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.
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2012. Patterson, Tom and Kelso, Nathaniel Vaughn. This polyline shapefile contains international, disputed, indeterminate, and control line boundaries on land and offshore worldwide, including 200-... North American Cartographic Information Society.