@simon If I had a penny for every time I've unpicked a needlessly complicated multi-polygon relation with tens of chopped-up shared way segments, and replaced then with two simple ways, I could buy us both a beer! đ» đą
Map for maintenance, #SimpleIsBetter , don't try to be too clever in #OpenStreetMap
(Oh, and learn about the #JOSM balloon tool - much easier for landcover, even when construction lines are needed to constrain it.)



