Method layerCreateFcuntion

src/common/mapping/WebMapV2.js:1785–1813

({
        type,
        sourceID,
        layerID,
        parentLayerId,
        beforeId,
        style,
        minzoom,
        maxzoom,
        filter
      })

      const visible = layerInfo.visible;
      const layerCreateFcuntion = ({
        type,
        sourceID,
        layerID,
        parentLayerId,
        beforeId,
        style,
        minzoom,
        maxzoom,
        filter
      }) => {
        const layerStyle = {
          style: this._transformStyleToMapBoxGl({ ...style }, type),
          layout: {
            visibility: visible
          }
        };
        this._addOverlayToMap({
          type,
          source: sourceID,
          layerID,
          parentLayerId,
          beforeId,
          layerStyle,
          minzoom,
          maxzoom,
          filter
        });
      };
      if (['POLYGON', 'LINE'].includes(type)) {
        // linedash不能用表达式处理，需用多个图层
        const lineDashExpression = expressionMap.lineDash;