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. Does anyone have a clue on how to do that?
Thanks.
Pablo Torres Carreira
São Paulo - Brazil.
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On Fri, Oct 30, 2009 at 12:45 PM, Pablo Carreira
<pablotcarreira@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