- noun a device that uses pulses of laser light to measure the distance between an aircraft and the ground, used to produce many reference points over an area of land and allow the mapping of large areas such as marshes and river networks to which access might be difficult.
- Acronym for light detection and ranging. A system similar to radar, but which utilizes a beam of light, such as infrared, instead of a beam of radio frequency energy, such as microwaves, to obtain measurements of direction, range, altitude, and speed of a scanned object.
- synonym light detection and ranging
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