[GRASS-user] Automatic Orthorectification

[Markus Neteler]

On Thu, Mar 26, 2009 at 7:57 AM, Jachym Cepicky
<jachym.cepicky at gmail.com> wrote:
...
> however, if the position of GCPs is unknown to you, I'm affraid, you
> have to do it by hand

Maybe you can hack i.points.auto to
http://grass.osgeo.org/wiki/Image_processing#Geocoding

"seed" it with a priori knowledge or you start with very rough resolution
and then increase it in a cycle to get more precise chips. This would
require source code modification of course to take out the interactive
part (which is obsolete for GRASS 7 anyway and needs to be rewritten).

Markus