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<P><FONT SIZE=2>hi<BR>
You can use r.mapcalc and if(isnull) function<BR>
best<BR>
mt<BR>
<BR>
<BR>
Maciej Tomaszczyk<BR>
Polish Geological Institute<BR>
Geological Mapping Department<BR>
<A HREF="http://www.pgi.gov.pl">http://www.pgi.gov.pl</A><BR>
<A HREF="http://www.opengeology.pl">http://www.opengeology.pl</A><BR>
<BR>
<BR>
<BR>
-----Wiadomość oryginalna-----<BR>
Od: grass-user-bounces@lists.osgeo.org w imieniu leonidas300<BR>
Wysłano: N 2008-07-06 13:02<BR>
Do: grass-user@lists.osgeo.org<BR>
Temat: [GRASS-user] How to combine rasters?<BR>
<BR>
<BR>
I have 3 rasters:<BR>
1. Lakes with value 2.5<BR>
2. Rivers with value 1<BR>
3. Mountains above 1000m with value 3<BR>
I need to combine the 3 rasters so as Lakes' values dominate on Rivers' and<BR>
Mountains' values and Rivers' values dominates on Mountains' values. How can<BR>
I achieve that? Is r.patch suitable for that? Where can I find any tutorial<BR>
with raster combination like that? Thank you for any help, Leonidas Greece<BR>
--<BR>
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