C map in Slovenia represents one layer of vulnerability map COP in Slovenia that has been applied on the area covered by karstic rocks. The map is constituated from calcualation of distance to swallow holes and sinkihg streams, slope, high and low vegetation cover. Vulnerability classes are: 0-0.2 Very High,0.2-0.4 High, 0.4-0.6 Moderate, 0.6-0.8 Low, 0.8-1.0 Very low.