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Utilizing a discrete global grid system for handling point clouds with varying locations, times, and levels of detail / Neeraj Sirdeshmukh in Cartographica, vol 54 n° 1 (Spring 2019)  

Public [article]  inCartographica > vol 54 n° 1 (Spring 2019) . - pp 4 - 15 Titre : Utilizing a discrete global grid system for handling point clouds with varying locations, times, and levels of detail Type de document : Article/Communication Auteurs : Neeraj Sirdeshmukh, Auteur ; Edward Verbree, Auteur ; Peter J. M. Van Oosterom, Auteur ; Stella Psomadaki, Auteur ; Martin Kodde, Auteur Année de publication : 2019 Article en page(s) : pp 4 - 15 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique web [Termes IGN] base de données localisées [Termes IGN] données lidar [Termes IGN] données localisées 3D [Termes IGN] indexation spatiale [Termes IGN] projection [Termes IGN] semis de points [Termes IGN] système de coordonnées [Termes IGN] système de grille globale discrète [Termes IGN] visualisation de données [Termes IGN] zoom Résumé : (Auteur) Discrete global grid systems (DGGSs) have emerged in recent years as a new specification for working with global heterogeneous data sets in a Digital Earth framework. Point clouds originating from different sources usually have varying initial characteristics. This research aims to analyze to what extent a DGGS can be used to handle point clouds having varying coordinate systems, acquired at different levels of detail (densities), and at different times in the creation of a global map of point clouds. DGGSs, which are currently limited to a 2D (surface) space, are extended into 3D and 4D spaces to fully harness the multidimensional nature of point clouds. A continuous spatial indexing strategy, based on a space-filling curve, is then developed on an ellipsoidal model of the Earth and used to efficiently cluster and retrieve DGGS-based point clouds stored in a database. Finally, the queried points are visualized in a Web browser. The hierarchical, multi-resolution nature of a DGGS is exploited to achieve a variable-scale smooth-zoom visualization. The challenges and opportunities of point cloud integration in a DGGS are presented. Numéro de notice : A2019-433 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.3138/cart.54.1.2018-0009 Date de publication en ligne : 28/03/2019 En ligne : https://doi.org/10.3138/cart.54.1.2018-0009 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=92759 [article]

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031-2019011	SL	Revue	Centre de documentation	Revues en salle	Disponible

Toward seamless indoor-outdoor applications : developing stakeholder-oriented location-based services / K. Ogawa in Geo-spatial Information Science, vol 14 n° 2 (01/06/2011)  

Public [article]  inGeo-spatial Information Science > vol 14 n° 2 (01/06/2011) . - pp 109 - 118 Titre : Toward seamless indoor-outdoor applications : developing stakeholder-oriented location-based services Type de document : Article/Communication Auteurs : K. Ogawa, Auteur ; Edward Verbree, Auteur ; Sisi Zlatanova, Auteur ; et al., Auteur Année de publication : 2011 Article en page(s) : pp 109 - 118 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Navigation et positionnement [Termes IGN] acteur [Termes IGN] architecture de système [Termes IGN] continuité géographique [Termes IGN] OpenLS [Termes IGN] positionnement en intérieur [Termes IGN] service fondé sur la position [Termes IGN] standard OGC Résumé : (Auteur) Location-Based Services (LBS), an emerging new business based on smartphone and mobile networks, are becoming more and more popular. Most of these LBSs, however, only offer non-seamless indoor/outdoor applications and simple applications without giving stakeholders the chance to play an active role. Our specific aim is to solve these issues. This paper presents concepts to solve these issues by expanding the Open Location Services Interface Standard (OpenLS) to allow seamless indoor/outdoor positioning and to extend the content of the services to include information recommended by stakeholders. Numéro de notice : A2011-626 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : 10.1007/s11806-011-0469-0 Date de publication en ligne : 14/08/2012 En ligne : https://doi.org/10.1007/s11806-011-0469-0 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=33598 [article]

Towards a 3D feature overlay through a tetrahedral mesh data structure / Edward Verbree in Cartography and Geographic Information Science, vol 32 n° 4 (October 2005)  

Public [article]  inCartography and Geographic Information Science > vol 32 n° 4 (October 2005) . - pp 303 - 314 Titre : Towards a 3D feature overlay through a tetrahedral mesh data structure Type de document : Article/Communication Auteurs : Edward Verbree, Auteur ; A. Van Der Most, Auteur ; W. Quak, Auteur ; Peter J. M. Van Oosterom, Auteur Année de publication : 2005 Article en page(s) : pp 303 - 314 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées [Termes IGN] géomètrie algorithmique [Termes IGN] objet géographique 3D [Termes IGN] structure de données localisées [Termes IGN] superposition [Termes IGN] tessellation Résumé : (Auteur) The use of 3D features within GIS bas been increasing due to the need to represent, query, manipulate, and analyse man-made objects in relationship to other 3D features related to the surface of the earth. This will yield an increased use of 3D boundary representations of the features. The spatial relationship between two or more features is often evaluated using a geometrical overlay of these features, which reveals whether these features overlap and-if they do-to which extent. We present the design of a 3D overlay algorithm which overlays 3D triangulated boundary representations through a constrained tetrahedral mesh. The intersections between the constrained facets of the 3D features are calculated on the fly and within a restricted neighbourhood. We can identify and reconstruct the overlaid parts of the 3D boundary representation within the tetrahedral mesh. The implementation is based on the Computational Geometry Algorithms Library, which proved to have the functionality needed but also has its limitations. Numéro de notice : A2005-534 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1559/152304005775194791 En ligne : https://doi.org/10.1559/152304005775194791 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27670 [article]

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032-05041	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Virtualising the 3D real world (3): KARMA-VL, 4D GIS and virtual reality for urban planning / G. Van Maren in GIM international, vol 14 n° 6 (June 2000)

Public [article]  inGIM international > vol 14 n° 6 (June 2000) . - 4 p. ; pp 34 - 37 Titre : Virtualising the 3D real world (3): KARMA-VL, 4D GIS and virtual reality for urban planning Type de document : Article/Communication Auteurs : G. Van Maren, Auteur ; Edward Verbree, Auteur Année de publication : 2000 Article en page(s) : 4 p. ; pp 34 - 37 Note générale : Bibliographie 5 ref Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image [Termes IGN] dimension temporelle [Termes IGN] langage de modélisation [Termes IGN] planification urbaine [Termes IGN] réalité virtuelle [Termes IGN] SIG 4D [Termes IGN] système d'information géographique [Termes IGN] visualisation 3D Résumé : (Auteur) The current use of Virtual Reality is often restricted to high-end, real-time visualisation. The authors show that it is possible to incorporate the other functions by integrating existing GIS, CAD and VR tools. The aim of the Karma-vl system, developed and built by the authors, is to support the whole process of design planning for urban settings with one system. Here, the multiple view and data-representation approach of karma-vl is emphasised. Applications for virtual harvest planning and real-time streaming animation are demonstrated. Numéro de notice : A2000-205 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=21621 [article]

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061-00061	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Interaction in virtual world views : linking 3D GIS with VR / Edward Verbree in International journal of geographical information science IJGIS, vol 13 n° 4 (July 1999)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 13 n° 4 (July 1999) . - pp 385 - 396 Titre : Interaction in virtual world views : linking 3D GIS with VR Type de document : Article/Communication Auteurs : Edward Verbree, Auteur ; G. Van Maren, Auteur ; R. Germs, Auteur ; Friedhelm Jansen, Auteur ; Menno-Jan Kraak, Auteur Année de publication : 1999 Article en page(s) : pp 385 - 396 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes d'information géographique [Termes IGN] réalité virtuelle [Termes IGN] SIG 3D [Termes IGN] visualisation 3D [Termes IGN] vue 3D Résumé : (Auteur) To support 3D GIS interaction within VR-environments we propose a multi-view approach based on three types of visualization: plan view, model view and world view. The visualization in these views ranges from a conventional map, through a partly symbolic and simplified 3D representation to a full immersive and photo-realistic 3D display. The views can be used simultaneously or intermittently, and each provides a repertoire of interaction possibilities that are apt-but not necessarily limited-to that view. We are currently developing a 3D GIS&VR system (Karma VI) based on existing GIS and VR technology that uses the three views to support the design, development and presentation of large infrastructure plans in The Netherlands. Operational use of this system showed that the multi-view approach leads to a more sophisticated understanding of those plans. Numéro de notice : A1999-086 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1080/136588199241265 En ligne : https://doi.org/10.1080/136588199241265 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26291 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
079-99041	RAB	Revue	Centre de documentation	En réserve L003	Disponible