Surveying
In direct method of contouring, the process of locating or identifying points lying on a contour is called

ranging
vertical control
horizontal control
centring

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Surveying
In the prismatic compass

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
the magnetic needle and graduated circle do not move with the box

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Surveying
The necessary geometrical condition for triangulation adjustment is:

The sum of the angles around a station should be 360°
The sum of the three angles of a plane triangle should be 180°
All listed here
The sum of the eight angles of a braced quadrilateral should be 360°

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