> It is more likely that those stops have not yet been integrated in the > relation. But for persons unknown to the local situation, that is > impossible to determine.
Thanks, so I can only extract bus stop in the membemer of the relation for a bus route,right? My original idea of attaching bus_stops to the ways that the bus travel along according to geometry distance may do not make any sense:( Regards, Grace -------------------------------------------------- From: "Maarten Deen" <[email protected]> Sent: Tuesday, February 09, 2010 11:44 AM To: "Shuyan Chen" <[email protected]> Subject: Re: [OSM-dev] Help: Bus Stop Data Extraction for Bus RoutingService > On Tue, 9 Feb 2010 11:36:24 +0100, "Shuyan Chen" > <[email protected]> wrote: >> Many thanks for your reply. >> >> As you mentioned, >>> There might be bus routes which do not stop at a certain bus stop, >>> although >>> its route is going along that way (think of regional buses). >> >> there are many bus routes which do not contain bus_stops in the member > of >> the relation,yet stops exist in the way which the buses travel along. >> >> Does it mean those stops in the ways are not the bus stops for the >> correspondent bus route, and bus route do not have any stops? > > It is more likely that those stops have not yet been integrated in the > relation. But for persons unknown to the local situation, that is > impossible to determine. > > Regards, > Maarten > >> -------------------------------------------------- >> From: "Stephan Plepelits" <[email protected]> >> Sent: Tuesday, February 09, 2010 11:15 AM >> To: "Shuyan Chen" <[email protected]> >> Cc: <[email protected]> >> Subject: Re: [OSM-dev] Help: Bus Stop Data Extraction for Bus >> RoutingService >> >>> On Tue, Feb 09, 2010 at 11:04:31AM +0100, Shuyan Chen wrote: >>>> When we came to extract bus data from the element of “Relation”, we >>>> found the >>>> stopping point data in a relation are always incomplete in bus route >>>> data, >>>> meanwhile, we also noticed there are bus stopping points in the ways >>>> which are >>>> contained in a bus route relation. >>>> >>>> What is the difference between the stop nodes within a relation and > the >>>> nodes >>>> tagged as “bus_stop” in highways which are also contained in a >>>> relation? >>> As I understand it, a node which is a bus stop should be tagged as >>> highway=bus_stop with a name. If a route stop at that bus_stop, it > should >>> be member of that relation. The role should be either stop, > forward_stop >>> or >>> backward_stop, to indicate whether that bus stops at that stop in both >>> directions or either in forward or backward direction (measured along > the >>> way where the node is member of ... often the node is not on the way, > but >>> next to the way). >>> >>> There might be bus routes which do not stop at a certain bus stop, >>> although >>> its route is going along that way (think of regional buses). >>> >>> An interpretation of that data you can see in the OpenStreetBrowser[1]. >>> >>> [1] http://www.openstreetbrowser.org >>> >>> greetings, >>> Stephan >>> -- >>> Seid unbequem, seid Sand, nicht Öl im Getriebe der Welt! - Günther Eich >>> ,---------------------------------------------------------------------. >>> | Stephan Plepelits, | >>> | Technische Universität Wien - Studien Informatik & Raumplanung | >>> | Projects: | >>> | > openstreetbrowser.org > couchsurfing.org > tubasis.at > bl.mud.at | >>> | Contact: | >>> | > Mail: [email protected] > Blog: plepe.at > Jabber: [email protected]| >>> | > Twitter: twitter.com/plepe > Wave: [email protected] | >>> `---------------------------------------------------------------------' >>> >> _______________________________________________ >> dev mailing list >> [email protected] >> http://lists.openstreetmap.org/listinfo/dev > _______________________________________________ dev mailing list [email protected] http://lists.openstreetmap.org/listinfo/dev
