[Gdal-dev] GetProjectionRef() returns different strings in Win and Linux

Frank Warmerdam warmerdam at pobox.com
Wed Oct 1 09:44:20 EDT 2003


Ricardo Scachetti Pereira wrote:
>    Hello, all.
> 
>    I'm having a problem with method GDALDataset::GetProjectionRef() and 
> I hope somebody can help me out.
>    I'm trying to get the projection string from an ESRI grid and I'm 
> getting different results in Linux and Windows (it's a cross-platform 
> project).
>    In Linux I get the correct projection string while in Windows I get 
> an empty string ("", not NULL).
>    The prj.adf file is the following:
> 
> Projection    GEOGRAPHIC
> Datum         WGS84
> Spheroid      WGS84
> Units         DD
> Zunits        NO
> Parameters  
>    The projection string returned by GDALDataset::GetProjectionRef() in 
> Linux is:
> 
> GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS 
> 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],TOWGS84[0,0,0,0,0,0,0],AUTHORITY["EPSG","6326"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9108"]],AXIS["Lat",NORTH],AXIS["Long",EAST],AUTHORITY["EPSG","4326"]] 
> 
> 
>    In Windows, the very same call returns an empty string.
> 
>    I'm using gdal-1.1.9 in both platforms, MS Visual C++ 6 in Windows 
> and gcc 3.2.2 on a RedHat 9.1 Linux box.
>    Any ideas about what is going on?
>    Any help is greatly appreciated.
>    Regards,

Ricardo,

I don't know any obvious reason this would be failing only on windows.  The
mostly likely problem is that the code somehow didn't find the prj.adf file
for some reason, but I don't know why.

If you can provide me with the dataset in a zip file, I could try reproducing
it here.  Please send directly (not via the list).

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





More information about the Gdal-dev mailing list