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LIDAR (Light Detection and Ranging)

LIDAR - Principle

LIDAR (Light Detection And Ranging) is an optical remote sensing technology that measures properties of scattered light to find range and/or other information of a distant target. The prevalent method to determine distance to an object or surface is to use laser pulses. Like the similar radar technology, which uses radio waves, the range to an object is determined by measuring the time delay between transmission of a pulse and detection of the reflected signal.

The acronym LADAR (Laser Detection and Ranging) is often used in military contexts. The term "laser radar" is also in use even though LIDAR does not employ microwaves or radio waves, which is definitional to radar.

LIDAR - Applications

  • Geomatics
  • Archaeology
  • Geography, geology, geomorphology
  • Seismology
  • Forestry
  • Remote sensing and atmospheric physics
  • ALSM (Airborne Laser Swath Mapping)
  • Laser altimetry or LIDAR Contour Mapping
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