[GRASS-user] face to DEM?

[Jachym Cepicky]

Hi,

you can try v.surf.rst as well

j

Vincent Bain píše v Ne 15. 02. 2009 v 10:32 +0100:
> Hello Adam,
> hope I understood what you mean to do. If I had to cope with your
> problem, I would import the source file as points, then run v.to.rast,
> and r.surf.nnbathy with the "l" interpolation method.
> The risk for this solution is the triangulation performed by
> r.surf.nnbathy be different from your source TIN...
> 
> Good luck,
> Vincent.
> 
> Le samedi 14 février 2009 à 16:42 -0800, Adam Dershowitz a écrit :
> > I have some 3-d vector faces.  They were defined in a text file like  
> > this:
> > F 10
> > 1 2 1
> > 2 2 2
> > ...
> > ...
> > etc.
> > 
> > I imported them into grass like this:
> > v.in.ascii -zn input=faces.txt out=faces format=standard
> > and all seems fine.
> > 
> > I can see the faces, and if I click on points around the edges I can  
> > get a height as well.
> > I can't figure out how to generate a raster DEM from these faces.   
> > Essentially I would like to know the approximate elevation at each  
> > raster point inside the faces.
> > I tried v.to.rast but then I get "Column parameter missing"
> > For v.to.rast3 I get  "Unable to get layer info for vector map"
> > I also tried v.extrude but I see all 0s (ie Number of areas: 0 etc.)
> > 
> > Did I do something wrong on my import?  Did I miss some other way to  
> > do the conversion?
> > I want to be able to do some mapcalcs with the heights of an these  
> > faces compared to another raster map, but I can't figure out how to  
> > convert these faces to something that I can work with.
> > 
> > Thanks much,
> > 
> > --Adam
> > 
> > 
> > 
> > _______________________________________________
> > grass-user mailing list
> > grass-user at lists.osgeo.org
> > http://lists.osgeo.org/mailman/listinfo/grass-user
> > 
> 
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-- 
Jachym Cepicky
e-mail: jachym.cepicky gmail com
URL: http://les-ejk.cz
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