Tag:man_made=groyne
 man_made = groyne
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A rigid structure built from a shoreline or riverbank that interrupts water flow and limits the movement of sediment. 
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Rendering in OSM Carto 
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Rendering in OSM Carto 
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| Group: man made |
| Used on these elements |
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| Status: de facto |
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Use the man_made=groyne tag to mark a groyne (spelled groin in American English), which is a rigid structure stretching out a short distance from the shoreline or riverbank for the purpose of reducing the movement of sediment (eg sand and gravel) or sometimes to reduce ice-jamming.
Not to be confused with man_made=breakwater, which is used for structures designed primarily to create an area of calm water for mooring boats, or with man_made=pier, which is used for structures on which people walk over water to access boats or similar.
Another name for this structure is wing dam.
How to map
Create a linear way along the length of the groyne. Tag with man_made=groyne.
Alternatively, create a sequence of linked ways with one or more additional tags on each section. For example:
- submerged=yes - for the parts always submerged.
- tidal=yes - for the parts submerged on high tide and above water on low tide.
- height=* - height over seabed.
Very wide groynes (such as way 373881874) can be mapped as areas by adding man_made=groyne and area=yes.
Examples
Gallery
Groyne under water
Groyne at the beach
Stone groyne
Groyne in the tidelands
Locations
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