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Learning with transductive SVM for semisupervised pixel classification of remote sensing imagery / Ujjwal Maulik in ISPRS Journal of photogrammetry and remote sensing, vol 77 (March 2013)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 77 (March 2013) . - pp 66 - 78 Titre : Learning with transductive SVM for semisupervised pixel classification of remote sensing imagery Type de document : Article/Communication Auteurs : Ujjwal Maulik, Auteur ; Debasis Chakraborty, Auteur Année de publication : 2013 Article en page(s) : pp 66 - 78 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique [Termes IGN] Bombay [Termes IGN] classification par séparateurs à vaste marge [Termes IGN] classification pixellaire [Termes IGN] classification semi-dirigée [Termes IGN] image infrarouge couleur [Termes IGN] image SPOT [Termes IGN] Inde [Termes IGN] ville Résumé : (Auteur) Land cover classification using remotely sensed data requires robust classification methods for the accurate mapping of complex land cover area of different categories. In this regard, support vector machines (SVMs) have recently received increasing attention. However, small number of training samples remains a bottleneck to design suitable supervised classifiers. On the other hand, adequate number of unlabeled data is available in remote sensing images which can be employed as additional source of information about margins. To fully leverage all of the precious unlabeled data, integration of filtering in a transductive SVM is proposed. Using two labeled image datasets of small size and two large unlabeled image datasets, the effectiveness of the proposed method is explored. Experimental results show that the proposed technique achieves average overall accuracies of around 4.5–7.8%, 0.8–2.6% and 0.9–2.2% more than the standard inductive SVM (ISVM), progressive transductive SVM (PTSVM) and low density separation (LDS) classifiers, respectively on larger domains in case of labeled datasets. Using image datasets, visual interpretation from the classified images as well as the segmentation quality reveal that the proposed method can efficiently filter informative data from the unlabeled samples. Numéro de notice : A2013-116 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2012.12.003 En ligne : https://doi.org/10.1016/j.isprsjprs.2012.12.003 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32254 [article]

Exemplaires(1)

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081-2013031	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Quality evaluation of 3D city building models with automatic error diagnosis / Jean-Christophe Michelin (2013)  

Public Titre : Quality evaluation of 3D city building models with automatic error diagnosis Type de document : Article/Communication Auteurs : Jean-Christophe Michelin , Auteur ; Julien Tierny, Auteur ; Florence Tupin, Auteur ; Clément Mallet , Auteur ; Nicolas Paparoditis , Auteur Editeur : International Society for Photogrammetry and Remote Sensing ISPRS Année de publication : 2013 Collection : International Archives of Photogrammetry, Remote Sensing and Spatial Information Sciences, ISSN 1682-1750 num. 40-7/W2 Conférence : ISPRS 2013, TCII, III, IV, VII -SSG 11/11/2013 17/11/2013 Antalya Turquie OA ISPRS Archives Importance : pp 161 - 166 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques [Termes IGN] détection d'erreur [Termes IGN] diagnostic [Termes IGN] évaluation des données [Termes IGN] extraction de traits caractéristiques [Termes IGN] image aérienne [Termes IGN] information sémantique [Termes IGN] modèle 3D de l'espace urbain [Termes IGN] modèle numérique du bâti [Termes IGN] modélisation 3D du bâti BIM [Termes IGN] qualité des données [Termes IGN] reconstruction 3D du bâti [Termes IGN] ville [Termes IGN] zone urbaine Résumé : (auteur) Automatic building modelling allows a cost effective access to 3D semantic information of cities. However, even state-of-the-art algorithms have intrinsic limits and many errors exist in 3D reconstructions, requiring expensive manual corrections. A new approach is proposed in this paper for the automatic diagnosis of 3D building databases in urban areas. A novel error taxonomy which allows a subsequent high-level diagnosis is first proposed. Then, relevant raster and vector features are extracted from very high resolution multi-view images and Digital Surface Models so as that to retrieve such errors. In a supervised way, a set of functions is presented in order to take high-level decisions from these low-level features. Experiments on 355 buildings in an European dense city center with 10 cm airborne images demonstrate the high accuracy on error detection and show promising results. Numéro de notice : C2013-061 Affiliation des auteurs : LASTIG MATIS+Ext (2012-2019) Thématique : IMAGERIE/INFORMATIQUE/URBANISME Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : 10.5194/isprsarchives-XL-7-W2-161-2013 Date de publication en ligne : 29/10/2013 En ligne : http://dx.doi.org/10.5194/isprsarchives-XL-7-W2-161-2013 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=98510

Very high resolution urban land cover extraction using airborne hyperspectral images / Arnaud Le Bris (April 2013) 

Public Titre : Very high resolution urban land cover extraction using airborne hyperspectral images Type de document : Article/Communication Auteurs : Arnaud Le Bris , Auteur ; Nesrine Chehata , Auteur ; Xavier Briottet , Auteur ; Nicolas Paparoditis , Auteur Editeur : Paris : European Association of Remote Sensing Laboratories EARSEL Année de publication : April 2013 Conférence : EARSeL 2013, 8th Imaging Spectrometry Workshop 08/04/2013 10/04/2013 Nantes France OA ISPRS Archives Importance : 8 p. Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique [Termes IGN] caméra numérique [Termes IGN] capteur aérien [Termes IGN] classification [Termes IGN] image hyperspectrale [Termes IGN] image multibande [Termes IGN] milieu urbain [Termes IGN] occupation du sol [Termes IGN] ville Résumé : (auteur) During last decade, needs for high resolution land cover data have been growing. Such knowledge is namely often required in environment monitoring studies. Thus, to answer these needs, national mapping or environment agencies, in many countries, have undertaken the production of such large scale national land cover database. Nevertheless, these databases provide a general classification and may not suit some specific (often new) applications requiring a semantic or geometric finer level of details. That is to say that, on one hand, additional land cover classes should sometimes be specified, whereas, on the other hand, some existing classes should be delineated at a finer level. More particularly, in urban areas, knowledge concerning very high resolution land cover and especially material classification are necessary for several city modelling applications. Most of these applications are still experimental scientific ones in various fields such as micro-meteorology, hydrology, pollutants flow monitoring and ground perviousness monitoring. Thus, knowledge concerning the roofing materials or the different kinds of ground areas (pervious, vegetated, impervious…) are required. Airborne remote sensing techniques appear to be convenient for providing such information at a large scale since no existing map contains such information. However, remote sensing imagery of urban environments from airborne acquisitions namely still remains a major scientific issue, since on one hand, urban areas are characterized by a high variety of materials, and on the other hand, results provided by most of the traditional processing methods based on usual red-green-blue-near infrared multispectral images remain limited for such applications. A possible way to improve classification results is to enhance the imagery spectral resolution using superspectral or hyperspectral imagery. Thus, the present experiments are part of a work aiming at designing a future superspectral camera system dedicated to high resolution urban land cover classification applications, and especially material mapping. The choice of optimal band sets will here be processed from a set of airborne hyperspectral data. A data acquisition campaign named UMBRA has recently been carried out thanks to the French collaboration of IGN and ONERA. Data have been captured over two French cities chosen for their difference in building architecture, urbanization planning and their variety in urban material. Airborne images have been acquired simultaneously by multispectral and hyperspectral cameras with a ground sampling distance ranging from 0.12m for multispectral to 1.6m for hyperspectral in the SWIR channels. The images were radiometrically and geometrically calibrated and have a noticeable low signal-to-noise ratio. The first urban land cover / material classification results obtained from this new reference data set will be presented in this paper. Numéro de notice : C2013-043 Affiliation des auteurs : LASTIG MATIS+Ext (2012-2019) Thématique : IMAGERIE Nature : Communication nature-HAL : ComSansActesPubliés-Unpublished DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=80250

Documents numériques

en open access Very high resolution urban land cover extraction Adobe Acrobat PDF

3D online: Crowdsourcing for city planning / E. Jeansson in GIM international, vol 26 n° 12 (December 2012)  

Public [article]  inGIM international > vol 26 n° 12 (December 2012) . - pp 28 - 31 Titre : 3D online: Crowdsourcing for city planning Type de document : Article/Communication Auteurs : E. Jeansson, Auteur ; E. Tellden, Auteur ; K. Farmanbar, Auteur Année de publication : 2012 Article en page(s) : pp 28 - 31 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique web [Termes IGN] aménagement urbain [Termes IGN] données localisées des bénévoles [Termes IGN] participation du public [Termes IGN] planification urbaine [Termes IGN] production participative [Termes IGN] SIG participatif [Termes IGN] Suède [Termes IGN] système d'information géographique [Termes IGN] ville Résumé : (Auteur) City planning is a complex process of combining various aspects and analysing the impact of changes in order to create a sustainable city. It involves the municipality, politicians, external stakeholders and, not least, citizens themselves. The potential cost of planning mistakes or late changes to project underlines the need for efficient communication, both within project teams and to external stakeholders. Meanwhile, the importance of citizen's support and involvement is still underestimated in city planning. This article examines how several Swedish cities are encouraging public involvement through crowdsoucing. Numéro de notice : A2012-660 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/SOCIETE NUMERIQUE Nature : Article DOI : sans En ligne : http://www.gim-international.com/issues/ Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32106 [article]

Exemplaires(1)

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061-2012121	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Synthesizing urban remote sensing through application, scale, data and case studies / E.A. Wentz in Geocarto international, vol 27 n° 5 (August 2012)  

Public [article]  inGeocarto international > vol 27 n° 5 (August 2012) . - pp 425 - 442 Titre : Synthesizing urban remote sensing through application, scale, data and case studies Type de document : Article/Communication Auteurs : E.A. Wentz, Auteur ; D.A. Quattrochi, Auteur ; M. Netzband, Auteur ; S.W. Myint, Auteur Année de publication : 2012 Article en page(s) : pp 425 - 442 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique [Termes IGN] Atlanta (Géorgie) [Termes IGN] chaleur [Termes IGN] classification barycentrique [Termes IGN] classification ISODATA [Termes IGN] image Landsat-MSS [Termes IGN] image Landsat-TM [Termes IGN] image Quickbird [Termes IGN] image Terra-ASTER [Termes IGN] milieu urbain [Termes IGN] Phoenix [Termes IGN] ville Résumé : (Auteur) This article describes the outcomes of an international workshop on urban remote sensing. The workshop synthesized the needs of remote sensing scientists to better monitor and analyse urban physical and social dynamics. The workshop was held with urban land use forecasting workshop in April 2011 in Arizona. The four major themes of the jointly held workshops were application, data, scale and case studies. Application refers to how data are used to address urban problems. Data refers to the sources and types of raw data available. Scale is the ever-present concern over data reduction and resolution. Case studies examine a single urban area, typically based on one or two primary themes. One outcome was to integrate multiple case studies to form an urban typology. To respond to this need, this article integrates two case studies on the urban heat island in Atlanta, GA and Phoenix, AZ based on the four themes. Numéro de notice : A2012-372 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/10106049.2012.687400 Date de publication en ligne : 24/05/2012 En ligne : https://doi.org/10.1080/10106049.2012.687400 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31818 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
059-2012051	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Towards sustainable land management in Serbia: the story of Cacak's webGIS rollout / H. Müller in GIM international, vol 26 n° 7 (July 2012)

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Prise en compte des risques naturels / CERTU Pôle géomatique (2012) 

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La modélisation 3D : une nouvelle voie pour les documents d'urbanisme : Application à l'optimisation énergétique des bâtiments / Aurélie Prévost in Revue internationale de géomatique, vol 21 n° 4 (décembre 2011 – février 2012)  

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Ondelettes et théorie des évidences pour la classification orientée-objet : Caractérisation et suivi des changements d’occupation des sols de la métropole de Rennes / A. Lefebvre in Revue internationale de géomatique, vol 21 n° 3 (septembre - novembre 2011)  

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Conception et déploiement d’un géoframework multi-composante pour la gestion du risque d’inondation en zones urbaines : Application à la ville de Megrine / Mohamed Missaoui in Revue internationale de géomatique, vol 21 n° 2 (juin - août 2011)  

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Impervious surface area extraction from IKONOS imagery using an object-based fuzzy method / Xuefei Hu in Geocarto international, vol 26 n° 1 (February 2011)  

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Building a modern GIS for an ancient city / A. Stocking in Geoinformatics, vol 13 n° 4 (01/06/2010)

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Topographie et climatologie urbaine / G. Najjar in XYZ, n° 123 (juin - août 2010)

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Urban growth monitoring using remote sensing and geographic information system: a case study in the Twin Cities metropolitain area, Minnesota / F. Yuan in Geocarto international, vol 25 n° 3 (June 2010)  

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Using spatial analysis and geovisualization to reveal urban changes: Milan, Italy, 1737-2005 / M. Tucci in Cartographica, vol 45 n° 1 (March 2010)  

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Augmented reality and photogrammetry: a synergy to visualize physical and virtual city environments / Cristina Portales in ISPRS Journal of photogrammetry and remote sensing, vol 65 n° 1 (January - February 2010)  

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Bilan planète n° 2 : Les villes / Jules Grandin (2010)

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Un système multi-agent pour la simulation des dynamiques urbaines / Julien Perret (2010)  

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3D builbing reconstruction from lidar based on a cell decomposition approach / Martin Kada (01/12/2009)  

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De la géométrie des réseaux viaires à l'organisation spatiale intra-urbaine : une approche de la comparaison des formes de villes par la simulation orientée agents / Thomas Louail in Revue internationale de géomatique, vol 19 n° 4 (décembre 2009 – février 2010)  

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A new algorithm for distance cartogram construction / E. Shimizu in International journal of geographical information science IJGIS, vol 23 n°11-12 (november 2009)  

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Les citadins et la forêt en France / Anne-Marie Granet in Revue forestière française, vol 61 n° 5 (septembre - octobre 2009)  

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Amélioration de la carte d'occupation du sol par la fusion d'images satellitaires multi-échelle : Application au milieu urbain et périurbain de la région / R. Khedam in Revue internationale de géomatique, vol 19 n° 1 (mars – mai 2009)  

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Automated urban land use and land classification for mesoscale atmospheric modeling over cities / André Leroux in Geomatica, vol 63 n° 1 (March 2009)  

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Et si le rayonnement des villes passait par le web / Françoise de Blomac in SIG la lettre, n° 105 (mars 2009)

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