[Talk-ca] ON prefix on Ontario highways

[Jonathan Crowe]

Prefixes aren't always necessary for rendering labels.

RR and CR labels are good in an Ontario context (I'd been putting a few in
manually in the Ottawa area before this user got to work -- I assume it's
automated?), because road numbers and highway numbers regularly overlap and
since not every Regional Route or County Route is a secondary road (see RR
174 east of Ottawa, a motorway, to say nothing of urban boulevards and
expressways that probably warrant being tagged as primary or even trunk
routes, despite not being provincial or NTS highways). But it's safe to say
that everything else in Ontario can be rendered as a King's Highway, if the
number is less than 144 or in the 400s. (Secondary routes have higher
numbers in the 500s and 600s.)

In Quebec, any route number less than 100 or more than 400 is an autoroute;
everything else gets the standard route shield. In Manitoba, provincial
roads are numbered 200 and up; anything 199 or lower is a trunk highway.
Similar rules apply in Alberta, Saskatchewan, New Brunswick and Nova
Scotia: the number indicates the class of route and related marker.

It's really only in Ontario that you need to specify what kind of route
marker should be applied, rather than inferring it from the number -- oh
yes, and in Winnipeg, with its numbered metro route system that overlaps
with provincial numbers.

B.C. has no secondary routes, though some highways (1, 3, 5, 16, 113) get
specialized route markers.


On Sat, Feb 28, 2015 at 11:10 AM, Duncan Hill <duncan at soncan.ca> wrote:

> It might make sense to have that info included. Perhaps it could use a
> separate tag and then renderers can choose how to label it.
>
> On Sat, Feb 28, 2015 at 10:56 AM, Andrew MacKinnon <andrewpmk at gmail.com>
> wrote:
>
>> Also this user has been adding "A" to Quebec autoroutes, "R" to Quebec
>> provincial highways, "CR" to Ontario county roads, etc.
>>
>> On Sat, Feb 28, 2015 at 10:46 AM, Andrew MacKinnon <andrewpmk at gmail.com>
>> wrote:
>> > I've noticed that User:Zachary77F has been adding the prefix "ON" to a
>> > lot of provincial highways in Ontario. I am not sure whether this
>> > makes sense (looks kind of weird on the default Mapnik renderer)
>> > though this convention seems to be used in the US for state highways.
>> > Should I keep provincial highways tagged this way or should they be
>> > changed back to the way they were?
>>
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-- 
Jonathan Crowe
http://www.jonathancrowe.net
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