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 das Velas", "scope": "Geodesy, engineering survey, topographic mapping.", "area": "Portugal - central Azores - Sao Jorge island onshore.", "bbox": { "south_latitude": 38.48, "west_longitude": -28.37, "north_latitude": 38.8, "east_longitude": -27.71 }, "id": { "authority": "EPSG", "code": 1103 } }