Zuleide Alves Ferreira
@ifto.edu.br
Teacher/Researcher/Geomatics
Instituto Federal de Educação, Ciência e Tecnologia do Tocantinst
Zuleide Ferreira is a teacher at the Federal Institute of Education, Science and Technology of Tocantins. She is also a PhD candidate in Information Management (Geographic Information System) at Nova IMS (Lisbon-PT).
RESEARCH, TEACHING, or OTHER INTERESTS
Earth and Planetary Sciences, Multidisciplinary
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Zuleide Ferreira, Ana Cristina Costa, and Pedro Cabral
Informa UK Limited
Zuleide Alves Ferreira and Pedro Cabral
MDPI AG
Digital elevation models (DEMs) provide important support to research since these data are freely available for almost all areas of the terrestrial surface. Thus, it is important to assess their accuracy for correct applicability regarding the correct use scale. Therefore, this paper aims to assess the vertical accuracy of ALOS PALSAR, GMTED2010, SRTM, and Topodata DEMs according to the Brazilian Cartographic Accuracy Standard through the official high accuracy network data of the Brazilian Geodetic System. This study also seeks to investigate whether the altimetric error is correlated with altitude and slope in the study area. Our results showed that the four assessed DEMs in this study demonstrated satisfactory accuracy to provide mappings in scales up to 1:100,000 because more than 90% of the extracted points presented altimetric errors of less than 25 m when compared with the reference points from the high accuracy network of the Brazilian Geodetic System. Regarding the altimetric error, we could not find a significant correlation with altitude or slope in the study area. In this sense, future DEMs assessments should be based on the investigation of other factors that may influence altimetric error.