Unit: metre
Data source: EPSG
Information source: "Geodetic Reference System 1980" by H. Moritz; Bulletin Geodesique
Revision date: 2013-08-23
Remarks: Adopted by IUGG 1979 Canberra. Inverse flattening is derived from geocentric gravitational constant GM = 3986005e8 m*m*m/s/s; dynamic form factor J2 = 108263e-8 and Earth's angular velocity = 7292115e-11 rad/s.
Definition: OGC Well Known Text
SPHEROID["GRS 1980",6378137,298.257222101, AUTHORITY["EPSG","7019"]]
Definition: OGC Well Known Text 2 (2019)
ELLIPSOID["GRS 1980",6378137,298.257222101, LENGTHUNIT["metre",1], ID["EPSG",7019]]
Definition: ESRI Well Known Text
SPHEROID["GRS_1980",6378137.0,298.257222101]
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.5/projjson.schema.json", "type": "Ellipsoid", "name": "GRS 1980", "semi_major_axis": 6378137, "inverse_flattening": 298.257222101, "id": { "authority": "EPSG", "code": 7019 } }