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需求：arcgis javascript api4.x加载天地图cgs2000坐标系
效果：
示例代码：
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<html lang="en"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta http-equiv="X-UA-Compatible" content="ie=edge"><title>加载天地图</title><linkrel="stylesheet"href="https://js.arcgis.com/4.27/esri/themes/light/main.css"/><script src="https://js.arcgis.com/4.27/"></script><style>html,body,#map {width: 100%;height: 100%;padding: 0;margin: 0;}</style><script>require(["esri/Map","esri/views/MapView","esri/layers/WebTileLayer","esri/layers/support/TileInfo" ], function (Map, MapView, WebTileLayer, TileInfo) {let tileInfo = new TileInfo({dpi: 90.71428571427429,rows: 256,cols: 256,compressionQuality: 0,origin: {x: -180,y: 90},spatialReference: {wkid: 4490},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 }]});/*天地图-影像（CGCS2000）*/var img_tiandituLayer = new WebTileLayer("http://{subDomain}.tianditu.gov.cn/img_c/wmts?SERVICE=WMTS&VERSION=1.0.0&REQUEST=GetTile&LAYER=img&STYLE=default&FORMAT=tiles&TILEMATRIXSET=c&TILEMATRIX={level}&TILEROW={row}&TILECOL={col}&tk=ac0daf56728bbb77d9514ba3df69bcd3", {subDomains: ["t0","t1","t2","t3","t4","t5","t6","t7"],title: "天地图-影像",tileInfo: tileInfo,spatialReference: {wkid: 4490},fullExtent:{xmin: -180,xmax: 180,ymin: -90,ymax: 90,spatialReference: 4490}});var cia_tiandituLayer = new WebTileLayer("http://{subDomain}.tianditu.gov.cn/cia_c/wmts?SERVICE=WMTS&VERSION=1.0.0&REQUEST=GetTile&LAYER=cia&STYLE=default&FORMAT=tiles&TILEMATRIXSET=c&TILEMATRIX={level}&TILEROW={row}&TILECOL={col}&tk=ac0daf56728bbb77d9514ba3df69bcd3", {subDomains: ["t0","t1","t2","t3","t4","t5","t6","t7"],title: "天地图-影像注记",tileInfo: tileInfo,spatialReference: {wkid: 4490},fullExtent:{xmin: -180,xmax: 180,ymin: -90,ymax: 90,spatialReference: 4490}});var map = new Map({basemap: {baseLayers: [img_tiandituLayer],referenceLayers: [cia_tiandituLayer],},});var view = new MapView({container: "map",map: map, }); })</script>
</head><body><div id="map"></div>
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