Method createGraphicLayer

src/openlayers/mapping/WebMap.js:3220–3232

* @private * @function WebMap.prototype.createGraphicLayer * @description 添加大数据图层到地图上 * @param {Object} layerInfo - 图层信息 * @param {Array} features - feature的集合 * @return {ol.layer.image} 大数据图层

(layerInfo, features)

   * @return {ol.layer.image} 大数据图层
   */
  async createGraphicLayer(layerInfo, features) {
    features = layerInfo.filterCondition ? this.getFiterFeatures(layerInfo.filterCondition, features) : features;
    let graphics = await this.getGraphicsFromFeatures(features, layerInfo.style, layerInfo.featureType);
    let source = new GraphicSource({
      graphics: graphics,
      render: 'canvas',
      map: this.map,
      isHighLight: false
    });
    return new olLayer.Image({
      source: source
    });
  }

  /**
   * @private