EPSG
St. Helena Government, Environment and Natural Resources Directorate (ENRD).
2016-11-25
Engineering survey.
Defined by offset of -17.073m applied to St. Helena Tritan ellipsiodal height (CRS code 7880).
St Helena, Ascension and Tristan da Cunha - St Helena Island - onshore.
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "VerticalReferenceFrame", "name": "St. Helena Tritan Vertical Datum 2011", "scope": "Engineering survey.", "area": "St Helena, Ascension and Tristan da Cunha - St Helena Island - onshore.", "bbox": { "south_latitude": -16.08, "west_longitude": -5.85, "north_latitude": -15.85, "east_longitude": -5.59 }, "id": { "authority": "EPSG", "code": 1176 } }