');
                  return this._tilingScheme;
              }
          },
  
          /**
           * Gets the rectangle, in radians, of the imagery provided by this instance.  This function should
           * not be called before {@link UrlTemplateImageryProvider#ready} returns true.
           * @memberof UrlTemplateImageryProvider.prototype
           * @type {Rectangle}
           * @readonly
           * @default tilingScheme.rectangle
           */
          rectangle : {
              get : function() {
                  //>>includeStart('debug', pragmas.debug);
                  if (!this.ready) {
                      throw new DeveloperError('rectangle must not be called before the imagery provider is ready.');
                  }
                  //>>includeEnd('debug');
                  return this._rectangle;
              }
          },
  
          /**
           * Gets the tile discard policy.  If not undefined, the discard policy is responsible
           * for filtering out "missing" tiles via its shouldDiscardImage function.  If this function
           * returns undefined, no tiles are filtered.  This function should
           * not be called before {@link UrlTemplateImageryProvider#ready} returns true.
           * @memberof UrlTemplateImageryProvider.prototype
           * @type {TileDiscardPolicy}
           * @readonly
           * @default undefined
           */
          tileDiscardPolicy : {
              get : function() {
                  //>>includeStart('debug', pragmas.debug);
                  if (!this.ready) {
                      throw new DeveloperError('tileDiscardPolicy must not be called before the imagery provider is ready.');
                  }
                  //>>includeEnd('debug');
                  return this._tileDiscardPolicy;
              }
          },
  
          /**
           * Gets an event that is raised when the imagery provider encounters an asynchronous error.  By subscribing
           * to the event, you will be notified of the error and can potentially recover from it.  Event listeners
           * are passed an instance of {@link TileProviderError}.
           * @memberof UrlTemplateImageryProvider.prototype
           * @type {Event}
           * @readonly
           */
          errorEvent : {
              get : function() {
                  return this._errorEvent;
              }
          },
  
          /**
           * Gets a value indicating whether or not the provider is ready for use.
           * @memberof UrlTemplateImageryProvider.prototype
           * @type {Boolean}
           * @readonly
           */
          ready : {
              get : function() {
                  return defined(this._urlParts);
              }
          },
  
          /**
           * Gets a promise that resolves to true when the provider is ready for use.
           * @memberof UrlTemplateImageryProvider.prototype
           * @type {Promise.<Boolean>}
           * @readonly
           */
          readyPromise : {
              get : function() {
                  return this._readyPromise;
              }
          },
  
          /**
           * Gets the credit to display when this imagery provider is active.  Typically this is used to credit
           * the source of the imagery.  This function should not be called before {@link UrlTemplateImageryProvider#ready} returns true.
           * @memberof UrlTemplateImageryProvider.prototype
           * @type {Credit}
           * @readonly
           * @default undefined
           */
          credit : {
              get : function() {
                  //>>includeStart('debug', pragmas.debug);
                  if (!this.ready) {
                      throw new DeveloperError('credit must not be called before the imagery provider is ready.');
                  }
                  //>>includeEnd('debug');
                  return this._credit;
              }
          },
  
          /**
           * Gets a value indicating whether or not the images provided by this imagery provider
           * include an alpha channel.  If this property is false, an alpha channel, if present, will
           * be ignored.  If this property is true, any images without an alpha channel will be treated
           * as if their alpha is 1.0 everywhere.  When this property is false, memory usage
           * and texture upload time are reduced.  This function should
           * not be called before {@link ImageryProvider#ready} returns true.
           * @memberof UrlTemplateImageryProvider.prototype
           * @type {Boolean}
           * @readonly
           * @default true
           */
          hasAlphaChannel : {
              get : function() {
                  //>>includeStart('debug', pragmas.debug);
                  if (!this.ready) {
                      throw new DeveloperError('hasAlphaChannel must not be called before the imagery provider is ready.');
                  }
                  //>>includeEnd('debug');
                  return this._hasAlphaChannel;
              }
          }
      });
  
      /**
       * Reinitializes this instance.  Reinitializing an instance already in use is supported, but it is not
       * recommended because existing tiles provided by the imagery provider will not be updated.
       *
       * @param {Promise.<Object>|Object} options Any of the options that may be passed to the {@link UrlTemplateImageryProvider} constructor.
       */
      UrlTemplateImageryProvider.prototype.reinitialize = function(options) {
          var that = this;
          that._readyPromise = when(options).then(function(properties) {
              //>>includeStart('debug', pragmas.debug);
              if (!defined(properties)) {
                  throw new DeveloperError('options is required.');
                }
              if (!defined(properties.url)) {
                  throw new DeveloperError('options.url is required.');
              }
              //>>includeEnd('debug');
              that.enablePickFeatures = defaultValue(properties.enablePickFeatures, that.enablePickFeatures);
              that._url = properties.url;
              that._urlSchemeZeroPadding = defaultValue(properties.urlSchemeZeroPadding, that.urlSchemeZeroPadding);
              that._pickFeaturesUrl = properties.pickFeaturesUrl;
              that._proxy = properties.proxy;
              that._tileDiscardPolicy = properties.tileDiscardPolicy;
              that._getFeatureInfoFormats = properties.getFeatureInfoFormats;
  
              that._subdomains = properties.subdomains;
              if (isArray(that._subdomains)) {
                  that._subdomains = that._subdomains.slice();
              } else if (defined(that._subdomains) && that._subdomains.length > 0) {
                  that._subdomains = that._subdomains.split('');
              } else {
                  that._subdomains = ['a', 'b', 'c'];
              }
  
              that._tileWidth = defaultValue(properties.tileWidth, 256);
              that._tileHeight = defaultValue(properties.tileHeight, 256);
              that._minimumLevel = defaultValue(properties.minimumLevel, 0);
              that._maximumLevel = properties.maximumLevel;
              that._tilingScheme = defaultValue(properties.tilingScheme, new WebMercatorTilingScheme({ ellipsoid : properties.ellipsoid }));
              that._rectangle = defaultValue(properties.rectangle, that._tilingScheme.rectangle);
              that._rectangle = Rectangle.intersection(that._rectangle, that._tilingScheme.rectangle);
              that._hasAlphaChannel = defaultValue(properties.hasAlphaChannel, true);
  
              var credit = properties.credit;
              if (typeof credit === 'string') {
                  credit = new Credit(credit);
              }
              that._credit = credit;
  
              that._urlParts = urlTemplateToParts(that._url, tags); //eslint-disable-line no-use-before-define
              that._pickFeaturesUrlParts = urlTemplateToParts(that._pickFeaturesUrl, pickFeaturesTags); //eslint-disable-line no-use-before-define
              return true;
          });
      };
  
      /**
       * Gets the credits to be displayed when a given tile is displayed.
       *
       * @param {Number} x The tile X coordinate.
       * @param {Number} y The tile Y coordinate.
       * @param {Number} level The tile level;
       * @returns {Credit[]} The credits to be displayed when the tile is displayed.
       *
       * @exception {DeveloperError} <code>getTileCredits</code> must not be called before the imagery provider is ready.
       */
      UrlTemplateImageryProvider.prototype.getTileCredits = function(x, y, level) {
          //>>includeStart('debug', pragmas.debug);
          if (!this.ready) {
              throw new DeveloperError('getTileCredits must not be called before the imagery provider is ready.');
          }
          //>>includeEnd('debug');
          return undefined;
      };
  
      /**
       * Requests the image for a given tile.  This function should
       * not be called before {@link UrlTemplateImageryProvider#ready} returns true.
       *
       * @param {Number} x The tile X coordinate.
       * @param {Number} y The tile Y coordinate.
       * @param {Number} level The tile level.
       * @param {Request} [request] The request object. Intended for internal use only.
       * @returns {Promise.<Image|Canvas>|undefined} A promise for the image that will resolve when the image is available, or
       *          undefined if there are too many active requests to the server, and the request
       *          should be retried later.  The resolved image may be either an
       *          Image or a Canvas DOM object.
       */
      UrlTemplateImageryProvider.prototype.requestImage = function(x, y, level, request) {
          //>>includeStart('debug', pragmas.debug);
          if (!this.ready) {
              throw new DeveloperError('requestImage must not be called before the imagery provider is ready.');
          }
          //>>includeEnd('debug');
          var url = buildImageUrl(this, x, y, level);
          return ImageryProvider.loadImage(this, url, request);
      };
  
      /**
       * Asynchronously determines what features, if any, are located at a given longitude and latitude within
       * a tile.  This function should not be called before {@link ImageryProvider#ready} returns true.
       *
       * @param {Number} x The tile X coordinate.
       * @param {Number} y The tile Y coordinate.
       * @param {Number} level The tile level.
       * @param {Number} longitude The longitude at which to pick features.
       * @param {Number} latitude  The latitude at which to pick features.
       * @return {Promise.<ImageryLayerFeatureInfo[]>|undefined} A promise for the picked features that will resolve when the asynchronous
       *                   picking completes.  The resolved value is an array of {@link ImageryLayerFeatureInfo}
       *                   instances.  The array may be empty if no features are found at the given location.
       *                   It may also be undefined if picking is not supported.
       */
      UrlTemplateImageryProvider.prototype.pickFeatures = function(x, y, level, longitude, latitude) {
          //>>includeStart('debug', pragmas.debug);
          if (!this.ready) {
              throw new DeveloperError('pickFeatures must not be called before the imagery provider is ready.');
          }
          //>>includeEnd('debug');
  
          if (!this.enablePickFeatures || !defined(this._pickFeaturesUrl) || this._getFeatureInfoFormats.length === 0) {
              return undefined;
          }
  
          var formatIndex = 0;
  
          var that = this;
  
          function handleResponse(format, data) {
              return format.callback(data);
          }
  
          function doRequest() {
              if (formatIndex >= that._getFeatureInfoFormats.length) {
                  // No valid formats, so no features picked.
                  return when([]);
              }
  
              var format = that._getFeatureInfoFormats[formatIndex];
              var url = buildPickFeaturesUrl(that, x, y, level, longitude, latitude, format.format);
  
              ++formatIndex;
  
              if (format.type === 'json') {
                  return loadJson(url).then(format.callback).otherwise(doRequest);
              } else if (format.type === 'xml') {
                  return loadXML(url).then(format.callback).otherwise(doRequest);
              } else if (format.type === 'text' || format.type === 'html') {
                  return loadText(url).then(format.callback).otherwise(doRequest);
              }
              return loadWithXhr({
                  url : url,
                  responseType : format.format
              }).then(handleResponse.bind(undefined, format)).otherwise(doRequest);
          }
  
          return doRequest();
      };
  
      var degreesScratchComputed = false;
      var degreesScratch = new Rectangle();
      var projectedScratchComputed = false;
      var projectedScratch = new Rectangle();
  
      function buildImageUrl(imageryProvider, x, y, level) {
          degreesScratchComputed = false;
          projectedScratchComputed = false;
  
          return buildUrl(imageryProvider, imageryProvider._urlParts, function(partFunction) {
              return partFunction(imageryProvider, x, y, level);
          });
      }
  
      var ijScratchComputed = false;
      var ijScratch = new Cartesian2();
      var longitudeLatitudeProjectedScratchComputed = false;
  
      function buildPickFeaturesUrl(imageryProvider, x, y, level, longitude, latitude, format) {
          degreesScratchComputed = false;
          projectedScratchComputed = false;
          ijScratchComputed = false;
          longitudeLatitudeProjectedScratchComputed = false;
  
          return buildUrl(imageryProvider, imageryProvider._pickFeaturesUrlParts, function(partFunction) {
              return partFunction(imageryProvider, x, y, level, longitude, latitude, format);
          });
      }
  
      function buildUrl(imageryProvider, parts, partFunctionInvoker) {
          var url = '';
  
          for (var i = 0; i < parts.length; ++i) {
              var part = parts[i];
              if (typeof part === 'string') {
                  url += part;
              } else {
                  url += encodeURIComponent(partFunctionInvoker(part));
              }
          }
  
          var proxy = imageryProvider._proxy;
          if (defined(proxy)) {
              url = proxy.getURL(url);
          }
  
          return url;
      }
  
      function urlTemplateToParts(url, tags) {
          if (!defined(url)) {
              return undefined;
          }
  
          var parts = [];
          var nextIndex = 0;
          var minIndex;
          var minTag;
          var tagList = Object.keys(tags);
  
          while (nextIndex < url.length) {
              minIndex = Number.MAX_VALUE;
              minTag = undefined;
  
              for (var i = 0; i < tagList.length; ++i) {
                  var thisIndex = url.indexOf(tagList[i], nextIndex);
                  if (thisIndex >= 0 && thisIndex < minIndex) {
                      minIndex = thisIndex;
                      minTag = tagList[i];
                  }
              }
  
              if (!defined(minTag)) {
                  parts.push(url.substring(nextIndex));
                  nextIndex = url.length;
              } else {
                  if (nextIndex < minIndex) {
                      parts.push(url.substring(nextIndex, minIndex));
                  }
                  parts.push(tags[minTag]);
                  nextIndex = minIndex + minTag.length;
              }
          }
  
          return parts;
      }
  
      function padWithZerosIfNecessary(imageryProvider, key, value) {
          if (imageryProvider &&
              imageryProvider.urlSchemeZeroPadding &&
              imageryProvider.urlSchemeZeroPadding.hasOwnProperty(key) )
          {
              var paddingTemplate = imageryProvider.urlSchemeZeroPadding[key];
              if (typeof paddingTemplate === 'string') {
                  var paddingTemplateWidth = paddingTemplate.length;
                  if (paddingTemplateWidth > 1) {
                      value = (value.length >= paddingTemplateWidth) ? value : new Array(paddingTemplateWidth - value.toString().length + 1).join('0') + value;
                  }
              }
          }
          return value;
      }
  
      function xTag(imageryProvider, x, y, level) {
          return padWithZerosIfNecessary(imageryProvider, '{x}', x);
      }
  
      function reverseXTag(imageryProvider, x, y, level) {
          var reverseX = imageryProvider.tilingScheme.getNumberOfXTilesAtLevel(level) - x - 1;
          return padWithZerosIfNecessary(imageryProvider, '{reverseX}', reverseX);
      }
  
      function yTag(imageryProvider, x, y, level) {
          return padWithZerosIfNecessary(imageryProvider, '{y}', y);
      }
  
      function reverseYTag(imageryProvider, x, y, level) {
          var reverseY = imageryProvider.tilingScheme.getNumberOfYTilesAtLevel(level) - y - 1;
          return padWithZerosIfNecessary(imageryProvider, '{reverseY}', reverseY);
      }
  
      function reverseZTag(imageryProvider, x, y, level) {
          var maximumLevel = imageryProvider.maximumLevel;
          var reverseZ = defined(maximumLevel) && level < maximumLevel ? maximumLevel - level - 1 : level;
          return padWithZerosIfNecessary(imageryProvider, '{reverseZ}', reverseZ);
      }
  
      function zTag(imageryProvider, x, y, level) {
          return padWithZerosIfNecessary(imageryProvider, '{z}', level);
      }
  
      function sTag(imageryProvider, x, y, level) {
          var index = (x + y + level) % imageryProvider._subdomains.length;
          return imageryProvider._subdomains[index];
      }
  
      function computeDegrees(imageryProvider, x, y, level) {
          if (degreesScratchComputed) {
              return;
          }
  
          imageryProvider.tilingScheme.tileXYToRectangle(x, y, level, degreesScratch);
          degreesScratch.west = CesiumMath.toDegrees(degreesScratch.west);
          degreesScratch.south = CesiumMath.toDegrees(degreesScratch.south);
          degreesScratch.east = CesiumMath.toDegrees(degreesScratch.east);
          degreesScratch.north = CesiumMath.toDegrees(degreesScratch.north);
  
          degreesScratchComputed = true;
      }
  
      function westDegreesTag(imageryProvider, x, y, level) {
          computeDegrees(imageryProvider, x, y, level);
          return degreesScratch.west;
      }
  
      function southDegreesTag(imageryProvider, x, y, level) {
          computeDegrees(imageryProvider, x, y, level);
          return degreesScratch.south;
      }
  
      function eastDegreesTag(imageryProvider, x, y, level) {
          computeDegrees(imageryProvider, x, y, level);
          return degreesScratch.east;
      }
  
      function northDegreesTag(imageryProvider, x, y, level) {
          computeDegrees(imageryProvider, x, y, level);
          return degreesScratch.north;
      }
  
      function computeProjected(imageryProvider, x, y, level) {
          if (projectedScratchComputed) {
              return;
          }
  
          imageryProvider.tilingScheme.tileXYToNativeRectangle(x, y, level, projectedScratch);
  
          projectedScratchComputed = true;
      }
  
      function westProjectedTag(imageryProvider, x, y, level) {
          computeProjected(imageryProvider, x, y, level);
          return projectedScratch.west;
      }
  
      function southProjectedTag(imageryProvider, x, y, level) {
          computeProjected(imageryProvider, x, y, level);
          return projectedScratch.south;
      }
  
      function eastProjectedTag(imageryProvider, x, y, level) {
          computeProjected(imageryProvider, x, y, level);
          return projectedScratch.east;
      }
  
      function northProjectedTag(imageryProvider, x, y, level) {
          computeProjected(imageryProvider, x, y, level);
          return projectedScratch.north;
      }
  
      function widthTag(imageryProvider, x, y, level) {
          return imageryProvider.tileWidth;
      }
  
      function heightTag(imageryProvider, x, y, level) {
          return imageryProvider.tileHeight;
      }
  
      function iTag(imageryProvider, x, y, level, longitude, latitude, format) {
          computeIJ(imageryProvider, x, y, level, longitude, latitude);
          return ijScratch.x;
      }
  
      function jTag(imageryProvider, x, y, level, longitude, latitude, format) {
          computeIJ(imageryProvider, x, y, level, longitude, latitude);
          return ijScratch.y;
      }
  
      function reverseITag(imageryProvider, x, y, level, longitude, latitude, format) {
          computeIJ(imageryProvider, x, y, level, longitude, latitude);
          return imageryProvider.tileWidth - ijScratch.x - 1;
      }
  
      function reverseJTag(imageryProvider, x, y, level, longitude, latitude, format) {
          computeIJ(imageryProvider, x, y, level, longitude, latitude);
          return imageryProvider.tileHeight - ijScratch.y - 1;
      }
  
      var rectangleScratch = new Rectangle();
      var longitudeLatitudeProjectedScratch = new Cartesian3();
  
      function computeIJ(imageryProvider, x, y, level, longitude, latitude, format) {
          if (ijScratchComputed) {
              return;
          }
  
          computeLongitudeLatitudeProjected(imageryProvider, x, y, level, longitude, latitude);
          var projected = longitudeLatitudeProjectedScratch;
  
          var rectangle = imageryProvider.tilingScheme.tileXYToNativeRectangle(x, y, level, rectangleScratch);
          ijScratch.x = (imageryProvider.tileWidth * (projected.x - rectangle.west) / rectangle.width) | 0;
          ijScratch.y = (imageryProvider.tileHeight * (rectangle.north - projected.y) / rectangle.height) | 0;
          ijScratchComputed = true;
      }
  
      function longitudeDegreesTag(imageryProvider, x, y, level, longitude, latitude, format) {
          return CesiumMath.toDegrees(longitude);
      }
  
      function latitudeDegreesTag(imageryProvider, x, y, level, longitude, latitude, format) {
          return CesiumMath.toDegrees(latitude);
      }
  
      function longitudeProjectedTag(imageryProvider, x, y, level, longitude, latitude, format) {
          computeLongitudeLatitudeProjected(imageryProvider, x, y, level, longitude, latitude);
          return longitudeLatitudeProjectedScratch.x;
      }
  
      function latitudeProjectedTag(imageryProvider, x, y, level, longitude, latitude, format) {
          computeLongitudeLatitudeProjected(imageryProvider, x, y, level, longitude, latitude);
          return longitudeLatitudeProjectedScratch.y;
      }
  
      var cartographicScratch = new Cartographic();
  
      function computeLongitudeLatitudeProjected(imageryProvider, x, y, level, longitude, latitude, format) {
          if (longitudeLatitudeProjectedScratchComputed) {
              return;
          }
  
          if (imageryProvider.tilingScheme instanceof GeographicTilingScheme) {
              longitudeLatitudeProjectedScratch.x = CesiumMath.toDegrees(longitude);
              longitudeLatitudeProjectedScratch.y = CesiumMath.toDegrees(latitude);
          } else {
              var cartographic = cartographicScratch;
              cartographic.longitude = longitude;
              cartographic.latitude = latitude;
              imageryProvider.tilingScheme.projection.project(cartographic, longitudeLatitudeProjectedScratch);
          }
  
          longitudeLatitudeProjectedScratchComputed = true;
      }
  
      function formatTag(imageryProvider, x, y, level, longitude, latitude, format) {
          return format;
      }
  
      var tags = {
          '{x}': xTag,
          '{y}': yTag,
          '{z}': zTag,
          '{s}': sTag,
          '{reverseX}': reverseXTag,
          '{reverseY}': reverseYTag,
          '{reverseZ}': reverseZTag,
          '{westDegrees}': westDegreesTag,
          '{southDegrees}': southDegreesTag,
          '{eastDegrees}': eastDegreesTag,
          '{northDegrees}': northDegreesTag,
          '{westProjected}': westProjectedTag,
          '{southProjected}': southProjectedTag,
          '{eastProjected}': eastProjectedTag,
          '{northProjected}': northProjectedTag,
          '{width}': widthTag,
          '{height}': heightTag
      };
  
      var pickFeaturesTags = combine(tags, {
          '{i}' : iTag,
          '{j}' : jTag,
          '{reverseI}' : reverseITag,
          '{reverseJ}' : reverseJTag,
          '{longitudeDegrees}' : longitudeDegreesTag,
          '{latitudeDegrees}' : latitudeDegreesTag,
          '{longitudeProjected}' : longitudeProjectedTag,
          '{latitudeProjected}' : latitudeProjectedTag,
          '{format}' : formatTag
      });
  
      return UrlTemplateImageryProvider;
  });
  