Research on Key Technologies of City Information Modeling

In order to solve urban development problems and achieve sustainable urban development, building smart cities has become an essential core concept for urban development in the world today. From the perspective of current smart city needs, this article introduces the concept and basic characteristics of CIM, an information technology closely related to smart cities, and analyzes its key technologies BIM (Building Information Modeling), GIS (Geographic Information System), IOT (The Internet of Things), and a brief overview of the relationship between the three, laid a preliminary foundation for further related research.