Need for command line version of r.mask in GRASS4.0

Brian Culpepper brian at
Mon Nov 1 17:56:05 EST 1993

> I am needing a command line version of r.mask.
> Does such a beast exist.  Any help would be appreciated.
> Thanks
> Steffen Meyer
> Steffen Meyer, PE    Water Resource Engineer, Civil Engineering
> Graduate Student in Water Resources,  Colorado State University
> EMail: sm646601 at

	The big secret to r.mask is that it creates a new map from
an existing one called: MASK .  You can create a mask from any map
by simply using g.copy rast="yourmap",MASK . The mask created will
include all areas with a category value in "yourmap", so a reclass
may be needed to specify specific locations prior to copying "yourmap".

Hope this works for you,

R. Brian Culpepper                                 Research Assistant
Center for Advanced Spatial Technologies           (fax) 501 575-3846
Rm. 214 Ozark Hall                                (work) 501 575-6159
University of Arkansas                            brian at
Fayetteville, AR 72701
All opinions are my own and do not necessarily reflect those of the
Center for Advanced Spatial Technologies or the University of Arkansas.

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