[GRASSLIST:2934] Importing intersectioning Raster-Files

[Harald Wehr]

Hi GrassList,

I 've got several tiff-files, each with a corresponding tfw-file. 
Unfortunately the files intersect a little bit with each other, as each 
tiff-file has got an empty margin surrounding the map. Consider 
following picture:

Map 1:                              I---------->6<
                                     I >4<--->3< I
                                     I  I     I  I
                                     I  I     I  I
                                     I >1<--->2< I
                                    >5<----------I

Map 2:                              I---------->6<
                                     I >4<--->3< I
                                     I  I     I  I
                                     I  I     I  I
                                     I >1<--->2< I
                                    >5<----------I

Each tiff-file contains everything from 5 to 6 while the actual 
information is within 1,2,3,4. In this example the points 1,2 from map 1 
would correspond to 4,3 from map 2.

Is it possible to produce one raster that contains all maps only with 
the relevant information from each tiff between the inner rectangle?

Thanks in advance
Harald