Hi Sylvain, thanks for all the information. I'll try that now.

Merci et a+

Fabien


"Sylvain" <rem### [at] lapostenet> wrote:
> "HENON fabien" <fab### [at] caramailcom> wrote:
> > "Sylvain" <rem### [at] lapostenet> wrote:
> > > Hi there
> > > this is a small test using a 30mx30m elevation grid on which I mapped the
> > > corresponding roadmap. This is the Mont Blanc area (the winding road in red
> > > above Chamonix is the one going to the tunnel entrance).
> > > Maybe I'll try to add some small clouds later on...
> > > Sylvain
> >
> > Hi, nice stuff.
> >
> > Some time ago, I tried to render DEM files with povray, but there are lots
> > of differents types of DEM files.
> > What type did you use, what converter, where did you find the DEM where the
> > maps?
> >
> > Cheers,
> >
> > Fabien
>
> I got the data from somewhere on the net (can't remember where though). A
> great resource for elevation data is the Nasa SRTM data (google for SRTM or
> go to : ftp://e0srp01u.ecs.nasa.gov/)
>
> Once you've obtained the file containing the elevations (a n x m matrix,
> each of the element being an altitude), edit it in a text editor. As the
> file is in binary format, you'll see tons of silly characters. Just add at
> the begining of the file the following lines :
> P5
> 1201 1201
> 65535
> and save the file with extension ".pgm". You'll then have a picture that you
> can use with POV. 1201 1201 is the size of the matrix, so adapt it to your
> data. 65535 is the max value.
> See also :
> http://www.imagico.de/pov/earth_scene.html
> and
>
http://news.povray.org/povray.general/thread/%3Ce5n9e0%24dn6%241%40chho.imagico.de%3E/
> where I asked about the same question and Christoph kindly gave his reply.
>
> I hope this has been helpful...
>
> S.

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