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Interrelationships between spatial resolution and per-pixel classifiers for extracting information classes part 2: the natural environment / M.E. Hodgson (29/03/2006)Mangrove mapping and monitoring: RS and GIS in conservation and management planning / S.K. Singh in GIM international, vol 20 n° 3 (March 2006)
[article]
Titre : Mangrove mapping and monitoring: RS and GIS in conservation and management planning Type de document : Article/Communication Auteurs : S.K. Singh, Auteur ; S.P.S. Kushwaha, Auteur ; P. Joshi, Auteur Année de publication : 2006 Article en page(s) : pp 61 - 63 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] analyse spatiale
[Termes IGN] classification dirigée
[Termes IGN] écosystème
[Termes IGN] image IRS
[Termes IGN] Inde
[Termes IGN] mangrove
[Termes IGN] surveillance forestière
[Termes IGN] système d'information géographiqueRésumé : (Editeur) The mangroves of the Sunderban area in India are one of the most productive and diverse ecosystems in the world, and yet they are a threatened habitat. To formulate a conservation and management plan periodic mapping and monitoring of mangroves is a prime requisite. The authors demonstrate that remote sensing and GIS techniques, including visual interpretation, are effective and efficient techniques for this purpose. Numéro de notice : A2006-114 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27841
in GIM international > vol 20 n° 3 (March 2006) . - pp 61 - 63[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 061-06031 RAB Revue Centre de documentation En réserve L003 Disponible Mapping the effects of water stress on sphagnum: preliminary observations using airborne remote sensing / A. Harris in Remote sensing of environment, vol 100 n° 3 (15 february 2006)
[article]
Titre : Mapping the effects of water stress on sphagnum: preliminary observations using airborne remote sensing Type de document : Article/Communication Auteurs : A. Harris, Auteur ; R.G. Bryant, Auteur ; A.J. Baird, Auteur Année de publication : 2006 Article en page(s) : pp 363 - 378 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] analyse spectrale
[Termes IGN] canopée
[Termes IGN] eau de surface
[Termes IGN] humidité du sol
[Termes IGN] image aérienne
[Termes IGN] indice d'humidité
[Termes IGN] plante aquatique d'eau salée
[Termes IGN] réflectance spectrale
[Termes IGN] réflectance végétale
[Termes IGN] Royaume-Uni
[Termes IGN] Sphagnum (genre)
[Termes IGN] stress hydrique
[Termes IGN] tourbe
[Termes IGN] zone humideRésumé : (Auteur) Remote sensing of near-surface hydrological conditions within northern peatlands has the potential to provide important large-scale hydrological information regarding ecological and carbon-balance processes occuring within such systems. This article details how field knowledge of the spectral properties of Sphagnum spp., airborne remote sensing data and a range of image analysis approaches may be combined to provide a suitable proxy for near-surface wetness. Co-incident field and airborne remote sensing data were acquired in May and September 2002 over an important UK raised bog (Cors Fochno). A combination of laboratory-tested NIR and SWIR water-based and biophysical spectral reflectance indices were applied to field and airborne reflectance spectra of Sphagnum pulchrum to elucidate changes in near-surface moisture conditions. Field results showed significant correlations between water-based indices (moisture stress index (MSI) and floating water band indices (fWBI980 and fWB1200) and measures of both near-surface volumetric moisture content (VMC) and water-table position. Spectral indices formulated from the NIR (fWBI980 and fWBI1200) proved to be the most useful for indicating near-surface wetness across the widest range of moisture conditions because of their ability to penetrate deeper into the Sphagnum canopy. Correlations between a biophysical index based upon chlorophyll content and both hydrological measures were not significant, possibly due to relatively high levels of surface wetness at the field site in both May and September. S. pulchrum lawns were successfully located and mapped from airborne imagery using the mixed tuned match filtering (MTMF) algorithm. Importantly, MSI derived from airborne data was significantly correlated with both field moisture and the water-table position. Relationships between measures of near-surface wetness and the MSI for naturally heterogeneous canopies were, however, found to be weaker for airborne imagery than for associated field data. This is likely to be a result of the formulation of the MSI itself and the possible preferential detection of "wetter" pixels within the imagery. This effectively reduced the ability of MSI to detect subtle changes in near-surface wetness under high moisture conditions, but would not impede the use of the index under drier conditions. Results from the field data suggest that indices formulated from the NIR may be more suitable for detailed estimations of near-surface and surface wetness at the landscape-scale although reliable hyperspectral data are required to test fully the performance of such indices. The relative merits of using such an approach to determine near-surface hydrological conditions across entire peatland complexes are also discussed. Numéro de notice : A2006-036 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.rse.2005.10.024 En ligne : https://doi.org/10.1016/j.rse.2005.10.024 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27763
in Remote sensing of environment > vol 100 n° 3 (15 february 2006) . - pp 363 - 378[article]Ecosystem survey data mapping interface, web-based GIS application for ocean species sample analysis / H. Dai in GIM international, vol 20 n° 2 (February 2006)
[article]
Titre : Ecosystem survey data mapping interface, web-based GIS application for ocean species sample analysis Type de document : Article/Communication Auteurs : H. Dai, Auteur ; L. Chen, Auteur Année de publication : 2006 Article en page(s) : pp 61 - 63 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG
[Termes IGN] cartographie thématique
[Termes IGN] écosystème
[Termes IGN] faune aquatique
[Termes IGN] interface web
[Termes IGN] océanographie
[Termes IGN] répartition géographique
[Termes IGN] système d'information géographiqueRésumé : (Auteur) Data on ocean species has been being sampled along US coastlines for some sixty years. To enable scientists requiring such data for a variety of investigations to retrieve it and create dynamic spatial distribution GIS maps, the authors developed a Web-based application, the EcoSystem Survey Data Mapping Interface, which allows easy creation of dynamic GIS maps and interaction with them using GIS tools. Numéro de notice : A2006-139 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27866
in GIM international > vol 20 n° 2 (February 2006) . - pp 61 - 63[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 061-06021 RAB Revue Centre de documentation En réserve L003 Disponible An empirical investigation of cross-sensor relationships of NDVI and red/near-infrared reflectance using EO-1 Hyperion data / T. Miura in Remote sensing of environment, vol 100 n° 2 (30 January 2006)
[article]
Titre : An empirical investigation of cross-sensor relationships of NDVI and red/near-infrared reflectance using EO-1 Hyperion data Type de document : Article/Communication Auteurs : T. Miura, Auteur ; A. Huete, Auteur ; Hiroki Yoshioka, Auteur Année de publication : 2006 Article en page(s) : pp 223 - 236 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] analyse comparative
[Termes IGN] bande rouge
[Termes IGN] Brésil
[Termes IGN] étalonnage des données
[Termes IGN] filtre passe-bande
[Termes IGN] flore locale
[Termes IGN] forêt tropicale
[Termes IGN] image EO1-Hyperion
[Termes IGN] image hyperspectrale
[Termes IGN] image Landsat-ETM+
[Termes IGN] image Terra-MODIS
[Termes IGN] Normalized Difference Vegetation Index
[Termes IGN] rayonnement proche infrarouge
[Termes IGN] réflectance spectrale
[Termes IGN] savaneRésumé : (Auteur) Long term observations of global vegetation from multiple satellites require much effort to ensure continuity and compatibility due to differences in sensor characteristics and product generation algorithms. In this study, we focused on the band-pass filter differences and empirically investigated cross-sensor relationships of the normalized difference vegetation index (NDVI) and reflectance. The specific objectives were: 1) to understand the systematic trends in cross-sensor relationships of the NDVI and reflectance as a function of spectral band-passes, 2) to examine/ identify the relative importance of the spectral features (i.e., the green peak, red edge, and leaf liquid water absorption regions) in and the mechanism(s) of causing the observed systematic trends, and 3) to evaluate the performance of several empirical cross-calibration methods in modelling the observed systematic trends. A Level 1A Hyperion hyperspectral image acquired over a tropical forest-savanna transitional region in Brazil was processed to simulate atmospherically corrected reflectances and NDVI for various band-passes, including Terra Moderate Resolution Imaging Spectro-radiometer (MODIS), NOAA-14 Advanced Very High Resolution Radiometer (AVHRR), and Landsat7 Enhanced Thematic Mapper Plus (ETM+). Data were extracted from various land cover types typically found in tropical forest and savanna biomes and used for analyses. Both NDVI and reflectance relationships among the sensors were neither linear nor unique and were found to exhibit complex patterns and band-pass dependencies. The reflectance relationships showed strong land cover dependencies. The NDVI relationships, in contrast, did not show land cover dependencies, but resulted in non-linear forms. From sensitivity analyses, the green peak (550 nm) and red-NIR transitional (680780 nm) features were identified as the key factors in producing the observed land cover dependencies and non-linearity in cross-sensor relationships. In particular, differences in the extents to which the red and/or NIR band-passes included these features significantly influenced the forms and degrees of non-linearity in the relationships. Translation of MODIS NDVI to "AVHRR Iike" NDVI using a weighted average of MODIS green and red bands performed very poorly, resulting in no reduction of overall discrepancy between MODIS and AVHRR NDVI. Cross-calibration of NDVI and reflectance using NDVI-based quadratic functions performed well, reducing their differences to +.025 units for the NDVI and +.01 units for the reflectances; however, many of the translation results suffered from bias errors. The present results suggest that distinct translation equations and coefficients need to be developed for every sensor pairs and that land cover-dependency need to be explicitly accounted for to reduce bias errors. Numéro de notice : A2006-034 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.rse.2005.10.010 En ligne : https://doi.org/10.1016/j.rse.2005.10.010 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27761
in Remote sensing of environment > vol 100 n° 2 (30 January 2006) . - pp 223 - 236[article]Acquisition de connaissances pour la simulation en immersion (ACSI) / D. Sebastien (2006)PermalinkComparing accuracy assessments to infer superiority of image classification methods / J. De Leleuw in International Journal of Remote Sensing IJRS, vol 27 n°1-2 (January 2006)PermalinkEarly prediction of crop production using drought indices at different time-scales and remote sensing data: application in the Ebro Valley (north-east Spain) / S.M. Vicente-Serrano in International Journal of Remote Sensing IJRS, vol 27 n°1-2 (January 2006)PermalinkL'environnement en France, édition 2006 / Bruno Trégouët (2006)PermalinkExtraction of tidal channel networks from aerial photographs alone and combined with laser altimetry / Bharat Lohani in International Journal of Remote Sensing IJRS, vol 27 n°1-2 (January 2006)PermalinkA digital camera as a tool to measure colour indices and related properties of sandy soils in semi-arid environments / N. Levin in International Journal of Remote Sensing IJRS, vol 26 n° 24 (December 2005)PermalinkApplication of multiple endmember spectral mixture analysis (MESMA) to AVIRIS imagery for coastal salt marsh mapping: a case study in China Camp, CA, USA / L. Li in International Journal of Remote Sensing IJRS, vol 26 n° 23 (December 2005)PermalinkMapping submergent aquatic vegetation in the US Great Lakes using Quickbird satellite data / P.T. Wolter in International Journal of Remote Sensing IJRS, vol 26 n° 23 (December 2005)PermalinkUsing satellite imagery and GIS for land-use and land-cover change mapping in an estuarine watershed / X. Yang in International Journal of Remote Sensing IJRS, vol 26 n° 23 (December 2005)PermalinkUtilisation des signatures de texture d'ordre elevé pour une meilleure discrimination des classes d'occupation du sol sur une image radar à synthese d'ouverture / E. Tonye in Revue Française de Photogrammétrie et de Télédétection, n° 179 (Décembre 2005)PermalinkSub-pixel estimation of urban land cover components with linear mixture model analysis and Landsat Thematic Mapper imagery / S. Lee in International Journal of Remote Sensing IJRS, vol 26 n° 22 (November 2005)PermalinkEstimating sub-pixel surface roughness using remotely sensed stereoscopic data / A. Mushkin in Remote sensing of environment, vol 99 n° 1-2 (15 November 2005)PermalinkCaractérisation d'un habitat forestier tempéré par télédétection satellitale pour le suivi de populations aviennes : cas des mésanges en forêt de Larivour (Aube, France) / V. Godard in Photo interprétation, vol 41 n° 4 (Novembre 2005)PermalinkMesures et caractérisation des changements d'occupation des sols à partir de l'analyse diachronique de données satellitales : application à la zone humide d'Akgöl (Turquie) / D. Gramond in Photo interprétation, vol 41 n° 4 (Novembre 2005)PermalinkComment expliquer la localisation des usages du sol par les agriculteurs ? Le cas des Marais de l'Ouest / A. Gerbaud in Revue internationale de géomatique, vol 15 n° 3 (septembre – novembre 2005)PermalinkParamétrisation d'un simulateur du système "ville/milieu naturel" à l'aide d'une image Ikonos : application sur un secteur du grand Lyon / S. Hosford in Revue Française de Photogrammétrie et de Télédétection, n° 178 (Septembre 2005)PermalinkDetecting vegetation changes in a wetland area in Northern Germany using earth observation and geodata / Konstanze Kleinod in Journal for nature conservation, vol 13 n° 2-3 (July 2005)PermalinkKernel based re-classification of Earth observation data for fine scale habitat mapping / Iphigenia Keramitsoglou in Journal for nature conservation, vol 13 n° 2-3 (July 2005)PermalinkObject-oriented methods for habitat mapping at multiple scales : Case studies from Northern Germany and Wye Downs, UK / Michaël Bock in Journal for nature conservation, vol 13 n° 2-3 (July 2005)PermalinkImages, modèles et biomasse immergée : cartographie des herbiers de zostères en Camargue à partir d'images SPOT-5 / C. Puech in Revue internationale de géomatique, vol 15 n° 2 (juin – août 2005)Permalink