This video shows how Lidar systems work in general, to measure trees, building, etc. and how they are used with other vehicles including aeroplanes and ships:
Other Lidar related articles:
Lidar Lite - Laser based Sensor
Quanergy\'s $250 Solid-State LiDAR - Self-Driving to the Masses?
Magna teams with Innoviz LiDAR for Autonomous driving system
LIDAR - in Glossary