Ordnance Survey National Transformation
Replaces ETRS89 to OSGB36 / British National Grid (1) (code 7913). Replaced by ETRS89 to OSGB36 / British National Grid (3) (code 7953). May be approximated to better than 0.03m using NTv2 method - see tfm code 5338.
Ordnance Survey of Great Britain, http://www.gps.gov.uk
2021-05-13
Geodesy.
See CRS code 4258 for recommended coordinate axis representation for the human interface.
Ellipsoidal 2D CS. Axes: latitude, longitude. Orientations: north, east. UoM: dec deg