[Talk-GB] Maxspeed tagging for the UK
osm at raggedred.net
Wed Apr 6 15:02:29 BST 2011
On 06/04/11 14:22, Peter Miller wrote:
> Do we have a preference for tagging unrestricted limits in the UK? I
> say that because a section of the A1 is beginning to look a bit war
> damaged (as in edit war).
> It started with maxspeed=national. I changed it to maxspeed=70 mph.
> Christcf then added a 'source:maxspeed = UK:nsl_dual' and also
> 'FIXME:nsl = inferred dual-carriageway NSL - remove this tag once
> verified; if this is a Special Road, remove the source:maxspeed tag
> and add motorroad=yes'. And now c2r has changed maxspeed back to national!
> Here is the way in question:
> My preference is to put a numeric speed in the maxspeed field and
> something like 'UK:nsl_dual' in source:maxspeed field, however I am
> not that keen on a prolonged edit war on this and want to gauge wider
> If it is ok to put something like 'national' in the maxspeed field
> then what text options are appropriate for the UK? 'national' seems
> too vague. 'UK:national' or 'GB:national' would fit with the
> recommended structure as would 'UK:motorway', 'UK:nsl_dual' and
> 'UK:nsl_single' however I can find no guidance on that.
> Assuming we are supporting these second format then where should the
> look-up table be that gives the values? This page is having a go at it
> but doesn't seem to be doing a very good job!
> Incidentally, I have also updated the key:maxspeed wiki page so that
> it more clearly represents the tagging recommendations and options
> available, in particular it presents the two options for encoding
> implicit speed limits well. Can people see if they agree with current
> representation of opinion.
> Any thoughts?
I think we should tag what we see on the ground. The sign is national
speed limit, not 60 or 70 mph. The black & white sign does not mean 60
mph or 70 mph for every vehicle, lorries have lower limits for example.
I currently don't tag maxspeed on national speed limits, but this
absence encourages the nonsense that chriscf came up with, so if pushed
I'd use maxspeed:national . All of the roads being discussed are in the
UK, so they do not need UK: or GB: namespaces. This is a geo-database
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