On Mon, Aug 17, 2009 at 1:06 PM, Ciarán
Mooney<general.moo...@googlemail.com> wrote:
> Hi,
>
> Seen this map before, very cool. Do you use the postcode=* or
> add:postcode=* to pull out the areas?
>

postal_code and addr:postcode taken from either nodes or ways -- they
all get turned into points then it creates a giant voronoi diagram and
pieces together polygons from continuous cells.

There's lots of streets tagged postal_code in the UK (mostly with just
the prefix from a street sign) and then recently there's lots of
buildings and points tagged with addr:postcode so those are included
too.

There are layers for data from the NPE and FTP projects too.

Last updated in May.

Dave

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