On 11/2/09, Frederik Ramm <frede...@remote.org> wrote: > Hallo, > > Matt Amos wrote: >>> However, my question is, how far does the share alike >>> section of the Creative Commons licence go. I want to share the map data >>> with OSM but not the other sections of the work. >> >> this lack of clarity is one of the problems with the CC BY-SA license. >> the short answer is: i'm not sure. the longer answer is: the image you >> render to the screen must be CC BY-SA licensed,
the even longer answer is... ;-) > ... not so fast! We generally say that: > > * if you produce an image that contains OSM and other data, then deliver > this image to the client computer, then the whole image is CC-BY-SA. > > but > > * if you produce two different images, one with OSM and one with other > data, and the two are overlaid on the client computer (by software > acting on behalf of the user), then your second image can be licensed > whatever you want. Only if the user (who is considered to have created a > derived product by asking software running on his computer to take two > images and merge them) then further publishes the image - which you may > or may not allow as the image contains your data! - would the image have > to be made CC-BY-SA. does that mean that no-one can redistribute a screenshot of the application? the CC BY-SA portion would imply that the screenshot would be CC BY-SA, but the license on the "other layer" of the image wouldn't allow that. > Otherwise it would not be possible to e.g. overlay OSM data and CGIAR > "noncommercial use only" hill shading in an OpenLayers application. indeed. for what it's worth i think that overlaying data onto CC BY-SA data/tiles is fine. but i'm not so sure about it that i'd make something on that basis without retaining a lawyer! cheers, matt _______________________________________________ legal-talk mailing list legal-talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/legal-talk
