What ellipsoid or geoid for GPX file elevations-and how do you know?

Posted by Dan Menes on Stack Overflow See other posts from Stack Overflow or by Dan Menes
Published on 2010-06-08T20:28:00Z Indexed on 2010/06/08 20:32 UTC
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I have been poking around and have been unable to find a standard for what ellipsoid or geoid corresponds to "0" elevation in GPX files. Is there a standard? Do I just assume the WGS84 ellipsoid? Or if different standards are used, is there a way of figuring out from the file which one was used? Or making an educated guess?

And what is the source for your answer? I would love to have an authoritative reference.

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