Key:landmark

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Public-images-osm logo.svg landmark
Osm element key.svg
Group: Marine
Used on these elements
use on nodes unspecifieduse on ways unspecifieduse on areas unspecifieduse on relations unspecified
Documented values: 15
Status: unspecified

Wikidata

Important note:
This key has never been really discussed publicly. This thread on the tagging mailing list suggests to deprecate these landmark tags when it's already existing and use instead a generic "maritime_landmark=yes". For instance, instead of "landuse=cemetery" + "landmark=cemetery", use "landuse=cemetery" + "maritime_landmark=yes". --Pieren 18:08, 30 December 2012 (UTC)

Note that maritime_landmark=yes is also undiscused and unused

Landmarks

It was proposed to tag every nautical landmark with seamark=landmark + landmark=*

The S57-catalog differs between a bunch of useful landmarks we should use in landmark=* at least:

Many of these have its own dedicated INT 1 symbol for rendering on nautical maps

osm-value IHO S-57 landmark IHO S-57 description IHO INT 1 symbol normally use this:
cairn cairn a mound of stones, usually conical or pyramidal, raised as a landmark or to designate a point of importance in surveying. (IHO Dictionary, S-32, 5th Edition, 601) INT-1-Q-100.png man_made=cairn
cemetery cemetery an area of land for burying the dead. INT-1-E-19.a.png landuse=cemetery
chimney chimney/smokestack a vertical structure containing a passage or flue for discharging smoke and gases. (Digital Geographic Information Standard - DIGEST) INT-1-E-22.a.png man_made=chimney
dish_aerial dish aerial a parabolic aerial for the receipt and transmission of high frequency radio signals. (IHO Dictionary, S-32, 5th Edition, 1400) INT-1-E-31.a.png man_made=satellite_dish
flagpole flagstaff(flagpole) a staff or pole on which flags are raised. (Digital Geographic Information Standard -DIGEST 1.28) INT-1-E-27.a.png man_made=flagpole
flare_stack flare stack a tall structure used for burning-off waste oil or gas. (IHO Dictionary, S-32, 5th Edition, 1836). Normally showing a flame and located at refineries (IHO Chart specifications, M-4). INT-1-E-23.png man_made=flare
mast mast a straight vertical piece of timber or a hollow cylinder. (adapted from Digital Geographic Information Standard - DIGEST) INT-1-E-28.c.png man_made=mast
windsock wind sock a tapered fabric sleeve mounted so as to catch and swing with the wind, thus indicating the wind direction. (Navigation dictionary, US National Oceanic and Atmospheric Administration - NOAA, 1969) aeroway=windsock
monument monument a structure erected or maintained as a memorial to a person or event. (Digital Geographic Information Standard - DIGEST) INT-1-E-24.a.png historic=monument
pillar column (pillar) a cylindrical or slightly tapering body of considerably greater length than diameter erected vertically. (Oxford English Dictionary) INT-1-K-43.2.png marker=pillar
memorial_plaque memorial plaque a slab of metal, usually ornamented, erected as a memorial to a person or event. memorial=plaque
obelisk obelisk a tapering shaft usually of stone or concrete, square or rectangular in section, with a pyramidal apex. (Adapted from Oxford English Dictionary) man_made=obelisk
cross cross a monument, or other structure in form of a cross. (Funk & Wagnalls Dictionary) INT-1-E-12.png historic=wayside_cross
dome dome a landmark comprising a hemispherical or spheroidal shaped structure (adapted from the Macquarie Dictionary). INT-1-E-10.4.a.png In some situations:

man_made=tower + tower:construction=dome

radar_scanner radar scanner a device used for directing a radar beam through a search pattern (adapted from Navigation Dictionary, US National Oceanic and Atmospheric Administration -NOAA, 1969) INT-1-E-30.2.b.png
tower tower a relatively tall structure which may be used for observation, support, storage or communication etc. (Digital Geographic Information Working Group -DGIWG, Oct. 1987) INT-1-E-20.a.png man_made=tower
windmill windmill a wind driven system of vanes attached to a tower like structure (excluding wind-generated power plants). (Digital Geographic Information Standard - DIGEST) INT-1-E-25.1.png man_made=windmill
windmotor windmotor a modern structure for the use of windpower. (IHO Chart Specifications, M-4) INT-1-E-26.1.a.png power=generator + generator:source=wind
spire spire/minaret a tall conical or pyramid-shaped structure often built on the roof or tower of a building, especially a church or mosque. (adapted from The New Shorter Oxford English Dictionary, 1993) INT-1-E-10.3.b.png man_made=tower + tower:type=minaret
large_rock large rock or boulder on land an isolated rocky formation or a single large stone (IHO Dictionary, S-32, 5th Edition 4415) natural=rock
rock_pinnacle rock pinnacle high tower or spire-shaped pillar of rock, alone or cresting a summit (adapted from IHO Dictionary, S-32, 5th Edition 3852) natural=rock

S57 into OSM-TAG-Translation

CATLMK; Category of landmark -> landmark=*
COLOUR; Colour -> landmark:colour=*
COLPAT; Colour pattern -> landmark:colour_pattern=*
CONDTN; Condition
CONRAD; Conspicuous, radar
CONVIS; Conspicuous, visually
ELEVAT; Elevation
FUNCTN; Function
HEIGHT; Height
NATCON; Nature of construction -> landmark:nature_of_construction=*
NOBJNM; Object name in national language -> name:DE=*, name:EN=* ....
OBJNAM; Object name -> name=*
STATUS; Status
VERACC; Vertical accuracy -> height:accuracy=*, depth:accuracy=*
VERDAT; Vertical datum -> height:datum=*, depth:datum=
VERLEN; Vertical length -> height=*, depth=*

See Also