Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XL-4/W1, 93-99, 2013
https://doi.org/10.5194/isprsarchives-XL-4-W1-93-2013
© Author(s) 2013. This work is distributed under
the Creative Commons Attribution 3.0 License.
 
06 May 2013
A UNIFIED APPROACH FOR 3D GENERALIZATION OF BUILDING MODELS IN CITYGML
S. U. Baig and A. A. Rahman 3D GIS Research Lab, Department of Geoinformatics, Faculty of Geoinformation Science and Real Estate, Universiti Teknologi Malaysia (UTM), 81310 UTM Skudai, Johor Bahru, Malaysia
Keywords: 3D, Generalization, CityGML, Semantics, Simplification, Buildings Abstract. Task-specific applications demand abstractions (generalized) 3D scenes of 3D models to be used for visualization and analysis purposes. Therefore, lower LoDs (level-of-details) from higher LoDs need to be made available to these applications. A unified generalization framework is proposed to derive multiple LoDs (LoD3-LoD1) taking both semantics and geometric aspects of 3D buildings modelled in CityGML (City Geography Markup Language) into account. For this purpose, interior structures of 3D objects at LoD4 are removed to derive LoD3 and openings (door, windows) are removed from LoD3 to derive LoD2. Remaining parts such as outer installations and walls are projected onto the ground and simplified based on CityGML generalization specifications. Algorithms for simplification with the aim to derive LoD1 from LoD2 are implemented and tested on a number of buildings of Putrajaya city, Malaysia.The experiments shows that elimination of important part (s) or merging could be avoided by applying semantic-based removal of objects at different LoDs.
Conference paper (PDF, 637 KB)


Citation: Baig, S. U. and Rahman, A. A.: A UNIFIED APPROACH FOR 3D GENERALIZATION OF BUILDING MODELS IN CITYGML, Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XL-4/W1, 93-99, https://doi.org/10.5194/isprsarchives-XL-4-W1-93-2013, 2013.

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