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Available languages — Tag:seamark:type=bridge
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Public-images-osm logo.svg seamark:type = bridge
Osm element tag.svg
Bridges with significance for navigation
Used on these elements
may be used on nodesmay be used on waysmay be used on areasshould not be used on relations
Status: in use


The tags defined on this page will render in various nautical charts (zoom-level 16 and higher).

An other example: Navigable Waterways, Europe (zoom-levels 1-13)

For routing purpose, the tag should be placed on the waterway beneath the bridge.

This page defines tags for the attributes of bridges.

Type S100 code seamark:type Definition
Bridge BRIDGE bridge A structure erected over a body of water to provide a roadway for vehicles, pedestrians or to carry utility services.

This page defines values for the "seamark:bridge:category=*" tags and other attributes applied to fog signals.


Category (CATBRG) seamark:bridge:category Definition Photo
Fixed bridge fixed A bridge having permanent horizontal and vertical alignment.
Opening bridge opening A bridge that is closed when set for carrying road traffic and open when set to permit marine traffic to pass through the waterway it crosses.
Swing bridge swing A movable bridge (or span thereof) which rotates in a horizontal plane about a vertical pivot to allow the passage of vessels. MovableBridge swing.gif
Lifting bridge lifting A movable bridge (or span thereof) which is capable of being lifted vertically to allow vessels to pass beneath. MovableBridge lift.gif
Bascule bridge bascule A counterpoise bridge rotated in a vertical plane about an axis at one or both ends. MovableBridge draw.gif
Pontoon bridge pontoon A fixed floating bridge supported by pontoons.
Drawbridge drawbridge A general name for bridges of which part or the entire span of the bridge may be raised or drawn aside to allow ships to pass through. Drawbridge.gif
Transporter bridge transporter A bridge that has towers on each side of the waterway connected by a girder system on which a carriage runs. MovableBridge transport.gif
Foot bridge footbridge A bridge structure used only for pedestrian traffic.
Viaduct viaduct A long bridge consisting of a series of beams, spans or girders (of steel, timber or concrete) supported on towers or piers and used to carry a road, railroad, etc.
Aqueduct aqueduct A bridge supporting an artificially elevated channel, for the conveyance of water.
Suspension bridge suspension A fixed bridge consisting of either a roadway or a truss suspended from two or more cables which pass over towers and are anchored by backstays to a firm foundation. Bridge-suspension-anchorages.svg

Other Attributes

Attribute seamark:bridge:<attribute> Value type Definition
Horizontal clearance (HORCLR) clearance_width Decimal The width that is available for safe navigation.
Vertical clearance (VERCLR) clearance_height Decimal The vertical clearance measured from the surface plane towards the object overhead.
Vertical clearance, closed (VERCCL) clearance_height_closed Decimal The vertical clearance the bridge in closed condition measured from the surface plane towards the object overhead.
Vertical clearance, open (VERCOP) clearance_height_open Decimal The vertical clearance of the bridge in opened condition measured from the surface plane towards the object overhead.

See also


Seamark Tag Values
Seamark Objects
Seamark Attributes
INT-1 Cross Reference