Geodesy.
Note that Egypt 1930 uses the International 1924 ellipsoid, unlike the Egypt 1907 datum (code 6229) which uses the Helmert ellipsoid. Oil industry references to the Egypt 1930 datum name and the Helmert ellipsoid probably mean Egypt 1907 datum.
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "GeodeticReferenceFrame", "name": "Egypt 1930", "ellipsoid": { "name": "International 1924", "semi_major_axis": 6378388, "inverse_flattening": 297 }, "scope": "Geodesy.", "area": "Egypt - onshore.", "bbox": { "south_latitude": 21.97, "west_longitude": 24.7, "north_latitude": 31.68, "east_longitude": 36.95 }, "id": { "authority": "EPSG", "code": 6199 } }