# Key:topmark

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Used on these elements v · d · e topmark Group: Maritime Search Wikidata Status: unspecified taginfo · GB · IE · IN overpass-turbo

## How to map

topmark=*

OSM-value symbol description
cone_pointup is where the vertex points up
cone_pointdown cone, point down is where the vertex points down
sphere sphere a body the surface of which is at all points equidistant from the centre. (The New Shorter Oxford English Dictionary. 1993. vol 2) spheres are commonly used as International Association of Lighthouse Authorities - IALA topmarks (safe water).
2spheres two spheres two black spheres are commonly used as an International Association of Lighthouse Authorities - IALA topmark (isolated danger).
cylinder cylinder a solid geometrical figure generated by straight lines fixed in direction and describing with one of point a closed curve, especially a circle (in which case the figure is circular cylinder, it's ends being parallel circles). (The New Shorter Oxford English Dictionary. 1993. vol 2). cylinders are commonly used as International Association of Lighthouse Authorities - IALA topmarks (lateral).
board board usually of rectangular shape, made from timber or metal and used to provide a contrast with the natural background of a daymark. The actual daymark is often painted on to this board.
xshape x-shape having a shape or a cross-section like the capital letter X. (The New Shorter Oxford English Dictionary. 1993. vol 2) an x-shape as an International Association of Lighthouse Authorities - IALA topmark should be 3 dimensional in shape. It is made of at least three crossed bars.
upright_cross upright cross a cross with one vertical member and one horizontal member, i.e. similar in shape to the character '+'.
cube cube a solid contained by six equal squares; a regular hexahedron (The New Shorter Oxford English Dictionary. 1993. vol 2) cube, point up: a cube standing on one of its vertexes.
cube_pointup cube, point up a cube standing standing on one of its vertexes.
2cones_point2point 2 cones, point to point 2 cones, one above the other, with their vertices together in the centre.
2cones_base2base 2 cones, base to base 2 cones, one above the other, with their bases together in the centre and their vertices pointing up and down.
rhombus rhombus a plane figure having four equal sides and equal opposite angles (two acute and two obtuse); an oblique equilateral parallelogram. (The New Shorter Oxford English Dictionary. 1993. vol 2)
besom besom a bundle of rods or twigs. (The New Shorter Oxford English Dictionary. 1993. vol 1) perch: a staff placed on top of a buoy, rock or shoal as a mark for navigation. (IHO Dictionary, S-32, 5th Edition, 3734)
perch perch a staff placed on top of a buoy , rock or shoal as a mark for navigation. (IHO Dictionary, S-32, 5th Edition, 3734)
flag flag a flag mounted on a short pole.
sphere_over_rhombus shpere over rhombus A sphere located above a rhombus.
square square a plane figure with four right angles and four equal straight sides (The New Shorter Oxford English Dictionary. 1993. vol 2)
rectangle rectangle a plane figure with four right angles and four straight sides, opposite sides being parallel and equal in length (The New Shorter Oxford English Dictionary. 1993. vol 2) horizontal rectangle: where the two longer opposite sides are standing horizontally. vertical rectangle: where the two longer opposite sides are standing vertically.
horizontal_rectangle horizontal rectangle where the two longer opposite sides are standing horizontally.
vertical_rectangle vertical rectangle where the two longer opposite sides are standing vertically.
trapezium trapezium a quadrilateral having one pair of opposite sides parallel. (The New Shorter Oxford English Dictionary. 1993. vol 2) trapezium, up: which stands on its longer parallel side. trapezium, down: which stands on its shorter parallel side.
trapezium_up trapezium up which stands on its longer parallel side.
trapezium_down trapezium down which stands on its shorter parallel side.
triangle triangle a figure having three angles and three sides. (New Shorter Oxford English Dictionary. 1993. vol 2)
circle circle a perfectly round plane figure whose circumference is everywhere equidistant from its centre. (The New Shorter Oxford English Dictionary. 1993. vol 1)
2upright_crosses two upright crosses two upright crosses, generally vertically disposed one above the other.
tshape T-shape having a shape like the capital letter T.
triangle_pointup_over_circle triangle pointing up over a circle a triangle, vertex uppermost, located above a circle.
upright_cross_over_circle upright cross over a circle an upright cross located above a circle.
rhombus_over_circle rhombus over a circle an upright cross located above a circle.

## Aditional Tags

OSM-value symbol description
red red red
green green green
yellow yellow yellow
black black black (default)