[GRASS-user] Some issues with r.mapcalc

[Fulvio Mastrogiovanni]

Hi everyone,

I hope you can help me in solving this issue. Basically, what I want to do is to
create a new raster map whose cells are simply given by the "or" of other two
maps (possibly for specific categories), as follows:

r.mapcalc test=if(vegcover==1 || railroads==1)

However, maps like railroads are null() when not equal to 1. The resulting map
"test" is null() wherever cells in railroads are null(), therefore making
null() also cells where vegcover is 1.

How can I solve this issue?

Thanks!

Fulvio


-- 
Fulvio Mastrogiovanni
DIST|University of Genova|Italy

Email: fulvio.mastrogiovanni at unige.it
WWW: http://www.laboratorium.dist.unige.it/~fulvio/
Phone: (+39)0103532801

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