[Talk-GB] English administrative divisions cleanup/fixup
peter.miller at itoworld.com
Mon Feb 16 10:41:07 GMT 2009
There is some admin_area data in the NaPTAN import that will be
happening soon given that every bus stop is associated with a
transport authority (county/unitary authority/Passenger Transport
We will be discussing the details of this import on talk-transit and
you might like to get involved.
On 15 Feb 2009, at 14:19, Feargal Hogan wrote:
> First post to the list.
> I've been looking to get access to a set of polygons for the main
> administrative divisions. I'm not that concerned with the celtic
> regions for
> the time being. This data <<IS>> available via ONS/OS but with
> restrictions. Better to use/create a free-to-use set, I thought.
> Working on the basis that I needed to create it myself, I took the
> list of
> schools at http://www.showusabetterway.co.uk/call/data.html#schools
> matched it against the NPE postcode data. It only managed to geocode
> 5% of the schools, but it was enough for my next proof-of-concept
> Using the data I was able to create voronoi cells for each Local
> Authority (well each one that contained at least one postcode in the
> These were not very accurate in most cases, but some data is better
> My next step was to see if I could 'help' the voronoi analysis by
> the areas where there was already free boundary polygons available.
> took me back to OSM. So I extracted the boundary data for England
> something like
> and had a good browse through it to see what I was getting. The
> 'free-tagging' nature of the OSM data (and this is not a criticism,
> just an
> observation) means that it is difficult to quantify the quality of
> the data,
> and also it is difficult to filter the dataset into something
> meaningful and
> useful, at least for my purposes.
> I figure that I am going to have to do a fair bit of clean-up on
> this data
> before it is useful to me. What would be a real waste of time would
> be for
> me to do all the cleanup, and then NOT reflect it back into the OSM
> Whilst I have done quite a bit of interactive editing using potlatch
> josm, I haven't done any dataset uploads.
> So my questions are:
> 1) How should I approach such a data cleanup operation? and
> 2) Are there any agreed data tagging standards for the UK or more
> specifically for England?
> Appreciate any comments or suggestions you might have.
> Feargal Hogan
> Talk-GB mailing list
> Talk-GB at openstreetmap.org
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