[GRASS-user] Topographic Correction of Satellite images

[Markus Neteler]

On Fri, Oct 30, 2009 at 12:45 PM, Pablo Carreira
<pablotcarreira at hotmail.com> wrote:
>
>  I'm seaching for a way to do orthoretification of GeoEye1 high resolution
> images on grass based o SRTM DEM, the add-on i.topo.corr does not exist
> anymore.

It does :)
http://trac.osgeo.org/grass/browser/grass-addons/imagery/i.topo.corr

> Does anyone have a clue on how to do that?

But i.topo.corr is a radiation correction, not a terrain correction in the sense
of orthorectification. A rudimentary implementation was available in GRASS 4.x
in the image3 library but that was not completely developed.

We are looking for a developer (master student thesis?) to implement such
an algorithm. Meanwhile you could check OSSIM which has some sensor models:
http://download.osgeo.org/ossim/docs/pdfs/OSSIMOrthos.pdf

Markus