[Proj] How to apply an affine transformation?

[Hamish]

Assumpcio Termens wrote:
> Generate a NTv2 grid was the first idea to apply, but I try
> to find if a direct application would be possible and avoid
> datum shift files. 

perhaps this could help:

"v.transform - Performs an affine transformation (shift, scale
and rotate, or GPCs) on vector map."

http://grass.osgeo.org/grass64/manuals/html64_user/v.transform.html


the help page indicates that similar transforms are available
in PostGIS and R-statistics.


Hamish