On 18 June 2011 00:32, Rob Myers <r...@robmyers.org> wrote:
> On 06/17/11 16:06, John Smith wrote:
>> So once again I'm met with silence and can only assume that produced
>> works licensed under cc-by or cc-by-sa can be derived from,
>
> Do read the discussions I had with odc-discuss when someone asked about
> this before:

Which is mostly about database directive, which only applies to a
limited region.

> If you miraculously manage to create a Derived Database from the
> Produced Work, you know the requirements due to the advertising on the
> Produced Work (which BY-SA handles under the BY part of the licence).

Without a contract it wouldn't be enforceable outside the EU, you
would need at the very minimum a copyright license like cc-by-nd,
especially on those that plan to distribute tiles as PD/CC0.

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