Each soil landscape unit is an inventory of soil and landscape information with relatively uniform land management requirements, allowing major soil and landscape qualities and constraints to be identified. Soils are described using the Australian Soil Classification and the Great Soil Group systems. Reference: Department of Environment and Climate Change, 2009, Soil and Land Resources of the Hawkesbury-Nepean Catchment interactive DVD, Department of Environment and Climate Change NSW, Sydney. Note: Part of this area is also covered by the Soil landscape 1:100 000 and 1:250 000 mapping series for the mapsheets of Bathurst, Braidwood, Dubbo, Gosford, Goulburn, Katoomba, Kiama, Penrith, Singleton, St Albans, Sydney, Wallerawang and Wollongong. Part of this area is also covered by the mapping of Hydrogeological landscapes of NSW and Acid Sulphate Soil Risk Mapping.