In message <[email protected] m> Brian Prangle <[email protected]> wrote:
> Thomas > I've also looked at Google maps and their alignment is off too in exactly > the same way ours is in areas I know well and have surveyed, so I guess it's > down to the NaPTAN data. There are examples where I know the bus stops are > in a row along the street (Corporation Street and Acocks Green Village for > example) but NapTAN has one or two skewed from the line by several metres. > Currently I favour correcting the NapTAN data to what we know on the > ground, but until a consensus emerges I'm laying off the urge to correct it. > Please hold open the possibility that your improvements to NaPTAN can be fed back to the authorities for them to improvement of the official source. I will not comment specifically on the West Midlands data but in some of the major cities the bus stops were located some time ago before the more accurate GPS as we know it today was available. The data is usally good enough for public transport timetables and navigation but does not always look as good as it should on a map. I also notice that the OSM surveyed stops are put neatly beside the edge of the road whereas the NaPTAN points tend to be further from the road centre line, probably closer to where the kerb actually is. This sometimes gives bus operators problems knowing which road the bus stop is on. -- Peter J Stoner UK Regional Coordinator Traveline www.travelinedata.org.uk a trading name of Intelligent Travel Solutions Ltd company number 3826797 Drury House, 34-43 Russell Street, LONDON WC2B 5HA _______________________________________________ Talk-transit mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk-transit
