[GRASSLIST:5344] r.neighbors can solve my problem bu it doesn't work!!

[Carlos Henrique Grohmann de Carvalho]

Hello all.
 

 
So, I'm trying to make a drainage density map. To do this, I need to 
calculate the length of stream channels within a given area (500x500m) and 
then calculate the ratio beetwen this sum and the area of the cell. I have 
this idea of use r.neighbors to sum the values of streams in a raster map 
(all streams have value=1, other=0), since in its manual there is a method 
of SUM and some others (min,max, etc). The problem starts when I try to run 
r.neighbors and it tells me that SUM is not legal. With what command I can 
perform this operation?
 

 
Thanks thanks thanks.
 

 
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   Carlos Henrique Grohmann de Carvalho - Guano   
 
     Geologist - MSc Student IGc-USP - Brazil
 
   Linux User #89721  PGP key: www.keyserver.net
 
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