Method getDatasetsInfo

src/openlayers/mapping/WebMap.js:4880–4899

* @private * @function WebMap.prototype.getDatasetsInfo * @description 获取数据集信息 * @param {string} serviceUrl 数据服务的地址 * @param {string} datasetName 数据服务的数据集名称 * @returns {Object} 数据服务的信息

(serviceUrl, datasetName)

   * @returns {Object} 数据服务的信息
   */
  getDatasetsInfo(serviceUrl, datasetName) {
    let that = this;
    return that.getDatasources(serviceUrl).then(function (datasourceName) {
      //判断mvt服务是否可用
      let url = `${serviceUrl}/data/datasources/${datasourceName}/datasets/${datasetName}.json`;
      return FetchRequest.get(that.getRequestUrl(url), null, {
        withCredentials: that.isCredentail(url)
      })
        .then(function (response) {
          return response.json();
        })
        .then(function (datasetsInfo) {
          return {
            epsgCode: datasetsInfo.datasetInfo.prjCoordSys.epsgCode,
            bounds: datasetsInfo.datasetInfo.bounds,
            url //返回的是原始url，没有代理。因为用于请求mvt
          };
        });
    });
  }

  /**
   * @private