openlayers加载天地图及天地图地形图影像图

openlayer加载天地图、天地图地形图、天地图影像图，相关代码有注释。

加载效果：

天地图底图

天地图地形图

天地图影像图

相关代码：

import {XYZ,TileImage} from 'ol/source';export function tianditu(map) {// T=vec_c表示请求的是路网数据，x 表示切片的 x 轴坐标，y 表示切片的y轴坐标，z表示切片所在的缩放级别。// 使用 ol.source.XYZ 加载切片，并将获取的数据初始化一个切片图层 ol.layer.Tile：//天地图底图var source = new XYZ({url: "/DataServer?T=vec_w&tk=申请的天地图key&x={x}&y={y}&l={z}"});var tileLayer = new TileLayer({id: "tileLayer",title: "天地图",layerName:"baseMap",source: source});//标注图层var sourceMark = new XYZ({url: '/DataServer?T=cva_w&tk=申请的天地图key&x={x}&y={y}&l={z}'});var tileMark = new TileLayer({id: "tileMark",title: "标注图层",layerName:"baseMap",source: sourceMark,});//卫星图像var sourceSatellite = new XYZ({url: '/DataServer?T=img_w&tk=申请的天地图key&x={x}&y={y}&l={z}'});var tileSatellite = new TileLayer({id: "tileSatellite",title: "卫星图",layerName:"baseMap",source: sourceSatellite});//天地图地形地图var map_ter = new TileLayer({id: "map_ter",title: "天地图地形",layerName:"baseMap",source: new XYZ({url: "/DataServer?T=ter_w&tk=申请的天地图key&x={x}&y={y}&l={z}"})})var map_cta = new TileLayer({id: "map_cta",title: "天地图标注",layerName:"baseMap",source: new XYZ({url: "/DataServer?T=cva_w&tk=申请的天地图key&x={x}&y={y}&l={z}"})});return {"tileLayer": tileLayer,"tileMark": tileMark,"tileSatellite": tileSatellite,"map_ter": map_ter,"map_cta": map_cta};}