AUTOMATIC DERIVATION OF DIFFERENT LEVELS OF DETAIL FOR 3D BUILDINGS MODELED BY CITYGML

摘要

The new OGC standard CityGML defines a standard for ontology of buildings at four different Levels of Detail (L oDs). The building models at different LoDs differ in the complexity and granularity of the geometric representation and the thematic structuring of the models into components with a special semantic meaning. In line with the definition of LoDs this paper addresses the process of automatic derivation of building models at lower LoDs from a higher LoD. The approach has been implemented and tested on a number of 3D buildings modeled at LoD4 of CityGML. The experiments showed that the presented approach allows an automatic and efficient derivation of different LoDs from the most detailed mode l. Moreover, they proved the advantages of a standard modeling language.