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Question
____  is the horizontal distance between two points on any two consecutive contours and  ____  is the vertical distance between two consecutive contour lines.
A.
Contour gap, Horizontal equivalent
B.
Contour interval, Contour slope
C.
Horizontal equivalent, Contour interval
D.
Contour gap, Contour slope
Answer ( Option C)

Horizontal equivalent, Contour interval

Solution

Horizontal Equivalent:
1. The horizontal distance between two points on two consecutive contour lines for a given slope is known as horizontal equivalent.
2. For a given contour interval, scale of the map and the nature of terrain decide the horizontal equivalent. As the slope becomes more and more steeper, the horizontal equivalent decreases.
Additional information
Contour elevation:
It is the line joining points of equal elevation on the surface of the earth.
Contour Interval:
The difference in elevation between successive contour lines on a given map is fixed. This vertical distance between any two contour lines on a map is called the contour interval.

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