[Proj] The world of ECEF aka geocentric coordinates

Noel Zinn ndzinn at comcast.net
Sat Jan 31 11:24:25 EST 2009

See Section 2.2 of Guidance Note 7-2 ("Coordinate Conversions and
Transformations including Formulas") available at www.epsg.org.

-----Original Message-----
From: proj-bounces at lists.maptools.org
[mailto:proj-bounces at lists.maptools.org] On Behalf Of Gerald I. Evenden
Sent: Saturday, January 31, 2009 8:59 AM
To: PROJ.4 and general Projections Discussions
Subject: Re: [Proj] The world of ECEF aka geocentric coordinates

On Saturday 31 January 2009 9:35:02 am Karney, Charles wrote:
> > I personally find the Wiki stuff useless and misleading.  The proper
> On ECEF vs Geocentric: I welcome a return to original terminology
> instead of having a multitude of names for the same thing.  I have the
> Google version of Bomford (1952 edition).  Does he define "Geocentric
> Coordinate System"?  (I couldn't find it there.)  If not, is there
> another authoritative reference?

In the 3rd, 1971, edition see page 593 where geocentric is discussed.  The 
conversion of geocentric to geodetic is simply dismissed as an iterative 

The whole religious complexion of the modern world is due
to the absence from Jerusalem of a lunatic asylum.
-- Havelock Ellis (1859-1939) British psychologist
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