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

[Tobias Wendorff]

Am So, 7.02.2016, 08:37 schrieb Paul Norman:
>
> 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).

Just to make it clear:
Only streets will be derived from OpenStreetMap data, all other data
are from a proprietary LMA dataset. But the generalization tool creates
an interaction between both datasets. So the LMA dataset will become
part of the / a derived database, won't it?

> 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.

So actually, I'd need to create a changefile (like OSC) between the
original proprietary dataset and the derived dataset, which has
interacted with OpenStreetMap during generalization process. Do I
only need to release this changefile?

I don't think, the generalization software supports storing change
information. Hell, implementing this function will be fun :)