Description of CRS - HR_HDKS / HR_TM
AttributeEntry
CountryCroatia
Country identifierHR
CRS identifierHR_HDKS / HR_TM
CRS alias
HR1901, MGI1901
CRS valid areaCroatia
CRS scopeuse in filed of state surevey, cadastre and base mapping
CRS remarks
vertical datum are separate
Datum identifierHDKS
Datum alias
HDKS...Hrvatski drzavni koordinatni sustav (Croatian 
National Coordinate System), HR1901, MGI1901, Hermanskogel 
Datum typegeodetic
Datum anchor point
Austria, Hermannskogel, Habsburgwarte,
Lat = 48°16'15.2900" N,
Lon = 16°17'41.0600" E
Datum realization epoch1901
Datum valid area
Croatia
Datum scope
Datum remarks
HR1901 datum is inherited from Austro-Hungarian Monarchy; 
see: MGI (1901): Die Ergebnisse der Triangulierungen des K. 
und K. Militär-Geographischen Institutes in Wien, 1.Band 
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 identifierHR_TM
Coordinate system typeprojected
Coordinate system dimension2
Coordinate system remarks
Coordinate system axis nameX
Coordinate system axis directionNorth
Coordinate system axis unit identifiermetre
Coordinate system axis nameY
Coordinate system axis directionEast
Coordinate system axis unit identifiermetre
Operation identifierHR_TM
Operation valid areaCroatia
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 number7
Operation method remarks
Operation parameter namelatitude of origin
Operation parameter value
Operation parameter remarks0°, the Equator
Operation parameter namelongitude of origin
Operation parameter value
15° E, 18° E
Operation parameter remarkscentral meridians 15° E and 18° E for Croatia
Operation parameter namefalse northing
Operation parameter value
0 m
Operation parameter remarkswhole territory of Croatia has positive value
Operation parameter namefalse easting
Operation parameter value
500 000 m + (n * 10**6) m, with n...zone number e.g. 5 500 
000 for zone number 3 (CM = 15° E) 
Operation parameter remarks
Operation parameter namescale factor at central meridian
Operation parameter value
0.9999
Operation parameter remarks
Operation parameter namewidth of zones
Operation parameter value
Operation parameter remarks
Operation parameter namezone numbers n
Operation parameter value
5, 6
Operation parameter remarksn = longitude value of central meridian / 3