The C-Tech project aims to investigate, develop and validate at the pilot scale a digital platform of smart cities for urban planning and modeling that - based on a three-dimensional representation of the city and its combination with various data from different sources (such as climate, energy and water consumption, mobility and, above all, the behavior of user groups, determined by the use of the mobile phone) - will allow to simulate different scenarios of energy efficiency of buildings, creation of green structures and energy efficiency of urban mobility, empowering local authorities to identify and effectively address specific environmental issues, in order to promote the reduction of their carbon footprint.