Análise da diferença entre dados altimétricos em uma bacia hidrográfica através da comparação entre modelos digitais de elevação.

Moreira Braz, Adalto; Vieira Xavier, Fernanda; Mirandola Garcia, Patricia Helena

The utilization of Digital Elevation Models (DEM) got from orbitals sensors is an alternative to overcome the mapping deficiency in the most diverse segments of studies. On the possibility to relief study, an important factor that favored the inclusion of the same in the identification and terrestrial systems analysis comes from recent topographic data collected by remote sensing techniques. Topographic data of the Ribeirãozinho hydrographic basin stream (RHBS) were spatialized aiming at identifying differences in altimetry data and analyze their quality, from SRTM images (C and X band), TOPODATA and ASTER GDEM. Through the application of geoprocessing and statistic analysisit was used Tukey test, which consisted on comparing and define the smallest significant difference between values, evaluating the difference in topography of the terrain generated from the use of one of the DEM distributed free of charge. Besides that, sought to point out the best instrument for applications related to the proposal presented here.

DIGITAL elevation models; REMOTE sensing; TUKEY'S test

Revista Ateliê Geográfico, 2018, Vol 12, Issue 1, p71

1982-1956

Academic Journal

10.5216/ag.v12i1.41467