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

[Jez Nicholson]

tagging: I'd put a note on it, and might consider a 'not:addr:house
number=14' if you really want to make the point that it is not a mistake

non-open corroborating data: 'survey' trumps everything

On Fri, 24 Sep 2021, 16:29 Mark Goodge, <mark at good-stuff.co.uk> wrote:

> 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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