The harmonized geological map of Slovenia at a scale of 1:1,000,000 is a simplified version of the 1:250,000 scale Geological Map of Slovenia (Buser, 2009). The latter was compiled from the Basic Geological Map of Slovenia at a scale of 1: 100,000 (contributed by various authors between 1960's and 1980's and updated with new information gathered by S. Buser). The map is basically lithostratigraphic. The two layers incorporated in the map are lithostratigraphic units and major faults. The faults depicted on the map were selected using two criteria; regional extent and tectonic importance. The map presented here was edited specifically for the purpose of the OneGeology-Europe project by M. Bavec, M. Novak, M. Poljak, M. Trajanova and D. Skaberne.
Data of Geological map were reclassified into classes of IAH classification on the base of hydrogeological characteristics. IAH classification is based on description of the hydrogeological units. Firstly, based on extensiveness and productivity and secondly on type of porosity. The purpose is to provide assistance to the strategy of groundwater exploitation as to protection and water resources management.