[OSM-legal-talk] share-alike on generalized data?

[Tobias Wendorff]

Am So, 7.02.2016, 10:52 schrieb Christoph Hormann:
>
> Yes.  Note this works in both ways, if you use OSM street data to modify
> proprietary landuse data this landuse data will be subject to
> share-alike.  Likewise if you use the landuse data to modify the OSM
> street data the modified street data is to be shared.  The latter might
> be permissible by your proprietary license, the former is probably not.

Since the generalization process modifies both datasets in combination
to each other, the former case takes part.

> No, whatever you release must be usable by others to reproduce what you
> did, at least as far as data is intermixed.  If you for example also
> have proprietary POIs in your map which are not modified with OSM
> information these do not need to be made available of course.

I don't agree with this point. The others can buy the proprietary data
at the LMA and apply the changefile to it.

> So if you release a changefile that contains changes to proprietary data
> which itself is not openly available this is useless and irrelevant for
> share-alike.

The changefile of course would we released under share-alike, but not
the base data, on which the changefile could be applied to.

Best regards,
Tobias