[Talk-us] US highway tagging (was Re: highway shields: "get your kicks, where?")

[Richard Weait]

On Tue, Jan 4, 2011 at 4:09 PM, Alex Mauer <hawke at hawkesnest.net> wrote:

> Not sure if you’re looking for commentary on the shield overlay in general,
> but it seems like it has some problems.  Take a look at I-39/US-51 here[1].
>  Only one shield for I-39 until you scroll all the way south to Bloomington,
> IL.
>
> I don’t know if that’s because it’s prioritizing US shields over interstate
> shields or what, but it should show both at equal frequency.  It also seems
> like there are way too many US-51 shields.

When more than one relation is shared on a way, the shield placement
is sensitive to relative way-length, and starting points.  Zoom in a
bit and you get alternating shields.

http://weait.com:8080/map/shield2.html?zoom=9&lat=44.90346&lon=-89.61928&layers=0BTT

The correct way to do this will be to find co-incident relations, and
build a combined shield to place at each shield location, rather then
alternating positions.  This scales better for multiple co-incident
relations.  And it looks great.

> I assume it’s not expected to display state routes, at least not yet.

I've added state routes in several states.  Check your favorite places
in CA, CO, NH, NY, OH, MA, and a few others (so far).  I also added
some shields in Australia the other day.

> I’d give the shields a black outline rather than putting them on a solid
> black box.

I understand that others will make different rendering choices when
they build their styles.  ;-)

I have nothing against the "die-cut" style of US shield, but the ones
I see posted on the roads 'round here have the black rectangular
background.  I think CA still uses the die-cut shield.  Do others?

> Other than that it looks great.

Thank you!