[talk-au] Road numbers in Garmin

James Andrewartha trs80 at tartarus.uwa.edu.au
Thu Oct 23 14:04:15 BST 2008

On Tue, 2008-10-21 at 20:53 +1100, Elizabeth Dodd wrote:
> On Tue, 21 Oct 2008, Ben Kelley wrote:
> > On Tue, Oct 21, 2008 at 6:00 PM, Liz <edodd at billiau.net> wrote:
> > > NH20 particularly bothers me.
> > > Nowhere on the Sturt is there a current sign which says NH20.
> > > It's 20 or A20 according to the state boundaries.
> > >
> > > I'm sure others can point out great inconsistencies with other highways.
> > > Can we decide what labels to put on the roads?
> >
> > NH is national highway. See
> > http://wiki.openstreetmap.org/index.php/Australian_Tagging_Guidelines#Route
> >_Numbers
> >
> > In my experience these guidelines are only partly followed.
> >
> > I suspect showing them on the Garmin maps is a function of the software
> > used to generate the maps. None of the OSM-based maps I have seen have
> > them. I think it would be a really useful addition though.
> Sure NH is National Highway, but this is not consistent with the current 
> signs, and the labelling itself is randomised.
> A NSW current sign says 20, in yellow inside a yellow bordered shield on a 
> green background
> A Vic sign has A20 and I can't check further as I seem not to have 
> photographed one this month
> A SA sign has A20 as above with a small National in the shield
> Nothing says NHxx on the Sturt Highway; but some mappers put NHxx down.
> Can they justify this terminology on the basis of recent signage?

NHxx isn't supposed to be read by humans - the renderers should read
that and realise they need to draw xx in yellow on a yellow bordered
shield with a green background.

James Andrewartha

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