[OSM-legal-talk] redraw from CC-BY-SA tiles and ODbL data

Simon Poole simon at poole.ch
Sun Jan 4 09:54:25 UTC 2015

Am 31.12.2014 um 18:14 schrieb Lars-Daniel Weber:
> Are these objects to be released in ODbL and have they to be given back to the community?
> Since the CC-BY-SA tiles might have some generalisation (smoothing, selection), this license also has to be encountered.

IMHO it really depends on what your users are doing:

- tracing elements from the background and extracting naming etc in a
systematic fashion (outside of what is covered by non-substantial): the
licences apply (given that the only sane reason to do this would be to
circumvent the licence, yes the licence applies)

- drawing/adding something with only no reference to the background (for
example a new building or a POI from GPS data): independent data.

- doing the above using the OSM data as a reference: grey area.

An example why the later is a grey area: you could easily use an OSM
based background map to determine what is missing and what is already in
OSM to generate a dataset that you could then provide as "OSM+" or so.
This is likely something that the community would feel uneasy about and
I personally would at least view as trying to work around the licence.
On the other hand I'm sure there are a number of use cases were such use
is unproblematic.


-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 488 bytes
Desc: OpenPGP digital signature
URL: <http://lists.openstreetmap.org/pipermail/legal-talk/attachments/20150104/1909386f/attachment.sig>

More information about the legal-talk mailing list