[OSM-talk] Advanced relationships

[Frederik Ramm]

Hi,

> The current wiki page for "advanced relationships" _does_ propose using
> segments, gives several examples using segments. 

Yes but that's because people still think in segments; all the examples 
are equally valid if you substitute ways for segments. The methods 
discussed do not require segments.

> There is nothing
> currently in the wiki discussion to indicate any disagreement with the
> premise that if "advanced relationships" were implemented as proposed they
> would use segments for turn restrictions and routing.

I'll add that.

> It is (obviously) possible to implement the same relationships with just
> nodes and ways.  After all, a segment is just an ordered pair of two nodes.
> You can't do it with just two objects linked though, that is insufficient.
> A turning restriction becomes a couple of ways and a node (or even three
> ordered nodes).

Exactly.

Bye
Frederik

-- 
Frederik Ramm  ##  eMail frederik at remote.org  ##  N49°00.09' E008°23.33'