[Tagging] Named junctions

[John Eldredge]

If you have signals facing each of the directions at an intersection, will 
all of the signals at that intersection share the same name, or are they 
named separately, so that an intersection where two roads cross would have 
four different signal names?

-- 
John F. Eldredge -- john at jfeldredge.com
"Darkness cannot drive out darkness; only light can do that. Hate cannot 
drive out hate; only love can do that." -- Martin Luther King, Jr.



On November 13, 2015 5:49:53 AM johnw <johnw at mac.com> wrote:

>> On Nov 13, 2015, at 7:46 PM, tomoya muramoto <muramototomoya at gmail.com> wrote:
>
>> However officially (legally) the name is "place" name. It causes some problems.
>
> I understood it to be the signals were named after the places - not the 
> places themselves.And only *sometimes* named for places.
>
> Places are named with place=*, and it is well documented how to name any 
> location in Japan, including the 小字 / 字 / 丁 / 丁目 places with 
> place=neighbourhood
>
> http://wiki.openstreetmap.org/wiki/Japan_tagging#Places
>
> These are signal names, and often they are named for buildings or other 
> locations, not the actual place=neighbourhood places.
>
> A Signal in my city is named, translated, “ Above Kiryu Train Station” 桐生駅前
>
> https://www.google.co.jp/maps/@36.4115134,139.3328665,18.59z 
> <http://www.mapion.co.jp/m2/42.99001590102444,141.35332833963417,15>
>
> The coffee shop on the corner is  Miyamae-cho 2丁 8-5   =>   桐生駅前 is not 
> part of it’s address - it is just the name of that signal.
>
> They are all just named traffic signals.
>
>
> The examples you give are reasons why they are signal names, and not 
> junction or place names.
>
>> Small problem: No junction
>> http://www.openstreetmap.org/node/1114945003 
>> <http://www.openstreetmap.org/node/1114945003>
> The signals are named for the building complex (just like lights are often 
> named for train stations).
>
> The light is just for the crosswalk.  Naming the signal controlling the 
> crosswalk should not be an issue.
>
> The crosswalk itself (road x crosswalk could be considered a junction too.
>
>
>> Severe problem: Different names
>
>> I don't have any idea to map them correctly.
>
>
> wow! that is interesting! I’ve never seen that before.
>
> it looks like they are signs for the block you are entering. so depending 
> on your direction of travel, you see a different block name.
>
> <=== west6     ooo   west5 ======== west5    ooo   west 4======== west4   
> ooo    west 3 ==>
>
> but it overlaps in in both directions. all the lights in that area are that 
> way.
>
> wow!  All of Sapporo is that way!
>
> Google does it with a single named signal with the lowest and highest values
>
> https://www.google.co.jp/maps/@43.0923,141.3410069,17.55z 
> <https://www.google.co.jp/maps/@43.0923,141.3410069,17.55z>
>
> N26 W6
> N27 W5
>
>
> Yahoo Too
> http://maps.loco.yahoo.co.jp/maps?type=scroll&datum=wgs&mode=map&pointer=off&lat=35.4573089010882&lon=139.619295364418&z=19 
> <http://maps.loco.yahoo.co.jp/maps?type=scroll&datum=wgs&mode=map&pointer=off&lat=35.4573089010882&lon=139.619295364418&z=19>
>
> N26 W6 • N27 W5
>
> Mapion as well
>
> http://www.mapion.co.jp/m2/42.99001590102444,141.35332833963417,15
>
> N27 W5  • N26 W6
>
> For people driving, each signal should have it’s own name - but it looks 
> like the map companies have standardized on this layout for naming the set 
> of signals.
>
> This would be a big problem if we were naming junctions, but we are naming 
> signals, so we can give each of the signals a name -
>
> but it is very difficult to get a single icon to render (one set of 
> signals) but have all 4 names shown. I suppose this is why everyone chose 
> the solution they did.
>
> Perhaps we can have the signal members in a group get their own name for 
> routing purposes, but that might be overkill. We since this is such an odd 
> thing, baybe we should follow the data conventions of the other maps and 
> use named pairs for each signal name.
>
> I will now go and look at some other large cities to see if they have this 
> weird grid issue as well. I have never seen this before now.
>
>
> Javbw
>
>
>
>
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