[OSM-talk] Post code areas

[Richard Weait]

On Thu, Apr 1, 2010 at 6:31 AM, colliar <colliar4ever at aol.com> wrote:
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> Also hi
>
> Frederik Ramm schrieb:
>>     we're thinking about importing post code areas in Germany. Are post
>> code areas being mapped in other countries already, and if so, using
>> what tagging schema?
>
> +1
>
>> I was thinking of creating multipolygon boundary relations with
>> boundary=post_code_area or so.
>
> In rural areas you often can use the administrative boundaries but in cities
> this often does not work, because the postcode boundaries differe to the suburb
> boundaries. I added the postcode to a associatedStreet relation using
> addr:postcode=* and split the relation in parts (one for each postcode) if there
> exists more then one.

Canadian Postal Codes can indicate an entire small town, or a portion
of a very large building.  Suburban Postal Codes often refer to a
dozen or so houses on one side of the street.  Neighbours on the other
side of the street, or across the back yard have a different postal
code.
http://en.wikipedia.org/wiki/Postal_codes_in_Canada#Components_of_a_postal_code