The erosion classification was regarded applicable for grassland and alpine areas, and the three first levels correspond to erosion classes 0, 1 and 2, while level 4 contains classes 3-5. Further work is needed for improvement of the first three levels in particular if the 4-level model approach would be adapted in Iceland. Expert knowledge and classifications developed in the Icelandic farmland and Iceland Forestry Service databases were used to obtain suggested classification for forests and wetlands in Iceland. The AUI Farmland Database project contains a surface classification based on satellite images.