<div dir="ltr">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...).<br>
<br><div class="gmail_quote">On Tue, Feb 3, 2009 at 10:32 PM, Jay Hollingsworth <span dir="ltr"><<a href="mailto:jhollingsworth@houston.oilfield.slb.com">jhollingsworth@houston.oilfield.slb.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">As long as people are asking about the term ECEF, I would like to fix<br>
the definition of ECEF on the Wikipedia page<br>
<br>
<a href="http://en.wikipedia.org/wiki/ECEF" target="_blank">http://en.wikipedia.org/wiki/ECEF</a><br>
<br>
but first I want to make sure I'm not wrong. Since every high-school<br>
student in the world relies on Wikipedia, it would be good for it to<br>
be close to right.<br>
<br>
The definition says "The z-axis is defined as being parallel to the<br>
earth rotational axes, pointing towards north". Isn't it actually<br>
coincident with the rotational axis, rather than being parallel?<br>
<br>
I just created a discussion page under the definition so the world at<br>
large could comment.<br>
<br>
<br>
<br>
Jay Hollingsworth<br>
<br>
Seabed Portfolio Manager and<br>
Principal Data Architect<br>
Schlumberger Information Solutions<br>
phone: 713 513 8854 fax: 713 513 2093<br>
<br>
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</blockquote></div><br></div>