Physical Features

These include relief drainage climate and natural vegetation

Relief features.

For examination purposes, relief features on topographical maps are shown using Contour, spot heights and trigonometrical stations.

Contours

These are lines joining all points of the same heights above sea level on maps. The interval between successive contours is constant and is known as Vertical Interval (V.I).

It is very important to know the V.I of a map as it  will help you calculate the height of the unnumbered contour lines.

Contour are measured in feet or metres and lines are drawn in brown colours with heights of figures numbered either above the Contour line or long the trend.

Contour method is the most useful way of showing relief on maps because they show the actual height of the land and its shape as well as gradient. This can be shown below

Contours and the nature of land.