[GRASS-user] check pixel by pixel

[Jarosław Jasiewicz]

Andruit at gmx.de napisał(a):
> Hi, 
> I have several raster maps (aspect, slope, tand_curv etc.). I would like to combine these raster maps to one raster but without losing any information. As a result i would like to have one raster map with several attributes (aspect, slope, tang_curv etc.). And then I would like to check Pixel by Pixel 
>
> if slope = steep and aspect = North etc.
> then
> "Value of the checked pixel" + 10
>
> else
>
> ....
>
> Has anybody done this before? Is it possible to combine several raster maps without losing any information?
>
> Greets
>
> Andreas
>   
Thaw what you described has SpatialGridDataFrame in R. Simply you can 
import all raster data to one SGDataFrame and you can do there what you 
need.... It seems, becouse I can't understand for what you need 1 file 
instead of three or for and use mapcalc for that operation. Simply seems 
that mapalgebra (r.mapcalc) it is what you realy need

Jarek