Test: Traverse Surveying & Contouring - 1 - Civil Engineering (CE) MCQ

Closed contours ⇒ Steep slope
Apart contour lines ⇒ Gentle slope
Equally spaced ⇒ Uniform slope Straight parallel and equally speed contours ⇒ plane surface

In order to measure the magnetic bearing of a line, the theodolite should be provided with either a tabular compass or trough compass.

Closed contours with higher values inwards represent a depression.

Explanation:

• Depression: In topographic maps, a depression is shown by closed contours with the highest elevation in the center. These contours are typically marked with hachure lines (short lines) pointing towards the center of the depression to indicate that the terrain dips downward.
• Hillock: A hillock would have the highest elevation at the center, with contours arranged around it in concentric circles, representing a rise in elevation, not a depression.
• Plain Surface: A plain would be represented by evenly spaced, straight, or gently curved contours, showing a flat or nearly level surface.

Answer:

Bowditch’s method - Correction to latitude (or departure) of any side

Transit method → Correction of latitude (and departure) of any side

The closing line will have south latitude and east departure. Therefore it will lie in S-E quadrant.