[Tagging] Tags useful for rendering of roads in poor conditions

Volker Schmidt voschix at gmail.com
Tue Dec 31 17:10:09 UTC 2013

Two notes:
1) I see tracktype used in Italy on highways other than track and have don
so myself. Happens for roads that are classified form their traffic
importance different from track, but which are physically similar to track
and threfore can be classified by tracktype
2) In Germany, Austria, northern Italy, many tracks (agriculture/forestry
roads) are tarmacked and usually tagged tracktype=grade1; surface=asphalt

On 31 December 2013 17:45, Richard Welty <rwelty at averillpark.net> wrote:

>  On 12/31/13 11:10 AM, Fernando Trebien wrote:
>  I've been interested in proposing a change to Carto's style (Mapnik's
> main style) to allow visual identification of unpaved roads for any kind of
> road, much like the Humanitarian style does, which bases this decision on
> values of the surface tag. The Brazilian community has shown interest on
> this many times, since lack of this feature causes unaware users to
> classify roads incorrectly. David Bannon proposes (below) that we use the
> tracktype tag for that instead, but I've never seen it being used for
> anything besides roads with highway=track (therefore, not a very common
> practice it seems). Do you think we should encourage its use in conjunction
> with unclassified, tertiary, secondary and primary highways?
>   i've been known to use tracktype with highways other than tracks,
> generally in
> conjunction with setting surface=(gravel,dirt, etc.) there are rural parts
> of
> the US where such classification seems appropriate to me. i'm not sure if
> it's
> still true, but back in the 70s Vermont had state highways surfaced with
> gravel.
> tracktype works well for this; if it's not common usage now, maybe the
> wiki should be tweaked to suggest such usage.
>  It seems to me that surface=compacted is quite similar in meaning to
> tracktype=grade1 (whereas surface=sand, surface=dirt, and others, could be
> equated with other grades but rarely with grade1, particularly because the
> "compacted" value exists) and so both tags could be used for the same
> rendering purpose. Do you agree?
>   i frequently use
> highway=unclassified
> tracktype=grade1
> surface=gravel
> in cases where the road is well maintained and able to support traffic.
> many, many farm roads in the midwestern US meet this description;
> they don't particularly need to be paved, but they do need to support
> heavy farm equipment moving from field to field.
> richard
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