记录一次arcgis for js自定义切片底图

需求：将天地图底图切换为WMTS瓦片底图
材料：

1. arcgis服务端wmts的mapserver服务
2. arcgis for js 4.X

第一次操作：
方案构思：考虑到是wmts服务，首先使用BaseTileLayer
spatialReference选择4490

export const tdtlayer = async () => {
  let BaseTileLayer = await arcgisPackage.BaseTileLayer;
  let Request = await arcgisPackage.Request;
  let TDT = await BaseTileLayer.createSubclass({
    properties: {
      urlTemplate: null,
    },
    spatialReference: config.centerPoint.spatialReference,
    title: "天地图影像地图",
    getTileUrl: function (level, row, col) {
      let url ="https://192.168.***.***:6443/arcgis/rest/services/*******/ImageBaseMap/MapServer" +
        col +
        "&y=" +
        row +
        "&l=" +
        level;
      return url;
    },
    fetchTile: function (level, row, col) {
      let url = this.getTileUrl(level, row, col);
      return Request(url, {
        responseType: "image",
      }).then((response) => {
        let image = response.data;
        let width = this.tileInfo.size[0];
        let height = this.tileInfo.size[0];

        let canvas = document.createElement("canvas");
        let context = canvas.getContext("2d");
        canvas.width = width;
        canvas.height = height;

        context.drawImage(image, 0, 0, width, height);

        return canvas;
      });
    },
  });
  let layer = await new TDT();
  return layer;
};

结果：失败，始终得到3857投影。

第二次操作
构思方案：采用4.X常用的WebTileLayer

export const tdtJWDShiLianglayer = async () => {
  let TileInfo = await arcgisPackage.TileInfo;
  let WebTileLayer = await arcgisPackage.WebTileLayer;
  var tileInfo = new TileInfo({
    dpi: 90.71428571427429,//解析度，即像素
    rows: 256,
    cols: 256,
    compressionQuality: 0,//压缩像素值
    origin: {
      x: -180,
      y: 90
    },
    spatialReference: {
       wkid: 4490
    },
    lods: [//定义平铺方案的细节级别数组
        { level: 2, levelValue: 2, resolution: 0.3515625, scale: 147748796.52937502 },
        { level: 3, levelValue: 3, resolution: 0.17578125, scale: 73874398.264687508 },
        { level: 4, levelValue: 4, resolution: 0.087890625, scale: 36937199.132343754 },
        { level: 5, levelValue: 5, resolution: 0.0439453125, scale: 18468599.566171877 },
        { level: 6, levelValue: 6, resolution: 0.02197265625, scale: 9234299.7830859385 },
        { level: 7, levelValue: 7, resolution: 0.010986328125, scale: 4617149.8915429693 },
        { level: 8, levelValue: 8, resolution: 0.0054931640625, scale: 2308574.9457714846 },
        { level: 9, levelValue: 9, resolution: 0.00274658203125, scale: 1154287.4728857423 },
        { level: 10, levelValue: 10, resolution: 0.001373291015625, scale: 577143.73644287116 },
        { level: 11, levelValue: 11, resolution: 0.0006866455078125, scale: 288571.86822143558 },
        { level: 12, levelValue: 12, resolution: 0.00034332275390625, scale: 144285.93411071779 },
        { level: 13, levelValue: 13, resolution: 0.000171661376953125, scale: 72142.967055358895 },
        { level: 14, levelValue: 14, resolution: 8.58306884765625e-005, scale: 36071.483527679447 },
        { level: 15, levelValue: 15, resolution: 4.291534423828125e-005, scale: 18035.741763839724 },
        { level: 16, levelValue: 16, resolution: 2.1457672119140625e-005, scale: 9017.8708819198619 },
        { level: 17, levelValue: 17, resolution: 1.0728836059570313e-005, scale: 4508.9354409599309 },
        { level: 18, levelValue: 18, resolution: 5.3644180297851563e-006, scale: 2254.4677204799655 },
        { level: 19, levelValue: 19, resolution: 2.68220901489257815e-006, scale: 1127.23386023998275 },
        { level: 20, levelValue: 20, resolution: 1.341104507446289075e-006, scale: 563.616930119991375 }
    ]
  });
  var tiledLayer = new WebTileLayer('https://192.168.***.***:6443/arcgis/rest/services/*******/ImageBaseMap/MapServer?T=vec_c&X={col}&Y={row}&L={level}',{
    tileInfo: tileInfo,
    spatialReference: {
      wkid: 4490
    },
  });
  return tiledLayer
}

结果：失败，原因还是投影坐标系改不了

第三次操作：
构思方案：选择MapImageLayer
结果：成功，但是性能非常差，需要一次加载，舍弃。

第”三.九“次操作：
构思方案：选择WMTSLayer
如果是arcgis发的服务一定要记得在url后面加上WMTS，这个官方文档没有提及，非常坑！！！！！！！

export const TestCustomWMTS = async () => {
  //wmtslayer
  const WMTSLayer = await arcgisPackage.WMTSLayer;
  let wmtsLayers = new WMTSLayer({
    url: "https://192.168.***.***:6443/arcgis/rest/services/*******/ImageBaseMap/MapServer/WMTS", // url to the service
  });
  return wmtsLayers
}

结果：成功，但是无法定位，观察layer对象，发现他的投影坐标系是4326，估计大致原因就是这个导致的。于是观察api文档，发现wmtslayer没有SpatialReference属性，随后放弃。

第四次操作
构思方案：选择TileLayer，主要考虑到该项wmts服务是用arcgis server发布的，所以尝试一下。

export const TestCustomWMTS = async () => {
  let TileLayer = await arcgisPackage.TileLayer;
  var tiledLayer = new TileLayer({
   url:'https://192.168.***.***:6443/arcgis/rest/services/*******/ImageBaseMap/MapServer',
  });
  return tiledLayer
}

结果：成功