Method _removeBaseLayer

src/openlayers/mapping/WebMap.js:160–168

* @private * @function WebMap.prototype._removeBaseLayer * @description 移除底图

()

   * @description 移除底图
   */
  _removeBaseLayer() {
    const map = this.map;
    const { layer, labelLayer } = this.baseLayer;
    // 移除天地图标签图层
    labelLayer && map.removeLayer(labelLayer);
    // 移除图层
    layer && map.removeLayer(layer);
    this.baseLayer = null;
  }

  /**
   * @private