Recently, the demand for more precise and demand-oriented customized spatial information is increasing due to the 4th industrial revolution. In particular, the use of 3D spatial information and digital twins which based on spatial information, and research for solving social problems in cities by using such information are continuously conducted. Globally, non-face-to-face services are increasing due to COVID-19, and the national policy direction is also rapidly progressing digital transformation, digitization and virtualization of the Korean version of the New Deal, which means that 3D spatial information has become an important factor to support it. In this study, physical objects for cities defined by world organizations such as ISO, OGC, and ITU were selected and the target of the 3D object model was limited to buildings. Based on CityGML2.0, the data collected using a drone suitable for building a 3D model of a small area is selected to be updated through road name address and building ledger, which are administrative information related to this, and LoD2.5 data is constructed and urban space. It was intended to suggest an object update method for a 3D building among data.

1. 서 론
2. 디지털 트윈의 도시 적용 사례
3. 디지털 트윈 구현을 위한 도시의 물리적객체 분석
4. 3차원 건물 객체 갱신 방안
    4.1 건물 정보의 취득
    4.2 갱신 대상 선별 및 속성정보 구축
    4.3 3차원 모델링
5. 결 론
References

• Byung-Yong Kwak(서울시립대학교 공간정보공학과) | 곽병용
• Byoung-Ju Kang(서울시립대학교 공간정보공학과) | 강병주 Corresponding Author