Avaliação comparativa do potencial do modelo digital de elevação do ASTER GDEM e das cartas topográficas do exército para estudo da altimetria na região de Renascença, Sudoeste do Paraná

Abstract

This paper assesses the potential of using a digital elevation model generated from data acquired by the ASTER GDEM to characterize measures altimetry relief of the city of Renaissance PR. This paper assesses the potential of using a digital elevation model generated from data acquired by the ASTER GDEM to characterize measures altimetry relief of the city of Renascença PR. The ASTER GDEM data were correlated with the products obtained from charts compiled by the Brazilian Army, aiming to analyze the degree of closeness between the two methods. The comparison of the results showed that there is a direct correlation, in an area of 20.96,96 ha, which represents 48.19% of the territory. The rest of the territory, or 51.81%, have no correspondence between the areas classified by two methods. If adopting an acceptance threshold of ± 50 m altitude, the correlation between the altitudes classes generated by the two methods, reaches a total of 38,986.65 hectares, representing 91.67% of the territory. Whereas, the ASTER GDEM used, had no checkpoints and rustic way, by which the letters were generated, can be concluded that the method used in this work has a good potential for the study of municipalities altimetry Southwest of Paraná. Therefore, through this study, it demonstrates that ASTER GDEM can be used to update maps covering different regions of Brazil, because if they are used control points can achieve good precision altimetric and planimetric the generation of topographic maps.