Can an object not exactly sphere mapped by a spherical coordinate system?
It is well know that an earth is very close to a sphere, but not exactly. Can a spherical coordinate system describe it accurately using only two angle coordinates? People with some knowledge about curved surface may answer immediately: Yes, Of course, because the earth surface is still a simple curved surface with exactly the same topology as a sphere and with unique correspondence between a physical point and a pair of coordinates (Longitude, Latitude). Click to go to the beginning of the FAQ.
