Question

我有一个服务返回arcgis json格式，我想将这个几何点转换为经度和纬度ios 例如：

"geometryType": "esriGeometryPoint",
   "geometry": {
    "x": 445340.99496,
    "y": 2423705.6300004,
    "spatialReference": {
     "wkid": 32637,
     "latestWkid": 32637
    }
   }

我转换点

AGSGraphic *testGraphic = [[AGSGraphic alloc] initWithJSON:jsonData] ;

我如何从AGSGraphic经度和纬度获得

Answer 1

这解决了问题，只需发送xPoint和yPoint，它将返回包含lng和latit的CLLocation对象

 -(CLLocation *) convertToLongAndLat:(double) xPoint andYPoint :(double) yPoint {

        double originShift = 2 * M_PI * 6378137 / 2.0;

        double lon = (xPoint / originShift) * 180.0;
        double lat = (yPoint / originShift) * 180.0;

        lat = 180 / M_PI * (2 * atan( exp( lat * M_PI / 180.0)) - M_PI / 2.0);

        return [[CLLocation alloc] initWithLatitude:lat longitude:lon];
    }

Answer 2

我认为您希望根据需要更改空间参考。

前：

    //AA : Get the clicked point
    let gpsPoint = clickedMapPoint
    let engine = AGSGeometryEngine.defaultGeometryEngine()

    //AA : Change the spatial ref to get real lon and lat
    let mapPoint = engine.projectGeometry(gpsPoint, toSpatialReference: AGSSpatialReference.wgs84SpatialReference()) as! AGSPoint

如何将ios esri arcGIS Point转换为纬度和经度

2 个答案: