Challenges of Semantic 3D City Models: A Contribution of the COST Research Action TU0801

This technical paper is a contribution to the identification of current challenges of semantic 3D city models. They are presented in four parts, namely 3D enriched city models and their connection with urban information models and smartcities, urban models integration, urban analyses and data. This work is an output of the COST Action TU0801 "Semantic Enrichment of 3D city models for sustainable urban development".