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Public-images-osm logo.svg building = transformer_tower
A small but tall building constructed to comprise a transformer and connect to an overhead power line. Show/edit corresponding data item.
Rendering in OSM Carto
Area building=yes.png
Group: buildings
Used on these elements
may be used on nodesshould not be used on waysmay be used on areas (and multipolygon relations)should not be used on relations (except multipolygon relations)
Useful combination
Status: de facto

The tag building=transformer_tower represents a tall building specially designed to connect to an overhead medium voltage power line (power=minor_line) and to house a small substation with a distribution transformer. Often, the power line has been dismantled and replaced by an underground cable. However, the building may still be in use as a substation.

How to map

Map the building and add the tag building=transformer_tower.

If the building is still in use as a substation then it should also get the following tags:

Other optional tags:

  • operator=* (the name of the power company)
  • ref=*, name=* (any reference number or name the power company may use to refer to this substation)


See also

  • power=substation Tagging of substation properties and substation components like transformers.