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<p>The basic problem is that both CC BY and CC BY-SA are very
restrictive licences, particularly the 4.0 variants. As a result
if tracing from so licensed sources was found to create a
derivative (in CC parlance an "adapted work"), the results could
be unusable for OSM purposes. <br>
</p>
<p>Skipping the longish discussion of the large differences in
copyright protection for images between different jurisdictions
(for example between where I'm sitting now and 40 km north of
here), that is the reason why the LWG suggests getting an explicit
release for imagery (see
<a class="moz-txt-link-freetext" href="https://drive.google.com/file/d/0B3PN5zfbzThqLXg1TUlxalAtVE0/view">https://drive.google.com/file/d/0B3PN5zfbzThqLXg1TUlxalAtVE0/view</a>).
<br>
</p>
In my experience our use case used to be considered slightly odd and
it was relatively easy to obtain permission, these days (with the
dawn of ML) I'm not quite that optimistic any more.<br>
<br>
Simon<br>
<br>
<div class="moz-cite-prefix">Am 15.01.2018 um 19:57 schrieb Rob
Nickerson:<br>
</div>
<blockquote type="cite"
cite="mid:CAK4yQTndMODce_3EkUNpgsAsJNAnx=Ph7+h_JVaXg3jN5BthaA@mail.gmail.com">
<div dir="auto">I missed a crucial word: "data".
<div dir="auto"><br>
</div>
<div dir="auto"><span
style="color:rgb(128,0,128);font-family:sans-serif;font-size:12.8px">Isn't
cc-by-sa imagery ok (with cc-by-sa DATA being the problem)?</span><br>
</div>
<div dir="auto"><span
style="color:rgb(128,0,128);font-family:sans-serif;font-size:12.8px"><br>
</span></div>
<div dir="auto"><span
style="color:rgb(128,0,128);font-family:sans-serif;font-size:12.8px">Thanks,</span></div>
<div dir="auto"><span
style="color:rgb(128,0,128);font-family:sans-serif;font-size:12.8px">Rob</span></div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On 15 Jan 2018 12:46 p.m., "Rob
Nickerson" <<a href="mailto:rob.j.nickerson@gmail.com"
moz-do-not-send="true">rob.j.nickerson@gmail.com</a>>
wrote:<br type="attribution">
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="auto">John provided a link on how to access the
images under Cc by sa. You have to go through a few steps.
Have you tried and had no success?
<div dir="auto"><br>
</div>
<div dir="auto">Isn't cc-by-sa imagery ok (with cc-by-sa
being the problem)?</div>
<div dir="auto"><br>
</div>
<div dir="auto">Either way, thanks John for bringing this
forward :-)</div>
<div dir="auto"><br>
</div>
<div dir="auto">Best,</div>
<div dir="auto">Rob</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On 15 Jan 2018 10:54 a.m.,
"Christoph Hormann" <<a
href="mailto:chris_hormann@gmx.de" target="_blank"
moz-do-not-send="true">chris_hormann@gmx.de</a>>
wrote:<br type="attribution">
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">On
Monday 15 January 2018, John Gilmore wrote:<br>
><br>
> Planet Labs has already released all their
California satellite<br>
> imagery under a CC-BY-SA license [...]<br>
<br>
Actually no - while they have claimed to have done
this there is no<br>
imagery actually available under such a license (if
there was you would<br>
be able to provide a link to the images - wouldn't
you?) - a clear case<br>
of openwashing.<br>
<br>
Besides that everyone should know that Planet Labs is
a persistent OSM<br>
license violator:<br>
<br>
<a href="https://www.planet.com/gallery/"
rel="noreferrer" target="_blank"
moz-do-not-send="true">https://www.planet.com/gallery<wbr>/</a><br>
<a href="https://www.planet.com/explorer/"
rel="noreferrer" target="_blank"
moz-do-not-send="true">https://www.planet.com/explore<wbr>r/</a><br>
<a
href="https://wiki.openstreetmap.org/wiki/Lacking_proper_attribution"
rel="noreferrer" target="_blank"
moz-do-not-send="true">https://wiki.openstreetmap.org<wbr>/wiki/Lacking_proper_attributi<wbr>on</a><br>
<br>
so any kind of cooperation between the OSMF and them
is - in light of<br>
this context - likely out of the question.<br>
<br>
--<br>
Christoph Hormann<br>
<a href="http://www.imagico.de/" rel="noreferrer"
target="_blank" moz-do-not-send="true">http://www.imagico.de/</a><br>
<br>
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</blockquote>
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