Op vr 4 okt. 2019 om 14:07 schreef Russ Garrett <r...@garrett.co.uk>: > > On Fri, 4 Oct 2019 at 13:59, David Woolley <for...@david-woolley.me.uk> wrote: > > Although I don't have a primary source for this, my understanding is > > that the median is snapped to the nearest actual delivery point within > > the postcode. > > I was also under the impression that they were mathematical centroids > of the postcode area but the user guide [1] indeed says: "The point is > given the coordinates of the nearest delivery point to the calculated > mean position of the delivery points within the postcode unit." > (Although this may not be true for all entries - the PQI will provide > that info.)
FWIW the technical term is "medoid"... though I guess throwing new technical terms in is not my best contribution... > So I guess it would technically be possible to use Code-Point Open to > add at least one address location to OSM for most postcodes. I'm still > uneasy about doing this automatically though. I've long been frustrated by the uselessness of most OSM-based services wrt UK postcodes, and I agree with the argument that postcode medoids are not very different from many of the other "abstract-ish" things we have deliberately tagged in OSM - so, for me, I would support some kind of perhaps semi-automatic import process. Best Dan > [1] > https://www.ordnancesurvey.co.uk/documents/product-support/user-guide/code-point-open-user-guide.pdf > > -- > Russ Garrett > r...@garrett.co.uk > > _______________________________________________ > Talk-GB mailing list > Talk-GB@openstreetmap.org > https://lists.openstreetmap.org/listinfo/talk-gb _______________________________________________ Talk-GB mailing list Talk-GB@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-gb
