BIM effectively connects data, processes, and resources throughout various stages of a building’s lifecycle. From design and construction to operation and maintenance, BIM focuses on detailed individual models. This allows it to specialize in the building’s interior design and implementation at a micro level. In contrast, GIS supports research in broader geographic spatial information, addressing diverse needs for processing, computing, and analyzing data in large-scale geographic environments.
There is a strong relationship between BIM and GIS. For BIM, 3D GIS offers powerful software tools for spatial queries and spatial analysis based on surrounding macro geographic data, providing valuable decision support for BIM applications.
Conversely, for 3D GIS, BIM models with attributes serve as a crucial data source. Integrating BIM and GIS enables visualization and supports both macro and micro management functions, including equipment operation. However, challenges remain in GIS+BIM data fusion, such as partial data or attribute loss in integration, limited visualization capabilities, and difficulties in data management and analysis.
To achieve better comprehensive management results, BIM and GIS technologies must be integrated on a unified platform. This requires further development of precise mapping algorithms, rules, and semantic mapping tables between GIS and BIM models to better serve users.
At the data level, China’s leading GIS provider, SuperMap, offers data export plugins for major BIM design software like Revit, Bentley, and CATIA to facilitate BIM and GIS integration. These plugins allow exporting vertex and attribute data all at once, classified by type or layer. The exported data retains the 3D modeling features of BIM and generates multi-level details (Levels of Detail, LoD), enhancing data display and visualization on 3D GIS platforms.
Additionally, the exported data maintains the logical layout and closure of BIM datasets. Topologically closed 3D objects support spatial operations, relationship queries, spatial analysis, Boolean operations on terrain data, and more.
After integration, BIM data is stored in a model dataset where each record represents a BIM entity. This dataset consists of two components: model geometry information (GeoModel3D) and attribute information. To support compatibility with various BIM modeling software, SuperMap GIS 9D offers a plugin with an open development interface for reading and writing GeoModel3D data.
Through this interface, users can create different model objects based on the structure, materials, texture rendering, and attribute information of each BIM object, and write BIM data directly into the dataset.
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