Determination of geoid and transformation parameters by using GPS on the region of Kadinhani in Konya
Basciftci, Fuat ... [et al.]
As known, three dimensional position (3D) of a point on the earth can be obtained by GPS. It has emerged that ellipsoidal height of a point positioning by GPS as 3D position, is vertical distance measured along the plumb line between WGS84 ellipsoid and a point on the Earthhs surface, when alone vertical position of a point is examined. If orthometric height belonging to this point is known, the geoid undulation may be practically found by height difference between ellipsoidal and orthometric height. In other words, the geoid may be determined by using GPS/Levelling measurements. It has known that the classical geodetic networks (triangulation or trilateration networks) established by terrestrial methods are insufficient to contemporary requirements. To transform coordinates obtained by GPS to national coordinate system, triangulation or trilateration networkks coordinates of national system are used. So high accuracy obtained by GPS get lost a little. These results are dependent on accuracy of national coordinates on region worked. Thus results have different accuracy on the every region.
Event: XXIII International FIG Congress : Shaping the change
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