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Titre : Extracting outlined planar clusters of street facades from 3D point clouds Type de document : Article/Communication Auteurs : Karim Hammoudi , Auteur ; Fadi Dornaika , Auteur ; Bahman Soheilian , Auteur ; Nicolas Paparoditis , Auteur Editeur : New-York : IEEE Computer society Année de publication : 2010 Conférence : CVR 2010, Canadian Conference on Computer and Robot Vision 31/05/2010 02/06/2010 Ottawa Ontario - Canada Proceedings IEEE Importance : pp 122 - 129 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] données lidar
[Termes IGN] données localisées 3D
[Termes IGN] extraction automatique
[Termes IGN] façade
[Termes IGN] Paris (75)
[Termes IGN] plan (géométrie)
[Termes IGN] scène urbaine
[Termes IGN] transformation de HoughRésumé : (auteur) This paper presents an approach for extracting 3D outlined planar clusters of street facades. Terrestrial laser data are acquired using a Mobile Mapping System (MMS). Mapping of street facades is of great interest in various digital mapping and robotic research topics. After a filtering step of the 3D point cloud, the dominant hypothetical facade planes are detected using an adapted Progressive Probabilistic Hough Transform (PPHT). The corresponding planar clusters are extracted using a priori geometric knowledge of street. The clusters are horizontally and vertically delimited using heuristic approaches. The adapted PPHT allows the automatic extraction of georeferenced planar clusters of facades with a fine detection of dominant facade lines and a low computation time. The adopted approach has been tested on a set of point cloud acquired in the city of Paris under real conditions. Examples and experimental results show the efficiency and the potential of the proposed approach. Numéro de notice : C2010-058 Affiliation des auteurs : MATIS+Ext (1993-2011) Thématique : IMAGERIE Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : 10.1109/CRV.2010.23 En ligne : https://doi.ieeecomputersociety.org/10.1109/CRV.2010.23 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=101650
Titre : Validation of Planar Partitions Using Constrained Triangulation Type de document : Article/Communication Auteurs : Hugo Ledoux, Auteur ; Martijn Meijers, Auteur Editeur : International Society for Photogrammetry and Remote Sensing ISPRS Année de publication : 2010 Collection : International Archives of Photogrammetry, Remote Sensing and Spatial Information Sciences, ISSN 1682-1750 num. 38-2 Conférence : ISPRS 2010, Commission 2, Joint International Conference on Theory, Data Handling and Modelling 26/05/2010 28/05/2010 Hong Kong Hong Kong OA ISPRS Archives Importance : 6 p. Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées
[Termes IGN] cohérence géométrique
[Termes IGN] cohérence logique
[Termes IGN] graphe planaire
[Termes IGN] partition
[Termes IGN] polygone
[Termes IGN] tessellation
[Termes IGN] triangulation de DelaunayRésumé : (auteur) Planar partitions—full tessellations of the plane into non-overlapping polygons—are frequently used in GIS to model concepts such as land cover, cadastral parcels or administrative boundaries. Since in practice planar partitions are often stored as a set of individual objects (polygons) to which attributes are attached (e.g. stored with a shapefile), and since different errors/mistakes can be introduced during their construction, manipulation or exchange, several inconsistencies will often arise in practice. The inconsistencies are for instance overlapping polygons, gaps and unconnected polygons. We present in this paper a novel algorithm to validate such planar partitions. It uses a constrained triangulation as a support for the validation, and permits us to avoid different problems that arise with existing solutions based on the construction of a planar graph. We describe in the paper the details of our algorithm, our implementation, how inconsistencies can be detected, and the experiments we have made with real-world data (the CORINE2000 dataset). Numéro de notice : 14814 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Communication DOI : sans En ligne : http://www.isprs.org/proceedings/XXXVIII/part2/Papers/24_Paper.pdf Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=73994 Modelling the erectheion: extracting information from very large datasets / J. Beraldin in GIM international, vol 23 n° 11 (November 2009)
[article]
Titre : Modelling the erectheion: extracting information from very large datasets Type de document : Article/Communication Auteurs : J. Beraldin, Auteur Année de publication : 2009 Article en page(s) : pp 13 - 17 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image
[Termes IGN] données localisées 3D
[Termes IGN] image à haute résolution
[Termes IGN] jeu de données localisées
[Termes IGN] lasergrammétrie
[Termes IGN] modélisation 3D
[Termes IGN] monument historique
[Termes IGN] photogrammétrie numérique
[Termes IGN] polygone
[Termes IGN] reconstruction 3D
[Termes IGN] reconstruction d'objet
[Termes IGN] résolution multiple
[Termes IGN] télémétrie laser terrestre
[Termes IGN] texturage
[Termes IGN] visualisation 3DRésumé : (Auteur) Modern terrestrial laser scanners (TLS) generate between 10 and 50 million 3D coordinates per minutes : about 500Mbytes of data. Together with high-resolution images for texturing purposes, this is enough information to choke high-end PCs running commercial software. The National Research Council in Canada has developped a framework for extracting information from very large TLS and imagery datasets, an evolution demonstrated in the Erechtheion project. This monument has been modelled in the 3D to a spatial resolution of 2mm. The fully textured 3D model containing 348 million polygons can be interactively visualised and analysed in real time. Copyright Reed Business Numéro de notice : A2009-436 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30067
in GIM international > vol 23 n° 11 (November 2009) . - pp 13 - 17[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 061-09111 RAB Revue Centre de documentation En réserve L003 Disponible SIG et cartographie pour MacIntosh / Anonyme in Géomatique expert, n° 71 (octobre - novembre 2009)
[article]
Titre : SIG et cartographie pour MacIntosh Type de document : Article/Communication Auteurs : Anonyme, Auteur Année de publication : 2009 Article en page(s) : pp 42 - 45 Langues : Français (fre) Descripteur : [Termes IGN] arc
[Termes IGN] logiciel SIG
[Termes IGN] MacMap
[Termes IGN] polygone
[Termes IGN] réseau routier
[Termes IGN] segment de droiteRésumé : (Editeur) La société Carte Blanche Conseil, spécialiste de l'information trafic, a eu très tôt besoin d'un SIG pour localiser les tronçons de voirie. Elle a acquis un logiciel tournant sur MacIntosh, MacMap®, qu'elle continue à faire évoluer depuis la faillite de son premier éditeur. Numéro de notice : IFN_4782 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=72884
in Géomatique expert > n° 71 (octobre - novembre 2009) . - pp 42 - 45[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 265-09061 RAB Revue Centre de documentation En réserve L003 Disponible IFN-001-P000688 RAB Revue Nogent-sur-Vernisson En réserve L003 Exclu du prêt Multihulls: Spatial representation and processing with variable shape fidelity, applied to gazetteers / J.T. Hastings in Transactions in GIS, vol 13 n°5-6 (October/december 2009)
[article]
Titre : Multihulls: Spatial representation and processing with variable shape fidelity, applied to gazetteers Type de document : Article/Communication Auteurs : J.T. Hastings, Auteur Année de publication : 2009 Article en page(s) : pp 465 - 480 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique
[Termes IGN] ensemble convexe
[Termes IGN] figure géométrique
[Termes IGN] géocodage
[Termes IGN] raisonnement spatial
[Termes IGN] recherche d'information géographique
[Termes IGN] répertoire toponymique
[Termes IGN] système d'information géographique
[Termes IGN] toponymeRésumé : (Auteur) Spatial processing is increasingly prevalent in the modern computing milieu. In particular, geographic information retrieval and location-based services such as GoogleEarth and MapQuest depend on spatial operations in conjunction with gazetteers to georeference geographic features. However, many gazetteers contain only point locations or simple bounding rectangles, which make for erratic and sometimes poor georeferencing. Convex hulls can provide better georeferencing results at modest computational cost, but their shape fidelity is still erratic. Full GIS capabilities are actually overfit for many geospatial and georeferencing purposes, because of the limited accuracy of the underlying data. The financial and technical demands of GIS also exclude it from many markets. Described here is a new technique, multihulls, based on the iterative refinement of convex hulls. Multihulls achieve arbitrary shape fidelity at a small increment in computational cost, consistent with the data, outside a GIS, making them attractive for many geospatial and georeferencing applications, especially gazetteers. Copyright Blackwell Publishing Numéro de notice : A2009-524 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/j.1467-9671.2009.01174.x En ligne : https://doi.org/10.1111/j.1467-9671.2009.01174.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30153
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