Application of Long Range Airborne LiDAR in Mapping High-density Vegetation Terrain in Mountainous Areas

Abstract

In the field of surveying and mapping, the accurate measurement of dense vegetation in mountainous areas is always a challenge. First of all, the use of conventional GNSS technology and total station operation, it is faced with more labor and resource investment, heavy economic burden, high safety risk and long operation cycle drawbacks. Secondly, the use of satellite remote sensing images and UAV aerial photography technology, due to the cover of surface vegetation, often can not clearly capture the surface condition covered by dense vegetation, and it is difficult to ensure the accuracy of measurement results. With the continuous development of LiDAR technology, airborne LiDAR measurement technology has gradually become a mature measurement means, combined with point cloud data processing, optimize the point cloud classification algorithm, can maximize the accuracy of height measurement in dense vegetation areas. Therefore, the use of airborne LiDAR to obtain the elevation data of the measuring area is a more ideal measurement method. The long range and multi-echo airborne LiDARis used to obtain terrain data with point cloud density of 21 points /m2, which solves the problem of terrain mapping under such terrain conditions.