{"$schema":"https://proj.org/schemas/v0.7/projjson.schema.json","type":"GeographicCRS","name":"RRAF 1991","datum":{"type":"GeodeticReferenceFrame","name":"Reseau de Reference des Antilles Francaises 1991","ellipsoid":{"name":"WGS 84","semi_major_axis":6378137,"inverse_flattening":298.257223563}},"coordinate_system":{"subtype":"ellipsoidal","axis":[{"name":"Geodetic latitude","abbreviation":"Lat","direction":"north","unit":"degree"},{"name":"Geodetic longitude","abbreviation":"Lon","direction":"east","unit":"degree"},{"name":"Ellipsoidal height","abbreviation":"h","direction":"up","unit":"metre"}]},"scope":"Geodesy.","area":"French Antilles onshore and offshore - Guadeloupe (including Grande Terre, Basse Terre, Marie Galante, Les Saintes, Iles de la Petite Terre, La Desirade); Martinique; St Barthélemy; St Martin.","bbox":{"south_latitude":14.08,"west_longitude":-63.66,"north_latitude":18.54,"east_longitude":-57.52},"id":{"authority":"EPSG","code":4973},"remarks":"Replaces older local 2D systems Fort Marigot and Sainte Anne CRS (codes 4621-22) in Guadeloupe and Fort Desaix (CRS code 4625) in Martinique."}