The transnational EU Interreg North-West Europe project DGE-ROLLOUT aimed to promote the Deep Geothermal Energy (DGE) potential of the North Upper Rhine Graben and of the Lower Carboniferous carbonate rocks (Dinantian). The latter occur widespread in the North-West European subsurface and are expected to be a favorable reservoir for hydrothermal energy extraction. Besides the Geological Survey of North Rhine-Westphalia as the lead partner, the DGE-ROLLOUT project partners included the national geological surveys of Belgium, France and the Netherlands, as well as industry partners and research institutions. In this application, an overall view through an interactive online map was developed merging the baseline sources to identify potential geothermal hotspot regions within the project area. The basis for this categorization comprises harmonized geological knowledge, DGE resource potential and the market/investor correlation (socio-economic potential).