On 19 July 2010 23:37, Graham Jones <[email protected]> wrote:
> Hi Folks, > Given all of the talk on the osm-talk mailing list about the possibility of > losing data if we move to the new licence, I started to wonder just how > widespread OS OpenData use is in OSM. I couldn't find a visualisation, so I > made one this evening which is visible at > http://www.maps.webhop.net/osm_opendata/. Not all zoom levels are > rendered yet - it could easily take most of tomorrow to finish the higher > zoom levels. > > The way I have detected the OS derived data is very crude - basically if > 'source' or 'source:name' matches %os%, the element gets highlighted in > blue. This means that tags relating to out of copyright OS maps might also > be highlighted (I see some 'OS7' tags). > > Anyway, I thought you might be interested in seeing how widespread the use > is - I was very surprised that at low zoom levels, the UK (or rather GB) is > covered in blue, but if you zoom in enough you can start to see which towns > are 'old mapping' and which contain a lot of tracing from StreetView. > > I'm not sure what to do with this now - I will work out some statistics for > how much of the OSM data includes OS opendata. If anyone can think of a > use for it now that I have the database imported, please let me know! > > Well the first thing to say is that the approach is a bit flawed. You would need to look also at the history to find out what is new (completely OS OpenData) or what has been completed with data from OS. It is very likely that some might come from "old mapping". The second point is that I don't see the relation between knowing how much OS OpenData and the switch to the new licence. Talks of losing data is partially a self fulfilling prophecy. It is impossible right now to gauge how much data IF ANY we would lose since we don't have any means to know who is in support of what until the voluntary licence is put in place. Emilie Laffray
_______________________________________________ Talk-GB mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk-gb
