Documentation: Mapping guidelines for wind power plants

[flacombe]

We need a page on the wiki to describe how wind power plants can/should be mapped.
The page should be written under https://wiki.openstreetmap.org/wiki/Power_generation

We can get inspired by https://wiki.openstreetmap.org/wiki/Power_generation/Hydropower

[marina-petkova]

Wiki page currently in progress here : https://wiki.openstreetmap.org/wiki/Power_generation/Guidelines/Wind_farms