Parameter | Raw data | The Danish method |
---|---|---|
Average [cm] | –8.2 | –8.2 |
Deviation [cm] | 0.9 | 0.6 |
Maximum [cm] | –6.4 | –6.9 |
Minimum [cm] | –10.5 | –9.6 |
Curtosis | –0.11 | –0.04 |
Skewness | –0.24 | –0.01 |
Case | The state of the reference network | Recommended method of height calculation | Gross cost [PLN/point] |
---|---|---|---|
1 |
has been modernised; the height in the PL-KRON86-NH frame; digitalised elevations. |
Adjustment in PL-EVRF2007-NH frame | 10 |
2 |
not modernised; heights in the Kronstadt’86 frame; there are data on elevations in levelling lines. |
Performing control measurements, data verification and adjustment in the PL-EVRF2007-NH frame | 50 |
3 |
not modernised; heights in different frames; incomplete archival material. |
Modernisation of the reference network and adjustment in the PL-EVRF2007-NH frame | 700 |
The name of elevation frame | Measurement campaign | Average error after adjustment [mm/km] | Characteristics of the frame |
---|---|---|---|
Kronstadt’60 ( |
1947–1958 | 0.78 |
normal heights; gravimetric system Poczdam; Kronstadt level; mean-tide. |
Kronstadt’86 ( |
1974–1982 | 0.84 |
normal heights; gravimetric system IGSN71; Kronstadt level; tide-free. |
Kronstadt’2006 |
1999–2002 |
0.88 |
normal heights; gravimetric system IGSN71; Kronstadt level; tide-free. |
PL-KRON86-NH ( |
1974–1982 |
0.91 |
normal heights; gravimetric system IGSN71; Kronstadt level; tide-free. |
PL-EVRF2007-NH ( |
1999–2012 | 0.91 |
normal heights; gravimetric system GRS’80; Amsterdam level; zero-tide. |