Description of CRS - CH_CH1903+ / CH_PROJECTION+
AttributeEntry
CountrySwitzerland
Country identifierCH
CRS identifierCH_CH1903+ / CH_PROJECTION+
CRS alias
LV95
CRS valid areaSwitzerland / Liechtenstein
CRS scope
CRS remarks
equivalent to CH1903 except for local distortions of the 
CH1903 network 
Datum identifierCH1903+
Datum alias
Datum typegeodetic
Datum anchor point
Switzerland, Zimmerwald, Observatory
Datum realization epoch1995
Datum valid area
Switzerland / Liechtenstein
Datum scope
new GPS-based network of Switzerland, used in land surveying
Datum remarks
equivalent to CH1903, only the definitions have been 
transferred from Bern to Zimmerwald 
Prime meridian identifierGreenwich
Prime meridian greenwich longitude
Prime meridian remarks
Ellipsoid identifierBessel 1841
Ellipsoid aliasBessel
Ellipsoid semi major axis6 377 397.155 m
Ellipsoid shapetrue
Ellipsoid inverse flattening299.15281285
Ellipsoid remarks
Coordinate system identifierCH_PROJECTION+
Coordinate system typeprojected
Coordinate system dimension2
Coordinate system remarks
Coordinate system axis nameN
Coordinate system axis directionNorth
Coordinate system axis unit identifiermetre
Coordinate system axis nameE
Coordinate system axis directionEast
Coordinate system axis unit identifiermetre
Operation identifierCH_PROJECTION+
Operation valid areaSwitzerland / Liechtenstein
Operation scope
Operation method nameOblique Conformal Cylindric Projection
Operation method name alias
Oblique Mercator Projection
Operation method formula
M. Rosenmund (1903): Die Änderung des Projektionssystems 
der schweizerischen Landesvermessung, Verlag der Abteilung 
für Landestopographie, Haller'sche Buchdruckerei, Bern 
1903. 
Operation method parameters number5
Operation method remarks
origin at old observatory Bern
Operation parameter namelatitude of origin
Operation parameter value
46°57'08.66" N
Operation parameter remarks
Operation parameter namelongitude of origin
Operation parameter value
7°26'22.50" E
Operation parameter remarks
Operation parameter namefalse northing
Operation parameter value
1 200 000 m
Operation parameter remarks
Operation parameter namefalse easting
Operation parameter value
2 600 000 m
Operation parameter remarks
Operation parameter namescale factor at central meridian
Operation parameter value
1.0000
Operation parameter remarks