Re: OT Re: Constructed maps

In a message dated 1/11/2008 2:07:46 PM Central Standard Time,
rfmilly@MSN.COM writes:


> Well, hurrah, I've acquired an old terrestrial globe (16in. diam., no
> stand,
> but holes at N and S poles where one used to be)!! suitable for playing
> with. I assume I'll either (1) have to paint over the whole thing, somehow
> retaining the handy lat. and long. lines, then draw in the Cindu land
> forms-- very challenging I suspect, or (2) make paper gores (with pre-drawn
> land forms) to glue on, equally challenging I suspect. The Zompist website
> has instructions for doing that, which I've tried, but getting the curvature
> right is a mystery. I might try tracing outlines from the existing ones???
>
> Does anyone know the geometrical qualities of a sphere? Are there formulae
> for drawing those triangular shapes with curved sides? They are all
> presumably arcs, but it would require a HUGE compass....or are they just
> regular isosceles triangles (I doubt)??  Is there perchance some free or
> inexpensive software that would help? I can do a lot of trial and error, of
> course..... Maybe I should get in touch with the geography dept. at one of
> the local colleges?
>
> Has anyone ever tried such a project? Any suggestions or hints would be very
> welcome (reply privately I think).
>
> Thanks, Roger
>
You could make a flat icosahedral (20 equilateral triangles) map, then
connect the edges to make a rough globe.

stevo   </HTML>

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