الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Digital Terrain Madel DTM is simply a statistical representation of the continuous surface of the ground by a large number of selected points with known X,Y,Z coordinates in an arbitrary co-ordinate field. The concept of creating digital models of the terrain has been one of the continuous growths over the last 30 years as a result of spectacular advances in computer graphics and imaging technology, and parallel developments in the used software. At the same time, due to the development of data sources and techniques of DEM creation.
The main objectives of the current research are to investigate the terrain classification, to analyze different interpolation techniques at different terrain tyoes and to create a DEM for sinai.
The basics of DEM were explained, this will lead to a better understanding of the mechanics of such models and encourage DEM users to take a more active interest in how they operate, and to improve their quality and reliability.
Sinai peninsula was selected as study area, the data were obtained from manual digitizing for 36- topographic maps, scale 1:100000 with contour interval 20m, after reviewing, filtering and cheking data, investigations of the most suitable criteria for terrain classification were done.Then, the different methods of interpolation techniques were tested with different gird size for the three-terrain type.The obtained data is about 940.624 points.its elevations varied from zero to 2639m with mean elevation 435m and the average intensity is 15.54 Km2.
Agird -based DEM for sinai were developed using surfer7 software beside some auxiliary computer programs designed by author.
Furthermore, some applications of DEM such as contour maps, relief maps, 3D viewing and surface area estimation are demonstrated.
After analyzing the obtained results, valuble and important conclusions and recommendations were obtained.