Source: wikibot/geodetic-reference-system-1980
= Geodetic Reference System 1980
{wiki=Geodetic_Reference_System_1980}
The Geodetic Reference System 1980 (GRS80) is a geodetic reference system that defines the shape and size of the Earth and serves as the basis for creating the reference frame associated with the Global Positioning System (GPS) and other geospatial applications. It was established in 1980 as an update to earlier geodetic systems.