Taming Terrain: Sculpting Geoscapes With LiDAR

Transcript

1. Taming Terrain Sculpting geoscapes from LIDAR Andrew Godwin @andrewgodwin

2. Andrew Godwin / @andrewgodwin Hi, I’m Andrew Godwin • Python

   programmer-at-large • Geodata enthusiast • Does not (yet) own LiDAR equipment

3. Andrew Godwin / @andrewgodwin

4. Andrew Godwin / @andrewgodwin

5. Andrew Godwin / @andrewgodwin

6. Andrew Godwin / @andrewgodwin 1. Data 2. Modelling 3. Fabrication

7. Andrew Godwin / @andrewgodwin 1. Elevation Data

8. Andrew Godwin / @andrewgodwin Can be either surface or terrain

   (no buildings/plants) Digital Elevation Model

9. Andrew Godwin / @andrewgodwin Source: maps-for-free.com

10. Andrew Godwin / @andrewgodwin Hawai'i (ASTER GDEM)

11. Andrew Godwin / @andrewgodwin Radar

12. Andrew Godwin / @andrewgodwin Low resolution Needs large-ish antennas Long

    distance

13. Andrew Godwin / @andrewgodwin LiDAR

14. Andrew Godwin / @andrewgodwin Light Detection And Ranging

15. Andrew Godwin / @andrewgodwin

16. Andrew Godwin / @andrewgodwin

17. Andrew Godwin / @andrewgodwin Very high resolution (cm range) Compact

    devices (planes or vehicles) Short distances

18. Andrew Godwin / @andrewgodwin Free data in both point clouds

    and DEMs! e.g. Environment Agency, USGIS

19. Andrew Godwin / @andrewgodwin data.gov.uk earthexplorer.usgs.gov

20. Andrew Godwin / @andrewgodwin 2. Processing

21. Andrew Godwin / @andrewgodwin "Point Cloud"

22. Andrew Godwin / @andrewgodwin Multiple returns Too much detail Noisy

23. Andrew Godwin / @andrewgodwin

24. Andrew Godwin / @andrewgodwin a. "Thin" point cloud b. Rasterise

    point cloud to DEM c. Smooth results

25. Andrew Godwin / @andrewgodwin 3. Fabrication

26. Andrew Godwin / @andrewgodwin 3D Printing Laser Cutting Milling

27. Andrew Godwin / @andrewgodwin 3D Printing

28. Andrew Godwin / @andrewgodwin

29. Andrew Godwin / @andrewgodwin

30. Andrew Godwin / @andrewgodwin

31. Andrew Godwin / @andrewgodwin

32. Andrew Godwin / @andrewgodwin 4 - 12 unattended hours (per

    15cm tile) Difficult to line up perfectly Has to print perfectly square!

33. Andrew Godwin / @andrewgodwin Milling

34. Andrew Godwin / @andrewgodwin

35. Andrew Godwin / @andrewgodwin

36. Andrew Godwin / @andrewgodwin

37. Andrew Godwin / @andrewgodwin 2 - 4 attended hours per

    10cm piece Small features hard to mill CNC mills ain't cheap

38. Andrew Godwin / @andrewgodwin Laser Cutting

39. Andrew Godwin / @andrewgodwin

40. Andrew Godwin / @andrewgodwin

41. Andrew Godwin / @andrewgodwin

42. Andrew Godwin / @andrewgodwin 15 minutes to cut, 15 mins

    to glue Only works for features surrounded by flat Limited detail

43. Andrew Godwin / @andrewgodwin What's next?

44. Andrew Godwin / @andrewgodwin Less human-intensive milling Better laser cut

    feature highlighting 3D directly from point clouds Somehow getting a LiDAR scanner?!

45. Andrew Godwin / @andrewgodwin code: github.com/andrewgodwin/lidartile blog: aeracode.org videos: youtube.com/user/andrewgodwin

46. Thanks. Andrew Godwin @andrewgodwin aeracode.org