https://www.siliconvalley.com/2022/09/02/pge-uses-helicopter-technology-to-analyze-power-line-environments/

In recent weeks, Vacaville residents might have seen helicopters flying low around power lines.

The reason? Pacific Gas & Electric is using copters equipped with Light Detection and Ranging (LiDAR) technology to assess the surrounding conditions of power lines to determine if vegetation needs to be cut back.