Volume II-2/W1
ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci., II-2/W1, 51-61, 2013
https://doi.org/10.5194/isprsannals-II-2-W1-51-2013
© Author(s) 2013. This work is distributed under
the Creative Commons Attribution 3.0 License.
ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci., II-2/W1, 51-61, 2013
https://doi.org/10.5194/isprsannals-II-2-W1-51-2013
© Author(s) 2013. This work is distributed under
the Creative Commons Attribution 3.0 License.

  13 Sep 2013

13 Sep 2013

ENHANCED LOD CONCEPTS FOR VIRTUAL 3D CITY MODELS

J. Benner1, A. Geiger1, G. Gröger2, K.-H. Häfele1, and M.-O. Löwner3 J. Benner et al.
  • 1Institute for Applied Computer Science, Karlsruhe Institute of Technology, Germany
  • 2Institute for Geodesy und Geoinformation, University Bonn, Germany
  • 3Institute for Geodesy and Photogrammetry, Technische Universität Braunschweig, Germany

Keywords: Virtual 3D city models, semantic data models, CityGML, Level of Detail

Abstract. Virtual 3D city models contain digital three dimensional representations of city objects like buildings, streets or technical infrastructure. Because size and complexity of these models continuously grow, a Level of Detail (LoD) concept effectively supporting the partitioning of a complete model into alternative models of different complexity and providing metadata, addressing informational content, complexity and quality of each alternative model is indispensable. After a short overview on various LoD concepts, this paper discusses the existing LoD concept of the CityGML standard for 3D city models and identifies a number of deficits. Based on this analysis, an alternative concept is developed and illustrated with several examples. It differentiates between first, a Geometric Level of Detail (GLoD) and a Semantic Level of Detail (SLoD), and second between the interior building and its exterior shell. Finally, a possible implementation of the new concept is demonstrated by means of an UML model.