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contour line science definition
A line on a map joining points of equal elevation above a given level, usually mean sea level.
♦ The change in elevation between one contour line and the next is the contour interval.
♦ The change in elevation between one contour line and the next is the contour interval.
contour line
Closely spaced contour lines on the right indicate a steeper grade than the more loosely spaced lines on the left.
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