[Tagging] Opinion on meaning of tracktype, smoothness and surface for routing
phil at trigpoint.me.uk
Fri Mar 21 20:49:47 UTC 2014
On Fri, 2014-03-21 at 17:15 -0300, Fernando Trebien wrote:
> Brazil has no official system of classification (there is an
> "administrative" classification, which the Brazilian community found
> useless to determine the way's "importance"), so we've come up with
> this general recommendation (which may not be followed closely, in
> which case the mapper should add a note explaining why):
> Visibility is an interesting criteria, do you take it into account
> when deciding classification? Do you tag it?
We don't tag is specifically, but it is part of the mental
tertiary/unclassified decision process.
As hedges are mapped more, maybe that is an additional factor routers
will be able to use.
> On Fri, Mar 21, 2014 at 4:41 PM, Philip Barnes <phil at trigpoint.me.uk> wrote:
> > On Fri, 2014-03-21 at 13:29 -0500, Paul Johnson wrote:
> >> Does anyplace outside North America subjectively tag highway=* or is
> >> it formally tied to the official classification in most places, such
> >> as it is in the UK?
> > In the UK, tertiary/unclassified/residential is subjective, other roads
> > are tagged according to their official classification.
> > In terms of routing in the UK, smoothness is not so much of an issue.
> > The major factors are width (whether 2 vehicles can pass without slowing
> > down), twistiness and visibility (the two go together, we have a lot of
> > hedges which reduce forward visibility).
> > Phil (trigpoint)
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