Josep:

> Hi,

Hi Josep!

> I'm working with an SPOT scene, which is preprocessed at the level 1A.
> Now I need to do a geometric correction of this scene, not only with
> control points but also with a Digital Terrain Model. It's possible to
> do this in GRASS? How?

Of course it is possible. Please, get your grip on the respective GRASS-wiki 
page and the related manuals.

Pointers:

<http://grasswiki.osgeo.org/wiki/Georeferencing>

and

<http://grass.osgeo.org/grass64/manuals/gm_georect.html>
<http://grass.osgeo.org/grass64/manuals/wxGUI.GCP_Manager.html>

and, of course <http://grass.osgeo.org/grass64/manuals/i.ortho.photo.html>

Best, Nikos

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