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The conversion of heights of the benchmarks of the detailed vertical reference network into the PL-EVRF2007-NH frame

Łukasz Borowski
Łukasz Borowski
 and 
Piotr Banasik
Piotr Banasik
   | Jan 17, 2020
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Article Category: Original Article
Published Online: Jan 17, 2020
Page range: 1 - 7
Received: Sep 26, 2019
Accepted: Dec 23, 2019
DOI: https://doi.org/10.2478/rgg-2020-0001
Keywords
© 2020 Łukasz Borowski et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1

Distribution of height differences between mean-tide and zero-tide systems in Poland [cm] (own study based on Mäkinen (2008))
Distribution of height differences between mean-tide and zero-tide systems in Poland [cm] (own study based on Mäkinen (2008))

Figure 2

Height differences ΔH between the Kronstad’60 and PL-EVRF2007-NH frames of the points of the basic reference network of Kętrzyn district along the N–S profile
Height differences ΔH between the Kronstad’60 and PL-EVRF2007-NH frames of the points of the basic reference network of Kętrzyn district along the N–S profile

Figure 3

The scheme of distribution of the points of basic reference network used for the construction of the model of height conversion from Kronstadt’60 to PL-EVRF2007-NH in the area of Kętrzyn district (height difference iso-lines are given in m)
The scheme of distribution of the points of basic reference network used for the construction of the model of height conversion from Kronstadt’60 to PL-EVRF2007-NH in the area of Kętrzyn district (height difference iso-lines are given in m)

The assessment of the accuracy of the model ΔHKronstadt′60–KRON86: raw data (the points of the reference network) and after adjustments (the Danish method)

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

The recommendations of the GUGiK concerning the conversion of heights depending on the state of data in districts (Somla, 2018)

Case The state of the reference network Recommended method of height calculation Gross cost [PLN/point]a
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

Characteristics of selected elevation frames in Poland

The name of elevation frame Measurement campaign Average error after adjustment [mm/km] Characteristics of the frame
Kronstadt’60 (Wyrzykowski, 1993) 1947–1958 0.78

normal heights;

gravimetric system Poczdam;

Kronstadt level;

mean-tide.
Kronstadt’86 (Kowalczyk and Rapinski, 2012; Łyszkowicz, 2012) 1974–1982 0.84

normal heights;

gravimetric system IGSN71;

Kronstadt level;

tide-free.
Kronstadt’2006a (Gajderowicz, 2007; Kowalczyk and Rapinski, 2012) 1999–2002b 0.88

normal heights;

gravimetric system IGSN71;

Kronstadt level;

tide-free.
PL-KRON86-NH (Somla, 2018) 1974–19821999–2002 0.91

normal heights;

gravimetric system IGSN71;

Kronstadt level;

tide-free.
PL-EVRF2007-NH (Mäkinen, 2008; Somla, 2018) 1999–2012 0.91

normal heights;

gravimetric system GRS’80;

Amsterdam level;

zero-tide.
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