[Talk-us] County road network relations

[Alan Mintz]

At 2011-04-10 16:28, Nathan Edgars II wrote:
>On 4/10/2011 7:25 PM, Alan Mintz wrote:
>>At 2011-04-10 14:00, Kristian M Zoerhoff wrote:
>>>What's the consensus for county roads in the US?
>>
>>I don't know what the consensus is.
>>
>>County roads in California are of the form [A-Z][0-9][0-9]. I tag Orange
>>County route S18 as:
>>
>>network="US:CA:Orange"
>>+ ref="CR S18"
>
>How does this work with routes that cross county lines? California has a 
>statewide numbering system, with the letter roughly representing the part 
>of the state.

Yup - that is problematic. I think, when I marked Orange County S18 last 
year, I didn't see any other county road tagging to go by. 
http://www.cahighways.org/county.html shows that there are some occurrences 
of this. I apparently expected to break them at the county lines, I guess, 
so as to agree with signage. That is, Orange County S99 would be a 
different route than San Diego S99. network="US:CA:Orange;US:CA:San Diego" 
on the relation seems workable.

  It's almost like they defined super-groups of counties identified by 
those letters. I'll have to crunch that table to see if that's the case so 
we could have network=US:CA:S + ref="CR S18". Maybe add an is_in:county tag 
to the individual segments to avoid losing that important info.

I realize this is kind of scattered. On my way out the door.


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