[OSM-legal-talk] Re: [OSM-talk] about freedom in PD/BSD/MIT/Apache

[Thomas Walraet]

SteveC a écrit :
> Arn't we talking about two different derivative works?
> 
> Is there a sane way we can make the data be share-alike, but use in
> mashups or paper maps etc arn't?

As some people are talking about, just require SA on the "underlying" 
geodata but not on the "rendered" work.

Quoting Richard :
« A successful ShareAlike geodata licence could be based around this 
"source code" provision. You would be required to make the raw geodata 
("source code") available for any derived work that you produce using 
this free geodata. »
http://www.systemed.net/blog/entry060613093350.html


As I see it, most mash-ups only use the data without modification. In 
this case, a link to the OSM website (where the data can be found) is 
sufficient.

If a mash-up let it's user tag segments with useful information, or plot 
error in the layout, then this is considered a derivative work of the 
data and it should be available under a license compatible with OSM license.