Nowadays, elevation models have come to provide a wide range of applications in various areas, thus serving as the basis for many research and developmental studies. As the objective of elevation models is the construction of the earth surface, and earth surface consists of reliefs, the construction of elevation models would not conform to the earth’s nature without taking consideration of geomorphological conditions. On the other hand, as the elevation variable includes integrity and continuity, its changes are subject to direction and distance. Therefore, selecting the method for earth crust construction model by means of classical statistical methods is inaccurate. As a result, taking consideration of topographical conditions, earth statistical methods in interpolation, and elevation models modification methods is necessary in constructing elevation models.
KeyWord: DEM, DTM, DTD, DTED, Interpolation,TIN, Kriging, Spline, IDW, GIS, Variogram. Semivariogram.
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