1. Andy Stauffer - CEGIS June 2011 Terrain Generalization : Recommendations 3 breaks – 24K – 250K – 250K – 750K – 750K – 1M Processing Steps – 10m DEM, smoothed once(LGDEM) – 10m DEM, smoothed 10 times(MDDEM) – 30m DEM aggregated, smoothed 10 times(SMDEM)

2. Andy Stauffer - CEGIS June 2011 24 50 100 250 500 750 1M 10-L10-110-510-1010-1530-L30-130-530-1030-15 Grand Canyon Rugged Terrain

3. Close up Example of Decisions 24K50K250K 500K1M

4. Detail 1M correct 1M using 24K processing X X

5. Close up Example of Decisions 24K50K250K 500K1M

6. Close up Example of Decisions 24K50K250K 500K 1M

7. Close up Example of Decisions 24K50K250K 500K1M

8. Andy Stauffer - CEGIS June 2011 Adjustment to Hillshading Sky Illumination Model hillshade (Kennelly&Stewart, 2006) – Combine multiple hillshades with different azimuths Default Hillshade Sky Illumination Hillshade X X X X

9. Contours : Creation 10m DEM Focal Statistics Contours 24 - 100 MED DEM Focal Statistics LG DEM Contours 100 - 250 Aggregate Focal Statistics SM DEM Contours 250 - 750 Aggregate Focal Statistics XS DEM Contours 750 - 1M

10. Andy Stauffer - CEGIS June 2011 Contours : Analyzing contours Looked at each subbasin to determine: – Contour density – Contour complexity

11. Andy Stauffer - CEGIS June 2011 Contours : 250K, 25m intervals Derived from md scale DEMDerived from sm scale DEM X X

12. Andy Stauffer - CEGIS June 2011 Contours : Recommendations Scale Contour Smoothing Mountainous Contour Interval Hilly Contour Interval Flat Contour Interval 24KLG DEM25m10m5m 50KLG DEM25105 100KMED DEM25 5 250KSM DEM10025 500KSM DEM10050 750KXS DEM25010050 1MXS DEM250100 CO WV ATL MO STL TX FL/GA UT

13. Andy Stauffer - CEGIS June 2011 Putting it all together : ScaleMaster To>