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Per-pixel classification of high spatial resolution satellite imagery for urban land-cover mapping / D. Hester in Photogrammetric Engineering & Remote Sensing, PERS, vol 74 n° 4 (April 2008)
[article]
Titre : Per-pixel classification of high spatial resolution satellite imagery for urban land-cover mapping Type de document : Article/Communication Auteurs : D. Hester, Auteur ; H. Cakir, Auteur ; et al., Auteur Année de publication : 2008 Article en page(s) : pp 463 - 471 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique
[Termes IGN] Caroline du Nord (Etats-Unis)
[Termes IGN] carte d'occupation du sol
[Termes IGN] cartographie urbaine
[Termes IGN] classification pixellaire
[Termes IGN] erreur de classification
[Termes IGN] image à très haute résolution
[Termes IGN] image Quickbird
[Termes IGN] précision géométrique (imagerie)Résumé : (Auteur) Commercial high spatial resolution satellite data now provide a synoptic and consistent source of digital imagery with detail comparable to that of aerial photography. In the work described here, per-pixel classification, image fusion, and GIS-based map refinement techniques were tailored to pan-sharpened 0.61 m QuickBird imagery to develop a six-category urban land-cover map with 89.3 percent overall accuracy (k = 0.87). The study area was a rapidly developing 71.5 km2 part of suburban Raleigh, North Carolina, U.S.A., within the Neuse River basin. “Edge pixels” were a source of classification error as was spectral overlap between bare soil and impervious surfaces and among vegetated cover types. Shadows were not a significant source of classification error. These findings demonstrate that conventional spectral-based classification methods can be used to generate highly accurate maps of urban landscapes using high spatial resolution imagery. Copyright ASPRS Numéro de notice : A2008-123 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.74.4.463 En ligne : https://doi.org/10.14358/PERS.74.4.463 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29118
in Photogrammetric Engineering & Remote Sensing, PERS > vol 74 n° 4 (April 2008) . - pp 463 - 471[article]Geographic intention and modification in Web search / R. Jones in International journal of geographical information science IJGIS, vol 22 n° 3 (march 2008)
[article]
Titre : Geographic intention and modification in Web search Type de document : Article/Communication Auteurs : R. Jones, Auteur ; W. Zhang, Auteur ; B. Rey, Auteur ; et al., Auteur Année de publication : 2008 Article en page(s) : pp 229 - 246 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Infrastructure de données
[Termes IGN] données localisées
[Termes IGN] Etats-Unis
[Termes IGN] géomatique web
[Termes IGN] recherche d'information géographique
[Termes IGN] requête spatiale
[Termes IGN] toile d'araignée mondialeRésumé : (Auteur) Web searchers signal their geographic intent by using place-names in search queries. They also indicate their flexibility about geographic specificity by reformulating their queries. By examining this data we can learn to understand web searcher flexibility with respect to geographic intent. We examine aggregated data of queries with locations, and locations identified from IP addresses, to identify overall distance preferences, as well as distance preferences by search topic. We also examine query rewriting: both deliberate query rewriting, conducted in web search sessions, and automated query rewriting, with manual relevance judgments of geo-modified queries. We find geo-specification in 12.7% of user query rewrites in search sessions, and show the breakdown into sub-classes such as same-city, same-state, same-country and different-country. We also measure the dependence between US-state-name and distance-of-modified-location-from-original-location, finding that Vermont web searchers modify their locations greater distances than California web searchers. We find that automatically-modified queries are perceived as much more relevant when the geographic component is unchanged. We look at the relationship between the non-location part of a query and the distance from the user. We see that people search for child day-care near their locations and maps far from where they are located. We also give distance profiles for the top topics which cooccur with place-names in queries, which could be used to set document priors based on document proximity and query topic. Copyright Taylor & Francis Numéro de notice : A2008-137 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810701626186 En ligne : https://doi.org/10.1080/13658810701626186 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29132
in International journal of geographical information science IJGIS > vol 22 n° 3 (march 2008) . - pp 229 - 246[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 079-08021 RAB Revue Centre de documentation En réserve L003 Disponible 079-08022 RAB Revue Centre de documentation En réserve L003 Disponible Potential of Cartosat-1 images for topographic mapping / Costas Armenakis in Geomatica, vol 62 n° 1 (March 2008)
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Titre : Potential of Cartosat-1 images for topographic mapping Type de document : Article/Communication Auteurs : Costas Armenakis, Auteur ; Alexandre Beaulieu, Auteur Année de publication : 2008 Article en page(s) : pp 23 - 32 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie spatiale
[Termes IGN] carte topographique
[Termes IGN] Geomatica (logiciel)
[Termes IGN] image Cartosat-1
[Termes IGN] Leica Photogrammetry Suite
[Termes IGN] modèle numérique de surface
[Termes IGN] modèle par fonctions rationnelles
[Termes IGN] montagne
[Termes IGN] OrthoEngine
[Termes IGN] orthoimage
[Termes IGN] Socet Set
[Termes IGN] spatiotriangulation
[Termes IGN] Utah (Etas-Unis)Résumé : (Auteur) On prévoit que les données d'imagerie Cartosat-1 à résolution de 2,5 m auront des répercussions importantes sur les applications de cartographie topographique. Cette étude fournit une évaluation préliminaire des possibilités de cartographie des données d'imagerie Cartosat-1 dans un environnement de production cartographique utilisant les systèmes disponibles sur le marché. La région d'essai est située dans les montagnes Drum en Utah, aux États-Unis. L'évaluation est basée sur la triangulation photogrammétrique stéréo et par blocs en utilisant le modèle Rational Polynomial Functions (RPF) (fonctions polynomiales rationnelles) et le modèle satellitaire orbital physique 3D, la production de MNE et d'orthoimages ainsi que le contenu thématique des images. Les essais ont été réalisés en utilisant les systèmes suivants disponibles sur le marché : les versions 9.1.3 et 10.0.1 de PCI Geomatica-OrthoEngine sur Windows, la version 5.2.0 d'un poste de travail photogrammétrique numérique à capteurs multiples Socet Set sur Windows et la Leica Photogrammetric Suite (LPS), version 9.0. L'exactitude estimée de la stéréotriangulation est dans la fourchette de 0,8 à 1,4 pixel lors de l'utilisation du modèle satellitaire orbital physique 3D et dans l'éventail de 1,5 à 2 pixels lorsque le modèle RPF est utilisé. Pour le modèle RPF, on devrait tout au moins appliquer un raffinement de premier ordre ou de deuxième ordre de préférence. La triangulation par blocs, en utilisant le raffinement de premier ordre pour le modèle RPF afin d'ajuster une bande de deux images stéréos d'orbites adjacentes ont produit des exactitudes estimées à 3 à 4 pixels. Le MNE Cartosat-1 a produit une exactitude d'environ 2-3 m et l'orthoimage créée, une exactitude d'environ 2 m par rapport aux données de référence fournies. La qualité visuelle des images permet la détection et l'identification d'éléments topographiques, comme des routes et des patrons géomorphologiques. Copyright Geomatica Numéro de notice : A2008-279 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.5623/geomat-2008-0004 En ligne : https://cdnsciencepub.com/doi/abs/10.5623/geomat-2008-0004 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29272
in Geomatica > vol 62 n° 1 (March 2008) . - pp 23 - 32[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 035-08011 RAB Revue Centre de documentation En réserve L003 Disponible Land-cover change and environmental impact analysis in the Greater Mankato area of Minnesota using remote sensing and GIS modelling / F. Yuan in International Journal of Remote Sensing IJRS, vol 29 n°3-4 (February 2008)
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Titre : Land-cover change and environmental impact analysis in the Greater Mankato area of Minnesota using remote sensing and GIS modelling Type de document : Article/Communication Auteurs : F. Yuan, Auteur Année de publication : 2008 Article en page(s) : pp 1169 - 1184 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] aménagement du territoire
[Termes IGN] analyse diachronique
[Termes IGN] apprentissage automatique
[Termes IGN] carte d'occupation du sol
[Termes IGN] détection de changement
[Termes IGN] fusion d'images
[Termes IGN] image Quickbird
[Termes IGN] impact sur l'environnement
[Termes IGN] Minnesota (Etats-Unis)
[Termes IGN] photographie aérienne
[Termes IGN] planification urbaine
[Termes IGN] surface imperméable
[Termes IGN] système d'information géographique
[Termes IGN] urbanisationRésumé : (Auteur) Land use and land-cover (LULC) data provide essential information for environmental management and planning. This research evaluates the land-cover change dynamics and their effects for the Greater Mankato Area of Minnesota using image classification and Geographic Information Systems (GIS) modelling in high-resolution aerial photography and QuickBird imagery. Results show that from 1971 to 2003, urban impervious surfaces increased from 18.3% to 32.6%, while cropland and grassland decreased from 54.2% to 39.1%. The dramatic urbanization caused evident environmental impacts in terms of runoff and water quality, whereas the annual air pollution removal rate and carbon storage/sequestration remained consistent since urban forests were steady over the 32-year span. The results also indicate that highly accurate land-cover features can be extracted effectively from high-resolution imagery by incorporating both spectral and spatial information, applying an image-fusion technique, and utilizing the hierarchical machine-learning Feature Analyst classifier. This research fills the high-resolution LULC data gap for the Greater Mankato Area. The findings of the study also provide valuable inputs for local decision-makers and urban planners. Copyright Taylor & Francis Numéro de notice : A2008-008 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431160701294703 En ligne : https://doi.org/10.1080/01431160701294703 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29003
in International Journal of Remote Sensing IJRS > vol 29 n°3-4 (February 2008) . - pp 1169 - 1184[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 080-08021 RAB Revue Centre de documentation En réserve L003 Disponible People, pixels and weights in Vanderburgh County, Indiana: toward a new urban geography of human-environment interactions / E.W. Lafary in Geocarto international, vol 23 n° 1 (February - March 2008)
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Titre : People, pixels and weights in Vanderburgh County, Indiana: toward a new urban geography of human-environment interactions Type de document : Article/Communication Auteurs : E.W. Lafary, Auteur ; J.D. Gatrell, Auteur ; R.J. Jensen, Auteur Année de publication : 2008 Article en page(s) : pp 53 - 66 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] données socio-économiques
[Termes IGN] environnement
[Termes IGN] géographie urbaine
[Termes IGN] Indiana (Etats-Unis)
[Termes IGN] interaction homme-milieu
[Termes IGN] Normalized Difference Vegetation Index
[Termes IGN] régression géographiquement pondérée
[Termes IGN] système d'information géographiqueRésumé : (Auteur) This research examines the social-spatial dynamics of human-environment interactions in Evansville, Indiana, USA as well as the surrounding Vanderburgh County. Employing geographically weighted regression, this paper models the observed relationship between the Normalized Difference Vegetation Index (NDVI) and key sociodemographic parameters (housing value, median household income, percent of residents in poverty, population density and percent of population white). Further, this paper demonstrates that geographically weighted regression utilized within a GISci framework can be effectively used to visualize urban human-environment interactions and that the spatial distribution of environmental resources co-varies with socioeconomic conditions. Finally, the paper demonstrates that greenness indicators derived from remote sensing data can be used as proxy measures for observed sociodemographic variables. Copyright Taylor & Francis Numéro de notice : A2008-021 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/10106040701494575 Date de publication en ligne : 06/12/2007 En ligne : https://doi.org/10.1080/10106040701494575 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29016
in Geocarto international > vol 23 n° 1 (February - March 2008) . - pp 53 - 66[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 059-08011 RAB Revue Centre de documentation En réserve L003 Disponible Raster modelling of coastal flooding from sea-level rise / B. Poulter in International journal of geographical information science IJGIS, vol 22 n° 1-2 (february 2008)PermalinkLes scieurs américains face à un marché déprimé / Al Arter in Le Bois International : l'officiel du bois [édition verte], vol 2008 n° 2 (12 janvier 2008)PermalinkSeasonal sensitivity analysis of impervious surface estimation with satellite imagery / C. Wu in Photogrammetric Engineering & Remote Sensing, PERS, vol 73 n° 12 (December 2007)PermalinkDEM control in Arctic Alaska with Icesat laser altimetry / D.K. Atwood in IEEE Transactions on geoscience and remote sensing, vol 45 n° 11 Tome 2 (November 2007)PermalinkScanSAR-to-Stripmap mode interferometry processing using ENVISAT-ASAR Data / A.B. 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Weston in GIM international, vol 21 n° 4 (April 2007)PermalinkSupport 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)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)PermalinkRaster-network regionalization for watershed data processing / T.L. 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