Every lake, river and marsh since 1984

Choose a place. The system reads the global surface-water atlas, built from every Landsat image from March 1984 to 2020, and shows how often each pixel was water, where water became permanent, appeared, disappeared or turned seasonal, how water occurrence changed between the 1980s–90s and the 2000s–2010s, and how many months water was present in 2020.