Integration between energy sectors is one of the levers to enable massive penetration of renewable energy sources in electricity generation. The study of different integration possibilities that take into account resource availability requires complex assessments. Such assessments cannot disregard a solid knowledge base of the different territorial aspects involved. This

context includes the activities for the creation of the new Integrated Atlas for the national energy system, a Web GIS to support studies, research and evaluations on the energy system as a whole, with a focus on the interaction of the electricity system with other systems (e.g., water, gas) and with the territory.

Starting from the prototype version of the geo-database (relational geographic database underlying the Integrated Atlas), the data structure was modified and integrated. The revision process led to the marginal reorganization of the already implemented schemas, to the addition of a specific schema for the data supporting multi-energy models, to the introduction of new variables into the existing tables, and to the identification and structuring of new tables. At the same time, the geo-database interface and the functionalities for data selection and extraction were also revised. The activity was also focused on a consistent population of the geo-database with data from different sources and with different spatial and temporal details.

Finally, the main changes and additions that needed to be made to the Web GIS application were identified, with particular attention to the functionalities that concern the analyses conducted with the models for multi-energy planning at a territorial scale. These functionalities will allow, more specifically, the territorial characterization of input data for multi-energy models and the dissemination of significant results on the topic of multi-energy systems.

The geographic database, by virtue of its completeness, already represents a shared basis on which several public and private entities will be able to develop in-depth analyses for the benefit of the national electricity-energy system. The functionalities of the new Integrated Atlas will make the information even more usable, ensuring effective and guided interaction by users and supporting all processing.