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It is read off the azimuth scale, possibly magnified with a so-called microscope. say, 32 degrees, ll minutes. finer degrees of reading-out are possible with some types. This type of theodolite operation is not too different in principle than taking bearings on objects with a magnetic compass, and reading off the direction in degrees.

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Q: How do you measure a horizontal angle by a theodolites?
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Related questions

What are the permanent adjustments of a theodolite?

Most theodolites have no "permanent" adjustments, since they are used to measure angles, both horizontal and vertical.


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A horizontal angle is an angle between lines on a horizontal plane.


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Slope is the angle compared with the horizontal, where the horizontal is 90° to the vertical, which can be measured with a plumb line. So, put a weight on a string, measure the angle of the string to the angle you are measuring, subtract 90° and that will give you the slope.


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20 degrees is a measure of angular displacement. This cannot be converted to lateral (horizontal) displacement.


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For certain angles, the answer is yes. For 30o to the horizontal (in the positive x direction), you need to measure the horizontal distance to be twice the vertical distance. For example, draw a triangle with a base length of 10cm and, at a right angle to the base, measure a height of 5cm. The angle to the horizontal (the smaller angle) will be 30o. (The opposite is true for the angle of 60o).


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