[Talk-transit] NaPTAN Import

Christoph Böhme christoph at b3e.net
Tue Aug 4 22:27:33 BST 2009


Peter Miller <peter.miller at itoworld.com> schrieb:

> 
> On 1 Aug 2009, at 22:51, Thomas Wood wrote:
<snip>
> > Ooops, I linked the wrong changeset!
> > http://api06.dev.openstreetmap.org/browse/changeset/389 was my
> > intent.
> 
> A couple of comments.
> 
> Firstly, the locality field is an important part of the name in  
> NaPTAN. The stop name can be constructed in a number of ways
> depending on how much precision is needed and what the geographic
> context is.
> 
> For example, let's take this stop outside a pub called 'The  
> Woodman' (which is in Ashteed).
> http://api06.dev.openstreetmap.org/browse/node/396115
> 
> If the context for the enquiry was Ashteed itself, then one could
> say 'The Woodman (Adj)'. If the context was wider and one still
> needed to be precise one would say: 'Ashteed, The Woodman (Adj)'.
> 
> Localities themselves are not always unique so there is the  
> possibility for a locality to have a qualifier in NaPTAN. The full  
> description for a bus stop called 'Long Road' in Cambridge in  
> Cambridgeshire (rather than the one in Gloucestershire) would be  
> 'Cambridge (Cambs), Long Road (opp)'. If the context was east anglia  
> then one could drop the qualifier and it would become 'Cambridge,
> Long Road (opp)'. If the context was Cambridge itself then one could
> use 'Long Road (opp)'.
> 
> So... what to do. I suggest we need a naptan:locality field which  
> should contain the naptan locality name or possibly also  
> naptan:natgazid as a unique reference for the place (to accommodate  
> multiple localities with the same name).
> 
> I am not clear what we do, but we need to do something.

To me the functionality of the naptan:locality tag appears to be similar
to the one of the is_in tag on places. With the introduction of
boundaries these tags become less important in my opinion as you can
easily find out the location of a feature by looking in which areas it
is in.

I think, putting the NaPTAN data in OSM is similar to drawing them on a
map: The map (i.e. OSM) provides a rich context from which much
information wich was stored as properties of the bus stops before can
be derived.

Cheers,
Christoph

> 
> Regards,
> 
> 
> 
> Peter
> 
> 
> 
> 
> 
> >
> >>
> >>> We're then ready to begin uploading to the main database.
> >>
> >> Cool :-)
> >>
> >> Cheers,
> >> Christoph
> >>
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> >> Talk-transit at openstreetmap.org
> >> http://lists.openstreetmap.org/listinfo/talk-transit
> >>
> >
> >
> >
> > -- 
> > Regards,
> > Thomas Wood
> > (Edgemaster)
> >
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> > Talk-transit at openstreetmap.org
> > http://lists.openstreetmap.org/listinfo/talk-transit
> 
> 
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