Cross section
It is supposed a hill has been cut
vertically, then we can see the side view,
or cross section of the hill
A section is a slice vertically down
through the land.
 A cross section shows the shape of the
lands.
View from
the side
View from
the top
Cross section
 It is supposed a hill has been cut vertically, then we
can see the side view, or cross section of the hill.
 A cross section can tell us the shape of the hill.
Cross Section
• Draw a straight line
connecting the two
points (X & Y).
Cross Section
• Take a strip of
paper along the
straight line
• Mark point X and
point Y on the
edge of the paper
Cross Section
• On the paper strip,
mark the position of X
and Y
• Mark all the contour
lines and their heights
between the two
points
Cross Section
M
• Draw a frame for the
cross section.
• The length of the
base line is the same
as the length of the
straight line
• The two points X and
Y also is marked on
the two ends of the
base line.
Cross Section
M
The height
must be
started at 0
unit
• Decide the vertical
scale of the cross
section.
• On the left-hand side
of the frame, mark the
height at the regular
interval.
• The highest mark
must just be higher
than the one on the
paper strip.
Cross Section
M
• On the frame, draw
the horizontal lines for
each height interval.
• On the top of the left
hand side of the
frame, mark ‘meter’
for the unit of the
height
• Put the paper the strip
at the bottom of the
frame, with X and Y
touching both ends.
Cross Section
• Use a pencil to draw a perpendicular line from
each marking on the paper strip unit it reaches
the horizontal line with the same height.
• Mark a small “x” on the horizontal line.
• Join all the points with a smooth line.
Cross Section
Y
X
metres
30
20
10
0