Comparing Three Types of BIM-based Models for Managing 3D Ownership Interests in Multi-level Buildings
Behnam Atazadeh, Mohsen Kalantari & Abbas Rajabifard
There are various 3D spatial data models to support digital management of legal and physical aspects of buildings. These data models adopt three possible approaches to represent and manage spatial dimension of 3D ownership interests, namely pure legal, pure physical and integrated methods. Building Information Modelling (BIM) is a method for managing physical elements. However, its open standard can be enriched with legal information to manage spatial extent of 3D ownership interests defined inside buildings. Our recent research has proven that the open data model of BIM can be used in all the three approaches for managing 3D ownership interests. Currently, no single investigation has yet explored the performance of these approaches in BIM environment. The aim of this research is to evaluate the performance of three types of BIM-based building models in terms of communication, storage and management of 3D ownership interests defined inside multi-level buildings. The selected jurisdiction for this study is Victoria, Australia. Strata lots and common properties are the main types of 3D ownership interests in this jurisdiction. We examined how spatial extent of these ownership interests is defined in current cadastral practices. We then selected a relatively complex multi-level building comprising various private and communal 3D ownership spaces, and we developed three types of BIM-based models, namely legal, physical, and integrated ones, for the selected building. The adopted metrics for comparing the models include number of objects, geometry batches, visualization speed in terms of frame rate, query speed, and communication of structural boundaries. The outcomes indicate mixed results.
Event: 5th International FIG Workshop on 3D Cadastres
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