Brian
I would be very interested to have the evidence about the transposed stops if that is possible. Thanks. Do you not have access to "bearing" - it's in the source data, but I am not sure what you have access to. I can certainly let you have a file with the bearing data in it, if you do not have access to this from anywhere else. CUS is a fact of life - nothing I can offer in response to that. If stops have been removed - but not removed or replaced in NaPTAN - then I would again like evidence to take back to colleagues who maintain NaPTAN. It is possible that they have changed the stop sub-type from MKD to HAR - that is the preferred method of handling this situation in NaPTAN. A formal HAR record has an entry point, what I call an "anchor" point in the middle, and an exit point. The guidance tells editors that these should all fall on the same named road (but in practice we know that a lot of them do not adhere to this rule). What is almost certainly the case in almost every case is that the length of the HAR section is not the same as the full length of the road ... most well-created HAR records would have entry and exit points which are at least a few metres short of the road junctions at each end. Best wishes Roger From: [email protected] [mailto:[email protected]] On Behalf Of Brian Prangle Sent: 26 May 2009 17:19 To: [email protected] Subject: [Talk-transit] NaPTAN data import in Birmingham update Having surveyed (and resurveyed) about three hundred bus stops I think I could draft (soon) a definitive report on how to proceed. There's also a few points to emerge about the Birmingham data 1. I'm coming across regular transpositon of stops from opposite sides of the road ( would be useful to have bearing data) 2. Not having the CUS marker on customary stops makes for hard work surveying and editing on estates where practically every other stop is CUS 3. Came across two routes (36 and 36C) where whole roads have had their bus stops physically removed (still showing as NaPTAN data) and the timetables show the roads as Hail and Ride zones. Couple of things here - I presume that actual practice has gone beyond the capacity of NapTAN data to keep pace ( I'll add the details to the NaPTAN error log on the mappamercia wiki shortly) and how do we import the HAR data - or represent it ( I can't remember where our previous discussions got to). In the meantime I'll probably just tag the roads as HAR=yes and HAR_route_ref= xx. (Without the timetable there's nothing visible on the ground to indicate to surveyors that they are in a HAR zone) Note for Thomas - I know you're into exam season - none of this is desperate - there's a few thousand more bus stops to survey and verify yet!
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