[Routing] Errors in map data that affect correct routing - and what to do about it...

[Jannis Achstetter]

GS schrieb:
> Hi Cathy,
> 
> once I've been to Edinburgh, came by ferry and car to explore the northern coast of Scotland. That was a nice time. Now I have a wife, a house and a child leaving not much possibility for such travel. But luckily I can do other things :-)
> 
> I think I can help you a bit. 1st I think that these double nodes are errors. Done by whatever version of whatever program. I think you can not prevent all errors. I think the API should reject those ways. However, now they are there. JOSM now has a good validator plugin. But it's a plugin, has to be installed deliberately and has not been there all the time.
> 
> I will write a check program for these which we can use to identify those ways. Not a big deal. Should be done today or tomorrow. But then they will only be identified, not corrected.

You don't need to write one, it exists:
http://tools.geofabrik.de/osmi/?view=geometry&lon=-3.25537&lat=56.00293&zoom=9

(but Edinburgh looks quite well there)

Jannis