Surveying
The latitude of the observer's position, is

Angular distance along the observer's meridian between equator and the observer
Elevation of the elevated pole
All listed here
Declination of the observer's zenith

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Surveying
In the prismatic compass

the magnetic needle and graduated circle do 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 line of the sight does not move with the box
the magnetic needle moves with the box

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