Explanation

 Chain surveying is recommended when the area is relatively small and flat.

It is suitable for areas where precise measurements are required but complex terrain and large distances are not a factor. 

Explanation

 It's the location where the level is set up to take readings.

Chosen for clear sightlines to staff points.

Must be stable and roughly level for accuracy.

Explanation

 1 link in a 30-m chain = 20 cm

Used in metric land surveys for precise measurements.

Explanation

 A longer chain leads to underestimation of the actual distance.

Explanation

   Surveys that show the natural features of a country are known as topographic surveys

Explanation

 A mechanical or digital tool traces the boundary.

Directly gives the area.

Suitable for maps or complex shapes.

Explanation

This  angle measures how much one line deviates from another, often used

in surveying and navigation to establish the direction of a new line relative to a reference line.

Explanation

 The field record of a chain survey is entered at the field book or survey notebook.

This documentation includes measurements, sketches, and notes taken during the survey process.

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

Measured from a reference level, usually mean sea level.

Above datum: positive elevation; below datum: negative elevation.

Used in surveying, mapping, and construction.