We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Precisão do modelo digital de elevação (SRTM-Topodata) com base em dados de projetos de aproveitamentos hidrelétricos.
- Authors
de CAMPOS, Marcel Medinas; de PAES, Rafael Pedrollo; de Carvalho Bonilha SILVA, Ana Rubia; FANTIN-CRUZ, Ibraim
- Abstract
The altimetry accuracy measurements of the Digital Elevation Model - DEM have been the subject of several studies. This accuracy plays an important role on information extracted from these data. In this context, this study compares data observed in designs of hydroelectric power plants with data extracted from the DEM. The comparison between the altimetry of data extracted from the DEM with those contained in the Basic Environmental Project - BEP of these facilities, assumed as the true information, was done with the purpose of analyzing the error of the information extracted from the DEM in relation to the data contained in the BEP and thus verifying the confidence in this type of estimate. The error and the coefficient of determination between the dam height (determined based on the DEM) and the dam height presented in the BEP were calculated. Moreover, a river cross section published in the BEP was contrasted with the same cross section extracted from the DEM. The mean relative error and the coefficient of determination between the five heights (estimated and projected) was 11% and 0.874, respectively. The coefficient of determination, mean square error and mean error between sections were 0.98, 1.56 and -0,02, respectively. The analysis evidenced that there are errors in relation to the information extracted from the DEM. However, considering the scale used in this study, the errors were smaller than those observed in the literature.
- Publication
Nativa, 2019, Vol 7, Issue 2, p184
- ISSN
2318-7670
- Publication type
Article
- DOI
10.31413/nativa.v7i2.6356