[OSM-talk] Recent spikes in the use of road key

Bert -Araali- Van Opstal bert.araali.afritastic at gmail.com
Wed Mar 3 20:51:11 UTC 2021

OK, what I found on the Taiwan issue with the use of road_name:

The key road_name is used on pedestrian crossings.  All of them are 
mapped correctly as nodes being part of a highway, however the road_name 
on the crossing nodes (1997 in total) is different from the name tag on 
the highways. So it is not clear. No indications if it is an automated 
import since all other keys are very much OK.
I asked the user to change it.

Although they seemed to be related as they appeared around the same time 
and to the same extend as the spikes in the road key, they are not 
related. No road key was used in these changesets.

So still need some research to be done on the road key spikes.


Bert Araali

On 03/03/2021 22:31, Pierre Béland wrote:
> Yes this is more Quality problem.  I did removed the duplicated 
> road=class with same class as highway. All where valid highways.
> Pierre
> Le mercredi 3 mars 2021 13 h 41 min 35 s UTC−5, Bert -Araali- Van 
> Opstal <bert.araali.afritastic at gmail.com> a écrit :
> I agree, didn't say it is a violation (yet).
> Combinations of the suspicious keys:
> road_name = 
> https://taginfo.openstreetmap.org/keys/road_name#combinations 
> <https://taginfo.openstreetmap.org/keys/road_name#combinations>
> road = https://taginfo.openstreetmap.org/keys/road#combinations 
> <https://taginfo.openstreetmap.org/keys/road#combinations>
> All seem to be in my opinion incorrect use and appeared massively in a 
> very short time.
> On 03/03/2021 21:27, Pierre Béland wrote:
> We see a spike yes in objects references with road=*.   But we need to 
> know what type of object they are describing. This tag can be the main 
> tag that wants to refer to roads, or this can be a secondary tag used 
> with a tag like historical=yes, memorial=*, etc.
> Look for example at https://www.openstreetmap.org/node/2209159511 
> <https://www.openstreetmap.org/node/2209159511>
> For the Taginfo chronology, the map shows the distribution and we see 
> a lot of objects with road=* in Germany.  Suspecting more of these,
> Below a short analysis with Overpass queries to compare usage for 
> nodes and ways comparing part of Europe with part of Africa.  In 
> Germany, we observe that the tag  "historic": "milestone" is often 
> used on nodes with road=Road name. In Africa, we find more ways that 
> probably refer to highways.
> West Europe, 187 nodes https://overpass-turbo.eu/s/14vb 
> <https://overpass-turbo.eu/s/14vb>
>                       79 ways https://overpass-turbo.eu/s/14vc 
> <https://overpass-turbo.eu/s/14vc>
> Africa,               4 nodes https://overpass-turbo.eu/s/14vf 
> <https://overpass-turbo.eu/s/14vf>
>                      338 ways https://overpass-turbo.eu/s/14ve 
> <https://overpass-turbo.eu/s/14ve>
> As you see, we need deeper analysis to find where this spike comes from.
> regard
> Pierre
> Le mercredi 3 mars 2021 12 h 55 min 16 s UTC−5, Bert -Araali- Van 
> Opstal <bert.araali.afritastic at gmail.com> 
> <mailto:bert.araali.afritastic at gmail.com> a écrit :
> Taginfo link for chronology: 
> https://taginfo.openstreetmap.org/keys/road#chronology 
> <https://taginfo.openstreetmap.org/keys/road#chronology>
> On 03/03/2021 20:33, Bert -Araali- Van Opstal wrote:
> Just the key "road=*", search for road in Taginfo tab KEY.
> In Taginfo I searched for the key, got a long list with all kinds of 
> keys containing the word "road", then selected just "road" from the 
> list returned by taginfo.
> If you go to chronology tab you see the spikes very clearly.
> Greetings,
> Bert Araali
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