[GRASS-user] cells with undefined aspect

[José Antonio Ruiz Arias]

Personally I prefer to use the NULL value (or -1, for example). Note that
aspect has no sense in a slope zero area so it is a good idea to use a
singular value for a exceptional situation. That's my view


> -----Mensaje original-----
> De: grassuser-bounces at grass.itc.it [mailto:grassuser-
> bounces at grass.itc.it] En nombre de Carlos "Guâno" Grohmann
> Enviado el: miércoles, 04 de julio de 2007 15:46
> Para: grass user
> Asunto: [POSIBLESPAM]: [GRASS-user] cells with undefined aspect
> 
> 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
> 
> --
> +-----------------------------------------------------------+
>               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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