[OSM-talk] Way segment count

[Simon Hewison]

Dean Earley wrote:
>> This is only evident in JOSM after clearing and re downloading a map.
> 
> Further to this, the remaining segments are completely out of order.
> My understanding was that the order DOES matter, especially for routing?
> 
Order matters a bit more when you're trying to fit text labels along a 
way, in which case, bits text of label your might wrong place appear in.

Routing algorithms shouldn't really refer to ways except for gathering 
values about segments, and when it comes to actually describing the 
route to the user, else they'd behave like Google's route planner, which 
appears to attempt to find a 'fast' road, and stay on the same road at 
all costs, even if it means going 30% further/slower.

Routing algorithms should be more concerned with finding junctions and 
distances/times/restrictions between junctions, and traversing the graph 
to find a suitable route, rather than following pre-determined routes.

-- 
Simon Hewison