رصد طبوغرافية قاع القطاع الجنوبى من نهر بينان فى تايوان بإستخدام تقنية الليدار

Lidar technique is one of the modern and accurate technologies that is used to produce point cloud of the feature to be studied using Laser Pulses , which is an abbreviation for the term Light Detection and Ranging and it is considered one of the most important techniques of Active Remote Sensing and it works on Tracking and monitoring the target and determining the distance at which the target is located ,and when determining the density of the points to be monitored, the time of the scanning process is determined , as the higher the density of the Points the longer the scanning process takes, but in the end you get a point cloud for each point with an X ,Y,Z and ultimately produces a three-dimensional and True View monitoring of the area of study, and it is considered one of the most accurate surveying methods. This technology, known as bathymetric Lidar, studies the topography of river beds. The laser pulses penetrate the river water all the way to the bottom and then return, allowing the sensor to receive and determine the coordinates of each point. This process creates an accurate point cloud with known coordinates. Using specialized point cloud programs, you can create a 3D model and true view with an accuracy of up to half a centimeter (5 millimeters). The scientific community considers the study of river depth topography to be one of the most important studies, given the vital importance of rivers to countries. It is crucial to draw a detailed topographic section of the riverbed, produce a map of the riverbed with high accuracy and cartographic analysis, measure the river's slope and its direction, create three-dimensional models of the river, reveal the terrain of the bottom and its ruggedness, and track the traces sunken in the bottom.