HiWATER: Airborne LiDAR-DEM data production in Tianlaochi catchment

On 25 July 2012, a Leica ALS70 airborne laser scanner boarded on the Y-12 aircraft was used to obtain the point cloud data. Leica ALS70 airborne laser scanner has unlimited numbers of returns intensities measurements including the first, second, third return intensities. The wavelength of laser light is 1064 nm. The absolute flight altitude is 4800 m with the point cloud density 1 points per square meter. Aerial LiDAR-DEM was obtained through parameter calibration, automatic classification of point cloud density and manual editing.

2012年7月25日，搭载于Y-12飞机上的莱卡ALS70机载激光扫描仪被用于获取点云数据。莱卡ALS70机载激光扫描仪能够提供无限次的回波强度测量，包括首次、第二次和第三次回波的强度。激光光波的波长为1064纳米。绝对飞行高度为4800米，点云密度为每平方米1个点。通过参数校准、点云密度自动分类及人工编辑，获得了航空激光雷达数字高程模型。