Topographic Maps
Definition of a Topographic Map
Graphically show the contour of the land Helps the reader identify physical features uses lines to show elevation
How to read a map? (4 things)
Orientation (which way is up) Title (is it the right place) Scale (how far do I have to go) Key/Legend (what does that symbol mean)
A topographic map is
a map that uses lines to show elevation
spur
bumps on the side of a hill
Every contour line eventually
closes against itself
The difference in value between 2 contour lines is the
contour interval
A _______________ is a side view of a particular area.
cross section
index contours
darker than the others usually every 5th line elevation usually shown
The __________ can be determined by estimating the distance between contour lines.
elevation
Closed depressions are shown by
hachures
the line that is shaded darker than the rest is the
index contour
hachure marks
marks that show depressions at the top of a volcano/mountain
The farther apart the contour lines the ______ the slope
more gradual
Definition of a Map
represents place or space represents a 3D thing on a flat surface much smaller than what it represents
The zero contour line is
sea level
The closer the contour lines the ______ the slope
steeper
direction arrow
the arrow that is not inside the bezel that is bigger than the other arrows
edge
the edge of the compass
Bezel
the part on a compass that you can turn around
north arrow
the red arrow that points north
Universal transverse mercator
the system card to help plot points
Contour lines form _____ when they cross strams or valleys. These _____ point _____ or __________.
v's v's upstream up the valley
reentrant
where a contour line crosses a stream or a valley, the contour bends to form a "v" that points upstream or up the valley