<div class="gmail_quote">On Mon, Mar 2, 2009 at 2:03 AM, Frederik Ramm <span dir="ltr"><<a href="mailto:frederik@remote.org">frederik@remote.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Hi,<br>
<br>
until recently I was under the impression that with the "Produced<br>
Work" freedom we would finally be able to create, say, a map that<br>
combines content from other "copyleft" licenses like CC-BY-SA-NC or GFDL<br>
with OpenStreetMap content.<br>
<br>
Not so, it turns out; the "Produced Work" freedom allows us to combine<br>
OSM data *only* with other data whose license does not prohibit the<br>
addition of constraints, because ODbL mandates that we add the "reverse<br>
engineering leads to ODbL licensing" rule.<br>
<br>
So, while using OSM data together with commercially licensed data, or<br>
together with CGIAR "no commercial use" data, or together with some<br>
"academic use only" data to form a Produced Work is possible, I still<br>
cannot use OSM data together with data from a CC-BY-SA-NC source (for<br>
example) because CC-BY-SA-NC prohibits the addition of the "reverse<br>
engineering" clause.<br>
<br>
Can this be alleviated somehow?<br>
<br>
I can see that, theoretically, allowing even the smallest bit of our<br>
database to get out without the reverse-engineering clause attached<br>
*could* lead to the database being re-built under a different license,<br>
piecemeal, by someone, somewhere.<br>
<br>
But I do not think this can be an issue in practice (too much work<br>
involved). </blockquote><div><br>I can imagine a scenario where, for example, Google uses Amazon's Mechanical Turk to pay lots of people to use Map Maker to trace from OSM's rendered tiles. <br><br>This is similar to the approach used by us to trace from Yahoo! imagery, and look at the results we have achieved. It is very feasible.<br>
<br><br> </div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Also, even if someone managed to somehow re-assemble today's<br>
planet file smuggled through some reverse engineering loophole, such a<br>
one-time act doesn't get him far; he would have to implement the whole<br>
thing as a continuous process to profit from changes and updates to OSM<br>
- and if that should really happen then we can simply use our licence<br>
upgrade super powers and write a clause that prohibits exactly what he<br>
is doing without affecting legitimate other users.<br>
<br>
Maybe we can establish a slightly more pragmatic rule that opens up the<br>
possibility of making Produced Works from OSM plus other copyleft<br>
licenses. (I'm prepared to point the finger at them and say it's your<br>
fault that users cannot mix yours and ours, but I would much prefer to<br>
simply have a good solution that works for everyone instead of pointing<br>
fingers.)<br>
<br>
Bye<br>
Frederik<br>
<font color="#888888"><br>
--<br>
Frederik Ramm ## eMail <a href="mailto:frederik@remote.org">frederik@remote.org</a> ## N49°00'09" E008°23'33"<br>
<br>
_______________________________________________<br>
legal-talk mailing list<br>
<a href="mailto:legal-talk@openstreetmap.org">legal-talk@openstreetmap.org</a><br>
<a href="http://lists.openstreetmap.org/listinfo/legal-talk" target="_blank">http://lists.openstreetmap.org/listinfo/legal-talk</a><br>
</font></blockquote></div><br>