[Talk-GB] UPRN wiki page

[Robert Skedgell]

On 17/11/2020 14:53, Cj Malone wrote:
> On Tue, 2020-11-17 at 14:10 +0000, Jez Nicholson wrote:
>> Whilst i'm here, am I correct that a UPRN can *only* be on a single
>> thing?
>> So anything in
>> https://taginfo.openstreetmap.org/keys/?key=ref%3AGB%3Auprn#values mo
>> re
>> than once is an error?
>>
>> ...or can a road have a USRN *and* a UPRN?
>
> As far as I know a road should have only 1 USRN, but it can have
> multiple UPRNs. I think it's mainly if it goes over a admin boundary,
> each area will have a UPRN but the road will have one USRN.
>
> Also OSM often has multiple ways per road, each of these ways should
> share a USRN and more often than not share the UPRN.

Roads can have more than one USRN. I've come across some sections of
road which appear to have more than one Designated Street Name record
(possibly streets which cross authority boundaries?). In addition to
this, there may be records of types Unofficial Street Name, Officially
Described Street and Numbered Street.

Details of the USRN specification are here
https://www.ordnancesurvey.co.uk/documents/product-support/tech-spec/open-usrn-techspec-v1.1.pdf