[Talk-us] Consensus on "SR" for state route versus state abbreviation?
techlady at techlady.com
Thu Sep 13 16:51:58 BST 2012
I agree with much of what you said.
However, I'm not sure why the size of a
state should make a difference in what
abbreviation is used. Large or small, shouldn't
the state abbreviation be consistent?
Also, in the "B" section, where you
suggest US 1 plus US 9 could be abbreviated as US
1-9, I think that could be misleading. It is
common to use a hyphen between numbers, such as
1-9, to signify 1 through 9. That's not what you meant.
And the use of a slash would seem OK if
the prefix always is there, the "I" or whatever
state prefix applies. For example I 70/I 71 or I
95/MA 128. Otherwise, I think, there is potential for confusion.
At any rate, I hope we can come to some
kind of agreement on what to do about overlapping
routes. Now we use semicolons to separate
overlaping routes, but Potlatch 2 always flags
those as incorrect. I "corrected" a bunch of
those before someone told me that it's just a
problem in Potlatch 2. So, it would be great if
there were some clarity on that. Anyone?
And, bring back the hyphen in interstate
highway refs! Here's to I-10, which really does need a hyphen.
So from now on I'll use state
abbreviations and do relations, relations, relations.
At 11:57 PM 9/12/2012, you wrote:
>Concerning ref tags on ways, I don't think
>there's a need to impose nationwide
>"consistency".Â I also don't think it's worth
>even adhering to a strict machine-parseable
>syntax (particularly dealing with overlaps)
>since that kind of information is much better organized in relations.
>That said, here are my "ideal" guidelines for
>formatting ref tags on single state highways:
>1) If there is one clearly-popular abbreviation,
>such as M-xx in Michigan or possibly K-xx in Kansas, use it.
>2) If a state has primary and secondary state
>routes, or numerous classes of state routes like
>Texas, the prefix should indicate the route class.
>3) If a state allows its state routes to have
>the same number as a US or Interstate route in
>that state, a state-specific prefix (postal
>abbreviation or other as described above) should be used.
>4) If a state is large (such that most places
>aren't "near" the borders) a generic prefix like
>SR or SH or STH (depending on preferred local
>terminology) may be used, notwithstanding guideline 3.
>5) If a state's state route markers are generic
>(circle/oval or box) and don't specifically
>identify the state, a generic prefix or no
>prefix may be used, notwithstanding guideline 3.
>6) Consistency within a state, or within broad
>regions of larger states, is probably still of
>value.Â A format should be chosen by consensus
>of mappers familiar with the state or region in question.
>6a) As a mapper familiar with Ohio, I prefer SR
>xx, but would be amenable to OH xx or OH-xx.
>A) I strongly prefer I-xx and not I xx (and
>definitely not Ixx) for Interstates.Â The
>hyphen enhances readability and reduces the
>chance of the I being mistaken for a 1.Â The
>reasons I've heard in support of I xx are: to
>match US and state routes (why does it have
>to?); to match European route designations
>(making apples look like oranges); because "all"
>the Interstates are already tagged as I xx (due
>to a few editors who value consistency a little
>too highly, plus I see that as a circular
>argument); changing it breaks renderers (nearly
>all renderers just pass a way's ref tag directly
>to the output, and those that do try to parse it
>can and should normalize tagging variations as a
>preprocessing step anyway).Â On the other hand,
>I would't argue against the format IH xx in
>Texas because most Texans I've encountered write it that way.
>B) When routes overlap, there is no "right" way
>to format the way's ref tag.Â I don't think any
>active renderers attempt to separate it into
>multiple values; considering this information
>can be stored with much better structure in
>relations, I don't think any programmer wants to
>bother with trying to parse a ref string
>anyway.Â That just leaves humans who will ever
>read it, and we can optimize for that.Â Brevity
>may be more important than technical correctness
>when a human is reading.Â Local understanding
>of routes' relative importance may play a
>role.Â The following "equations" demonstrate
>options to represent overlapping routes in a
>way's ref tag that seem perfectly sensible to me:
>US 1 + US 9 = US 1-9
>I-70 + I-71 = I-70/71
>US 40 + US 62 + OH 16 = US 40-62
>I-74 + I-465 + (?) = I-465
>I-95 + MA 128 = I-95/128
>US 68 + OH 15 = OH 15
>These little white lies are close enough to
>match the line on the map to the road on the
>planet.Â (Every good map has to lie in some way
>to convey information effectively.)Â If someone
>really wants to know which routes follow a
>particular way, they should examine the
>relation(s) that contain it.Â If a mapper
>really wants to make sure the correct, official
>truth is represented in the database, they
>should make sure all relevant route relations
>exist and are correct.Â Trying to squeeze all
>that information into a single string with a
>rigid syntax is optimizing for a use case that essentially doesn't exist.Â
>On Sep 12, 2012 8:59 PM, "Charlotte Wolter"
><<mailto:techlady at techlady.com>techlady at techlady.com> wrote:
>Â Â Â Â Â Â Â Â Was there ever consensus on
>whether to use "SR" (or some variation on that)
>for state highways versus an abbreviation of the
>state name ("CA" or "NY"). I remember that there
>was discussion, but I don't remember if there was consensus.
>Â Â Â Â Â Â Â Â Thanks.
>927 18th Street Suite A
>Santa Monica, California
><mailto:techlady at techlady.com>techlady at techlady.com
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techlady at techlady.com
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particularly any that would affect the first three freedoms.
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