[Talk-GB] Rendering problem (Osmarender layer)

[Nicholas Barnes]

From: "Ed Loach" <ed at loach.me.uk>
> While Mapnik shows it correctly, the Osmarender layer is having
> problems rendering the roundabout here:

Hi Ed!

I had great fun with the roundabouts around here which were all laid out 
pretty much the same. I couldn't find any documentation which showed how 
to do it properly either...

Anyway, I can see now that your problem's sorted (well, JOSM says it is, 
anyway), but leading on from this, I have a question for everybody....

I found somewhere a reference which said that roundabouts should have 
the same road type as the most major road at the junction and not as the 
other feeder roads.

Unfortunately, I can't seem to find this any more, so I am now wondering 
whether that was just a figment of my imagination!

Anyway, In the example Ed gave, I would therefore have set the 
roundabout to be highway=trunk (and not highway=primary as it is at the 
moment) and I would have set the roundabout to the West of it likewise. 
But thinking about it.....

If the main road is a highway=motorway, then the roundabout shouldn't be 
highway=motorway, because (in the majority of cases), it isn't a 
motorway. Perhaps, therefore, the roundabout should be 
highway=motorway_link. Or should it be highway=X (where X is the type of 
the most major road directly connecting to it (i.e. not with a _link).

Am I being overly pedantic, or is there a /proper/ way of doing this?

Cheers,

Nick.