ABSTRACT 3D voxel models facilitate the simulation of 3D motions in complex indoor environments. However, existing 3D voxel models are predominantly managed in proprietary formats, which can cause delays, inconsistencies, and inefficiencies in data retrieval and processing. Thus, we introduce a novel voxel database developed specifically to support 3D evacuation scenarios. The database defines the required semantic, geometric, and attribute information. A comprehensive class diagram is then formulated and implemented in PostgreSQL/PostGIS. Furthermore, a vector‐field generation method is proposed to provide movement guidance for agents. The database is demonstrated and evaluated through case studies. The results indicate that: (1) the database can efficiently organize and query evacuation‐relevant voxels for vector‐field generation; (2) database integration significantly improves the efficiency of large‐scale, high‐resolution vector‐field generation; and (3) the advantage of the database approach diminishes at large voxel sizes. These findings suggest that the database can provide an efficient and scalable foundation for 3D evacuation simulations.
Xie et al. (Fri,) studied this question.