maven apache wrote:
> > r.mapcalc "NewMap=if(OldMap==999,null(),OldMap)"
> >
>
> :(
> I have seen the docs,but I am not sure the usage of it.
>
> My raster map is aa in the grass, and the to be changed value is 12.1,I want
> to change it to null,so can you build the commond for me ,:(
r.mapcalc 'aa2 = if(abs(aa - 12.1) < 1e-6, null(), aa)'
Or, to modify the map in-place:
r.null map=aa setnull=12.099999-12.100001
--
Glynn Clements <[email protected]>
_______________________________________________
grass-user mailing list
[email protected]
http://lists.osgeo.org/mailman/listinfo/grass-user
