[Proj] Wikipedia ECEF entry

Eran Burstain burstain at gmail.com
Wed Feb 4 00:45:13 EST 2009

Well, the rotational axis is one, but the ECEF's are many (each datum
defines different translation - not to mention the rotations for molodensky
7-params), so, 'it' or 'they' does not coincident with the rotational axis
(and maybe not all of them are parallel to it...).

On Tue, Feb 3, 2009 at 10:32 PM, Jay Hollingsworth <
jhollingsworth at houston.oilfield.slb.com> wrote:

> As long as people are asking about the term ECEF, I would like to fix
> the definition of ECEF on the Wikipedia page
> http://en.wikipedia.org/wiki/ECEF
> but first I want to make sure I'm not wrong. Since every high-school
> student in the world relies on Wikipedia, it would be good for it to
> be close to right.
> The definition says "The z-axis is defined as being parallel to the
> earth rotational axes, pointing towards north". Isn't it actually
> coincident with the rotational axis, rather than being parallel?
> I just created a discussion page under the definition so the world at
> large could comment.
> Jay Hollingsworth
> Seabed Portfolio Manager and
> Principal Data Architect
> Schlumberger Information Solutions
> phone: 713 513 8854 fax: 713 513 2093
> _______________________________________________
> Proj mailing list
> Proj at lists.maptools.org
> http://lists.maptools.org/mailman/listinfo/proj
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