{"$schema":"https://proj.org/schemas/v0.7/projjson.schema.json","type":"CompoundCRS","name":"RBEPP12 Grid + ODN height","components":[{"type":"ProjectedCRS","name":"RBEPP12 Grid","base_crs":{"type":"GeographicCRS","name":"RBEPP12-IRF","datum":{"type":"GeodeticReferenceFrame","name":"RBEPP12 Intermediate Reference Frame","ellipsoid":{"name":"GRS 1980","semi_major_axis":6378137,"inverse_flattening":298.257222101}},"coordinate_system":{"subtype":"ellipsoidal","axis":[{"name":"Geodetic latitude","abbreviation":"Lat","direction":"north","unit":"degree"},{"name":"Geodetic longitude","abbreviation":"Lon","direction":"east","unit":"degree"}]},"id":{"authority":"EPSG","code":10277},"remarks":"Intermediate CRS created in 2022 to assist the emulation of the ETRS89 / RBEPP12 SnakeGrid projected CRS through transformation ETRS89-GBR [OSNet v2009] to RBEPP12-IRF (1) (code 10278) used in conjunction with the RBEPP12-LCC map projection (code 10279)."},"conversion":{"name":"RBEPP12-LCC","method":{"name":"Lambert Conic Conformal (2SP)","id":{"authority":"EPSG","code":9802}},"parameters":[{"name":"Latitude of false origin","value":50.85,"unit":"degree","id":{"authority":"EPSG","code":8821}},{"name":"Longitude of false origin","value":-3.25,"unit":"degree","id":{"authority":"EPSG","code":8822}},{"name":"Latitude of 1st standard parallel","value":50.3,"unit":"degree","id":{"authority":"EPSG","code":8823}},{"name":"Latitude of 2nd standard parallel","value":51.45,"unit":"degree","id":{"authority":"EPSG","code":8824}},{"name":"Easting at false origin","value":372382.8292,"unit":"metre","id":{"authority":"EPSG","code":8826}},{"name":"Northing at false origin","value":217764.7796,"unit":"metre","id":{"authority":"EPSG","code":8827}}]},"coordinate_system":{"subtype":"Cartesian","axis":[{"name":"Easting","abbreviation":"E","direction":"east","unit":"metre"},{"name":"Northing","abbreviation":"N","direction":"north","unit":"metre"}]}},{"type":"VerticalCRS","name":"ODN height","datum":{"type":"VerticalReferenceFrame","name":"Ordnance Datum Newlyn"},"coordinate_system":{"subtype":"vertical","axis":[{"name":"Gravity-related height","abbreviation":"H","direction":"up","unit":"metre"}]}}],"scope":"Engineering survey and topographic mapping for railway applications.","area":"United Kingdom (UK) - on or related to the rail route from Reading via Newbury to Penzance.","bbox":{"south_latitude":50.05,"west_longitude":-5.63,"north_latitude":51.71,"east_longitude":-0.85},"id":{"authority":"EPSG","code":10281}}