BR21882366 — Development of a geoid model of the Republic of Kazakhstan as the basis of a unified state coordinate system and heights

Goal of the work: Creation of a local geoid model based on a combination of gravimetric, astronomical and geodetic data, global geopotential models and digital terrain models.

Relevance of the work: The creation of a high-precision geoid model for Kazakhstan is not only of great scientific importance, but also economically beneficial, as it will allow replacing complex and expensive geometric leveling methods with simpler and more accessible GNSS methods.

Scientific supervisor: Doctor of technical sciences, Professor,  Kasymkanova Khaini-kamal

Results obtained:  Within the research work, gravimetric data of the Republic of Kazakhstan were updated, including digitization of archival maps, spatial referencing, and the creation of a unified geospatial database. Field and laboratory studies were carried out to improve methods for measuring the gravitational constant and to analyze factors affecting measurement accuracy. A modern geoid model of Kazakhstan (QazGM2025) was developed using global geopotential models and the LSMSA method, achieving high agreement with GNSS/leveling data. A digital gravimetric map was produced, and gravimetric, geodetic, and geological datasets were integrated. An accredited gravimetric calibration range was established, and an updated methodology for gravimeter calibration was developed and implemented. Recommendations were prepared to reduce the cost of field gravimetric surveys and optimize measurement processes. Dissemination activities were conducted to share the research results with the scientific community and stakeholders.

List of publications with links to them

1. Shoganbekova D., Urazaliyev A., Sermiagin R., Nurakynov S., Kozhakhmetov M., Zhaksygul N., Islyamova A. Evaluation of a Soviet-Era Gravimetric Survey Using Absolute Gravity Measurements and Global Gravity Models: Toward the First National Geoid of Kazakhstan // Geosciences. — 2025. — Vol. 15. — Art. 404. — DOI: https://doi.org/10.3390/geosciences15100404. — URL: https://www.mdpi.com/2076-3263/15/10/404
2. Shoganbekova D., Urazaliyev A., Nurakynov S., Kozhakhmetov M., Zhaksygul N., Sermiagin R. Combination of Soviet-Era Surface Gravity and Modern Satellite Data for Geoid Model Computation: A Case Study for Kazakhstan // Computation. — 2025. — Vol. 13, No. 11. — Art. 260. — DOI: https://doi.org/10.3390/computation13110260. — URL: https://www.mdpi.com/2079-3197/13/11/260
3. Shoganbekova D., Urazaliyev A., Godah W., Nurakynov S., Zhaksygul N., Kozhakhmetov M. Temporal variations of geoid heights over Kazakhstan from GRACE–FO data and their relation with hydrological changes in the Caspian Sea and seismic activity // Frontiers in Earth Science. — 2025. — Vol. 13. — Art. 1662855. — DOI: https://doi.org/10.3389/feart.2025.1662855. — URL: https://www.frontiersin.org/journals/earth-science/articles/10.3389/feart.2025.1662855/abstract
4. Zhanakulova K., Adebiyet B., Orynbassarova E., Yerzhankyzy A., Kassymkanova K.-K., Abdykalykova R., Zakariya M. Application of Machine Learning Methods for Gravity Anomaly Prediction // Geosciences. — 2025. — Vol. 15, No. 5. — Art. 175. — DOI: https://doi.org/10.3390/geosciences15050175
5. Makhmetova G. N., Orynbassarova E. O., Kassymkanova Kh. M., Kulibaba S. B. Assessment of height determination accuracy in comparison of GNSS and high-precision levelling at geodynamic test site // Eurasian Mining. — 2025. — Vol. 43, No. 1. — P. 56–61. — DOI: https://doi.org/10.17580/em.2025.01.10
6. Sermiagin R., Kemerbayev N., Kassymkanova K.-K., Rakhimzhanov A., Kalen Y. Dataset from Scintrex CG-5 gravity meters acquired at the Zhetygen calibration line in Kazakhstan // Data in Brief. — 2025. — DOI: https://www.sciencedirect.com/science/article/pii/S2352340924011132
7. Kosarev N., Odalovic O., Sermiagin R., Kemerbayev N. Modeling of the vertical gravity gradient in the territory of the Republic of Kazakhstan: methods, comparison and evaluation of accuracy // Geodesy and Geodynamics. — 2025. — (in press). — CiteScore 4.7, Q2.
8. Urazaliyev A. S., Shoganbekova D. A., Nurakynov S., Kozhakhmetov M., Zhaksygul N., Sermiagin R. Hybrid Geoid Modeling with AI Enhancements: A Case Study for Almaty, Kazakhstan // Algorithms. — 2025. — (in press). — CiteScore 4.5, Q2.
9. Kenesbayeva A., Kassymkanova Kh. M., Bermukhanova A. M., Miletenko N. A. Creation of a gravimetric map and study of the deep structure of the Turkestan Region of the Republic of Kazakhstan.
10. Kemerbayev N., Zhumakanov A., Shkiyeva M., Kharisov A., Islyamova A., Sermiagin R., Zhanakulova K., Kalen E. Adjustment of the Local Gravimetric Network by Several Software Packages Using the Kazan Calibration Line as an Example // Russian Journal of Earth Science. — 2025. — DOI: https://doi.org/10.2205/2025ES001051
11. Kassymkanova Kh. M., Orynbassarova E. O., Urazaliyev A. S., Zhanakulova K. A. Method for determining gravimeter drift to ensure high-precision gravity measurements // Mining Journal of Kazakhstan. — 2024. — DOI: https://doi.org/10.48498/minmag.2024.234.10.005
12. Kemerbayev N. T., Mussina G. A., Shkiyeva M. Kh., Samarkhanov K. B., Batalova A. T., Rakhimzhanov A. N. Review of international calibration systems and their role in environmental studies // Hydrometeorology and Ecology. — 2024. — DOI: https://doi.org/10.54668/2789-6323-2024-115-4-152-166
13. Samarkhanov K. B., Mussina G. A., Shkiyeva M. Kh., Zhumakanov A. B., Orynbassarova E. O. Modern state of gravimetric research in Kazakhstan and prospects of satellite gravimetry for monitoring water bodies // Hydrometeorology and Ecology. — 2025. — DOI: https://doi.org/10.54668/2789-6323-2025-117-2-91-104
14. Kemerbayev N. T., Samarkhanov K. B., Mussina G. A., Shkiyeva M. Kh., Batalova A. T., Zhumakanov A. B., Venediktova A. Yu. Assessing water level variability in the Zhaiyk River Basin using GRACE satellite gravimetry and hydrological observations // Bulletin of Al-Farabi Kazakh National University. Geography Series. — 2025. — DOI: https://doi.org/10.26577/JGEM20257729
15. Kenesbayeva A., Kenbaev A., Akhmetov R., Ibraimova A. Prospects of satellite leveling application in the Republic of Kazakhstan // Mining Journal of Kazakhstan. — 2025. — DOI: https://doi.org/10.48498/minmag.2025.242.6.007
16. Zhanakulova K. A., Mels R. Zh., Kemerbayev N. T., Abdykalykov R. S. Determination of the vertical gravity gradient // Mining Journal of Kazakhstan. — 2025. — DOI: https://doi.org/10.48498/minmag.2025.242.6.004
17. Yerzhankyzy A., Nurakynov S., Bermukhanova A., Kozhakhmetov M. Creation of a gravimetric data database for the geoid model of Kazakhstan // Mining Journal of Kazakhstan. — 2025. — DOI: https://doi.org/10.48498/minmag.2025.242.6.003
18. Kenesbayeva A., Kuldeev E. I., Shalenov E. O., Nurpeissova T. B. Application of the kriging method for gravity data interpolation // Mining Journal of Kazakhstan. — 2025. — DOI: https://doi.org/10.48498/minmag.2025.242.6.002
19. Urazaliyev A. S., Shoganbekova D. A., Kozhakhmetov M. S., Zhaksygul N. N. Development of a Local Quasi-Geoid Model of Almaty City Using the Fast Collocation Method // News of the National Academy of Sciences of the Republic of Kazakhstan. Series of Geology and Technical Sciences. — 2025. — DOI: https://doi.org/10.32014/2025.2518-170X.564
20. Kassymkanova Kh. M., Malinnikova S. M., Nurakynov S., Turekhanova V. B. Study of geodynamic processes in mineral mining using quasi-geoid based on wavelet analysis // Eurasian Mining. — 2024. — Vol. 1(41). — P. 32–36.
21. Sermiagin R. A., Kemerbayev N. T., Kassymkanova K.-K. M., Kalen E., Mussina G. A., Shkiyeva M. Kh., Samarkhanov K. B., Batalova A. T., Rakhimzhanov A. N., Zhumakanov A. B., Kosarev N. S. Historical overview of gravimetric works in Kazakhstan // Geodesy and Cartography. — 2024. — No. 10. — P. 53–64. — DOI: https://doi.org/10.22389/0016-7126-2024-1012-10-53-64
22. Kassymkanova Kh. M., Orynbassarova E. O., Zhanakulova K. A., Adyebiyet B. The path of relative gravimetric measurements: from pendulum to microchip // Mining Journal of Kazakhstan. — 2024. — No. 4. — DOI: https://doi.org/10.48498/minmag.2024.228.4.005
23. Kassymkanova Kh. M., Kenesbayeva A., Orynbassarova E. O., Zhanakulova K. A., Adyebiyet B. Preparation of gravimetric basis for geoid model of Kazakhstan // Bulletin of East Kazakhstan Technical University. — 2024. — No. 3. — DOI: 10.51885/1561-4212_2024_3_62
24. Shoghanbekova D. A., Urazaliyev A. S., Kassymkanova Kh. M., Kozhakhmetov M. S. Assessment of global geopotential models for Turkestan region // Bulletin of AUES. — 2024. — No. 2 (65).
25. Shoghanbekova D. A., Urazaliyev A. S., Kassymkanova Kh. M., Kozhakhmetov M. S., Kydyrkozhakyzy Sh. Assessment of global geopotential models in Kazakhstan based on geoid heights and gravity anomalies // Bulletin of KazGASA. — 2024. — DOI: https://doi.org/10.51488/1680-080X/2024.2-14