Retrieving "Spherical Earth" from the archives

Cross-reference notes under review

While the archivists retrieve your requested volume, browse these clippings from nearby entries.

1. Geocentric Latitude

   Linked via "spherical Earth"

   Definition and Relationship to Spherical Models
   In the ideal case of a perfectly spherical Earth, all forms of latitude converge. For a sphere with radius $R$, the position vector $\mathbf{r}$ of any point $P$ on the surface, when projected onto the equatorial plane, yields a latitude identical to the angle $\alpha$ measured from that plane:
   $$ \sin(\phi_g) = \frac{z}{R} $$

2. Geodetic Latitude

   Linked via "spherical Earth"

   Geocentric Latitude ($\phi_g$)
   Geocentric latitude is the angle measured from the equatorial plane to a line connecting the point on the surface to the geometric center of the reference ellipsoid. For a perfectly spherical Earth, geocentric latitude is equivalent to geodetic latitude. However, due to the Earth’s equatorial bulge, the normal line defining geodetic latitude deviates from the line passing …