Landslide Monitoring by Photogrammetry In Mongset Area, Northwestern Vietnam
Atsushi Kajiyama
Department of Geosciences, Graduate School of Science, Osaka City University
Muneki Mitamura
Department of Geosciences, Graduate School of Science, Osaka City University
Truong Xuan Luan
Hanoi University of Mining and Geology
Takamoto Okudaira
Department of Geosciences, Graduate School of Science, Osaka City University
Nhu Viet Ha
Hanoi University of Mining and Geology
要旨
Stereo-photogrammetry techniques have been applied for monitoring landslide conditions in the MongSet area, northwestern Vietnam during 2002 to 2003. This technique afforded surface deformation mapping of the landslide with a high spatial resolution and accuracy. Photomodeler software was used for this purpose. Photographs taken with an ordinary digital camera were analyzed using reference points. The technique applied has helped to estimate the movement of the landslide for one year. The promising results were validated by comparing independent measurements carried out by a laser telemeter that thus established the validity of the technique.
