Mwhei wrote:
Hello dear sir,.
I have a question to consult you.I want to know is there a command
to implement that the cells values of one raster layer to
minus the cells values of another raster layer ? Would you please give
me some suggestions? Any help will be ok. Thank you very much!
Sincerely yours,
Yang
You can do this with r.mapcalc. Please check
http://grass.itc.it/grass62/manuals/html62_user/r.mapcalc.html
r.mapcalc "newmap=oldmap1 - oldmap2"
Markus
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