[Talk-ca] Proposed changes to road classification and related stuff

[Kevin Farrugia]

The relations should define the shield (network=*), not a prefix on the
ref.  I think most of Ontario's highways and all of the province's freeways
have the network tags present.

Former provincial highways in Ontario shouldn't be an issue because they've
been tagged with their post-download numbers and relevant network=* value.
The mass downloading of highways happened 6 years before OSM started, so
they've always been under this classification.  Also highways doesn't
necessarily mean freeways (400-Series) - some of these highways were 2 lane
country roads at the time that could now be maintained by the growing
suburban population and were no longer as relevant with the expansion of
the 400-Series system.

A Canadian-specific specification would be nice to have defined.  We've
just sort of gone with the flow and kind of adjusted the American system
and province-to-province differences always confuses discussions.

-Kevin

On Tue, 1 Feb 2022 at 23:59, Jherome Miguel <jheromemiguel at gmail.com> wrote:

> On Magic Earth, the case is the shield rendered seem to depend on the
> underlying classification (other renderers too?). So in the case of some
> primaries in the GTA that are former provincial highways, not adding a
> suffix such as CR or RR to distinguish it from provincial highways (this
> being the likes of the 401, the 407 and the other 400-series highways)
> would result in a provincial highway shield being rendered instead of a
> regional or county road shield. Maybe also a consideration for provincial
> highways that use TCH sign except in Ontario and Quebec.
>
> On Tue, Feb 1, 2022 at 9:40 PM Brian M. Sperlongano <zelonewolf at gmail.com>
> wrote:
>
>> On Tue, Feb 1, 2022 at 11:08 PM Jarek Piórkowski <jarek at piorkowski.ca>
>> wrote:
>>
>>> Many renderers use the underlying classification to determine what
>>> shield will be used
>>
>>
>> Down here south of the border, we recently launched the
>> openstreetmap-americana project, and we're the first open source map that
>> has highway shields with full concurrency support on vector tiles. We do
>> not use the highway classification to determine which shield is used.  We
>> derive this information entirely from the list of road route relations that
>> a way is a member of, as well as the network and ref tag on that route
>> relation.  We ignore the ref tag on ways entirely for the purpose of
>> generating shields.
>>
>> (no, we haven't implemented Canada highway shields yet.  Yes, we want to)
>>
>> [1] https://zelonewolf.github.io/openstreetmap-americana
>>
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