[GRASSLIST:7707] Re: area 3d

[ivan marchesini]

Thank you very much carlos...
I will check soon your paper!!!!

ivan





Il giorno lun, 25-07-2005 alle 13:47 +0000, Carlos Guâno Grohmann ha
scritto:
> Ivan, 
> 
> You can get the real (3D) area of each cell in your DTM using
> r.mapcalc and a slope map (take a look at Grohmann, 2004, Computers &
> Geosciences 30, i'll send you the pdf in a separate mail), and then
> sum the values.
> 
> Carlos
> 
> 
> 
> 
> On 7/25/05, ivan marchesini <marchesini at unipg.it> wrote:
> > dear users,
> > I'm trying to obtain the  3d surface of a dtm using r.surf.area...
> > the problem is that the area doesn't cover all the region and the
> > boundaries are really irregular...
> > in this conditions the module r.surf.area finds problems and I obtain a
> > 3d surface smaller than the flat surface.
> > I have tried to increase the resolution but I have only obtained a small
> > increse of the 3d area....
> > any suggestion for solving the problem????
> > thank you for your help...
> > ivan
> > 
> > 
> > 
> > 
> > 
> > --
> > Ivan Marchesini
> > Department of Civil and Environmental Engineering
> > University of Perugia
> > Via G. Duranti 93/a
> > 06125
> > Perugia (Italy)
> > e-mail: marchesini at unipg.it
> >         ivan.marchesini at gmail.com
> > tel: +39(0)755853760
> > fax: +39(0)755853756
> > 
> > 
> > 
> > 
> > 
> 
> 
-- 
Ivan Marchesini
Department of Civil and Environmental Engineering
University of Perugia
Via G. Duranti 93/a 
06125
Perugia (Italy)
e-mail: marchesini at unipg.it
        ivan.marchesini at gmail.com
tel: +39(0)755853760
fax: +39(0)755853756