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Improving web mapping with generalization / Julien Gaffuri in Cartographica, vol 46 n° 2 (June 2011)
[article]
Titre : Improving web mapping with generalization Type de document : Article/Communication Auteurs : Julien Gaffuri , Auteur Année de publication : 2011 Article en page(s) : pp 83 - 91 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique web
[Termes IGN] arc
[Termes IGN] architecture client-serveur
[Termes IGN] cartographie par internet
[Termes IGN] données vectorielles
[Termes IGN] généralisation à la volée
[Termes IGN] généralisation cartographique automatisée
[Termes IGN] serveur de données localisées
[Termes IGN] web mappingRésumé : (Auteur) Maps are not like other images. Internet maps could be improved through the use of automated mapping methods, particularly automated generalization techniques. Operational automated generalization systems exist, but they are not used on the Web. Integrating generalization and Web-mapping systems is an important challenge for Internet cartography; this integration requires that the architecture of existing Web-mapping systems be improved. This article gives some recommendations to progress toward this integration: spatial data servers should diffuse more vector data and fewer pre-computed raster tiles; they should be made “scale aware” and should provide multi-scale data; the generalization transformations should be shared between servers and clients; and Web-mapping clients should be able to compute dynamic graphic generalizations to adapt the spatial data display to the user's needs. Numéro de notice : A2011-230 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.3138/carto.46.2.83 Date de publication en ligne : 01/06/2011 En ligne : https://doi.org/10.3138/carto.46.2.83 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31008
in Cartographica > vol 46 n° 2 (June 2011) . - pp 83 - 91[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 031-2011021 RAB Revue Centre de documentation En réserve L003 Disponible Online visualization of 3D city model using CityGML and X3DOM / B. Mao in Cartographica, vol 46 n° 2 (June 2011)
[article]
Titre : Online visualization of 3D city model using CityGML and X3DOM Type de document : Article/Communication Auteurs : B. Mao, Auteur ; Yifang Ban, Auteur Année de publication : 2011 Article en page(s) : pp 109 - 114 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique web
[Termes IGN] Ajax
[Termes IGN] CityGML
[Termes IGN] modèle 3D de l'espace urbain
[Termes IGN] visualisation 3D
[Termes IGN] web mapping
[Termes IGN] X3DRésumé : (Auteur) This article proposes a novel framework for online visualization of 3D city models. CityGML is used to represent the city models, based on which 3D scenes in X3D are generated, then dynamically updated to the user side with AJAX and visualized in WebGL-supported browsers with X3DOM. The experimental results show that the proposed framework can easily be implemented using widely supported major browsers and can efficiently support online visualization of 3D city models in small areas. For the visualization of large volumes of data, generalization methods and multiple-representation data structure should be studied in future research. Numéro de notice : A2011-233 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.3138/carto.46.2.109 En ligne : https://doi.org/10.3138/carto.46.2.109 Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31011
in Cartographica > vol 46 n° 2 (June 2011) . - pp 109 - 114[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 031-2011021 RAB Revue Centre de documentation En réserve L003 Disponible Topologically consistent 3D city models obtained by extrusion / Hugo Ledoux in International journal of geographical information science IJGIS, vol 25 n° 4-5 (May 2011)
[article]
Titre : Topologically consistent 3D city models obtained by extrusion Type de document : Article/Communication Auteurs : Hugo Ledoux, Auteur ; Martijn Meijers, Auteur Année de publication : 2011 Article en page(s) : pp 557 - 574 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique
[Termes IGN] CityGML
[Termes IGN] intégrité topologique
[Termes IGN] modèle 3D de l'espace urbain
[Termes IGN] programmation par contraintes
[Termes IGN] Triangulated Irregular Network
[Termes IGN] triangulation de DelaunayRésumé : Auteur) One of the simplest methods to construct a 3D city model is to extrude building footprints to obtain “block-shaped" polyhedra representing buildings. While the method is well-known and easy to implement, if the 2D topological relationships between the footprints are not taken into account, the resulting 3D city models will not necessarily be topologically consistent (i.e. primitives shared by 3D buildings will be duplicated and/or intersect each others). As a result, the model will be of little use for most applications, besides visualisation that is. In this paper, we present a new extrusion procedure to construct topologically correct 3D city models. It is based on the use of a constrained triangulation, is conceptually simple, and offers great flexibility to create city models in different formats (e.g. CityGML or a surface-based representation). We have implemented the procedure, tested it with real-world datasets, and validated it. Numéro de notice : A2011-566 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1080/13658811003623277 En ligne : http://dx.doi.org/10.1080/13658811003623277 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=79398
in International journal of geographical information science IJGIS > vol 25 n° 4-5 (May 2011) . - pp 557 - 574[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 079-2011032 RAB Revue Centre de documentation En réserve L003 Disponible 079-2011031 SL Revue Centre de documentation Revues en salle Disponible Modelling and analysing 3D buildings with a primal/dual data structure / P. Boguslawski in ISPRS Journal of photogrammetry and remote sensing, vol 66 n° 2 (March - April 2011)
[article]
Titre : Modelling and analysing 3D buildings with a primal/dual data structure Type de document : Article/Communication Auteurs : P. Boguslawski, Auteur ; Christopher Gold, Auteur ; Hugo Ledoux, Auteur Année de publication : 2011 Article en page(s) : pp 188 - 197 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées
[Termes IGN] bati
[Termes IGN] CityGML
[Termes IGN] graphe
[Termes IGN] homologie
[Termes IGN] modèle topologique de données
[Termes IGN] modélisation 3D
[Termes IGN] structure de données localiséesRésumé : (Auteur) While CityGML permits us to represent 3D city models, its use for applications where spatial analysis and/or real-time modifications are required is limited since at this moment the possibility to store topological relationships between the elements is rather limited and often not exploited. We present in this paper a new topological data structure, the dual half-edge (DHE), which permits us to represent the topology of 3D buildings (including their interiors) and of the surrounding terrain. It is based on the idea of simultaneously storing a graph in 3D space and its dual graph, and to link the two. We propose Euler-type operators for incrementally constructing 3D models (for adding individual edges, faces and volumes to the model while updating the dual structure simultaneously), and we also propose navigation operators to move from a given point to all the connected planes or polyhedra for example. The DHE also permits us to store attributes to any element. We have implemented the DHE and have tested it with different CityGML models. Our technique allows us to handle important query types, for example finding the nearest exterior exit to a given room, as in disaster management planning. As the structure is locally modifiable the model may be adapted whenever a particular pathway is no longer available. The proposed DHE structure adds significant analytic value to the increasingly popular CityGML model. Numéro de notice : A2011-072 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2010.11.003 Date de publication en ligne : 28/12/2010 En ligne : https://doi.org/10.1016/j.isprsjprs.2010.11.003 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30853
in ISPRS Journal of photogrammetry and remote sensing > vol 66 n° 2 (March - April 2011) . - pp 188 - 197[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 081-2011021 SL Revue Centre de documentation Revues en salle Disponible Modelling and analysing 3D buildings with a primal/dual data structure / P. Boguslawski in ISPRS Journal of photogrammetry and remote sensing, vol 66 n° 2 (March - April 2011)
[article]
Titre : Modelling and analysing 3D buildings with a primal/dual data structure Type de document : Article/Communication Auteurs : P. Boguslawski, Auteur ; Christopher Gold, Auteur ; Hugo Ledoux, Auteur Année de publication : 2011 Article en page(s) : 17 p. Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées
[Termes IGN] bati
[Termes IGN] carte d'intérieur
[Termes IGN] CityGML
[Termes IGN] données localisées 3D
[Termes IGN] graphe
[Termes IGN] modèle topologique de données
[Termes IGN] relation topologiqueRésumé : (Auteur) While CityGML permits us to represent 3D city models, its use for applications where spatial analysis and/or real-time modifications are required is limited since at this moment the possibility to store topological relationships between the elements is rather limited and often not exploited. We present in this paper a new topological data structure, the dual half-edge (DHE), which permits us to represent the topology of 3D buildings (including their interiors) and of the surrounding terrain. It is based on the idea of simultaneously storing a graph in 3D space and its dual graph, and to link the two. We propose Euler-type operators for incrementally constructing 3D models (for adding individual edges, faces and volumes to the model while updating the dual structure simultaneously), and we also propose navigation operators to move from a given point to all the connected planes or polyhedra for example. The DHE also permits us to store attributes to any element. We have implemented the DHE and have tested it with different CityGML models. Our technique allows us to handle important query-types, for example finding the nearest exterior exit to a given room, as in disaster management planning. As the structure is locally modifiable the model may be adapted whenever a particular pathway is no longer available. The proposed DHE structure adds significant analytic value to the increasingly popular CityGML model. Numéro de notice : A2011-554 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2010.11.003 Date de publication en ligne : 28/12/2010 En ligne : https://doi.org/10.1016/j.isprsjprs.2010.11.003 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31448
in ISPRS Journal of photogrammetry and remote sensing > vol 66 n° 2 (March - April 2011) . - 17 p.[article]Réservation
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