On the performance of GNSS levelling over steep slopes

Erenoǧlu, Ramazan Cüneyt; Yücel, Mehmet Ali; Pirti, Atınç; Şanli, D. Uğur

doi:10.1590/s1982-21702012000400008

Cited by 6 publications

(5 citation statements)

References 8 publications

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“…The height differences between the points obtained by the geometric levelling are adopted as reference values and the analysis of the internal and external measurement accuracy is given. In the paper [5], a study of use of the GNSS method for determining height differences in case of steep terrain was presented. In comparison with the results of the geometric and trigonometric levelling, the GNSS method has shown satisfactory accuracy.…”

Section: међународна конференцијаmentioning

confidence: 99%

“…geod., University of Novi Sad, Faculty of Technical Sciences, D. Obradović Square 6, Novi Sad, Serbia, tel: ++381 21 450 810, e -mail: mehmed@uns.ac.rs 4 Igor Sabadoš, dipl.inž. geod., University of Novi Sad, Faculty of Technical Sciences, D. Obradović Square 6, Novi Sad, Serbia, tel: ++381 21 450 810, e -mail: igorsabados@uns.ac.rs 5 Marina Davidović, dipl.inž. geod., University of Novi Sad, Faculty of Technical Sciences, D. Obradović Square 6, Novi Sad, Serbia, tel: ++381 21 450 810, e -mail: marina.davidovic@uns.ac.rs…”

Section: Introductionmentioning

confidence: 99%

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Komparativna Analiza Geometrijskog Nivelmana I Statičke GNSS Metode Pri Razvoju Jednodimenzionalne Mikro Mreže

Markovic¹,

Kuzmić²,

Batilović³

et al. 2019

Zbornik GFS

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The paper analyzes two geodetic methods for data collection-geometric levelling and static GNSS (Global Navigation Satellite System). For the purpose of monitoring the occurrence of landslide and deformations-the subsidence of the terrain and object (St. Nicholas Church in Stari Slankamen), the localization and stabilization of one-dimensional micro-network in the area surrounding the church was performed. The network was developed on a stable terrain as a reference basis for observing the church's subsidence by means of geodetic benchmarks built into the very foundations of the church. Height differences between the points of the network were determined by using geometric levelling and static GNSS method and the obtained values were compared. The height differences obtained with these two methods vary several millimeters. Based on the conducted research, the paper considers advantages and disadvantages of both methods, analysis the accuracy of the obtained results and possible application of these two methods.

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Section: међународна конференцијаmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Komparativna Analiza Geometrijskog Nivelmana I Statičke GNSS Metode Pri Razvoju Jednodimenzionalne Mikro Mreže

Markovic¹,

Kuzmić²,

Batilović³

et al. 2019

Zbornik GFS

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show abstract

“…In the past, several authors have shown that GNSS levelling, i.e., the combination of GNSS height determination and geoid models, is an economic technique for determining physical heights [31][32][33][34][35][36][37]. However, the method itself is limited in two aspects: the accuracy of the ellipsoid height determination and the accuracy of the geoid model.…”

Section: Introductionmentioning

confidence: 99%

“…Several authors have claimed that by using GNSS levelling, a height determination accuracy of 1 cm can be achieved [46][47][48]. However, additional studies have shown that it is almost impossible to achieve such an accurate geoid model in mountainous regions [36,49]. The Earth's external gravitational field and is functionals (in addition to the geoid heights of interest and the gravitational anomalies and potential) can be determined using global gravity models (GGMs).…”

Section: Introductionmentioning

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 Global Navigation Satellite System (GNSS), through the use of satellite tracking equipment, allows ellipsoidal heights (h) to be obtained, which, depending on the positioning technique, can reach sub-centimeter accuracies (Erenoglu et al, 2012;Wang, 2013;Scholarin & Awange, 2015;Luna et al, 2017). The determination of these heights, together with geoid undulation values (N, from local or global models), allow the estimation of orthometric heights based on equation (1).…”

Section: Introductionmentioning

confidence: 99%

Validation of the GPS leveling method through the gradient analysis of the geoidal wave. Case study of Ecuador.

Enríquez¹,

Leiva²,

Cárdenas³

et al. 2021

RGV

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We validated the GPS leveling as an alternative to the traditional geometric leveling method. Validation compares the geometric slopes derived from the GNSS positioning technique, heights resulting from geometric leveling campaigns and geoid undulations extracted from the Global Geopotential Model EGM08. This analysis was performed in the Ecuadorian mainland, where we identified areas in which the gradient of the geoidal undulation is less pronounced. The spatialization of the gradient or variation-based methods allowed to analyze the performance of the GPS leveling method, under the hypothesis that less variability in geoid undulation implies less discrepancies in the GPS unevenness. GNSS observations were determined on the leveling plates belonging to the Basic Vertical Control Network. The results of the study are given based on the relative error resulting from the comparison of the traditional differential leveling method with the corresponding values obtained from the GNSS positioning, considering different distances for the spread of unevenness.

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On the performance of GNSS levelling over steep slopes

Cited by 6 publications

References 8 publications

Komparativna Analiza Geometrijskog Nivelmana I Statičke GNSS Metode Pri Razvoju Jednodimenzionalne Mikro Mreže

Komparativna Analiza Geometrijskog Nivelmana I Statičke GNSS Metode Pri Razvoju Jednodimenzionalne Mikro Mreže

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

Validation of the GPS leveling method through the gradient analysis of the geoidal wave. Case study of Ecuador.

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