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Posted by Dylan Parry on 11/27/06 12:14
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.
--
Dylan Parry
http://electricfreedom.org | http://webpageworkshop.co.uk
Programming, n: A pastime similar to banging one's head
against a wall, but with fewer opportunities for reward.
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