[gdal-dev] Problem with OGRCreateCoordinateTransformation

[Reinaldo Escada Chohfi]

Thanks Frank,

Yes, I do have the proj.dll is in my path.

Also, I am looking for the gdalwin32dev160.  Is it available, or we 
don't need it anymore, just the gdalwin32exe160?

I've been using gdalwin32exe141 & gdalwin32dev141.

Thanks,

Reinaldo


At 11:36 AM 4/10/2009, Frank Warmerdam wrote:
>Reinaldo Escada Chohfi wrote:
>>Hello all,
>>We place this piece of code to test how coordinate transformation 
>>works with OGR.
>>         OGRSpatialReference oSourceSRS, oTargetSRS;
>>         OGRCoordinateTransformation *poCT;
>>         double  x1, y1;
>>         oSourceSRS="EPSG:4326";
>>         oTargetSRS="EPSG:4989";
>>         poCT = OGRCreateCoordinateTransformation( &oSourceSRS, 
>> &oTargetSRS );
>>         x1 = -45.859485925833;
>>         y1 = -23.2101365278;
>>         printf("%lf %lf \n",x1,y1);
>>
>>         if( poCT == NULL || !poCT->Transform( 1, &x1, &y1 ) )
>>             printf( "Transformation failed.\n" );
>>         else
>>             printf( "(-45.859485925833,-23.2101365278) -> (%f,%f)\n",
>>                      x1, y1 );
>>The program compiles fine, but it gives the following runtime error:
>>ERROR 6: Unable to load PROJ.4 library (proj.dll), creation of
>>OGRCoordinateTransformation failed.
>>Isn't PROj.4 (proj.lib) built in OGR?
>
>Reinaldo,
>
>In the default configuration PROJ.4 is loaded at runtime rather than
>being linked against at build time.  This was a slightly peculiar and
>unusual decision on my part many years ago.  Do you have PROJ.dll available
>in your PATH?  If not, you will need to add it for reprojection support.
>
>Best regards,
>--
>---------------------------------------+--------------------------------------
>I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam at pobox.com
>light and sound - activate the windows | http://pobox.com/~warmerdam
>and watch the world go round - Rush    | Geospatial Programmer for Rent
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