Abstract
We present an approach to identify some geomorphometrical characteristics of raster geo-images based on a Geographic Information System (GIS). The characteristic identification involves the generation of raster layers, topographic ruggedness and drainage density. In a sense, the topographic ruggedness is used to express the amount of elevation difference between adjacent cells of the Digital Elevation Model (DEM). Moreover, the topographic ruggedness is presented by means of a Terrain Ruggedness Index (TRI). We use the Spline Interpolation Method to obtain the density layers. These layers are used to represent the amount of geographic linear objects in a specific area. The algorithm has been implemented into GIS – ArcInfo, and applied for a GIS of Tamaulipas State, Mexico.
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