Vào lúc 09:42 2020-12-18, Martin Koppenhoefer đã viết:
Am Fr., 18. Dez. 2020 um 12:32 Uhr schrieb Paul Allen
<pla16...@gmail.com
<mailto:pla16...@gmail.com>>:
I'm not entirely happy with natural=water being applied to either sewage
treatment or slurry. Neither are natural and neither store water.
neither am I, not for the question of how "natural" they are (ship has
sailed) but because I would not consider "slurry" to be "water",
although they contain mostly water (looking at the parts) - 10% sulfuric
acid is also mostly water. Milk is also mostly water, as is beer.
I'm glad I'm not alone in stubbornly avoiding the troll-tagging of
tailing ponds and pig lagoons as natural=water. I'm fine with putting
most reservoirs under natural=water, but this tag doesn't have to hold a
monopoly on bodies of liquid. After all, clorinated pool water is mostly
water, but we use leisure=swimming_pool as has been mentioned. A marsh
is mostly covered by naturally collecting water, but there's
natural=wetland and a whole wetland=* tagging scheme for that.
Most paper maps I've come across have treated bodies of water as
distinct from bodies of other liquids, if they show the latter at all.
For example, the USGS topographic maps cited earlier in this thread make
no distinction between natural lakes and dammed reservoirs, but tailing
ponds have completely different symbology. [1] If a renderer were
unprepared to give special treatment to tailing ponds, I personally
think it would be better for the renderer to omit them than to render
them as bodies of water. That might require an altogether different
primary tag like man_made=reservoir, since it's so common to render
landuse=reservoir just like natural=water.
landuse=reservoir is an unintuitive tag for water-filled reservoirs,
anyways. The pedant in me wants to double-map a reservoir as two areas:
a landuse=reservoir area for the land underneath and a coincident,
connected natural=water area for the H2O above it. But people complain
about connecting landuse areas to other features, so I'll have to wait
until April Fool's Day. ;-)
[1]
https://pubs.usgs.gov/gip/TopographicMapSymbols/topomapsymbols.pdf#page=4
--
m...@nguyen.cincinnati.oh.us
_______________________________________________
Tagging mailing list
Tagging@openstreetmap.org
https://lists.openstreetmap.org/listinfo/tagging
