The geological setting of the sinkholes in bare Croatian karst

The sinkholes are considered as morphological indicator of the karstification intensity. Croatian sinkhole inventory is based on the recognition and manual digitalization of the sinkholes at 1:25000 scale topographic maps. From point features, sinkhole density map is derived and overlapped with lithostratigraphical units, major faults and general morphology of the area, using ArcGIS software.