Descripteur
Documents disponibles dans cette catégorie (1788)
![](./images/expand_all.gif)
![](./images/collapse_all.gif)
Etendre la recherche sur niveau(x) vers le bas
Vers une simulation multi-agents de groupes d'individus pour modéliser les mobilités résidentielles intra-urbaines / J.G. Quijano in Revue internationale de géomatique, vol 17 n° 2 (juin – août 2007)
![]()
[article]
Titre : Vers une simulation multi-agents de groupes d'individus pour modéliser les mobilités résidentielles intra-urbaines Type de document : Article/Communication Auteurs : J.G. Quijano, Auteur ; Marie Piron, Auteur ; Alexis Drogoul, Auteur Année de publication : 2007 Article en page(s) : pp 161 - 181 Note générale : Bibliographie Langues : Français (fre) Descripteur : [Vedettes matières IGN] Analyse spatiale
[Termes IGN] Bogota (Colombie)
[Termes IGN] habitat individuel
[Termes IGN] milieu urbain
[Termes IGN] mobilité urbaine
[Termes IGN] simulation dynamique
[Termes IGN] système multi-agentsRésumé : (Auteur) Dans le cadre d'un programme de recherche sur les mobilités spatiales et les transformations territoriales de la ville de Bogota, nous proposons un système de simulation multi-agent pour modéliser les mobilités résidentielles intra-urbaines. Le parti pris du modèle est de situer la prise de décision à un niveau mésoscopique de groupes pertinents d'individus définis de façon émergente à partir du niveau individuel. Le système est constitué de deux modèles articulés entre eux. Le premier modélise la formation de groupes d'individus (à partir de calculs de similarité entre leurs caractéristiques socio-économiques) et leur évolution grâce à la définition des règles générales ; la motivation à déménager est implémentée au niveau individuel. Le deuxième modèle est de nature économique. Il situe la décision de déménager au niveau agrégé et modélise les mobilités résidentielles à l'aide d'un mécanisme d'enchères de logements. Copyright Hermès Numéro de notice : A2007-353 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.3166/rig.17.161-181 En ligne : https://doi.org/10.3166/rig.17.161-181 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28716
in Revue internationale de géomatique > vol 17 n° 2 (juin – août 2007) . - pp 161 - 181[article]Réservation
Réserver ce documentExemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 047-07021 RAB Revue Centre de documentation En réserve L003 Disponible Mapping an invasive plant, Phragmites australis [roseau], in coastal wetlands using the EO-1 Hyperion hyperspectral sensor / B.W. Pengra in Remote sensing of environment, vol 108 n° 1 (15/05/2007)
![]()
[article]
Titre : Mapping an invasive plant, Phragmites australis [roseau], in coastal wetlands using the EO-1 Hyperion hyperspectral sensor Type de document : Article/Communication Auteurs : B.W. Pengra, Auteur ; C.A. Johnston, Auteur ; T.R. Loveland, Auteur Année de publication : 2007 Article en page(s) : pp 74 - 81 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] carte thématique
[Termes IGN] espèce exotique envahissante
[Termes IGN] Grands Lacs
[Termes IGN] image EO1-Hyperion
[Termes IGN] image hyperspectrale
[Termes IGN] marais
[Termes IGN] phytogéographie
[Termes IGN] plante aquatique d'eau salée
[Termes IGN] répartition géographique
[Termes IGN] Wisconsin (Etats-Unis)Résumé : (Auteur) Mapping tools are needed to document the location and extent of Phragmites australis, a tall grass that invades coastal marshes throughout North America, displacing native plant species and degrading wetland habitat. Mapping Phragmites is particularly challenging in the freshwater Great Lakes coastal wetlands due to dynamic lake levels and vegetation diversity. We tested the applicability of Hyperion hyperspectral satellite imagery for mapping Phragmites in wetlands of the west coast of Green Bay in Wisconsin, U.S.A. A reference spectrum created using Hyperion data from several pure Phragmites stands within the image was used with a Spectral Correlation Mapper (SCM) algorithm to create a raster map with values ranging from 0 to 1, where 0 represented the greatest similarity between the reference spectrum and the image spectrum and 1 the least similarity. The final two-class thematic classification predicted monodominant Phragmites covering 3.4% of the study area. Most of this was concentrated in long linear features parallel to the Green Bay shoreline, particularly in areas that had been under water only six years earlier when lake levels were 66 cm higher. An error matrix using spring 2005 field validation points (n = 129) showed good overall accuracy—81.4%. The small size and linear arrangement of Phragmites stands was less than optimal relative to the sensor resolution, and Hyperion's 30 m resolution captured few if any pure pixels. Contemporary Phragmites maps prepared with Hyperion imagery would provide wetland managers with a tool that they currently lack, which could aid attempts to stem the spread of this invasive species. Copyright Elsevier Numéro de notice : A2007-217 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.rse.2006.11.002 En ligne : https://doi.org/10.1016/j.rse.2006.11.002 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28580
in Remote sensing of environment > vol 108 n° 1 (15/05/2007) . - pp 74 - 81[article]Modelling and mapping potential hooded warbler (Wilsonia citrina) habitat using remotely sensed imagery / J. Pasher in Remote sensing of environment, vol 107 n° 3 (12 April 2007)
![]()
[article]
Titre : Modelling and mapping potential hooded warbler (Wilsonia citrina) habitat using remotely sensed imagery Type de document : Article/Communication Auteurs : J. Pasher, Auteur ; Dominique King, Auteur ; K. Lindsay, Auteur Année de publication : 2007 Article en page(s) : pp 471 - 483 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] Aves
[Termes IGN] carte thématique
[Termes IGN] classification par maximum de vraisemblance
[Termes IGN] habitat animal
[Termes IGN] image Ikonos
[Termes IGN] image Landsat
[Termes IGN] luminance lumineuse
[Termes IGN] Ontario (Canada)
[Termes IGN] photo-interprétation
[Termes IGN] précision de la classification
[Termes IGN] régression logistiqueRésumé : (Auteur) Modelling and mapping of hooded warbler (Wilsonia citrina) nesting habitat in forests of southern Ontario were conducted using Ikonos and Landsat data. The study began with an analysis of skyward hemispherical photography to determine canopy characteristics associated with nest sites. It showed that nest sites had significantly less overhead canopy cover and larger maximum gap size than in non-nest areas. These findings led to the hypothesis that brightness variability in high to moderate resolution remotely sensed imagery may be greater at nest sites than in non-nest areas due to larger shadows and greater shadow variability related to these gap characteristics. This was confirmed when, in addition to some spectral band brightness variables, several image texture and spectrally unmixed fraction (shadow, bare soil) variables were found to be significantly different for nest and non-nest sites in Ikonos and Landsat imagery. These significantly different variables were used in maximum likelihood classification (MLC) and logistic regression (LR) to produce maps of potential nesting habitat. Mapping was conducted with Ikonos and Landsat in a local area where most known nest sites occur, and regionally using Landsat data for almost all of the hooded warbler range in southern Ontario. For the local area mapping using Ikonos data, a posteriori probabilities for both the MLC and LR methods showed that about 62% of the nest sites set aside for validation had been classified with high probability (p > 0.70) in the nest class. MLC mapping accuracy was 70% for the validation nest sites and 87% of validation nest sites were within 10 m of classified nesting habitat, a distance approximately equivalent to expected positional error in the data. LR accuracy was slightly lower. Nest site MLC mapping accuracy in the local area using Landsat data was 87% but the map was much coarser due to the larger pixel size. Regional mapping with Landsat imagery produced lower classification accuracy due to high errors of commission for the habitat class. This resulted from a poor spatial distribution and low number of observations of nest sites throughout the region compared to the local area, while the non-nest site data distribution was too narrow, having been defined and assessed (using standard accepted methods) as areas with no ground shrubs. If either of these problems can be ameliorated, regional mapping accuracy may improve. Copyright Elsevier Numéro de notice : A2007-139 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.rse.2006.09.022 En ligne : https://doi.org/10.1016/j.rse.2006.09.022 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28502
in Remote sensing of environment > vol 107 n° 3 (12 April 2007) . - pp 471 - 483[article]
[article]
Titre : NOAA opus Type de document : Article/Communication Auteurs : N.D.. Weston, Auteur ; T. Soler, Auteur ; G.L. Mader, Auteur Année de publication : 2007 Article en page(s) : pp 23 - 25 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Information géographique
[Termes IGN] Etats-Unis
[Termes IGN] positionnement par GPS
[Termes IGN] précision centimétrique
[Termes IGN] serveur web
[Termes IGN] service fondé sur la position
[Termes IGN] système de référence géodésique
[Termes IGN] système de référence local
[Termes IGN] utilisateurRésumé : (Auteur) Since March 2001 the National Geodetic Survey (NGS) has operated the Online Positioning User Service (OPUS) to provide end-users with easy access to the US National Spatial Reference System (NSRS). This popular web-based application provides accurate, reliable and consistent geodetic coordinates with minimal user input. A submitted GPS data file is usually processed within a few minutes and the computed coordinates are accurate to a few centimetres. Copyright Reed Business Information Numéro de notice : A2007-146 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28509
in GIM international > vol 21 n° 4 (April 2007) . - pp 23 - 25[article]Réservation
Réserver ce documentExemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 061-07041 RAB Revue Centre de documentation En réserve L003 Disponible MISR-based passive optical bathymetry from orbit with few-cm level of accuracy on the Salar de Uyuni, Bolivia / B.G. Bills in Remote sensing of environment, vol 107 n° 1-2 (15 March 2007)
![]()
[article]
Titre : MISR-based passive optical bathymetry from orbit with few-cm level of accuracy on the Salar de Uyuni, Bolivia Type de document : Article/Communication Auteurs : B.G. Bills, Auteur ; A. Borsa, Auteur ; R.L. Comstock, Auteur Année de publication : 2007 Article en page(s) : pp 240 - 255 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique
[Termes IGN] bathymétrie
[Termes IGN] Bolivie
[Termes IGN] capteur passif
[Termes IGN] désert
[Termes IGN] image optique
[Termes IGN] image Terra-MISR
[Termes IGN] inondation
[Termes IGN] sel gemmeRésumé : (Auteur) We demonstrate that, under ideal circumstances, passive optical measurements can yield surface water depth estimates with an accuracy of a few centimeters. Our target area is the Salar de Uyuni, in Bolivia. It is a large, active salt flat or playa, which is maintained as an almost perfectly level and highly reflective surface by annual flooding, to a mean depth of 30–50 cm. We use MISR data to estimate spatial and temporal variations in water depth during the waning portion of the 2001 flooding cycle. We use a single ICESat laser altimetry profile to calibrate our water depth model. Though the salt surface is probably the smoothest surface of its size on Earth, with less that 30 cm RMS height variations over an area of nearly 104 km2, it is not completely featureless. Topography there includes a peripheral depression, or moat, around the edge of the salt, and several sets of prominent parallel ridges, with 5 km wavelength and 30 cm amplitude. The process by which these features form is still not well characterized. Copyright Elsevier Numéro de notice : A2007-055 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.rse.2006.11.006 En ligne : https://doi.org/10.1016/j.rse.2006.11.006 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28420
in Remote sensing of environment > vol 107 n° 1-2 (15 March 2007) . - pp 240 - 255[article]Support vector machines for recognition of semi-arid vegetation types using MISR multi-angle imagery / L. Su in Remote sensing of environment, vol 107 n° 1-2 (15 March 2007)
PermalinkEvaluating the uncertainty caused by Post Office Box addresses in environmental health studies: A restricted Monte Carlo approach / X. Shi in International journal of geographical information science IJGIS, vol 21 n° 3-4 (march - april 2007)
PermalinkGeographic information systems as media and society : does GIS wear a white and black Stetson? / W.W. Crumplin in Cartographica, vol 42 n° 1 (March 2007)
PermalinkGlobal and local spatial indices of urban segregation / F.F. Feitosa in International journal of geographical information science IJGIS, vol 21 n° 3-4 (march - april 2007)
PermalinkInSAR imaging of volcanic deformation over cloud-prone areas: Aleutian islands / Zhong Lu in Photogrammetric Engineering & Remote Sensing, PERS, vol 73 n° 3 (March 2007)
PermalinkNetwork real-time kinematic performance analysis using RTCM 3.0 and the Southern Alberta network / Kyle O'Keefe in Geomatica, vol 61 n° 1 (March 2007)
PermalinkRaster-network regionalization for watershed data processing / T.L. Whiteaker in International journal of geographical information science IJGIS, vol 21 n° 3-4 (march - april 2007)
PermalinkSpectral analysis of coastal vegetation and land cover using AISA+ hyperspectral data / R. Jensen in Geocarto international, vol 22 n° 1 (March - May 2007)
PermalinkTerrestrial and submerged aquatic vegetation mapping in Fire Island national seashore using high spatial resolution remote sensing data / Y. Wang in Marine geodesy, vol 30 n° 1-2 (March - June 2007)
PermalinkQuality assessment of SRTM C- and X-band interferometric data: Implications for the retrieval of vegetation canopy height / W.S. Walker in Remote sensing of environment, vol 106 n° 4 (28/02/2007)
PermalinkComputing coastal ocean surface curreants from infrared and ocean color satellite imagery / R.I. Crocker in IEEE Transactions on geoscience and remote sensing, vol 45 n° 2 (February 2007)
PermalinkModeling long-period noise in kinematic GPS applications / A. Borsa in Journal of geodesy, vol 81 n° 2 (February 2007)
PermalinkPermalinkComparative tempo-spatial pattern analysis: CTSPA / Y. Xie in International journal of geographical information science IJGIS, vol 21 n° 1-2 (january 2007)
PermalinkPermalinkICESat altimetry data product verification at White Sands Space Harbor / L.A. Magruder in IEEE Transactions on geoscience and remote sensing, vol 45 n° 1 (January 2007)
PermalinkPermalinkMise en place d'une procédure de post-traitement GPS pour du lever cadastral massif / Fabien Coubard (2007)
PermalinkMulti-scale correlations between topography and vegetation in a hillside catchment of Honduras / A. Nelson in International journal of geographical information science IJGIS, vol 21 n° 1-2 (january 2007)
PermalinkAn examination of GIS success within local government departments in the U.K. and in Trinidad and Tobago / S.M. Baban in Surveying and land information science, vol 66 n° 4 (01/12/2006)
Permalink