[GRASS-user] r.slope.aspect with adjacent raster maps

[Thomas Zumbrunn]

Hi

I have several adjacent elevation raster maps from which I would like to 
generate slope maps with r.slope.aspect. I was wondering whether there is a 
simple way to determine the slope for the cells adjacent to the edges of the 
elevation map. I tried to combine the maps with r.patch prior to slope 
analysis. However, I ran into problems because of too big file sizes.

Does anybody have a solution to this problem, which does not only apply to 
slope calculations but to any neighborhood calculations at edge cells?

Regards
Thomas Zumbrunn