| Attribute | Entry |
|---|---|
| Operation identifier | CZ_KRON / NH to EVRF2019zero |
| Operation identifier alias | |
| Country | Czech Republic |
| Country identifier | CZ |
| Operation valid area | Czech Republic |
| Operation scope | approximate value for comparison with transformation to
EVRF2007; please find precise values at http://geoportal.cuzk.cz/Default.aspx?lng=EN&mode=TextMeta&text=sit.trans.uvod&side=sit.trans |
| Source coordinate reference system identifier | CZ_KRON / NH |
| Target coordinate reference system identifier | EVRF2019_AMST / NH |
| Operation version | December 2020 |
| Operation method name | 3 parameter height transformation |
| Operation method name alias | |
| Operation method formula |
H(II)=H(I)+a1+a2·Mo·(LAT-LATo)+a3·No·(LON-LONo)·cos(LAT)
H(I): height in the source system [m]
H(II): height in the target system [m]
Mo: radius of curvature in the meridian of GRS80 [m] in Po
No: radius of curvature perpendicular to the meridian of
GRS80 [m] in Po
LAT: latitude in ETRS89 [radian]
LON: longitude in ETRS89 [radian]
Po(LATo,LONo): Reference point of the transformation
a1...vertical translation [m]
a2...slope in the direction of the meridian [radian]
a3...slope in the direction perpendicular to the meridian
[radian] |
| Operation method parameters number | 3 |
| Operation method remarks | coordinates of the reference point Po:
Lat = 49°55' N
Lon = 15°15' E |
| Operation parameter name | vertical translation |
| Operation parameter value | +0.142 m |
| Operation parameter remarks | |
| Operation parameter name | slope in the direction of the meridian (positive when up northwards) |
| Operation parameter value | +0.026" |
| Operation parameter remarks | Equivalent to +0.013 m height change at a distance of 100 km of Po. To be in agreement with formulas the slope parameter has to be converted to Radians. |
| Operation parameter name | slope in the direction perpendicular to the meridian (positive when up eastwards) |
| Operation parameter value | +0.006" |
| Operation parameter remarks | Equivalent to +0.003 m height change at a distance of 100 km of Po. To be in agreement with formulas the slope parameter has to be converted to Radians. |