PD: [GRASS-user] How to combine rasters?

[Maciej Tomaszczyk]

hi
You can use r.mapcalc and if(isnull) function
best
mt


Maciej Tomaszczyk
Polish Geological Institute
Geological Mapping Department
http://www.pgi.gov.pl
http://www.opengeology.pl



-----Wiadomość oryginalna-----
Od: grass-user-bounces at lists.osgeo.org w imieniu leonidas300
Wysłano: N 2008-07-06 13:02
Do: grass-user at lists.osgeo.org
Temat: [GRASS-user] How to combine rasters?
 

I have 3 rasters:
1. Lakes with value 2.5
2. Rivers with value 1
3. Mountains above 1000m with value 3
I need to combine the 3 rasters so as Lakes' values dominate on Rivers' and
Mountains' values and Rivers' values dominates on Mountains' values. How can
I achieve that? Is r.patch suitable for that? Where can I find any tutorial
with raster combination like that? Thank you for any help, Leonidas Greece
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