Licence and Legal FAQ/Why CC BY-SA is Unsuitable: Difference between revisions

There have been a number of cases where companies have looked to use OSM or OSMderivedOSM derived information, but their lawyers have recommended against use of our maps [http://www.npemap.org.uk/FAQ.html#openstreetmap]. Their concerns were due to the unclear boundary between collective and derived works; does the derived work extend only to the base map, the base map plus any overlays, or to the work around it such as a news show or a book? Whilst a community guideline exists on our wiki, the fact that there are tens of thousands of copyright holders means that statements made on the wiki or by OSMF cannot be authoritative, leaving the possibility that any one contributor may claim that there is a failure to properly comply with CC BY-SA. This is a risk that many companies find off-putting.