EPSG
Ebong et al, AVN International, 1991.
2004-10-14
Geodesy, engineering survey, topographic mapping.
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "VerticalReferenceFrame", "name": "Lagos 1955", "scope": "Geodesy, engineering survey, topographic mapping.", "area": "Nigeria - onshore.", "bbox": { "south_latitude": 4.22, "west_longitude": 2.69, "north_latitude": 13.9, "east_longitude": 14.65 }, "id": { "authority": "EPSG", "code": 5194 } }