Tag:man_made=mast
 man_made = mast
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A mast is a vertical structure built to hold, for example, antennas. 
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| Rendering in OSM Carto |
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| Group: Man made |
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| Status: de facto |
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A man_made=mast is usually a small, narrow mast. It is often built from concrete or steel and only for a single application like a mobile phone base station.
Unlike a man_made=tower which is accessible and provides platforms, a man_made=mast only offers ladder steps to climb it on the outside. (Think medieval castle tower vs. ship mast) Often masts are built to hold antennas. High masts may be fastened to ground with guy wires.
Guys can be fixed with insulators to the mast and divided by insulators, if the mast is insulated to ground.
How to map
Set a node 
at the centre of the mast. Add the tag man_made=mast.
Engineering definition
In structural engineering, mast is a vertical structure, supported by external guys and anchors. This is the only existing definite feature that could be used to differentiate masts and towers.
Tags to use in combination
- tower:type=communication - transmission tower
- tower:type=lighting
- tower:type=siren
- tower:type=monitoring
- height=* - height in meters
- tower:construction=*
- operator=*
Examples
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Mobile phone |
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Police radio |
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Microwave link(s) |
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Light tower |
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Popinjay mast |
Rendering
- mast in general
+ tower:type=communication
+ tower:type=lighting
Röntgen icons
| tower:type=* | |||||
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| tower:construction=freestanding | 
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| tower:construction=lattice | 
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| tower:construction=guyed_tube | 
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| tower:construction=guyed_lattice | 
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Additional icons
Additional icon for communication:mobile_phone=yes is 
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JOSM preset
- Internal presets :
- Man made / power / power tower
- Man made / towers
- External preset preferences / tagging presets:
Possible tagging error
See also
- man_made=tower - a tower is free-standing vertical structure, which is higher than it is wide.
- man_made=flagpole - pole to hold a flag
- man_made=antenna - used for some kind of antenna
- power=tower - for towers or pylons carrying high voltage electricity cables. Normally constructed from steel latticework.
- power=pole - pole for overhead power lines
- power=catenary_mast - catenary mast supports system of overhead wires
- tower:type=* - describes the type of tower, mast, or power-tower
- Proposed type=node relation can be used to map things attached to a mast.