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Vast, three-dimensional models of urban environments are already a familiar sight – you might explore one in a video game, for example – but they can also be used for cities’ information services, research and commercial purposes. 3D city modelling has become a common task in producing geographic data for cities. The Research Institute of Measuring and Modelling for the Built Environment (MeMo) at Aalto University both studies city models and produces the data used in their creation.
The MeMo research group produces data for city models through a variety of 3D measurement and modelling methods. In particular, they use methods based on photogrammetry or laser scanning, including drone-based aerial imaging, terrestrial laser scanning or SLAM-based mobile mapping, says Arttu Julin, a doctoral student with the group.