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21. World Oceans, 1:50 million (2012)

2012. Patterson, Tom and Kelso, Nathaniel Vaughn. This polygon shapefile depicts oceans split into contiguous pieces. These data are derived from the 10m ocean coastline data. Ocean polygon is the ... North American Cartographic Information Society.

22. World Oceans with Scale Rankings, 1:10 million (2012)

2012. Patterson, Tom and Kelso, Nathaniel Vaughn. This polygon shapefile depicts oceans split into contiguous pieces with scale ranking. These data are derived from the 10m ocean coastline data. Oc... North American Cartographic Information Society.

23. World Reefs, 1:10 million (2012)

2012. Patterson, Tom and Kelso, Nathaniel Vaughn. This polyline shapefile depicts coral reefs and atolls worldwide. Major coral reef data derived from the World Data Bank 2. These data are represen... North American Cartographic Information Society.