Editing Geographic coordinate conversion (section)

====Properties====
The following condition holds for the longitude in the same way as in the geocentric coordinates system:
:<math>\frac{X}{\cos\lambda} - \frac{Y}{\sin\lambda} = 0.</math>

And the following holds for the latitude:
:<math>\frac{p}{\cos\phi} - \frac{Z}{\sin\phi} - e^2 N(\phi) = 0,</math>

where <math>p = \sqrt{X^2 + Y^2}</math>, as the parameter <math>h</math> is eliminated by subtracting
:<math>\frac{p}{\cos\phi} = N + h</math>

and
:<math>\frac{Z}{\sin\phi} = \frac{b^2}{a^2}N + h.</math>

The following holds furthermore, derived from dividing above equations:
:<math>\frac{Z}{p} \cot \phi = 1 - \frac{e^2 N}{N + h}.</math>