![]() Contour lines of different heights can never cross each other. Index contours are bold or thicker lines that appear at every fifth contour line. Moreover, they allow us to visualize the changes in height over a particular area. These lines represent the elevation of the terrain. It is because the Contour lines are an essential tool for understanding the topography of the land. ![]() See examples of map symbols, contour lines and triangulation points on Ordnance Survey (OS) maps. The importance of Contour lines in the landscape is important especially if you are a Geography student. Find out what contour lines are, how they show height on a map, and how to measure direction using a compass. A contour interval is the vertical distance or difference in elevation between contour lines. Learn how to use map symbols, directions and contour lines to find and explore different features of the landscape. In a depression, the contour lines also form circles the values of their elevation, however, decrease from the edge to the centre. A contour line is a line drawn on a topographic map to indicate ground elevation or depression. Students match up the names of key landforms with their definitions and the shape of the landform as shown on maps by contour lines. Therefore the topographic profile in Figure 3.6 represents a profile of the map surface (along the A-B line) that has been vertically exaggerated by 10 times (10X). On a hill, the contour lines form circles whereby the values of their elevation increase from the edge to the centre. This KS3-4 geography resource develops knowledge of contours lines to identify different features within a landscape.
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