<div dir="ltr"><div><div>Fantastic tool Robert! I've started a cleanup in Birmingham using this. It's amazing the number of typos you can insert in an original edit and QA tools like this are invaluable in unearthing them. I hope everyone can go on a postcde error hunt using this tool<br><br></div>Regards<br><br></div>Robert<br></div><div class="gmail_extra"><br><div class="gmail_quote">On 16 November 2016 at 20:33, Robert Whittaker (OSM lists) <span dir="ltr"><<a href="mailto:robert.whittaker+osm@gmail.com" target="_blank">robert.whittaker+osm@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">My daily report of addr:postcode value errors at<br>
<a href="http://robert.mathmos.net/osm/postcodes/osm-errors.html" rel="noreferrer" target="_blank">http://robert.mathmos.net/osm/<wbr>postcodes/osm-errors.html</a> seems to be<br>
being used by at least one other person, since the numbers of errors<br>
showing there has dropped significantly now. The page is regenerated<br>
daily, but unfortunately the data hasn't been refreshed for a few days<br>
now because the source data on which it relies (The Geofrabrik GB<br>
extract via the GB Taginfo instance) hasn't been updated in that time.<br>
<br>
I've also starting playing with a second report that lists location<br>
discrepancies of postcode-tagged OSM objects compared with the<br>
postcode centroid locations in Code-Point Open. This is less of an<br>
exact science, since postcodes will not all be located at the centroid<br>
for that postcode unit, and the allowable deviations vary depending on<br>
the unit. However, you can find an initial list of postcodes that are<br>
more than 1km from their official centroid at<br>
<a href="http://robert.mathmos.net/osm/postcodes/location-errors.cgi" rel="noreferrer" target="_blank">http://robert.mathmos.net/osm/<wbr>postcodes/location-errors.cgi</a> -- there<br>
are about 1500 of them, although quite a few are in groups where the<br>
same postcode is on multiple neighbouring objects. Presumably most of<br>
the 1500 will be cases of a typo being made by an editor or in the<br>
data source they used, so they'll need manual checking and updating.<br>
<br>
If anyone fancies looking at any of these please feel free to dive in.<br>
If you find any false positives (i.e. errors in the processing, or<br>
postcodes that genuinely are that far from their centroid), please let<br>
me know, and I'll see if there's anything that can be improved in the<br>
tool, or if they need to be marked manually as ok.<br>
<span class="HOEnZb"><font color="#888888"><br>
Robert.<br>
<br>
--<br>
Robert Whittaker<br>
<br>
______________________________<wbr>_________________<br>
Talk-GB mailing list<br>
<a href="mailto:Talk-GB@openstreetmap.org">Talk-GB@openstreetmap.org</a><br>
<a href="https://lists.openstreetmap.org/listinfo/talk-gb" rel="noreferrer" target="_blank">https://lists.openstreetmap.<wbr>org/listinfo/talk-gb</a><br>
</font></span></blockquote></div><br></div>