Digital Ortho generation with grass

Hello,

I would like to do digital ortho generation using Grass.

Here is the data that I have:
   . imagery scans
   . ascii or USGS DEMs
   . aerotriangulation data
   . camera calibrated focal length and radial distortion table

Hi,
please have a look at the recently referenced
"Mailing list Archive" at

http://www.laum.uni-hannover.de/iln/grass/grass42/grass_faq.html

There was some discussion on that point.

Cheers

   Markus