Hi, Jukka Rahkonen wrote:
There can be a little problem if municipalities are also selling their geodata. For sure municipalities can use dual license for the original data
This is a complex topic in itself; some governments might say "you can have the data, it is for noncommercial purposes only but you said you are noncommercial...?" and then you have to explain that yes, we are noncommercial but the data we collect can be used commercially...
If you get something in writing, the best thing to get is something where they allow you to use their data "for publication as part of OpenStreetMap". That would then include the current and any future license. Do not under any circumstances accept data that is released "under CC-BY-SA" as this is a dead-end that will require re-negotiation soon.
but what happens if they want to update their own data with OSM user contributions? Would the whole updated dataset become share alike as well?
Under both the current and the new license, yes, that would make their own data share-alike. What you can do, however, is collect errors in their data on a separate wiki page where you clearly say that the wiki page content is meant to be given to them to improve their data - then mappers who find major bugs can add these to the wiki page and the city council gets a nice list afterwards. We did that once when we got a lot of official data:
http://wiki.openstreetmap.org/wiki/Import/Catalogue/Strassen_NRW/Unstimmigkeiten Bye Frederik _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
