Summary Parameters of The Coordinate System
- Datum: OSGB36
- Map projection: Transverse Mercator
- True Origin: 49°N, 2°W
- False Origin: 400 km west, 100 km north of True Origin
- Scale Factor: 0.9996012717+
- EPSG Code: EPSG:27700
- Ellipsoid: Airy 1830
- Semi-major axis a: 6377563.396 m
- Semi-minor axis b: 6356256.909 m
- Flattening (derived constant): 1/299.3249646
Read more about this topic: Ordnance Survey National Grid
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