[GRASS5] r.mapcalc and NULL question

[Markus Neteler]

Hi there,

maybe a r.mapcalc/NULL FAQ, but I don't get it...

Assume you have a streams map (streams contain values,
other cells=NULL). 

Now I want to add some values *everywhere* using r.mapcalc, but 
it is only added in those cells not containing a NULL value.

Any ideas how to overcome this problem?

Thanks in advance

 Markus

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