[gdal-dev] GDAL / PROJ.4 Transformation (cs2cs) - several results by PROJ.4-Versions (DHDN/GK2 => ETRS89/UTM32)

[Jean-Claude Repetto]

Gregor Fikoczek wrote :
> So is there a difference between PROJ.4-Versions (Version > 4.5 needs
> +datum-Parameter?) or am i doing something wrong?
> 

Hello,

In the prog 4.6.0 release notes, one can read :

  o MAJOR: Rework pj_transform() to avoid applying ellipsoid to ellipsoid
    transformations as a datum shift when no datum info is available.

So yes, a datum definition is mandatory if you want to perform a 
transformation.
The definition of epsg::25832 in the epsg file is incorrect.

Regards,
Jean-Claude