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<div class="moz-cite-prefix">On 29/07/2019 13:05, Paul Allen wrote:<br>
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<div>It applies to more than just quarries. The problem is
that the namespaced version, when</div>
<div>applied to physical objects, renders them invisible (on
standard carto).</div>
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<p>Please let's just stop worrying about just that one renderer...</p>
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<div>It's fine with usages. I've mapped pubs that have
recently closed and it is uncertain if they</div>
<div> will re-open as a pub, re-open as something else, be
turned into a residence or the</div>
<div>building itself become disused. I've been tagging them
as disused:amenity=pub</div>
<div>Some people with what I view as an over-strict
interpretation of rules may say that's</div>
<div>mapping the history of the thing and OSM doesn't map
history, but I ignore them.</div>
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<p>It's perfectly possible for renderers to make sense of namespaced
tags (and even, with a bit more difficulty, tags such as
"landuse=quarry; disused=yes") and do whatever they want with them
(obligatory example
<a class="moz-txt-link-freetext" href="https://github.com/SomeoneElseOSM/SomeoneElse-style/blob/master/style.lua#L1496">https://github.com/SomeoneElseOSM/SomeoneElse-style/blob/master/style.lua#L1496</a>
and
<a class="moz-txt-link-freetext" href="https://map.atownsend.org.uk/maps/map/map.html#zoom=20&lat=53.9994944&lon=-1.136121">https://map.atownsend.org.uk/maps/map/map.html#zoom=20&lat=53.9994944&lon=-1.136121</a>
).</p>
<p>As already mentioned the tricky bit is working out what "disused"
means for e.g. a quarry. A map that wanted to show actual places
where rock was extracted wouldn't show an inactive hole in the
ground, whereas one that wanted to show holes in the ground would
still show them.<br>
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<div>However, there are several buildings in my town that are
clearly disused. Peeling paintwork,</div>
<div>broken windows, no sign of activity for many years. If I
use disused:building=yes they</div>
<div>vanish from the map but they're observable in reality,
which means the map doesn't</div>
<div>show something that is physically present. Using
disused=yes is a way around this.</div>
<div>Call it tagging for the renderer if you want, but it's
not lying for the renderer.</div>
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<p>A building that isn't used for anything is still in actuality a
building (until it falls or is knocked down), so I probably
wouldn't use that tag personally, although there is mid-level
usage in e.g. the UK: <a class="moz-txt-link-freetext" href="https://overpass-turbo.eu/s/L9H">https://overpass-turbo.eu/s/L9H</a> .<br>
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<p>Best Regards,</p>
<p>Andy</p>
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