Demarcation of River based on UAV LIDAR Point Cloud Data

Abstract

Delimiting the scope and boundary of river and lake management is the primary work of strengthening river and lake management, and is the precondition of water conservancy administration according to law. The precise scope of management and protection areas is defined for the purpose of regulating all activities within the area and carrying out water conservation activities within the area. The conventional surveying and mapping technology of acquiring terrain data, i.e., Computer Aided Design (CAD) drawing of river construction projects, mapping of 1:2 000 scale image, are not only time-consuming but also inaccurate.The high-resolution 3D point cloud data obtained from Unmanned Aerial Vehicle (UAV) lidar can identify the baseline lines of river management demarcation, i.e.,ank toe line, dike toe line, bank revetment top line, bank slope line, etc. Through spatial analysis and manual visual interpretation, the boundary of river management area can be accurately demarcated.The accuracy of the baseline lines of river management demarcation drawn by ARCGIS depends on the resolution of 3D point cloud data, the environment of the river and the deviation of manual visual interpretation.