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Assessing image processing techniques for geological mapping: a case study in Eljufra, Libya / N.M. Saadi in Geocarto international, vol 24 n° 3 (June - July 2009)  

Public [article]  inGeocarto international > vol 24 n° 3 (June - July 2009) . - pp 241 - 253 Titre : Assessing image processing techniques for geological mapping: a case study in Eljufra, Libya Type de document : Article/Communication Auteurs : N.M. Saadi, Auteur ; K. Watanabe, Auteur Année de publication : 2009 Article en page(s) : pp 241 - 253 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] carte géologique [Termes IGN] fusion d'images [Termes IGN] géologie locale [Termes IGN] image ERS-SAR [Termes IGN] image Landsat-ETM+ [Termes IGN] linéament [Termes IGN] lithologie [Termes IGN] MNS SRTM [Termes IGN] réponse spectrale [Termes IGN] tectonique des plaques [Termes IGN] traitement d'image [Termes IGN] zone aride Résumé : (Auteur) Various image processing techniques were experimented with in this study to evaluate their efficiency for geological mapping in the Eljufra area of northwest Libya. Remote sensing data including multi-spectral optical Landsat Enhanced Thematic Mapper (ETM+), Synthetic Aperture Radar (ERS-2 SAR) and Digital Elevation Models (DEMs) extracted from the Shuttle Radar Topography Mission (SRTM) data were used to trace different lithological units as well as extracting geological lineaments in the study area. The study area is located in an arid environment mostly devoid of any vegetation. Most lithological and structural units are distinguishable based on their topographic form and spectral properties. Fusion of ETM+ and ERS-2 images was experimented with to further identify lithological units. Shaded relief techniques were implemented to enhance terrain perspective views and to extract geological lineaments. The results discriminated different rock units and modified formation boundaries and revealed new geological lineaments. Nine rock units were identified and plotted in the new geological map defined by the new boundaries. The dominant lineaments tend to run in the NNW-SSE and NNE-SSW directions. Analysis and interpretation of the lineaments provided information about the tectonic evolution of the study area. Copyright Taylor & Francis Numéro de notice : A2009-187 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/10106040802556199 Date de publication en ligne : 19/05/2009 En ligne : https://doi.org/10.1080/10106040802556199 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29817 [article]

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