[OSM-talk] Use policies update

Simon Poole simon at poole.ch
Sat Nov 5 23:25:54 UTC 2016

Historically using CC by-SA for the tiles had a certain logic, as the
data used that licence and while there was a cloud of uncertainty how
that would apply to OSM data, you could reasonably argue that the tiles
were a derivative and had to be licensed on the same terms.

Post licence change that tight linkage has gone and the creator of a
"Produced Work" has a large degree of freedom in how to license their
work. It would, for example, be completely possible to take the CC0
licensed openstreetmap-carto style sheet and produce -exactly- the same
tiles as the standard layer and license them differently. Or are we
claiming that we are actually licensing the design/look and feel of the
standard tiles on CC by-SA terms (and by that have rights in any
derivatives of that style) and you can't actually use
openstreetmap-carto style sheet to produce a style that is visually
similar to our standard style?

Unlikely, so why are we are applying a licence that has a number of
undesirable properties and would cause a lot of headaches if taken
seriously to our tiles?


Am 05.11.2016 um 21:03 schrieb Martin Koppenhoefer:
> 2016-11-05 15:26 GMT+01:00 Simon Poole <simon at poole.ch
> <mailto:simon at poole.ch>>:
>     As I mentioned at SOTM there is no real rationale these days
>     for the CC by-SA licence and we should probably be looking at that too
> Would you mind elaborating briefly on this here as well? Not everybody
> had the possibility to attend SotM...
> cheers,
> Martin

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