[GRASSLIST:9564] Re: rectifying images

[Hamish]

> >>I need to rectify several images in the next time. Is there a way to
> >>automatize this procedure a little bit? I have the "original" image
> >and >then about 10 to 20 images which needs to be corrected that they
> >refer >to the original one. I thought of something like saving the
> >correction >points of the original image to an file, so that I don't
> >need to mark >again (the reference points will be the same for all
> >images) and I only >need to specify them in the images which needs to
> >be rectified. 
> >
> >Add all the images to a group, then rectify the lot.
> >
> >i.group input=name[,name,...]
> >i.rectify -a
>
> I'm not sure if this helps for my problem (perhaps I was not clear 
> enough in my description). The problem is, that I have one original 
> images which I want to use as reference and all others are more or
> less deformed but no one at the same level. So I think I will have
> mark my reference points in all deformed images. When I understand
> right grouping is good, when you have many images whith the same
> deformation, or am I wrong?


ah, ok, I see.

You would use image groups when you have multiple maps with the same
exact georeferencing (e.g. RGB bands, multi-band LANDSAT, etc). That way
you set the points up once and then apply to all maps.


Hamish