Question

Difference between geodetic and geocentric coordinate system

Answer 1

Both geocentric and geodetic coordinates are expressed as a triple of latitude, longitude and altitude. In both cases, altitude is the height of the respective point above the surface of the Ellipsoid and longitude is the angle between the planes parallel to the earth axis and passing through the Greenwich Meridian respectively the point designated by the coordinates.

The difference between geocentric and geodetic coordinates lies in the definition of latitude:

In geocentric coordinates latitude is the angle between the equatorial plane and the line crossing through the earth's center and the point designated by the coordinates.
In geodetic coordinates latitude is the angle between the equatorial plane and the normal at the designated point, i.e. the vector standing perpendicular on the Ellipsoid at the designated point.

Answer 2

Answer:

As explained below

Explanation:

• The geocentric latitude of a point is the angles that it makes with the equatorial plane. Thus it's not a plane coordinate system and is based on the map projection, it is a system in which the earth is modeled in a spheroid in an XYZ point system that is measured from the center of the earth.

• The geodetic datum is a reference system of coordinate that is set on the referred points that are set on the system.  Used in geodesy and navigation and survey to translate the map info to the real-time position on the globe.

• Certain examples of datums include NAD27 for north America, ED 50 for Europe and the WGS 84 datum for world geodetic system. The location is based on longitude, latitude, and height.