[Tagging] Quarry lakes

[Joseph Eisenberg]

ael,

All types of open pit mines are currently tagged as landuse=quarry, not
only stone and gravel quarries, but also coal mines, peat diggings, etc, so
it would be fine to use one tag for water bodies in old open pit mines and
old quarries:

"A quarry is an area of land used for surface extraction (open-pit mining)
of mineral or organic resources like rocks, gravel, sand, soil, clay, ore,
coal or peat." - https://wiki.openstreetmap.org/wiki/Tag:landuse%3Dquarry -
short description "area of land used for surface extraction (open-pit
mining)"

-- Joseph Eisenberg

On Thu, Dec 24, 2020 at 10:20 AM ael via Tagging <tagging at openstreetmap.org>
wrote:

> On Thu, Dec 24, 2020 at 12:22:20PM -0500, Brian M. Sperlongano wrote:
> > A commenter on the reservoir proposal[1] pointed out the existence of
> > quarry lakes[2], which is a lake that is formed after a quarry has been
> dug
> > after a mining operation.  It was suggested that such bodies of water
> > should be tagged separately from other lakes with a tag such as
> > water=quarry.
>
> I see one problem in that old deep mines also produce "lakes". For
> example https://www.openstreetmap.org/way/835299701. It is not a quarry.
> This is a important because Ordinance Survey maps show it as a quarry
> nevertheless, but this is believed to be an "Easter Egg". That is a
> deliberate mistake intended to detect copyright infringement.
>
> At the moment it is not tagged as natural=water or similar because it is
> not "natural". But it is in essence a small lake. I have no idea how
> deep it is. If the mine was properly capped and that cap is still in
> place it could be quite shallow. As there has been some sort of collapse
> it is hard to guess. Otherwise, it is several hundred metres deep at
> least. It can be seen on Bing imagery.
>
> > Should quarry lakes be tagged under a separate value from water=lake?
>
> That does seem sensible as long as there is another tag for the sort of
> situation above. I suppose water=flooded_mine is the obvious, but
> something more generic would be better.
>
> ael
>
>
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