-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Feargal Hogan wrote: > Hi > > First post to the list. > > I've been looking to get access to a set of polygons for the main English > administrative divisions. I'm not that concerned with the celtic regions for > the time being. This data <<IS>> available via ONS/OS but with licencing > restrictions. Better to use/create a free-to-use set, I thought.
What do you mean "Administrative divisions"? The UK situation is really complicated. For example, if you look at this page: https://www.cia.gov/library/publications/the-world-factbook/fields/2051.html The UK's entry is longer than any of the others. On the other hand, England is officially divided into 9 regions for some purposes, each of which is a collection of local authorities: * East * East Midlands * London * North East * North West * South East * South West * West Midlands * Yorkshire and the Humber Each has something around 5-10 million population. Scotland, Wales and Northern Ireland are often added to the list directly as they are not big enough to be subdivided on that scale. > 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 and > matched it against the NPE postcode data. It only managed to geocode about > 5% of the schools, but it was enough for my next proof-of-concept step. > Using the data I was able to create voronoi cells for each Local Education > Authority (well each one that contained at least one postcode in the NPE > dataset). You could try searching for the schools addresses directly in namefinder. Namefinder's postcode search actually does this if there are no results in NPE - it will search google for the postcode and when it finds a result that looks like an address, it will search for that address. You may be able to locate a lot more than 5% of schools that way. Ideally, schools shuold be marked on the map. It would be interesting to produce a list of the schools that are already in OSM and compare that to your list. It would give us a list of places where the mapping is unfinished. Also it might be nice to add operator=[local authority] (or similar) tags to all the schools. Is there a standard way to combine known boundaries with voronoi analysis? I guess you could reverse the boundaries into points 10m either side of them that make a voronoi diagram reproducing the original boundary, then add those points to the schools (and any other points) before regenerating. Robert (Jamie) Munro -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.8 (Darwin) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEYEARECAAYFAkmauDgACgkQz+aYVHdncI1ZoACeKxy/ljAKF7D1bQAtDpY3+MFt sDsAoMbcE+MnnIJwG6BqDGA2ge03FyfL =EsO5 -----END PGP SIGNATURE----- _______________________________________________ Talk-GB mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk-gb
