text: /*global define*/
  define([
          '../Core/Cartesian2',
          '../Core/Cartesian3',
          '../Core/Cartographic',
          '../Core/Credit',
          '../Core/defaultValue',
          '../Core/defined',
          '../Core/defineProperties',
          '../Core/DeveloperError',
          '../Core/Event',
          '../Core/GeographicProjection',
          '../Core/GeographicTilingScheme',
          '../Core/loadJsonp',
          '../Core/loadJson',
          '../Core/Math',
          '../Core/Rectangle',
          '../Core/TileProviderError',
          '../Core/WebMercatorProjection',
          '../Core/WebMercatorTilingScheme',
          '../ThirdParty/when',
          './DiscardMissingTileImagePolicy',
          './ImageryLayerFeatureInfo',
          './ImageryProvider'
      ], function(
          Cartesian2,
          Cartesian3,
          Cartographic,
          Credit,
          defaultValue,
          defined,
          defineProperties,
          DeveloperError,
          Event,
          GeographicProjection,
          GeographicTilingScheme,
          loadJsonp,
          loadJson,
          CesiumMath,
          Rectangle,
          TileProviderError,
          WebMercatorProjection,
          WebMercatorTilingScheme,
          when,
          DiscardMissingTileImagePolicy,
          ImageryLayerFeatureInfo,
          ImageryProvider) {
      "use strict";
  
      /**
       * Provides tiled imagery hosted by an ArcGIS MapServer.  By default, the server's pre-cached tiles are
       * used, if available.
       *
       * @alias ArcGisMapServerImageryProvider
       * @constructor
       *
       * @param {Object} options Object with the following properties:
       * @param {String} options.url The URL of the ArcGIS MapServer service.
       * @param {String} [options.token] The ArcGIS token used to authenticate with the ArcGIS MapServer service.
       * @param {TileDiscardPolicy} [options.tileDiscardPolicy] The policy that determines if a tile
       *        is invalid and should be discarded.  If this value is not specified, a default
       *        {@link DiscardMissingTileImagePolicy} is used for tiled map servers, and a
       *        {@link NeverTileDiscardPolicy} is used for non-tiled map servers.  In the former case,
       *        we request tile 0,0 at the maximum tile level and check pixels (0,0), (200,20), (20,200),
       *        (80,110), and (160, 130).  If all of these pixels are transparent, the discard check is
       *        disabled and no tiles are discarded.  If any of them have a non-transparent color, any
       *        tile that has the same values in these pixel locations is discarded.  The end result of
       *        these defaults should be correct tile discarding for a standard ArcGIS Server.  To ensure
       *        that no tiles are discarded, construct and pass a {@link NeverTileDiscardPolicy} for this
       *        parameter.
       * @param {Proxy} [options.proxy] A proxy to use for requests. This object is
       *        expected to have a getURL function which returns the proxied URL, if needed.
       * @param {Boolean} [options.usePreCachedTilesIfAvailable=true] If true, the server's pre-cached
       *        tiles are used if they are available.  If false, any pre-cached tiles are ignored and the
       *        'export' service is used.
       * @param {String} [options.layers] A comma-separated list of the layers to show, or undefined if all layers should be shown.
       * @param {Boolean} [options.enablePickFeatures=true] If true, {@link ArcGisMapServerImageryProvider#pickFeatures} will invoke
       *        the Identify service on the MapServer and return the features included in the response.  If false,
       *        {@link ArcGisMapServerImageryProvider#pickFeatures} will immediately return undefined (indicating no pickable features)
       *        without communicating with the server.  Set this property to false if you don't want this provider's features to
       *        be pickable.
       * @param {Rectangle} [options.rectangle=Rectangle.MAX_VALUE] The rectangle of the layer.  This parameter is ignored when accessing
       *                    a tiled layer.
       * @param {TilingScheme} [options.tilingScheme=new GeographicTilingScheme()] The tiling scheme to use to divide the world into tiles.
       *                       This parameter is ignored when accessing a tiled server.
       * @param {Ellipsoid} [options.ellipsoid] The ellipsoid.  If the tilingScheme is specified and used,
       *                    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] The width of each tile in pixels.  This parameter is ignored when accessing a tiled server.
       * @param {Number} [options.tileHeight=256] The height of each tile in pixels.  This parameter is ignored when accessing a tiled server.
       * @param {Number} [options.maximumLevel] The maximum tile level to request, or undefined if there is no maximum.  This parameter is ignored when accessing
       *                                        a tiled server.
       *
       * @see BingMapsImageryProvider
       * @see GoogleEarthImageryProvider
       * @see OpenStreetMapImageryProvider
       * @see SingleTileImageryProvider
       * @see TileMapServiceImageryProvider
       * @see WebMapServiceImageryProvider
       * @see WebMapTileServiceImageryProvider
       * @see UrlTemplateImageryProvider
       *
       * @see {@link http://resources.esri.com/help/9.3/arcgisserver/apis/rest/|ArcGIS Server REST API}
       * @see {@link http://www.w3.org/TR/cors/|Cross-Origin Resource Sharing}
       *
       * @example
       * var esri = new Cesium.ArcGisMapServerImageryProvider({
       *     url: '//services.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer'
       * });
       */
      var ArcGisMapServerImageryProvider = function ArcGisMapServerImageryProvider(options) {
          options = defaultValue(options, {});
  
          //>>includeStart('debug', pragmas.debug);
          if (!defined(options.url)) {
              throw new DeveloperError('options.url is required.');
          }
          //>>includeEnd('debug');
  
          this._url = options.url;
          this._token = options.token;
          this._tileDiscardPolicy = options.tileDiscardPolicy;
          this._proxy = options.proxy;
  
          this._tileWidth = defaultValue(options.tileWidth, 256);
          this._tileHeight = defaultValue(options.tileHeight, 256);
          this._maximumLevel = options.maximumLevel;
          this._tilingScheme = defaultValue(options.tilingScheme, new GeographicTilingScheme({ ellipsoid : options.ellipsoid }));
          this._credit = undefined;
          this._useTiles = defaultValue(options.usePreCachedTilesIfAvailable, true);
          this._rectangle = defaultValue(options.rectangle, this._tilingScheme.rectangle);
          this._layers = options.layers;
          this._enablePickFeatures = defaultValue(options.enablePickFeatures, true);
  
          this._errorEvent = new Event();
  
          this._ready = false;
  
          // Grab the details of this MapServer.
          var that = this;
          var metadataError;
  
          function metadataSuccess(data) {
              var tileInfo = data.tileInfo;
              if (!defined(tileInfo)) {
                  that._useTiles = false;
              } else {
                  that._tileWidth = tileInfo.rows;
                  that._tileHeight = tileInfo.cols;
  
                  if (tileInfo.spatialReference.wkid === 102100 ||
                      tileInfo.spatialReference.wkid === 102113) {
                      that._tilingScheme = new WebMercatorTilingScheme({ ellipsoid : options.ellipsoid });
                  } else if (data.tileInfo.spatialReference.wkid === 4326) {
                      that._tilingScheme = new GeographicTilingScheme({ ellipsoid : options.ellipsoid });
                  } else {
                      var message = 'Tile spatial reference WKID ' + data.tileInfo.spatialReference.wkid + ' is not supported.';
                      metadataError = TileProviderError.handleError(metadataError, that, that._errorEvent, message, undefined, undefined, undefined, requestMetadata);
                      return;
                  }
                  that._maximumLevel = data.tileInfo.lods.length - 1;
  
                  if (defined(data.fullExtent)) {
                      if (defined(data.fullExtent.spatialReference) && defined(data.fullExtent.spatialReference.wkid)) {
                          if (data.fullExtent.spatialReference.wkid === 102100 ||
                              data.fullExtent.spatialReference.wkid === 102113) {
  
                              var projection = new WebMercatorProjection();
                              var sw = projection.unproject(new Cartesian2(data.fullExtent.xmin, data.fullExtent.ymin));
                              var ne = projection.unproject(new Cartesian2(data.fullExtent.xmax, data.fullExtent.ymax));
                              that._rectangle = new Rectangle(sw.longitude, sw.latitude, ne.longitude, ne.latitude);
                          } else if (data.fullExtent.spatialReference.wkid === 4326) {
                              that._rectangle = Rectangle.fromDegrees(data.fullExtent.xmin, data.fullExtent.ymin, data.fullExtent.xmax, data.fullExtent.ymax);
                          } else {
                              var extentMessage = 'fullExtent.spatialReference WKID ' + data.fullExtent.spatialReference.wkid + ' is not supported.';
                              metadataError = TileProviderError.handleError(metadataError, that, that._errorEvent, extentMessage, undefined, undefined, undefined, requestMetadata);
                              return;
                          }
                      }
                  } else {
                      that._rectangle = that._tilingScheme.rectangle;
                  }
  
                  // Install the default tile discard policy if none has been supplied.
                  if (!defined(that._tileDiscardPolicy)) {
                      that._tileDiscardPolicy = new DiscardMissingTileImagePolicy({
                          missingImageUrl : buildImageUrl(that, 0, 0, that._maximumLevel),
                          pixelsToCheck : [new Cartesian2(0, 0), new Cartesian2(200, 20), new Cartesian2(20, 200), new Cartesian2(80, 110), new Cartesian2(160, 130)],
                          disableCheckIfAllPixelsAreTransparent : true
                      });
                  }
  
                  that._useTiles = true;
              }
  
              if (defined(data.copyrightText) && data.copyrightText.length > 0) {
                  that._credit = new Credit(data.copyrightText);
              }
  
              that._ready = true;
              TileProviderError.handleSuccess(metadataError);
          }
  
          function metadataFailure(e) {
              var message = 'An error occurred while accessing ' + that._url + '.';
              metadataError = TileProviderError.handleError(metadataError, that, that._errorEvent, message, undefined, undefined, undefined, requestMetadata);
          }
  
          function requestMetadata() {
              var parameters = {
                  f: 'json'
              };
  
              if (defined(that._token)) {
                  parameters.token = that._token;
              }
  
              var metadata = loadJsonp(that._url, {
                  parameters : parameters,
                  proxy : that._proxy
              });
              when(metadata, metadataSuccess, metadataFailure);
          }
  
          if (this._useTiles) {
              requestMetadata();
          } else {
              this._ready = true;
          }
      };
  
      function buildImageUrl(imageryProvider, x, y, level) {
          var url;
          if (imageryProvider._useTiles) {
              url = imageryProvider._url + '/tile/' + level + '/' + y + '/' + x;
          } else {
              var nativeRectangle = imageryProvider._tilingScheme.tileXYToNativeRectangle(x, y, level);
              var bbox = nativeRectangle.west + '%2C' + nativeRectangle.south + '%2C' + nativeRectangle.east + '%2C' + nativeRectangle.north;
  
              url = imageryProvider._url + '/export?';
              url += 'bbox=' + bbox;
              if (imageryProvider._tilingScheme instanceof GeographicTilingScheme) {
                  url += '&bboxSR=4326&imageSR=4326';
              } else {
                  url += '&bboxSR=3857&imageSR=3857';
              }
              url += '&size=' + imageryProvider._tileWidth + '%2C' + imageryProvider._tileHeight;
              url += '&format=png&transparent=true&f=image';
  
              if (imageryProvider.layers) {
                  url += '&layers=show:' + imageryProvider.layers;
              }
          }
  
          var token = imageryProvider._token;
          if (defined(token)) {
              if (url.indexOf('?') === -1) {
                  url += '?';
              }
              if (url[url.length - 1] !== '?'){
                  url += '&';
              }
              url += 'token=' + token;
          }
  
          var proxy = imageryProvider._proxy;
          if (defined(proxy)) {
              url = proxy.getURL(url);
          }
  
          return url;
      }
  
      defineProperties(ArcGisMapServerImageryProvider.prototype, {
          /**
           * Gets the URL of the ArcGIS MapServer.
           * @memberof ArcGisMapServerImageryProvider.prototype
           * @type {String}
           * @readonly
           */
          url : {
              get : function() {
                  return this._url;
              }
          },
  
          /**
           * Gets the ArcGIS token used to authenticate with the ArcGis MapServer service.
           * @memberof ArcGisMapServerImageryProvider.prototype
           * @type {String}
           * @readonly
           */
          token : {
              get : function() {
                  return this._token;
              }
          },
  
          /**
           * Gets the proxy used by this provider.
           * @memberof ArcGisMapServerImageryProvider.prototype
           * @type {Proxy}
           * @readonly
           */
          proxy : {
              get : function() {
                  return this._proxy;
              }
          },
  
          /**
           * Gets the width of each tile, in pixels. This function should
           * not be called before {@link ArcGisMapServerImageryProvider#ready} returns true.
           * @memberof ArcGisMapServerImageryProvider.prototype
           * @type {Number}
           * @readonly
           */
          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 ArcGisMapServerImageryProvider#ready} returns true.
           * @memberof ArcGisMapServerImageryProvider.prototype
           * @type {Number}
           * @readonly
           */
          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.  This function should
           * not be called before {@link ArcGisMapServerImageryProvider#ready} returns true.
           * @memberof ArcGisMapServerImageryProvider.prototype
           * @type {Number}
           * @readonly
           */
          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 ArcGisMapServerImageryProvider#ready} returns true.
           * @memberof ArcGisMapServerImageryProvider.prototype
           * @type {Number}
           * @readonly
           */
          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 0;
              }
          },
  
          /**
           * Gets the tiling scheme used by this provider.  This function should
           * not be called before {@link ArcGisMapServerImageryProvider#ready} returns true.
           * @memberof ArcGisMapServerImageryProvider.prototype
           * @type {TilingScheme}
           * @readonly
           */
          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 ArcGisMapServerImageryProvider#ready} returns true.
           * @memberof ArcGisMapServerImageryProvider.prototype
           * @type {Rectangle}
           * @readonly
           */
          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 ArcGisMapServerImageryProvider#ready} returns true.
           * @memberof ArcGisMapServerImageryProvider.prototype
           * @type {TileDiscardPolicy}
           * @readonly
           */
          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 ArcGisMapServerImageryProvider.prototype
           * @type {Event}
           * @readonly
           */
          errorEvent : {
              get : function() {
                  return this._errorEvent;
              }
          },
  
          /**
           * Gets a value indicating whether or not the provider is ready for use.
           * @memberof ArcGisMapServerImageryProvider.prototype
           * @type {Boolean}
           * @readonly
           */
          ready : {
              get : function() {
                  return this._ready;
              }
          },
  
          /**
           * 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 ArcGisMapServerImageryProvider#ready} returns true.
           * @memberof ArcGisMapServerImageryProvider.prototype
           * @type {Credit}
           * @readonly
           */
          credit : {
              get : function() {
                  return this._credit;
              }
          },
  
          /**
           * Gets a value indicating whether this imagery provider is using pre-cached tiles from the
           * ArcGIS MapServer.  If the imagery provider is not yet ready ({@link ArcGisMapServerImageryProvider#ready}), this function
           * will return the value of `options.usePreCachedTilesIfAvailable`, even if the MapServer does
           * not have pre-cached tiles.
           * @memberof ArcGisMapServerImageryProvider.prototype
           *
           * @type {Boolean}
           * @readonly
           * @default true
           */
          usingPrecachedTiles : {
              get : function() {
                  return this._useTiles;
              }
          },
  
          /**
           * 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.
           * @memberof ArcGisMapServerImageryProvider.prototype
           *
           * @type {Boolean}
           * @readonly
           * @default true
           */
          hasAlphaChannel : {
              get : function() {
                  return true;
              }
          },
  
          /**
           * Gets the comma-separated list of layer IDs to show.
           * @type {String}
           */
          layers : {
              get : function() {
                  return this._layers;
              }
          },
  
          /**
           * Gets a value indicating whether feature picking is enabled.  If true, {@link ArcGisMapServerImageryProvider#pickFeatures} will
           * invoke the "identify" operation on the ArcGIS server and return the features included in the response.  If false,
           * {@link ArcGisMapServerImageryProvider#pickFeatures} will immediately return undefined (indicating no pickable features)
           * without communicating with the server.
           * @type {Boolean}
           * @readonly
           * @default true
           */
          enablePickFeatures : {
              get : function() {
                  return this._enablePickFeatures;
              }
          }
      });
  
  
      /**
       * 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.
       */
      ArcGisMapServerImageryProvider.prototype.getTileCredits = function(x, y, level) {
          return undefined;
      };
  
      /**
       * Requests the image for a given tile.  This function should
       * not be called before {@link ArcGisMapServerImageryProvider#ready} returns true.
       *
       * @param {Number} x The tile X coordinate.
       * @param {Number} y The tile Y coordinate.
       * @param {Number} level The tile level.
       * @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.
       *
       * @exception {DeveloperError} <code>requestImage</code> must not be called before the imagery provider is ready.
       */
      ArcGisMapServerImageryProvider.prototype.requestImage = function(x, y, level) {
          //>>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);
      };
  
      /**
      /**
       * 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.
       *
       * @exception {DeveloperError} <code>pickFeatures</code> must not be called before the imagery provider is ready.
       */
      ArcGisMapServerImageryProvider.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) {
              return undefined;
          }
  
          var rectangle = this._tilingScheme.tileXYToNativeRectangle(x, y, level);
  
          var horizontal;
          var vertical;
          var sr;
          if (this._tilingScheme instanceof GeographicTilingScheme) {
              horizontal = CesiumMath.toDegrees(longitude);
              vertical = CesiumMath.toDegrees(latitude);
              sr = '4326';
          } else {
              var projected = this._tilingScheme.projection.project(new Cartographic(longitude, latitude, 0.0));
              horizontal = projected.x;
              vertical = projected.y;
              sr = '3857';
          }
  
          var url = this._url + '/identify?f=json&tolerance=2&geometryType=esriGeometryPoint';
          url += '&geometry=' + horizontal + ',' + vertical;
          url += '&mapExtent=' + rectangle.west + ',' + rectangle.south + ',' + rectangle.east + ',' + rectangle.north;
          url += '&imageDisplay=' + this._tileWidth + ',' + this._tileHeight + ',96';
          url += '&sr=' + sr;
  
          url += '&layers=visible';
          if (defined(this._layers)) {
              url += ':' + this._layers;
          }
  
          if (defined(this._token)) {
              url += '&token=' + this._token;
          }
  
          if (defined(this._proxy)) {
              url = this._proxy.getURL(url);
          }
  
          return loadJson(url).then(function(json) {
              var result = [];
  
              var features = json.results;
              if (!defined(features)) {
                  return result;
              }
  
              for (var i = 0; i < features.length; ++i) {
                  var feature = features[i];
  
                  var featureInfo = new ImageryLayerFeatureInfo();
                  featureInfo.data = feature;
                  featureInfo.name = feature.value;
                  featureInfo.properties = feature.attributes;
                  featureInfo.configureDescriptionFromProperties(feature.attributes);
  
                  // If this is a point feature, use the coordinates of the point.
                  if (feature.geometryType === 'esriGeometryPoint' && feature.geometry) {
                      var wkid = feature.geometry.spatialReference && feature.geometry.spatialReference.wkid ? feature.geometry.spatialReference.wkid : 4326;
                      if (wkid === 4326 || wkid === 4283) {
                          featureInfo.position = Cartographic.fromDegrees(feature.geometry.x, feature.geometry.y, feature.geometry.z);
                      } else if (wkid === 102100 || wkid === 900913 || wkid === 3857) {
                          var projection = new WebMercatorProjection();
                          featureInfo.position = projection.unproject(new Cartesian3(feature.geometry.x, feature.geometry.y, feature.geometry.z));
                      }
                  }
  
                  result.push(featureInfo);
              }
  
              return result;
          });
      };
  
      return ArcGisMapServerImageryProvider;
  });
  