[OSM-legal-talk] Removal of CC-SA-BY licensed data from OSM after ODbL takes effect

[Frederik Ramm]

Hi,

80n wrote:
> The key phrase is "cannot be contacted" and the import being that if 
> they were contactable they would probably agree to the new license.  If 
> they subsequently make contact and don't agree to the new license then 
> they can legitimately claim that their copyright is being infringed and 
> their data would be removed at that time.

Plus any data that has been derived from their data, as described in 
Ævar's example?

If you assert the copyrightability of even the smallest contribution, 
then you will have to choose a very narrow definition of what consists 
a derived work. Ohterwise it would probably only need a handful of 
non-consenting users who contributed to the London dataset back in 2006 
to basically have to remove all London data today.

Bye
Frederik