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On Sun, Apr 28, 2019 at 11:44 AM Joseph Eisenberg < joseph.eisenb...@gmail.com> wrote: > I've added a new section to the Verifiability wiki page about mapping > features with ways or areas when these geometries are not verifiable. > > This has been discussed here several times in the past few months, in > regards to tags like natural=bay, natural=strait, place=*, and > proposals like natural=mesa. > > Please suggest any improvements to the wording or corrections: > https://wiki.openstreetmap.org/wiki/Verifiability#Geometry > > "Linear ways and areas can be non-verifiable if the geometry cannot be > demonstrated to be true or false by another mapper. > > "For example, a valley can be thought to refer to the whole area > between mountain ridges, or only to the flat bottom of the valley. In > this case, drawing the natural=valley as an area will usually not be > verifiable, because two different mappers would draw a very different > geometry for the same feature. Many settlements have non-verifiable > borders, especially in rural areas. > > "A place=hamlet often lacks verifiable borders. Hamlets in farming > areas often have scattered houses and farms extending outward for > several kilometers. In this case the approximate center of the place > may be well-know, but the outer limits are not clearly determined, so > mapping as an area is not verifiable. > > "A natural=ridge can be often be verifiably mapped as a linear way > along the line of the ridge crest. It cannot be verifiably mapped as > an area, because it would not be clear how far down the slopes the > area of the ridge extends. > > "Many features which are not verifiable as ways or areas can be mapped > with a single node near the center of the feature instead. In this > case it can be agreed that this node is within the feature, even > though the outer limits of the feature cannot be precisely > determined." > > _______________________________________________ > Tagging mailing list > Tagging@openstreetmap.org > https://lists.openstreetmap.org/listinfo/tagging >
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