Reproduction of Riverscape using 2D Map and Laser Scanner Data

Abstract

Laser scanning by airplanes is used as a method of obtaining the detailed altitudes of ground surfaces and buildings. However, this method is not able to obtain the accurate altitudes in the area covered with trees. So, the technique of filtering that predicts real altitudes by removing the heights of trees and buildings, is required. Then, we propose a method, which reproduces a three-dimensional (3D) riverscape by predicting the altitude of river area that is enclosed by trees, by using two-dimensional (2D) map and laser scanner data (LS data). First, river area is extracted from 2D map. Next, laser scanner data that reach the riverbed, are distinguished from LS data. Finally, the proposed method could make it possible to reproduce a 3D riverscape.