My daily report of addr:postcode value errors at http://robert.mathmos.net/osm/postcodes/osm-errors.html seems to be being used by at least one other person, since the numbers of errors showing there has dropped significantly now. The page is regenerated daily, but unfortunately the data hasn't been refreshed for a few days now because the source data on which it relies (The Geofrabrik GB extract via the GB Taginfo instance) hasn't been updated in that time.
I've also starting playing with a second report that lists location discrepancies of postcode-tagged OSM objects compared with the postcode centroid locations in Code-Point Open. This is less of an exact science, since postcodes will not all be located at the centroid for that postcode unit, and the allowable deviations vary depending on the unit. However, you can find an initial list of postcodes that are more than 1km from their official centroid at http://robert.mathmos.net/osm/postcodes/location-errors.cgi -- there are about 1500 of them, although quite a few are in groups where the same postcode is on multiple neighbouring objects. Presumably most of the 1500 will be cases of a typo being made by an editor or in the data source they used, so they'll need manual checking and updating. If anyone fancies looking at any of these please feel free to dive in. If you find any false positives (i.e. errors in the processing, or postcodes that genuinely are that far from their centroid), please let me know, and I'll see if there's anything that can be improved in the tool, or if they need to be marked manually as ok. Robert. -- Robert Whittaker _______________________________________________ Talk-GB mailing list [email protected] https://lists.openstreetmap.org/listinfo/talk-gb
