[Talk-GB] Importing NaPTAN Data

Silent Spike silentspike100 at gmail.com
Tue Jul 2 09:44:14 UTC 2019

On Tue, Jul 2, 2019 at 10:00 AM David Woolley <forums at david-woolley.me.uk>

> In may experience, a lot of the original NaPTAN imports have decayed:
> - people have double mapped stops and the the NaPTAN one has been deleted;
> - stop have moved and got double mapped and deleted as a result;
> - stops have been temporarily out of service, e.g whilst redeveloping a
> bus station, and been deleted and then lost the NaPTAN associations when
> remapped.

I'm not sure why double mapping is occurring, but it seems to me that (even
with these mapping mistakes) having the stops present in OSM is better than
not using the data at all. If conflation can be done once, it can be
repeated in future if data needs to be imported as an update.

 On Tue, Jul 2, 2019 at 10:00 AM David Woolley <forums at david-woolley.me.uk>

> Also, all bus stops need continual maintenance because names get changed
>   as landmarks come and go.
> Given that few people like maintenance work, if you can't map all the
> stops from first principles, it is very unlikely that imported ones will
> get maintained.  Retaining the NaPTAN tagging is important in allowing
> any later remerge of the updated NaPTAN data.

I gather that you're suggesting future data imports will be needed to keep
stop data up-to-date and so the NaPTAN tagging is needed to make that
process easier? In which case I agree, although I still don't see what use
the tags other than the NaPTAN ATCO code provide. It appears to be a stable
identifier, which means by including it in OSM the NaPTAN data is directly
associated with the tagged OSM element (reducing the need to maintain
tagging in OSM).

 On Tue, Jul 2, 2019 at 10:00 AM David Woolley <forums at david-woolley.me.uk>

> Another problem with NaPTAN stops, which applies to non-OSM users as
> well is that they have virtual stops in Hail and Ride areas.  Routers
> seem to only like people boarding at those place, so, in my case, can
> take me about 7 minutes out of my way against the direction of travel,
> so tell me I have missed a bus that could be easily caught

At present I don't intend to include hail and ride data in my import
process. Would need to investigate further how best to handle it and I'm
personally only interested in clearly marked bus stops.

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