On 5 December 2016 at 20:19, Dave Barter <[email protected]> wrote: > Excuse the noob question as I’ve not been on the list long. > > I’m doing a bit of work trying to create an open version of the OS Codepoint > Polygons. To do this I need as much postcode data as possible. I’ve been > looking at extracting this from OSM and as far as I can tell I’m looking for > the following tags:- > > -addr:postal_code > -addr:postcode > -postal_code > -postcode > > Are there any others I’m missing? And I guess I am (sadly) right in thinking > there is not a huge amount of data in there, circa 40-50k records?
addr:postcode is the most common tag. postal_code is still used a lot, particularly as a hangover from edits made before the addr:* tags were introduced. Though some may continue to use it in a slightly different context. postcode=* and addr:postal_code=* have far fewer uses, and are probably only used by mistake. From just addr:postcode alone, there are around 725k objects tagged with around 111k different postcode values in Great Britain (excluding NI) and some surrounding islands. See http://taginfo.openstreetmap.org.uk/keys/addr%3Apostcode for the stats. That's still quite a way off the 28 million addresses and 1.7 million postcodes in AddressBase/PAF. Not all the postcodes in OSM are complete or accurate though -- see my tools at http://robert.mathmos.net/osm/postcodes/osm-errors.html and http://robert.mathmos.net/osm/postcodes/location-errors.cgi . Robert. -- Robert Whittaker _______________________________________________ Talk-GB mailing list [email protected] https://lists.openstreetmap.org/listinfo/talk-gb
