1. Terrain Mapping DEMs Contours Slope Aspect Hillshades

2. Digital Elevation Model (DEM) Mt. Hood

3. Counters Generates a polyline Shapefile

4. Contours DEM Cross Section 2000m 1900m 2100m 2200m

5. 200 Meter Countours

6. Calculating Slope DEM Cross Section

7. Slope Calculation Fits a plane through 3x3 pixels around the pixel of interest What effect does this have on the uncertainty of the resulting raster? 108109113 112123128 125127130

8. Slope Calculation Angle Rise Run Slope = (Rise/Run) * 100% Can be: -Degrees -Percent 3 x 3 Cell Angle

9. Z-Factor Converts the elevations in the DEM to the same units as the x,y dimensions Easiest approach is to: –Project the DEM to a spatial reference that is in meters (i.e. UTM) –Scale the elevation values the meters if not already in meters

10. Slope

11. Aspect – Direction of the slope Slope Aspect (Direction) Angle Rise Run Slope = (Rise/Run) * 100%

12. Aspect

13. Hillshade Creates a raster that appears to be a photo from above the area, shaded by the sun. Frequently used as a background, rarely for analysis Z-factor can be used to make the hillshade more dramatic

14. Hill-shade

15. Hillshade: Z-Factor=1

16. Hill-shade: Z-Factor=10

17. Color Hillshade Transparent DEM with Color Ramp

18. Hillshade: RMNP

19. Resample Can Remove Artifacts

20. Resolution*2, Bicubic

21. Create Your Own Backgrounds!