关于前端:记录一次arcgis-for-js自定义切片底图

需要：将天地图底图切换为WMTS瓦片底图
资料：

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

第一次操作：
计划构思：思考到是wmts服务，首先应用BaseTileLayer
spatialReference抉择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;};

后果：失败，始终失去3857投影。

第二次操作
构思计划：采纳4.X罕用的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: [//定义平铺计划的细节级别数组        { 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}

后果：失败，起因还是投影坐标系改不了

第三次操作：
构思计划：抉择MapImageLayer
后果：胜利，然而性能十分差，须要一次加载，舍弃。

第”三.九“次操作：
构思计划：抉择WMTSLayer
如果是arcgis发的服务肯定要记得在url前面加上WMTS，这个官网文档没有提及，十分坑！！！！！！！

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}

后果：胜利，然而无奈定位，察看layer对象，发现他的投影坐标系是4326，预计大抵起因就是这个导致的。于是察看api文档，发现wmtslayer没有SpatialReference属性，随后放弃。

第四次操作
构思计划：抉择TileLayer，次要思考到该项wmts服务是用arcgis server公布的，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}

后果：胜利