[Talk-GB] Road route relations in the UK

[Frederik Ramm]

Hi,

SomeoneElse wrote:
> 1) Why the need for 4 A1 route relations?

I'll leave that to others, but

> 2) Why the need for even one?  After all, the "ref" tag on all the 
> component parts of the A1 should identify them without the need for a 
> relation.

True. A relation should only be needed if a stretch of road is shared by 
several numbered routes (don't know if that happens at all in the UK). 
However, because the availability of services that can quickly respond 
to a query like "give me everything tagged ref=A1 in the UK" is patchy, 
people tend to create relations as easy access handles - once you have 
such a relation, you can simply get /api/0.6/relation/12345/full and you 
have the complete A1 from London to Edinburgh. And possibly back again.

Bye
Frederik

-- 
Frederik Ramm  ##  eMail frederik at remote.org  ##  N49°00'09" E008°23'33"