North American Datum (NAD 83)

The horizontal control datum for the United States, Canada, Mexico, and Central America, based on a geocentric origin and the Geodetic Reference System 1980. This datum, designated as NAD 83, is a geodetic reference system. NAD 83 is based on the adjustment of 250,000 points including 600 satellite Doppler stations which constrain the system to a geocentric origin.

Authorization Path: 2.5.7.4.28.0