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[gpsd-dev] ✘wgs84_separation()

From: Gary E. Miller
Subject: [gpsd-dev] ✘wgs84_separation()
Date: Wed, 17 Jul 2019 15:17:15 -0700

Yo All!

I have been looking at the Altitude calculations in gpsd and
they have been sort of random.  I've tried to get all the altitudes
to be WGS84 altitudes.

Then a user needs a geoid separation to compute MSL.  gpsd
provides a function wgs84_separation() to get this value.

JamesB192 added tests for that caculation.  The new test cases are

Comparing those results to those from here:

It appears that wbs84_separation() can be up to 15 meters off!

Looks like we been a new geoid calculator.

Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
        address@hidden  Tel:+1 541 382 8588

            Veritas liberabit vos. -- Quid est veritas?
    "If you can’t measure it, you can’t improve it." - Lord Kelvin

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