City information modelling (CIM) and urban digital twins (UDT) are two emerging technologies for smart cities that aim to provide such tools. Both offer solutions for data processing, urban analysis, design, simulation and modelling. They connect all involved stakeholders and actors to collaboratively deliver the vision of a smart city: a sustainable, inclusive, healthy, prosperous and participative city. They provide solutions for smart cities based on open standards and a multiscale and multitemporal database that integrates a wide variety of data sources presenting the full range of smart urban features, systems and processes.

This report is an output of the international conference, Conversation between City Information Modelling and Urban Digital Twins: 2021 Virtual Forum, organized by IEC SyC Smart Cities and ISO/IEC JTC 1/SC 41: Internet of things and digital twin, and held on 22-23 June 2021.

This IEC Technology Report is available for free download.