Application of FARO Focus 3D S350 Terrestrial Laser Scanner in Building 3D Models of Potential Areas of Landslides and Rocks—Case Study in Ha Giang Province, Vietnam

Morphology and topographic factors are closely related to soil and rock characteristics, tectonic activities, and endogenous and exogenous processes such as flash floods, landslides, and rocks. The aim of this paper is to present the application possibility of the FARO Focus 3D S350 Terrestrial Laser Scanner (TLS) in building 3D models in the potential case study of landslides and rocks—the Na Chi commune, Xin Man district, Ha Giang province. The FARO Focus 3D S350 TLS uses the phase-shift technology to determine the distance, the measuring range of 350 m, the measurement speed of up to 976,000 points/second, and the accuracy of ± 2 mm. The results show that the FARO Focus 3D S350 TLS fully meets the accuracy and is highly applicable for building the 3D point-cloud models in the landslide and rock areas. This research will be useful to local managers as well as geologists.