There's a set of motorways surrounding a city. All motorways for the country are either paid (default), or toll-free (where explicitly marked).

Therefore, it makes sense to mark the toll-free motorways as toll=no, as no tagging implies toll=yes in the general area.

Now, I can query Overpass API (from JOSM) - filtering way["highway"="motorway"] gives me all motorways; filtering way["highway"="motorway"]["toll"=*] gives me motorways with explicit toll info. I'm interested in the opposite: in motorways which are not tagged with toll. I haven't found that anywhere in the examples, here, or on the Internet at large.

Is there a way do find "ways that have this tag but not that tag"?

asked 04 May '17, 16:04

Piskvor's gravatar image

Piskvor
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accept rate: 37%


This is possible by using regular expressions and querying for ["highway"="motorway"]["toll"!~".*"].

However it sounds like you are about to perform an automated edit. Can you be really sure that all highways without a toll tag require a fee? I guess there is still a chance that some motorways are missing a toll=yes tag.

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answered 04 May '17, 16:50

scai's gravatar image

scai ♦
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accept rate: 23%

That's what I am looking for, thank you. And on second look, my wording does sound suspicious :) Do not worry, I am not about to mass-edit: I am looking for a tool to check for missing spots. I have recently driven one part of the city's ring road, so now I'm comparing my notes with the DB to see if all the places around the city that are enumerated in a city bylaw and physically marked as "toll not required" are marked as such in OSM. Have been using two JOSM layers, one for toll=yes, other for toll=no, and checking for gaps visually; wondered if there was an easier way.

(04 May '17, 16:57) Piskvor
3

A recent update added a nicer syntax for missing tags, ["highway"="motorway"][!toll].

(04 May '17, 20:19) maxerickson

(btw yes, all motorways without a specific physical tag are toll roads here, by law. What I'm checking is that OSM tagging matches the physical tagging)

(05 May '17, 10:48) Piskvor

And it seems that, in the area I visited, all toll roads have already been correctly tagged as toll=yes; there were some parts left untagged where toll=no was the OTG situation.

(05 May '17, 13:31) Piskvor
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question asked: 04 May '17, 16:04

question was seen: 1,087 times

last updated: 05 May '17, 13:31

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