## 2 Literature Review
### Collaborative Management of Information Between Each Scale  
Previous studies have conducted preliminary research on the information coordination between micro, meso, and macro. [PERSON] et al. analyzed and pointed out that the traditional method of individual project management could not be directly applied to the management of large-scale cluster projects and proposed a dynamic management model suitable for large-scale cluster projects [21]. [PERSON] et al. proposed a collaborative management mode of BIM-based two-level (enterprise-level and project-level) architecture of a hydraulic engineering and digital engineering management method to realize the intelligent management of multi-elements such as group projects schedule, quality, investment, and safety [22]. [PERSON] integrated BIM and GIS to build an infrastructure information platform, which is used to assist urban management by leveraging geographical information as well as building and facility data [23]. On the other hand, in the collaborative study of meso-macro information, [PERSON] built a government-level BIM public service management platform in Yangpu District of Shanghai, combined BIM and GIS with the platform based on the BIM data of pilot projects in the region and realized the government departments' mastery of the milestone information of construction group projects [24]. [PERSON] et al. analyzed the problem of management information integration and visual expression of large-scale hydropower projects. Based on BIM and GIS models of hydraulic buildings, they constructed a construction management method to realize information integration management combining mesoscale and macroscale [25]. [PERSON] systematically reviewed the application of BIM and GIS integration in urban disaster management, analyzed their capabilities in various stages such as disaster prevention, response, and recovery, and explored the data acquisition methods, interoperability, data utilization, and future development directions [26]. [PERSON] et al. constructed a regional collaborative management platform based on BIM and GIS from the project requirements within the region, so as to realize multi-stage and multi-professional information collaborative management of group projects within the region [27]. The above researchers have realized the initial information cooperation between certain two scales. However, these studies do not start from the bottom layer of information model files and data, which leads to great limitations of information collaborative management in practical applications. In this way, they cannot achieve the overall information connection among the three different scales of multiple units. In the above studies, contractor units at the microscale focus on the coordination of model information among different majors within an individual project. The micro and meso information coordination is mainly based on a management system to control the progress and quality of multiple individual projects. However, it does not consider how to unify the model file format of individual projects in different engineering fields (e.g., housing, road, bridge, etc. ), and extract and translate the information in the model. The unified model file format and effective translation data can facilitate the centralized management of all kinds of model files, and the management information (e.g., wall type, room area, etc.) of each individual project can be directly transmitted to the construction units at the mesoscale. On the other hand, construction units at the mesoscale focus on the coordination and allocation of resources within group projects. The information cooperation between meso and macro focuses on the application of the platform built by combining BIM and GIS. However, the information cooperation between meso and macro does not mention the use of BIM and GIS to meet the needs of government units for project information control indicators.