[OSM-dev] Programatic reconstruction of postal code areas

Jo winfixit at gmail.com
Wed Mar 29 08:51:47 UTC 2017

I'm in Belgium, so I'm mostly familiar with postal codes here. There are
some oddities, but mostly they are not too illogical and it is possible to
draw polygons around/in between them.
It seems Alex already did this exercise for Austria and Switzerland, so I
think it's possible there as well. He'll probably needs to talk to the
mailing lists for each country separately to figure out whether there is
willingness to define (initial versions of) these boundaries.


2017-03-29 10:46 GMT+02:00 Tom Hughes <tom at compton.nu>:

> On 29/03/17 09:41, Jo wrote:
> For postal_code boundaries, they will very often follow existing
>> boundaries, except where they don't... so I would say it is possible to
>> draw them by mostly following the existing admin_boundaries.
> So now you appear to be talking about the UK which I do know about and
> which definitely doesn't have boundaries as such.
> Royal Mail as I understand it defines each post code by a list of
> addresses. They do also provide a centroid point derived from that list but
> I don't believe they provide any sort of boundary.
> Tom
> --
> Tom Hughes (tom at compton.nu)
> http://compton.nu/
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