Weighted Buffers?

[Bruce K. Wylie (303) 490 8336]

The way I would approach this is have a buffer layer where 1 = 100' from
steams and 2 = 200' from steams. Then I would use r.mapcalc and its 
logical if, then statements to access slope coverage and buffer coverage to
develope the third coverage, the "weighted buffer".

Regards,

Bruce Wylie

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> Subject: Weighted Buffers?
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> 
> I have a friend with a question who is not on the network yet, but
> here is the question:
> I need to know if GRASS can do weighted buffers, and if so what
> command(s) you use to do it.  Example:  a buffer around streams
> where if slope is greater than 40% and the ground cover is trees, the
> buffer should be 200', but if the slope is less than 40% slope and
> the ground cover is grass, the buffer should be 100'.  Clear as mud?
> Thanks for any input!!
> 
> 
>