| http://www.w3.org/ns/prov#value | - The Level 1 (GLWD-1) corresponds to lakes (area ??? 50 sq. km) and largest reservoirs, the Level 2 (GLWD-2) permanent open water bodies with a surface area ??? 0.1 sq. km excluding the water bodies contained in GLWD-1 and Level 3 (GLWD-3) all lakes, reservoirs, rivers and different wetland types in the form of a global raster map at 30-second resolution.
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