Method _addOverlayToMap

src/common/mapping/WebMapV2.js:2586–2608

* @private * @function WebMapViewModel.prototype._addOverlayToMap * @description 添加基础矢量图层到 MAP * @param {Object} style - mabgl style * @param {String} type - 图层类型

({ type, source, layerID, parentLayerId, beforeId, layerStyle, minzoom, maxzoom, filter })

     * @param {String} type - 图层类型
     */
    _addOverlayToMap({ type, source, layerID, parentLayerId, beforeId, layerStyle, minzoom, maxzoom, filter }) {
      const mbglTypeMap = {
        POINT: 'circle',
        LINE: 'line',
        POLYGON: 'fill'
      };
      const mbglType = mbglTypeMap[type];
      if (mbglType === 'circle' || mbglType === 'line' || mbglType === 'fill') {
        const style = {
          id: layerID,
          type: mbglType,
          source: source,
          paint: layerStyle.style,
          layout: layerStyle.layout || {},
          minzoom: minzoom || 0,
          maxzoom: maxzoom || this.map.getMaxZoom() + 1
        };
        if (filter) {
          style.filter = filter;
        }
        this._addLayer(style, parentLayerId, beforeId);
      }
    }

    _addBaselayer({
      url,