[Talk-GB] road relations

[Dave F]

On 01/06/2019 12:00, Colin Smale wrote:
> Relations are great to represent real-world relations that cannot be
> inferred (reliably) from the other data in OSM. Often a geometrical
> relation exists, such as a node inside a polygon, but not always.
>
> OSM loves to allow things to be inferred from the data, but there is
> usually a way of entering the attributes/relationships explicitly as
> well, for the cases where the heuristics fall down.
>
> The wiki says about relations: "Relations are used to model logical (and
> usually local) or geographic relationships between objects. They are not
> designed to hold loosely associated but widely spread items. It would be
> inappropriate, for instance, to use a relation to group 'All footpaths
> in East Anglia'.Why don't PT stop_areas fit with this?

As all items have co-ordinates, OSM is geospatially aware; and of course 
any objects with the same value tags are already 'collected together' & 
searchable.

'stop_areas' - Bins are irrelevant to routing from A to B. Do any 
routers use them?

DaveF