Ellipsoid: GRS 1980
Prime meridian: Greenwich
Data source: EPSG
Information source: L. Portokalakis; Public Petroleum Corporation of Greece
Revision date: 2011-07-20
Scope: Topographic mapping.
Remarks: Replaced (old) Greek datum. Oil industry work based on ED50.
Area of use: Greece - onshore.
Definition: OGC Well Known Text
DATUM["Greek_Geodetic_Reference_System_1987", SPHEROID["GRS 1980",6378137,298.257222101, AUTHORITY["EPSG","7019"]], AUTHORITY["EPSG","6121"]]
Definition: OGC Well Known Text 2 (2019)
DATUM["Greek Geodetic Reference System 1987", ELLIPSOID["GRS 1980",6378137,298.257222101, LENGTHUNIT["metre",1]], ID["EPSG",6121]]
Definition: ESRI Well Known Text
DATUM["D_GGRS_1987", SPHEROID["GRS_1980",6378137.0,298.257222101]]
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.5/projjson.schema.json", "type": "GeodeticReferenceFrame", "name": "Greek Geodetic Reference System 1987", "ellipsoid": { "name": "GRS 1980", "semi_major_axis": 6378137, "inverse_flattening": 298.257222101 }, "scope": "Topographic mapping.", "area": "Greece - onshore.", "bbox": { "south_latitude": 34.88, "west_longitude": 19.57, "north_latitude": 41.75, "east_longitude": 28.3 }, "id": { "authority": "EPSG", "code": 6121 } }