arcgis engine 下投影坐标和经纬度坐标相互转换

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1、投影转经纬度privateIPointPRJtoGCS(doublex,doubley){IPointpPoint=newPointClass();pPoint.PutCoords(x,y);ISpatialReferenceFactorypSRF=newSpatialReferenceEnvironmentClass();pPoint.SpatialReference=pSRF.CreateProjectedCoordinateSystem(2414);pPoint.Project(pSRF.CreateGeographicCoordinateSystem((int)esriSR

2、GeoCSType.esriSRGeoCS_Beijing1954));returnpPoint;}其中，pPoint.SpatialReference=pSRF.CreateProjectedCoordinateSystem(2414);这行代码是设置pPoint的空间参考，也就是要转化的点的投影坐标。如果不知道投影坐标的话，转化会报异常。2414为该投影的enum值pPoint.Project(pSRF.CreateGeographicCoordinateSystem((int)esriSRGeoCSType.esriSRGeoCS_Beijing1954));将该点的投影坐标

3、转化为经纬度。经纬度到投影：viewsourceprint?1

privateIPointGCStoPRJ(IPointpPoint,
4、tyle="COLOR:#0000ff">intGCSType,intPRJType)
{
ISpatialReferenceFactorypSRF=new
5、>SpatialReferenceEnvironmentClass();
pPoint.SpatialReference=pSRF.CreateGeographicCoordinateSystem(GCSType);
pPoint.Project(pSRF.CreateProjectedCoordinateSystem(PRJType));
6、"COLOR:#0000ff">returnpPoint;
}