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LiDAR (Light Detection And Ranging), also referred to as laser-radar, is a rapidly maturing remote-sensing and survey technology that has spaceborne, airborne, and ground-based sensor platforms, each chosen depending on the resolution and application of data required. LiDAR differs from many passive remotesensing technologies, such as aerial photography, because it “actively” illuminates the earth's surface (or ocean floor) by emission and reception of laser light pulses. Like other remote sensing technologies, LiDAR is an important source of data for GIS.

Technical Aspects

LiDAR systems are operated in either scanning or profiling mode. Profiling-mode LiDAR sensors emit laser pulses in a single direction, while scanning mode systems sweep laser pulses from side to side as they exit the sensor. Scanning LiDAR systems, when placed on an airborne platform ...

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