There are also in some countries "non-geographic postal codes" - things
like reply numbers and PO Boxes. If we are able to filter these out of
the data in some way it may make the job a little easier.
Although the UK postcodes are not defined as a boundary but as a list of
points, there are several "reverse geocoding" services in the UK which
implicitly will allow you to find the boundary that their algorithm+data
leads to. I have no idea how "accurate" their results are for a random
point, or indeed, how you would measure that accuracy.
//colin
On 2017-03-29 10:51, Jo wrote:
> 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.
>
> Polyglot
>
> 2017-03-29 10:46 GMT+02:00 Tom Hughes <[email protected]>:
> 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 ([email protected])
> http://compton.nu/
_______________________________________________
dev mailing list
[email protected]
https://lists.openstreetmap.org/listinfo/dev
_______________________________________________
dev mailing list
[email protected]
https://lists.openstreetmap.org/listinfo/dev
