The r.patch man page describes the program as "...using known category
values from one (or more) map layer(s) to fill in areas of 'no data' in
another map layer."
However, I have learned that it also replaces data on one layer with data
from another layer, not just the null-valued cells. I had searched for
another module to do this, then decided to try r.patch. It works.
Therefore, I suggest that the man page be adjusted to reflect this broader
capability.
Rich
Dr. Richard B. Shepard, President
Applied Ecosystem Services, Inc. (TM)
2404 SW 22nd Street | Troutdale, OR 97060-1247 | U.S.A.
+ 1 503-667-4517 (voice) | + 1 503-667-8863 (fax) | rshepard@appl-ecosys.com
Making environmentally-responsible mining happen.