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. > > Do you have any other ideas? > > Ask for local experts. I have maintained a list of places in East Yorkshire in the wiki. There are about 280 villages and hamlets. I've visited almost 90% to map them and assess if they are really still a place. Many have been added from NPE and they just don't exist on the ground any more. I then judge village versus hamlet on criteria, like size, is there a school, church, shop etc. and what does the Wikipedia entry or other web sites say. I then add local knowledge.
Having done this work I would prefer that a bulk upload doesn't add places in the county without prior discussion. You would probably be able to find someone to do a sanity check like this for many (most? all?) areas. My experience is that sources of UK places need human intervention to make them useful. Cheers, Chris _______________________________________________ Talk-transit mailing list Talk-transit@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-transit
