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. MorrisEric.Morris@NOAA.gov

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.