[Talk-GB] Postcode data

Aidan McGinley aidmcgin+openstreetmap at gmail.com
Mon Jan 21 16:13:26 GMT 2013

@Brian - Yes I need to formulate how to QA this.  I'd like to automate the
QA as much as possible but having some elements done manually is obviously
beneficial and the more people that can cast their eye over it the better.
 Any volunteers please do let me know, and also if anyone has any ideas for
how to QA this do let me know.
@Robert - That accuracy check would be very easy to do as part of the QA
process, I'll add it to my list of To Do items.  I'll be able to give you
an indication of the number/percentage of postcodes potentially added after
I do a run against the full postcode file, right now I just don't know as
I've only been working with a very small subset.  Bear in mind there is
only 27,013 unique UK postcodes in OSM at present so any import is going to
be significant in my eyes.  For comparison the number of postcodes in the
ONS data that matches the criteria I outline above is 1.7M, so even a tiny
hit rate will result in a significant uplift to the data in OSM.

On 18 January 2013 10:43, Matt Williams <lists at milliams.com> wrote:

> On 17 January 2013 23:01, Rob Nickerson <rob.j.nickerson at gmail.com> wrote:
> > I would imagine that this would add a fair number of postcodes, and
> although
> > those interested in address lookup can just use the centroid database
> > without needing to go to OSM, this requires knowledge of the database
> (which
> > non-UK developers might not have) and does not link postcodes back to
> > address numbers and street names. Also recall that the Auto industry
> asked
> > in 2012 how OSM intends to bridge the gap between us and commercial map
> > providers. Something like this would be a good step in the right
> direction
> > in my opinion.
> >
> > From what I have heard, this sounds like a very cautious import and I am
> > happy to support it. It may even have lower "error" rates than some
> manual
> > edits!!
> >
> > RobJN
> >
> > p.s. Matt, if you are reading this, do you still update your graph of
> number
> > of postcodes added to OSM? Might be interesting to see it.
> Sure, the latest version (from the update a few days ago) is attached.
> The vertical axis represents my interpretation of how many delivery
> points we have with an address in the UK in OSM at the moment. This
> means I've expanded out interpolated ways and buildings with multiple
> addresses.
> The big straight section in the middle is from where I didn't update
> the tool for ages.
> --
> Matt Williams
> http://milliams.com
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