[josm-dev] Unclosed ways

[Mark Williams]

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Dirk Stöcker wrote:
> On Thu, 10 Jul 2008, Frederik Ramm wrote:
> 
>>> I try to build my unclosed ways tester. Now it seems to run fairly 
>>> good, but I'm not sure I catched all area types. Currently I have:
>> If I were you I'd write a simple script to parse a planet file and
>> dump the tags of every way where the last node equals the first.
>> Straighforward to write, doesn't even require memory (node id
>> equality is sufficient, node position not required), just a few hours
>> of cpu time. That will give you a very good idea of how people tag
>> areas; of yourse you'll have some circular roads, roundabouts etc. as
>> well but it should be obvious to the human being which are meant so
>> be areas.
> 
> Well. Actually roundabouts are correct. I made an "unclosed way" checker 
> and no area checker. And an roundabout should be closed too :-)
> 
> I will see if I find time for that at weekend.
> 
> Ciao

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!

Mark
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