[OSM-legal-talk] osm-carto license

[Christoph Hormann]

On Thursday 25 August 2016, Martin Koppenhoefer wrote:
>
> In the style sheet the license is indicated as CC0:
> https://github.com/gravitystorm/openstreetmap-carto/blob/master/LICEN
>SE.txt
>
> But on the website it says that the "cartography" is licensed ccbysa:
> http://www.openstreetmap.org/copyright
>
> "The cartography in our map tiles, and our documentation, are
> licensed under the Creative Commons Attribution-ShareAlike 2.0
> license (CC BY-SA)."

Cartography is data combined with the generic styling rules.

Since the rendered tiles are therefore subject to the style license 
(think of icons, patterns etc. for example) as well as the data license 
the CC-By-SA makes a lot of sense since it implicitly includes the ODbL 
attribution requirements.  Most other licenses for the tiles would 
require a special clause for that.

The style itself however does not require attribution when used with 
non-OSM data since it is CC0.

You can still render tiles using the standard style and OSM data 
yourself and distribute them under something other than CC-By-SA as 
long as you comply with the ODbL.  But if you use those rendered by the 
OSMF servers they are CC-By-SA.

-- 
Christoph Hormann
http://www.imagico.de/