[OSM-dev] Ways

Sarah Hoffmann lonvia at denofr.de
Fri Aug 12 08:55:31 BST 2011


Hi,

I recently stumbled upon another strange case that may cause trouble:
a way where two consequetive nodes had different IDs but
exactly the same coordinates.

Sarah

On Thu, Aug 11, 2011 at 07:07:34PM +0200, ant wrote:
> I'm currently writing processing software and a couple of questions
> regarding ways have come up. None of the following examples makes
> practical sense, and I believe (hope) that the editors prevent such
> things from happening. But what about ...
> 
> ... subsequent duplicate references?
> 
> <way>
> 	<nd ref="1"/>
> 	<nd ref="2"/>
> 	<nd ref="2"/>
> 	<nd ref="3"/>
> </way>
> 
> ... closed ways trivial enough not to represent an area?
> 
> <way>
> 	<nd ref="1"/>
> 	<nd ref="2"/>
> 	<nd ref="1"/>
> </way>
> 
> <way>
> 	<nd ref="1"/>
> 	<nd ref="1"/>
> </way>
> 
> 
> The reason why it bothers me is that I feel my program should deal
> with these cases. So the technical part of my question is: How does
> the API handle it? Which of the above should I expect to be found in
> the planet file, which not?
> 
> cheers
> ant
> 
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