OpenStreetMap
Powerline http://www.openstreetmap.org/browse/way/5194902 near Celilo, Oregon, USA
Obelixx 于 2012年二月 1日 以 German (Deutsch) 发布What is the exact function, name and designation of the powerline osm.org/browse/way/5194902 near Celilo, Oregon, USA?
I believe, it is an experimental DC powerline. Who knows more?
讨论
Sundance 于 2012年02月 1日 21:32 的评论
Not sure but there is some information here about the Celilo power station
http://en.wikipedia.org/wiki/Celilo_Converter_Station