The International Hydrogeological Map of Europe, scale 1 to 1,500,000 (IHME1500) is a series of general hydrogeological maps comprising 25 map sheets, partly with explanatory notes, covering nearly the whole European continent and parts of the Near East. The national contributions to this map series were compiled by hydrogeologists and experts in related sciences of the countries concerned under the auspices of the International Association of Hydrogeologists (IAH). The project is supported by the Commission for the Geological Map of the World (CGMW). The scientific editorial work is promoted financially by the Government of the Federal Republic of Germany through the Federal Institute for Geosciences and Natural Resources (BGR) and by the United Nations Educational, Scientific and Cultural Organization (UNESCO). BGR and UNESCO have been responsible for the cartography, printing, and publication of the map sheets and explanatory notes. The IHME1500 seeks to represent the hydrogeological setting of Europe as a whole without regard to political boundaries. The map can be used for scientific purposes, for large-scale regional planning and as a basis for detailed hydrogeological mapping.