[josm-dev] Unclosed ways

[Dirk Stöcker]

On Sat, 12 Jul 2008, Mark Williams wrote:

> Quite a few roundabouts aren't closed.
>
> Reason being, if it goes over one road then under another, you need
> different way sections to get layering & bridge correct.
>
> An example:
> http://www.openstreetmap.org/?lat=51.49664&lon=0.27121&zoom=16&layers=0B0FFF
>
> I don't think they need checking, I just don't like that assumption!

Well, for sure the checks will produce false positives. That is always a 
balance between false positives and false negatives (i.e. not reported 
problems).

The check already helped me to find a non-closed roundabout and lots of 
natural/build/landuse problems, so I consider it useful. Also different 
types are reported with different texts, so ignoring certain types is 
easy. Test it and report problems, when they are really disturbing. But 
keep in mind, that avoiding false positives always means an increase of 
false negatives.

Ciao
-- 
http://www.dstoecker.eu/ (PGP key available)