Ellipsoid: International 1924
Prime meridian: Greenwich
Data source: EPSG
Information source: Instituto Geografico e Cadastral Lisbon http://www.igeo.pt
Revision date: 2003-08-14
Scope: Topographic mapping.
Area of use: Portugal - Selvagens islands (Madeira province) - onshore.
Definition: OGC Well Known Text
DATUM["Selvagem_Grande", SPHEROID["International 1924",6378388,297, AUTHORITY["EPSG","7022"]], AUTHORITY["EPSG","6616"]]
Definition: OGC Well Known Text 2 (2019)
DATUM["Selvagem Grande", ELLIPSOID["International 1924",6378388,297, LENGTHUNIT["metre",1]], ID["EPSG",6616]]
Definition: ESRI Well Known Text
DATUM["D_Selvagem_Grande_1938", SPHEROID["International_1924",6378388.0,297.0]]
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.5/projjson.schema.json", "type": "GeodeticReferenceFrame", "name": "Selvagem Grande", "ellipsoid": { "name": "International 1924", "semi_major_axis": 6378388, "inverse_flattening": 297 }, "scope": "Topographic mapping.", "area": "Portugal - Selvagens islands (Madeira province) - onshore.", "bbox": { "south_latitude": 29.98, "west_longitude": -16.11, "north_latitude": 30.21, "east_longitude": -15.79 }, "id": { "authority": "EPSG", "code": 6616 } }