Lidar Breakdown - ESRI SE
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Lidar Breakdown Concerns, Trends & Availability Eric Morris ESRI Southeast User Conference May 4 th , 2015
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Transcript of Lidar Breakdown - ESRI SE
Lidar BreakdownConcerns, Trends & Availability
Eric Morris
ESRI Southeast User ConferenceMay 4th, 2015
Active System•Uses laser ranges, scan angle & positional IMU data to produce x,y,z•Post-processing costly•“point clouds”•>400K pulses/sec
Basics of Light Detection and Ranging
A (Brief) History of Lidar
• 1960s – Apollo landings• 1977 – NOAA/NASA AOL• 1993 – Airborne GPS & IMU• 2003 – ASPRS LAS 1.0 format (open source)• 2010 – NEEA• 2012 – U.S. Interagency Elevation Inventory• 2014 – 3DEP • ~2020 – GEDI
ConcernsGeodesy Vertical & Horizontal Accuracy
RMSEZ & ρ
Raw Data Raw DEM
ASCII, LAS, LAZ, ZLAS
Evolution of Elevation Data
The Point Cloud
Why we need lidar
DSM DTM
Slope StabilityOso, WA
Coastal Zone Management
Great South Bay, Long Island, NY
Shoreline Delineation
Ocracoke, NC
Beach Erosion
Natural Disaster
Assessments
Fire Island, NY
Willapa, WA
NOAA Lidar
Topobathy
Why Topobathy
Tampa Bay, FL
Why Topobathy
70 m
NOAA-NGS Post-Sandy Atlantic Seaboard Mapping
Project
Avalon, NJ
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
Trends
Data Availability
Data Availability
www.coast.noaa.gov/digitalcoast/
1995 - 2000
2001 - 2003
2004 - 2006
2007 - 2009
2010 - 2012
2013 - 2015
Quality Level
Planned/Funded or In-Progress
Completed Topobathymetric Lidar
Planned Topobathy
www.coast.noaa.gov/digitalcoast
Eric L. [email protected]
Questions?
Special Thanks:Kirk Waters, PhD, Applied Sciences, NOAA OCMAmar Nayegandhi, Director of Remote Sensing, DewberryChris Parrish, PhD, formerly of NOAA NGS and CCOM-JHC, now at Oregon State Univ.
