[OSM-talk] Long Ways and API 0.6

Shaun McDonald shaun at shaunmcdonald.me.uk
Sun Feb 8 22:06:04 GMT 2009


On 8 Feb 2009, at 20:08, MP wrote:

>> Routes can happily be split -- the primary point of relations here is
>> to allow more than one route following the same way. It's not like
>> we're trying to build categories or similar -- we don't need to
>> because we can always match tags.
>
> Not always - there can be more routes on one road  for example one
> international route plus perhaps a bicycle route, marked trail or
> route of some bus line. There is for example international bicycle
> route from Prague to Vienna (about 420km), most of it is on local
> routes of even some forest trails, often switching roads and therefore
> having lot of relation members. Many parts of it will be shared with
> another bicycle routes so you can't just forget relation and "match
> tags".
>
> 1000 relation members will be enough for most uses but what about the
> few that are larger?
>

This is a great example of where you can have multiple relations, each  
of which have the same tags, with the possibility of having a relation  
to link all these relations together. I know RichardF isn't going to  
agree.

If the editors had a way to search for similar relations, then it  
would make it easier. Data users need to do the same, as is currently  
done for road names and refs in the rendering.

Shaun





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