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: [EMAIL PROTECTED] [mailto:grassuser- > [EMAIL PROTECTED] 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 > +-----------------------------------------------------------+ > _________________ > "Good morning, doctors. I have taken the liberty of removing Windows > 95 from my hard drive." > --The winning entry in a "What were HAL's first words" contest judged > by 2001: A SPACE ODYSSEY creator Arthur C. Clarke > > _______________________________________________ > grassuser mailing list > [email protected] > http://grass.itc.it/mailman/listinfo/grassuser _______________________________________________ grassuser mailing list [email protected] http://grass.itc.it/mailman/listinfo/grassuser
