Plusbus zones are polygons which are unrelated to the road network - so for Rye it covers a large polygon defined by straight lines linking each pair of adjacent nodes on the source list of defining points. The representation of this "along the roads" is inappropriate - and certainly not how it should be should be shown in terms of the zone definition intended.
The Rye example is a particularly extreme example, as there are few roads in the area with bus routes - and lots of marshland and open countryside covered by the Plusbus zone. Roger -----Original Message----- From: talk-transit-boun...@openstreetmap.org [mailto:talk-transit-boun...@openstreetmap.org] On Behalf Of Christoph Böhme Sent: 02 August 2009 00:24 To: Thomas Wood Cc: Public transport/transit/shared taxi related topics Subject: Re: [Talk-transit] Naptan import Thomas Wood <grand.edgemas...@gmail.com> schrieb: > 2009/7/30 Christoph Böhme <christ...@b3e.net>: > > Thomas Wood <grand.edgemas...@gmail.com> schrieb: > >> 2009/7/29 Christoph Böhme <christ...@b3e.net>: > >> > I transformed the Plusbus Zones into a josm-file (XSLT is > >> > cool :-). Thomas can you import it using the naptan-user if no > >> > one objects to the tagging scheme? > >> > > >> > http://www.mappa-mercia.org/nptg/plusbuszones.osm.gz > >> > > >> > Cheers, > >> > Christoph > >> > > >> > _______________________________________________ > >> > Talk-transit mailing list > >> > Talk-transit@openstreetmap.org > >> > http://lists.openstreetmap.org/listinfo/talk-transit > >> > > >> > >> That looks fine, the only issue is that none of the polygons are > >> closed! > > > > Oh, good that you noticed this. I fixed the file and uploaded it > > again. > > > > Christoph > > > > I have run JOSM's validator over it to clean up some duplicate ways, > and the more obviously incorrect polygon geometries (West Mids had a > weird doubleback by the look of it) a few have overlapping segments, > but I've chosen to ignore their 'errorness'. > > http://www.openstreetmap.org/browse/changeset/2008301 Good idea to use JOSM's validator, I should have done it myself ... The incorrect geometries are converted directly from the NPTG data. Some of the polygons there have duplicate nodes. Removing the duplicate nodes was a sensible choice, I think. I had a look at the very distorted Plusbus Zone for Rye. Its strange shape seems to stem from the fact that it simple spans four villages and follows the road between them. I think there are similar reasons for the other errors. Thank you checking and importing the changeset! Christoph > -- > Regards, > Thomas Wood > (Edgemaster) _______________________________________________ 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
