如何用ArcEngine编程得到当前图层的坐标系

发布网友发布时间：2022-05-21 08:57

共2个回答

热心网友时间：2023-10-21 13:36

朋友，得到图层的空间参考需要在ILayer和IGeoDataset接口之间进行转换：首先使用ILayer接口得到图层ILayer layer=map.Layer[i]; 然后转换到IGeoDataset接口，访问IGeoDataset接口的SpatialReference.Name属性即可。

热心网友时间：2023-10-21 13:37

首先获取FeatureClass 以通过地图控件图层为例：
IMap pMap = MapCtrl.Map;
ILayer pLayer = pMap.get_Layer(0);
IFeatureClass pFeaCls = (pLayer as IFeatureLayer).FeatureClass;
再通过IGeoDataset接口获取FeatureClass坐标系统
ISpatialReference pSpatialRef = (pFeaCls as IGeoDataset).SpatialReference;

另外可以通过IProjectedCoordinateSystem接口获取坐标系的详细信息
IProjectedCoordinateSystem pProCoordSys = pSpatialRef as IProjectedCoordinateSystem;
IProjection pro = pProCoordSys.Projection;
pro.Name;

pProCoordSys.FalseEasting
pProCoordSys.FalseNorthing
pProCoordSys.get_CentralMeridian(true);
pProCoordSys.CoordinateUnit.Name;

IGeographicCoordinateSystem pGeographCoordinateSys =pProCoordSys.GeographicCoordinateSystem;
等等