1. Creating Shaded Relief Images Using Aerial Photos, DEMs and ArcMap

2. Color aerial photo with.5 m resolution

3. DEM with approx 10 m resolution

4. Hillshade created from DEM with default lighting at 315° azimuth, 45° altitude

5. Hillshade created from DEM with lighting at 170° azimuth, 40° altitude to approx match shadows on aerial photo

6. Hillshade with 315° lighting angleHillshade with 170° lighting angle

7. Hillshade lit from 315°Naturally lit orthophoto conflicting shadows

8. Naturally lit orthophotoHillshade lit from 170° complimentary shadows

9. Combined orthophoto and semi-transparent hillshade using hillshade constructed with 315° lighting angle

10. Combined orthophoto and semi-transparent hillshade using hillshade constructed with 170° lighting angle

11. Inset of shaded relief orthophoto using 315° lighting angle

12. Creating 3D Scenes Using Aerial Photograph, DEM and ArcScene

13. Aerial photo added to ArcScene, default view

14. Photo rotated and viewed edge on confirms 2D representation

15. In the Layer Properties box for the air photo, click on the Base Heights tab and change the setting to obtain heights from surface and browse to the correct elevation file. The airphoto is now draped over the elevation surface as seen in this edge-on view

16. The default view now shows a true 3D representation of the scene

17. The Layer Properties Rendering tab is the key to getting good-looking images in ArcScene. Check the Shade areal features … box (this is unchecked by default). Change the Quality to High (this is set to a midpoint position by default). The high-quality render takes up lots of video memory, so, if you’re running on an older PC or one without a high end video card, your image may break up as it is rotated in ArcScene. The Shade areal features… comes into play on the next step, which will not work if this is not checked.

18. Scene Properties Illumination governs the scene light position. This light position, and checking the “shade layers relative to scene light” box in the layers properties, governs how shadows and highlights play across the scene as it is rotated, enhancing or disrupting the 3D effect.

20. The Sun Position and Elevation http://www.srrb.noaa.gov/highlights/sunrise/azel.html Lat/Long read from ArcMap screen Date and time from meta data

21. 315 ° 170 °

22. Zooming in for a closer lookScene light set to 315 ° : conflicting shadows do not match those in the air photo

23. Scene light set to 170 ° : No conflicting shadows with those in the air photo

24. 315 ° lighting angle 170 ° lighting angle

25. High quality render setting

26. Medium quality render setting

27. Low quality render setting

28. Render Quality Comparison High, Medium, Low (L to R)