The Geo-harmonizer project aims at reducing problems of national data with using seamless complex (geographical) data over the entire extent of the EU, and “opening data” through: using Open Data licenses; enabling wider public access to the data by not only scientists and specialists, but also non-professionals; facilitating increased use of EC-funded data without imposing any expectations on users to possess specialised or costly infrastructure; working closely with the national authorities, organizations and NGOs including the existing EC-funded systems such as DIAS, Copernicus programme and similar. The Geo-harmonizer tools and data were used to generate decision-ready layers such air quality and pollution, potential natural vegetation, potential for producing energy from solar insolation, wind energy and similar. To calculate these value-added decision-ready maps, topographic data (DEMs), Earth observation (EO) data, hydrological and meteorological data were used. The maps were produced using automated mapping systems largely based on Machine Learning algorithms available in the open source software.