On Thu, 6 Feb 2020 at 13:40, Andrew Harvey <andrew.harv...@gmail.com> wrote:
> ruins:building=yes is not just tagging for other mappers, it's > accurately describing the feature on the ground, a ruined building. It's > not quite a building=yes, but not really nothing left on the ground, so > it's just part of the lifecycle. > Are you sure about that not being "just tagging for other mappers"? Have you seen how ruins:building=yes renders? Here's one I found using overpass-turbo: https://www.openstreetmap.org/way/701307813 Close the pane showing the tags and the nodes. What happens to the building then? It vanishes. Because ruins:building=yes DOES NOT RENDER. So only mappers will ever know it's there. Ordinary users, looking at the map, won't see it. But the ruins are visible to anyone passing by. If you want a ruined building to render, because the ruins are a visible landmark, then you should use building=yes + ruins=yes. Here's an abandoned church that's in ruins: https://www.openstreetmap.org/way/637904260 The abandoned:amenity=place_of_worship prevents the religious icon from rendering; the ruins=yes do not prevent the building=yes from rendering. Is this sensible tagging? See https://www.geograph.org.uk/photo/1923975 and https://www.genuki.org.uk/big/wal/CGN/Llechryd/HolyCross And that's why we need tags like ruins=yes as well as lifecycle prefixes. Because lifecycle prefixes prevent rendering of the tag they prefix, and that's sometimes exactly the right thing to do and sometimes exactly the wrong thing to do. -- Paul
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