What is Contour line, Contour map & contour interval?

Contour line

The intersection line joining level surface and ground surface is known as contour line or the line joining the points of equal reduced level.

Contour map

The map which shows only contour lines is known as contour map.

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Contour interval

Counter interval is the difference between the two consecutive contour lines on map

Eg:- suppose a contour map having contour lines of 100m, 98m, 96m then

Contour interval= 2m

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