Description of Transformation - LV_KRON / NH to EVRF2007| Attribute | Entry |
|---|
| Operation identifier | LV_KRON / NH to EVRF2007 |
| Operation identifier alias |
|
| Country | Latvia |
| Country identifier | LV |
| Operation valid area | Latvia |
| Operation scope | |
| Source coordinate reference system identifier | LV_KRON / NH |
| Target coordinate reference system identifier | EVRF2007_AMST / NH |
| Operation version | March 2010 |
| 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 = 56°58' N
Lon = 24°53' E |
| Operation parameter name | vertical translation |
| Operation parameter value | +0.154 m |
| Operation parameter remarks | |
| Operation parameter name | slope in the direction of the meridian (positive when up
northwards) |
| Operation parameter value | +0.016" |
| Operation parameter remarks | Equivalent to +0.008 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 | -0.012" |
| Operation parameter remarks | Equivalent to -0.006 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. |