Meridian Description Name struct Tinman.Georef.Meridian Used by Datum.meridian Represents the prime meridian of a georeference. Fields / Optional id Type Georef.Id Default null The unique registry ID of well-known objects. name Type string Default null The human-readable name of this object. longitude Type number Default 0 The longitude (usually relative to Greenwich). unit Type Unit Default null The unit of measure. Id Proj