The Think-Cities® project aims to develop a digital tool for smart city to evaluate urban projects. Think-Cities® transforms the planning sector by offering a smart application that values the territories and connects its actors. A proof of concept (URBAN THINK®) has been developed in SaaS mode in partnership with Rennes Métropole. Think-Cities® aims to bring major evolutions to the URBAN THINK® functionalities and will thus offer a global tool for observing territories and evaluating development projects. Always focused on a Web mapping platform , based on benchmark indicators, to evaluate and simulate the impacts of development projects and to recommend optimal hypotheses about these impacts, Think-Cities® also opens up to dynamic data (IOT) and therefore to new types of indicators complementing its catalog of decision support criteria. Grafted onto a collaborative 3D mapping platform in SAAS mode, Think-Cities® transforms the spatial planning sector by offering national (HQE, ADEME, ...), international (LEED, ...) and user-specific reference indicators. to evaluate and simulate the impacts of development projects.