CONCEPTUAL MODELING OF A GNSS-BASED GEODETIC CONTROL NETWORK FOR ELEVATED METRO CONSTRUCTION (CASE STUDY: TASHKENT CITY)

Authors

  • Ruzmatboev Izzatillo Khushnud ugli,Yusupjonov Otabek National University of Uzbekistan named after Mirzo Ulugbek,National University of Uzbekistan named after Mirzo Ulugbek,

DOI:

https://doi.org/10.55640/

Keywords:

elevated metro, GNSS, RTK, geodetic control network, conceptual modeling, accuracy assessment, Tashkent.

Abstract

This study presents a conceptual modeling of a GNSS-based geodetic control network for elevated metro construction using open spatial data. A 12 km model metro corridor in Tashkent city was analyzed using SRTM digital elevation data and OpenStreetMap infrastructure layers to simulate the route alignment. Theoretical accuracy assessments of GNSS Static and Real-Time Kinematic (RTK) methods were conducted and compared against conventional polygonometric surveying. Results demonstrate that GNSS Static post-processing provides horizontal accuracy of ±5 mm and vertical accuracy of ±8 mm, making it the most suitable method for rail alignment control. RTK mode offers efficient real-time accuracy for construction monitoring. An optimal control point spacing of 2 km is recommended for this type of infrastructure, with reduced intervals to 1 km in sections with terrain gradients exceeding 3%.

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References

[1] ISO 17123-8:2015, Optics and optical instruments — Field procedures for testing geodetic and surveying instruments — Part 8: GNSS field measurement systems in real-time kinematic (RTK). International Organization for Standardization, Geneva, 2015.

[2] Schofield, W. and Breach, M., Engineering Surveying, 6th ed. Butterworth-Heinemann, Oxford, 2007.

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[6] UIC (International Union of Railways), Track Geometry and Quality — Requirements for Urban Rail. UIC Leaflet 714, Paris, 2018.

[7] Mikhail, E. M. and Gracie, G., Analysis and Adjustment of Survey Measurements. Van Nostrand Reinhold, New York, 1981.

[8] Kaplan, E. D. and Hegarty, C. J. (Eds.), Understanding GPS/GNSS: Principles and Applications, 3rd ed. Artech House, Norwood, MA, 2017.

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Published

2026-03-10

Issue

Vol. 5 No. 03 (2026): Journal of Multidisciplinary Sciences and Innovations

Section

Articles

License

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Authors retain the copyright of their manuscripts, and all Open Access articles are disseminated under the terms of the Creative Commons Attribution License 4.0 (CC-BY), which licenses unrestricted use, distribution, and reproduction in any medium, provided that the original work is appropriately cited. The use of general descriptive names, trade names, trademarks, and so forth in this publication, even if not specifically identified, does not imply that these names are not protected by the relevant laws and regulations.

How to Cite

CONCEPTUAL MODELING OF A GNSS-BASED GEODETIC CONTROL NETWORK FOR ELEVATED METRO CONSTRUCTION (CASE STUDY: TASHKENT CITY). (2026). Journal of Multidisciplinary Sciences and Innovations, 5(03), 322-328. https://doi.org/10.55640/

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