EPSG
General Directorate of Land, http://www.dgterritorio.pt/
2013-04-10
Geodesy, engineering survey, topographic mapping.
Orthometric heights.
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "VerticalReferenceFrame", "name": "Cais da Madalena", "scope": "Geodesy, engineering survey, topographic mapping.", "area": "Portugal - central Azores - Pico island onshore.", "bbox": { "south_latitude": 38.32, "west_longitude": -28.61, "north_latitude": 38.61, "east_longitude": -27.98 }, "id": { "authority": "EPSG", "code": 1105 } }