[Talk-GB] Validation tools

[Mark Williams]

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Ed Loach wrote:
> Are there any validation tools I can use to check for any disconnected nodes/ways? I'll try and explain.
> 
> The other day I was fine tuning a road I drive frequently which has appeared now on many traces - I was moving it to the middle of the trace noise assuming that would be more accurate than leaving it where the first trace placed it. I discovered when I got to the end of it that the node was on the way where I'd have to give way to turn left or right, but not connected to it. I can't think how that happened, although it would have been one of the first roads I added after getting the GPS device, so perhaps I was still new at using JOSM and did something wrong. 
> 
> I realise that routing applications would have seen this way as a dead end (probably). Short of me checking every node/way junction in Clacton (and surrounding area), is there any simple way to see if I've got the same issue anywhere else?
> 
> Thanks
> 
> Ed
> 

It's a common Potlatch thing - JOSM's Validator will show ones where the
straight way crosses the incoming way, but not where the incoming one
falls short - if that's at all clear! Usually JOSM snaps to lines so it
normally does connect, Potlatch doesn't (or didn't?) so I have found a
good few of these.

Try a routing app - there is a tool, in gosmore IIRC, called osmunda
which peruses your .gpx files & highlights impossible turns, this can
pick those out quite well.

Mark
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