Generation And Application Of IndoorGML Model Based On BIM Model

In recent years,the construction of smart cities in China has developed rapidly,and the concept of city information model(CIM)has been paid more and more attention by scholars since it was put forward,among which spatial data management is an important step in the process of building CIM.However,in the current research on spatial data management,most of the research objects are outdoor spaces,and there are great differences between indoor and outdoor spaces.Therefore,the data management methods of outdoor spaces cannot be directly applied to indoor spaces,and building a digital model suitable for indoor space information expression can be used as an effective means for indoor space data management.IndoorGML is a standard for indoor spatial data exchange and expression proposed by OGC,and its appearance has changed the present situation that there is no unified data format for indoor spatial models.However,because IndoorGML is still in the initial stage of development,the existing generation methods still have many problems,such as tedious generation process,difficulty in integrating semantic information and so on.Improving the generation method of IndoorGML will benefit the management of indoor spatial data,and then provide a solution for the construction of CIM in indoor spatial information.In view of the shortcomings of existing methods for creating IndoorGML,this paper proposes a BIMbased method for creating IndoorGML model,which uses BIM model as the data base to quickly create an IndoorGML model containing semantic information.Through experiments,it is found that this method can make use of the rich geometric information and attribute information in BIM model,and the generated model can not only describe the connectivity of indoor space on the geometric level,but also integrate the attribute information in BIM on the semantic level,so as to fully express the information of indoor space.In order to further verify this method,this paper selects a BIM model of a hospital as a case,and the experiment proves that this method has high feasibility when used in large buildings with complex indoor space.In order to explore the deeper application of the IndoorGML model,this paper transforms the IndoorGML model into a semantic network model,combines it with the network analysis in graph theory,calculates the related attributes of the complex network,analyzes the relationship between different spaces in hospital indoor space through the calculation results,and discusses the possibility of applying the IndoorGML model to indoor space analysis.In addition,the NRG part of the IndoorGML model is used to analyze the streamline of indoor space,so as to explore more application possibilities of the IndoorGML model.At last,this study tried to combine the IndoorGML model with CIM platform,and published and shared the IndoorGML model in the virtual city through the geospatial information platform,and completed the visualization and interactive operation of the IndoorGML model and its related indoor spatial data on this platform,providing data information support for CIM in the construction of indoor spatial data.The whole thesis contains about 34 000 words,85 pictures and charts.