Re: Altitude in meters above WGS-84 Geoid ?

Earl Needham (
Mon, 02 Mar 1998 14:54:31 -0700

At 08:23 AM 3/2/98 -0800, Jim Varney wrote:
>Programs ask for altitude/elevation/height (I'll use all three so I won't
>restart a thread about the 'proper' use of those terms) above mean sea level
>is that the common number end users have access to.  You're also right that
>the difference between the sea level datum and the spheroid datum makes no
>practical difference: your 30 meter 'error' relative to a 6378 km earth
>radius is one part in 200,000.

	So, just to be absolutely sure, I enter 4295 in the height block, because
that's how high above seal level the ground is here, right?


Earl Needham, KD5XB
Clovis, NM
Commercial Pilot
Airplane, Single Engine Land
Instrument Airplane
Private Priveleges, Airplane Single Engine Sea