///
/// 地理坐标系 转 投影坐标系
///
///
///
/// 地理坐标系编号
/// 投影坐标系编号
///
private IPoint GCStoPRJ(double x, double y, int GCSType, int PRJType)
{
IPoint pPoint = new PointClass();
pPoint.PutCoords(x, y);
ISpatialReferenceFactory pSRF = new SpatialReferenceEnvironmentClass();
pPoint.SpatialReference = pSRF.CreateGeographicCoordinateSystem(GCSType);
//GCS_WGS_1984 WKID: 4326 权限: EPSG
pPoint.Project(pSRF.CreateProjectedCoordinateSystem(PRJType));
//Xian_1980_3_Degree_GK_CM_114E WKID: 2383 权限: EPSG
return pPoint;
}
///
/// 投影坐标系 转 地理坐标系
///
///
///
/// 地理坐标系编号
/// 投影坐标系编号
///
private IPoint PRJtoGCS(double x, double y,int GCSType, int PRJType)
{
IPoint pPoint = new PointClass();
pPoint.PutCoords(x, y);
ISpatialReferenceFactory pSRF = new SpatialReferenceEnvironmentClass();
pPoint.SpatialReference = pSRF.CreateProjectedCoordinateSystem(PRJType);
pPoint.Project(pSRF.CreateGeographicCoordinateSystem(GCSType));
return pPoint;
}