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Public-images-osm logo.svg usage = transmission
Osm element tag.svg
Features involved in long distance carriage of fluids or goods and connecting to more specific and local usage networks. It excludes vehicle carriage, referring to transportation. Edit or translate this description.
Group: Railways
Used on these elements
should not be used on nodesmay be used on waysshould not be used on areasshould not be used on relations
Useful combination
Status: approvedPage for proposal


Transmission paths lead fluids or goods from production (or intake) sites to storage or consumption places for further multiple usages or processing. Point here is to map large infrastructure moving important amounts on long distances. This could be compared to transmission power grids versus distribution smaller grids.
At this stage of network architecture, fluids or goods aren't dedicated to a particular usage and that's what usage=transmission is intended for. Domestic use, irrigation or further processing may apply on smaller connecting networks in repartition facilities located on edges of both transmission and specific use networks.

The path is intended for transmission, and this value excludes car, truck or boat carriage. See usage=transportation for a more appropriate value.

How to map

As this value may apply to a wide range of different activities, including artificial Waterways and Power networks, pleaser refer to each domain pages for a more detailed tagging overview.

Draw a line on the network edge (which can be a river, a powerline, a pipeline, whatever) and put usage=transmission on it.



Photo Tagging Note
Two types of transmission waterways


A free flow waterway in a tunnel allowing water to go under a hill.


As it's not for power production, the tunnel taking out water of a lake is a transmission way.