Question

Differentiate between vertical interval and horizontal distance.

Answer 1

Basis	Vertical Interval	Horizontal Distance
Meaning	Interval between two successive contours is called vertical interval.	The horizontal distance is the distance between two contours horizontally.
Change	The vertical interval between the two successive contour lines remains constant.	It varies from place to place depending upon the nature of slope. It is large when the slope is gentler and decreases with increasing slope gradient.
Expression	It is expressed as VT.	The horizontal distance, also known as the horizontal equivalent (HE).