[OSM-legal-talk] Share alike

[Richard Fairhurst]

Martijn van Exel wrote:
> > "If you alter, transform, or build upon this work, you may distribute 
> > the resulting work only under the same or similar license to this one."
> Consider this case: someone wants to use OpenStreetMap data augmented 
> with POIs from a closed source in a routing application. This routing 
> application is then used within the company for which it is built, 
> for commercial purposes.  Do the POIs need to be released under 
> CC-BY-SA? The word 'may' implies they do not. 

"May" in this case means "are permitted to", so in theory, yes they do need
to be released.

But, as ever, the coach-and-horses hole in CC-BY-SA means that if your
routing application combines the POIs itself (i.e. on the client), you are
free to ignore the share-alike clause. It only applies if you deliver a
combined OSM/proprietary file from the server.

cheers
Richard


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