1. Topographic Maps

2. Topographic Maps Show surface features or topography of the earth
Show both natural features and man-made features
Example: Mountains and Roads

6. Definitions Contour lines – connect points of equal elevation
Contour interval difference in elevation between two contour lines (subtract)
Index contours are bolder for reference (every 5th line)

7. Index Contour

8. Line Spacing Contour lines wide = land is flat
Contour lines close = land is steep
Important Symbols
Depression Contour (“Jabba the Hut symbol”) – shows holes or wells,
or volcano pits
2) Plus Sign – Mountain Top or Highest Point

10. How do we create a topographic map??
Elevation = 115 ft
Sea Level
Elevation = 0 ft

11. 20 ft

12. Depression Contour Lines – indicate a decrease in elevation
What happens to elevation in the center of a volcano?
Elevation decreases
Depression Contour Lines – indicate a decrease in elevation

13. Streams
What shape is made with the contour lines when a stream is present?
upstream
“V” Shape
How do you know which way the stream flows?
The bottom of the “V” shape points upstream

14. Shows the change in elevation of the land surface from the side view.
Topographic Profiles
DEFINITION
Shows the change in elevation of the land surface from the side view.
Must do the top view before the profile.

17. What can you tell me about this map?

18. Practical Example
Source

19. Questions for Review What is a topographic map and what does it show?
What is a contour line?
What is a contour interval?
What is an index contour?
How can we show the difference between a mountain top and a volcano pit?
How can we show flat land vs. a steep slope?

20. Discovery Ed Videos

21. CE Questions A contour line that is bold and labeled is called:
A) An index contour
B) A depression contour
C) A contour interval
D) A map scale

22. CE Questions A contour line that is bold and labeled is called:
A) An index contour
B) A depression contour
C) A contour interval
D) A map scale

23. CE Questions
On topographic maps, closely spaced contour lines indicate:
Valleys
Depressions
Mountain Peaks
Steep Slopes

24. CE Questions
On topographic maps, closely spaced contour lines indicate:
Valleys
Depressions
Mountain Peaks
Steep Slopes

25. More practice

26. More practice