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Posted by Brian Cryer on 11/27/06 13:07
"Dylan Parry" <usenet@dylanparry.com> wrote in message
news:4t035kF113o87U1@mid.individual.net...
> Brian Cryer wrote:
>
>> I think your figure for postcodes in the UK is probably the number in
>> England.
>
> Actually, it's for the whole of the UK, but I have performed some
> processing on the data to remove unwanted codes. For example, PAF
> includes residential and business postcodes as two distinct types, so in
> many cases there are duplicates if there are business and residential
> properties at the same postcode - I have simplified it to only include
> each one once.
>
> There are also some postcodes that are not given national grid
> coordinates. These are, I'm told, used for administrative purposes and
> as PO Box addresses. I didn't need these either, so they were also
> dropped.
>
> All-in-all I dropped several 100k postcodes from the database as being
> either duplicates or superfluous.
Yes, that makes sense.
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