[GRASSLIST:2999] Re: rubbersheeting in GRASS5

[Otto Dassau]

Benjamin Ducke schrieb:
> 
> Hi there,
> 
> is there a way to rectify an arbitrary cell map in GRASS
> without having to go through the full-blown ortho-photo
> rectification process?
> I have a number of air-photos that I would like to fit
> over a topographic map. However, I have none of the required
> information on camera, flight data, etc, so I do not seem
> to be able to use the ortho-rectification modules.
> What I am looking for is a simple process that lets me
> select some source points on the air photo, than assign target
> points on the topo map to them. It should then rotate and "stretch"
> the photo so that the source points are most closely matched
> to the target points. I have no need for high precision results.
> Is there a way to do this in GRASS?
> Does anyone know about an open source software which can do
> this sort of rubbersheeting? If so, I would gladly adapt
> it into a GRASS 5.3 module!

you can use i,rectify instead of i.orto.photo

  Otto