Method _initOverlayLayers

src/common/mapping/WebMapV2.js:524–570

(layers, _taskID)

    }

    _initOverlayLayers(layers, _taskID) {
      // 存储地图上所有的图层对象
      if (this.expectLayerLen > 0) {
        layers.forEach((layer) => {
          const type = this.webMapService.getDatasourceType(layer);
          // TODO  ---  暂不支持 SAMPLE_DATA
          if (type === 'SAMPLE_DATA') {
            this._addLayerSucceeded();
            this.fire('layercreatefailed', {
              error: 'SAMPLE DATA is not supported',
              layer,
              map: this.map
            });
            return;
          }

          if (layer.visibleScale) {
            const { minScale, maxScale } = layer.visibleScale;
            const crs = this.map.getCRS();
            layer.minzoom = Math.max(this._transformScaleToZoom(minScale, crs, layer.tileSize), 0);
            layer.maxzoom = Math.min(this.map.getMaxZoom()+1, this._transformScaleToZoom(maxScale, crs, layer.tileSize) + 0.0000001);
          }

          if (type === 'tile') {
            if (layer.autoUpdateTime) {
              this._layerTimerList.push(
                setInterval(() => {
                  this._initBaseLayer(layer);
                }, layer.autoUpdateTime)
              );
            }
            this._initBaseLayer(layer, () => {
              this._addLayerSucceeded();
            });
          } else {
            this.getLayerFeatures(layer, _taskID, type);
            if (layer.autoUpdateTime) {
              this._layerTimerList.push(
                setInterval(() => {
                  this.getLayerFeatures(layer, _taskID, type);
                }, layer.autoUpdateTime)
              );
            }
          }
        }, this);
      }
    }

    _initOverlayLayer(layerInfo, features = [], mergeByField, featureProjection) {
      const { layerID, layerType, visible, style, featureType, projection } = layerInfo;