Thanks Moritz,
r.recode did exactly what I needed.
much appreciated
Wes
Moritz Lennert <mlennert@club.worldonline.be> 02/23/09 1:02 PM >>>
On 23/02/09 11:16, Wesley Roberts wrote:
Dear list.
I have a raster file with values coded in 8 bit grey scale 0-255. I
would like to invert the raster values so that 255 is now 0 and 0 is
now 255. I have not found an out of the box solution in grass but
have tried the r.reclass function.
How about r.recode with a rule such as:
old_low:old_high:new_low:new_high
0:255:255:0
?
I generated a reclass rule file
but am not sure about the form of the file.
You need a '=', so
0=255
1=254
etc
Moritz
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