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Probabilistic landslide hazard mapping using GIS and remote sensing data at Boun, Korea / S. Lee in International Journal of Remote Sensing IJRS, vol 25 n° 11 (June 2004)  

Public [article]  inInternational Journal of Remote Sensing IJRS > vol 25 n° 11 (June 2004) . - pp 2037 - 2052 Titre : Probabilistic landslide hazard mapping using GIS and remote sensing data at Boun, Korea Type de document : Article/Communication Auteurs : S. Lee, Auteur ; J. Choi, Auteur ; K. Min, Auteur Année de publication : 2004 Article en page(s) : pp 2037 - 2052 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] base de données localisées [Termes IGN] cartographie des risques [Termes IGN] classification dirigée [Termes IGN] Corée [Termes IGN] données de terrain [Termes IGN] effondrement de terrain [Termes IGN] image IRS [Termes IGN] linéament [Termes IGN] lithologie [Termes IGN] occupation du sol [Termes IGN] photo-interprétation assistée par ordinateur [Termes IGN] photographie aérienne [Termes IGN] risque naturel [Termes IGN] système d'information géographique [Termes IGN] zone à risque Résumé : (Auteur) The aim of this study is to evaluate the hazard of landslides at Boun, Korea, using a Geographic Information System (GIS) and remote sensing. Landslide locations were identified in the Boun area from interpretation of aerial photographs and field surveys. The topographic, soil, forest, geologic, lineament and land cover data were collected, processed and constructed into a spatial database using GIS and remote sensing data. The factors that influence landslide occurrence, such as slope, aspect and curvature of the topography, were calculated from the topographic database. Texture, material, drainage and effective soil thickness were extracted from the soil database, and type, age, diameter and density of timber were extracted from the forest database. The lithology was extracted from the geological database and lineaments were detected from Indian Remote Sensing (IRS) satellite images. The land cover was classified based on the Landsat Thematic Mapper (TM) satellite image. Landslide hazard areas were analysed and mapped, using the landslide-occurrence factors, by the probability-likelihood ratio method. The results of the analysis were verified using actual landslide location data. The validation results showed satisfactory agreement between the hazard map and the existing data on landslide locations. Numéro de notice : A2004-226 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431160310001618734 En ligne : https://doi.org/10.1080/01431160310001618734 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26753 [article]

Exemplaires(1)

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080-04091	RAB	Revue	Centre de documentation	En réserve L003	Exclu du prêt

Noise over water surfaces in Landsat TM images / J.E. Nichol in International Journal of Remote Sensing IJRS, vol 25 n° 11 (June 2004)  

Public [article]  inInternational Journal of Remote Sensing IJRS > vol 25 n° 11 (June 2004) . - pp 2087 - 2094 Titre : Noise over water surfaces in Landsat TM images Type de document : Article/Communication Auteurs : J.E. Nichol, Auteur ; V. Vohora, Auteur Année de publication : 2004 Article en page(s) : pp 2087 - 2094 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique [Termes IGN] bande visible [Termes IGN] bruit (théorie du signal) [Termes IGN] filtrage du bruit [Termes IGN] image Landsat-TM [Termes IGN] qualité des eaux [Termes IGN] surface de l'eau Résumé : (Auteur) A coherent pattern of system noise observable on all visible wavebands of Landsat Thematic Mapper images over homogeneous surfaces such as waterbodies is regarded as serious enough to impair visual interpretation and affect image analysis results. The noise is removable using iterative median filtering in the spatial domain, which requires much less processing time than removal by frequency domain Fourier transform. The significance of the error introduced to the images by the noise is evaluated in terms of water quality parameters in the study area, and methods for removal of the noise are described. Numéro de notice : A2004-227 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431160310001618770 En ligne : https://doi.org/10.1080/01431160310001618770 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26754 [article]

Exemplaires(1)

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Analysis of simultaneous chlorophyll measurements by lidar fluorosensor, MODIS and SeaWiFS / R. Bardini in International Journal of Remote Sensing IJRS, vol 25 n° 11 (June 2004)  

Public [article]  inInternational Journal of Remote Sensing IJRS > vol 25 n° 11 (June 2004) . - pp 2095 - 2110 Titre : Analysis of simultaneous chlorophyll measurements by lidar fluorosensor, MODIS and SeaWiFS Type de document : Article/Communication Auteurs : R. Bardini, Auteur ; F. Colao, Auteur ; et al., Auteur Année de publication : 2004 Article en page(s) : pp 2095 - 2110 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s) [Termes IGN] analyse comparative [Termes IGN] chlorophylle [Termes IGN] données lidar [Termes IGN] image Aqua-MODIS [Termes IGN] image Seawifs [Termes IGN] océan [Termes IGN] performance Résumé : (Auteur) The ENEA (Italian Agency for New Technologies, Energy and the Environment) lidar fluorosensor (ELF), aboard the research vessel Italica, measured continuously surface chlorophyll-a concentrations during the Italy-New Zealand and New Zealand-Italy transects (13 November-18 December 2001 and 28 February-1 April 2002, respectively). The ELF measurements were compared with the data collected by the Sea-viewing Wide Field-of-view Sensor (SeaWiFS) and the Moderate Resolution Imaging Spectroradiometer (MODIS). This study pointed out advantages, disadvantages and possible synergies of lidar fluorosensor and spaceborne radiometers. In particular, the SeaWiFS and MODIS bio-optical algorithms have been calibrated with the ELF measurements. The differences between the performances of the two spaceborne radiometers are also briefly discussed. Numéro de notice : A2004-228 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431160310001618086 En ligne : https://doi.org/10.1080/01431160310001618086 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26755 [article]

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Analysis of four change detection algorithms in bi-temporal space with a case study / Y. Liu in International Journal of Remote Sensing IJRS, vol 25 n° 11 (June 2004)  

Public [article]  inInternational Journal of Remote Sensing IJRS > vol 25 n° 11 (June 2004) . - pp 2121 - 2139 Titre : Analysis of four change detection algorithms in bi-temporal space with a case study Type de document : Article/Communication Auteurs : Y. Liu, Auteur ; S. Nishiyama, Auteur ; et al., Auteur Année de publication : 2004 Article en page(s) : pp 2121 - 2139 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image [Termes IGN] analyse comparative [Termes IGN] analyse en composantes principales [Termes IGN] détection de changement [Termes IGN] régression Résumé : (Auteur) Although change detection algorithms for temporal remote sensing images have been compared using various datasets, there is no general agreement on their performance for separating change and no-change. This study compared image differencing, image ratioing, image regression, and principal component analysis (PCA) from a mathematical perspective. Error analysis showed that no-change pixels with errors are expected to be located within an error zone in bitemporal space. Bi-temporal space consists of two temporal axes of target pixel values observed successively. All algorithms confine a no-change area to a zone delineating change and no-change pixels in the space. Image ratioing defines a fan-like sector as a no-change area, generally unsuitable for change detection. The other algorithms confine a no-change area to a strip-like zone. Image differencing defines a no-change zone with a fixed slope, leading to its inability to specify flexibly the error zone that varies with different conditions. In the examined case, image regression and standardized PCA (SPCA) achieved the best performance for change detection, followed by PCA, image differencing, and image ratioing. Numéro de notice : A2004-229 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431160310001606647 En ligne : https://doi.org/10.1080/01431160310001606647 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26756 [article]

Exemplaires(1)

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080-04091	RAB	Revue	Centre de documentation	En réserve L003	Exclu du prêt

Examining the effect of spatial resolution and texture window size on classification accuracy: an urban environment case / D. Chen in International Journal of Remote Sensing IJRS, vol 25 n° 11 (June 2004)  

Public [article]  inInternational Journal of Remote Sensing IJRS > vol 25 n° 11 (June 2004) . - pp 2177 - 2092 Titre : Examining the effect of spatial resolution and texture window size on classification accuracy: an urban environment case Type de document : Article/Communication Auteurs : D. Chen, Auteur ; D.A. Stow, Auteur ; P. Gong, Auteur Année de publication : 2004 Article en page(s) : pp 2177 - 2092 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique [Termes IGN] analyse comparative [Termes IGN] classification par maximum de vraisemblance [Termes IGN] image multibande [Termes IGN] limite de résolution géométrique [Termes IGN] limite de résolution spectrale [Termes IGN] milieu urbain [Termes IGN] occupation du sol [Termes IGN] périphérie urbaine [Termes IGN] précision de la classification [Termes IGN] San Diego [Termes IGN] texture d'image Résumé : (Auteur) The purpose of this paper is to evaluate spatial resolution effects on image classification. Classification maps were generated with a maximum likelihood (ML) classifier applied to three multi-spectral bands and variance texture images. A total of eight urban land use/cover classes were obtained at six spatial resolution levels based on a series of aggregated Colour Infrared Digital Orthophoto Quarter Quadrangle (DOQQ) subsets in urban and rural fringe areas of the San Diego metropolitan area. The classification results were compared using overall and individual classification accuracies. Classification accuracies were shown to be influenced by image spatial resolution, window size used in texture extraction and differences in spatial structure within and between categories. The more heterogeneous arc the land use/cover units and the more fragmented are the landscapes, the finer the resolution required. Texture was more effective for improving the classification accuracy of land use classes at finer resolution levels. For spectrally homogeneous classes, a small window is preferable. But for spectrally heterogeneous classes, a large window size is required. Numéro de notice : A2004-230 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431160310001618464 En ligne : https://doi.org/10.1080/01431160310001618464 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26757 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
080-04091	RAB	Revue	Centre de documentation	En réserve L003	Exclu du prêt