5 Methods Developed to Show the Relief Features on a Map
A relief map shows the height of the land above the mean sea level on a flat surface. Several methods have been developed to show the relief features on a map. Some of them are the contours, form lines, layer- colouring, hill-shading, spot heights, bench marks, hachure’s, etc. These methods have their merits and demerits. Sometimes a combination of these methods is adopted, such as contours and form lines, contours and layer-colouring, etc. 1. Contours: A contour is an imaginary line of constant height above the mean sea level. The difference between the values of any two successive contours is known as the contour interval, or the vertical interval (V.I.). The horizontal distance between any two contours is called the horizontal equivalent or H.E. Its value depends upon the slope…