A Note on Methods for Vertical Accuracy Assessment of DEMs
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| Autores: | , |
|---|---|
| 格式: | artículo original |
| Fecha de Publicación: | 2017 |
| 實物特徵: | This study investigates the vertical accuracy of a DEMs interpolated from 1:50,000 contours with universal kriging (UK) using DEMs interpolated from 1:10,000 contours as the independent source of higher accuracy following the geospatial accuracy standards proposed by the Federal Geographic Data Committee, FGDC, (1998). In accordance with the standards, the 1:10,000 contours do not qualify as well-defined points with known horizontal position and a high degree of accuracy that are easily visible and recoverable on the ground. Hence, DEMs are created from the 1:10,000 contours and used to check the vertical accuracy of the 1:50,000 DEMs with elevation errors, an RMSE and vertical accuracy measure calculated between the 1:10,000 and 1:50,000 DEMs. Other methods of vertical accuracy assessment for the 1:50,000 DEMs include a comparison of elevation ranges, visualization of error surfaces and latitudinal and longitudinal terrain profiles. |
| País: | Kérwá |
| 機構: | Universidad de Costa Rica |
| Repositorio: | Kérwá |
| 語言: | Inglés |
| OAI Identifier: | oai:kerwa.ucr.ac.cr:10669/83418 |
| 在線閱讀: | http://www.uel.br/revistas/uel/index.php/geografia/article/view/23423 https://hdl.handle.net/10669/83418 |
| Palabra clave: | DEMs Interpolation Topography Geospatial accuracy Vertical accuracy Costa Rica Interpolación Topografía Precisión geoespacial Precisión vertical Interpolação Exatidão geoespacial Precisão vertical |