<i>Litpos</i> - A Part of <i>EUPOS</i>®

Paršeliūnas, Eimuntas; Büga, Arūnas; Marozas, Leonardas; Petniunas, Marius; Urbanas, S A Concesiones

doi:10.3846/1392-1541.2008.34.50-57

Cited by 10 publications

(3 citation statements)

References 2 publications

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“…It combines a network of base GNSS stations with dedicated communication channels and appropriate hardware and software. LitPOS permanent reference stations provide data for real-time and post-processing applications and cover the whole territory of Lithuania [47]. This method was used for setting up known points and estimating the quantities of stockpiles volumes for later comparison with UAV-based photogrammetric approaches.…”

Section: Conventional Approachmentioning

confidence: 99%

Geometric Accuracy of 3D Reality Mesh Utilization for BIM-Based Earthwork Quantity Estimation Workflows

Kavaliauskas

Židanavičius

Jurelionis

2021

IJGI

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Current surveying techniques are typically applied to survey the as-is condition of buildings, brownfield sites and infrastructure prior to design. However, within the past decade, these techniques evolved significantly, and their applications can be enhanced by adopting unmanned aerial vehicles (UAVs) for data acquisition, up-to-date software for creating 3D reality mesh, which in turn opens new possibilities for much more efficient construction site surveying and constant updating and process management. In this study the workflows of three UAV-based photogrammetry techniques: Real Time Kinematic (RTK), Post-Processing Kinematic (PPK) and Global Positioning System (GPS) based on control points were analyzed, described, and compared to conventional surveying method with Global Navigation Satellite System (GNSS) receiver. Tests were performed under realistic conditions in 36 ha quarry in Lithuania. The results of the relationship between ground sample distance (GSD) and the comparison of volume measurements under each technique, including conventional method were analyzed. The deviation of data collected on field vs. generated in reality mesh, including ground control points (GCPs) and check points (CHPs) with different configurations, was investigated. The research provides observations on each workflow in the terms of efficiency and reliability for earthwork quantity estimations and explains processing schemes with advanced commercial software tools.

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Section: Conventional Approachmentioning

confidence: 99%

Geometric Accuracy of 3D Reality Mesh Utilization for BIM-Based Earthwork Quantity Estimation Workflows

Kavaliauskas

Židanavičius

Jurelionis

2021

IJGI

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“…For real-time services it is sufficient to enter in the receiver software appropriate options such as the port number of the selected service and the username and password obtained by registering each user of the system. In Europe, there are many similar systems [Parseliunas E. et al 2007]. The themes of the technical details of the construction of similar networks and their applications can also be found in many references [Brockmann E. 2009], [Habrich H. 2007], [Hirt C. 2011].…”

Section: Description Of the Systemmentioning

confidence: 99%

Comparative Analysis of Satellite Measurements Calculation Results Using the Postprocessing Services: Asg-Eupos (Poland), Apps (USA) and CSRS (Canada)

Mika

Kudach

2014

Artificial Satellites

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The publication has a cognitive research character. It presents a comparative analysis of free Internet services in Poland and abroad, used to adjust the data obtained using satellite measurement techniques. The main aim of this work is to describe and compare free tools for satellite data processing and to examine them for possible use in the surveying works in Poland. Among the many European and global services three of them dedicated to satellite measurements were selected: ASG-EUPOS (Poland), APPS (USA) and CSRS (Canada). The publication contains the results of calculations using these systems. Calculations were based on RINEX files obtained via postprocessing service (ASG-EUPOS network) POZGEO D for 12 reference stations in the South Poland. In order to examine differences in results between the ASG-EUPOS, APPS and CSRS the transformation points coordinate to a single coordinate system ETRF 2000 (in force in Poland) was made. Studies have shown the possibility of the calculation in Poland (in postprocessing mode) using the analyzed applications with global coverage.

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“…Others based their EUPOS Geodetic subservice on their own computational algorithms (e.g., Active Geodetic Network-EUPOS [ASG-EUPOS] in Poland). Accuracies possible thanks to real-time corrections in individual national positioning systems have been studied extensively [6][7][8][9][10][11]. Still, there are no publications on the determination of the accuracy, precision, and repeatability of the solutions offered by the APPS sub-services in individual national systems.…”

Section: Introductionmentioning

confidence: 99%

Validation of the number of tie vectors in post-processing using the method of frequency in a centric cube

Kudas

Wnęk

2020

Open Geosciences

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AbstractThe systems belonging to the European Position Determination System (EUPOS) are obliged to have a sub-service for automatic post-processing (APPS) of static satellite user observations based on observations registered by reference stations. The optimization of the number of tie vectors to reference stations is determined by the authors of APPS algorithms and is a key issue. The study validates the determination of the position of a point based on a smaller number of tie vectors than for the standard solution provided by a sub-service on an example of APPS of the Polish Active Geodetic Network (ASG-EUPOS). It was shown that the reduction of the number of tie vectors by one does not result in a significant deterioration of the accuracy of the obtained coordinates. The other objective of this study is to propose a method for comparing 3D sets. This method is based on 3D figures of assessment and a modification of a method for comparing text sets. The proposed method was validated by comparison with the Spearman correlation coefficient and Mahalanobis distance. The usefulness of the method for similarity and dissimilarity analyses of 3D sets has been demonstrated with an example of comparing the combination of reference vectors with a standard solution of APPS of ASG-EUPOS.

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Litpos - A Part of EUPOS®

Cited by 10 publications

References 2 publications

Geometric Accuracy of 3D Reality Mesh Utilization for BIM-Based Earthwork Quantity Estimation Workflows

Geometric Accuracy of 3D Reality Mesh Utilization for BIM-Based Earthwork Quantity Estimation Workflows

Comparative Analysis of Satellite Measurements Calculation Results Using the Postprocessing Services: Asg-Eupos (Poland), Apps (USA) and CSRS (Canada)

Validation of the number of tie vectors in post-processing using the method of frequency in a centric cube

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