Dudley Ibbett wrote:
In Upper Hulme (Old Buxton Road and Roach Road) and on roads above
(Back of the Rocks) and below (Blackshaw Lane) there seem to be "odd"
changes between Unclassified and Tertiary Road tags.
http://www.openstreetmap.org/#map=15/53.1444/-1.9821
I've no experience with regard to tagging highways so I was wondering
what information there is available to check whether this is correct
of whether it is a judgement call? Roach Road is mostly single track
and has a gate on it.
Hi Dudley,
There are a few things going on here I suspect:
The first thing that I notice is that the way IDs for some of the roads
are very early, which in this location probably means that they were
originally added from NPE data by someone without local knowledge, and
it wouldn't have been possible to derive road type from there. That
original contributor may well have long gone from the history, due to
splits and merges etc. The second thing that might be happening is that
someone's surveyed part of a road and changed that part from tertiary to
unclassified, but left a bit after a way split still tertiary. There
were lots of "tertiary unclassified" to the east in Derbyshire; there
are fewer now due to the mapping attention that Derbyshire's had but are
still some left in Staffordshire.
The third effect that you might be seeing (and here it's the odd cases
used on road names that's the giveaway) is that some contributions are
from an enthusiastic contributor from south of there who sometimes needs
a bit of tidying up after (well meaning, but not always in the right
place or called the right thing).
I tend to follow the UK bits of
https://wiki.openstreetmap.org/wiki/Tag:highway%3Dtertiary
and
https://wiki.openstreetmap.org/wiki/United_Kingdom_Tagging_Guidelines#UK_roads
for deciding if something's tertiary. This does result in some oddities
- here <http://www.openstreetmap.org/#map=15/52.9492/-1.8553> I made the
road past the JCB plant tertiary but unclassified afterwards.
Basically, if it's wrong, change it! According to ITO world you're the
most prolific contributor to that area by a factor of 2 so I'd say that
you're the expert.
Cheers,
Andy
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