On Sun, 2020-06-28 at 09:33 +0100, Robert Skedgell wrote:
> Is it mapped or does it appear to be redacted on NLS's out-of-
> copyright
> OS maps?

Yes, for NLS and current OS displayed by MAGIC.

> On 28/06/2020 09:27, Tony OSM wrote:
> > I question the meaning of the word 'secret' when used in a
> > newspaper. My
> > observations are that secret means the reporter didn't know about
> > it.
> > 
> > Tony
The reporter was in one of the structures when it was drained.  [The
quality of local news reporting may be higher than much else because
the audience is people who are more likely in a better position to
know/check.]

> > On 28/06/2020 00:47, David Woolley wrote:

> > > How would another mapper verify this?  I normally think that
> > > people
> > > interpret the map only what's on the ground rule too literally,
> > > but in
> > > this case, I'd suggest the moral thing to do is to ignore your
> > > local
> > > knowledge an only map what can be seen, without guessing its
> > > significance.

They could look it up in the HE listing.  (Obviously I traced the
outline from imagery, not the OS data.)  I was actually mapping the
local listed buildings, partly to point the local history society to
OSM rather than Google maps on their web site.

> > > (There are some road signs entitled "secret bunker", e.g. for
> > > Kelvedon
> > > Hatch, but I don't think this is the case here.
> > > 
> > > On the other hand, there used to be part of the North Yorkshire
> > > moors
> > > that had "undefined" written over it on OS maps.)

With good vantage points around the obvious features, as for the
obvious green building that used to be below the area of the
reservoirs...  (For historical amusement, I don't off-hand know what
appeared there on 1970s maps, though I think there's one around
somewhere.  The OS7 and NLS versions may not be recent enough.)


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