Accuracy assessment of ASTER and SRTM DEMs: A case study in Andean Patagonia
The ASTER global digital elevation model (GDEM) and the SRTM-C digital elevation model (DEM) provide nearly global coverage, with spatial resolutions of 30 and 90 m, respectively. We assessed the geolocation, elevation, and morphological accuracy of the SRTM-C, the ASTER GDEM, and two single-scene D...
| Autores: | , , , |
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| Tipo de documento: | artigo |
| Estado: | Versão publicada |
| Data de publicação: | 2012 |
| País: | Argentina |
| Recursos: | Consejo Nacional de Investigaciones Científicas y Técnicas |
| Repositório: | CONICET Digital (CONICET) |
| Idioma: | inglês |
| OAI Identifier: | oai:ri.conicet.gov.ar:11336/195079 |
| Acesso em linha: | http://hdl.handle.net/11336/195079 |
| Access Level: | Acceso aberto |
| Palavra-chave: | ACCURACY ASSESSMENT DEM https://purl.org/becyt/ford/2.11 https://purl.org/becyt/ford/2 |
| Resumo: | The ASTER global digital elevation model (GDEM) and the SRTM-C digital elevation model (DEM) provide nearly global coverage, with spatial resolutions of 30 and 90 m, respectively. We assessed the geolocation, elevation, and morphological accuracy of the SRTM-C, the ASTER GDEM, and two single-scene DEMs derived from ASTER data for a site in Patagonia (ASTER DEMs). We found systematic and widely dispersed geolocation errors for the SRTM-C (Linear RMSE = 85.0 m) and the ASTER GDEM (Linear RMSE = 101.1 m). The SRTM-C had a narrow elevation error distribution (RMSE 8.3 ± 2.9 m), whereas the ASTER GDEM had a smaller RMSE (9.4 ± 2.3 m) than the analyzed ASTER DEMs. The ASTER DEMs provided more detailed morphological information than the SRTM-C, but also had more noise. |
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