Abstract
It is widely acknowledged that the integration of BIM and GIS data is a crucial step forward for future 3D city modelling, but most of the research conducted so far has covered only the high-level and semantic aspects of GIS-BIM integration. This paper presents the results of the GeoBIM project, which tackled three integration problems focussing instead on aspects involving geometry processing: (i) the automated processing of complex architectural IFC models; (ii) the integration of existing GIS subsoil data in BIM; and (iii) the georeferencing of BIM models for their use in GIS software. All the problems have been studied using real world models and existing datasets made and used by practitioners in The Netherlands. For each problem, this paper exposes in detail the issues faced, proposed solutions, and recommendations for a more successful integration.
Highlights
Geographic information systems (GIS) have long been used to model the environment and to perform 2D spatial analyses of large areas
The two modelling paradigms embodied by Industry Foundation Classes (IFC) and CityGML are representative of building information modelling (BIM) and 3D GIS data in general, and they are both widely used in their respective domains
Most BIM sites fall within a complete voxel or a few voxels only, so it is worth considering what is the value of conclusions drawn from this data integration which may have severe impact on a risk analysis? This requires the close involvement of geological data experts
Summary
Geographic information systems (GIS) have long been used to model the environment and to perform 2D spatial analyses of large areas. As users of BIM software want to incorporate the surrounding features of a building or another structure into their workflow, it is only logical that the BIM domain is currently enhancing its standards and software to support environmental information such as infrastructure (http://www.buildingsmart-tech.org/infrastructure), and that BIM users increasingly turn to existing GIS datasets containing this environmental information Both domains are overlapping, increasingly modelling the same objects, even if the data is represented and stored in rather different ways. In view of the lack of research about the GIS-BIM integration, in the beginning of 2017, the GeoBIM project was started in The Netherlands with the aim of developing methodologies to process complex BIM and GIS models concurrently, in an automated fashion, and in a manner that is usable in practice.
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