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The vernier scale on a theodolite is used to measure angles precisely and accurately. To read it, first find the main graduation line that corresponds with the two lines of the vernier scale. This line will represent the value of the angle. Next, count the number of lines that the vernier scale is oRead more
The vernier scale on a theodolite is used to measure angles precisely and accurately. To read it, first find the main graduation line that corresponds with the two lines of the vernier scale. This line will represent the value of the angle.
Next, count the number of lines that the vernier scale is offset from the main graduation. Finally, multiply this value by the least count of the scale to get the exact angle measurement.
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