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Creation of the Gravimetric Network and Determination of the GEOÏD in the Mediterranean Basin (Region-Tunisia)
Department de Geology, Faculty of Sciences University of El Manar, Tunis, Tunisie
Department of Geography and GIS, Faculty of Arts and Humanities, King Abdulaziz University, Jeddah, KSA
- 1 Department de Geology, Faculty of Sciences University of El Manar, Tunis, Tunisie
- 2 Department of Geography and GIS, Faculty of Arts and Humanities, King Abdulaziz University, Jeddah, KSA
Journal of Geographic Information System·Volume 12 (2020)·Pages 159–177·Published 8 June 2020·DOI10.4236/jgis.2020.123010
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Abstract
The determination of geoid models with great precision (centimeter) was always at the center of interest in geodesy research [ 1 ] [ 2 ]. One of the most used methods to calculate the geoid model is the method called Remove-Compute-Restore (R-C-R). This method applies the stokes’ integral formula by the use of short, medium and long wavelength information via the three main stages R-C-R. The GravSoft software implemented by [ 3 ] was used for this study. Geodetic heights, a digital terrain model (SRTM) and leveled GPS points were used as inputs. The geoid modeling was carried out on the North region of Tunisia (Grand Tunis and Bizerte) on an area of 83 × 83 km. The accuracy of the quasi-geoid provisional reached 3.1 cm.
KeywordsGravimetric NetworkGeoidGeodesyGrand TunisBizerteStokes IntegralR-C-R Method
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