Analysis Of Characteristics Of Landslide Deformation Using 3D Laser Scanning Technique

Landslide disaster in our country have characteristics as follows: widely distributed,frequently occurrenced and seriousiy damaged.The Southwestern,Northwestern and South Regional have been become the worst hit areas in China.It not only damaged people's lives and property,but also affected the local production,living and economic development to some extent.Three dimensional laser scanning technology is a new technology of Surveying and mapping.Its basic idea is use discrete sampling points as the basis of the geometric model to express the details of complex surface information.When analyzing the overall deformation law of landslide surface,it is necessary to make a quantitative analysis of the map and data which created by points cloud.In this paper,the spatial analysis function of GIS technology is used to analyze the slope,slope direction,terrain profile,terrain contour and so on.First,the deformation characteristics analysis of landslide surface based on irregular triangular network TIN.Using the triangulated irregular network TIN surface data and raster data maked by Arc GIS to judge whether the designated area happened erosion or deposition.Using Arc GIS to analyze the slope and exposure use two kinds of models,which are grid surface and TIN surface.Using PolyWorks to generate contour lines based on the triangle surface.Constituency based on the triangle surface,which indicates that the surface topography of the landslide is larger.In order to solve the problem of directly using point cloud data of deformation characteristics of the landslide surface analysis of poor accuracy,in this paper the chromatographic analysis of point cloud based on the principle of differential comparison(model),and in the Arcgis draw histogram comparison of landslide deformation quantitatively.It can not only comprehensively and intuitively analyze the overall deformation of the slope,but also can accurately and quantitatively analyze the deformation of the slope.According to the position corresponding to the color of the position deviation,the slope deformation is analyzed quantitatively and accurately.It is of great significance to explore the application method and theory of 3D laser scanning technology in slope monitoring.