[GRASS-user] [GRASSLIST:1109] Re: tin to raster dem

[Laurent C.]

2006/6/16, ivan marchesini <marchesini at unipg.it>:
>
> Hi Laurent, thanks for your answer....
> I know that v.surf.* is able to interpolate points and contours...
> but don't have this kind of data and I don't mind to interpolate points
> because I would like to obtain perfect planes in correspondace of the
> triangles!!! interpolating will obviously create some little difference
> between the elevation of the dem and of the original triangle surface...
> the boundaries that I have are 3d boundaries, they start from an
> elevation and finish to another...
> if you can imagine a 3d triangle you can also imagine a raster dem the
> cells of which has the same elevation of the plane in each point!!!
>
> I have tried to interpolate the tree points of a 3d triangle...
> using v.surf.rst and smoothing=0 and tension=1  (for creating a perfect
> plane) but the results is not so fine (please see the small attached
> file, I apologize for this image with the users of the mailing list)
>
> I know I can use r.plane for creating a single plane but I should know
> the azimut and deep of the plane... is there a way to obtain this
> information for a 3d triangle??? (not in a manual way obviously)
>
> any idea????
> thanks
>
> Ivan
>
>
>
>
>
>
>
> Il giorno ven, 16/06/2006 alle 10.55 +0200, Laurent C. ha scritto:
> > Hi,
> > You can try v.surf.*
> >
> > 2006/6/16, ivan marchesini <marchesini at unipg.it>:
> >         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????
>

I see. What sort of result give v.to.rast ?
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