[OSM-legal-talk] Mixing ODbL and CC-BY-SA databases
Hi, here's an interesting one. Suppose OSM has just changed its license to ODbL. A final CC-BY-SA planet has been released, non-relicensed data has been removed from the servers, and the project is again humming along nicely (relief!). Now I would like to make a slippy map overlay where areas are coloured red or green or different shades in between according to how much data is missing from the current ODbL dataset compared to the old CC-BY-SA data set. The idea being, if an area is red, it may be worth going there and resurveying the area because edits have been lost. I wonder if this is possible at all. Behind the scenes, I would have to compare the old CC-BY-SA data with the new data set to find out what happened. My tiles would be a derived work from the CC-BY-SA data set and as such licensed CC-BY-SA, no problem there. However, I would in all likelihood be creating an interim database derived from the new ODbL data set and the old CC-BY-SA data set. ODbL would require that I release that database under ODbL. But CC-BY-SA requires that if I release the database it must be under CC-BY-SA exclusively. Thus I cannot release the database, thus I cannot publish the tiles. Right? Bye Frederik -- Frederik Ramm ## eMail frede...@remote.org ## N49°00'09" E008°23'33" ___ legal-talk mailing list legal-talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/legal-talk
Re: [OSM-legal-talk] Mixing ODbL and CC-BY-SA databases
On Sat, Jul 17, 2010 at 6:54 PM, Frederik Ramm wrote: > Hi, > > here's an interesting one. > > Suppose OSM has just changed its license to ODbL. A final CC-BY-SA planet > has been released, non-relicensed data has been removed from the servers, > and the project is again humming along nicely (relief!). > > Now I would like to make a slippy map overlay where areas are coloured red > or green or different shades in between according to how much data is > missing from the current ODbL dataset compared to the old CC-BY-SA data set. > The idea being, if an area is red, it may be worth going there and > resurveying the area because edits have been lost. > > I wonder if this is possible at all. Behind the scenes, I would have to > compare the old CC-BY-SA data with the new data set to find out what > happened. My tiles would be a derived work from the CC-BY-SA data set and as > such licensed CC-BY-SA, no problem there. However, I would in all likelihood > be creating an interim database derived from the new ODbL data set and the > old CC-BY-SA data set. ODbL would require that I release that database under > ODbL. But CC-BY-SA requires that if I release the database it must be under > CC-BY-SA exclusively. Thus I cannot release the database, thus I cannot > publish the tiles. Or you create a thin-line style and render both tile sets without a background color One set red, one set green, both 50% transparent. Then you allow the user to combine the two tile sets, one over the other, in the browser. You don't compare or mix the data bases. The user is looking at produced works, ccbysa for the ccbysa tiles, your choice for the ODbL tiles. And the user has the option of republishing the overlay as long as they follow your licensing requirements. Or, just use them for personal reference and go mapping. How hard was that? Frederik posts many wonderful hypothetical situations. ;-) ___ legal-talk mailing list legal-talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/legal-talk
Re: [OSM-legal-talk] Mixing ODbL and CC-BY-SA databases
On Sat, Jul 17, 2010 at 7:05 PM, Richard Weait wrote: > Frederik posts many wonderful hypothetical situations. ;-) > Here's a completely hypothetical situation. What if I want to import OSM POIs into Wikipedia. Wikipedia is, of course, under CC-BY-SA. ___ legal-talk mailing list legal-talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/legal-talk
Re: [OSM-legal-talk] Mixing ODbL and CC-BY-SA databases
On Sat, Jul 17, 2010 at 7:05 PM, Richard Weait wrote: > The user is looking at > produced works, ccbysa for the ccbysa tiles, your choice for the ODbL > tiles. > Here's another completely hypothetical situation. What if I use CC-BY-SA for the ODbL tiles. And then someone else converts those tiles back into a database? ___ legal-talk mailing list legal-talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/legal-talk
