1. Section 4: Topographic Maps
Topographic Map: a map showing the surface features of an area.

2. Topographic Maps Two dimensional model of the Earth’s surface
Topographic maps are also known as contour maps.
Show elevation above sea level using contour lines.

6. “Real World”
Contour Map

7. Topographic Maps Contour Line –
- line on a map that connects points of EQUAL elevation.
- show elevation and shape of the land
Relief – Difference between high and low elevations

9. Topographic Maps Contour Interval –
difference in elevation between each line. MUST be equal spacing.
Contour interval =
20 feet
580
560
540
520

10. Topographic Maps Index Contour –
Usually every 5th line is printed darker and has an elevation printed on it.

12. Closely Spaced Contours
Steeper Slope (Gradient) – contour lines are closer together.

14. Wide Spaced Contours
Gradual/Gentle Slope (Gradient) – contour lines are farther apart.

16. What are the dark contour lines on a topographic map?
What do the numbers on the dark contour lines indicate?
How do you determine the contour interval on a topographic map?
Pg. 27

17. Uses of Topographical Maps
Who would need to know the elevation, relief, or slope of a portion of Earth’s surface?
In which type of are would you build a ski resort?
Where would you build a shopping mall?
Pg 30