I've started work using Codepoint Open to perform completeness studies of OSM postcode data. My plan is to do a rendering like [1] based on the codepoint data but colour each cell according to whether there's any matching OSM postcodes.
The problem I have is that there seems to be a large number of codepoint centroids with exactly the same coordinates (e.g. CV21 1WA, CV21 1WS, CV21 1YF plus about a few hundred more are all at -1.2504281683345,52.3798116758619). Are these postcodes which have no address points and so the OS have just put them all at a random point 'out of the way' or is it some error in the data? I'm hoping I can ignore them since they mess up the Voronoi diagram. ... Ahh, looking at the map [2] it seems that they are all located at the Royal Mail distribution office. My question still stands though: are these just surplus postcodes or some error? There are still other cases of duplicates though like can be seen nearby at [3]. -- Matt Williams http://milliams.com [1] http://random.dev.openstreetmap.org/postcodes/?layers=000F0F0FBT [2] http://www.raggedred.net/codepoint/?zoom=17&lat=52.37981&lon=-1.25043&layers=B0T [3] http://www.raggedred.net/codepoint/?zoom=18&lat=52.37459&lon=-1.2629&layers=B0T _______________________________________________ Talk-GB mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk-gb
