[Talk-GB] Correcting an error when the only correct data sources are non-open

[SK53]

We had a recent case where postcodes had been assigned officially & then
changed. The old postcodes are what was present in NSUL in June.
The wrong road name is not uncommon either: usually when the break in road
names is not obvious and the address is of a business without a housenumber.

The actual worst case I can recall was the former Austin Reed shop in
Nottingham. The council, Austin Reed & Royal Mail all had different ideas
of what the address was. To be fair, the shop had entrances both in a
covered shopping arcade (unit x) and a street with different names on the N
& S sides.

In these cases I suspect there is some value in adding the UPRN (if
unambiguous) so that the non-open sources can be queried by a user.

Jerry



On Mon, 27 Sept 2021 at 09:55, Andy Robinson <ajrlists at gmail.com> wrote:

> I've noticed that this happens quite a lot with postcodes too, especially
> when residents take up a newly built commercial/retail unit on a new
> development. My assumption is that someone, not necessarily the post
> office,
> gives them a postcode and they run with for opening launch and website
> update etc. Maybe they eventually get corrected. I suspect some never do.
> Anyway, I decided long ago life was too short to worry about it and tagged
> the postcode that seemed most appropriate.
>
> Cheers
> Andy
>
> -----Original Message-----
> From: Mark Goodge <mark at good-stuff.co.uk>
> Sent: 24 September 2021 16:26
> To: talk-gb at openstreetmap.org
> Subject: [Talk-GB] Correcting an error when the only correct data sources
> are non-open
>
> I've just updated a couple of retail units in my town that have recently
> changed hands and now have new tenants, to replace the old names with the
> new ones and update the ancillary tags appropriately. So far, so good. No
> problems there.
>
> However, in the course of doing so, I decided to have a quick click round
> some of the other nearby units, just in case I could fill in any useful
> tags, and found that one of them had the wrong address - specifically, the
> wrong number (it should be 16, but was given as 14).
>
> Now, I know what the actual address of that location is, from previous
> knowledge of that particular unit when it was in the hands of a friend of
> mine, and both the local council's property database and the Royal Mail PAF
> agree with me, as does OS Mastermap. So I am certain that my knowledge is
> correct. But... I can't find any open data source which says the same
> thing.
> And, annoyingly, the current occupant's own website has the wrong number on
> it (which is where I suspect that the previous mapper got their data from).
>
> I've made the change anyway, and tagged the source as local knowledge
> (which, in a sense, it is). But my change is vulnerable to being reverted
> by
> someone else who goes by the occupant's website, and I can't use the PAF or
> Mastermap as sources in OSM as that's not open data.
>
> What would other people do in this situation? How do you correct an error
> when the only correct sources are non-open?
>
> Mark
>
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