[GRASS-user] Re: tin to raster dem: SOLVED

ivan marchesini marchesini at unipg.it
Sat Jun 17 14:30:23 EDT 2006


Dear all, dear Maciek,
many thanks to all for the answers..
the solution proposed by Maciek works really well...
it seems that the module v.surf.nnbathy modified changing in line 138
"-P alg=nn" with "-P alg=l" is able to create a plane passing for tree
rasterized points!!!!
many thanks!!!
Ivan



Il giorno sab, 17/06/2006 alle 13.00 +0200, Maciek Sieczka ha scritto:
> On Fri, 16 Jun 2006 10:50:23 +0200
> ivan marchesini <marchesini at unipg.it> wrote:
> 
> > Dear all...
> > I have been able to create a tin starting from the v.delaunay module
> > and then manual editing the v.delaunay output exported with v.in.ascii
> > (format=standard) 
> > now I can see, using nviz, the some filled triangles in the 3d
> > space...!!!!
> > now the problem:
> > I would like to transfrom the tin surface in a raster surface...
> > is it possible in some way!!!!
> > any idea????
> 
> 
> This *might* work:
> 
> Get the apices of your triangles into points vector, rasterize it
> (v.to.rast) and feed to my r.surf.nnbathy
> (http://grass.gdf-hannover.de/wiki/GRASS_AddOns).
> 
> You will only have to modify the script slightly. In line 138 put "-P
> alg=l" instead of "-P alg=nn". This will make nnbathy triangulate
> only, without any smoothing.
> 
> Let me know if it worked.
> 
> Maciek
> 
> P.S.
> 
> Please don't post to grasslist at baylor.edu. Post to 
> grassuser at grass.itc.it.
> 
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-- 
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
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