Much work has already been done on how a 3D Cadastre should best be developed. An inclusive information model, the Land Administration Model (LADM ISO 19152) has been developed to provide an international framework for how this can best be done. This conceptual model does not prescribe the technical data format. One existing source from which data could be obtained is 3D Building Information Models (BIMs), or, more specifically in this context, BIMs in the form of one of buildingSMART’s open standards: the Industry Foundation Classes (IFC). The research followed a standard BIM methodology of first defining the requirements through the use of the Information Delivery Manual (IDM ISO29481) and then translating the process described in the IDM into technical requirements using a Model View Definition (MVD), a practice to coordinate upfront the multidisciplinary stakeholders of a construction project. The proposed process model illustrated how the time it takes to register 3D spatial units in a Land Registry could substantially be reduced compared to the first 3D registration in the Netherlands. The modelling of an MVD or a subset of the IFC data model helped enable the creation and exchange of boundary representations of topological objects capable of being combined into a 3D legal space overview map ... Read more

Much work has already been done on how a 3D Cadastre should best be developed. An inclusive information model, the Land Administration Model (LADM ISO 19152) has been developed to provide an international framework for how this can best be done. While this generic framework encompasses a wide range of eventualities, it does not prescribe the data format. One existing source from which data could be obtained is 3D Building Information Models (BIMs), or more specifically in this context, BuildingSMART’s Industry Foundation Class (IFC). Obtaining data is only one part of the process from moving from a 2D to a 3D Cadastre. An efficient collaborative workflow, preferably digital, also needs to be developed. This digital workflow would determine what the 3D Cadastre needs from a 3D BIM and the process of extracting it in addition to exchange requirements. Foundations, however, would need to be laid in order to facilitate this process. To begin with, in spite of the fact that the Industry Foundation Class (IFC) is already quite an extensive model, in order to satisfy the requirements of cadastral legal spaces it would need to be enriched further. Enriching it would enable data for a 3D Cadastre to be extracted from both as-designed and as-built BIMs. Experience has shown that process harmonization between organizations is non-trivial and dependent on specific organizations within countries Standardizing at an international level is therefore something wiser to avoid. However, a collaborative workflow described in BuildingSMART’s Information Delivery Manual (IDM) is a useful illustration of how the involved actors could collaborate. Moreover, communicating the information extraction process of BIM data to 3D parcels to actors in the building world using their own lingua franca could be beneficial. ... Read more