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Raster-network regionalization for watershed data processing / T.L. Whiteaker in International journal of geographical information science IJGIS, vol 21 n° 3-4 (march - april 2007)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 21 n° 3-4 (march - april 2007) . - pp 341 - 353 Titre : Raster-network regionalization for watershed data processing Type de document : Article/Communication Auteurs : T.L. Whiteaker, Auteur ; D.R. Maidment, Auteur ; H. Gopalan, Auteur ; et al., Auteur Année de publication : 2007 Article en page(s) : pp 341 - 353 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image [Termes IGN] ArcGIS [Termes IGN] bassin hydrographique [Termes IGN] données maillées [Termes IGN] modèle hydrographique [Termes IGN] régionalisation (segmentation) [Termes IGN] Rio Grande (fleuve) [Termes IGN] Texas (Etats-Unis) [Termes IGN] variable régionalisée Résumé : (Auteur) Difficulties exist in calculating watershed parameters from raster datasets over large regions because of the excessive computation time involved. A technique is presented which divides a large region into hydrologically distinct subregions, in each of which raster analyses are performed, in order to efficiently process large raster datasets. The results of raster analyses are stored as attributes on the resulting vector data. The vector data are then merged, and appropriate values accumulated to obtain regional parameter values for points of interest along the stream network. The technique, called Raster-Network Regionalization, uses the vector stream network as the backbone for the integration of subregions into a single region. A case study is presented which utilizes the technique to prepare geospatial inputs for the Water Rights Analysis Package simulation model. Numéro de notice : A2007-115 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1080/13658810600965255 En ligne : https://doi.org/10.1080/13658810600965255 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28478 [article]

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