Zhihang Yao

Extending 3DCityDB with Oracle AI Database Support and LLM-Based Natural Language Interfaces

The open-source 3D City Database (3DCityDB) is a widely used solution for storing and managing semantic 3D city models based on the CityGML standard. Its latest version 5 introduces a redesigned and highly generic schema along with a JSON-based schema mapping mechanism, which was...

Design and Implementation of an AR System for Real-Time Urban Model Editing and Visualization

Abstract. Urban planning increasingly relies on 3D city models and geospatial databases for sustainable development. However, no complete system currently offers immersive 3D visualization of building attributes in augmented reality (AR), bidirectional attribute editing propagate...