Function reference
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coastline10 - world coastlines from Natural Earth
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countries10 - world country polygons from Natural Earth
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map_units10 - world map_unit polygons from Natural Earth
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rnaturalearthhires - rnaturalearthhires : high resolution world vector maps from Natural Earth
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sovereignty10 - world sovereignty polygons from Natural Earth
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states10 - state (admin level 1) polygons from Natural Earth