Tag:power=tower
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+/- power=tower
For towers or pylons carrying high voltage electricity cables. Normally constructed from steel latticework.
Undefined Tools for this tag
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For towers or pylons carrying high voltage electricity cables. Normally constructed from steel latticework.
Should not be used for electricity or telephone cables carried on single wooden poles. There is power=pole for power poles.
Contents |
How to Map
Add a node at the centre of the tower and add the power=tower tag.
You can add a ref=* as well if the tower has this.
Detailed tower tagging
You can add additional information about the tower using the following tagging scheme.
General properties
| Key | Value | Description |
|---|---|---|
| structure | lattice, tubular, solid |
This tag describes the construction type of a tower. The default value is lattice. |
| material | steel, wood, concrete, ... |
The default value is steel but for "solid" towers the material should be defined (normally wood or concrete). |
| height | * | The height in meter of the tower if known. |
| colour | * | The colour(s) of a painted tower, e.g. colour=red/white for tower painted red and white to improve visibility to air traffic. |
Tower design
This tag describes the design of the tower. The main parameters are the number and positions of cross-arms (the horisontal beams on which the insulators are attached). Cross-arms which only serve as support for earth wires should not be considered. See examples with suggested values below.
| Picture | Key | Value | Description |
|---|---|---|---|
 |
design | one-level | A tower having cross-arms at a single level only. |
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design | two-level | A tower having cross-arms at two levels. |
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design | donau | A common sub-type of the two-level tower. It is characterized by having one conductor on each side at the upper level and two conductors at each side on the lower level. The "Donaumast" is widely used in central Europe. |
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design | three-level | A tower having cross-arms at three levels. |
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design | barrel | A common sub-type of the three-level tower. It is characterized by the middle level cross-arms being longer than the upper and lower cross-arms giving the conductor arrangement a barrel-like shape. |
 |
design | asymmetric | A two- or three-level single circuit tower carrying two conductors at one side and the third conductor at the other side. |
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design | donau;one-level | A three-level combination tower effectively being a Donau tower having an additional lower level, often used for circuits of a lower voltage than those at the upper levels. This tag better describes the design than just using "three-level". Similar tag values may be used for other designs having an additional lower level. |
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design | four-level, six-level, nine-level, ... |
A tower having cross-arms at four or more levels. These tall towers may carry four or more circuits. |
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design | delta | A y-shaped tower having a horisontal cross-beam between the two top structures. All conductors are attached to the cross-beam. It is mostly used for a single circuit. |
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design | delta_two-level | Delta tower having two cross-beams. Suitable for three circuits. |
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design | y-frame | Similar to delta tower but there is no horisontal cross-beam between the two top structures (cross-beams at the joint or further down is possible). The middle conductor is supported directly by the top structures. |
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design | h-frame, h-frame_one-level |
A tower type having two (or more) separate pylons or poles connected by a beam to which the conductors are attached. The cross-beam extends beyond the vertical structures such that not all conductors are located between the vertical structures. The portal tower is mostly used for a single circuit. Use h-frame_two-level and h-frame_three-level for designs having cross-beams at two or three levels. |
 |
design | portal, portal_one-level |
A tower type having two (or more) vertical structures connected by a horisontal cross-beam. All conductors are supported between the vertical structures (unlike the h-frame tower). This design is mostly used as termination tower at substations. |
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design | portal_two-level, portal_three-level |
Two and three level versions of the portal tower. |
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design | guyed_v-frame | A guyed tower type that is mainly used for ultra-high voltage lines e.g. in North America. |
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design | bipole | A pair of closely spaced but non-touching pylons. The conductors are typically mounted between the pylons. There are no cross-arms. Known as 'Wintrack' in the Netherlands. The bipole should be mapped as a single tower. |
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design | monopolar | A tower carrying just one conductor. Mostly used as an anchor tower at very high voltage. |
| design:name | * | When the tower design has been given a specific name by its designer it can be indicated by this tag, e.g. Wintrack (The Netherlands), Eagle (Denmark). | |
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design:incomplete | yes | An incomplete tower carries less conductors than the design is capable of. Sometimes the unused cross-arms are omitted (but can be retrofitted if an extra circuit is to be mounted) |
Tower type
This tag describes the functional type or role of the transmission tower, such as anchor tower. Please note that the tower:type=* tag has other meanings when used in combination with man_made=tower.
| Picture | Key | Value | Description |
|---|---|---|---|
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tower:type | suspension | A tower which supports the conductors vertically using suspension insulators. This is the default type and need not be tagged. However it may be useful to tag a suspension tower if it is used as an angle tower (an anchor tower would normally be expected here) |
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tower:type | anchor | A tower where conductor sections terminate at strain insulators, normally built stronger than normal suspension towers. Used e.g. as angle tower when the line changes direction. |
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tower:type | termination | A tower with strain insulators used at the end of a line, e.g. before a substation or at the transition to an underground cable (combine with tower=air_to_ground). Sometimes referred to as dead-end tower. Can resist the full single-sided tension of the conductors. |
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tower:type | branch | A line branch starts at this tower. If the branch line is a cable then add tower=air_to_ground. |
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tower:type | transposing | A tower in which the conductors exchange positions in order to balance the capacitance and impedance of the conductors. |
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tower:type | crossing | A special tower used at river crossings etc where a very long span is required. These towers may be very tall and are therefore significant landmarks. |
Examples
| Picture/Description | Tags | Mapnik | Osmarender |
|---|---|---|---|
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power=tower ref=PXA 5 |
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power=tower design=barrel tower:type=crossing height=227 colour=red/white |
See Power lines in Bremen for a reference.
Related terms: <power tower>
