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<p>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.</p>
<p> 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?
<br>
</p>
<p>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? <br>
</p>
<p>Simon<br>
</p>
<br>
<div class="moz-cite-prefix">Am 05.11.2016 um 21:03 schrieb Martin
Koppenhoefer:<br>
</div>
<blockquote
cite="mid:CABPTjTD7mE1vhaCmgVUG11rXgdDQ6w1=0gR447EMOdyoGPw=gA@mail.gmail.com"
type="cite">
<div dir="ltr">
<div class="gmail_extra"><br>
<div class="gmail_quote">2016-11-05 15:26 GMT+01:00 Simon
Poole <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:simon@poole.ch" target="_blank">simon@poole.ch</a>></span>:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div id=":66c" class="a3s aXjCH m15834e42560ed279">As I
mentioned at SOTM there is no real rationale these days<br>
for the CC by-SA licence and we should probably be
looking at that too<br>
</div>
</blockquote>
<div><br>
<br>
</div>
<div>Would you mind elaborating briefly on this here as
well? Not everybody had the possibility to attend SotM...<br>
</div>
<div><br>
</div>
<div>cheers,<br>
</div>
<div>Martin<br>
</div>
</div>
<br>
</div>
</div>
</blockquote>
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