EN
Determination of Orthometric Height using GNSS and EGM Data: a Scenario of the Federal University of Technology Akure
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.
Keywords
References
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Details
Primary Language
English
Subjects
Engineering
Journal Section
Research Article
Publication Date
March 7, 2021
Submission Date
June 18, 2020
Acceptance Date
December 2, 2020
Published in Issue
Year 2021 Volume: 8 Number: 1
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
AMA
1.Tata H, Olatunji R. Determination of Orthometric Height using GNSS and EGM Data: a Scenario of the Federal University of Technology Akure. IJEGEO. 2021;8(1):100-105. doi:10.30897/ijegeo.754808
Chicago
Tata, Herbert, and Raufu Olatunji. 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.
EndNote
Tata H, Olatunji R (March 1, 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.
IEEE
[1]H. Tata and R. Olatunji, “Determination of Orthometric Height using GNSS and EGM Data: a Scenario of the Federal University of Technology Akure”, IJEGEO, vol. 8, no. 1, pp. 100–105, Mar. 2021, doi: 10.30897/ijegeo.754808.
ISNAD
Tata, Herbert - Olatunji, Raufu. “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 (March 1, 2021): 100-105. https://doi.org/10.30897/ijegeo.754808.
JAMA
1.Tata H, Olatunji R. Determination of Orthometric Height using GNSS and EGM Data: a Scenario of the Federal University of Technology Akure. IJEGEO. 2021;8:100–105.
MLA
Tata, Herbert, and Raufu Olatunji. “Determination of Orthometric Height Using GNSS and EGM Data: A Scenario of the Federal University of Technology Akure”. International Journal of Environment and Geoinformatics, vol. 8, no. 1, Mar. 2021, pp. 100-5, doi:10.30897/ijegeo.754808.
Vancouver
1.Herbert Tata, Raufu Olatunji. Determination of Orthometric Height using GNSS and EGM Data: a Scenario of the Federal University of Technology Akure. IJEGEO. 2021 Mar. 1;8(1):100-5. doi:10.30897/ijegeo.754808
Cited By
Determination of Orthometric Heights of Points Using Gravimetric/GPS and Geodetic Levelling Approaches
International Journal of Environment and Geoinformatics
https://doi.org/10.30897/ijegeo.899062