Home > Mathematica, Mathematics > What’s in a name

What’s in a name

Once again I have found instruction from John D Cook’s blog: latitude.

As a somewhat calming exercise I illustrate the difference between the geocentric and geographic latitude in the following animate gif in which the ratio of the semi-major to semi-minor axis is 1.5 (eccentricity approximately 0.746).

In the top graphic the red line is the normal to the ellipse.  The bottom graphic plots the geocentric-geographic latitude against the geocentric (both in radians). The red point corresponds to the point of the arrow tip in the top graphic.

Geocentric and geographic latitude

This is a rather unpolished  post, even for me, but it provided some welcome distraction.

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Categories: Mathematica, Mathematics
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  1. October 4, 2011 at 6:39 pm

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