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Final morris esri_nwgis_lidar

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Discussion of the science, collection and availability of lidar, specifically topobathymetric lidar. Use of NOAA/USGS Interagency Elevation Inventory leveraged

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Final morris esri_nwgis_lidar

  1. 1. Coastal Lidar Breakdown Concerns, Trends & Data Availability Eric Morris Northwest GIS User’s Conference October 16, 2014
  2. 2. Active System •Uses laser ranges, scan angle & positional IMU data to produce x,y,z and intensity for corresponding ground returns Basics of Light Detection and Ranging
  3. 3. • Accuracies dependent on calibration and GPS base station • Post-processing is costly • Collected, stored in “point clouds” • ≥400,000 pulses/sec • ~a million data points every 2.5 seconds. Basics of Light Detection and Ranging
  4. 4. A (Brief) History of Lidar • 1960s – lunar laser ranging (to aid Apollo landing) • 1977 – NOAA/NASA AOL looked to the clouds • 1993 – GPS & IMU allowed accurate airborne use • 2003 – ASPRS LAS 1.0 format (open source) • 2010 – National Enhanced Elevation Assessment (NEEA) • 2012 – U.S. Interagency Elevation Inventory • 2014 – 3DEP • ~2020 – GEDI – worldwide canopy at 1 m
  5. 5. Concerns
  6. 6. Geodesy
  7. 7. Vertical & Horizontal Accuracy
  8. 8. RMSEZ & ρ
  9. 9. Raw Data  Raw DEM
  10. 10. ASCII, LAS, LAZ, ZLAS Raw Data
  11. 11. Evolution of Elevation Data
  12. 12. Evolution of Elevation Data
  13. 13. Evolution of Elevation Data
  14. 14. Evolution of Elevation Data
  15. 15. Point Cloud Elevation
  16. 16. Intensity
  17. 17. RGB encoded
  18. 18. Classified
  19. 19. Discrete Lidar Returns
  20. 20. DSM DTM
  21. 21. Bare-earth
  22. 22. Breaklines
  23. 23. 1 meter Contours from 1 meter Lidar
  24. 24. Canopy
  25. 25. Why we need lidar
  26. 26. Lidar Applications
  27. 27. Slope Stability Oso, WA
  28. 28. White Oak, NC Ag Practices
  29. 29. Cultural Preservation
  30. 30. Mobile Lidar Colorado Spring, Co
  31. 31. Out there uses…
  32. 32. Coastal Lidar
  33. 33. Topobathy
  34. 34. Why Topobathy Tampa Bay, FL
  35. 35. Why Topobathy 70 m NOAA-NGS Post-Sandy Atlantic Seaboard Mapping Project Avalon, NJ
  36. 36. Airborne Lidar Bathymetry (ALB) • Applicable to oceans, rivers, lakes • Tides • Snell’s Law • Water Clarity • Eye safety • Air Space • Refraction “Requires more everything” Tampa Bay, FL
  37. 37. Geoarchaeology Pago Pago, American Samoa
  38. 38. Coastal Zone Management Great South Bay, Long Island, NY
  39. 39. Shoreline Delineation Ocracoke, NC
  40. 40. Beach Erosion Natural Disaster Assessments Fire Island, NY
  41. 41. Willapa, WA
  42. 42. Trends
  43. 43. 1995 - 2000
  44. 44. 2001 - 2003
  45. 45. 2004 - 2006
  46. 46. 2007 - 2009
  47. 47. 2010 - 2012
  48. 48. 2013 - 2015
  49. 49. 2013 – 2015 Caribbean, Hawaii, Alaska
  50. 50. Planned/Funded or In-Progress
  51. 51. Topobathymetric Lidar
  52. 52. Completed ALB
  53. 53. ALB Great Lakes
  54. 54. ALB West & East Coasts
  55. 55. ALB Southeast & Gulf Coast
  56. 56. Hawaii Puerto Rico USVI ALB
  57. 57. ALB Planned
  58. 58. Data Availability
  59. 59. Data Availability
  60. 60. Data Availability
  61. 61. www.coast.noaa.gov/digitalcoast/
  62. 62. Kirk Waters, PhD, Applied Sciences, NOAA OCM Amar Nayegandhi, Director of Remote Sensing, Dewberry Chris Parrish, PhD, formerly of the NOAA NGS and NOAA CCOM-JHC, now at Oregon State Univ.’s School of Civil and Construction Engineering Special Thanks and Acknowledgements
  63. 63. www.coast.noaa.gov/digitalcoast Eric L. Morris Eric.Morris@NOAA.gov Questions?

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