Re-Establishment and Maintenance of Geodetic Networks in Parts of Oyo State Using Modern Techniques

Authors(3) :-Ikharo I. Blessing, Matthew N. Ono, Olaniyi Saheed S.

Oyo state like most of the other states in the Nigeria has an old and conventional Geodetic Network. This network was established and computed using the conventional method of position determination and the science of navigation in the 1930- 1950's which is based on the 30th arc-meridian of the Clarke 1880 modified ellipsoid with its origin at L40 Minna datum. This does not satisfy the overgrowing mapping requirements of the state and as well as other Geo-related information requirements. The required data were acquired with GNSS receivers set up on each of the existing points in static mode. The reference network that was re- established consists of eight (8) primary points, covering an area of approximately ?12km?^2 with an average separation of about 7Km. The new network monuments are made of reinforced concrete, solidly cemented in the ground with metal caps (brass markers), and coordinated using the static carrier phase differential GPS measurement. Several observation sessions were conducted and processed to compute 3D coordinates for the network. Post processed data were rigorously adjusted using Least Squares and must meet the distance accuracy specifications for a first order network (1:100,000). Final coordinates are based on WGS84 frame/ ITRF 2008 datum and are within a mean accuracy of ±0. 05m. Finally, the plots of the re-established control points were presented and thus re-established a reliable first order geodetic reference network within Oyo state. Based on the findings the study recommends all geodetic networks in Nigeria should be re- established.

Authors and Affiliations

Ikharo I. Blessing
Nnamdi Azikiwe University, Awka Anambra State, Nigeria
Matthew N. Ono
Nnamdi Azikiwe University, Awka Anambra State, Nigeria
Olaniyi Saheed S.
Nnamdi Azikiwe University, Awka Anambra State, Nigeria

Geodetic, GPS, GNSS, Least Squares Adjustment, Oyo, Mapping

  1. I. A. Fotiou, “Parametric Optimization and Optimal Control Using Algebraic Geometry Methods” Int. J Control. 2006, 79(11) pp1340-1358.
  2. G. Retscher, “Accuracy Performance of Virtual Reference Station (VRS) Networks”Positioning 2002, 1(03) pp 94.
  3. M. M. Lonchay, “ Precision of SatelliteP positioning and the Impact of Satellite Geomtric. University of Leige, Faculty of Science Department of Geograpghy, Geomatics Unit (ODISSEA) 2009.
  4. B. M. Ameh, “Determination of Components of Deflection of the Vertical of Lobi Area of Makurdi, Benue State, Using GPS (GNSS) and Precise Levelling Observations,” Unpublished M.S.C. Thesis of the Department of Surveying and Geo-informatics, Nnamdi Azikiwe University Awka (2013).
  5. C. S. Bundoo, “Establishing a Geodetic Reference Network in Montserrado County Liberia, Using GNSS Technology”. Unpublished M.Sc thesis, Kwame Nkurmah University of Science and Technology (KNUST), Kumasi, Ghana. Master Abstract International, 2013.
  6. www.researchgate.net, 2018
  7. FGCC, “Geospatial Positioning Accuracy Standards”. Federal Geodetic Control, FGDC-STD-007.1-1998, Federal Geographic Data Committee Secretariat, 1998.
  8. USACE, “Engineering and Design: Survey Markers and Monumentation”. US Army Corps of Engineers, EM1110-1-1002. 01103/2012. Accessed on 23April 2018 from www.publications. Usacearmy.mil/portals/76/ manual no 1110-1-1002, 2012.
  9. C. D. Ghilani and P. R. Wolf, “Elementary Surveying. An Introduction to Geomatics”, Twelfth Edition Pearson Prentice Hall Pearson Education International, U.S.A. 2008 pp 278-442.
  10. P. A. Cross, “Advanced Least Squares Aapplied to Position Ffixing”. University of East, 1994
  11. M. Craymer, R. Ferland, R. Snay. “Realization and Unification of NAD83 in Canada and the US via the ITRF”, 2006, DOI: 10.1007/978-3-642-59745-9_20.
  12. R. Dach, U. Hugentobler, P. Fridez & M. Meindl, “Bernese GPS Software” Version 5.0. Bern: Astronomical Institute, University of Bern, 2007.
  13. R. F. Leandro, M. C. Santos, and R. B. Langley () "GAPS: the GPS Analysis and Positioning Software - A Brief Overview." Proceedings of the ION GNSS, 20th International Technical Meeting of the Satellite Division, Fort Worth, Texas, September 25-28, pp. 18007-1811, 2007.
  14. D. M. James, “Establishment of A New Geospatial Frame for Tanzania-TZRF1O”. Unpublished M.Sc thesis, University of New Brunswick Canada. Master Abstract International, 2009.

Publication Details

Published in : Volume 6 | Issue 4 | July-August 2019
Date of Publication : 2019-08-30
License:  This work is licensed under a Creative Commons Attribution 4.0 International License.
Page(s) : 167-183
Manuscript Number : IJSRST196435
Publisher : Technoscience Academy

Print ISSN : 2395-6011, Online ISSN : 2395-602X

Cite This Article :

Ikharo I. Blessing, Matthew N. Ono, Olaniyi Saheed S., " Re-Establishment and Maintenance of Geodetic Networks in Parts of Oyo State Using Modern Techniques", International Journal of Scientific Research in Science and Technology(IJSRST), Print ISSN : 2395-6011, Online ISSN : 2395-602X, Volume 6, Issue 4, pp.167-183, July-August-2019. Available at doi : https://doi.org/10.32628/IJSRST196435    
Journal URL : https://ijsrst.com/IJSRST196435
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  • D. M. James, “Establishment of A New Geospatial Frame for Tanzania-TZRF1O”. Unpublished M.Sc thesis, University of New Brunswick Canada. Master Abstract International, 2009.
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