Definition

Noun: A remote sensing technology that measures distance by illuminating a target with pulsed laser light and measuring the reflected pulses with a sensor. Differences in laser return times and wavelengths are used to create precise, three-dimensional digital representations of the target area. It operates on principles similar to radar but uses light waves instead of radio waves.

Usage

"Lidar" is an uncountable noun referring to the technology or system as a whole. It is often used attributively (like an adjective) to describe systems, data, or surveys.

Examples

• The archaeologists used lidar to map the ancient city hidden beneath the jungle canopy.
• Lidar data revealed previously unknown topographic features of the region.
• The self-driving car's perception system relies heavily on lidar to navigate its environment.
• Scientists are studying atmospheric particles using airborne lidar.

Advanced Usage

• Lidar is a portmanteau of "light" and "radar."
• The term is often used in technical contexts related to geography, geology, archaeology, autonomous vehicles, and atmospheric science.
• It can be part of compound nouns in specialized fields (see Variants).

Variants and Related Words

• Lidar system: The complete hardware and software setup used for lidar sensing.
• Lidar data: The digital information (e.g., point clouds) collected by a lidar system.
• Lidar survey: The act of collecting data over a specific area using lidar technology.
• Airborne lidar: Lidar systems mounted on aircraft or drones.
• Terrestrial lidar: Ground-based lidar systems used for scanning structures or landscapes from a fixed position.

Synonyms

• Laser scanning: A closely related term, though it may refer to a broader category of technologies.
• 3D laser mapping: A descriptive synonym emphasizing the output.

Related Concepts (Not Synonyms)

• Radar: A similar detection system that uses radio waves instead of light.
• Sonar: A detection system that uses sound waves, typically underwater.
• Photogrammetry: A different technique for making measurements from photographs, often used alongside lidar.

Noun

1. a measuring system that detects and locates objects on the same principle as radar but uses light from a laser; a potential technology for detecting air turbulence that can affect aircraft