[GRASSLIST:10352] How to clip/cut a large image into a set of smaler images

[Lars Forseth]

hi!

I'm trying to find out how to clip a large geotiff landsat image into several 
smaller images; but I'm not finding any commands that seems to fit the bill! 
Possibly because I don't know quite where or what to look for!

Theres two things I would like to do:

1. Clip the image into several smaller "tiles"; either by defining rectangle 
size or by creating a vector grid that is used to "cut" the larger image into 
smaller ones.

2. Clip the image according to a municipality; i.e I have the area of the 
municipality as both a raster (binary); and a vector. The resulting image 
should be a geotiff or raster datasett that follows the borders of the 
municipality.

Sorry if this is a FAQ. I have looked at the GRASS GIS book 
(Mitasova/Neteler), GDAL docs and various searches by Google (all return too 
much information).

Regards

Lars F

Archaeologist
NTFK