[OSM-talk] server migration update / license change

[Richard Weait]

On Thu, Apr 5, 2012 at 2:49 PM, ThomasB <toba0211 at yahoo.de> wrote:
> Thanks a lot for the Update, Richard. It is much appreciated that the
> information flow works.
>
> I have a question with regards to the map at osm.org. When the database is
> clean, it would also need a re-rendering of all tiles in cache to finalise
> the license change.

Hi Thomas,

There is no requirement that tiles from osm.org be purged or
relicensed when the data base is published as ODbL.  ODbL permits
Produced Works like png tiles to be licensed $notODbL, provided that
the ODbL obligations are met.

I expect that the map tiles at osm.org will stay CC-By-SA, as they are
a Produced Work, and have a creative aspect.  This simplifies several
things, including, no need to purge all the tiles at once, and no need
to have all tile consumers update their copyright information.

That's not to say that OSM tiles will forever be served as CC-By-SA.
That also does not preclude creating and serving tile sets under other
licenses.