1. Topographic Maps

2. Bell Ringer
Draw a Map of the Mountain of play-doh located in the front of the classroom.

3. Bell Ringer Follow up

4. Topographic Maps
Topographic Map – is a map that shows surface features, or topography of the earth.
Show natural features
Rivers, lakes, and mountains
Features made by humans
Bridges, roads, and cities.
Elevation
The height of an object above sea level.

5. Elements of Elevation
United States Geological Survey (USGS) – a federal government agency responsible for making the majority of topographic maps for the United States.

6. Contour Lines Contour lines are lines that are used to show elevation.
Connect points of equal elevation.
The spacing between contour lines indicate slope and the closer the lines are together the steeper the slope.

7. Contour Interval
Contour Interval – the difference in elevation between one contour line and the next.
In the map below the contour interval is 20ft.

8. Relief Relief – the variations in elevation of a land surface.
The difference between the highest elevation to the lowest elevation.
Because, a Mountain is large, the relief may be shown on a larger contour scale lets say 100ft.
Where somewhere like New Bern maybe shown on a scale of 10ft.

9. Index Contour
Index Contour - is a darker, heavier contour line that is usually every fifth line and that is labeled by its elevation.

10. Rules for Reading Contour Lines
Contour lines never cross.
All points along a contour line represent one elevation.
The spacing of contour lines depends on slope characteristics.
Ex. Contour lines that are close together show a steep slope. Contour lines that are far apart show a gentle slope.
Contour lines that pass a valley or stream are V shaped.
The V points to the area of highest elevation.
The tops of hills, mountains, and depressions are shown by closed circles.

11. Depressions are Represented by the Image Below

12. Bathymetric Maps
Maps that work like topographic maps except the show the depths of the ocean floor.

13. Geologic Map
Geologic Maps show the geological features of an area such as rock formations, faults, or other geological data.

14. Topographic Maps

16. Group Activity Road Maps

17. End of Section 2.3