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2012. United States. Department of State. Office of the Geographer. This line shapefile contains country boundaries for Africa and American continents. Large Scale International Boundaries (LSIB) are created and mai... United States. Department of State. Humanitarian Information Unit.
2006. World Wildlife Fund. This river network (stream lines) map for South America is derived from the flow direction map for South America. The flow accumulation map for Sou... Geological Survey (U.S.).
2006. World Wildlife Fund. This river network (stream lines) map for South America is derived from the flow direction map for South America. The flow accumulation map for Sou... Geological Survey (U.S.).