[Talk-us] Tagging of county roads

[Apollinaris Schoell]

On 26 May 2010, at 10:11 , Alan Mintz wrote:
>> what does the S mean in the ref?
> 
> It's just a part of the reference numbering. County road references are a letter followed by one or more numbers, and this is how it's signed (see http://en.wikipedia.org/wiki/County_Route_S18_%28California%29 for the example mentioned below).
> 
> 
>>  is it a state route or a county road?
> 
> I'm talking about county roads, not state routes.
> 

In other counties in CA they are J, never seen the S for county roads. good to know

> 
>> I think most use CA for state hw. It's hard to tell if this is correct. Even hw shields are inconsistent. most shields in california use the number only but some shields and official documents use other abbrev like SR. 
>> I think to match the what's on the ground rule we should change CA to SR, but it's very common across US already and only if there is a broad consensus this should be done
> 
> It seems you are talking about state routes here, not county roads.
> 

yes, similar situation tough. quite inconsistent in reality and in osm

> 
>> > Does it make sense to add a network=US:CA:Orange tag (like the relation) 
>> > instead of the is_in:* tags?
>> 
>> this is as wrong as is_in tags, someone invented it to tag for a renderer. network=Orange should be sufficient and correct.
> 
> But there are counties named Orange in other states, which is why I want to include the state somehow - it's as important a part of the complete reference as the county.

not really needed, the state and country polygons with the coordinates define where it is. sure there is some redundant info in osm and it doesn't harm to have more data.
in general the better tag structure and very common approach is to define a namespace like this

network=Orange
network:state=CA (or california to make it human readable)
network:country=US, but this is probably overkill

this is much easier to understand for humans and it is easier to parse by applications. packing all info into a single tag value by some cryptic codes is tagging for a specific application.

> --
> Alan Mintz <Alan_Mintz+OSM at Earthlink.net>
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