[OSM-dev] [PATCH] make JOSM validator plugin ignore unnamed motorway_link

Sebastian Spaeth Sebastian at SSpaeth.de
Sat Jun 2 06:11:45 BST 2007

Hash: SHA1

Frederik Ramm wrote:
> Hi,
>> Why? I've been tagging the node of the motorway which is the actual
>> point where the motorway_link leaves the motorway as junction_ref/name.
> Hm, a typical motorway junction (at least *my* typical motorway
> junctions) have a total of four motorway_link ways connecting onto (or
> off of) the motorway, so there will be four such "actual points".

Exactly. I don't see anything wrong with that. It is needed for a
routing software in order to say, "leave the motorway at junction no.7".
 It's a different question how that should be sensibly rendered on a
map. But that's a task for smart render engines to think about :-).

> What we really need is a way to say "this whole thingie here consisting
> of a handful of motorway_link ways is called 'exit 37'". We don't have
> that now, so any way we do it will be a workaround.

So what is wrong with using multiple nodes and then a renderer could
take all motorway nodes with the "ref=E41;junction_ref=7" and render a
single symbol for them.

> There was tag proposal for named junctions (which I voted against but I
> think I was in the minority) that suggested just putting a lone node
> next to a junction describing what the junction is. If people are now
> using that for normal junctions, then I see no reason why it should not
> be used to name motorway exits.

That's what I was following. The proposal might not be perfect, but it's
better than nothing IMHO.

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