1. 1) Using the review books define the following:
Contour map (same as topographic map)
Contour line
Gradient
Contour interval
Profile
Map that shows the shape of an area
Lines connecting points
of equal elevation
Change in elevation over a distance
Difference in elevation
between two contour lines
Shows the changes in elevation
from a side view

2. Aim: How do topographic maps allow us to view an area?
Topic: Unit 1
Main Idea: Rules for Topographic Mapping

3. 2) What happens to elevation inside of a contour line?
The elevation increases inside of the line. 60 80

4. 3) How do you find the contour interval?
Subtract two contour index lines and divide by the number of hops.
70 ft – 10 ft
__________
4 hops 40 25
15 ft 55 80
100 ft

5. 4) When drawing contour lines what two things must they either do?
Connect into a circle
Touch the edge of the map

6. 5) How do you figure out the highest possible elevation on a topographic map?
Figure out the value of the next line then subtract 1.
59 ft
79 ft

7. 6) How do you figure out the lowest possible elevation between two contour lines?
Look at the lowest adjacent line then add 1.
11 ft
31 ft

8. 7) What happens to a contour line when it crosses a river?
Contour lines bend upstream. The river flows opposite the point of the bend.

9. 8) How do you know if the gradient is steep?B
Lines are closer
The closer the contour lines, the steeper the gradient.

10. 9) What are some ways to know which way is up on a topographic map?
Higher elevations
The point of the “V” points up

11. 10) What do hachure lines represent?
They show a hole or depression

12. 10) What do hachure lines represent?ft ft

13. 11) Why can’t two contour lines cross?
One point can’t have TWO elevations.

14. Can we answer these?

15. How do we number hachure lines?60
100 80
100 80