Taming Terrain: Sculpting Geoscapes With LiDAR

A presentation I gave at Electromagnetic Field 2018

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