Tag:historic=highwater_mark

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Public-images-osm logo.svg historic = highwater_mark
Praha, Bubeneč, Stromovka, povodeň 2002.JPG
Description
A marker indicating a past flood or high water. Show/edit corresponding data item.
Group: historic
Used on these elements
may be used on nodesshould not be used on waysshould not be used on areasshould not be used on relations (except multipolygon relations)
Useful combination
Status: in use

A high water mark is a marker indicating a past flood/high water of exceptional height – usually with a date (or just a year). Typically, this is a plaque on a wall, but it can also be something else such as an engraving in a wall, a painted marking on a wall, a pole or a stone with a marking (or several markings).

Tags used in combination

Alternative tags

historic=memorial+
memorial:type=flood_mark
Most frequently used (probably by a mapping project in 2016), but the subkey should be memorial=* ...
historic=memorial+
memorial=flood_mark
... however this variant is almost not used.
historic=flood_mark
high_water_mark=yes
It is not clear what object to use this tag with, and this is not a stand-alone top-level tag.

See also this OSM tag history as a curve chart which shows the development of the usage numbers of the different tags in comparison (precise historical data only between 2016–2018).

See also