[OSM-talk] colour fills in osmarender

[TM]

Richard Fairhurst wrote:
> Tom wrote:
>>> How would a roundabout be defined?
>>
>> I would have thought that depends on whether the roundabout has a name
>> or not, and precisely how the streets cross it.  Mostly, I would have
>> thought that the loop itself would be a way, unless there is a clear
>> cut case where one road obviously runs continuously over a roundabout,
>> in which case the way-ness of that road should take priority and the
>> roundabout should fill in the gaps with as many ways as are needed.
>
> Yes, agreed. So roundabouts could be:
>
> - defined as individual ways
> - multiple 'ref' tags, one for each road that meets at the roundabout
> (e.g. ref=A361,ref=A44,ref=A3400 - this avoids the need to say "turn
> onto the A361" then "turn back onto the A44", because you simply
> prefer the ref you're already on)
> - junction=roundabout
> - oneway=clockwise|anticlockwise
But this would require the roads involved to actually have ref tags.What
about regular streets (which just have names)? Could a road (way) be
made up of several parts (segments) connected by roundabouts? I've
already suggested that the routing software could treat the roundabouts
as single nodes connecting the parts of a way. Would this require any
additional tags (way or segment identifiers) to be added to the
roundabout ways? Or should the relevant segments of the roundabout way
be added to the road way?
>> This will vary from roundabout to roundabout, someone might care to
>> catalogue the potential configurations and find examples of each, but
>> that someone probably isn't me (on email... I'd be happy to sketch it
>> on a beer mat, such are my inclinations).
So, I guess we're all waiting for Carden to go to the pub, then. :-)

    /   TM