[SWLUG] Openstreetmap, relicensing and remapping

[Steve Hill]

On 08/02/12 21:17, Philip Barnes wrote:

> If the terms are not accepted on April 1st any ways added by a
> contributor who has not accepted will be deleted, or if they have merely
> edited a way created by someone else it will return to its earlier
> state.

I've been aware of this for some time, although not looked into the 
discussions in depth.  I'm somewhat confused as to how they are doing 
all this:

OSM have always held that using another map in any way (e.g. referring 
to copyrighted OS maps or Google Earth for hints) is not allowed as the 
resulting OSM data would be considered a derived work.  By extension, a 
lot of the ODbL licensed OSM data will have been created by referring or 
modifying existing CC-BY-SA licensed OSM data, so why do they not 
consider it a derived work (and therefore not relicensable)?

Also, has anyone figured out what proportion of the data will be lost as 
a result?

-- 

  - Steve