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Comparison of basin morphometry derived from topographic maps, ASTER and SRTM DEMs: an example from Kerala, India / Jobin Thomas in Geocarto international, vol 30 n° 3 - 4 (March - April 2015)  

Public [article]  inGeocarto international > vol 30 n° 3 - 4 (March - April 2015) . - pp 346 - 364 Titre : Comparison of basin morphometry derived from topographic maps, ASTER and SRTM DEMs: an example from Kerala, India Type de document : Article/Communication Auteurs : Jobin Thomas, Auteur ; V. Prasannakumar, Auteur Année de publication : 2015 Article en page(s) : pp 346 - 364 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques [Termes IGN] bassin hydrographique [Termes IGN] drainage [Termes IGN] image SRTM [Termes IGN] image Terra-ASTER [Termes IGN] modèle numérique de terrain Résumé : (Auteur) The drainage network of a sixth-order tropical river basin, viz. Ithikkara river basin, was extracted from different sources such as Survey of India topographic maps (1: 50,000; TOPO) and digital elevation data of Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) (30 m) and Shuttle Radar Topography Mapping Mission (SRTM) (90 m). Basin morphometric attributes were estimated to evaluate the accuracy of the digital elevation model (DEM)-derived drainage networks for hydrologic applications as well as terrain characterization. The stream networks derived from ASTER and SRTM DEMs show significant agreement (with slight overestimation of lower order streams) with that of TOPO. The study suggests that SRTM (despite the coarser spatial resolution) provides better results, in drainage delineation and basin morphometry, compared to ASTER. Further, the variability of basin morphometry among the data sources might be attributed to spatial variation of elevation, raster grid size and vertical accuracy of the DEMs as well as incapability of the surface hydrologic analysis functions in the GIS platform. Numéro de notice : A2015-250 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/10106049.2014.955063 Date de publication en ligne : 08/09/2014 En ligne : https://doi.org/10.1080/10106049.2014.955063 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=76248 [article]

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