[GRASSLIST:8895] orthorectification of Quickbird satellite images

[Dan Gavin]

Hello all:

I would like to orthorectify some high-resolution Quickbird images, 
taken 20 degrees off-nadir.  They are in a mountainous region, and I 
need fairly high positional accuracy.  While these images are 
distributed as geoTIFFs, elevational distortions have not been 
removed (their ortho product is based on a 90 meter DEM).  Searching 
the list archives, I see a suggestion to use i.points3 and 
i.rectify3.  Are these functions available in GRASS 6.1?  Any other 
suggestions, including other software?

Many thanks,

Dan

-- 
Dan Gavin
Research Associate
University of Vermont
Botany and Agricultural Biochemistry
120B Marsh Life Science
109 Carrigan Dr.
Burlington, VT 05405-0086