Method createWMTSSource

src/openlayers/mapping/WebMap.js:1867–1898

* @private * @function WebMap.prototype.createWMTSSource * @description 获取WMTS类型图层的source。 * @param {Object} layerInfo - 图层信息。 * @returns {ol.source.WMTS} wmts的souce

(layerInfo)

   * @returns {ol.source.WMTS} wmts的souce
   */
  createWMTSSource(layerInfo) {
    let extent = layerInfo.extent || olProj.get(layerInfo.projection).getExtent();

    // 单位通过坐标系获取 （PS: 以前代码非4326 都默认是米）
    let unit = olProj.get(this.baseProjection).getUnits();
    const that = this;
    return new WMTS({
      url: layerInfo.tileUrl || layerInfo.url,
      layer: layerInfo.layer,
      format: layerInfo.layerFormat,
      style: layerInfo.style,
      matrixSet: layerInfo.tileMatrixSet,
      requestEncoding: layerInfo.requestEncoding || 'KVP',
      tileGrid: this.getWMTSTileGrid(
        extent,
        layerInfo.scales,
        unit,
        layerInfo.dpi,
        layerInfo.origin,
        layerInfo.matrixIds
      ),
      tileLoadFunction: this.getCustomTileLoadFunction(function (src) {
        if (src.indexOf('tianditu.gov.cn') >= 0) {
          return `${src}&tk=${CommonUtil.getParameters(layerInfo.url)['tk']}`;
        }
        if(that.isAddProxy(src, layerInfo.proxy)) {
          return `${that.getProxy('png')}${encodeURIComponent(src)}`;
        }
        return src;
      })
    });
  }

  /**
   * @private