In this example, SYMBOL1 defines a text label for the lowest contour level. Each remaining contour line gets the default label, which is the contour variable's value at that contour level. All the ...

Geography KS3 & GCSE: Contour lines and gradients. This video clip demonstrates how contour lines can be used to understand gradients. Suitable for teaching geography at GCSE and National 4 / 5.