On 27 Jul 2009, at 22:14, Christoph Böhme wrote: > Hi > > "Roger Slevin" <ro...@slevin.plus.com> schrieb: > >> Locality Classification was added as a possible "nice to have" to the >> version 2 schema but it has not been populated, and no guidance has >> been created to indicate how this field should be used (save for a >> table of permitted values). There is no classification data in NPTG >> other than that which comes from the source - and that is only there >> because it could be ... I would not recommend its use as it is flaky, >> and offers nothing in respect of newly created locality entries in >> the Gazetteer. > > So, it looks like we will not have any classification information. > Unless we just want to import the plain names this will complicate the > import a bit as we have to somehow map the locations to OSM place- > types. > At the moment I am having three ideas how we could do this: > > Based on the parent relationship we could guess if a location might > be a suburb or village. > > Many places have wikipedia entries (even villages). If we can manage > to automatically look the entries up and extract the relevant > information (population size) from the info box we could probably > classify a lot of places. > > The landsat data might give us some hints about the size of places. We > just need to find a way to retrieve this information automatically :-) > > Alternatively we could just invent a value for unclassified places and > wait for people to classify the places. >
It seems that the NPTG data is less useful than it could have been because the the lack of classification data. We do of course also have access to locality names from other sources including NPE maps for places that are more than 50 years old and our eye-balls. Possibly we just provide NPTG data as a useful 'free' data overlay for creating localities in OSM in association with data from NPE but don't spend too long trying to do an automatic import of that data. You mention matching localities up with Wikipedia. I see no licensing issues with using data from Wikipieda as far as I am aware btw. Would be great to tie places up with Wikipedia and possibly also with woeids (http://developer.yahoo.com/geo/geoplanet/) but that could be something for later. Regards, Peter > Do you have any other ideas? > > Cheers, > Christoph > > _______________________________________________ > Talk-transit mailing list > Talk-transit@openstreetmap.org > http://lists.openstreetmap.org/listinfo/talk-transit _______________________________________________ Talk-transit mailing list Talk-transit@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-transit
