2. 2-D 3-D

3. Building a home Landscaping Hiking Fishing Camping Planning a highway Why are Topographic Maps Useful? Who uses Topographic Maps? Military Construction Workers Geologists Farmers Hikers Campers

4. Another way to express slope is gradient. Gradient is the average slope of a particular area on a map. The formula for gradient is: Change in field value Distance Gradient

6. The formula for gradient can be found on page 1 of your ESRT’s Field value is whatever the isolines on the map are measuring. Distance is the actual distance between 2 points given using the map scale.

7. Example Gradient = change in field value Distance Gradient = 400 m – 200 m B Elevation in meters 2 miles Gradient = 200 m 2 miles Gradient = meters mile 12Miles A 100

8. Letters A, B, C, D, and E on the topographic map shown below represent locations on Earth's surface. Letters K, L, M, and N are locations along Copper Creek. Elevations are measured in meters. Calculate the gradient between points B and C on the topographic map shown and label your answer with the correct units. Be sure to show all your work, including proper units. Express your answer to the nearest tenth.

9. Change in field value Distance Gradient = 50 m – 10 m 2km G = 40 m 2km == m km 20 NOT DONE YET Calculate the gradient between points B and C on the topographic map shown and label your answer with the correct units. Be sure to show all your work, including proper units. Express your answer to the nearest tenth. 20.0 m km