Illinois River, Marseilles Pool 0.5m Contour

LiDAR data is remotely sensed high-resolution elevation data collected by an airborne collection platform. Using a combination of laser rangefinding, GPS positioning and inertial measurement technologies; LiDAR instruments are able to make highly detailed Digital Elevation Models (DEMs) of the earth's terrain, man-made structures and vegetation.

激光雷达（LiDAR）数据是由机载采集平台获取的遥感高分辨率高程数据。通过融合激光测距、全球定位系统（GPS）与惯性测量技术，激光雷达仪器能够生成覆盖地球地形、人造构筑物及植被的高细节数字高程模型（Digital Elevation Models，简称DEMs）。