A SDBMS-Based 2D-3D Hybrid Model for Indoor Routing

Currently used 3D models, which are mostly focused on visualization of 3D objects and lack topological structure, have limitation in being used for 3D spatial analyses and applications. However, implementing a full topology for the indoor spatial objects is less practical due to the increase of complexity and computation time. In this study, an alternative method to build a 3D indoor model with less complexity using a spatial DBMS is suggested. It is a 2D-3D hybrid data model, which combines the 2D topology constructed from CAD floor plans and the 3D visualization functionality. We show the process to build the proposed model in a spatial DBMS and use spatial functions and queries to visualize in 2D and 3D. And, then, as an example application, we illustrated the process to build an indoor way-finding simulator.