The invention discloses a method for converting a BIM model into a
GIS model. According to the method, directly carrying out format conversion in BIM native
software; extracting attribute informationas an Excel file, associating the attribute information with a geometric structure through a unique ID, establishing a central point position file of each model part, and finally outputting a
GIS model with correct geometric structure, attribute and relative relationship of the BIM model. Meanwhile, after the model is subjected to double optimization, the GIS platform is entered, and efficient browsing and complete attribute reservation of the BIM model in the GIS platform are achieved. According to the method, BIM standard
entity model data can be automatically converted into a
GIS model; the method guarantees the integrity of the geometric information of the BIM model, guarantees the
correctness of the geometric topological relation and the correct mapping of the attribute information,can provide a good data guarantee for the integrated application of the BIM and the GIS, and provides a basis for the application of the BIM model in a
smart city.