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

Borowski, Łukasz; Banasik, Piotr

doi:10.2478/rgg-2020-0001

Cited by 9 publications

(3 citation statements)

References 9 publications

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“…In this contribution, kriging/least squares collocation and a simple distance-based interpolation method, i.e., inverse distance weighting have been used. Also, a polynomial trend surface fitting approach was adopted since it is the most obvious and the most common way of approximating spatially varying phenomena (Borowski and Banasik, 2020;Tusat and Mikailsoy, 2018). It was used in combination with the methods mentioned above and played a role of a long wavelength component in height anomalies.…”

Section: General Methodology Of Local Quasi-geoid Models Constructionmentioning

confidence: 99%

A crossvalidation-based comparison of kriging and IDW in local GNSS/levelling quasigeoid modelling

Ligas

Lucki

Banasik

2022

Reports on Geodesy and Geoinformatics

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This study compares two interpolation methods in the problem of a local GNSS/levelling (quasi) geoid modelling. It uses raw data, no global geopotential model is involved. The methods differ as to the complexity of modelling procedure and theoretical background, they are ordinary kriging/least-squares collocation with constant trend and inverse distance weighting (IDW). The comparison itself was done through leave-one-out and random (Monte Carlo) cross-validation. Ordinary kriging and IDW performance was tested with a local (using limited number of data) and global (using all available data) neighbourhoods using various planar covariance function models in case of kriging and various exponents (power parameter) in case of IDW. For the study area both methods assure an overall accuracy level, measured by mean absolute error, root mean square error and median absolute error, of less than 1 cm. Although the method of IDW is much simpler, a suitably selected parameters (also trend removal) may contribute to differences between methods that are virtually negligible (fraction of a millimetre).

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Section: General Methodology Of Local Quasi-geoid Models Constructionmentioning

confidence: 99%

A crossvalidation-based comparison of kriging and IDW in local GNSS/levelling quasigeoid modelling

Ligas

Lucki

Banasik

2022

Reports on Geodesy and Geoinformatics

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“…Poland has a normal altitude system based on a quasi-geoid. Poland has two normal vertical frames based on a quasi-geoid: one with zero point in Amsterdam (PL-EVRF2007-NH), and the second in Kronstadt (PL-KRON86-NH) [97]. The differences among these data change irregularly, from 12 cm to 20 cm, depending on the area [98].…”

Section: Reference System and The Geoid Model Issuementioning

confidence: 99%

Altitude on Cartographic Materials and Its Correction According to New Measurement Techniques

et al. 2021

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Determining the correct height of mountain peaks is vital for tourism, but it is also important as a reference point for devices equipped with GPS (Global Positioning System), e.g., watches or car navigation systems. The peak altitude data are part of geographic and geodetic information. As more modern technologies and equipment become available, their precisions should increase. However, verification of peak heights is usually only conducted for the highest, well-known mountains—lower peaks or mountain passes are rarely verified. Therefore, this study focuses on an investigation of 12 altitude points on a section of the longest and most famous touristic trail in Poland (the Main Beskid Trail), located in the Orava–Żywiec Beskids Mts (Mountains). The aim of this research is to measure and verify the heights of the 12 selected mountain peaks, in addition to evaluating the chosen methods based on the quality of the obtained data and determining their suitability and opportunities for use in further research. Measurements were obtained at the most specific height points—on the 12 highest points of the summits. This study compares two modern measurement techniques: the global navigation satellite system (GNSS) and light detection and ranging (LiDAR). The obtained results were later compared with those widely used on the internet and in printed materials (period covered: 1884–2015). This analysis demonstrates that lesser-known objects are rarely the subject of remeasurement and significant altitude errors may occur, primarily because the heights originated from a source in the past when modern methods were not available. Our findings indicate that the heights of the peaks presented in cartographic materials are inaccurate. The assumed heights should be corrected by direct measurements using modern techniques.

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“…The Polish Head Office of Geodesy and Cartography (GUGiK) is responsible for the state reference network and recommend the methods of conversion for a detailed network (Somla, 2018). The paper presents those recommendations, analyses advantages and disadvantages (Banasik & Borowski, 2019) and shows an alternative method (Borowski & Banasik, 2020).…”

Section: The Conversion Of Heights Into the Pl-evrf2007-nh Frame For mentioning

confidence: 99%

Preface

Segliņš¹

2020

Geodynamics and Geospatial Research. Book of Abstracts and Articles

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addresses a wide range of scientific studies and is focused on the interdisciplinarity and possibilities of research in this wider context in the future to reach more significant discoveries, including business applications and innovations in solutions for commercial enterprises. The research presented at the conference is at different stages of its development and presents the achievements and the intended future. The publication is intended for researchers, students and research social partners as a source of current information and an invitation to join and support these studies.

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

Cited by 9 publications

References 9 publications

A crossvalidation-based comparison of kriging and IDW in local GNSS/levelling quasigeoid modelling

A crossvalidation-based comparison of kriging and IDW in local GNSS/levelling quasigeoid modelling

Altitude on Cartographic Materials and Its Correction According to New Measurement Techniques

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