This polyline shapefile contains international, disputed, indeterminate, and control line boundaries on land and offshore worldwide, including 200-mile nautical limits. The ground unit of measurement, or map unit, is based on country boundaries. Limited attributes in terms of type of boundary: disputed, treaty, and media lines. Disputed area data is derived from the The United States Central Intelligence Agency's World Factbook boundary database, but not every disputed or undefined boundary listed in the World Factbook boundary database is reflected in the main admin-0 boundaries attributes. Care should be taken with regard to undefined or disputed boundaries when attributing to reflect if the dispute is active or not. These data are represented at 1:10,000,000 scale. This layer is part of the Natural Earth Collection (v.2.0.0).Natural Earth is a public domain map dataset available at 1:10, 1:50 and 1:110 million scales. Featuring tightly integrated vector and raster data, with Natural Earth you can make a variety of visually pleasing, well-crafted maps with cartography or GIS software.