Burial mounds

New Tech Used to Literally Throw New Light On Tongan Ruins

LiDAR, which is seeing increased use as an archaeological surveying technique, works by firing laser light at a geographical region from the air. Mounted on the underside of an aircraft, LiDAR has the ability to measure distance according to how much, and how quickly, that beam of laser light bounces off the ground and returns; as a result, land formations that would otherwise be occluded by thick vegetation are revealed.