[talk-au] highway=motorway_junction

Ian Steer iansteer at iinet.net.au
Mon Feb 24 03:32:09 UTC 2020

sorry, yes – it’s lacram_telenav.


The changeset that caught my eye is 67193952


I just don’t understand what they’re trying to achieve.  There are gazillions of such intersections to be done if they head down this path.


I see that it is a member of a relation called destination_sign (3286190), which has lots of information about the signage on this exit.  Do they need to have the motorway_junction tag to record these details about the signage ??  - and why wouldn’t they be using destination= ?





From: Andrew Harvey <andrew.harvey4 at gmail.com> 
Sent: Monday, 24 February 2020 11:14 AM
To: Ian Steer <iansteer at iinet.net.au>
Cc: OSM Australian Talk List <talk-au at openstreetmap.org>
Subject: Re: [talk-au] highway=motorway_junction


I don't really see the point of motorway_junction unless that exit has a name or number (ref), however it's still valid per the wiki as on nodes at which you can exit the highway, I think to avoid putting it on absolutely every intersection we should reserve it's use for highway=motorway or trunk/primary which have grade separated exits.


So based on what you've said, it does sound okay, but if you could link to a few changesets that would help?


Is that username lacram_telenav instead of lacrom_telenav? Per https://wiki.openstreetmap.org/wiki/Telenav it looks like they are no longer working for Telenav, so if there is an issue or question we'll need to contact Telenav at eu-map-analysts at telenav.com <mailto:eu-map-analysts at telenav.com>  for any questions.


On Mon, 24 Feb 2020 at 13:11, Ian Steer <iansteer at iinet.net.au <mailto:iansteer at iinet.net.au> > wrote:

lacrom_telenav has been adding highway=motorway_junction tags on exits from major roads around Perth – I think to designate destination signs.  It is associated with “noref=yes”


The wiki says:


Use the  <https://wiki.openstreetmap.org/wiki/Key:highway> highway=motorway_junction tag to identify a point along a  <https://wiki.openstreetmap.org/wiki/Key:highway> highway=* with junction refs or names where it is possible to exit the highway onto another road. This is usually found along a  <https://wiki.openstreetmap.org/wiki/Key:highway> highway= <https://wiki.openstreetmap.org/wiki/Tag:highway%3Dmotorway> motorway, but is also applicable to other roads with numbered or named junctions including some  <https://wiki.openstreetmap.org/wiki/Key:highway> highway= <https://wiki.openstreetmap.org/wiki/Tag:highway%3Dtrunk> trunk and  <https://wiki.openstreetmap.org/wiki/Key:highway> highway= <https://wiki.openstreetmap.org/wiki/Tag:highway%3Dprimary> primary roads.


The instances I have noticed are not on roads with named or numbered exits, therefore I am thinking this tag is inappropriate.  (I noticed it because it shows-up as an “e” on my GPS – which is a rendering issue I know)


The wiki also says:


 <https://wiki.openstreetmap.org/wiki/Key:name> name=* for the name of the junction or interchange. Do not confuse the name of a junction with the destination(s) the junction leads to. In most cases worldwide, sign information describes destinations, not the name of the junction or interchange itself. If a signpost or indication displays destinations exclusively, this data belongs to  <https://wiki.openstreetmap.org/wiki/Key:destination> destination=* tags, not the  <https://wiki.openstreetmap.org/wiki/Key:name> name=* of the  <https://wiki.openstreetmap.org/wiki/Key:highway> highway=motorway_junction node.


I tried messaging this user a week-or-so ago and have had no response.


What do people think about this tag?  I don’t know what he is trying to achieve.



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