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Landscape dynamics of the spread of sudden oak death / M. Kelly in Photogrammetric Engineering & Remote Sensing, PERS, vol 68 n° 10 (October 2002)
[article]
Titre : Landscape dynamics of the spread of sudden oak death Type de document : Article/Communication Auteurs : M. Kelly, Auteur ; Ross K. Meentemeyer, Auteur Année de publication : 2002 Article en page(s) : pp 1001 - 1009 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] analyse de groupement
[Termes IGN] Californie (Etats-Unis)
[Termes IGN] carte de la végétation
[Termes IGN] classification dirigée
[Termes IGN] classification non dirigée
[Termes IGN] distribution spatiale
[Termes IGN] dynamique spatiale
[Termes IGN] Fagus (genre)
[Termes IGN] forêt
[Termes IGN] image ADAR
[Termes IGN] image multibande
[Termes IGN] indice d'humidité
[Termes IGN] maladie phytosanitaire
[Termes IGN] modélisation spatiale
[Termes IGN] Normalized Difference Vegetation Index
[Termes IGN] simulation dynamiqueRésumé : (Auteur) Sudden Oak Death is caused by a newly discovered virulent pathogen (Phytophthora ramorum) that is killing thousands of native oak trees in California. We present a landscape-scale study on the spatio-temporal dynamics of oak mortality. Second-order spatial point-pattern analysis techniques (Ripley's K) were applied to the distribution of dead tree crowns (derived from high-resolution imagery) in Marin County, California to determine the existence and scale of mortality clustering in two years (2000 and 2001). Both years showed clustering patterns between 100 and 300 m. A classification tree model was developed to predict spatial patterns of risk for oak mortality based on several landscapescale variables. Proximity to forest edge was the most important explanatory factor, followed by topographic moisture index, proximity to trails, abundance of Umbellularia californica, and potential summer solar radiation. This research demonstrates the utility of integrating remotely sensed imagery analysis with geographic information systems and spatial modeling for understanding the dynamics of exotic species invasions. Numéro de notice : A2002-233 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article DOI : sans En ligne : https://www.asprs.org/wp-content/uploads/pers/2002journal/october/2002_oct_1001- [...] Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22147
in Photogrammetric Engineering & Remote Sensing, PERS > vol 68 n° 10 (October 2002) . - pp 1001 - 1009[article]Bidirectional NDVI and atmospherically resistant BRDF inversion for vegetation canopy / F. Gao in IEEE Transactions on geoscience and remote sensing, vol 40 n° 6 (June 2002)
[article]
Titre : Bidirectional NDVI and atmospherically resistant BRDF inversion for vegetation canopy Type de document : Article/Communication Auteurs : F. Gao, Auteur ; Y.J. Xiaowen, Auteur ; C.B. Schaaf, Auteur ; A. Strahler, Auteur Année de publication : 2002 Article en page(s) : pp 1269 - 1278 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Télédétection
[Termes IGN] bande infrarouge
[Termes IGN] bande rouge
[Termes IGN] canopée
[Termes IGN] distribution du coefficient de réflexion bidirectionnelle BRDF
[Termes IGN] éclairement lumineux
[Termes IGN] image optique
[Termes IGN] image Terra-MODIS
[Termes IGN] inversion
[Termes IGN] modèle physique
[Termes IGN] Normalized Difference Vegetation Index
[Termes IGN] spectroradiométrieRésumé : (Auteur) The normalized difference vegetation index (NDVI) has been widely applied in optical remote sensing. However, it has been demonstrated that NDVI is still partially affected by atmospheric path scattering and bidirectional (illumination and viewing geometry) effects. In this paper we present the benefit of using a bidirectional NDVI, and we discuss the problems in using the maximum NDVI composite method. Based on the assumption that a clear day has a larger NDVI value and a cloudy day has a smaller NDVI value (smaller reflectance in the nearinfrared band and larger reflectance in red band due to atmospheric path scattering), the ratio of squared observed NDVI values and calculated NDVI values is used as a weight in our inversion method. The calculated NDVI values are derived from previously inverted bidirectional reflectance distribution functions (BRDFs). The inversion process will loop until all weights converge. Our research on the early Terra/MODIS data using a semiempirical kerneldriven BRDF model (the RossThickLiTransit model) shows that this new method can improve inversion results whenever some cloudy pixels are not filtered out. As cloud detection and subpixel cloudiness are always a problem, this technique should still be very useful in improving the quality of BRDF inversion. Numéro de notice : A2002-187 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2002.800241 En ligne : https://ieeexplore.ieee.org/document/1020259 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22102
in IEEE Transactions on geoscience and remote sensing > vol 40 n° 6 (June 2002) . - pp 1269 - 1278[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 065-02061 RAB Revue Centre de documentation En réserve L003 Disponible 065-02062 RAB Revue Centre de documentation En réserve L003 Disponible Evaluation of narrowband and broadband vegetation indices for determining optimal hyperspectral wavebands for agricultural crop characterization / Prasad S. Thenkabail in Photogrammetric Engineering & Remote Sensing, PERS, vol 68 n° 6 (June 2002)
[article]
Titre : Evaluation of narrowband and broadband vegetation indices for determining optimal hyperspectral wavebands for agricultural crop characterization Type de document : Article/Communication Auteurs : Prasad S. Thenkabail, Auteur ; R.b Smith, Auteur ; E. De Pauw, Auteur Année de publication : 2002 Article en page(s) : pp 607 - 621 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique
[Termes IGN] azote
[Termes IGN] bande infrarouge
[Termes IGN] bande spectrale
[Termes IGN] bande visible
[Termes IGN] blé (céréale)
[Termes IGN] caractérisation
[Termes IGN] cultures
[Termes IGN] image Landsat-TM
[Termes IGN] indice de végétation
[Termes IGN] Leaf Area Index
[Termes IGN] Normalized Difference Vegetation Index
[Termes IGN] orge (céréale)Résumé : (Auteur) The main goal of the study was to determine optimal waveband centers and widths required to best estimate agricultural crop characteristics. The hyperspectral narrowband data was acquired over 395 to 1010 nanometers using a 1.43-nanometerwide, 430 bands, hand-held spectroradiometer. Broadband data were derived using a Landsat-5 Thematic Mapper image acquired to correspond with field spectroradiometer and ground-truth measurements. Spectral and biophysical data were obtained from 196 sample locations, including forms and rangelands, Six representative crops grown during the main cropping season were selected: barley, wheat, lentil, cumin, chickpea, and vetch. Biophysical variables consisted of leaf area index, wet biornass, dry biomass, plant height, plant nitrogen, and canopy cover.
Narrowband and broadband vegetation indices were computed and their relationship with quantitative crop characteristics were established and compared. The simple narrowband two-band vegetation indices (TBVI) and the optimum multiple-band vegetation indices (OMBVI) models provided the best results. The narrowband TBVI and omBvi models are compared with six other categories of narrow and broadband indices, Compared to the best broadband Tm indices, TBvi explained up to 24 percent greater variability and OMBYI explained up to 27 percent greater variability in estimating different crop variables. A Predominant proportion of crop characteristics are best estimated using data from four narrowbands, in order of importance, centered around 675 nanometers (red absorption maxima), 905 run (near-infrared reflection peak), 720 run (mid portion of the red-edge), and 550 run (green reflectance maxima). The study determined 12 spectral bands and their bandwidths (Table 5) that provide optimal agricultural crop characteristics in the visible and near-infrared portion of the spectrum.Numéro de notice : A2002-134 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans En ligne : https://www.tetracam.com/PDFs/Rec_Cite2.pdf Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22049
in Photogrammetric Engineering & Remote Sensing, PERS > vol 68 n° 6 (June 2002) . - pp 607 - 621[article]Inundation discriminated using sun glint / V.C. Vanderbilt in IEEE Transactions on geoscience and remote sensing, vol 40 n° 6 (June 2002)
[article]
Titre : Inundation discriminated using sun glint Type de document : Article/Communication Auteurs : V.C. Vanderbilt, Auteur ; G Perry, Auteur ; G.P. Livingston, Auteur ; S.L. Ustin, Auteur ; et al., Auteur Année de publication : 2002 Article en page(s) : pp 1279 - 1287 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Télédétection
[Termes IGN] bande rouge
[Termes IGN] distribution du coefficient de réflexion bidirectionnelle BRDF
[Termes IGN] inondation
[Termes IGN] Normalized Difference Vegetation Index
[Termes IGN] POLarization and Directionality of Earth's Reflectances
[Termes IGN] réflectance végétale
[Termes IGN] télédétection spatiale
[Termes IGN] zone inondableRésumé : (Auteur) Inundation is linked to water, carbon, and energy budgets at landscape to global scales. We describe a new remote sensing technique for identifying inundated areas based on the properties of the glitterthe strong, angular signature reflection that is characteristic of surface water and uncharacteristic of other cover types. We discriminated three cover types vegetation emergent above inundated soils, open water, and noninundated cover types from analysis of directional data collected in the red spectral band by the airborne POLDER (polarization and directionality of earth's reflectance) sensor. We found that values of the normalized difference vegetation index (NDVI) decreased dramatically in the glitter direction, providing an indication of surface water. Application of our new technique holds promise for mapping the seasonal and interannual extent of inundation, a key descriptor of wetlands hydrology. Numéro de notice : A2002-188 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2002.800233 En ligne : https://doi.org/10.1109/TGRS.2002.800233 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22103
in IEEE Transactions on geoscience and remote sensing > vol 40 n° 6 (June 2002) . - pp 1279 - 1287[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 065-02061 RAB Revue Centre de documentation En réserve L003 Disponible 065-02062 RAB Revue Centre de documentation En réserve L003 Disponible Predicting mammal species richness and abundance using multi-temporal NDVI / B.O. Oindo in Photogrammetric Engineering & Remote Sensing, PERS, vol 68 n° 6 (June 2002)
[article]
Titre : Predicting mammal species richness and abundance using multi-temporal NDVI Type de document : Article/Communication Auteurs : B.O. Oindo, Auteur Année de publication : 2002 Article en page(s) : pp 623 - 629 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique
[Termes IGN] Advanced Very High Resolution Radiometer
[Termes IGN] biodiversité
[Termes IGN] changement climatique
[Termes IGN] indice de végétation
[Termes IGN] Kenya
[Termes IGN] Normalized Difference Vegetation IndexRésumé : (Auteur) There is need to map indicators of biodiversity such as species richness and abundance of individuals in order to predict where species loss is occurring. Species richness and abundance have been hypothesized to increase with ecosystem productivity. Moreover, productivity of ecosystems varies in space and time, and this heterogeneity is also hypothesized to influence species richness and abundance of individuals. Ecosystem productivity may be estimated using remotely sensed data, and researchers have specifically proposed the Advanced Very High Resolution Radiometer-Normalized Difference Vegetation Index (AVHRR-NDVI). Interannual average NDw and its variability (standard deviation) were correlated with large mammal species richness and abundance of individuals at a landscape scale in Kenya. The biodiversity indicators associated negatively with interannual average NDW and positively with variability of NDvi. Understanding these relationships can help in estimating changes in mammalian species richness and abundance in response to global climate change. Numéro de notice : A2002-135 Affiliation des auteurs : non IGN Thématique : BIODIVERSITE/IMAGERIE Nature : Article DOI : sans En ligne : https://www.asprs.org/wp-content/uploads/pers/2002journal/june/2002_jun_623-629. [...] Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22050
in Photogrammetric Engineering & Remote Sensing, PERS > vol 68 n° 6 (June 2002) . - pp 623 - 629[article]Estimation interactive de l'indice foliaire à l'échelle régionale par décomposition "sub-pixelaire" du signal Spot4-Végétation / Fabrice Cipriani in Bulletin [Société Française de Photogrammétrie et Télédétection], n° 167 (Avril 2002)PermalinkFuzzy modelling of African ecoregions and ecotones using AVHRR NDVI temporal imagery / M. Ji in Geocarto international, vol 17 n° 1 (March - May 2002)PermalinkThe use of Landsat derived multi-temporal NDVI to assess the impact of the construction of the central Pilbara railway on vegetation conditions, Karijini / J. Wilson in Geocarto international, vol 17 n° 1 (March - May 2002)PermalinkMapping potential risk of valley fever outbreaks in African savannas using vegetation index time series data / A. Anyamba in Photogrammetric Engineering & Remote Sensing, PERS, vol 68 n° 2 (February 2002)PermalinkAnalyse de données acquises par laser aéroporté pour la reconstruction 3D de scènes urbaines / R. Elkharroubi (2002)PermalinkApprofondissement des techniques de diagnostique des propriétés spectrales d'une culture / Laure Chandelier (2002)PermalinkExpertise agronomique dans le cadre de l'agriculture de précision / C. Dron (2002)PermalinkRelationship between drought indicators based on remote sensing and forest fires incidence in Spain / Águeda Vázquez (2001)PermalinkDéconvolution des signatures spectrales de séries d'images satellitales / Sonia Zine (2000)PermalinkIntroductory remote sensing / P.J. Gibson (2000)Permalink