关于ArcGis for javascript的引用天地图

1. 在引用天地图时, 我们要自定义一个相关的比例尺转换类

 const tileInfoObj = {
   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,
     },
   ],
 };

2.使用dojo的方式引入调用天地图要使用的插件

dojo.require('esri.layers.WebTiledLayer');   // 加载天地图

3.调用天地图插件引用天地图

 // 加载天地图底图
 function LoadingTianDiMap() {
   const tileInfo = new esri.layers.TileInfo(tileInfoObj);    // 这是我们自定义的比例尺转换工具类
   // 电子底图
   myDtLayer = new esri.layers.WebTiledLayer("https://${subDomain}.tianditu.com/DataServer?T=vec_c&X=${col}&Y=${row}&L=${level}", {
     copyright: 'Tianditu',
     id: 'Tianditu0',
     subDomains: ['t0', 't1', 't2'],
     tileInfo,
   });
   // 卫星底图
   mySatelliteLayer = new esri.layers.WebTiledLayer("https://${subDomain}.tianditu.com/DataServer?T=img_c&X=${col}&Y=${row}&L=${level}", {
     copyright: 'Tianditu',
     id: 'Tianditu',
     subDomains: ['t0', 't1', 't2'],
     tileInfo,
   });
   mySatelliteLayer.hide(); // 默认隐藏
   // 标注图层
   baseMapMarker = new esri.layers.WebTiledLayer("https://${subDomain}.tianditu.com/DataServer?T=cva_c&X=${col}&Y=${row}&L=${level}", {
     copyright: 'Tianditu',
     id: 'Tianditu2',
     subDomains: ['t0', 't1', 't2'],
     tileInfo,
   });
   map.addLayer(myDtLayer, 0);
   map.addLayer(mySatelliteLayer, 1); // 添加卫星图
   map.addLayer(baseMapMarker, 2);
   zoom = 11;
 }