Have you got a heightfield for the earth?
Its a map where white colors indicate highest
points and black colors indicate lowest points.

If not, mail me, and I'll send one to you. Its
2000x1000 with 256 gray-tones, jpeg, 306 kb,
but I'm not sure if it is suited for your purposes.

Care to give some more details of your
weather simulation? I'm very much interested in what
you're trying to go for, realism, or rather, a more fun
and explanatory style? And to which degree (actual
snowfall, or just "cold vs warm temperatures" - and
that "just" isn't meant to imply that its a simple task)...

Regards,
Tim


--
Tim Nikias
Homepage: http://www.digitaltwilight.de/no_lights/index.html
Email: Tim### [at] gmxde

> I am a high school computer teacher and am interested in using pov-ray with
> my students to model the planet earth.  I have been successful in creating a
> cut-away view of the earth and have created an animation showing the earth
> rotating into the night complete with the appearance of city lights. I am
> also working on a global weather simulation which has a long way to go.  My
> question is about the possibility of wrapping a height field of the earths
> surface topography onto a spherical shape.  I would like my students to be
> able to experiment with issues like the difference between global elevations
> as they really are compared to pictures and illustrations which exaggerate
> the vertical scale. Is there a way to do this?
>
>

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