Norman, I believe you want to call SetGCPProjection() instead of SetProjection() when using GCPs instead of an affine transform.
Best regards, Frank On Wed, Nov 6, 2013 at 1:23 PM, Norman Goldstein <[email protected]> wrote: > I have created a geotiff file using the "GTiff" driver, and have > successfully set options for it to be a strips file with no compression. > Also, successfully called the functions > > dataset->SetMetadataItem( "AREA_OR_POINT", > "Point", > nullptr ) ) > > and > > dataset->SetGCPs( 3, > gcps, > "Richmond" ) > > Here is the listgeo dump: > > ############# listgeo dump ############## > Geotiff_Information: > Version: 1 > Key_Revision: 1.0 > Tagged_Information: > ModelTiepointTag (6,3): > 0 249 0 > 0 0 0 > 399 249 0 > 1000 0 0 > 0 0 0 > 0 2000 0 > End_Of_Tags. > Keyed_Information: > GTRasterTypeGeoKey (Short,1): RasterPixelIsPoint > End_Of_Keys. > End_Of_Geotiff. > > > Corner Coordinates: > ... unable to transform points between pixel/line and PCS space > ##################################### > > I also set the reference system using the following code: > > /////////////////////// c++ code //////////////////////////// > OGRSpatialReference oSRS; > oSRS.SetProjCS( "NoWhere" ); > oSRS.SetWellKnownGeogCS( "WGS84" ); > oSRS.SetEquirectangular( 0.0, // Centre lat > 0.0, // Centre lon > 0.0, // False Easting > 0.0 ); // False Northing > > char* wkt = nullptr; > > if( OGRERR_NONE != oSRS.exportToPrettyWkt( &wkt ) ) > { > error... > } > > if( CE_Failure == dataset->SetProjection( wkt ) ) > { > error... > } > /////////////////////////////////////////////////////////////// > > So, why is listgeo not able to transform points between pixel/line and PCS > space? > > I am happy to upload a full working example if needed. > > Thank you. > > > > > > > > > > > > > _______________________________________________ > gdal-dev mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/gdal-dev > -- ---------------------------------------+-------------------------------------- I set the clouds in motion - turn up | Frank Warmerdam, [email protected] light and sound - activate the windows | http://pobox.com/~warmerdam and watch the world go round - Rush | Geospatial Software Developer
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