Print Email Facebook Twitter Topologically consistent 3D city models obtained by extrusion Title Topologically consistent 3D city models obtained by extrusion Author Ledoux, H. Meijers, B.M. Faculty OTB Research Institute for the Built Environment Department OTB Research Date 2010-01-29 Abstract 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 exibility 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. To reference this document use: http://resolver.tudelft.nl/uuid:487c2a74-7740-4e9b-a259-d0cd0933f0e9 DOI https://doi.org/10.1080/13658811003623277 Publisher Taylor & Francis ISSN 1365-8816 Source http://www.tandfonline.com/doi/abs/10.1080/13658811003623277 Source International Journal of Geographical Information Science, 25 (4), 2011; premilinary version Part of collection Institutional Repository Document type journal article Rights (c) 2010 The Author(s)Delft University of TechnologyTaylor & Francis Files PDF 270047.pdf 367.45 KB Close viewer /islandora/object/uuid:487c2a74-7740-4e9b-a259-d0cd0933f0e9/datastream/OBJ/view