Hi, On 18 November 2010 17:30, Rob Myers <r...@robmyers.org> wrote: > On 11/18/2010 02:58 PM, Ed Avis wrote: >> >> Yes, that's right, but I also wanted to ask about the other requirement that >> at times has been ascribed to the ODbL: that you cannot reverse-engineer the >> produced map tiles, so they cannot be fairly described as CC-BY-SA or CC-BY >> or indeed anything other than ODbL or 'all rights reserved'. > > They can fairly be described as CC because you can exercise all the rights > that the CC licence grants you over the CC-licenced work.
When I'm given a set of tiles under a CC license (which disclaims the database rights in some versions), I think I can justifiably assume that it doesn't contain anyone else's work under conditions different from those in the license I was given, unless I'm told so. So I should be able to excercise my right to reverse engineer the POIs names and positions and the streets graph represented by the bitmaps and distribute the result under a license compatible with the CC license. So it should be entirely possible to reproduce most of planet.osm or at least the useful part of it (so e.g. not the object IDs and not their order) which would not be covered by database rights or copyright of OSMF. For example I could produce z30 tiles with a public domain mapnik stylesheet and my friend could run a program to produce a .osm file taking the tileset and the stylesheet as input. > > If you use a CC licenced work to recreate another, non-CC-licenced work, for > example if you rearrange it to make the score and lyrics to a Lady Gaga song > then record that, the work that you have "reverse engineered" still breaks > copyright despite the fact that you have used a CC licenced work to make it. Is there any known case that would show that this is how copyright works? I'm no lawyer, but copyright is mostly "reasonable" to me whereas what you explain would make it unreasonable. For example say I'm using the CC-BY-SA photographs from flickr to create a great photo wall, placing the pictures in alphabetical order. How do I know that I'm not recreating a differently licensed work by somebody else, from which all the pictures were cut out? Cheers _______________________________________________ legal-talk mailing list legal-talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/legal-talk