[OSM-talk] Highway=trunk : harmonization between countries ?

Fernando Trebien fernando.trebien at gmail.com
Sat Feb 24 02:47:19 UTC 2018


On Fri, Feb 23, 2018 at 7:30 PM, Matej Lieskovsk√Ĺ
<lieskovsky.matej at gmail.com> wrote:
> Ok, look here: https://www.openstreetmap.org/#map=16/50.3124/13.8720
> The highway=trunk section is a bypass built to motorway specification. It is
> not even a motorroad, because it is so short, but the change in the
> character of the road is immense - it goes from 2 lanes to 2+2 lanes with a
> median, gets wider borders, no pedestrians, cyclists or agricultural
> vehicles allowed... The fact that it is drawn as a trunk road hints at all
> these changes.

You could also map it with lanes=4+foot=no+bicycle=no+agricultural=no
and let the renderer decide whether these things are worthy of special
representation or not.

As a map user, I'm left with a bad impression of a map with such
discontinuities, it looks messy and unprofessional. None of the
commercial alternatives to OSM have such artifacts. You may also look
for other maps of Czechia on Google Images and most won't show
artifacts like that either. Also look at the classification of
England, Australia and Russia in OSM and you won't find any similar
artifacts. I doubt their roads never change structure over long
distances.

> On 23 February 2018 at 23:18, Fernando Trebien <fernando.trebien at gmail.com>
> wrote:
>>
>> Wouldn't the estimate change often? We usually don't like that in OSM. [1]
>>
>> [1]
>> https://wiki.openstreetmap.org/wiki/Good_practice#Don.27t_map_temporary_events_and_temporary_features
>>
>> On Fri, Feb 23, 2018 at 7:11 PM, Matej Lieskovsk√Ĺ
>> <lieskovsky.matej at gmail.com> wrote:
>> > A "traffic" tag sounds like a good idea, but I'd have two suggestions:
>> > 1) Can we find a better name?
>> > 2) Estimates are better than words. I can imagine what 5000 cars per day
>> > look like, but what is considered heavy traffic in (for example) Brazil?
>> >
>> > I'm all for letting highway tag only worry about high-level stuff
>> > (footway,
>> > cycleway, road, path...)  and have a separate class tag for official
>> > classification where needed.
>> >
>> > I've created this page:
>> > https://wiki.openstreetmap.org/wiki/Highway_classes
>> > Feel free to add your region!
>> >
>> > PS: +1 to Michael's point about not changing classifications in
>> > countries
>> > with an official system.
>> >
>> > On 23 February 2018 at 23:06, Michael Andersen <osm at hjart.dk> wrote:
>> >>
>> >> On fredag den 23. februar 2018 15.31.37 CET Fernando Trebien wrote:
>> >>
>> >> > Assuming the map is correctly classified in Europe, I'm seeing many
>> >> > fragments of motorways and trunks all over the map. Is this an
>> >> > artifact of local definitions? Or is it intentional and desirable?
>> >>
>> >> The "fragments" of trunks you see in Denmark are intentional and
>> >> desirable. We
>> >> follow the official classifications. We will not be happy to see you
>> >> change them.
>> >>
>> >>
>> >>
>> >>
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>> >
>> >
>> >
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>>
>>
>>
>> --
>> Fernando Trebien
>> +55 (51) 9962-5409
>>
>> "Nullius in verba."
>
>



-- 
Fernando Trebien
+55 (51) 9962-5409

"Nullius in verba."



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