Tag:man_made=lighthouse
 man_made = lighthouse
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| Description |
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Tower that emits light to serve as a navigational aid at sea or on inland waterway 
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| Rendering in OSM Carto |
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| Group: man made |
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| Useful combination |
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| See also |
Status: de facto
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| Tools for this tag |
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The man_made=lighthouse tag is used to identify a 
lighthouse or former lighthouse. Although the tower structure is very common, a lighthouse building can be any shape. The common factor is that these buildings have a lamp room at the top (if they can't house people, they're likely just seamark:type=light_minor/light_major). Many lighthouses are no longer operational, so there may not be any form of light in the lamp room.
Operational lighthouses show different colours 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.
Note that there are some small navigation aids that emit light that are not lighthouses but beacons (man_made=beacon).
How to map
Full mapping may consist of one or 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.
Building properties
Draw an area along the outline and tag it with man_made=lighthouse
Following tags also may be useful:
- height=*
- access=*
- wikipedia=*
- historic=yes
- ref=*
- name=*
- tourism=attraction
- tourism=viewpoint
- building=lighthouse
If mapping as areas in not feasible, map building as a node.
- Main article: Seamarks/Lights
Operational navigational lights should be mapped as node and tagged using seamark:type=* tags (except rare situations lighthouses are seamark:type=light_major). 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:type=light_major
- seamark:light:1:category=* - Category Beacon as front, rear, upper, lower
- seamark:light:1:character=* - Rhythm of light
- seamark:light:1:colour=* - Colour of light
- seamark:light:1:height=* - Height in meters
- seamark:light:1:period=* - Period
- seamark:light:1:sequence=* - Sequence
- seamark:light:1:range=* - Radius in nautical miles, how far the signal can be in nominal terms
- seamark:light:1:sector_start=* - Beginning of the sector
- seamark:light:1:sector_end=* - End of the sector
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.
Tags such as tourism=viewpoint, tourism=museum, amenity=restaurant etc. may be added to the lighthouse object, or as separate nodes or areas inside it or nearby as appropriate.
Rendering
- OSM Carto:
- OpenSeaMap displays details of navigational lights in much greater more detail.
Example
| Photo | Tags | OSM Carto | OpenSeaMap |
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man_made=lighthouse name=Westerheversand Building: 87534169  87534169Light: 1469613919  1469613919
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OpenSeaMap |
See also
- Marine navigation
- Seamarks/Lights
- Seamarks/Landmarks
- Seamarks/Seamark Tag Values
- aeroway=navigationaid - for tagging plane navigation lights
External links
- Official lists of lights
- Amateur lists of lights
- IHO S-57 catalog
- IHO-S-57