On Thu, 9 Apr 2020 at 09:21, Tony OSM <[email protected]> wrote: > If the data is to be in the public domain the next step has to be tagging. > Do we need country specific tags for these two pieces of data? > What should they be?
Looking at taginfo, there are a number of different tags in use for UPRN values (see https://taginfo.openstreetmap.org.uk/search?q=uprn where ref:NPLG:UPRN:1 is the most popular). I think it would be good to agree on a standard key to use before too many more are added. USRN values are more standardised: https://taginfo.openstreetmap.org.uk/search?q=usrn with ref:usrn and NPLG:USRN:1 being the only two keys in use. (NPLG presumably refers to the National Land and Property Gazetteer -- see https://en.wikipedia.org/wiki/National_Land_and_Property_Gazetteer -- but the middle two letters are the wrong way round.) I would have said that ref:uprn and ref:usrn are the natural choices for use to use. However, I've seen some calls for country codes to be added to 3rd-party ref values, so we might consider ref:UK:uprn and ref:UK:usrn instead. This isn't explicitly documented in the wiki at https://wiki.openstreetmap.org/wiki/Key:ref though the French community seems to be using it, as can be seen at https://wiki.openstreetmap.org/wiki/France/Liste_des_r%C3%A9f%C3%A9rences_nationales , and I think it might make sense. I don't see any value in adding NLPG (or it's incorrectly ordered variant NPLG). Although the National Land and Property Gazetteer is where the UPRN values originate from, if they're being used as core identifiers by the government, they're no longer just NLPG values. I also don't see any benefit in adding a :1 :2 etc suffix to the key in anticipation of multiple values (which seems to have been done in several existing UPRN keys). I think this will actually make it harder for data-users than having a single key name and separating multiple values with semi-colons. (You would suddenly need to search multiple different keys to get all possible UPRN-tagged objects.) So I'd propose that we use either ref:uprn and ref:usrn, or ref:UK:uprn and ref:UK:usrn. What does everyone else think? Robert. -- Robert Whittaker _______________________________________________ Talk-GB mailing list [email protected] https://lists.openstreetmap.org/listinfo/talk-gb
