Christoph Sorry - I now realise I shouldn't have referred to "inactive" localities ... this is something I can see on the editor system for NPTG, but the export only shows the active localities ... the records of the inactive ones are not included in the standard XML file. I would need to check whether it is possible to get an extract from NPTG which includes inactive records (or only comprises the inactive ones) - but that is a question I will only ask if someone can suggest that some useful purpose could be served by having access to that data.
Roger -----Original Message----- From: Christoph Böhme [mailto:christ...@b3e.net] Sent: 28 July 2009 22:54 To: ro...@slevin.plus.com; Public transport/transit/shared taxi related topics Cc: ro...@slevin.plus.com; 'Peter Miller' Subject: Re: [Talk-transit] Naptan import Roger, thank you for your explanations. "Roger Slevin" <ro...@slevin.plus.com> schrieb: > Although NPTG was originally for public transport purposes, we > stressed at all times that a locality should be listed even if it has > no public transport - but we know that some local editors have > probably erred towards marking some unserved rural hamlets as > "inactive". > > All "inactive" localities should still be in the data - so hamlets > which are missing may be in NPTG, but marked as "inactive". What would an inactive entry look like in the data? The xml schema does not seem to define any elements/attributes for inactive entries. > However they may simply never have been in the source data - and no > one to date has recognised the need to add them to NPTG. It would be > interesting to see what localities OSM holds in its data which are > not included in NPTG (as well as the reverse of this) if that is > possible. I created two tables of OSM- and NTPG-only places: http://www.mappa-mercia.org/nptg/nptg-only-localities.csv.gz http://www.mappa-mercia.org/nptg/osm-only-localities.csv.gz I considered a place to be only in one dataset if no place from the other dataset exists in its proximity which has the same name. Proximity was defined as an euclidian distance less than 0.3 between the lat/lon positions of the places (I don't know how this relates to kilometres/miles). Since the OSM data contains some nodes with place-tags that have nothing with actual places, I only included nodes with a place-value of either locality, island, suburb, hamlet, village, municipality, town or city. I also excluded place=farm. Christoph _______________________________________________ Talk-transit mailing list Talk-transit@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-transit
