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

[Paul Norman]

On 2/6/2016 9:41 PM, Tobias Wendorff wrote:
> I mean, this won't be enough, will it?
> - get OSM data extract from 2016-02-07
> - filter streets
> - get LMA data extract from 2015-12-31
> - open in generalization tool XY with parameters XY

When publicly using a derivative database (or produced work from one) 
you need to share either the derivative database, alterations to the 
original database that form the derivative database,  or contents plus 
method to perform the alterations. The tool isn't really an issue here, 
as you've indicated the external data isn't available under an open license.

It sounds like you have two databases, one the landuse data, the other 
the roads data, together which form a collective database. This might be 
in one file, or more than one file. Because both databases are derived 
from OSM data, by design you have to release them (or another option 
under s 4.6).

Alternately, you might have one database with both landuse and roads 
data, which might be in one file or more than one file, but the results 
are the same.

What you don't have to do is release the original proprietary database 
from the LMA, but it would be able to be partially reconstructed from 
what you do release. Again, this is by design.