Rules of
Contouring
(Gedzelman,
p15-16)
¥ÒEvery point
on a given contour line has the same value of height above sea level.Ó
¥ÒEvery contour line separates regions with
greater values than on the
line itself from regions with smaller values than on the line itself.Ó
¥ÒThe closer the contour lines, the steeper the
slope or larger the gradient.Ó
¥ÒThe shape of the contours indicates the shape
of the map features.Ó