{"$schema":"https://proj.org/schemas/v0.7/projjson.schema.json","type":"CompoundCRS","name":"EWR2 Grid + ODN height","components":[{"type":"ProjectedCRS","name":"EWR2 Grid","base_crs":{"type":"GeographicCRS","name":"EWR2-IRF","datum":{"type":"GeodeticReferenceFrame","name":"EWR2 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":9763},"remarks":"Intermediate CRS created in 2021 to assist the emulation of the ETRS89 / EWR2 SnakeGrid projected CRS through transformation ETRS89 to EWR2-IRF (1) (code 9764) used in conjunction with the EWR2-TM map projection (code 9765). In 2024 the EWR2 Grid (ETRS89 / EWR2 SnakeGrid) was extended eastwards as the EWR3 Grid (ETRS89 / EWR3 SnakeGrid). To the west of Bedford the EWR2 Grid is an exact subset of the EWR3 Grid; over this extent the EWR3 Grid replaces the EWR2 Grid."},"conversion":{"name":"EWR3-TM","method":{"name":"Transverse Mercator","id":{"authority":"EPSG","code":9807}},"parameters":[{"name":"Latitude of natural origin","value":51.95,"unit":"degree","id":{"authority":"EPSG","code":8801}},{"name":"Longitude of natural origin","value":-0.9,"unit":"degree","id":{"authority":"EPSG","code":8802}},{"name":"Scale factor at natural origin","value":1,"unit":"unity","id":{"authority":"EPSG","code":8805}},{"name":"False easting","value":192519.9715,"unit":"metre","id":{"authority":"EPSG","code":8806}},{"name":"False northing","value":146942.6806,"unit":"metre","id":{"authority":"EPSG","code":8807}}]},"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 East West Rail (Phase 2) routes from Oxford to Bicester, Bletchley and Bedford, and from Claydon Junction to Aylesbury and Princes Risborough.","bbox":{"south_latitude":51.7,"west_longitude":-1.43,"north_latitude":52.24,"east_longitude":-0.36},"id":{"authority":"EPSG","code":9767}}