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Today, preparing existing building plans for a 3D BIM (building information modelling) process is a tedious work involving lots of manual steps. Even if the data is already in a digitized and vectorised format, the lack of semantics often prevents the data from being processed in automated workflows. However, the requirements for simulation tasks, which are relevant for brown-field projects, are not too demanding regarding the level of detail. In most cases (e.g. optimized placement of fire safety equipment, evacuation planning, daylighting simulation etc.), only information about spaces and their interconnections are needed. If coefficients for the heat-transfer between spaces can be added, also energy simulations can be performed. Therefore the goal of this work is to provide a basic standardized building model, which can be derived from all sorts of legacy data (different CAD formats and styles and even scanned plans). Also basic semantics will be added to the data, which complements the definitions of the BIM standard used in this work. Based on the models, building simulation can be enabled as a cheap surplus service, promoting the usage of cloud implementation of the BIM process.

Digitalization of Legacy Building Data - Preparation of Printed Building Plans for the BIM Process