On 09/04/2020 17:18, Andy Mabbett wrote:
On Thu, 9 Apr 2020 at 13:06, Mark Goodge <m...@good-stuff.co.uk> wrote:
They're a 10 to 12 digit integer.
Is there a check digit?
No, they're a simple sequential allocation. So an error can't be
detected internally, it does need to be verified. But the same is true
of postcodes and phone numbers, of course.
Similarly to the way that telephone numbers are allocated, though, UPRNs
are allocated in blocks to local authorities who then assign them out of
their block. So the first few digits of a UPRN will tell you
approximately where in the country it is. In fact, you can already link
a UPRN to administrative geography via existing open data, it's only
drilling right down to precise coordinates that isn't currently possible.
If I was designing the checkout process for an online retailer that
allowed customers to enter their UPRN rather than a postal address, what
I'd do is show them a map, with their UPRN location marked, and ask them
to confirm that that is, indeed, the premises they want the item
delivered to. That could be done entirely using open data (once UPRNs
are open), but a commercial supplier might also want to enhance that by
using an address lookup to generate the geographic address from the UPRN
and display that to the customer as well.
Mark
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