Hi all,
I would very grateful if someone could tell me how to rectify a Landsat image in GRASS 6.0.2RC4 using a DEM as height sources (i.points3 & i.rectify3 have been removed from this version of GRASS.
thanks in advance.
Ramiro Alvite
_________________________________________________________________
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Am Mittwoch, 10. Mai 2006 16:16 schrieb Ramiro Alvite Díaz:
Hi all,
I would very grateful if someone could tell me how to rectify a Landsat
image in GRASS 6.0.2RC4 using a DEM as height sources (i.points3 &
i.rectify3 have been removed from this version of GRASS.
Hi,
you need the module i.ortho.photo for this job...
regards,
Otto
thanks in advance.
Ramiro Alvite
Otto Dassau wrote:
Am Mittwoch, 10. Mai 2006 16:16 schrieb Ramiro Alvite Díaz:
Hi all,
I would very grateful if someone could tell me how to rectify a Landsat
image in GRASS 6.0.2RC4 using a DEM as height sources (i.points3 &
i.rectify3 have been removed from this version of GRASS.
Hi,you need the module i.ortho.photo for this job...
Unfortunately i.ortho.photo does NOT the job.
In fact the i.points3 & i.rectify3 (along with image3 library) are
highly desired for
GRASS 6 (they need to be ported), but it is most likely that the
satellite ortho
rectification was never complete.
IMHO i.ortho.photo cannot be used because it works on aerial images with
central
projection. Satellite data (line scanners as LANDSAT) are a special case as
you have central projection only line-wise.
For details, see GRASS 5, file src/libes/image3/ltm_ortho.c and others
there.
Markus
Am Donnerstag, 11. Mai 2006 09:52 schrieb Markus Neteler:
Otto Dassau wrote:
>Am Mittwoch, 10. Mai 2006 16:16 schrieb Ramiro Alvite Díaz:
>>Hi all,
>>
>>I would very grateful if someone could tell me how to rectify a Landsat
>>image in GRASS 6.0.2RC4 using a DEM as height sources (i.points3 &
>>i.rectify3 have been removed from this version of GRASS.
>
>Hi,
>
>you need the module i.ortho.photo for this job...Unfortunately i.ortho.photo does NOT the job.
In fact the i.points3 & i.rectify3 (along with image3 library) are
highly desired for
GRASS 6 (they need to be ported), but it is most likely that the
satellite ortho
rectification was never complete.IMHO i.ortho.photo cannot be used because it works on aerial images with
central
projection. Satellite data (line scanners as LANDSAT) are a special case as
you have central projection only line-wise.
For details, see GRASS 5, file src/libes/image3/ltm_ortho.c and others
there.
ok - sorry for this wrong information, but maybe 'ossim' can do it then? There
was a posting on the ossim mailing list ossim-developer@lists.sourceforge.net
by Garrett Potts today (not in the archive yet):
regards,
Otto
PS: whole archive:
http://sourceforge.net/mailarchive/forum.php?forum=ossim-developer
##########
Hello Ben:
orthoigen is used to create projected map products from the command
line. There is also igen that takes a keywordlist. The user docs
are located at:
http://ossim.telascience.org/ossimdata/
Precision terrain correction is done by default when elevation is
present. So any sensor model uses the elevation for precision
terrain correction if already present. The user docs I think have
elevation setup as well. If not let me know. We support DTED
directory structure, SRTM, and general raster (CVS). Note general
raster is only supported with the current CVS code.
Frederic Claudel has been adding in registration into the pipeline.
The registration docs are also located in that same directory.
Frederic uses the OGC spec to save tiepoints. These tiepoints are
ingested to create a new geometry object for ossim. He/we have had
good results with Landsat, Spot and a couple of other models.
Take care
Garrett
On May 10, 2006, at 6:37 PM, Ben.Rogers@ga.gov.au wrote:
Hi list,
I am looking for some help; a howto or the like to get me through
ortho-rectification of a landsat scene using OSSIM (command line
only – no gui). Basically what I want to do is apply terrain
correction and some warping based on image correlated tie points
(we already do this in house) to landsat scenes to output a ortho-
rectified product. Documentation on how to do stuff like this
seems very scarce on the ground and the user’s manual lack detail
in this respect. I would be happy to help write up some
documentation on this once I have it all worked out.