Description of CRS - CZ_S-JTSK / KROVAK| Attribute | Entry |
|---|
| Country | Czech Republic |
| Country identifier | CZ |
| CRS identifier | CZ_S-JTSK / KROVAK |
| CRS alias |
|
| CRS valid area | Czech Republic / Slovak Republic |
| CRS scope | Coordinates of Uniform Trigonometrical Cadastral Network |
| CRS remarks | Coordinates of the points of the S-JTSK are derived on the
basis of 42 identical points assumed from the Austrian
military triangulation in Bohemia by creating basic network
of 1st order using angular measurement, by transforming the
measured sets of directions to the plane of general conic
conform projection, by the adjustment in this plane and
compressing up to the 5th order. |
| Datum identifier | S-JTSK |
| Datum alias | System jednotne trigonometricke site katastralni (System
of Uniform Trigonometrical Cadastral Network) |
| Datum type | geodetic |
| Datum anchor point | Austria, Hermannskogel, Habsburgwarte,
Lat = 48°16'15.2900" N,
Lon = 16°17'41.0600" E |
| Datum realization epoch | 1920-1957 |
| Datum valid area | Czech Republic / Slovak Republic |
| Datum scope |
|
| Datum remarks |
|
| Prime meridian identifier | Greenwich |
| Prime meridian greenwich longitude | 0° |
| Prime meridian remarks | |
| Ellipsoid identifier | Bessel 1841 |
| Ellipsoid alias | Bessel |
| Ellipsoid semi major axis | 6 377 397.155 m |
| Ellipsoid shape | true |
| Ellipsoid inverse flattening | 299.15281285 |
| Ellipsoid remarks | |
| Coordinate system identifier | KROVAK |
| Coordinate system type | projected |
| Coordinate system dimension | 2 |
| Coordinate system remarks | |
| Coordinate system axis name | X / southing |
| Coordinate system axis direction | South |
| Coordinate system axis unit identifier | metre |
| Coordinate system axis name | Y / westing |
| Coordinate system axis direction | West |
| Coordinate system axis unit identifier | metre |
| Operation identifier | KROVAK |
| Operation valid area | Czech Republic / Slovak Republic |
| Operation scope | the reference area is represented by the cone extended to
the plane |
| Operation method name | Oblique Conformal Conic Projection |
| Operation method name alias | Krovak's Projection |
| Operation method formula | Kostelecky, Jan; Research Institute of Geodesy, Topography
and Cartography, CZ-25066 Zidby 98: Description of a
procedure of transformation between geodetical coordinates
and planar (cartographic) coordinates in KROVAK projection
- or -
Projection equations for the calculation of coordinates X,
Y and meridian convergence C from given geographic
coordinates B and L, In: Danis, M.; Valko, J.: Matematicka
kartografia. Edicne stredisko STU. Bratislava 1998, p.
134- 149. |
| Operation method parameters number | 18 |
| Operation method remarks | Coordinate system is rectangular. Its beginning is located
at the vertex of the cone. The axis X is the image of
longitude 42°30' eastwards of Ferro (24°50' E wrt
Greenwich) with the positive branch oriented to the south.
The axis Y is perpendicular to it and its positive branch
is oriented to the west. The vertex of the cone is at the
meridian 42°30' eastwards of Ferro (24°50' E wrt
Greenwich) and northwards of the parallel Lat=48°15' N by
1298039.0046 m and its axis goes through the centre of the
Earth. |
| Operation parameter name | prime geographic latitude on Bessel ellipsoid |
| Operation parameter value | 49°30' N |
| Operation parameter remarks | for this latitude were derived invariables for conform
projection of Bessel ellipsoid to Gauss sphere |
| Operation parameter name | prime geographic latitude on the Gauss sphere |
| Operation parameter value | 49°27´35.846255" N |
| Operation parameter remarks | value prime geographic latitude on the Gauss sphere
corresponds to prime geographic latitude on Bessel
ellipsoid |
| Operation parameter name | prime meridian on Bessel ellipsoid / longitude of
intersection of central cartographic parallel and
fundamental meridian on the Bessel ellipsoid |
| Operation parameter value | 42°30' E wrt Ferro |
| Operation parameter remarks | on this meridian is located the beginning of the
coordinate system JTSK |
| Operation parameter name | prime meridian on the Gauss sphere / longitude of
cartographic pole on the Gaussian sphere |
| Operation parameter value | 42°31´31.41725" E wrt Ferro |
| Operation parameter remarks | prime meridian on the Gauss sphere corresponds to prime
meridian on Bessel ellipsoid |
| Operation parameter name | scale factor of central cartographic parallel |
| Operation parameter value | 0.9999 |
| Operation parameter remarks | |
| Operation parameter name | false southing |
| Operation parameter value | 0 m |
| Operation parameter remarks | |
| Operation parameter name | false westing |
| Operation parameter value | 0 m |
| Operation parameter remarks | |
| Operation parameter name | multiple invariable |
| Operation parameter value | 1.000597498372 |
| Operation parameter remarks | it serves for the calculation of spherical geographic
coordinates on the Gauss sphere |
| Operation parameter name | integration invariable |
| Operation parameter value | 1.0034191640 |
| Operation parameter remarks | it serves for the calculation of spherical geographic
coordinates on the Gauss sphere |
| Operation parameter name | radius of the Gauss sphere |
| Operation parameter value | 6380703.61054 m |
| Operation parameter remarks | Bessel ellipsoid is projected on Gauss sphere |
| Operation parameter name | radius of reduced Gauss sphere |
| Operation parameter value | 0.9999 * radius of the Gauss sphere |
| Operation parameter remarks | the reduced Gauss sphere is conformly projected on the
conic area |
| Operation parameter name | spherical geographic latitude / latidude of cartographic
pole on the Gaussian sphere |
| Operation parameter value | 59°42'42.69689" N |
| Operation parameter remarks | |
| Operation parameter name | spherical geographic longitude of cartographic pole |
| Operation parameter value | spherical geographic longitude of cartographic pole is
identical with prime meridian on the Gauss sphere |
| Operation parameter remarks | |
| Operation parameter name | polar distance of the cartographic pole on the Gauss sphere |
| Operation parameter value | complement from spherical geographic latitude to 90° N |
| Operation parameter remarks | |
| Operation parameter name | prime cartographic parallel / latitude of central
cartographic parallel on the Gaussian sphere |
| Operation parameter value | 78°30' N |
| Operation parameter remarks | in this parallel the cone flanks the reduced the the Gauss
sphere |
| Operation parameter name | radius of the image of prime cartographic parallel |
| Operation parameter value | 1298039.00463 m |
| Operation parameter remarks | |
| Operation parameter name | latitude of intersection of central cartographic parallel
and fundamental meridian on the Bessel ellipsoid |
| Operation parameter value | 48°15' N |
| Operation parameter remarks | |
| Operation parameter name | width of zone between cartographic parallels |
| Operation parameter value | 3°30' |
| Operation parameter remarks | |