[josm-dev] Cardinal Directions Changes

[Jo]

forward/backward are not exactly deprecated. They are very useful for
walking/cycling routes.

For PT, you have a sequence of stops the bus serves. To do this, there is 1
sequence of ways the vehicle travels on from start to terminus. When using
forward/backward in this case, they get in the way.

The way back has a sequence of stops on the other side of the road, so most
of them will be different objects in OSM. forward_stop and backward_stop
were used in the past, but it gets really messy to try and do maintenance
on such route relations as there is no overview. It's one of the things I
like about the new PT scheme. (on condition all the ways go first, then all
the stops in the order they are served, if a stop gets served twice it is
in the relation two times).

Jo


2013/12/20 Simon Legner <simon.legner at gmail.com>

> Hi Jon!
>
> If possible, please respond to previous messages to keep them nicely
> threaded in mail programs / list archives.
>
>
> On 20/12/13 16:58, Locke, Jonathan wrote:
>
>> Anyway, before the OSM community considers accepting this information, it
>> has a quite reasonable expectation that JOSM should fully support cardinal
>> directions so people can work with them. I'm just trying to figure out
>> exactly what that support would entail so I can implement it.
>>
>
> Usually, it is the other way round: JOSM supports those features and
> mapping techniques that are commonly used by the mappers.
>
> In my impression, north/south/… is quite different from forward/backward.
> Most of JOSM's handling of the roles forward/backward related to
> determining in which way those ways are traversed by the specific
> bus/train/* routes, and sorting the relation members accordingly. These
> aspects seem trivial to me for north/south/… since all relation members are
> oneways and only traversed in that direction.
>
> Btw: the newer public transport scheme basically deprecated
> forward/backward in favour of separate relations per direction. How does
> the US highway mapping relate to this scheme?
>
> Cheers,
> Simon
>
>
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