Thank you very much Nikos,
your comments will be very useful for me.

Josep


On 01/15/2013 10:44 AM, Nikos Alexandris wrote:
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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--
Josep Sitjar
Técnico SIG
Tel. (34)972418039
www.sigte.udg.edu
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