|man_made = lighthouse|
|A tower that emits (or emitted) a light signal assisting navigation on sea.|
|Used on these elements|
|Status: De facto|
|Tools for this tag|
The man_made=lighthouse tag is used to identify a or former lighthouse. Operational lighthouses show different colors in different sectors (e.g. white, red, green), so the relative direction of the light to the viewer can be approximated. Some lights are positioned behind each other and, when brought to an alignment act as a leading light. Often, lights incorporate radio transmitters, DGPS, radar and other things too.
How to map
Full mapping consists of at least two OSM objects. The lighthouse object describes the characteristics of the tower as a building; the light object describes the properties of the navigational light.
- Main article: Seamarks/Lights
Operational navigational lights should be mapped as nodes and tagged using seamark:type=* tags. If it's a sector light, every sector is described separately. The individual sectors are numbered. Every sector has a starting and an ending angle. If no angle is defined the light is visible from all directions: its angle is 360°.
Use for the attributes seamark:<object>:<number>:<attribute>=<value>
- seamark:name=* - Name Beacon
- seamark:light:#:category=* - Category Beacon as front, rear, upper, lower
- seamark:light:#:character=* - Rhythm of light
- seamark:light:#:colour=* - Colour of light
- seamark:light:#:height=* - Height in meters
- seamark:light:#:period=* - Period
- seamark:light:#:range =* - Radius in nautical miles, how far the signal can be in nominal terms
- seamark:light:#:radius=* - Radius in nautical miles, as the sector on the map to be displayed
- seamark:light:#:sector_start=* - Beginning of the sector
- seamark:light:#:sector_end=* - End of the sector
'# it can be entered multiple signals that are numbered here. The light sectors are shown graphically on the OpenSeaMap.
If a lighthouse building no longer has a navigational light, add disused=yes to the man_made=lighthouse object. Update any seamark objects or tagging using the approved editors. Be certain not to create ambiguities on any object, as explained below. (Using disused=yes as a simple tag is deprecated. See Key:disused)
Re-purposed and multi-purpose lighthouse buildings
Lighthouses are frequently very substantial buildings, and sometimes are reused for other purposes even if their navigational light is removed. Conversely, it's possible for an operational lighthouse to have other uses to the public beyond assisting navigation.
Be careful not to add new uses of the building to a lighthouse object which is tagged disused=yes. This creates an ambiguity because disused=yes does not state which other tags are no longer relevant. In this case, the new uses should be added as separate nodes or areas as described in One feature, one OSM element.
(Using disused=yes as a simple tag is deprecated. See Key:disused)
- OpenSeaMap displays details of navigational lights in much greater more detail.
Related terms: ‹ beacon › ‹ light house ›