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- Lidar is a remote sensing technology that uses laser light to measure distances and create 3D representations of objects and landscapes123. Lidar data is collected from aircraft using sensors that detect the reflections of a pulsed laser beam1. The reflections are recorded as millions of individual points, collectively called a “point cloud,” that represent the 3D positions of objects on the surface including buildings, vegetation, and the ground1. Lidar can be used to estimate the heights of objects on the ground2. There are two kinds of lidar detection schemes: "incoherent" or direct energy detection and coherent detection4.Learn more:✕This summary was generated using AI based on multiple online sources. To view the original source information, use the "Learn more" links.Light detection and ranging (lidar) data are collected from aircraft using sensors that detect the reflections of a pulsed laser beam. The reflections are recorded as millions of individual points, collectively called a “point cloud,” that represent the 3D positions of objects on the surface including buildings, vegetation, and the ground.www.usgs.gov/faqs/what-lidar-data-and-where-ca…A LiDAR system uses a laser, a GPS and an IMU to estimate the heights of objects on the ground. Discrete LiDAR data are generated from waveforms -- each point represent peak energy points along the returned energy. Discrete LiDAR points contain an x, y and z value. The z value is what is used to generate height.www.neonscience.org/resources/learning-hub/tutor…The findings were the result of an aerial survey that researchers conducted via airplane using lidar (light detection and ranging), in which lasers are beamed out and the reflected light is used to create aerial imagery of a landscape.www.livescience.com/lidar-maya-civilization-guate…The two kinds of lidar detection schemes are "incoherent" or direct energy detection (which principally measures amplitude changes of the reflected light) and coherent detection (best for measuring Doppler shifts, or changes in the phase of the reflected light).en.wikipedia.org/wiki/Lidar
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