Ellipsoid: Bessel 1841
Prime meridian: Greenwich
Data source: EPSG
Information source: Instituto Geografico e Cadastral Lisbon http://www.igeo.pt
Revision date: 2008-06-24
Scope: Topographic mapping.
Remarks: Replaced by Lisbon 1937 adjustment (which uses International 1924 ellipsoid).
Area of use: Portugal - mainland - onshore.
Definition: OGC Well Known Text
DATUM["Lisbon_1890", SPHEROID["Bessel 1841",6377397.155,299.1528128, AUTHORITY["EPSG","7004"]], AUTHORITY["EPSG","6666"]]
Definition: OGC Well Known Text 2 (2019)
DATUM["Lisbon 1890", ELLIPSOID["Bessel 1841",6377397.155,299.1528128, LENGTHUNIT["metre",1]], ID["EPSG",6666]]
Definition: ESRI Well Known Text
DATUM["D_Lisbon_1890", SPHEROID["Bessel_1841",6377397.155,299.1528128]]
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.5/projjson.schema.json", "type": "GeodeticReferenceFrame", "name": "Lisbon 1890", "ellipsoid": { "name": "Bessel 1841", "semi_major_axis": 6377397.155, "inverse_flattening": 299.1528128 }, "scope": "Topographic mapping.", "area": "Portugal - mainland - onshore.", "bbox": { "south_latitude": 36.95, "west_longitude": -9.56, "north_latitude": 42.16, "east_longitude": -6.19 }, "id": { "authority": "EPSG", "code": 6666 } }