# [Tagging] power=* tag: minor_line vs. line

Bryan Housel bryan at 7thposition.com
Tue Oct 13 14:16:55 UTC 2015

```A simper way to describe this would be to say that:

`power=line` is for “transmission”
https://en.wikipedia.org/wiki/Electric_power_transmission <https://en.wikipedia.org/wiki/Electric_power_transmission>

`power=minor_line` is for “distribution”
https://en.wikipedia.org/wiki/Electric_power_distribution <https://en.wikipedia.org/wiki/Electric_power_distribution>

Trying to define this based on line voltage or tower heights or danger to aircraft is silly.  Transmission and distribution lines can be located underground.

> On Oct 13, 2015, at 4:22 AM, David Marchal <penegal at live.fr> wrote:
>
> Hello, there.
>
> I saw conflicting points of view regarding the difference between these two ways for modelling aerial power lines: some say that it is the voltage which matters, others say that it's the visibility difference that matters, others say that it's the danger for planes that matters, and some use other reasons or some of these together. The wiki doesn't help much: http://wiki.openstreetmap.org/wiki/Tag:power%3Dminor_line <http://wiki.openstreetmap.org/wiki/Tag:power%3Dminor_line> seems to primarily use the height of the line supports, with a lose usage of voltage, but http://wiki.openstreetmap.org/wiki/WikiProject_Power_networks/France <http://wiki.openstreetmap.org/wiki/WikiProject_Power_networks/France> says that any aerial line is to me mapped as power=line; meanwhile, https://help.openstreetmap.org/questions/45781/power-lines-minor_line-threshold <https://help.openstreetmap.org/questions/45781/power-lines-minor_line-threshold> refers to both the landscape and the danger for pilots of planes and helicopters. I'm inclined to use the general landscape visibility of the line to map it, as it seems to be the reason of the difference of rendering between them, which means that lines on poles and small tower would be power=minor_line, and lines on taller towers would be power=line, but I would like to have a confirmation on that, as it doesn't seem to be clear anywhere. If I'm able to collect enough opinions to meet a consensus, I'll try to update the different sources, mainly the wiki, accordingly, precising that the matter was discussed here and reached a consensus.
>