[Talk-us] [OSM-talk] Finding untagged dead-ends

[James Umbanhowar]

On Wednesday, February 15, 2012 12:39:52 PM John Sturdy wrote:
> On Wed, Feb 15, 2012 at 5:27 PM, Martijn van Exel <m at rtijn.org> wrote:
> > I don't really see the value of a generic noexit=yes tag - it can and
> > should be inferred from the network. But finding dead ends can be
> > valuable for tagging the countless turning circles / cul-de-sacs that
> > exist in post-war subdivisions in the US - like John mentioned.
> 
> After a bit more thought, I'm not even sure of the definition of a
> dead end --- is a road that leads into a closed tree (or other graph)
> of roads and dead end?  It does lead to other roads, but you can't get
> out onto the wider road network without coming back along the same one
> again.  For example, is
> http://www.openstreetmap.org/browse/way/4678941 a dead end?
> 
> __John
> 
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Those roads that lead into a closed tree are frequently signed as "No Outlet"