[Talk-us] Use of ref-tag on state highways

[Alan Mintz]

At 2011-08-20 12:34, Nathan Edgars II wrote:
>On 8/20/2011 3:29 PM, Val Kartchner wrote:
>>Because some states officially designate the road as "SR-26", for
>>instance.

I'd say most states do. That doesn't mean, though, we have to copy it. The 
SR is assumed.


>Not to mention states like Texas, which have, for example:
>State Highway (SH) 121
>Loop 12
>Spur 408
>Beltway 8
>Farm to Market Road (FM) 1960
>Park Road (PR) 27
>and probably a few more types.

It seems like each state has a State Route / State Highway class of road, 
and a ton of existing tagging with the aforementioned:

network=US:ST
ref=#

or

ref="ST #"

For FM 1960, I'd use:

network=US:TX
ref="FM 1960"

or

ref="TX FM 1960"


These should require no extra work in parsing - the additional class just 
becomes part of the route # for display. If a particular renderer has the 
right shields for these classes in each state, it can parse out the route 
class. Standard abbreviations for the route classes should be listed in the 
wiki page for the particular state highway tagging.

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