All versions of Natural Earth II found on this website are in the public domain. You may use the maps in any manner, including modifying the content and design, electronic dissemination, and offset printing. The author, Tom Patterson, renounces all financial claim to the maps and invites you to use them for personal, educational, and commercial purposes.
No permission is needed to use Natural Earth II. Crediting the author is unnecessary. However, if you wish to cite the map, simply use the following: Tom Patterson.
All users of Natural Earth II are highly encouraged to read about data sources and manipulation in the About the map section.
The author provides Natural Earth II as a public service and is not responsible for any problems relating to accuracy, content, design, and how it is used.