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Contribution of GPS-GNSS technology to the determination of altimetric measurements: Case of the Commune of Abomey-Calavi, Benin

Author Affiliations

  • 1Engineer in Geodesy, Department of Civil Engineering of the Polytechnic School of Abomey-Calavi, University of Abomey-Calavi, Benin
  • 2Design Engineer, Geometer-Topographer, Ecole Polytechniqued\' Abomey-Calavi, University of Abomey-Calavi, Benin

Res. J. Recent Sci., Volume 9, Issue (2), Pages 27-38, April,2 (2020)

Abstract

The altimetric requirements for projects with a strong vertical component are numerous and urgent. These needs can not be properly realized without the control of both this vertical component and the instruments used for its determination. The present study proposes to answer the fundamental question of how to achieve a leveling of an acceptable precision in accordance with the aspirations of the specifications using conventional tools and a GPS receiver. The results obtained point out that the accuracy of the altimetric data depends on the type of apparatus used and this in a good state of operation. Similarly, the results show that it is the technical tolerance and accuracy of the altimetry meters that lead to the choice of equipment and procedure to respond promptly to the Terms of Reference (TOR) in the execution of an altimetric survey operation. Finally, the same results showed us that for a precision leveling, are highly recommended for the impressive quality of accuracy they present, the SL10 digital level, the GPS-CHC and the engineering level. As for the total station and the Trimble R7-R8 GPS they are recommended under the best conditions of their use for ordinary leveling. In the case of this study, a model test was determined by the geometric leveling and GPS positioning method, which consisted of directly exploiting the ripple of the study area.

References

  1. Legros M. (2013)., Methods of work in GNSS networks., GéoPos CNIG Geopositioning Commission, 39-40.
  2. Henry J.B. (2005)., Course of Topography and General Topometry., Louis Pasteur University of Strasbourg, France, 65p.
  3. Durand S. (2003)., Improvement of the accuracy of the real-time differential localization by phase measurement of the GNSS system: a detailed study of the observation equations and the problem of solving entire ambiguities., 230.
  4. Republic of Benin (2009)., Order No. 0068 / MUHRFLEC / DC / SGM / IGN / DGURF / SA laying down the standards and specifications applicable to cartographic and topographical work in the Republic of Benin.,
  5. Legifrance Order of September (2003)., Relating to the class of clarifications applicable to the categories of topographic works carried out by the State and the local authorities and their public establishments or carried out on their behalf in France., https://www.legifrance.gouv.fr/eli/ arrete/2003/9/16/EQUP0300864A/jo/texte, accessed on 17/07/2018 at 11 am.
  6. Da Morou (2017)., Implementation of a geoid model on the city of Cotonou., southern Benin, 83.
  7. Duquenne H. (2005)., The geoid and the local methods of its determination, Francophone School on the geoid.,
  8. Duquenne H. (2002)., Altimetric conversion process applicable in France., (The GPS and the civil engineering trades - Proceedings of the scientific days of LCPC), 10.
  9. Pavlis N.K., Holmes S.A., Kenyon S.C. and Factor J.K. (2012)., The Development and Evaluation of the Earth Gravitational Model 2008 (EGM2008)., Journal of Geophysical Research: Solid Earth, (1978-2012), 117. April 2012.
  10. Kiki A.S. (2008)., Contribution of GPS / GNSS technology to land tenure security in Benin, end of training memory of the second cycle for obtaining a geometer-topographer design engineer diploma., Polytechnic School of Abomey-Calavi, 217.
  11. Romieu C. (2016)., Geoid Model Technical Note., 12.
  12. Degbegnon L. (2007)., Geodesy Course for Engineers Land surveyors., EPAC / UAC Benin.
  13. Mevo-Guezo C. (2013)., Studies on the densification of permanent GPS stations in Benin., 63.
  14. Surveys and Mapping Branch (1978)., Specifications for control surveys and advice on building landmarks., Energy, Mines and Resources Canada, Ottawa, Ontario.
  15. Geodetic Survey Division (1992)., Guidelines and Specifications for Global Positioning System (GPS) Surveys., Canadian Survey Center, Surveys, Mapping and Remote Sensing Sector, Energy, Mines and Resources Canada, Ottawa.
  16. IGN-Benin, December (1997)., Geodesic Network of Benin, Directory of 1st order geodetic points (Campaign 19951997).,
  17. Langley R.B. (1991)., The mathematics of GPS., GPS world, 2(7), 45-50.