[x3d-public] v4 > Geospatial > WebMercator

[GPU Group]

my experience implementing web3d.org v4 geospatial webmercator transform in
freewrl
- easy, took an hour to program - just added another function beside UTM -
in other words, its a mapping plane transform to/from (ellipsoidal)
geographic coords

Results:
http://dug9.users.sourceforge.net/web3d/tests/geo/screenshot_webmercator.jpg
http://dug9.users.sourceforge.net/web3d/tests/geo/web_mercator.x3d

Method:
- only tests one coordinate back and forth for Menlo Park, CA.
- tests via script and (freewrl specific) geoConvert node which I have
recommended in the past to web3d via spec comment.
https://sourceforge.net/p/freewrl/git/ci/develop/tree/freex3d/src/lib/scenegraph/Component_Geospatial.c

L.1786 - 1870
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