grad
EPSG
Institut Geographique National (IGN); Paris
2022-02-03
Conventional value of 0h 9m 20.935s = 2°20'14.025" adopted by IGN (Paris) in 1936 converted to grads. Preferred by EPSG to earlier value of 2°20'13.95" (2.596898 grads) used by RGS London (prime meridian code 8914).
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "PrimeMeridian", "name": "Paris", "longitude": { "value": 2.5969213, "unit": { "type": "AngularUnit", "name": "grad", "conversion_factor": 0.0157079632679489 } }, "id": { "authority": "EPSG", "code": 8903 } }