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": "Santa Cruz da Graciosa", "scope": "Geodesy, engineering survey, topographic mapping.", "area": "Portugal - central Azores - Graciosa island onshore.", "bbox": { "south_latitude": 38.97, "west_longitude": -28.13, "north_latitude": 39.14, "east_longitude": -27.88 }, "id": { "authority": "EPSG", "code": 1106 } }