[GRASS-user] cells with undefined aspect

[Carlos "Guâno" Grohmann]

Speaking of slope/aspect, what do you guys think is the best approach
with cell of undefined aspect (zero slope)?
In this all roughness study I am doing, there are some nice methods
working with vector orientation. So I use aspect - compass azimuth -
but what about those cells with zero slope? should I make them to have
what aspect? zero? 360? NULL?


cheers

-- 
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              Carlos Henrique Grohmann - Guano
  Visiting Researcher at Kingston University London - UK
  Geologist M.Sc  - Doctorate Student at IGc-USP - Brazil
Linux User #89721  - carlos dot grohmann at gmail dot com
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