degree
EPSG
OGP
2016-12-15
The international reference meridian as defined first by the 1884 International Meridian Conference and later by the Bureau International de l'Heure (BIH) and then the International Earth Rotation Service (IERS).
Definition: OGC Well Known Text 2 (2019)
PRIMEM["Greenwich",0, ANGLEUNIT["degree",0.0174532925199433], ID["EPSG",8901]]
Definition: ESRI Well Known Text
PRIMEM["Greenwich",0.0]
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.5/projjson.schema.json", "type": "PrimeMeridian", "name": "Greenwich", "longitude": 0, "id": { "authority": "EPSG", "code": 8901 } }