On 3 Jun 2010, at 12:20, Ed Avis wrote: > Sam Larsen <samlars...@...> writes: > >> In areas where there has been a huge amount of pedal power mapping >> by some >> very enthusiastic mappers in the Fens north of Cambridge, the data >> in OSM here >> is generally of a very high quality, for this reason i would >> dispute many of >> the OS Locator missing name polygons. I would assume that a number >> of these >> are down to the 'historical' nature of OS data & place names. >> There are a >> number of local names for stretches of A & B roads, which i would >> think are >> probably not signposted or have not even used in the locality for a >> long time >> - these may be covered by historical name tag (which i think does >> exist in >> places). > > Yes, there are often roads like this in the countryside. I tend to > add the > name anyway if there is evidence for its existence in the past or > present. > After all nobody officially strips the name from roads. The name is > still > there, even if 99% of visitors are ignorant of it as they drive > through at > 60mph.
I agree - the OS almost certainly haven't made it up and I assume that the lack of signs is purely because authorities are not legally obliged to put signs up in the countryside as they are in the towns. Personally I think the names enhance the map, even though we no longer go down Wash Lane to do the washing or up Mill Hill to get the flour and even if there is not a sign to give the name. > >> For that reason i would be hesitant to put too much faith in the >> level of >> accuracy using this measure when completeness becomes something >> like 90-95%. > > It depends on the application. There are likely to be older > documents - legal > documents particularly, such as title deeds - which use the name, or > it may > still be valid as a postal address. For users such as local > authorities having > all this stuff is likely to be important. > > I'd also like to '+1' the suggestion of feeding corrections back to > OS. I have > sometimes added note tags to OSM saying that names were wrong, but > that was > based on the Street View tiles. The Locator dataset plus the > not:name tag will > be a good way to streamline the reconciliation process. > > (It would be nice if we could more generally contribute data to the > Ordnance > Survey, which is still the national mapping agency, but I don't hold > out much > hope for getting the legal issues untangled.) It's great to hear other people saying they would like to help the OS get there mapping better - I posed the question on one of the OSM lists a few years ago and got an overwhelming 'no' and 'over my dead body'. I could guess about why the mood is different on this list now, but possibly it is in part that we are now getting something from the OS and would like to return the favour. I will make my contact in the OS aware of this discussion and invite him to respond. Who knows, we may even get official OS participation on this list which would be great. Regards, Peter > > -- > Ed Avis <[email protected]> > > > _______________________________________________ > Talk-GB mailing list > [email protected] > http://lists.openstreetmap.org/listinfo/talk-gb _______________________________________________ Talk-GB mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk-gb
