[GRASS-user] [GRASSLIST:1064] Re: Landsat rectify

[Otto Dassau]

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 at 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 at 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.