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Via Afrika Geography

topographic maps • Contours are shown as brown lines on maps. Contours join all places of equal height above mean sea level m). • The South African 1:50 0 topographic maps have a contour interval of 20 m. On the 1:10 0 orthophoto maps the interval is 5 m. • Contour lines close to each other indicate steep slopes.

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  Topographic

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