[Tagging] Status of oneway=cw oneway=ccw

[Peter Elderson]

Hm... it's a different subject... but it's much, much more than ordering.
Edits to ways: splitting, lengthening, shortening, combining, adding and
removing, can destroy many routes of different kinds, not only unordering
them but making them unorderable because of duplicate ways, branch ways,
interruptions, faulty roundabouts, breaking roles and turn restrictions.
I'd rather see newbies making mistakes and make them correct those mistakes
themselves, than keeping them away, ignorant and a permanent newby.

But in the end, we should think of a way to prevent this from happening
altogether. If an edit breaks something important, it shouldn't be
accepted, or it should be automatically repaired.

Vr gr Peter Elderson


Op vr 3 mei 2019 om 16:31 schreef <osm at hjart.dk>:

> I prefer that those complete newbies get to mess with only 1 or 2 members
> of route relations, at the relatively small price of ordering.
>
> Peter Elderson skrev den 03.05.2019 16:12:
>
> You prefer routes to stay unordered? Or that edits damage routes?
> Vr gr Peter Elderson
>
> Op vr 3 mei 2019 om 16:08 schreef <osm at hjart.dk>:
>
>>
>> >>> For a non-roundtrip route consiting of two consecutive ways the route
>> >>> direction can be deduced from the order of the ways in the relation.
>> >>
>> >> That's assuming the ways are ordered at all. I've cleaned up hundreds
>> >> of routes (most created by Potlatch users though) and my advice is: do
>> >> not rely on routes being ordered.
>> >
>> > In OSM a relation is by definition an ordered list, see
>> > https://wiki.openstreetmap.org/wiki/Relation :
>> > "A relation is a group of elements. To be more exact it is one of the
>> > core data elements that consists of one or more tags and also an
>> > ordered list of one or more nodes, ways and/or relations as members
>> > ..."
>> >
>> > Also the elevation profiles for the routes (e.g. in
>> > waymarkedtrails.org) only work if the routes are ordered and they
>> > usually look ok, see also
>> > https://wiki.openstreetmap.org/wiki/Relation:route#Order_matters .
>> >
>> > If some editors damage the order in the relations this is a bug that
>> > should be fixed anyway.
>>
>> In order to sort the members of a relation in JOSM, you need to download
>> all of them. The majority of edits to relations involve downloading only
>> 2-3 members. If only 1 member is added or removed, that's how they
>> become unordered.
>> Personally I'd prefer it stays like that, because I've seen complete
>> newbies make some really weird edits to cycleroutes, because they
>> obviously didn't understand what it was.
>> >
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