On Thu, Apr 5, 2012 at 4:07 PM, Paul Norman <[email protected]> wrote: > If the tiles are not regenerated then they will contain elements that are > licensed as cc by-sa only.
"Old tiles", the tiles generated at osm.org right now, are created from a CC-By-SA data base and are CC-By-SA tiles. No problem. > If you mix cc by-sa data with other data, doesn't this mean that the entire > work is only available as cc by-sa? No. You can, and some have, published All Rights Reserved © books with CC-By-SA OSM map images included. No problem there. In the case of osm.org tiles, there is even less of a problem. 1) "Old tiles", the current ones, are ccbysa from a ccbysa data base. That's fine. 2) "Future tiles", after the license switch is thrown, will be ccbysa from an ODbL data base. That's fine. 3) The Collective Work [1] of "old tiles" and "future tiles" in the OpenLayers frame on osm.org will also be CC-By-SA. So I don't see where there would be a licensing concern. There IS a "mapper concern." We'd like to keep the tiles fresh, wouldn't we? So updating cached tiles after any update is something that we all like to see. But I don't see a licensing concern here. :-) [1] term from CC-By-SA for combining separate works. In this case, each tile is a separate work. _______________________________________________ talk mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk
