[Talk-GB] Naptan Imports

[Peter J Stoner]

In message <5e98b83652.Traveline at mytraveline.info>
          Peter J Stoner <stonerpj at mytraveline.info> wrote:

> In message <4ECD147A.7000501 at raggedred.net>
>           Chris Hill <osm at raggedred.net> wrote:

>> On 22/11/11 22:26, Graham Jones wrote:
>>> Hi,
>>> I just found a node tagged with lots of things to do with naptan.  It
>>> looks like it should be a bus stop, but there is no highway=bus_stop
>>> tag on it. (http://www.openstreetmap.org/browse/node/471495304).
>>>
>>> I just wonder what to do with it - can either add highway=bus_stop
>>> because it was probably supposed to have that on it, or delete
>>> it because it does not seem to be doing anything.  I would just like
>>> to do something with it because it is turning up as a possible brewery
>>> on the BrewMap.....
>>>
>>> Any thoughts?  I don't know how the naptan data was imported to know
>>> if this is a common problem or not?
>>>
>> Natpan imports were imported at the request of local mappers, in the
>> hope that they would be verified - many have not been. The Naptan tags
>> do convey information about the stop that needs checking and sometimes
>> correcting. I checked a lot of stops and forwarded the results of my
>> checking to the local council (councils feed the data into the Naptan
>> database). At first they seemed interested but as the financial belt
>> tightened they seem less so.

> Local authorities should be more interested in your help because of
> the financial pressures.  I will be happy to try and follow up through
> Traveline channels if you have good feedback that is not being taken
> up.

> NaPTAN is now released on data.gov.uk every three months so the feed
> into OSM is rather out of date now.  That will affect some areas more
> than others.


>> The stop has no highway=bus_stop tag because it is a customary stop
>> (naptan:BusStopType = CUS). If you do survey any of these and you find a
>> bus stop sign, add a highway=bus_stop too. If you check the details on a
>> survey you can then remove the naptan:verified = no tag. Check the
>> street names - they can be useful indicators about road names especially
>> in rural roads. The naptan:Bearing = W on that tag looks dodgy, because
>> buses leaving tha stop would be heading north east (ish). I don't think
>> that CUS tag is right in that case either because the naptan:Indicator =
>> opp means there is a sign on the opposite side of the road so it is not
>> really a customary stop, but that could be a Suffolk convention - every
>> county uses the rules in their own way.

> I will like to compare the OSM details with the current NaPTAN and
> will try to do so soon.

Having taken a look in our Traveline data the bearing of this stop 
should be E and I have asked for that to be corrected in the source 
NaPTAN data.  In other respects from what I can see, the stop is 
correctly coded in NaPTAN.

In NaPTAN terminology the indicator "opp" means that it is opposite 
the Brewery Farm, (it does not mean that there is a sign opposite).

I am surprised if you say that in OSM a Custom and Practice (CUS) stop 
would not be coded as highway=bus_stop, as in public transport terms 
it is recognised as the location of a bus stop, even though there is 
not a flag on that side of the road.

You are correct to observe that there are some differences in NaPTAN 
practice between local authorities but some of this is historic and 
local authorities are working to harmonise the data towards the agreed 
standards.

Hope this helps.




-- 
Peter J Stoner
UK Coordinator         http://travelinedata.org.uk
Traveline

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