I'm sure that in one of the SotM talks someone mentioned that there are no right-angled buildings in New York City (or at least downtown Manhattan). I'll see if I can find the relevant talk.
The general issue is really one of poorly mapped buildings, for which non-squaring is just a proxy measure. Pierre Beland's talk on the first day was about finding such areas (especially wrt HOT mapping). Some years ago whilst helping Ralph (another person I didn't get to talk to at SotM, Hi1) do validation at one of the London Missing Maps events I noticed a quirky thing. If you square a building in JOSM and then resquare it in iD or Potlatch the nodes move slightly. Apparently the reason is that JOSM squares based on a geoid whilst the other two editors just work on the principle that the editor viewpoint is small enough that one can use 'naive' geometry operations. I imagine for accurately surveyed & designed buildings JOSM's algorithm is likely to introduce additional errors because the architects/engineers will have used British Grid. Jerry On Mon, 30 Sep 2019 at 11:17, Jez Nicholson <jez.nichol...@gmail.com> wrote: > Some people seem quite animated about non-squared buildings in OSM....can > anyone tell me why it matters so much? because 'accuracy'? > > - Jez > _______________________________________________ > Talk-GB mailing list > Talk-GB@openstreetmap.org > https://lists.openstreetmap.org/listinfo/talk-gb >
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