https://wiki.openstreetmap.org/wiki/Talk:Tag:railway%3Dstop https://wiki.openstreetmap.org/wiki/Tag:railway%3Dstop >Saturday, November 14, 2020 5:08 AM -06:00 from Alan Mackie ><[email protected]>: I think under PTv2 the point you board/alight is meant to be marked as a platform even when it's just a pole in muddy ground. I have also seen recent proponents say that stop positions are not compulsory although I think on one of the first things I saw on PTv2 was strongly of the view that mainly using stops over platforms was one of its main advantages. For the 66/66A question: I think under PTv2 each direction for each variant is meant to have its own route relation which is then combined into a route_master relation. I would assume that if you have an interval that applies across variants you would put that in the route_master rather than the individual route. Take what I say with a grain of salt though, while I do my best to map/update stops I find it very difficult to stitch information displayed on stops into meaningful relations, especially when I've looked at the various stops on different days. > >On Fri, 13 Nov 2020 at 22:54, ipswichmapper--- via Tagging < >[email protected] > wrote > >>Hello, I have quite a few questions about Public Transport related tagging in >>Openstreetmap. >>* My first question is about the "interval:conditional" & "opening_hours" >>tag for bus routes. The "Bus Route" page on the OSM wiki mentions this tag, >>but the train route or "public transport" route page does not mention this >>tag at all. So I wanted to ask, is this tag discouraged? >> >>The disadvantage of this tag, obviously, is that it is quite difficult to >>maintain. However, I think it is possible. My method would be to make a table >>which contains all the public transport route relations in an area, and add a >>column for "last checked". This would display the last date that this public >>transport route was checked. Regular mappers can do a check of a bunch of >>public transport routes every few months to see if the opening_hours or >>interval:conditional has changed. (I plan on including this on a guide to >>mapping public transport routes that I will be making). >> >>Here is the table for Ipswich: >> >>https://wiki.openstreetmap.org/wiki/Ipswich#Public_Transport_Version_2 >> >>Note currently, this is not formatted how I described. The reason for this is >>because not every bus routes has been added, so instead of having a "last >>checked" column, there are four columns ("interval", "interval:conditional", >>"duration", "opening_hours"). This is because some of the unfinished routes >>still don't have these tags. >>* Second question is about mapping train route stops. If I understand >>correctly, you are meant to add the platform at which people wait with role >>"platform" as well as the stop position of the train with role "stop". >> >>I see issue with this. Firstly, none of this is clarified on the wiki under >>train routes. Secondly, what if you don't know what platform the train will >>leave from? What if there is no platform? In the UK this isn't a problem as >>all train stations have platforms. However, in other countries, in rural >>areas, train stations may not have any built up platform, you just wait by >>the side of the railway. >> >>Secondly, why do you have to map stops and not platforms? Again, if the train >>goes at different platforms, then the stop position will also be different. >>You may not know what the stop position is, in which case you chose a random >>point on the railroad. Instead, it would be much better if you could just >>mark the "station" as a member of the relation. However, there is no >>"station" role, so adding a station creates a role verification problem. >>* Last question is about "combining intervals". This is something that, if >>needed, can be asked about in another thread (as it needs more discussion). >>In many cases, multiple bus routes go down the same path for a significant >>section of their journey, and split near the end of their journey. An >>example of this is route 66 & route 66A in Ipswich. [1][2][3] >> >>For most of their journey, these buses have the same route. Combined, their >>interval is "every 20 minutes". The interval of 66A is every hour. The 66 has >>a 20 minute interval, then a 40 minute one, then a 20 min one, etc. >> >>If these were mapped separately, you a routing software wouldn't be able to >>compute that the interval is 20 minutes. So how can this be fixed? >> >>The solution I can think of is to map a separate relation called ("66/66A") >>which is the combined route and give it a interval of 20 minutes. However, >>I'm pretty sure some tags would be needed to be made for this, because >>otherwise it breaks the ground rule (as there is no bus called "66/66A" in >>real life). >> >>Another interesting idea was suggested in this Reddit post: >> >>https://old.reddit.com/r/openstreetmap/comments/jkdsjr/common_area_of_bus_routes/ >> >>That is that roads with multiple bus routes can be tagged with the bus route, >>instead of the other way route (to cut down on repetition). >> >>Thanks, >> >>IpswichMapper >> >>[1]: https://www.openstreetmap.org/relation/190701 >>[2]: https://www.openstreetmap.org/relation/9984463 >>[3]: >>https://www.firstgroup.com/uploads/maps/FEC-Ipswich%20Reds%2066%20-%20Bus%20Times%20from%2025-10-20.pdf >_______________________________________________ >
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