Description of CRS - AT_MGI / AT_TM
AttributeEntry
CountryAustria
Country identifierAT
CRS identifierAT_MGI / AT_TM
CRS alias
AT_MGI / AT_TM extended 3 zones of Gauß-Krüger 
projection, named Austria M28 (EPSG: 31281), Austria M31 
(EPSG: 31282) and Austria M34 (EPSG: 31283). 
CRS valid areaAustria
CRS scope
CRS remarks
AT_MGI / AT_TM describes the CRS that is used in the 
Austrian Cadastre since 1969. This CRS is used for the 
management of the Austrian cadastre while the parameters of 
AT_MGI / Austria GK are used as default values for the 
digital data distribution 
Datum identifierMGI
Datum alias
Militärgeographisches Institut
Datum typegeodetic
Datum anchor point
Austria, Hermannskogel, Habsburgwarte,
Lat = 48°16'15.2900" N,
Lon = 16°17'41.0600" E (wrt. Greenwich)
Datum realization epoch
Datum valid area
Austria
Datum scope
Datum remarks
Prime meridian identifierFerro
Prime meridian greenwich longitude17°40' W
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 identifierAT_TM
Coordinate system typeprojected
Coordinate system dimension2
Coordinate system remarks
Coordinate system axis nameX / northing
Coordinate system axis directionNorth
Coordinate system axis unit identifiermetre
Coordinate system axis nameY / easting
Coordinate system axis directionEast
Coordinate system axis unit identifiermetre
Operation identifierAT_TM
Operation valid areaAustria
Operation scope
Operation method nameTransverse Mercator Projection
Operation method name alias
Gauß Krüger Projection
Operation method formula
Transverse Mercator Mapping Equations, in Hooijberg, 
Practical Geodesy, 1997, pages 81-84 
Operation method parameters number6
Operation method remarks
Transverse Mercator Projection, 3 grad width, individual 
central meridians wrt. Ferro 
Operation parameter namelatitude of origin
Operation parameter value
Operation parameter remarks
0°, the Equator
Operation parameter namelongitude of origin
Operation parameter value
central meridians 28° E, 31° E, 34° E wrt. Ferro
Operation parameter remarks
central meridian (CM) of each zone
Operation parameter namefalse northing
Operation parameter value
0 m
Operation parameter remarks
Operation parameter namefalse easting
Operation parameter value
0 m
Operation parameter remarks
zone number are explicit
Operation parameter namescale factor at central meridian
Operation parameter value
1.0000
Operation parameter remarks
Operation parameter namewidth of zone
Operation parameter value
Operation parameter remarks