Please use this identifier to cite or link to this item: http://repositorio.ufla.br/jspui/handle/1/48619
Title: Methodology for the extraction of homologous points from a DEM/DSM to evaluate the relative positional accuracy
Keywords: Positional accuracy
Homologous point extraction
Spatial data quality
Precisão posicional
Extração de ponto homólogo
Qualidade de dados espaciais
Issue Date: 2020
Publisher: Universidade Federal do Paraná
Citation: SANTOS, A. de P. dos et al. Methodology for the extraction of homologous points from a DEM/DSM to evaluate the relative positional accuracy. Boletim de Ciências Geodésicas, Curitiba, v. 26, n. 2, e2020007, 2020. DOI: 10.1590/s1982-21702020000200007 .
Abstract: This work presents a new methodology for extracting 3D homologous points from a DEM/DSM for relative evaluation of positional accuracies, from terrain features such as ridgelines and hydrography. Firstly, it extracts 3D intersection points between the linear features and then it performs a selection of these homologous points. A discussion regarding the spatial resolution effect of the DEM/DSM on the proposed methodology is carried out. As case study, the planimetric and altimetric positional accuracies evaluation of SRTM (X-band) and Aster GDEM (version 2) DSMs was conducted using, as reference, a DSM obtained via photogrammetry. The SRTM and Aster GDEM (version 2) DSMs showed similar classifications, that is, Class A for the altimetry and Class B for the planimetry at the 1:100,000 scale, according to the Brazilian technical standard of positional accuracy.
URI: http://repositorio.ufla.br/jspui/handle/1/48619
Appears in Collections:DEX - Artigos publicados em periódicos



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