Geodesy.
EPSG::1254 has been the then current realization of SIRGAS-Chile. No distinction is made between the original and subsequent realizations.
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "GeodeticReferenceFrame", "name": "SIRGAS-Chile", "ellipsoid": { "name": "GRS 1980", "semi_major_axis": 6378137, "inverse_flattening": 298.257222101 }, "scope": "Geodesy.", "area": "Chile - onshore and offshore. Includes Easter Island, Juan Fernandez Islands, San Felix, and Sala y Gomez.", "bbox": { "south_latitude": -59.87, "west_longitude": -113.21, "north_latitude": -17.5, "east_longitude": -65.72 }, "id": { "authority": "EPSG", "code": 1254 } }