This technology is the three-dimensional survey system using photogrammetry technique and visible light communication technology, The LED light sources are placed at a position to be measured and stereo-photographed by digital cameras installed in two places. In addition, the relation of same lights in different viewpoints can be automatically done by extracting unique blinking patterns of each light. Experimental results show that this system can provide enough accuracy for construction survey. By using this system, many points can be measured at once, in a short time and in better accurate. For this reason, it can be expected surveyor-saving, suppression of aerial work and improvement of surveying accuracy. In addition, it makes possible to measure three-dimensional coordinates of many points automatically and repeatedly. This system has already been used several bridge construction projects and aluminum dome tank. In this paper, the summary of some projects applied this system are presented.
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