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Cristage: A 3D GIS with a logical crystallographic layer to enable complex analyses / Benoit Poupeau (2006)  

Public Titre : Cristage: A 3D GIS with a logical crystallographic layer to enable complex analyses Type de document : Article/Communication Auteurs : Benoit Poupeau , Auteur ; Olivier Bonin , Auteur Editeur : Berlin, Heidelberg, Vienne, New York, ... : Springer Année de publication : 2006 Collection : Lecture notes in Geoinformation and Cartography, ISSN 1863-2246 Conférence : 3D-GIS 2006, Innovations in 3D Geo Information Systems 07/08/2006 08/08/2006 Kuala Lumpur Malaisie Proceedings Springer Importance : pp 225 - 234 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale [Termes IGN] modèle géométrique [Termes IGN] modèle topologique de données [Termes IGN] objet géographique [Termes IGN] SIG 3D Résumé : (auteur) Researches on 3D GIS have mainly focused on the geometrical and topological modeling of objects to ensure data coherence and correct visualization (Molenaar, 1992; Pilouk, 1996; Zlatanova, 2000). While well suited to applications where visualization is important (urban planning, estate market...), these models are not suited to compute complex queries such as the propagation of a natural phenomenon (e.g. roof collapsing in a quarry). This paper presents Cristage (Poupeau, 2006), a 3D GIS prototype, that enables to perform complex analyses. Cristage is composed of two layers. The first layer deals with data coherence, visualization and computation of simple volumic queries (intersection, inclusion). It relies on Zlatanova’s SSM (Zlatanova, 2000) and a spatial enumeration of objects by tetrahedrons. The second level is a logical layer on which analyzes are performed. Each geographical object is abstracted by one or several crystals and is embedded in a 3D mesh. Mesh adjacencies are stored in this level. These adjacencies are purely topological: they correspond to adjacencies between the real geographical features, and not necessarily between their geometrical representations. An adjacency is described in Cristage by a “contact object”, which is a 2-Cell that bounds two 3-Cells (a 3-Cell is the topological representation of a crystal). To study geographical phenomena, we add to “contact objects” of interest a semantic information. Then a “coupling object” gathers a set of “contact objects” (topologically associated to a cell-tuple). It represents a 2D geographical object that structures 3D space. Thus, DTM, faults or stratigraphic joints are “coupling objects”. The logical layer of Cristage with “coupling objects” constitutes the basis to perform spatial analysis and to assess phenomena propagation (Bonin, 2006). Numéro de notice : C2006-045 Affiliation des auteurs : COGIT (1988-2011) Thématique : GEOMATIQUE Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : 10.1007/978-3-540-36998-1_17 En ligne : https://doi.org/10.1007/978-3-540-36998-1_17 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=103324

Different quality level processes and products for ground-based 3D city and road modeling / Bahman Soheilian (2006)    

Public Titre : Different quality level processes and products for ground-based 3D city and road modeling Type de document : Article/Communication Auteurs : Bahman Soheilian , Auteur ; Olivier Tournaire , Auteur ; Lionel Pénard , Auteur ; Nicolas Paparoditis , Auteur Editeur : Berlin, Heidelberg, Vienne, New York, ... : Springer Année de publication : 2006 Collection : Lecture notes in Geoinformation and Cartography, ISSN 1863-2246 Conférence : 3D-GIS 2006, Innovations in 3D Geo Information Systems 07/08/2006 08/08/2006 Kuala Lumpur Malaisie Proceedings Springer Importance : pp 417 - 427 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées [Termes IGN] image aérienne [Termes IGN] image terrestre [Termes IGN] qualité des données [Termes IGN] reconstruction 3D du bâti [Termes IGN] signalisation routière [Termes IGN] système de numérisation mobile Résumé : (auteur) This paper proposes ideas and some solutions for providing different quality level processes and products of a ground-based Mobile Mapping Data Collection System (MMDCS) for 3D city and road modelling. The primary products are image-based databases with different georeferencing qualities. Then cooperative applications of terrestrial and aerial images for higher level processes such as road-marks extraction and building reconstruction are discussed. We will also show that an image database is of great potential to improve quality of positioning in autonomous navigation applications. Numéro de notice : C2006-028 Affiliation des auteurs : MATIS (1993-2011) Thématique : GEOMATIQUE/IMAGERIE Nature : Communication DOI : 10.1007/978-3-540-36998-1_33 En ligne : https://doi.org/10.1007/978-3-540-36998-1_33 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=99879

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peut être téléchargé Different quality level processes ... - pdf auteur RG Adobe Acrobat PDF