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The OS has some “free” map data, but what am I allowed to use it for?

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I voted to close this question because I do not believe that questions of legal interpretation should be entertained on this site due to potential liability for both the site and the person answering. Asking for a link to the licence is OK, asking for interpretation is dangerous. – JasonBirch Jul 24 '10 at 6:53
up vote 4 down vote accepted

The full license text is available at the OS website. Looks relatively simple - you can use it commercially if you want, but you must attribute them.

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The license is similar to existing Attribution-only licenses, like CC-By. (Compatibility, on the other hand, is another issue.) – Christopher Schmidt Jul 23 '10 at 17:16
@Christopher The licence explicitly states compatibility with CC-by v3 -- see my answer for the actual text from the licence – Rowland Shaw Jul 24 '10 at 13:10

You're asking a question that has legal implications. If you really need to know what you can or can not do with the OS data, you need to consult a lawyer. Either that or make your own interpretation, and assume the risk that it is incorrect.

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According to the OpenData licence, all data can be safely assumed to be under a CC-by 3.0 license - the T&C Explicitly say so:

Creative Commons

These terms have been aligned to be interoperable with any Creative Commons Attribution 3.0 Licence. This means that you may mix the information with Creative Commons licensed content to create a derivative work that can be distributed under any Creative Commons Attribution 3.0 Licence.

If you want to use outside of that licence, then speak to a lawyer, or read over the licence yourself

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