[Talk-lt] secondary/tertiary in proposed definitions at WikiProject Lithuania

[Mateusz Konieczny]

https://wiki.openstreetmap.org/wiki/Lithuania page has a proposed
schema for road classification and as far as I see
https://wiki.openstreetmap.org/wiki/Lt:WikiProject_Lithuania has
equivalent proposal


Some parts are a bit suspicious and likely to result in problems
(rigid adherence to official road classification seems to be proposed,
and official road classes at least sometimes completely mismatch
their actual importance)


But especially

"
The following mapping is proposed:
secondary -- county roads (paved)
tertiary -- county roads (unpaved)"
"

has problematic results where treated robotically:
highway=tertiary with small paved segments ends being tagged
with isolated highwa=secondary what makes no sense and
is extreme oddity.

Note that highway=* road values such as primary/secondary/tertiary/unclassified
are about road role/importance and not direct tagging of road quality
and such disjointed road classes are odd at best

It seems that such approach to road classification is considered as weird
not only by myself, see 
https://wiki.openstreetmap.org/wiki/Talk:Lt:WikiProject_Lithuania

See for example 
https://www.openstreetmap.org/way/518530445#map=16/55.6427/22.4486 <https://www.openstreetmap.org/way/518530445#map=16/55.6427/22.4486&layers=N>
https://www.openstreetmap.org/way/757876997#map=16/55.9277/24.0718 <https://www.openstreetmap.org/way/757876997#map=16/55.9277/24.0718&layers=N>

(I sadly found about it via drama in which I also participated , see 
https://lists.openstreetmap.org/pipermail/talk/2022-June/087549.html
(that is how I become aware of that in the first place)
and
https://www.openstreetmap.org/changeset/121943595https://www.openstreetmap.org/changeset/121951869
https://www.openstreetmap.org/user_blocks/6043
)

I made https://www.openstreetmap.org/changeset/121951869 edit as
this classification schema was described at OSM Wiki page
as proposal.

If, for some reason, Lithuanian community supports creating
such unusual disjointed highway=secondary fragments it would be 
useful to clarify it. Though I want to note that such tagging 
is extremely weird, unusual and mismatching how road classication
works in OSM.

I am not proposing a new tagging schema, but I would at least considering
that short isolated strips of paved highway=tertiary should not be upgraded 
to disjointed highway=secondary (surface=paves/asphalt/concrete/... obviously
still should be tagged on such roads to provide surface data).

It seems to have no benefits whatsoever and is problematic from cartographic,
consistency, QA and other perspectives.

I would also consider using in general highway=secondary to be used as indicator
of importance, not as surface=paved - and from looking through Lithuania
it seems that some quite small roads like
https://www.openstreetmap.org/way/243485255#map=15/55.7693/24.0950
are getting tagged as highway=secondary

And more widely - rigidly basing highway=* road classification on official
schema will cauyse problems, and should have escape hatch at least for
cases where official classification is blatantly wrong.

PS Ideally, road classification would not change on borders:
https://www.openstreetmap.org/#map=17/54.22583/23.38369
https://www.openstreetmap.org/#map=17/54.09060/23.51764 <https://www.openstreetmap.org/#map=17/54.09060/23.51764&layers=N>
https://www.openstreetmap.org/#map=17/54.38052/22.81872 <https://www.openstreetmap.org/#map=17/54.38052/22.81872&layers=N>
https://www.openstreetmap.org/#map=17/54.39621/22.92510
this road is not magically losing/gaining importace and it would be
nice to discuss such cases to have continous road classes
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