[OSM-talk-ie] Getting junctions right

[Andrew McCarthy]

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On Wed, Apr 30, 2008 at 11:20:31PM +0100, Dermot McNally wrote:
> Semicolon separation is evil - it just makes it harder for anyone to
> do something useful with what they will assume to be the single value.
> I did say that this area was the basis for a debate, but it's worth
> pushing down on it a bit. I don't tag roundabouts with refs partly
> because there's no single correct answer but mostly because I can't
> think of any useful purpose for the data. So why bother?

Why not bother? I think it's useful to represent in the data, where
appropriate, that a particular route is continuous. If somebody wants to
know all the roads that intersect with a particular route, it's more
easily done if the roundabouts are tagged than if not. Certainly if it's
classified it as a particular type, I'd see it as appropriate to tag the
matching ref where it's unambiguous.

> Mapnik does display the ref on roundabouts. I don't know if it always
> did, maybe it's a recent problem. In fact, there's even a chance that
> the cases I saw hadn't been properly tagged junction=roundabout.
> Hmmmm...

I've taken a look at some roads, and it seems Mapnik displays the ref on
junction=roundabout *sometimes*, but I don't know when or not. This
shouldn't be too difficult to fix. On the other hand, while cleaning up
the Limerick road numbers, I found plenty of roundabouts missing the
junction tag, too.

Cheers,

Andrew
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