Origin of contour line
Examples from the Web for contour line
Historical Examples of contour line
It follows the 600-feet contour-line and winds 211 therefore exactly round the outline of the hill.
It ran straight along the 300-feet contour-line, and took the southern edge of a wood called Brockham Warren.
The contour-line of 0, or datum level, is the coastal boundary of any land form.