[Talk-GB] Postcodes

[Adam Snape]

Hi,

I'm not on about extrapolating postcodes for other buildings on a street,
but we should be able to map the postcode of building on which the centroid
is placed, shouldn't we? Zooming in should allow us to see which building a
centroid is on.

Kind regards,

Adam

On Fri, 9 Nov 2018 at 13:44, Philip Barnes <phil at trigpoint.me.uk> wrote:

> On Fri, 2018-11-09 at 13:26 +0000, David Woolley wrote:
> > If centroid has the plain (mathematical) meaning of the word, it
> > will
> > only fall exactly on the building centre if there is only one
> > building
> > in the postcode area.
> >
> > In practice the building nearest the centroid might have its own
> > postcode, so you can't rely on the nearest building to the centroid
> > having that postcode.
> >
> > There are, at least theoretically (e.g. a C shaped postcode) where
> > the
> > centroid is in an adjoining postcode.  I imagine you would get this
> > if
> > there was a cul-de-sac projecting into a crescent that was small
> > enough
> > to have one post code.
> >
> I live in such a road, it is big enough to have different postcodes for
> odd and even numbers. The two centoids are very close together and it
> would not be possible to determine which is which without local
> knowledge.
>
> Phil (trigpoint)
>
>
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