Planning of the built environment requires at least two different levels of planning process and modelling. They can be categorized as city/neighbourhood-scale and building-scale. The typical application for city/neighbourhood-scale is Geographic Information System (GIS) and CityGML for the open source 3D format. Meanwhile, for building-scale, Building Information Modelling (BIM) is used, and IFC format is the open source standard. In this paper, two case studies were presented, including visualization for a web application and input model of the urban microclimate modelling STEVE Tool. We used Autodesk Revit and Graphisoft Archicad in developing the building models as prototype for the transformation testing. The transformation system was developed using Feature Manipulation Engine (FME), by Safe Software. FME allowed us to restructure the data model (IFC) and transform it to the destination data format (CityGML).
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