The authors disscussed here the pattern of the surface movements of the Yatsugawa Landslide in Tochio city, Niigata Prefecture based upon a series of triangulations which had been carried on five times from May '67 to November '69 purposed evaluation of measurements by photogrammetric method.
The pattern of surface movement of the landslide mass during the period are tabulated on Table 1 and illustrated on Figure 2.
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