Method _registerMapCRS

src/common/mapping/WebMapV2.js:126–184

(mapInfo)

    }

    async _registerMapCRS(mapInfo) {
      const { projection, extent = { leftBottom: {}, rightTop: {} }, baseLayer = {} } = mapInfo;
      const epsgCode = toEpsgCode(projection);
      let crs = {
        name: epsgCode,
        extent: [extent.leftBottom.x, extent.leftBottom.y, extent.rightTop.x, extent.rightTop.y],
        wkt: this._getProjectionWKT(projection)
      };
      if (!crsManager.getCRS(epsgCode)) {
        switch (baseLayer.layerType) {
          case 'MAPBOXSTYLE': {
            let url = baseLayer.dataSource.url;
            if (url.indexOf('/restjsr/') > -1 && !/\/style\.json$/.test(url)) {
              url = Util.urlPathAppend(url, '/style.json');
            }
            const res = await this.webMapService.getMapBoxStyle(url);
            if (res && res.metadata && res.metadata.indexbounds) {
              crs.extent = res.metadata.indexbounds;
            }
            break;
          }
          case 'TILE': {
            // 获取地图的wkt
            if (!crs.wkt) {
              crs.wkt = await this.getEpsgCodeWKT(Util.urlPathAppend(baseLayer.url, '/prjCoordSys.wkt'), {
                withoutFormatSuffix: true,
                withCredentials: this.webMapService.handleWithCredentials('', baseLayer.url, false)
              });
            }
            const boundsRes = await this.getBounds(`${baseLayer.url}.json`, {
              withoutFormatSuffix: true,
              withCredentials: this.webMapService.handleWithCredentials('', baseLayer.url, false)
            });
            if (boundsRes && boundsRes.bounds) {
              crs.extent = [
                boundsRes.bounds.leftBottom.x,
                boundsRes.bounds.leftBottom.y,
                boundsRes.bounds.rightTop.x,
                boundsRes.bounds.rightTop.y
              ];
            }
            break;
          }
          case 'ZXY_TILE': {
            const extent = this._getZXYTileCrsExtent(baseLayer);
            crs.extent = extent;
            break;
          }
          default:
            crs = null;
            break;
        }
      }
      if (!crs) {
        throw new Error('Unsupported coordinate system!')
      }
      crsManager.registerCRS(crs);
      return epsgCode;