Processing obtained from the regional DTM with an elementary cell of 40 meters, which provides a three-dimensional representation of the ground through the simulation of the illumination of the Earth’s surface by a light source, ideally identified with the sun.This processing was obtained using the hillshade tool of the ArcGis 9.2 software, setting the azimuth of the light source to 315 degrees, the altitude of the light source at 45 degrees, and a factor of exaggeration of the light-shade effect equal to 5.
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