imageryProvider

const providerOptions = {
  crs: "WGS84",
  maximumLevel: 18,
  url: "https://webst{s}.is.autonavi.com/appmaptile?style=6&x={x}&y={y}&z={z}"
};

const imageProvider = new GCJImageryProvider(providerOptions);

const layer = viewer.imageryLayers.addImageryProvider(imageProvider);

layer.isBaseLayer = function() {
  return true;
}

layer.myName = "高德影像";

const providerOptions = {
  maximumLevel: 18,
  minimumLevel: 1,
  subdomains: "012",
  url: "https://p{s}.map.gtimg.com/sateTiles/{z}/{sx}/{sy}/{x}_{reverseY}.jpg?version=400",
  customTags: {
    sx: function (imageryProvider, x, y, level) {
      return x >> 4;
    },
    sy: function (imageryProvider, x, y, level) {
      return ((1 << level) - y) >> 4;
    }
  }
};

const imageProvider = new GCJImageryProvider(providerOptions);

const layer = viewer.imageryLayers.addImageryProvider(imageProvider);

layer.myName = "腾讯影像";

const providerOptions = {
  crs: "WGS84",
  maximumLevel: 18,
  minimumLevel: 1,
  subdomains: "012",
  url: "https://rt3.map.gtimg.com/tile?z={z}&x={x}&y={reverseY}&styleid=1&version=297"
};

const imageProvider = new GCJImageryProvider(providerOptions);

const layer = viewer.imageryLayers.addImageryProvider(imageProvider);

layer.myName = "腾讯矢量";

const providerOptions = {
  crs: "WGS84",
  maximumLevel: 18,
  minimumLevel: 3,
  url: "//maponline{s}.bdimg.com/tile/?qt=vtile&x={x}&y={y}&z={z}&styles=pl&scaler=2&udt=&from=jsapi2_0"
};

const imageProvider = new BaiduImageryProvider(providerOptions);

const layer = viewer.imageryLayers.addImageryProvider(imageProvider);

layer.myName = "百度地图";