Phil, there's a difference between routing calculation (which neither
knows nor cares about road names, numbers, signposts etc) and how the
result of the calculation is presented to the user. Then you need to
relate the nodes/edges in the routing graph back to the real world. The
value in this tag (as well as name, destination etc) is that the
navigation software can give instructions based on recognisable
landmarks instead of referring to way IDs. This distinguishes between
pure "routing" and "useful navigation".
Colin
On 18/11/2012 21:12, Philip Barnes wrote:
On Sun, 2012-11-18 at 20:20 +0100, malenki wrote:
What is the use of tagging some examples where one road connects to
when there is a system-inherent focus on finding such connections
automagically (this one is called "Routing")?
I'd like to have examples, please
I found this one by accident when I was looking at motorway junctions
after reading this thread.
http://www.openstreetmap.org/?lat=52.65853&lon=-2.29423&zoom=15
Eastbound Wolverhampton (W) A41
Westbound Whitchurch A41;Weston
They are just copied from the signposts. I see no value in this tag,
after all as you say its called routing.
Phil
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