需求：arcgis javascript api4.x加载天地图cgs2000坐标系
效果：
示例代码：
<!DOCTYPE html>
<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>
<link
rel="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>
</body>
</html>
</html>
