웹 서비스를 고려한 스마트시티 디지털 트윈 모델 경량화 및 시스템 구축방안

Abstract

Recently, it has been getting an increasing attention to develop a digital twin system that can provide spatial information and services of a smart city through a Web service, and building a digital twin system with IFC-CityGML integrated data has been the most desirable approach. However, due to the heavy computing load and technical difficulties to process the IFC-CityGML integrated data, such a system is not appropriate to provide various smart city services to the unspecified public as a Web service. To address the issue, the study proposes a method that uses a lightweight 3D object model and a game engine. The method is able to not only develop a Web-based digital twin system efficiently, but also run physical simulations by using the game engine, the reality level of which is difficult to achieve with a common web 3D visualization engine. The effectiveness of the proposed method has been verified through a case study of fire emergency management that implements a digital twin system in LOD 3.5 and simulates the shortest evacuation route.