LIDAR ISA方法來確定範圍（可變距離），通過用激光瞄準對象並測量反射光返回接收器的時間。 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. It has terrestrial, airborne, and mobile applications. Lidar is an acronym of “light detection and ranging” or “laser imaging, detection, and ranging”. Lidar sometimes is called 3-D laser scanning, a special combination of a 3-D scanning and laser scanning. 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. 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.