topic Difficulty Reprojecting a Raster in ArcGIS Spatial Analyst Questions https://community.esri.com/t5/arcgis-spatial-analyst-questions/difficulty-reprojecting-a-raster/m-p/408104#M5729 <HTML><HEAD></HEAD><BODY><SPAN>Hi! I've got an elevation raster (in geo-coordinates) that I'm trying to generate a slope raster from. In order to get the X, Y, and Z-coordinates in the same units, I first project the elevation raster to UTM coordinates (before using the ISurfaceOp.Slope method) using the ITransformationOp.ProjectFast method. The resulting slopes look reasonable. However, when I try to reproject back to geo-coordinates (again, using the ITransformationOp.ProjectFast method), I get an error when recasting the resulting IGeoDataset to an IRaster. The relevant C# code is provided in the attachment. Any help and/or insights would be greatly appreciated. Thanks!</SPAN><BR /><BR /><SPAN>Mark C.</SPAN></BODY></HTML> Fri, 02 Jul 2010 17:54:22 GMT MarkCammarere 2010-07-02T17:54:22Z Difficulty Reprojecting a Raster https://community.esri.com/t5/arcgis-spatial-analyst-questions/difficulty-reprojecting-a-raster/m-p/408104#M5729 <HTML><HEAD></HEAD><BODY><SPAN>Hi! I've got an elevation raster (in geo-coordinates) that I'm trying to generate a slope raster from. In order to get the X, Y, and Z-coordinates in the same units, I first project the elevation raster to UTM coordinates (before using the ISurfaceOp.Slope method) using the ITransformationOp.ProjectFast method. The resulting slopes look reasonable. However, when I try to reproject back to geo-coordinates (again, using the ITransformationOp.ProjectFast method), I get an error when recasting the resulting IGeoDataset to an IRaster. The relevant C# code is provided in the attachment. Any help and/or insights would be greatly appreciated. Thanks!</SPAN><BR /><BR /><SPAN>Mark C.</SPAN></BODY></HTML> Fri, 02 Jul 2010 17:54:22 GMT https://community.esri.com/t5/arcgis-spatial-analyst-questions/difficulty-reprojecting-a-raster/m-p/408104#M5729 MarkCammarere 2010-07-02T17:54:22Z