1. LiDAR Contour Options Randy Mayden, VP Business Development randym@surdex.com

2. Surdex Corporation ■Surdex headquartered in St. Louis, MO area ■Over a half-century of photogrammetric mapping ~100 employees 8 aircraft – 4 Cessna 441 (Conquest) Turbine Aircraft 3 Intergraph Digital Mapping Cameras (DMC) 1 UltraCam Xp Wide Angle 5 film cameras Leica ALS 50-II LiDAR ■Very progressive R&D Large amount of proprietary algorithms and software Focus on cost-efficiency and performance

3. LiDAR Processing GPS/IMU Processing IMU Data Reduction GC Check Position Attitude GPS LASER Measurements (Range, Angle, Time) Classification X,Y,Z Point Cloud Stereo QC / Edit Classified Points (Bare-earth, veg/building) Stereo Images Data Thinning TIN Break- lines DTM Surface AUTOMATIC MANUAL 2D Edit TIN LASER Intensity, RGB Ortho Photos

4. First Return DEM Bare Earth DEM Calculations 1.Identify man made structures Determine ground elevation at edges 2. Identify vegetated areas Search for ground points within area 3. Identify open areas 4. Interpolate between available points 5. Filtering and clean- up

5. Bare Earth DEM Automatically extracted Bare Earth DEM Ground surface with vegetation and man-made structures removed Critical for terrain and hydrology modeling

6. Bare Earth DEM with 1 meter contours

7. Raw vs. Edited LiDAR Contours Contours from raw LiDAR data Contours from raw LiDAR data with photogrammetric edits

8. Types of LiDAR DTM & Contours  Level I Classified to bare earth, automated generation  Level II Classified to bare earth Automated, minimal cartographic edits  Level III Classified to bare earth Break lines added to hydrology Similar cartographic edits of Level II  Level IV (Specified contour accuracy) Classified to bare earth Full break line enhancement Full cartographic edits

9. Level 1-2 surface

10. Level 1

11. Level 1 Surface and Contours

12. Level 2 Contours

13. Level 2 Surface and Contours

14. Level 3 Hydro Breaklines

15. Level 3 surface

16. Level 1-2 SurfaceLevel 3 Surface

17. Level 3 Surface and Contours

18. Level 3 Contours

19. Project Area, St. Louis MO

20. Contours from Bare Earth

21. Hydro and terrain breaklines

22. Full break line enforced contours

23. Full break line enforcement

24. Contours from LiDAR Data ■Understand the various data available ■Understand the cost associated with additional editing and processing ■Discuss the project requirements with your LiDAR provider ■Get ready for A LOT of data!

26. Level 4 Photogrammetric Enhanced

27. LiDAR Data ■First, middle, last return Position Elevation Intensity ■Products Intensity Image Digital Surface Model Digital Terrain Model Classification Contours

28. First Returns Second Returns Third Returns Last Returns All Returns

29. Elevation Cross Section

30. Ground Cross Section

31. Level 3

32. Level 3 Contours with Breaklines