1                //获取两个点的高程 2                 pRasterSurface.PutRaster(pRasterLayer.Raster, 0); 3                 ISurface pSurface = pRasterSurface as ISurface; 4                 point.Z = pSurface.GetElevation(point); 5                 pt.Z = pSurface.GetElevation(pt); 6                 //IPolyline pPolyline = AxMapC.TrackLine() as IPolyline; 7                 IPoint pPoint = null; 8                 Boolean pBool = true; 9                 IPolyline pVPolyline = null;10                 IPolyline pInPolyline = null;11                 object pRef = 0.13;12                 pSurface.GetLineOfSight(point, pt, out pPoint, out pVPolyline, out pInPolyline, out pBool, false, false, ref pRef);13                 //如果pt在pVPolyline上，则可视；否则不可视14                 return pBool;