
Lidar
Method of spatial measurement using laser

Method of spatial measurement using laser
Lidar (, an acronym of light detection and ranging or laser imaging, detection, and ranging, often stylized LiDAR) is a method for determining ranges by targeting an object or a surface with a laser and measuring the time for the reflected light to return to the optical receiver. Lidar may operate in a fixed direction (e.g., vertical) or it may scan directions, in a special combination of 3D scanning and laser scanning. LiDAR is used within terrestrial, airborne, and mobile equipment around the globe. It is commonly used to make high-resolution maps, with uses in surveying, geodesy, geomatics, archaeology, geography, geology, geomorphology, seismology, forestry, atmospheric physics, laser guidance, airborne laser swathe mapping (ALSM), and laser altimetry. It is used to make digital 3D representations of areas on the Earth's surface and ocean bottom of the intertidal and near coastal zone by varying the wavelength of light. It has also been increasingly used in control and navigation for...
Read on Wikipedia · Image U.S. National Park Service, U.S. Geological Survey, Public domain
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