综述：本节讲述的是用Arcgis for js加载天地图的切片资源，
Arcgis for js加载天地图
。天地图的切片地图可以通过esri.layers.TiledMapServiceLayer来加载，在此将之进行了一定的封装，如下：
1、切片线划图——TDTLayer.js
define(["dojo/_base/declare", "esri/layers/tiled"], function (declare) { return declare(esri.layers.TiledMapServiceLayer, { constructor: function () { this.spatialReference = new esri.SpatialReference({ wkid: 4326 }); this.initialExtent = (this.fullExtent = new esri.geometry.Extent(-180.0, -90.0, 180.0, 90.0, this.spatialReference)); this.tileInfo = new esri.layers.TileInfo({ "rows": 256, "cols": 256, "compressionQuality": 0, "origin": { "x": -180, "y": 90 }, "spatialReference": { "wkid": 4326 }, "lods": [ { "level": 2, "resolution": 0.3515625, "scale": 147748796.52937502 }, { "level": 3, "resolution": 0.17578125, "scale": 73874398.264687508 }, { "level": 4, "resolution": 0.087890625, "scale": 36937199.132343754 }, { "level": 5, "resolution": 0.0439453125, "scale": 18468599.566171877 }, { "level": 6, "resolution": 0.02197265625, "scale": 9234299.7830859385 }, { "level": 7, "resolution": 0.010986328125, "scale": 4617149.8915429693 }, { "level": 8, "resolution": 0.0054931640625, "scale": 2308574.9457714846 }, { "level": 9, "resolution": 0.00274658203125, "scale": 1154287.4728857423 }, { "level": 10, "resolution": 0.001373291015625, "scale": 577143.73644287116 }, { "level": 11, "resolution": 0.0006866455078125, "scale": 288571.86822143558 }, { "level": 12, "resolution": 0.00034332275390625, "scale": 144285.93411071779 }, { "level": 13, "resolution": 0.000171661376953125, "scale": 72142.967055358895 }, { "level": 14, "resolution": 8.58306884765625e-005, "scale": 36071.483527679447 }, { "level": 15, "resolution": 4.291534423828125e-005, "scale": 18035.741763839724 }, { "level": 16, "resolution": 2.1457672119140625e-005, "scale": 9017.8708819198619 }, { "level": 17, "resolution": 1.0728836059570313e-005, "scale": 4508.9354409599309 }, { "level": 18, "resolution": 5.3644180297851563e-006, "scale": 2254.4677204799655 } ] }); this.loaded = true; this.onLoad(this); }, getTileUrl: function (level, row, col) { return "http://t" + col % 8 + ".tianditu.cn/vec_c/wmts?SERVICE=WMTS&REQUEST=GetTile&VERSION=1.0.0&LAYER=vec&STYLE=default&TILEMATRIXSET=c&TILEMATRIX=" + level + "&TILEROW=" + row + "&TILECOL=" + col + "&FORMAT=tiles"; } }); });2、切片标注——TDTAnnoLayer.js
define(["dojo/_base/declare", "esri/layers/tiled"], function (declare) { return declare(esri.layers.TiledMapServiceLayer, { constructor: function () { this.spatialReference = new esri.SpatialReference({ wkid: 4326 }); this.initialExtent = (this.fullExtent = new esri.geometry.Extent(-180.0, -90.0, 180.0, 90.0, this.spatialReference)); this.tileInfo = new esri.layers.TileInfo({ "rows": 256, "cols": 256, "compressionQuality": 0, "origin": { "x": -180, "y": 90 }, "spatialReference": { "wkid": 4326 }, "lods": [ { "level": 2, "resolution": 0.3515625, "scale": 147748796.52937502 }, { "level": 3, "resolution": 0.17578125, "scale": 73874398.264687508 }, { "level": 4, "resolution": 0.087890625, "scale": 36937199.132343754 }, { "level": 5, "resolution": 0.0439453125, "scale": 18468599.566171877 }, { "level": 6, "resolution": 0.02197265625, "scale": 9234299.7830859385 }, { "level": 7, "resolution": 0.010986328125, "scale": 4617149.8915429693 }, { "level": 8, "resolution": 0.0054931640625, "scale": 2308574.9457714846 }, { "level": 9, "resolution": 0.00274658203125, "scale": 1154287.4728857423 }, { "level": 10, "resolution": 0.001373291015625, "scale": 577143.73644287116 }, { "level": 11, "resolution": 0.0006866455078125, "scale": 288571.86822143558 }, { "level": 12, "resolution": 0.00034332275390625, "scale": 144285.93411071779 }, { "level": 13, "resolution": 0.000171661376953125, "scale": 72142.967055358895 }, { "level": 14, "resolution": 8.58306884765625e-005, "scale": 36071.483527679447 }, { "level": 15, "resolution": 4.291534423828125e-005, "scale": 18035.741763839724 }, { "level": 16, "resolution": 2.1457672119140625e-005, "scale": 9017.8708819198619 }, { "level": 17, "resolution": 1.0728836059570313e-005, "scale": 4508.9354409599309 }, { "level": 18, "resolution": 5.3644180297851563e-006, "scale": 2254.4677204799655 } ] }); this.loaded = true; this.onLoad(this); }, getTileUrl: function (level, row, col) { return "http://t" + row % 8 + ".tianditu.cn/cva_c/wmts?SERVICE=WMTS&REQUEST=GetTile&VERSION=1.0.0&LAYER=cva&STYLE=default&TILEMATRIXSET=c&TILEMATRIX=" + level + "&TILEROW=" + row + "&TILECOL=" + col + "&FORMAT=tiles"; } }); });封装好之后就可以在页面调用了，调用的时候需要导入这些自定义的图层，导入方式为：
<script. type="text/javascript"> dojoConfig = { parseOnLoad: true, packages: [{ name: 'tdlib', location: this.location.pathname.replace(/\/[^/]+$/, "")+"/js/tdlib" }] }; </script> <script. src="http://localhost/arcgis_js_api/library/3.9/3.9/init.js"></script> <script> require(["tdlib/TDTLayer", "tdlib/TDTAnnoLayer"], function (TDTLayer, TDTAnnoLayer ){ var basemap = new TDTLayer(); map.addLayer(basemap); var annolayer = new TDTAnnoLayer(); map.addLayer(annolayer); }); </script>完整调用页面代码为：在图中，我还添加了一个我本机用Arcgis Server发布的特征层，完成后效果如下：
本文抛砖引玉，更多的天地图如影像等请参照：http://www.tianditu.com/guide/