Semantically Enriched 3D Geometric Modeling for Urban Digital Twins

An urban digital twin (UDT) is the virtual representation of real assets, processes, systems and subsystems (e.g., transportation, energy distribution, water usage, population, education, health, cultural heritage, etc.) of a city. By using and integrating heterogeneous data, UDTs actually allow monitoring the current status of cities and predicting/anticipating possible complex scenarios. We focus on the design and development of the geometric layer of UDTs, that is the 3D digital representations of urban morphology and physical structures (i.e. buildings), properly enriched with heterogeneous semantic information. Our method aims to build a functional geometric model of the city, exploiting at best the available data, trying to achieve a representation that is able to support geometry-related queries.