1. Explain the use of contours on topographical sheets.
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Contour lines show shape and elevation of terrain because they connect points of equal elevation. It shows the gentleness or steepness of a terrain.
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contour lines are imaginary lines joining places which have the same height above the mean sea level . it is used to show the elevation of the land , steepness of its slope, while topographical sheets are used to show the surface of the earth in detail. also it is a large scale map. and is used even for defence.
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