Key:seamark:rock:water_level
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 seamark:rock:water_level
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| Description |
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The vertical extent of a seamark:type=rock relative to the water surface. 
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| Group: marine navigation |
| Used on these elements |
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| Useful combination |
| Status: in use |
| Tools for this tag |
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Seamark tagging
Rocks
The tags defined on this page will render in various nautical charts.
| Type | S100 code | seamark:type | Definition |
|---|---|---|---|
| Underwater/awash rock | UWTROC | rock | A concreted mass of stony material or coral which dries, is awash or is below the water surface. |
The rendering depends on the value of the water level attribute:
| Water level (WATLEV) | seamark:rock:water_level | Definition | Rendering |
|---|---|---|---|
| Covers and uncovers | covers | Periodically extends above and is submerged below the surface. | 
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| Awash | awash | Flush with, or washed by the waves at low water under average meteorological conditions. | 
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| Other values | submerged, etc. | Any rock that presents a danger to navigation. | 
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Not to be confused with Shoal, which is unconcreted material like sand or mud.
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
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