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Finding appropriate interpolation techniques for topographic surface generation for mudslide risk zonation / A. Vansarochana in Geocarto international, vol 24 n° 4 (August - September 2009)  

Public [article]  inGeocarto international > vol 24 n° 4 (August - September 2009) . - pp 313 - 332 Titre : Finding appropriate interpolation techniques for topographic surface generation for mudslide risk zonation Type de document : Article/Communication Auteurs : A. Vansarochana, Auteur ; N.K. Tripati, Auteur ; R. Clemente, Auteur Année de publication : 2009 Article en page(s) : pp 313 - 332 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique [Termes IGN] analyse comparative [Termes IGN] effondrement de terrain [Termes IGN] fonction spline d'interpolation [Termes IGN] image Landsat-ETM+ [Termes IGN] interpolation [Termes IGN] interpolation inversement proportionnelle à la distance [Termes IGN] krigeage [Termes IGN] modèle numérique de surface [Termes IGN] pente [Termes IGN] risque naturel Résumé : (Auteur) Mudslides and debris flows are now more common problems in tropical regions than landslides. This article addresses the issue of modelling mudslide-susceptible locations using an information value approach. Landsat 7 (ETM+) was employed to create a land-use map with limited field checks. Other parameters considered were lineament, road, soil, stream network and lithology. Topographic parameters such as slope and aspect play a dominant role in slope stability studies. Maps for slope and aspects were developed from a digital elevation model using statistical surface interpolation techniques. This article offers insight into the importance of the selection of suitable surface interpolation techniques. The three surface interpolation techniques evaluated in the study were: inverse distance weighted, Kriging and Spline. These were found to have varied accuracies of interpolation surfaces for all parameters, including elevation, slope and aspect. Surfaces offering the best accuracy were adopted for the information value approach for mudslide susceptibility zonation. Copyright Taylor & Francis Numéro de notice : A2009-306 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/10106040802556173 Date de publication en ligne : 23/07/2009 En ligne : https://doi.org/10.1080/10106040802556173 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29936 [article]

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