- Contours are imaginary lines which join places of equal heights
- The number of intervals (or spaces) between these lines indicate if the land is rising steeply or gently at that point.
- The closer the interval the higher the gradient
- The height of any point on a contour line is measured in meters above sea level
This map extract is of Purple Mountain in Co Kerry.
The first contour line is at 50 meters and rises to it’s highest peak at 832 meters.
Notice the closer the interval the higher the gradient