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Taming Terrain: Sculpting Geoscapes With LiDAR

Andrew Godwin
August 31, 2018
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140

Taming Terrain: Sculpting Geoscapes With LiDAR

A presentation I gave at Electromagnetic Field 2018

Andrew Godwin

August 31, 2018
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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