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Public-images-osm logo.svg historic = optical_telegraph
Semaphore system Edit or translate this description.
Group: Historic
Used on these elements
may be used on nodesshould not be used on waysmay be used on areasshould not be used on relations
Useful combination
Status: in use

A semaphore telegraph is a system of conveying information by means of visual signals, using towers with pivoting shutters (a.k.a. blades or paddles).

For example, the Prussian semaphore system was a telegraphic communications system used between Berlin and the Rhine Province from 1832 to 1849. It could transmit administrative and military messages by optical signal over a distance of nearly 550 kilometres (340 mi). The telegraph line comprised 62 stations each furnished with a signal mast with six cable-operated arms.

According to wikipedia, among the countries that have this feature are France, Sweden, United Kingdom, Prussia, Portugal, Spain, Danemark, Russia, United States, Canada, Egypt, India

How to map

Place a node node at the centre point, or draw an area area around the outline of the construction.

Tags to use in combination

For razed optical telegraph use instead:


  • Geschichtskarte Optical telegraph.png

See also