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A longitudinal study of malaria associated with deforestation in Sonitpur district of Assam, India / M. Nath in Geocarto international, vol 27 n° 1 (February 2012)  

Public [article]  inGeocarto international > vol 27 n° 1 (February 2012) . - pp 79 - 88 Titre : A longitudinal study of malaria associated with deforestation in Sonitpur district of Assam, India Type de document : Article/Communication Auteurs : M. Nath, Auteur ; A. Bora, Auteur ; P. Talukdar, Auteur ; et al., Auteur Année de publication : 2012 Article en page(s) : pp 79 - 88 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale [Termes IGN] analyse diachronique [Termes IGN] analyse spatio-temporelle [Termes IGN] couvert forestier [Termes IGN] déboisement [Termes IGN] épidémie [Termes IGN] forêt tropicale [Termes IGN] Himalaya [Termes IGN] image IRS [Termes IGN] Inde [Termes IGN] maladie parasitaire [Termes IGN] Normalized Difference Vegetation Index Résumé : (Auteur) Assam–Arunachal forest fringed foothill area is endemic for malaria incidence. The present study deals with the temporal analysis of malaria incidence and determines its association with deforestation in 24 villages along the Assam–Arunachal forest fringed foothill area of Sonitpur district of Assam. Malaria epidemiological survey has been carried out in the study area from the year 1994 to 2005. Remote sensing (RS) technique has been used to map the areas of forest changes from the year 2000 to 2005. Geographical information system (GIS) was used to map the malaria incidence and forest cover. The study villages are endemic to malaria infections and there was increasing trend of malaria incidence over the years. The slide positivity rate (SPR) ranged from 5.1% in 1997 to 44.4% in 2005. The percentage forest cover decreased significantly from 23.6% during 2000 to 15.4% during 2005, whereas SPR was increased during 2000–2005. The present study is the first attempt to understand the role of deforestation in malaria incidence using RS and GIS in the north-eastern region of India at a micro-geographic level. The study suggests that the area is endemic to malaria transmission. The decrease in forest cover is a serious ecological concern besides its role in elevating the malaria incidence in the study area. Numéro de notice : A2012-102 Affiliation des auteurs : non IGN Thématique : FORET/GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/10106049.2011.613485 Date de publication en ligne : 23/09/2011 En ligne : https://doi.org/10.1080/10106049.2011.613485 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31550 [article]

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Usefulness of synthetic aperture radar (SAR) interferometry for digital elevation model (DEM) generation and estimation of land surface displacement in Jharia coal field area / Atanu Bhattacharya in Geocarto international, vol 27 n° 1 (February 2012)  

Public [article]  inGeocarto international > vol 27 n° 1 (February 2012) . - pp 57 - 77 Titre : Usefulness of synthetic aperture radar (SAR) interferometry for digital elevation model (DEM) generation and estimation of land surface displacement in Jharia coal field area Type de document : Article/Communication Auteurs : Atanu Bhattacharya, Auteur ; M. Arora, Auteur ; M. Sharma, Auteur Année de publication : 2012 Article en page(s) : pp 57 - 77 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image radar et applications [Termes IGN] appariement de formes [Termes IGN] effondrement de terrain [Termes IGN] image radar moirée [Termes IGN] Inde [Termes IGN] interferométrie différentielle [Termes IGN] interféromètrie par radar à antenne synthétique [Termes IGN] mine de charbon [Termes IGN] modèle numérique de surface [Termes IGN] mouvement de terrain Résumé : (Auteur) Land surface displacement is a phenomenon of ground movement, which may occur due to various reasons including unplanned mining. The quantification of land surface displacement through conventional field surveys is based on sparingly distributed point data, which may be insufficient for many applications. A detailed spatial and temporal monitoring of land surface displacements through remote sensing-based synthetic aperture radar (SAR) interferometry may be valuable. Over the last two decades, differential SAR interferometry (DInSAR) has been effectively used globally for the estimation of spatial land surface displacements caused due to natural and man-made hazards. However, it has not gained momentum in India, where occurrences of natural and man-made hazards are a common phenomenon. In this article, preliminary results from DInSAR to measure land surface displacement in Jharia coal fields have been presented. DInSAR results effectively identified the land surface displacement due to several mining activities in the region during a one-month period. Numéro de notice : A2012-103 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/10106049.2011.614358 Date de publication en ligne : 26/10/2011 En ligne : https://doi.org/10.1080/10106049.2011.614358 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31551 [article]

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An edge-oriented approach to thematic map error assessment / S. Sweeney in Geocarto international, vol 27 n° 1 (February 2012)  

Public [article]  inGeocarto international > vol 27 n° 1 (February 2012) . - pp 31 - 56 Titre : An edge-oriented approach to thematic map error assessment Type de document : Article/Communication Auteurs : S. Sweeney, Auteur ; T. Evans, Auteur Année de publication : 2012 Article en page(s) : pp 31 - 56 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique [Termes IGN] contour [Termes IGN] erreur de classification [Termes IGN] image Landsat-TM [Termes IGN] Indianapolis [Termes IGN] occupation du sol [Termes IGN] pixel [Termes IGN] précision de la classification Résumé : (Auteur) The objective of this analysis is to develop a method of classification error assessment that can contribute to techniques designed to evaluate change products with an emphasis on edge locations in landscapes. Reference land-cover data were developed within 10 randomly sampled regions across the study site, approximately 9 km2 each. Sample pixels were partitioned and allocated among two domain categories, interior and edge. The assignment of pixels to domain categories was based on neighbourhood heterogeneity. Classification error was assessed within domain categories on a pixel-by-pixel basis, evaluating agreement between map values and majority land cover. To demonstrate the methodology, we present summary results for this technique applied to a land-cover classification of south-central Indiana. Omission error was less than 8.3% within interior domains and from 25.8% to 36.4% in the edge. Commission error was below 26.7% within the interior domains and ranged from 13.9 to 74.6% in the edge domains. Numéro de notice : A2012-104 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/10106049.2011.622052 Date de publication en ligne : 20/10/2011 En ligne : https://doi.org/10.1080/10106049.2011.622052 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31552 [article]

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