An Improved LOS Method for Implementing Visibility Analysis of 3D Complex Landscapes

This paper presents an efficient method for implementing visibility analysis on complex landscapes based on an improved LOS (line of sight) algorithm. The method not only determines the viewshed through capturing the geometric relationship between the target points and viewpoint. It also judges the visibility of the target points by the elevations. The visibility of a part of the target points are determined through comparing the pointspsila elevations with the viewpointpsilas height, thus enhance the efficiency of visibility analysis on the terrain. Eventually visualize the results related to the given viewpoint on three-dimensional terrain surfaces. This method can not only be applied in the visibility analysis of the forest scenes, can also be used in the analysis of the urban environment. Experiments show that our method is superior to the traditional related methods.