Hi All,
I would like to use an elevation mask to reclass certain areas in a
raster, while leaving the values outside the mask alone. Below are my
attempts so far. Unfortunately, when I export output raster, the
reclass appears to have been applied to entire raster. Is there a way
to do this using a MASK, or using r.mapcalc to create a new map3 that
modifies specific areas in map2 based on values in map1?
Hope this makes sense,
Roger
--
Attempt 1
--------------
731 r.mapcalc "MASK=if(europe_dem < 100)"
738 r.info europe_hillshade
739 r.rescale europe_hillshade from=0,254 to=180,180
out=europe_hillshade_clean
Figured it out. Used the following r.mapcalc expression:
r.mapcalc "new_hillshade=if(europe_dem < 100, 180, europe_hillshade)"
I think I might be in love!
--
On Sat, Oct 17, 2009 at 10:27 AM, Roger André <randre@gmail.com> wrote:
Hi All,
I would like to use an elevation mask to reclass certain areas in a
raster, while leaving the values outside the mask alone. Below are my
attempts so far. Unfortunately, when I export output raster, the
reclass appears to have been applied to entire raster. Is there a way
to do this using a MASK, or using r.mapcalc to create a new map3 that
modifies specific areas in map2 based on values in map1?
Hope this makes sense,
Roger
--
Attempt 1
--------------
731 r.mapcalc "MASK=if(europe_dem < 100)"
738 r.info europe_hillshade
739 r.rescale europe_hillshade from=0,254 to=180,180
out=europe_hillshade_clean