[OSM-talk-ie] mapping roads

da fo43 dafo43 at outlook.com
Sat Mar 29 18:09:45 UTC 2014

Thanks for the replies so far, anyone else want to gibe an opinion? To address some of the points:

> Date: Sat, 15 Mar 2014 22:10:12 +0000
> From: Andrew McCarthy <me at andrewmccarthy.ie>> This junction, for instance:
>  	http://www.openstreetmap.org/#map=15/53.0881/-7.1769
>  It would be odd to have all of L3930 marked as tertiary while L39307
>  and L39306 are unclassified, especially since L39307 is now the "main"
>  road.
> - Some roads change for no obvious reason:
>	http://www.openstreetmap.org/#map=15/53.0606/-7.2616
>  The L2133 becomes the L6139 and then the L2133 again. From a driver's
>  point of view it's a single continuous road. Having an isolated bit of
>  unclassified in the middle makes no sense.

Certainly some good examples there but I could say the same thing about Dublin inside the M50.
The former N11 (R138) from Mount Merrion to Donnybrook is better than a lot of national primary
routes but is still (correctly) marked as an R road: http://www.openstreetmap.org/#map=14/53.3095/-6.2129 .
So Dublin has a dual carriage-way with the same importance as Ailesbury Road, a narrow road
with speed bumps.

I'm not against the idea of having routable roads but I think it should be done as part of
a different tag.
> Refs in the form L1234-1 are used, behind the scenes, by councils to
> indicate subsections of the local road L1234. Yes, I did read this on the wiki (thanks for the detailed information). What I'm talking about is the ref tag.

> Date: Sun, 16 Mar 2014 00:36:42 +0000
> From: Ken Guest <kguest at php.net>
> Changing the tagging of roads based on an arbitrary reason such as an
> assigned L ref value where we presume there is a consistent scheme applied
> to it is mindless. Not all [county] councils assigned values based on the
> quality of the road, I know of at least one where the assigned value is
> based on the electoral division that the road is in.

Would you agree that L1000-4999 are called local primary and L5000-9999 are called local secondary by all county councils?

> Changing the tagging of anything based on the self-perceived notion that
> you know better where in actual fact you might not, is little more than
> mindless vandalism. Good intentions or not. This is why I hope you are
> looking for advice first, here and now, before you change anything based on
> your gut feel.

Or another way of looking at could be that I'm undoing the vandalism caused by other users. The OSM wiki states tertiary as "The next most important roads in a country's system." - http://wiki.openstreetmap.org/wiki/Key:highway

Like I said I didn't intentionally undo anyone's work. How exactly does the current system work, how do I know if I'm on someone's "patch", what if I don't agree with their observations on which road is better?

>"Ground Truth" requires that you map it as you see it, not as how you wish
>you saw it.
>Please don't remove hyphens from where you think they don't belong and add
>them to where you want them. There are enough standards without making up
>more - or I suppose you could say people get confused easily enough without
>adding reformatting into the mix.So I should change the R138 back to the N11? That's what I saw on the sign today.


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