Current data about energy characteristics at the community level are representing an important baseline for the development of strategies for efficient energy use in these communities. This work is an integral part of the Interreg IVA project "AlterVis - Self-sufficiency through renewable energy sources" with the goal to capture the renewable energy potential in the district of Hermagor in Carinthia, Austria. Therefore, a WebGIS portal for capturing, managing, analyzing, and visualizing energy characteristics based on open source technologies has been implemented. The focus of this work deals...