Source: api/GoogleMapsMapService.js

define([
    'dojo/_base/declare',
    'dojo/_base/array',
    'dojo/_base/lang',
    'spw/api/MapService',
    'esri/layers/WebTiledLayer'
],
function(declare, array, lang, MapService, WebTiledLayer) {

    /**
     * @class spw.api.GoogleMapsMapService
     * @classdesc Service du viewer correspondant à un WebTiledLayer d'ESRI
     * @extends {spw.api.MapService}
     */
    var GoogleMapsMapService = declare('spw.api.GoogleMapsMapService', [MapService], /** @lends spw.api.GoogleMapsMapService.prototype */ {

        tileInfo: null, // {lods: [], format: 'png', width: 256, height: 256}

        /**
         * Crée le layer Esri sur base de la configuration du MapService.
         * @memberOf spw.api.MapService
         */
        createMapLayer: function() {

            var lods = this.tileInfo && this.tileInfo.lods ? this.tileInfo.lods : [{
                level: 0,
                resolution: 156543.033928,
                scale: 591657527.591555
            }, {
                level: 1,
                resolution: 78271.5169639999,
                scale: 295828763.795777
            }, {
                level: 2,
                resolution: 39135.7584820001,
                scale: 147914381.897889
            }, {
                level: 3,
                resolution: 19567.8792409999,
                scale: 73957190.948944
            }, {
                level: 4,
                resolution: 9783.93962049996,
                scale: 36978595.474472
            }, {
                level: 5,
                resolution: 4891.96981024998,
                scale: 18489297.737236
            }, {
                level: 6,
                resolution: 2445.98490512499,
                scale: 9244648.868618
            }, {
                level: 7,
                resolution: 1222.99245256249,
                scale: 4622324.434309
            }, {
                level: 8,
                resolution: 611.49622628138,
                scale: 2311162.217155
            }, {
                level: 9,
                resolution: 305.748113140558,
                scale: 1155581.108577
            }, {
                level: 10,
                resolution: 152.874056570411,
                scale: 577790.554289
            }, {
                level: 11,
                resolution: 76.4370282850732,
                scale: 288895.277144
            }, {
                level: 12,
                resolution: 38.2185141425366,
                scale: 144447.638572
            }, {
                level: 13,
                resolution: 19.1092570712683,
                scale: 72223.819286
            }, {
                level: 14,
                resolution: 9.55462853563415,
                scale: 36111.909643
            }, {
                level: 15,
                resolution: 4.77731426794937,
                scale: 18055.954822
            }, {
                level: 16,
                resolution: 2.38865713397468,
                scale: 9027.977411
            }, {
                level: 17,
                resolution: 1.19432856685505,
                scale: 4513.988705
            }, {
                level: 18,
                resolution: 0.597164283559817,
                scale: 2256.994353
            }, {
                level: 19,
                resolution: 0.298582141647617,
                scale: 1128.497176
            }, {
                level: 20,
                resolution: 0.149291070823808,
                scale: 564.248588
            }];

            // this.layer = new GoogleMapsLayer();
            this.layer = new WebTiledLayer('https://${subDomain}.google.com/vt/lyrs=m&x=${col}&y=${row}&z=${level}', {
                subDomains: ['mt', 'mt1', 'mt2', 'mt3'],
                tileInfo: new esri.layers.TileInfo({
                    rows: 256,
                    cols: 256,
                    dpi: 96,
                    origin: {
                        x: -20037508.342787,
                        y: 20037508.342787
                    },
                    spatialReference: {
                        wkid: this.srid || 3857
                    },
                    lods: lods
                })
            });

            if (this.proxyUrl) {
                array.forEach(this.layer.tileServers, lang.hitch(this, function(tileServer, i) {
                    this.layer.tileServers[i] = this.proxyUrl + '?' + tileServer;
                }));
            }

            if(this.copyright){
            	this.layer.copyright = this.copyright;
            }

            this.inherited(arguments);

            this.baseMapLayerLoaded();
        }

    });

    return GoogleMapsMapService;

});