Surveying
The slotted template method

All listed here
Is suitable for large areas with less control
Is prepared, by graphical method
Is rapid and accurate

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Surveying
Refraction correction

partially eliminates curvature correction
adds to the curvature correction
has no effect on curvature correction
completely eliminates curvature correction

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Surveying
In the prismatic compass

the magnetic needle moves with the box
the line of the sight does not move with the box
the graduated circle is fixed to the box and the magnetic needle always remains in the N-S direction
the magnetic needle and graduated circle do not move with the box

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