IFC-CityGML LOD mapping automation using multiprocessing-based screen-buffer scanning including mapping rule

Recently, research has been performed on Geographic Information Systems (GIS) to effectively recycle abundant Building Information Modeling (BIM). However, GIS and BIM use different schemas to describe forms. In particular, GIS defines the Level of Detail (LOD) in schema to quickly visualize numerous city-level objects. Because of schema differences, a mapping process is essential to reuse BIM in GIS. The problem is that mapping LOD models requires significant calculation time. This method reduces BIM-GIS mapping operation productivity, making it difficult to reuse BIM. In this research, we enhance mapping work productivity by developing a method that automates LOD geometry mapping using Screen-Buffer scanning-based Multiprocessing (SB-MP) including semantic mapping rule. The proposed method can dramatically improve LOD geometry modeling productivity. Finally, the developed results are evaluated quantitatively.