A new challenge for cadastral surveying in Taiwan: feasibility analysis using combination on CORS data and online PPP service
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Ming-Kuang Ho
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Tung-Shan Liao
Abstract
Relative GNSS positioning, a longstanding measurement standard, often incurs high manpower and equipment costs. Online Precise Point Positioning (PPP) presents a cost-effective alternative by minimizing these expenses. However, transitioning from the ITRF2014 to the TWD97[2010] coordinate system presents unique challenges. This study evaluates the efficacy of five PPP services – AUSPOS, OPUS, CSRS-PPP, magicGNSS, and RTX-PP – using 2018 Continuously Operating Reference Stations (CORS) data. Following a seven-parameter transformation, we systematically compared these services to identify the optimal solution for Taiwan’s geodetic survey needs. Our analysis reveals that RTX-PP offers superior performance, achieving 1 cm accuracy over 24 h and 4 cm accuracy over 1 h. Most stations met these accuracy standards, even during short observation intervals from September 9, 2018. Nonetheless, there is a 24.1 % likelihood of exceeding the 6 cm accuracy threshold due to variations in GNSS data quality. To address this, we employed G-Nut software to analyze station data quality across regions, recommending station selection based on data ratio and cycle slips to improve PPP solution accuracy effectively.
Funding source: National Science and Technology Council
Award Identifier / Grant number: NSTC 112-2622-E-305-005
Funding source: Department of Land Administration, Ministry of the Interior, Taiwan
Award Identifier / Grant number: 110CCL028C
Acknowledgments
The authors are thankful to the reviewer for constructive comments and recommendations on an earlier version of the manuscript.
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Research ethics: Not applicable.
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Author contributions: The authors have accepted responsibility for the entire content of this manuscript and approved its submission.
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Competing interests: The authors state no conflict of interest.
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Research funding: This research was made possible by the generous support of the Department of Land Administration, Ministry of the Interior, Taiwan (Project Code: 110CCL028C), which provided both funding and observational data. The authors also would like to thank the National Science and Technology Council of the Republic of China, Taiwan, for financially supporting this research under Contract No. NSTC 112-2622-E-305-005.
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Data availability: The raw data can be obtained on request from the corresponding author.
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© 2024 Walter de Gruyter GmbH, Berlin/Boston
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Articles in the same Issue
- Frontmatter
- Review
- Advancing polar motion prediction with derivative information
- Original Research Articles
- Analyses of data from the first Chinese seismo electromagnetic satellite (CSES-01) together with other earthquake precursors associated with the Turkey earthquakes (February 6, 2023)
- Regional evaluation of global geopotential models and three types of digital elevation models with ground-based gravity and GNSS/levelling data using several techniques over Sudan
- Correlation between rate of TEC index and positioning error during solar flares and geomagnetic storms using navigation with Indian constellation receiver measurements
- Analyzing recent deformation in Wadi Hagul, Eastern Desert, Egypt, via advanced remote sensing and geodetic data processing
- Monitoring of a rockfill embankment dam using TLS and sUAS point clouds
- The Modified Ambiguity Function Approach with regularization for instantaneous precise GNSS positioning
- A new challenge for cadastral surveying in Taiwan: feasibility analysis using combination on CORS data and online PPP service
- Occurrence characteristics of ionospheric scintillations in the civilian GPS signals (L1, L2, and L5) through a dedicated scintillation monitoring receiver at a low-latitude location in India during the 25th solar cycle
