[talk-au] Mapping "Tee Place" or "Y Court"

[Darrin Smith]

On Sat, 14 Jun 2008 13:40:33 +1000
"Nick Hocking" <nick.hocking at gmail.com> wrote:

> While cleaning a whole lot of duplicate ways in the ACT OSM data, I
> noticed an unusual merthod of mapping a small section of road that is
> in the shape of the letter "T".
> 
> There seem to be 3 ways of tagging this road.
> 
> 1) Tag the upright as a way. Then Tag the horizontal as another way,
> with the same name.
> 
> 2) Do a way like an upsidedown L then another way for the left hand
> half of the horizontal
> 
> or
> 
> 3)  Go up the upright, then left to the end, then back along the same
> track to the junction, then over to the right hand end.
> 
> This results in having one continuous way but does involve having two
> bits of the way on top of each other and going in opposite directions.
> This might cause a routing program a bit of a dilemma.
> 
> The same problem occurs with a Y shaped road where the top bits can
> be fairly small.
> What is the best method of tagging these and if I use methods 1 or 2
> (as I have been doing) should I also add a street relation to tie up
> the two ways into one entity (also with the same name).

I don't know what's the 'best' but I've been using method 1 for T roads
and 2 for Y roads and a relationship to tie them together. But I'm only
one person...

I definitely think #3 is not the best option however.


-- 

=b