[Osmf-talk] CC BY SA 2.0 and backup plan

80n 80n80n at gmail.com
Sat Dec 5 18:20:05 UTC 2009


On Sat, Dec 5, 2009 at 6:15 PM, Matt Amos <matt at asklater.com> wrote:

> 80n wrote:
>
>  On Sat, Dec 5, 2009 at 2:23 PM, Matt Amos <matt at asklater.com <mailto:
>> matt at asklater.com>> wrote:
>>
>>    Jeroen Carelse wrote:
>>     > I read the CC BY SA 2.0 under which the current data seems to be
>>    licensed.
>>     > Based on my understanding I would be allowed to download all the
>>    data, put it on my server and use it under the  CC BY SA 2.0 stated
>>    conditions.
>>     >
>>     > I could in that case keep it as it is or perhaps start alt-OSM
>>    v3.0 ( to name something).
>>     >
>>     > In this way the current data would be safe guarded from, if any,
>>    possible disruptions or "white spots".
>>     >
>>     > What is wrong in my reasoning?
>>
>>    nothing. we will be providing a "full history planet" at the last point
>>    before the changeover itself to ensure that all data contributed under
>>    CC BY-SA is available. all previous planet files will, of course,
>>    continue to be CC BY-SA licensed.
>>
>>    i think it would be good to have this hosted on a read-only server
>>    somewhere, as there may be people who change their mind post-vote and
>>    need to "recover" their contributions. this process would be helped by
>>    making access to the old contributions easier.
>>
>>
>> It should be pointed out however that you would not be allowed to combine
>> the CC-BY-SA planet file with new ODbL licensed data and publish a map from
>> it.
>>
>> ODbL and CC-BY-SA are incompatible and you cannot publish anything that
>> contains a mixture of the two.
>>
>
> that's not the full story: you can't publish a map based on a derivative
>  of both the CC BY-SA data and ODbL**.
>
> Sorry, having just read the other thread, you are right this is not the
full story.


> you probably *can* publish a map based on a collective database of CC BY-SA
> data and ODbL data, and the produced work will be CC BY-SA licensed.
>
> i think you *can* publish a map based on a collective database of CC BY-SA
> data and a derivative of ODbL data, and the produced work will be CC BY-SA
> licensed and the whole dump, or diff, of the derivative ODbL data must be
> available.
>
> i think you *can* publish a map based on a collective database of CC BY-SA
> derivative data and a derivative of ODbL data as long as the derivative
> doesn't "represent, in terms of obtaining, verification or presentation,
> significant investment", and the produced work is CC BY-SA, and the
> diff/dump of the ODbL data is made available.
>
> I'm still thinking this through but how would you create the ODbL
derivative database?  You'd have to do it without any recourse to the CC
BY-SA data and I don't see how that would be possible.

80n
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