Abstract
To facilitate the incorporation of 3D CAD objects into the 3D‐GIS environment, this paper proposes a feasible approach to transform the 3D geometric information of CAD objects expressed by the IFC model into geometric objects for the GML model. The discussions include not only the proposed model transformation methodology but also the development of a software tool that implements the proposed methodology. In addition, a simple model transformation example is provided to demonstrate the feasibility of the proposed methodology and the functionalities of the developed tool.
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