r.los and r.drain

Ronald Thomas ront at niwot.CFNR.ColoState.EDU
Tue Apr 20 21:29:57 EDT 1993

You need to include the "input=" or "i=" , etc., along with your commands;
GRASS does not recognize what you are inputting without them.  Most
of the time, you can abbreviate using the first letter ("input=" becomes
"i=", "output=" becomes "o=", etc)

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