THE PROJECT ENVISAGES THE PROTOTYPING OF A SW PLATFORM (SPATIAL DECISION SUPPORT SYSTEM SISS) BASED ON WEB-GIS TECHNOLOGY, WHICH, STARTING FROM THE POPULATION OF A STRUCTURED BASE DATE SUCH AS: THE ENVIRONMENTAL CHARACTERISTICS OF THE AREA (MORPHOLOGY, GEOLOGY, ETC.) OF THE BUILT HERITAGE (CONSTRUCTION TYPES, BUILDING PERIODS, STATE OF MAINTENANCE). THE PROJECT IDEA IS TO SET UP A DECISION SUPPORT TOOL TO MAP OUT THE ENVIRONMENTAL RISKS (HAZARD, HYDRO-GEOLOGICAL CHANGES) Ê TO PROVIDE A COMPREHENSIVE SET OF INTEROPERABLE TOOLS, TECHNOLOGIES AND ASSOCIATED WORKING METHODS TO SUPPORT URBAN PLANNERS AND PUBLIC ADMINISTRATIONS IN EARLY EVALUATION, MANAGEMENT AND MITIGATION, THROUGH RESILIENCE BUILDING MEASURES.