الفهرس 
AbstractOnly 14 pages are availabe for public view
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Abstract
According to wide spread use of satellite based positioning techniques, especially GPS (Global Positioning System), a greater attention has started to be paid to precise determination of geoid models with an aim to replace the geometric leveling measurements with GPS measurements during geodetic and surveying works. This research discusses methodology used in the construction of a Egyptian local geoid with high accuracy, numerical solution of geoid modeling determination applying surface fitting; polynomial, least square collocation and minimum curvature surface (MCS) are presented for deriving the system of linear equations from boundary integral equation. In addition a comparative study of these three popular interpolation techniques, mainly it is going to emphasize the applicability of interpolation techniques as a tool for modeling the geoid in a local area precisely using GPS/Leveling data to serve practical applications of geodesy. Also, the obtained results revealed that, the applicability of MCS technique as a tool for determining the precise local geoid in Egypt with law distortion at common points.