The unique high-precision three-dimensional measurement method that can be applied to the disaster prevention is proposed, and its validity is confirmed by experiments in this paper. Concretely, the aim of our research is to detect the sign of land slide. For this aim, the high-precision and wide area measurement are necessary. The conventional methods for the disaster prevention, such as GPS and inclinometer, cannot satisfy these requirements. The measurement of target markers is based on the triangulation, and our unique high-precision method are used. The condition of the experimental study is as follows: the measurement distance between stereo camera and target marker is about 90 m and camera baseline length is 0.95 m. This measurement system can realize maximum error of 10 mm.
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