{"$schema":"https://proj.org/schemas/v0.7/projjson.schema.json","type":"ProjectedCRS","name":"Timbalai 1948 / RSO Borneo (ch)","base_crs":{"type":"GeographicCRS","name":"Timbalai 1948","datum":{"type":"GeodeticReferenceFrame","name":"Timbalai 1948","ellipsoid":{"name":"Everest 1830 (1967 Definition)","semi_major_axis":6377298.556,"inverse_flattening":300.8017}},"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":4298},"remarks":"Adopts metric conversion of 39.370147 inches per metre. Replaced by GDM2000 (CRS code 4742) in East Malaysia and by GDBD2009 (CRS code 5247) in Brunei."},"conversion":{"name":"Rectified Skew Orthomorphic Borneo Grid (chain)","method":{"name":"Hotine Oblique Mercator (variant B)","id":{"authority":"EPSG","code":9815}},"parameters":[{"name":"Latitude of projection centre","value":4,"unit":"degree","id":{"authority":"EPSG","code":8811}},{"name":"Longitude of projection centre","value":115,"unit":"degree","id":{"authority":"EPSG","code":8812}},{"name":"Azimuth at projection centre","value":53.3158204722222,"unit":"degree","id":{"authority":"EPSG","code":8813}},{"name":"Angle from Rectified to Skew Grid","value":53.1301023611111,"unit":"degree","id":{"authority":"EPSG","code":8814}},{"name":"Scale factor at projection centre","value":0.99984,"unit":"unity","id":{"authority":"EPSG","code":8815}},{"name":"Easting at projection centre","value":29352.4763,"unit":{"type":"LinearUnit","name":"British chain (Sears 1922)","conversion_factor":20.1167651215526},"id":{"authority":"EPSG","code":8816}},{"name":"Northing at projection centre","value":22014.3572,"unit":{"type":"LinearUnit","name":"British chain (Sears 1922)","conversion_factor":20.1167651215526},"id":{"authority":"EPSG","code":8817}}]},"coordinate_system":{"subtype":"Cartesian","axis":[{"name":"Easting","abbreviation":"E","direction":"east","unit":{"type":"LinearUnit","name":"British chain (Sears 1922)","conversion_factor":20.1167651215526}},{"name":"Northing","abbreviation":"N","direction":"north","unit":{"type":"LinearUnit","name":"British chain (Sears 1922)","conversion_factor":20.1167651215526}}]},"scope":"Engineering survey, topographic mapping.","area":"Brunei - onshore and offshore; Malaysia - East Malaysia (Sabah; Sarawak) - onshore and offshore.","bbox":{"south_latitude":0.85,"west_longitude":109.31,"north_latitude":7.67,"east_longitude":119.61},"id":{"authority":"EPSG","code":29871}}