EPSG
Ordnance Survey of Northern Ireland.
2020-07-24
Topographic mapping (large scale).
Orthometric heights. Malin Head (datum code 5130) used for 1:50,000 and smaller mapping.
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "VerticalReferenceFrame", "name": "Belfast Lough", "scope": "Topographic mapping (large scale).", "area": "United Kingdom (UK) - Northern Ireland (Ulster) - onshore.", "bbox": { "south_latitude": 53.96, "west_longitude": -8.18, "north_latitude": 55.36, "east_longitude": -5.34 }, "id": { "authority": "EPSG", "code": 5131 } }