[mkgmap-dev] [PATCH v5] - merge nodes to remove evil short arcs

Thu May 28 18:10:35 BST 2009

lot of things are possible im osm. does it mean we should do it?
a way with loops must be broken for routing and this will change the  
topology. doesn't really matter how it's done it's always a  
modification of the topology.  doesn't matter how it's done. now it's  
probably broken which is as good as any other solution.

On 28 May 2009, at 18:10 , Johann Gail wrote:

>
>
> Apollinaris Schoell schrieb:
>> have checked some of the failing ways and they are all bad data  
>> where a way is folded once ore more times and the segments share  
>> the same nodes. one example
>> http://www.openstreetmap.org/browse/way/28554391
>> there is probably nothing mkgmap can do.
>> data is broken and must be fixed. nice to have another tool to  
>> verify osm data!
>>
>>
> I personally wouldn't create such a way, but is it an invalid one?
> Is it written somewhere for osm data that a way is not allowed to  
> intersect itself?
>
> If these are valid ways then mkmap has to handle it properly.
>
> Regards,
> Johann
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