Key:seamark:bridge:clearance_width

Seamark tagging

• General information
• Tags
• Schema
• Objects, usage
• Categories of objects, attributes
• INT-1 cross reference
• Inland notice marks (CEVNI, Europe)
• Inland lateral marks (CEVNI, Europe)
• Inland notice marks (BNIWR, Brazil)
• Inland notice marks (PPWBC, Brazil/Paraguay)
• Inland notice marks (RIWR, Russia)

Bridges

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.

Categories

Category (CATBRG)	seamark:bridge:category	Note	Definition	Photo
Fixed bridge	fixed	preferred category. If known, add seamark:bridge:clearance_height=*	A bridge having permanent horizontal and vertical alignment.
Opening bridge	opening	preferred category. If known, add seamark:bridge:clearance_height_closed=*	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.
Lifting bridge	lifting	preferred category. If known, add seamark:bridge:clearance_height_closed=* and seamark:bridge:clearance_height_open=*	A movable bridge (or span thereof) which is capable of being lifted vertically to allow vessels to pass beneath.
Swing bridge	swing	opening, if known, add seamark:bridge:clearance_height_closed=*	A movable bridge (or span thereof) which rotates in a horizontal plane about a vertical pivot to allow the passage of vessels.
Bascule bridge	bascule	opening, if known, add seamark:bridge:clearance_height_closed=*	A counterpoise bridge rotated in a vertical plane about an axis at one or both ends.
Pontoon bridge	pontoon	ambiguous: might be fixed or opening	A fixed floating bridge supported by pontoons.
Drawbridge	drawbridge	opening, if known, add seamark:bridge:clearance_height_closed=*	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.
Transporter bridge		fixed, if known, add seamark:bridge:clearance_height=*	A bridge that has towers on each side of the waterway connected by a girder system on which a carriage runs.
Foot bridge	footbridge	ambiguous: might be fixed, opening, lifting	A bridge structure used only for pedestrian traffic.
Viaduct	viaduct	fixed, if known, add seamark:bridge:clearance_height=*	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	fixed, if known, add seamark:bridge:clearance_height=*	A bridge supporting an artificially elevated channel, for the conveyance of water.
Suspension bridge	suspension	ambiguous: might be fixed or lifting	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.

Clearances

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

Tools

• JOSM preset seamark:type=bridge/gate
• JOSM style european-waterways-classification
• JOSM style INT 1 Rendering (IHO standarized symbols) PD

See also

• bridge=* - bridges for normal mapping

References

OSM seamark resources

• Seamark tag values(en)
• Seamark objects(en)
• Seamark attributes(en)
• Categories of objects(en)
• INT-1 cross reference(en)
• Inland waterway notice marks (CEVNI, Europe)(en)
• Inland waterway lateral marks (CEVNI, Europe)(en)
• Inland waterway notice marks (BNIWR, Brazil)(en)
• Inland waterway notice marks (PPWBC, Brazil/Paraguay)(en)
• Inland waterway notice marks (RIWR, Russia)(en)

JOSM presets & styles

• https://github.com/OpenNauticalChart/josm

External sources

• S-101 ENC/iENC registry (iho.int), the ENC Data Classification and Encoding Guide (DCEG) can be downloaded as zipped PDF, online access to symbols in Portrayal Register
• International nautical chart symbol legend (Chart INT-1, NOAA)
• Encoding Guide for Inland ENCs (openecdis.org, 2018), an international standard of the Inland ENC Harmonization Group is currently in development (IEHG Publication S-401, 2019)
• European Code for Inland Waterways (CEVNI), (UNECE, Fifth revised version 2015)
• European Code for Signs and Signals on Inland Waterways (SIGNI), (UNECE Resolution N0. 90, 2018)
• U.S. Aids to Navigation System – also details the Western Waters Marking System, Intracoastal Waterway system, and Uniform State Waterway Marking System