20251121 15522400 1.0 TRUE WOfS_40_percent Spatial extent showing where water is detected at the surface, relative to the total number of clear observations, for 40% of the time for the entire period of available data (1987 to 2018). © Commonwealth of Australia (Geoscience Australia) 2020. This product is released under the Creative Commons Attribution 4.0 International Licence. http://creativecommons.org/licenses/by/4.0/legalcode