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Built-up and vegetation extraction and density mapping using WorldView-II / A. Kumar in Geocarto international, vol 27 n° 7 (November 2012)  

Public [article]  inGeocarto international > vol 27 n° 7 (November 2012) . - pp 557 - 568 Titre : Built-up and vegetation extraction and density mapping using WorldView-II Type de document : Article/Communication Auteurs : A. Kumar, Auteur ; A. Chandra Pandrey, Auteur ; A. Jeyaseelan, Auteur Année de publication : 2012 Article en page(s) : pp 557 - 568 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] analyse en composantes principales [Termes IGN] bande infrarouge [Termes IGN] bande rouge [Termes IGN] carte d'occupation du sol [Termes IGN] densité de population [Termes IGN] détection du bâti [Termes IGN] extraction de la végétation [Termes IGN] image Worldview [Termes IGN] Normalized Difference Vegetation Index Résumé : (Auteur) This study demonstrates the use of high resolution WorldView-II satellite data in extraction of built-up land and vegetation using normalized index techniques. The PCA 1 and NIR 2 bands-based built-up index was proposed for extracting built-up land, which exhibit high accuracy. The normalized difference vegetation index based on Red Edge and NIR 2 bands of WorldView-II produced high accuracy in the estimation of vegetation compared to the use of Red and NIR bands. The grid technique used in estimating built-up and vegetation density from precisely classified images provided better and accurate assessment of built-up and vegetation density in heterogeneous landscape of urban areas. This shows areas of very high to high built-up density are located in the central, western and southern parts, which are primarily devoid of vegetation. This study indicates possibilities of utilizing high resolution satellite data in urban landscape characterization using a grid-based technique. Numéro de notice : A2012-542 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/10106049.2012.657695 Date de publication en ligne : 23/02/2012 En ligne : https://doi.org/10.1080/10106049.2012.657695 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31988 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
059-2012071	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Application of remote sensing and geographic information system in change detection of the Netravati and Gurpur river channels, Karnataka, India / A. Kumar in Geocarto international, vol 25 n° 5 (August 2010)  

Public [article]  inGeocarto international > vol 25 n° 5 (August 2010) . - pp 397 - 425 Titre : Application of remote sensing and geographic information system in change detection of the Netravati and Gurpur river channels, Karnataka, India Type de document : Article/Communication Auteurs : A. Kumar, Auteur ; K. Jayappa, Auteur ; B. Deepika, Auteur Année de publication : 2010 Article en page(s) : pp 397 - 425 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] cours d'eau [Termes IGN] détection de changement [Termes IGN] image IRS-LISS [Termes IGN] Inde [Termes IGN] séisme [Termes IGN] système d'information géographique [Termes IGN] tectonique Résumé : (Auteur) The Netravati and Gurpur (N-G) river basins are tectonically active due to a number of seismically active faults/lineaments and their proximity to Mulki-Pulicat Lake axis. The gradient of the river channels has gradually reduced (after ?10 km from their origin) and has forced the rivers to flow slowly in meandering and zigzag paths. The nature and intensity of meanders are governed by geological and tectonic conditions of the river basins. Significant changes in river channels, between the years 1910 and 2005, have been detected in three blocks - Block-I (Netravati) and Blocks-II and III (Gurpur) - and studied in detail by comparing topographic maps with Indian Remote Sensing Satellite, LISS-III images through GIS techniques. The block-wise qualitative and quantitative changes of these channels indicate that they are narrowed and migrate towards south due to neotectonic activities, formation of braided islands, variation in flow intensity and anthropogenic interventions like construction of vented dams and sand mining. Numéro de notice : A2010-312 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/10106049.2010.496004 Date de publication en ligne : 07/07/2010 En ligne : https://doi.org/10.1080/10106049.2010.496004 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30506 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
059-2010051	RAB	Revue	Centre de documentation	En réserve L003	Disponible