Cumulative height frequency curve for the Earth surface is known as hypsometric curve. Hypsometric curve is
graphical representation used to show the share of the earth’s land area that is at various heights above or below sea level. A
curve is a continuous and smooth flowing line without any sharp turns. Mathematically it is a cumulative height frequency curve
for the Earth surface or some part it. A hypsometric curve is a graph that shows the proportion of land area that exists at various
elevations by bends and changes direction of the curve. In this we plot relative area against relative height.
