[josm-dev] [OSM-talk-nl] Unclosed ways

[Jo]

Maarten Deen schreef:
> On Tue, Jul 15, 2008 at 12:01:10PM +0200, Dirk St?cker wrote:
>   
>> On Thu, 10 Jul 2008, Frederik Ramm wrote:
>>
>>     
>>> 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.
>>>       
>> Results are (europe):
>>
>>   closed   unclosed
>>    36769 :   16527 : junction=roundabout
>>
>> --> Here probably the check needs to be disabled. User input required for 
>> decision.
>>     
>
> I have noticed that in general the roundabouts that where imported with
> the AND data for the Netherlands are not closed. They normally are laid
> out as seperate ways between each connecting road (so a roundabout with
> 4 connecting roads consists of 4 unclosed ways). These ways all have
> different AND reference numbers.
> I have been connecting a few of them, I'm cc'ing this mail to the OSM-NL
> list to get more comments, most imporantly if this AND reference number
> is still of use.
>   
I wouldn't do that. I find that I'm breaking up roundabouts a lot in 
order to include parts of them in relations for bicycles and buses. For 
buses the parts will have different roles (backward, forward) in a route 
relation. For bicycle routes, often it's only a part of them that is 
part of the relation.

Polyglot