[Talk-us] State ref tags on ways: Use of unique ISO/ANSI/USPS 2-letter state codes in RELATIONS as well as WAYS?

[Toby Murray]

On Tue, Mar 11, 2014 at 6:48 PM, Richard Welty <rwelty at averillpark.net>wrote:

> On 3/11/14 7:04 PM, Peter Davies wrote:
> > I thought I would make my proposal stand out a bit more by adding words
> to
> > the title.  :-O
> >
> > There are some weird things, like Nebraska's state law that requires NDOR
> > to have a state road link to every community of a 100 people or more.
> I've
> > changed some "Link 80F" ref tags to "NE 80F Link" and "Spur nnX" tags to
> > "NE nnX Spur" without having time to do the whole state.
> >
> > AZ has its "Loop 101" and "Loop 202" freeways for which I would advocate
> > refs "AZ Loop 101" and "AZ Loop 202".
> >
> > Texas also has many weird qualifiers on minor state routes but as I've
> > never contracted there for 511 I'm not totally familiar with them.
> >
> >
> On relations, i think we have a clear, agreed upon standard that
> the network tag indicates the grouping of highways to which a particular
> route belongs, and the ref tag indicates the identifier within that group.
>
> so you end up with something like
>
> network=US:AZ:Loop
> ref=101
>
> although some might prefer
>
> network=US:AZ
> ref=Loop 101
>
> either one contains enough information in an easily parsed format to allow
> data consumers to accomplish what they need to do. i lean towards the
> former
> tagging approach


I went and verified some things about bannered routes. It looks like the
current shield rendering looks for network=X:Y:Modifier. So for example the
US 50 truck route in Cincinnati is network=US:US:Truck and ref=50. The
relation and rendering can be seen at the following two URLs:
http://www.openstreetmap.org/relation/1142913
http://openstreetmap.us/~toby/shields.html#14/39.1162/-84.4678

Looking around it looks like the other convention that has some decent use
in the database (but is not currently supported by any renderings) is to
add a modifier=Truck/Business/Spur/etc tag. You can see current usage in
taginfo:
http://taginfo.openstreetmap.org/keys/modifier#values

Soo... yay for multiple standards?

Toby
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