The Australian Collaborative Land Evaluation Program (ACLEP) and the National Committee on Soil and Terrain (NCST) have released the revised Physiographic Regions of Australia (Pain et al. 2011). The map below shows the Physiographic Regions (smallest subdivisions), Provinces and Divisions (largest subdivisions). The Physiographic Provinces comprise Level 1 in ASRIS whilst the Physiographic Regions are the ASRIS Level 2 tracts.