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Abstract


DEVISING MAPS OF THE TERRAIN FEATURES OF CHAMCHAMAL DISTRICT USING THE DATA OF THE DIGITAL ELEVATION MODEL (DEM) AND SPATIAL ANALYSIS PACKAGE IN THE GIS PROGRAM
The study aimed at devising maps to representation of the topographical features of the Chamchamal district, in terms of contour maps, slope , aspect , shadow and curvature. The research depending on the digital elevation model DEM with a spatial precision of 30 m and programming for spatial analysis in geographic information systems represented by surface analysis The research showed the spatial variation in the natural features of the terrain, as contour maps showed the variation in the surface height, which is represented by the heights of the highlands and mountainous regions along the eastern and northwestern sections, whose height values ranged Between 400-1800 m. As for the slope map and the sides of the slope, the research showed the difference in the slope of the surface, as it described the diversity of manifestations of the slope in it between the sloping lands in the middle sections to the steep slopes in the eastern and northwestern sections of it, while the general direction of the slope was represented by its extension from The North-East to the South-West showed maps related to shadows of the surface of the earth that they were identical to the results of the contouring map, as the eastern and northwestern sections were distinguished by the fact that they received a greater amount of solar radiation while the neighboring regions were the least sections due to their occurrence under For the highlands, the maps related to the representation of curvature or curvature on the surface of the slopes, the maps showed a difference in terms of convex and concave areas, especially in the eastern and northwestern areas, while the direction of the slopes was regular in the central sections of the district, especially those that are near waterways, as well as The research reached a set of results and recommendations, including data provided that could be of assistance to assist the relevant authorities

Keywords
Maps, Terrain, Digital, Elevation Model (DEM), spatial analysis, geographical information system.


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