Explanation

 if the figure is a regular shape, its area can be calculated using standard geometric formulas.

Short Detail:

Rectangle:

Area=Length× Breadth

Explanation

 A mechanical or digital tool traces the boundary.

Directly gives the area.

Suitable for maps or complex shapes.

Explanation

 More accurate than the End-Area Method, especially with uneven terrain or variable cross-sections

Explanation

 It indicates the elevation difference between the centroids of cut and fill areas.

Useful in analyzing the balance and effort of earth movement, especially on sloped terrains.

Plays a role in calculating the energy or cost of earthwork operations

Explanation

 It represents the lateral displacement between the centers of gravity of the cut and fill areas.

Important in mass haul diagrams and balancing earthworks.

Helps optimize the movement of material (cut to fill) during road or railway construction.

Explanation

 A contour line represents a line on a map or plan that connects points of equal elevation (RL) above a specific datum, 

usually mean sea level.

These lines help in showing the topography or relief of the land.

They are widely used in surveying, civil engineering, geography, and cartography.

Explanation

 Main feature: Allows precise line of sight adjustment without moving the entire instrument.

Explanation

 Held by hand or with a bubble level attached to ensure verticality.

If tilted, the reading becomes longer and inaccurate.

The staff person may use a plumb bob or circular bubble for precision.

Explanation

 A 14-foot three-piece staff means it has 3 equal sections.

Explanation

 Quick and efficient

Doesn’t require communication between two people

Ideal for differential levelling