The gyro theodolite is composed of a gyroscope, a theodolite and a tripod. It is a combination of a gyroscope and a theodolite that is used to determine the true north azimuth (through any point on the ground, the direction to the north pole is called true north. Its direction line It is called the true north direction line or the true meridian. The topographic map on the topographic map is the true meridian. The instrument is measured clockwise from the north end of the true meridian and the horizontal angle of a straight line is called the true azimuth (A).)
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