[OSM-talk] specific Relations

[David Earl]

See ... http://wiki.openstreetmap.org/index.php/Relations

I have started a set of pages to propose and describe adopted specific 
Relations, now we have them. This is linked off Proposed_features and 
Map_features. (Thank you to Frederick for the starting page).

I am sure you'll all tear these to shreds, but it's a starting point.

These all have "type=..." for the Relations. This is perhaps not 
necessary. e.g. "type=route" and "route=<kind-of-route>" is redundant 
info - the latter is all that is required - but it follows the spirit of 
what Frederick originally proposed.

I have put in initial descriptions for:

* Bridges and Tunnels, to allow for multiple ways crossing the same 
bridge structure, to link to the ways passing under as well as over a 
bridge, to describe the structure's footprint if it is unusual (but not 
to require this if it simply applies to a set of parallel ways), and to 
name it independently of the ways it carries.

* Turn restrictions

* Routes, to include numbered roads, cycle routes and bus routes, 
expandable to others.

* Collected Ways for those pesky branching streets, housing estates 
where all the streets have the same name, and contiguous ways that get 
divided up by bridges and so on - so High Street can now have one object 
representing it. (See the pages for discussion of why I put 
commonly-named ways into this category, but commonly-numbered ways into 
the route category).

* Dual carriageways, simply to relate opposite sides of a dual 
carriageway (not the whole road, which is a Collected Way or Route as 
appropriate by my scheme, but just pairs of opposing ways, mainly so 
that the renderer can suppress duplicate labels)

* Junctions, for the parts of a junction, so renderers can label 
junctions and route planners can refer to them by name or reference.

David