Home Assessing the quality of GEOID12B model through field surveys
Article
Licensed
Unlicensed Requires Authentication

Assessing the quality of GEOID12B model through field surveys

  • Ahmed Elaksher EMAIL logo , Franck Kamtchang , Christian Wegmann and Adalberto Guerrero
Published/Copyright: January 2, 2018
Become an author with De Gruyter Brill

Abstract

Elevation differences have been determined through conventional ground surveying techniques for over a century. Since the mid-80s GPS, GLONASS and other satellite systems have modernized the means by which elevation differences are observed. In this article, we assessed the quality of GEIOD12B through long-occupation GNSS static surveys. A set of NGS benchmarks was occupied for at least one hour using dual-frequency GNSS receivers. Collected measurements were processed using a single CORS station at most 24 kilometers from the benchmarks. Geoid undulation values were driven by subtracting measured ellipsoidal heights from the orthometric heights posted on the NGS website. To assess the quality of GEOID12B, we compared our computed vertical shifts at the benchmarks with those estimated from GEOID12B published by NGS. In addition, Kriging model was used to interpolate local maps for the geoid undulations from the benchmark heights. The maps were compared with corresponding parts of GEOID12B. No biases were detected in the results and only shifts due to random errors were found. Discrepancies in the range of ten centimetres were noticed between our geoid undulation and the values available from NGS.

References

[1] Jin S. (2012) Global navigation satellite systems signal, theory and applications. InTech.10.5772/1134Search in Google Scholar

[2] Roman, D. R., Y. M. Wang, J. Saleh, and X. Li (2009) USGG2009, GEOID09, and DEFLEC09: Updated Models for the United States and Its Territories. In AGU spring meeting abstracts, Toronto, Ontario, Canada, May 24–27 2009.Search in Google Scholar

[3] Arifuzzaman K. and R. J. Hintz (2016) A spatial analysis of GEOID03 and GEOID09 in Connecticut. Journal of Applied Geodesy 10(2): 95–102.10.1515/jag-2015-0013Search in Google Scholar

[4] Roman, D. R., Y. M. Wang, J. Saleh, and X. Li (2010). Final national models for the United States: Development of GEOID09. Technical Details webpage, National Geodetic Survey, Silver Spring MD. https://www.ngs.noaa.gov/GEOID/GEOID09/GEOID09_tech_details.pdf. Accessed February 2017.Search in Google Scholar

[5] Erol, B., S. Erol, and R. N. Çelik (2008) Height transformation using regional geoids and GPS/leveling in Turkey. Survey Review 40(307): 2–18.10.1179/003962608X253394Search in Google Scholar

[6] Soycan, M. (2013) Analysis of geostatistical surface model for GPS height transformation: a case study in Izmir territory of Turkey. Geodetski Vestnik 57(4): 702.10.15292/geodetski-vestnik.2013.04.702-718Search in Google Scholar

[7] Gucek M. and T. Bašić (2009) Height transformation models from ellipsoidal into the normal orthometric height system for the territory of the city of Zagreb. Studia Geophysica et Geodaetica 53(1): 17–38.10.1007/s11200-009-0002-1Search in Google Scholar

[8] Kotsakis C. and K. Katsambalos (2010) Quality analysis of global geopotential models at 1542 GPS/leveling benchmarks over the Hellenic mainland. Survey Review 42(318): 327–344.10.1179/003962610X12747001420500Search in Google Scholar

[9] Alevizakou E. G. and E. Lambrou (2011) Fast and convenient determination of geoid undulation N in an urban area. FIG Working Week 2011, Marrakech, Morocco, May 18–22, 2011.Search in Google Scholar

[10] Erenoglu, R. C., M. A. Yucel, A. Pirti, and D. U. Sanli (2012) On the performance of GNSS leveling over steep slopes. Boletim de Ciências Geodésicas 18(4): 645–660.10.1590/S1982-21702012000400008Search in Google Scholar

[11] Ahamed A. E. M. (2013) GPS ellipsoid height calibration to determine the approximate mean sea level (orthometric) height. International Journal of Advanced Research in Engineering and Applied Sciences 2(8): 10–20.Search in Google Scholar

[12] Georgopoulos G. D. and E. C. Telioni (2015) Determination of local geoid model in Attica Basin Greece. Survey Review 47(341): 109–114.10.1179/1752270614Y.0000000096Search in Google Scholar

[13] Pavlis, N. K., S. A. Holmes, S. C. Kenyon, and J. K. Factor (2012) The development and evaluation of the Earth Gravitational Model 2008 (EGM2008). Journal of Geophysical Research: Solid Earth (117) B4.10.1029/2011JB008916Search in Google Scholar

[14] Kemboi K. E. and P. A. Odera (2016) Estimation of orthometric height using EGM2008 and GPS over Nairobi county and its environs. Journal of Agriculture Science and Technology 17(2): 118–131.Search in Google Scholar

[15] Odera P. A. and Y. Fukuda (2015) Recovery of orthometric heights from ellipsoidal heights using offsets method over Japan. Earth, Planets and Space 67(1): 134.10.1186/s40623-015-0306-zSearch in Google Scholar

[16] Al-Krargy, E. M, M. I. Doma and G. M. Dawod (2014) Towards an accurate definition of the local geoid model in Egypt using GPS/leveling data: a case study at Rosetta zone. International Journal of Innovative Science and Modern Engineering 2(11): 10–15.Search in Google Scholar

[17] Roman, D. R., Y. M.Wang, W. Henning, and J. Hamilton (2004). Assessment of the new national geoid height model-GEOID03. Surveying and Land Information Science, 64(3): 153.Search in Google Scholar

[18] Fotopoulos (2003). An Analysis on the Optimal Combination of Geoid, Orthometric and Ellipsoidal Height Data. PhD Thesis, University of Calgary, Department of Geomatics Engineering, Alberta, Canada. Available online at https://pdfs.semanticscholar.org/294d/4e7fc29c08b92869e05ad2ef7c8015f7a589.pdf Accessed July 2017.Search in Google Scholar

[19] Kutner H. M., J. C.Nachtsheim, J. Neter, and W. Li Applied linear statistical models. 5th ed., Boston, USA, McGraw-Hill, 2005.Search in Google Scholar

[20] Snay R. A. and T. Soler (2008) Continuously operating reference station (CORS): history, applications, and future enhancements. Journal of Surveying Engineering 134(4): 95–104.10.1061/(ASCE)0733-9453(2008)134:4(95)Search in Google Scholar

[21] Ogaja C. A. (2016) Geomatics engineering: a practical guide to project design. CRC Press.10.1201/9781439895115Search in Google Scholar

[22] Grafarend, E. W., W. K. Friedrich, and V. S. Schwarzeeds (2013) Geodesy the challenge of the 3rd Millennium. Springer Science & Business Media.Search in Google Scholar

[23] Yarlagadda, R., I. Ali, N. Al-Dhahir, and J. Hershey (2000) GPS GDOP metric. IEE Proceedings-radar, Sonar and Navigation 147(5): 259–264.10.1049/ip-rsn:20000554Search in Google Scholar

[24] Hastaoglu K. O. and D. U. Sanli (2011) Accuracy of GPS rapid static positioning: application to Koyulhisar Landslide, central Turkey. Survey Review 43(321): 226–240.10.1179/003962611X12894696205145Search in Google Scholar

[25] El-Rabbany A. (2006) Introduction to GPS: The Global Positioning System, Second Edition, Artech House Publishers.Search in Google Scholar

[26] Soler, T., P. Michalak, N. D. Weston, R. A. Snay, and R. H. Foote (2006) Accuracy of OPUS solutions for 1- to 4-h observing sessions. GPS Solutions 10(1): 45–55.10.1007/s10291-005-0007-3Search in Google Scholar

[27] Cressie, N. (1990) The origins of kriging. Mathematical Geology 22(3): 239–252.10.1007/BF00889887Search in Google Scholar

[28] https://www.ngs.noaa.gov/web/news/GEOID12_Error_Notice.shtml Accessed July 2017.Search in Google Scholar

[29] https://www.ngs.noaa.gov/GEOID/GEOID12B/GEOID12B_TD.shtml Accessed July 2017.Search in Google Scholar

[30] Sheng, Z. (2013). Impacts of groundwater pumping and climate variability on groundwater availability in the Rio Grande Basin. Ecosphere 4(1): 1–25.10.1890/ES12-00270.1Search in Google Scholar

[31] https://www.ngs.noaa.gov/faq.shtml#WhatVD29VD88 Accessed July 2017.Search in Google Scholar

[32] https://www.ngs.noaa.gov/FGCS/tech_pub/1984-stds-specs-geodetic-control-networks.htm Accessed July 2017.Search in Google Scholar

[33] https://www.ngs.noaa.gov/GEOID/GEOID12/ Accessed July 2017.Search in Google Scholar

Received: 2017-4-10
Accepted: 2017-7-22
Published Online: 2018-1-2
Published in Print: 2018-1-26

© 2018 Walter de Gruyter GmbH, Berlin/Boston

Downloaded on 23.11.2025 from https://www.degruyterbrill.com/document/doi/10.1515/jag-2017-0013/html
Scroll to top button