COMPARATIVE ANALYSIS OF THREE PLANE GEOMETRIC GEOID SURFACES FOR ORTHOMETRIC HEIGHT MODELLING IN KAMPALA, UGANDA

  • Bruno Kyamulesire Associated Mapping Professionals, P. O. Box 5309, Jinja, Uganda.
  • Paul Dare Oluyori P. D. Horvent Surveys Ltd, Abuja Nigeria
  • Sylvester Okiemute Eteje Eteje Surveys and Associates https://orcid.org/0000-0002-0578-2799
Keywords: Local Geoid, Modelling, Geometric Surface, Kampala, Orthometric Heights

Abstract

The conversion of theoretical, as well as geometric heights to practical heights requires the application of geoidal undulations from a geoid model. The various global geopotential models that are readily available for application in any part of the world do not best-fit regions, as well as countries. As a result, there is a need to determine the local geoid models of local areas, regions and countries. This study determines the local geoid model of Kampala in Uganda for orthometric heights computation by comparing three plane geometric geoid surfaces. A total of 19 points were used in the study. The least squares adjustment technique was applied to compute the models’ parameters. Microsoft Excel programs were developed for the application of the models in the study area. The Root Mean Square Index was applied to compute the accuracy of the models. The three geometric geoid models were compared using their accuracy to determine which of them is most suitable for application in the study area. The comparison results show that the three models can be applied in the study area with more reliability, with greater confidence in model 2.

Author Biography

Sylvester Okiemute Eteje, Eteje Surveys and Associates

A surveyor Registered by the Surveyors Council of Nigeria (SURCON) and a Doctor of Philosophy in Surveying and Geoinformatics with Research Interest in Geodesy and Geodynamics

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Published
2020-09-11
How to Cite
KyamulesireB., OluyoriP. D., & EtejeS. O. (2020). COMPARATIVE ANALYSIS OF THREE PLANE GEOMETRIC GEOID SURFACES FOR ORTHOMETRIC HEIGHT MODELLING IN KAMPALA, UGANDA. FUDMA JOURNAL OF SCIENCES, 4(3), 48 - 51. https://doi.org/10.33003/fjs-2020-0403-255