21 GCA § 60516: 1993 Guam Geodetic Datum and Map Grid.

(a) The 1993 Guam Geodetic Network shall adopt the North American Datum of 1983 (NAD83 Geodetic Datum) as the Coordinate Reference System.

(b) The Guam Map Grid, with the following parameters, shall be adopted for surveying application in Guam:

Central Meridian and

Longitude of Origin 144 45' East Longitude

Latitude of Origin 13 30' North Latitude

Easting of Origin 100,000 Meters

Northing of Origin 200,000 Meters

Central Scale Factor 1.000000