[x3d-public] v4 > Geospatial > WebMercator

John Carlson yottzumm at gmail.com
Mon Apr 27 05:16:23 PDT 2020


What do people think about using an elevation grid instead of a sphere to
achieve a deformed animation?

On Sun, Apr 26, 2020 at 2:46 PM GPU Group <gpugroup at gmail.com> wrote:

> 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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