Extracting the geometry of selected structural elements from BIM models

Abstract

The use of information technology is currently a prerequisite for the successful implementation of any project in various spheres of human activity. Building information modelling (BIM) allows you to use a virtual model of a building, covering the entire life cycle of a building, starting from design, and ending with its demolition. However, as in any field, BIM technology has advantages and disadvantages. Since the models are often detailed and complex 3D models, the extraction of the coordinates of characteristic points for geodetic purposes is more difficult as in the case of 2D drawings. In this article, we provide practical information on extracting geometric parameters of objects from a BIM model in the Industry Foundation Classes (IFC) format. Three objects (wall, structural opening, and column) were selected as examples. The results obtained showed that the applied approach provides reliable data on the geometry of the objects used.