[OSM-legal-talk] CC-BY-SA for source data, other license for rendered derivatives

[Richard Fairhurst]

Etienne wrote:

> On 2/28/07, Richard Fairhurst <richard at systemed.net> wrote:
>> Etienne wrote:
>>> 2) What would be the status of data that is digitised from a rendered
>>> image?  Especially if the quality of the resulting data was a near
>>> match to the original source data.
>>
>> The geodata is copyright OSM Contributors, and licensed according to
>> our terms - no matter how you extract it.
>
> So we need some way of distinguishing between "geodata" that is
> somehow encoded in an image and the image itself.

I'm hopeful we might not need that!

If you trace the geodata in the map, or use the hypothetical whizzy  
software, then what you'll create is a recreation of our geodata.

Because it's more or less identical, it is therefore (c) us. Doing  
anything with it outwith our terms is an infringement.

(By the same token, tracing from OS maps is an infringement, even if  
it's not byte-for-byte identical.)

cheers
Richard