Making mosaics for arial photos with grass

[Vasilis Yannakopoulos]

Well, it is not a very easy thing to do, but anything can be done in
GRASS if you give it a try. You will have to import the photos
(r.in.tiff), make the geometric corrections (i.point, i.vpoint,
i.rectify, i.rectify2), cut the part of the raster file  that you need
(r.mapcalc) and finally patch them all together (r.patch). Make sure
that the photos are scanned in 8bit and issue the command "d.colormode
float" before starting the corrections. The user's manual will help you
with that, and maybe you can check Nikolay Bankov's Master's thesis (for
Maich). I think you can make your mosaic, but I prefer ERDAS Imagine
much more :)
Good luck

Gis Lab wrote:
> 
> Dear users
> Does any one knows how to make mosaic for aerial photos with grass.
> Something like 'orthophoto' command with ERDAS!
> I have 5 aerial photos in tiff and jpg formats.
> Thanks in advance

-- 
Vasilis Yannakopoulos
Lab of Forest Management & Remote Sensing
Department of Forestry & Natural Environment
Aristotle University
Aristotle University Campus Box 248
voice: +3031992689
fax: +3031998897
e-mail: vilouni at for.auth.gr