[Talk-GB] OS OpenMap Local

[SK53]

At least in places where I'm familiar: in towns yellow is a reasonable
proxy for tertiary in OSM, but in the countryside it can represent a good
wide 6-7.5 m road with a painted centre line or a road of 4 m or less with
passing places. So AFAIK it neither represents road class nore road width.
This area
<http://sk53-osm.blogspot.com/2014/10/plantations-woods-forests-or-something.html>
shows some of the issues when compared with OSM (Landyke Lane is very
obviously highway=unclassified on the ground, has little through traffic,
and no vehicles over 7.5 tonnes. There are plenty of other examples a
little further N in the Vale of Belvoir.

I usually regard roads with a grey fill & black casing.as good proxies for
hihgway=tertiary.

Blue, green, magenta and brown represent what one would expect (motorwa,
trunk, primary & secondary in OSM terms).

In addition to the  legend, there is a lot of technical gumph
<https://www.ordnancesurvey.co.uk/business-government/tools-support/vectormap-local-support>
about Cartographic stylesheets for the OS Local Vector data, and a quick
glance at those suggests the tiled view is one of those styles. I think the
key thing is that there are two types of unclassified roads - LocalRoad and
MinorRoad - without any more formal detail. The former get a white fill,
the latter yellow. It's just possible that these relate to MasterMap data
types.

Jerry

On Sat, 10 Dec 2022 at 13:04, Dave F via Talk-GB <talk-gb at openstreetmap.org>
wrote:

> Hi
>
> For OS OpenMap Local do road colours represent their class or width?
>
> Has anyone seen a key/ symbols diagram for it?
>
> DaveF
>
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