arcgis 坐标系转换

[zhongs]

4326 地理坐标系
102100 投影坐标系

文档地址
https://developers.arcgis.com/javascript/3/jsapi/esri.geometry.webmercatorutils-amd.html

/**
 * 坐标转换 { wkid:4326 } 转换 { wkid:102100 }
 * @param {SpatialReference} source 要转换的SpatialReference对象
 * @param {<SpatialReference} target
 */
export const transformCoordinate = (source, target) => {
  return loadModules([
    "esri/geometry/webMercatorUtils",
    "esri/SpatialReference"
  ]).then(function ({ webMercatorUtils, SpatialReference }) {
    const sr = new SpatialReference(target)
    if (webMercatorUtils.canProject(source, sr)) {
      return webMercatorUtils.project(source, sr)
    }
  })
}