[talk-au] Custom highway shields

[John Smith]

This has been a niggling problem for a number of people including
myself for some time now, while it was possible to due this on the fly
that method doesn't really scale so I've had to come up with an
alternative plan of action and I've been discussing this with a couple
others on and off for the last week or so.

However I think we've managed to come up with a suitable technical
solution, which was promptly shouted down, even before an
implementation even existed, because some people only want the oval
highway shields.

I'll try to get some time today to come up with some code, but it's
the silly season...

In the mean time, I've thrown up a wiki page that we plan to use as
the basis of a lookup table, once the country of a way is known we can
look at other tags/polygons as needed to figure out the shield needed.

http://wiki.openstreetmap.org/wiki/Custom_Highway_Shields

I hope this lookup table should be extensive enough to not only cover
numeric shields, but also pictorial tourism shields.