The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences. Vol. XXXVII. Part Bl. Beijing 2008 
of the goals, the angle of laser beam and the power of 
system and so on. The reflectivity is affected severely by 
the difference of the rock type, the ground soil texture and 
ground cover. Therefore, it is necessary to choose 
appropriate season and carries on the full investigation to 
the soil texture type. The penetrability of laser light is 
mainly restricted by ground cover and the intensity of 
laser beam. If the region of the monitoring landslide is not 
crowded by the massive low vegetations, the influence of 
the penetration coefficient is not big. If the ground 
includes the massive low vegetation, we should process 
the point cloud first. 
(4) The laser scanning cannot instead of the observation 
completely, because the 3D point cloud could not 
describe the characteristics of the rock intensity, the soil 
texture type, the water content and the corrosion. In order 
to analyze the relations of the landslide with the factors of 
other types, the field investigation is necessary. But it is 
still the best method to monitor the landslide in a 
dangerous region. 
In brief, the 3D laser scanner is easily hand carried and 
deployed by a single operator. In addition, it can obtain the 
point cloud of the monitoring region fast and effectively. The 
test result is satisfying. It has the infinite potential in various 
distortion monitoring. 
REFERENCES 
References from Journals: 
Kayen, Robert, Bays: Ground-LIDAR visualization of surface 
and structural deformations of the Niigata-ken Chuetse[J]. 
Earthquake Spectra, 2005(22): 147-162 
References from Books: 
Strouth, A. & Eberhardt, E. (2006). The use of LiDAR to 
overcome rock slope hazard data collection challenges at 
Afternoon Creek, Washington. In 41st U.S. Symposium on 
Rock Mechanics: 50 Years of Rock Mechanics - Landmarks 
and Future Challenges, Golden. American Rock Mechanics 
Association 
References from Other Literature: 
Collins B.D. Sitar N.: Application of high resolution 3D laser 
scanning to slop stability studies [C]. 39 th Symposium on 
Engineering Geology and Geotechnical Engineering. 
Butte:Montana, 2004 
References from websites: 
ILRIS-3D—one tool, multiple uses: mine safety, volume 
calculation, change detection, Optech Incorporated. 
Innov Metric Software: PolyWorks Inspector™ V8.0, 
Inspector’s Guide, August 2003 
Optech, “ILRIS-3D Benefits and Features”, 
http://www.optech.on.ca/ilrisfeatbens.htm. accessed June 2004. 
Terrasolid, TerraScan User’s Guide , Arttu Soininen , 
Terrasolid, 1998-2004