[Talk-us] Scrubbing route relations

Michal Migurski mike at stamen.com
Sat Oct 20 07:44:07 BST 2012

I did not know about the Aperiodic site, very cool!

It sounds from the advice there that I should use a different strategy with the network tags, and duplicate the "Loop", "Business" and other modifiers to that tag.


On Oct 19, 2012, at 11:26 PM, Chris Lawrence wrote:

> My only concern with the scrubbing applies to bannered routes (routes
> with the "modifier" tag); we've been going back and forth on the
> proper tagging for seemingly years now, and while I think the proposed
> scrubbing conforms with the original intent under the tagging scheme,
> the generally agreed-upon (by everyone except NE2, at least) tagging
> seems to be as documented at:
> http://elrond.aperiodic.net/shields/supported.html
> "The rendering expects data tagged according to the documentation on
> the wiki and further refined based on discussions on the talk-us
> mailing list. In particular, two things are worth knowing:
> "* The value of the ref tag on the relation must contain just the
> route number, without any network information. The relation for
> Interstate 5 should be tagged with network=US:I, ref=5.
> "* Variant routes (alternate, business, truck, etc.) must be tagged
> with the variant in the network tag, not the ref tag. (The variant
> text should also be in the modifier tag, but this rendering does not
> depend on its presence there.) Thus, US Alternate Route 1 would only
> be rendered if it were tagged network=US:US:Alternate, ref=1."
> Since this site (http://elrond.aperiodic.net/shields/) seems to be the
> only real consumer of route relations at the moment (we're not sure if
> Mapquest Open is or whether it's just running a bunch of ad-hoc data
> fixups to make its shields sensible), I think it makes sense to follow
> the guidance from that site at least as far as deprecating "modifier"
> in favor of making variants part of the network tag.
> However, the CR tagging changes suggested here seem fine to me.
> Chris
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michal migurski- mike at stamen.com

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