[Talk-us] Another state route shield renderer and tutorial

Paul Johnson baloo at ursamundi.org
Wed Jul 27 18:43:14 UTC 2016

OK, but how does it handle literal edge cases?  Such as WA 433 in Oregon,
OK 20 in Arkansas, or AR 43 in Oklahoma?  Or not-so-edge cases such as
Texas' infamous multitude of state highway networks, or the two state
highway systems in Oklahoma, Kansas and Missouri?

On Wed, Jul 27, 2016 at 2:12 AM, Minh Nguyen <minh at nguyen.cincinnati.oh.us>

> A couple days ago, I posted a diary entry about rendering state-specific
> highway shields using Mapbox tools. It's a topic of special interest to the
> U.S. community, so I figured I'd give the talk-us list a heads-up since not
> everyone reads the diaries regularly:
> <http://www.openstreetmap.org/user/Minh%20Nguyen/diary/39123>
> The diary entry begins with a summary of the arguments for pictographic
> shield rendering and the challenges facing renderers that attempt to
> differentiate between each state's design. I also argued against using
> regular expressions to select state route shields.
> I developed a demonstration vector renderer, called Interstate, that
> differentiates between the Ohio, Kentucky, and Indiana state route shields,
> despite ambiguous `ref=SR 123` tagging in both Ohio and Indiana:
> <http://nguyen.cincinnati.oh.us/minh/osm/interstate/>
> Though Interstate is only a proof of concept design-wise, it runs on
> production servers and mainstream software. The second half of the diary
> entry walks you through the steps to create your own, prettier version of
> Interstate using free Mapbox tools.
> (Full disclosure: I work at Mapbox. But my motivation for posting the
> tutorial is to nudge the community away from relying on regular expressions
> to select shields and towards eventually using route relations for that
> purpose.)
> For now, I continue to point people to <
> http://elrond.aperiodic.net/shields/> when I want to show them what route
> relations are good for, but Interstate is another option when the issue of
> way `ref` formats comes up.
> --
> minh at nguyen.cincinnati.oh.us
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