1. Step By Step

2. Step 1 Building Base Data

3. Concern Determine Concern 3 levels, based on number of viewers and area attributes. Route system usually provides the base.

4. Concern Level 1 State and Federal Highways Wild/Scenic Rivers Forest Highways, Scenic Byways and major recreation sites & access

5. Concern Level 2 County Roads Wilderness and wilderness access trails Other scenic routes

6. Concern Level 3 Other Forest Roads

7. Prepare Concern Buffer Project Area Clip Concern Layer Separate Concern by levels 12 miles

8. Build Surface Clip Elevation Calculate roughness to use as impedance

9. Step 2 Build View Zones

10. Distance Zones

11. Adding Topography

12. Cost Distance Using the impedance raster compute the cost distance for each of the concern layers.

13. Concern level 1 Calculate Reclassify into zones FG1 MG1 BG1

14. Concern level 2 Calculate Reclassify into zones FG1 MG1 BG1

15. Concern level 3 Calculate Reclassify into zones FG1 MG1 BG1

16. Step 3 Build View Points

17. Create Fishnet Create 1 km Fishnet using XTools

18. Build Level 1 points Combine fishnet with concern 1 routes using ‘Feature to Line’ tool. Delete Fishnet (concern = 0) Convert segments to points with ‘Feature to Point’ tool

19. Repeat for level 2 Combine fishnet with concern 2 routes using ‘Feature to Line’ tool. Delete Fishnet (concern = 0) Convert segments to points with ‘Feature to Point’ tool

20. And again for level 3 Combine fishnet with concern 2 routes using ‘Feature to Line’ tool. Delete Fishnet (concern = 0) Convert segments to points with ‘Feature to Point’ tool

21. Group for Processing Subdivide viewpoints into groups of 200-300 points. Use buffered clips of elevation, based on the zones.

22. Viewsheds: Level 1 Calculate viewsheds for each zone.

23. Viewsheds: Level 2 Repeat modeling for Concern Level 2 points, by each zone

24. Viewsheds: Level 3 And again, model viewsheds for the concern level 3 points, by zone.

25. Combine Viewsheds Combine viewsheds for each concern level using MAXIMUM method

26. Step 4 Combine view zones with viewsheds.

27. Use Viewshed to mask Zones Unmask Foreground Redraw Zones Masking Viewsheds

28. Level 1 Viewsheds Extract Foreground Zone Set up not seen area mask for concern level Mask middle and background zones FG1 MG1 BG1 Not seen

29. Level 2 Viewsheds Extract Foreground 2 Zone Set up not seen area mask for concern level Mask middle and background zones FG2 MG2 BG2 Not seen

30. Level 3 Viewsheds Extract Foreground 3 Zone Set up not seen area mask for concern level Mask middle and background zones FG3 MG3 BG3 Not seen

31. Putting it together Combine the resulting rasters

32. Final Processing Convert to polygons Classify grid values and dissolve Eliminate zones less than 100 acres Clip to boundary

33. A Closer Look

34. References Landscape Aesthetics- Agriculture Handbook 701 ESRI Spatial Analyst Help Files USFS-2010 David C. M c Morran

35. Step By Step