[OSM-talk] Overlapping & Crossing ways

[Mark Williams]

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Richard Fairhurst wrote:
> Mark Williams wrote:
> 
[snip]
> 
> On a slightly related issue, I'll be interested to see how  
> changesets, and the easier ability to monitor an area, affect this.  
> 0.6b went live on 15th January, 0.8a on 30th March, so these  
> duplicated ways have been around there for a while: I'm slightly  
> surprised that they hadn't been noticed before.
> 

Mmm, me too, but I've been looking to the east more of late, so it took
'til I ran up Validator over an area I knew to be reasonable already to
spot; but actually the whole section of M25, A13, junction & river were
on twice plus, as I said, a couple of triplicates (!)
This part has been done since before I joined OSM, so it's not under
active editing (not by me, anyway!).
Where it had been quite neatly done, it was hard to spot; and the
tripled layer actually used the same nodes, so GOK.... Perhaps when
routing is in actual common use these things will be spotted sooner.

It would be possible to put in quite an exotic set of these, producing
some really amusing navigation directions from that perspective ;) -
I've had my Navteq system suggest the 7th exit from a 4-road roundabout
before, perhaps I now know why?

Anyhow, I'm only speculating as to causes; I have sent a couple of
(hopefully) polite & helpful postings to named individuals, but no
feedback has been forthcoming as yet.

Please don't take it as yet another dig at Potlatch - As I said, I think
it's more of a network issue and would affect any on-line editor.

Mark
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