[Talk-us] User going around adding '-' to ref tags in Michigan

Minh Nguyen minh at nguyen.cincinnati.oh.us
Sat Sep 27 05:06:45 UTC 2014

On 2014-09-26 12:22, Paul Johnson wrote:
> Yeah, the consensus on the lists was to always use the postal
> abbreviation for the state.  Kansas and Colorado also tend to refer on
> the signs to "C 149" or "K 66" but are generally tagged CO 149 or KS 66...

As I've noted in the past, the consensus among mappers in certain states 
has been to use something other than the postal abbreviation. Courtesy 
of overpass turbo, here are some states that haven't quite adopted the 
postal abbreviations:

- In Ohio, "SR" is on over 13,500 ways (99%), versus about 200 with 
"OH", all by one mapper who was mainly concerned with fitting MapQuest's 
regular expression. (They were quite enthusiastic about the shield 
renderer when I brought it to their attention. You don't know how happy 
it makes a roadfan to see township route shields on a map! :-)
- In Michigan, over 5,300 ways (97%) are tagged with either "M" or "M-", 
versus 171 with "MI". Michigan route shields have an "M" at the top.
- Tennessee has over 5,100 ways (73%) tagged with "SR" versus almost 
1,900 with "TN". I haven't checked, but this might be the way mappers 
are distinguishing between the primary and secondary route networks. 
(Only the primary routes' shields say "Tennessee" at the top.)
- In Indiana, over 2,000 ways (35%) are tagged with "SR", while "IN" is 
on 3,700 or so.
- Colorado has over 650 ways (17%) tagged with "SH", over 3,200 with 
"CO", and none with "C" or "C-". That doesn't count the 28 highways 
Colorado built for counties in Minnesota, Arizona, Ohio, and Maryland 
("CO"). ;-)
- In Texas, roughly 1,400 ways (13%) are tagged with "SH", while nearly 
9,500 ways say "TX". State Highway shields say "Texas", but variable 
message boards and blade signs along all the frontage roads say "SH". 
I'm assuming no one erroneously changed other designations like "Loop" 
and "FM" into "TX".

Yes, these states make it more difficult to choose shields by matching a 
regular expression on way refs, but that approach is overly simplistic 
anyways. [1]


minh at nguyen.cincinnati.oh.us

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