The technology is also used in control and navigation for some autonomous cars and for the helicopter Ingenuity on its record-setting flights over the terrain of Mars. Lidar is commonly used to make high-resolution maps, with applications in surveying, geodesy, geomatics, archaeology, geography, geology, geomorphology, seismology, forestry, atmospheric physics, laser guidance, airborne laser swath mapping (ALSM), and laser altimetry.
Lidar sometimes is called 3-D laser scanning, a special combination of 3-D scanning and laser scanning. Lidar is an acronym of "light detection and ranging" or "laser imaging, detection, and ranging". It has terrestrial, airborne, and mobile applications. Lidar can also be used to make digital 3-D representations of areas on the earth's surface and ocean bottom, due to differences in laser return times, and by varying laser wavelengths. Lidar ( / ˈ l aɪ d ɑːr/, also LIDAR, or LiDAR sometimes LADAR) is a method for determining ranges (variable distance) by targeting an object with a laser and measuring the time for the reflected light to return to the receiver. Vegetation heights are depicted in shades of green, where dark greens are closest to the ground and light greens are the highest. For ground-level features, colors range from deep brown to tan.
This visualization shows an airplane collecting a 50-kilometer swath of lidar data over the Brazilian rainforest.
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