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Generalization of 3D building data / Franck Thiemann (01/08/2002)    

Public contenu dans Geospatial theory, processing and applications : proceedings of the ISPRS commission 4 symposium, 8 -12 July 2002, Ottawa, Canada / Costas Armenakis (2002)   Titre : Generalization of 3D building data Type de document : Article/Communication Auteurs : Franck Thiemann, Auteur Editeur : International Society for Photogrammetry and Remote Sensing ISPRS Année de publication : 01/08/2002 Collection : International Archives of Photogrammetry, Remote Sensing and Spatial Information Sciences, ISSN 1682-1750 num. 34-4 Conférence : ISPRS 2002, Commission 4 symposium, Geospatial theory, processing and applications 08/07/2002 12/07/2002 Ottawa Canada OA ISPRS Archives Importance : pp 286 - 290 Format : 21 x 30 cm Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] généralisation automatique de données [Termes IGN] reconstruction 3D [Termes IGN] visualisation de données [Vedettes matières IGN] Généralisation Résumé : (Auteur) Today, more and more (semi-) automatic tools and techniques are getting available, that allow for an efficient capture of more and more detailed 3D city models. With the availability of such data, the question rises, how these typically huge data sets can efficiently be handled, manipulated, analysed and visualized. Concerning visualization, the Level of Detail (LOD) concept from Computer Graphic provides a mechanism to only present that information, that is currently visible in an adequate resolution level. The problem, however, is how such a multi-scale representation of buildings can be automatically gained. This generation is a generalization problem. In the paper a concept is sketched, that relies on the representation of buildings in terms of Constructive Solid Geometry (CSG). Firstly, the complex building shape has to be transformed into CSG, which involves a segmentation of the building into its relevant parts. Secondly, generalization mechanisms can operate on the CSG-tree. Finally, the transition between neighbouring generalization levels is achieved using a differential scheme, where only the differences between adjacent generalization levels are stored, instead of the whole models. Numéro de notice : C2002-021 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Communication DOI : sans En ligne : http://www.isprs.org/proceedings/XXXIV/part4/pdfpapers/455.pdf Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=64979

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