Re: [Algorithms] UTM mapping

[Jeff L. <je...@di...>]

Wayne,

The UTM is a standard map projection.  If you want to map a UTM texture to a sphere for example, calculate UV coordinates based on the mapping function.

http://mathworld.wolfram.com/MercatorProjection.html

Has the math behind variations of Mercator projection including UTM.

I happen to have just finished an article on mapping coordinates last month so the info was handy.  I didn't use transverse Mercator though.
The cool thing about using Mercator projections is there is a bunch of free source images from Nasa.  The earth with no clouds is a great one http://svs.gsfc.nasa.gov/imagewall/hologlobe/earth_noclouds.html.  There are also images of many other planets.

-Jeff

At 10:54 AM 8/17/2000 +0100, you wrote:
>Does anyone know where I can get some information on reading Universal
>Transverse Mercator (UTM) data for 3D/2D display. I'm starting off with the
>Binary Terrain (BT) format that I picked up from www.vterrain.org.
>Unfortunately I can't find any info on what the data actually is (it doesn't
>appear to be a simple heightmap). Any info would be appreciated :)
>
>Wayney
>
>
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