Análise comparativa de Modelos Digitais de Elevação

Information on the topography is of great importance for the planning and execution of engineering works. The Digital Elevation Models represent an important source of data on the physiographic features of the terrain (natural or human-induced), and its applications cover various types of studies and knowledge areas. Moreover, the DEMs are also fundamental in models of geometric correction and orthorectification of images of Remote Sensing. The representations of relief from the altimetry data are conventionally obtained through topographic or directly by aerophotogrammetric restitution. In most cases requires the arduous task of digitizing the contour lines and elevation points for the generation of DEM's in mapping physiographic relief. The opportunity to easily get the DEM significantly reduces the burden of building these mappings. Given the above, the objective is to compare the potential of DEM's obtained from different sensors in the characterization of the relief Macaparana County, located in the Zona da Mata Norte de Pernambuco.Pages: 2324-233