JS API加载天地图2000底图

使用ArcGIS JS API加载天地图2000经纬度地图作为底图。
引用文档：http://zhihu.esrichina.com.cn/article/3942
新版本JS API 4.12 、4.13中需要注意的问题
（1）SceneView中需要定义坐标参考
var view = new SceneView({
container: "map",
spatialReference: {
wkid: 4326
},
map: map,
center: [117, 35]
});
（2）定义webTileLayer中需要制定空间参考，否则会出现空间参考不匹配错误，非常重要，4.12和4.13都报同样的错误。
var tiledLayer = new WebTileLayer(
"http://{subDomain}.tianditu.com/vec_c/wmts?SERVICE=WMTS&VERSION=1.0.0&REQUEST=GetTile&LAYER=vec&" +
"STYLE=default&FORMAT=tiles&TILEMATRIXSET=c&TILEMATRIX={level}&TILEROW={row}&TILECOL={col}&tk=ac0daf56728bbb77d9514ba3df69bcd3", {
subDomains: ["t0","t1","t2","t3","t4","t5","t6","t7"],
tileInfo: tileInfo,
spatialReference: {
wkid: 4490
},
});
（3）针对2000坐标系底图的tileInfo信息，tileInfo、Layer、view三者保持一致。
var tileInfo = new TileInfo({
dpi: 90.71428571427429,
rows: 256,
cols: 256,
compressionQuality: 0,
origin: {
x: -180,
y: 90
},
spatialReference: {
wkid: 4326
},
lods: [
{ level: 0, levelValue: 1, resolution: 0.703125, scale: 295497593.05875003 },
{ level: 1, levelValue: 2, resolution: 0.3515625, scale: 147748796.52937502 },
{ level: 2, levelValue: 3, resolution: 0.17578125, scale: 73874398.264687508 },
{ level: 3, levelValue: 4, resolution: 0.087890625, scale: 36937199.132343754 },
{ level: 4, levelValue: 5, resolution: 0.0439453125, scale: 18468599.566171877 },
{ level: 5, levelValue: 6, resolution: 0.02197265625, scale: 9234299.7830859385 },
{ level: 6, levelValue: 7, resolution: 0.010986328125, scale: 4617149.8915429693 },
{ level: 7, levelValue: 8, resolution: 0.0054931640625, scale: 2308574.9457714846 },
{ level: 8, levelValue: 9, resolution: 0.00274658203125, scale: 1154287.4728857423 },
{ level: 9, levelValue: 10, resolution: 0.001373291015625, scale: 577143.73644287116 },
{ level: 10, levelValue: 11, resolution: 0.0006866455078125, scale: 288571.86822143558 },
{ level: 11, levelValue: 12, resolution: 0.00034332275390625, scale: 144285.93411071779 },
{ level: 12, levelValue: 13, resolution: 0.000171661376953125, scale: 72142.967055358895 },
{ level: 13, levelValue: 14, resolution: 8.58306884765625e-005, scale: 36071.483527679447 },
{ level: 14, levelValue: 15, resolution: 4.291534423828125e-005, scale: 18035.741763839724 },
{ level: 15, levelValue: 16, resolution: 2.1457672119140625e-005, scale: 9017.8708819198619 },
{ level: 16, levelValue: 17, resolution: 1.0728836059570313e-005, scale: 4508.9354409599309 },
{ level: 17, levelValue: 18, resolution: 5.3644180297851563e-006, scale: 2254.4677204799655 },
{ level: 18, levelValue: 19, resolution: 2.68220901489257815e-006, scale: 1127.23386023998275 },
{ level: 19, levelValue: 20, resolution: 1.341104507446289075e-006, scale: 563.616930119991375 }
]
});

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