| Journal: | Boletim de ciencias geodesicas |
| Database: | PERIÓDICA |
| System number: | 000458664 |
| ISSN: | 1413-4853 |
| Authors: | Santos, Afonso de Paula dos1 Medeiros, Nilcilene das Gracas1 Poz, Aluir Porfirio Dal2 Santos, Gerson Rodrigues dos3 Rodrigues, Dalto Domingos1 Emiliano, Paulo Cesar3 |
| Institutions: | 1Universidade Federal de Vicosa, Departamento de Engenharia Civil, Vicosa, Minas Gerais. Brasil 2Universidade Estadual Paulista "Julio de Mesquita Filho", Faculdade de Ciencia e Tecnologia, Presidente Prudente, Sao Paulo. Brasil 3Universidade Federal de Vicosa, Departamento de Estatistica, Vicosa, Minas Gerais. Brasil |
| Year: | 2020 |
| Volumen: | 26 |
| Number: | 2 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Analítico, descriptivo |
| English 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 |
| Disciplines: | Geociencias |
| Keyword: | Geodesia, Precisión posicional, DSM, DEM, Extracción de puntos homólogos, Calidad de datos espaciales |
| Keyword: | Geodesy, Positional accuracy, DSM, DEM, Homologous point extraction, Spatial data quality |
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