🌍 GEODETIC REFERENCE
Surveying in United Kingdom
British National Grid (EPSG:27700) is the de-facto standard. OSTN15/OSGM15 transformation links ETRS89 GNSS observations to OSGB36 grid coordinates.
National datum
OSGB36 / ETRS89
Vertical datum
ODN (Ordnance Datum Newlyn)
UTM zones
30N, 31N (rarely used; BNG preferred)
CORS stations (our DB)
8
Mapping authority
Ordnance Survey (OS)