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Year 2021, Volume: 8 Issue: 1, 100 - 105, 07.03.2021
https://doi.org/10.30897/ijegeo.754808

Abstract

References

  • Alaa A. Hussein and Faleh H. Mahmood (2016) Determination local geoid Heights Using RTK-DGPS/Leveling and transformation methods. Iraqi Journal of Science, 57 (2), 1604-1611
  • Aleem, K.F., Adesoye, A.A., and Bankole, A.L. (2016). Practical Determination of Geoidal Undulation and Geoidal Map of Part of Mubi, Adamawa State, Nigeria. International Journal of Engineering Research and Technology (IJERT). 4 (5): 2278-0181
  • Benjamin J.B., Ahmed M., and Matapa J.I. (2017). Assessment of Geoidal Undulation Values Computed with Reference to Different Earth Gravity Models. IOSR Journal of Environmental Science, Toxicology and Food Technology (IOSR-JESTFT), 11 (6), 64-72
  • Featherstone, W.E., Dentith, M.C., and Kirby, J.F. (1998). Strategies for Accurate Determination of Orthometric Heights from GPS, Survey Review, 34 (267), 278-296.
  • Featherstone, W.E., (2008). GNSS-based Heighting in Australia: Current Emerging and Future Issues. Spatial Science, 53(2), 115-133.
  • Fotopoulus, G. (2003). An Analysis on the Optimal Combination of Geoid, Orthometric, and Ellipsoidal Height Data. PhD Thesis, Department of Geomatics Engineering, University of Calgary. UCGE Reports No. 20185. Available at http://www.geomatics.ucalgary.com/links/gradtheses.html, 258 pages.
  • Heiskanen, W.A., and Moritz, H. (1967). Physical Geodesy, Freeman and Company, San Francisco, 364 pages
  • Isioye, O. A., and Musa, A. (2007). The use of geodetic levelling for crustal movement and deformation studies: A 30-year case study in Ahmadu Bello University Zaria. The Information Manager, 7(2), 28-39.
  • Misra P. and Enge P. (2006). Global Positioning System - Signals, Measurements, and Performance (2nd edition), Ganga-Jamuna Press, Massachusetts. Olaleye, J.B., Badejo, O.T., Olusina, J.O., and Aleem, K.F. (2013). Rectangular ‘Satlevel’ Model for Quick Determination of Geoid: A Case Study of Lagos State of Nigeria. Journal of Emerging Trends in Engineering and Applied Sciences (JETEAS) 4(5), 699-706
  • Opaluwa Y. D. and Adejare Q. A. (2011). Derivation of Orthometric Heights from GPS Measured Heights Using Geometrical Technique and EGM 96 Model. FUTY Journal of the Environment; 5(1), 1-20 DOI: 10.4314/fje.v5i1.63477
  • Robert, R., Sujoy K.J., Rabindra, K.D., and Dilip, K.P. (2016). Evaluation of Orthometric Heights from GPS Survey using a Geoid Model – A Case Study for Madang, Papua New Guinea. International Journal of Advancements in Research & Technology, 5 (5), 9-16.
  • Kemboi K. E. and Odera P. A. (2016). Estimation of Orthometric Height Using EGM2008 and GPS Over Nairobi County and Its Environs. Jomo Kenyatta University of Agriculture and Technology, Nairobi, Kenya 17 (2), 118-131
  • URL1: https://geographiclib.sourceforge.in/cgi-bin/GeoidEval

Determination of Orthometric Height using GNSS and EGM Data: a Scenario of the Federal University of Technology Akure

Year 2021, Volume: 8 Issue: 1, 100 - 105, 07.03.2021
https://doi.org/10.30897/ijegeo.754808

Abstract

The advent of Global Navigation Satellite System (GNSS) and Earth Gravitational Model (EGM)particularly Global Positioning System (GPS) has modernized geodetic surveying in providing horizontal and vertical positions of points with a sub-meter level of accuracy over the reference ellipsoid. The GPS gives ellipsoidal heights which makes the conversion of the heights to orthometric heights possible by incorporating a geoid model. The conventional method of determining orthometric height is tedious, time-consuming, and labour intensive. This study entails the determination of orthometric height using GNSS and EGM data. A total of forty-nine (49) stations selected within the study area were occupied for GPS observation using South DGPS instrument in static mode for the position and ellipsoidal height determination. The geoidal height values of the GPS derived data were computed using GeoidEval utility software with reference to three different EGMs (EGM2008, EGM96 and EGM84). In order to determine the orthometric heights of the selected stations, the difference between the EGM geoidal height values (NEGM) and the ellipsoidal heights were computed. The results show that the orthometric height obtained with respect to EGM2008 gives better results with a standard deviation of 9.530m and a standard error of 1.361m. The study reveals that the use of GNSS and EGM data for orthometric height determination is less expensive, less tedious, accurate and time-saving compared to the conventional approach of geodetic and spirit levelling.

References

  • Alaa A. Hussein and Faleh H. Mahmood (2016) Determination local geoid Heights Using RTK-DGPS/Leveling and transformation methods. Iraqi Journal of Science, 57 (2), 1604-1611
  • Aleem, K.F., Adesoye, A.A., and Bankole, A.L. (2016). Practical Determination of Geoidal Undulation and Geoidal Map of Part of Mubi, Adamawa State, Nigeria. International Journal of Engineering Research and Technology (IJERT). 4 (5): 2278-0181
  • Benjamin J.B., Ahmed M., and Matapa J.I. (2017). Assessment of Geoidal Undulation Values Computed with Reference to Different Earth Gravity Models. IOSR Journal of Environmental Science, Toxicology and Food Technology (IOSR-JESTFT), 11 (6), 64-72
  • Featherstone, W.E., Dentith, M.C., and Kirby, J.F. (1998). Strategies for Accurate Determination of Orthometric Heights from GPS, Survey Review, 34 (267), 278-296.
  • Featherstone, W.E., (2008). GNSS-based Heighting in Australia: Current Emerging and Future Issues. Spatial Science, 53(2), 115-133.
  • Fotopoulus, G. (2003). An Analysis on the Optimal Combination of Geoid, Orthometric, and Ellipsoidal Height Data. PhD Thesis, Department of Geomatics Engineering, University of Calgary. UCGE Reports No. 20185. Available at http://www.geomatics.ucalgary.com/links/gradtheses.html, 258 pages.
  • Heiskanen, W.A., and Moritz, H. (1967). Physical Geodesy, Freeman and Company, San Francisco, 364 pages
  • Isioye, O. A., and Musa, A. (2007). The use of geodetic levelling for crustal movement and deformation studies: A 30-year case study in Ahmadu Bello University Zaria. The Information Manager, 7(2), 28-39.
  • Misra P. and Enge P. (2006). Global Positioning System - Signals, Measurements, and Performance (2nd edition), Ganga-Jamuna Press, Massachusetts. Olaleye, J.B., Badejo, O.T., Olusina, J.O., and Aleem, K.F. (2013). Rectangular ‘Satlevel’ Model for Quick Determination of Geoid: A Case Study of Lagos State of Nigeria. Journal of Emerging Trends in Engineering and Applied Sciences (JETEAS) 4(5), 699-706
  • Opaluwa Y. D. and Adejare Q. A. (2011). Derivation of Orthometric Heights from GPS Measured Heights Using Geometrical Technique and EGM 96 Model. FUTY Journal of the Environment; 5(1), 1-20 DOI: 10.4314/fje.v5i1.63477
  • Robert, R., Sujoy K.J., Rabindra, K.D., and Dilip, K.P. (2016). Evaluation of Orthometric Heights from GPS Survey using a Geoid Model – A Case Study for Madang, Papua New Guinea. International Journal of Advancements in Research & Technology, 5 (5), 9-16.
  • Kemboi K. E. and Odera P. A. (2016). Estimation of Orthometric Height Using EGM2008 and GPS Over Nairobi County and Its Environs. Jomo Kenyatta University of Agriculture and Technology, Nairobi, Kenya 17 (2), 118-131
  • URL1: https://geographiclib.sourceforge.in/cgi-bin/GeoidEval
There are 13 citations in total.

Details

Primary Language English
Subjects Engineering
Journal Section Research Articles
Authors

Herbert Tata 0000-0002-9755-1612

Raufu Olatunji 0000-0003-3474-8618

Publication Date March 7, 2021
Published in Issue Year 2021 Volume: 8 Issue: 1

Cite

APA Tata, H., & Olatunji, R. (2021). Determination of Orthometric Height using GNSS and EGM Data: a Scenario of the Federal University of Technology Akure. International Journal of Environment and Geoinformatics, 8(1), 100-105. https://doi.org/10.30897/ijegeo.754808