Ellipsoid: Bessel 1841
Prime meridian: Greenwich
Data source: EPSG
Information source: Bundesamt für Landestopographie
Revision date: 2008-06-24
Scope: Topographic mapping.
Area of use: Liechtenstein; Switzerland.
Definition: OGC Well Known Text
DATUM["CH1903", SPHEROID["Bessel 1841",6377397.155,299.1528128, AUTHORITY["EPSG","7004"]], AUTHORITY["EPSG","6149"]]
Definition: OGC Well Known Text 2 (2019)
DATUM["CH1903", ELLIPSOID["Bessel 1841",6377397.155,299.1528128, LENGTHUNIT["metre",1]], ID["EPSG",6149]]
Definition: ESRI Well Known Text
DATUM["D_CH1903", SPHEROID["Bessel_1841",6377397.155,299.1528128]]
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.5/projjson.schema.json", "type": "GeodeticReferenceFrame", "name": "CH1903", "ellipsoid": { "name": "Bessel 1841", "semi_major_axis": 6377397.155, "inverse_flattening": 299.1528128 }, "scope": "Topographic mapping.", "area": "Liechtenstein; Switzerland.", "bbox": { "south_latitude": 45.82, "west_longitude": 5.96, "north_latitude": 47.81, "east_longitude": 10.49 }, "id": { "authority": "EPSG", "code": 6149 } }