Under the Act of June 9, 2011, Geological and Mining Law (Journal of Laws No. 163, item 981, as amended) Polish Geological Institute – National Research Institute (PIG-PIB) performs the role of Polish Geological Survey. One of the tasks of PIG-PIB as Geological Survey is to create and maintain geological databases, in this including the system MIDAS (the System of management and protection of mineral resources in Poland – MIDAS). System MIDAS is the primary source of information on mineral resources of Poland, the exploitation of deposits and it is the source of data for the project Mintell4eu. The System contains information on deposits (and its spatial location), raw materials in deposits, raw materials resources and on the raw materials volumes of exploitation. In addition, it also contains data on mining areas and exploatation permits (concessions) as well as their spatial location. The owner of the colected data is the State Treasury represented by the proper minister resposible for geology.