topo-bathymetric lidar to support enhanced coastal mapping
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Topo-bathymetric lidar to support enhanced coastal mapping for shellfish
Aquaculture & Eelgrass mappingDepartment of Fisheries and Oceans Gulf Region –
Kevin McGuigan - Research Associate AGRG, NSCC
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Geology
Antarctica Siberia
West Africa
North America
3 Billion years ago…
Colombia Super ContinentCO2
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Biology
Geology
Cyanobacteria
ucmp.berkeley.edu
O2
CO2
1.5 Billion years ago…
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Biology
Geology
Great Extinction
Proliferation of Respiratory Life
britannica.com
Banded Iron Formations
O2
O2O2
Fe2O3
500 Million years ago…
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Now..
Biology
Geology
Society
Remote Sensing
Physics
CO2
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NWATL, CHS, NRCAN, Boulder, NOAA, UNB, UNH, OPTECH, USGS, UofMaine
PEI Eutrophication
gov.pe.ca
Aquaculture
thechronicleherald.ca
Aquaculture Meteghanthechronicleherald.ca
AGRG
Shoreline Armoring
Society
• CoastalStewards
• Challenges /Opportunities
Nova Scotia Brant Decoy
forsythesauctions.com
European green crabcbc.ca
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NWATL, CHS, NRCAN, Boulder, NOAA, UNB, UNH, OPTECH, USGS, UofMaine
Biology
Algaed Eelgrass, Tabusintac Bay
AGRG
Port Mouton Eelgrass Monitoring
cbc.ca
Eelgrass Fish Habitatccesuffolk.org
Eelgrass Shellfish Habitat
southernfriedscience.com
• EELGRASS• Zosteraarina
• Coastal ‘Canary in the coal mine’
TD Sherman
Labyrinthula
‘Wasting Disease’
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We need to detect and communicate changes in regional eelgrass systematically…
Biology
Society
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https://earthenginepartners.appspot.com/science-2013-global-forest
Biology
Remote Sensing
Society
You Are Here
Turkey
Finland
Russia
Global Forest Cover Change
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• Ground Sampling
• Underwater Photography
• Single Beam Echosounder
• Multibeam Sonar
• Bathymetric Lidar
• Aerial Photography
• Satellite Imagery
Eelgrass Mapping Technologies
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• Ground Sampling
• Underwater Photography
• Single Beam Echosounder
• Multibeam Sonar
• Bathymetric Lidar
• Aerial Photography
• Satellite Imagery
Eelgrass Mapping Technologies
Shag Harbor, NS. AGRG
Shag Harbor, NS. AGRG
Cocagne River. AGRG
Cocagne River. AGRG
Bucket
BootsDGPS
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• Ground Sampling
• Underwater Photography
• Single Beam Echosounder
• Multibeam Sonar
• Bathymetric Lidar
• Aerial Photography
• Satellite Imagery
Eelgrass Mapping Technologies
Eelgrass, Shag Harbor, NS. AGRG
Kelp, Shag Harbor, NS. AGRG
Cocagne River. AGRG
Cocagne River, October 18 2015. AGRG
Photo Quadrat
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• Ground Sampling
• Underwater Photography
• Single Beam Echosounder
• Multibeam Sonar
• Bathymetric Lidar
• Aerial Photography
• Satellite Imagery
Eelgrass Mapping Technologies
biosonicsinc.com
biosonicsinc.com
Transect
BioSonics DT-X
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• Ground Sampling
• Underwater Photography
• Single Beam Echosounder
• Multibeam Sonar
• Bathymetric Lidar
• Aerial Photography
• Satellite Imagery
Eelgrass Mapping Technologies
Cape John, NS. AGRG
Reson T-20
teledyne-reson.com
Multibeam Deployment, 2014. AGRG
English Moss
Reson T20
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• Ground Sampling
• Underwater Photography
• Single Beam Echosounder
• Multibeam Sonar
• Bathymetric Lidar
• Aerial Photography
• Satellite Imagery
Eelgrass Mapping Technologies
LEICA-AHAB CHIROPTERA II
Cross Section
Waveform
3d-View
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• Ground Sampling
• Underwater Photography
• Single Beam Echosounder
• Multibeam Sonar
• Bathymetric Lidar
• Aerial Photography
• Satellite Imagery
Eelgrass Mapping Technologies
Cocagne River NB, 2015. AGRG
NDPI
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• Ground Sampling
• Underwater Photography
• Single Beam Echosounder
• Multibeam Sonar
• Bathymetric Lidar
• Aerial Photography
• Satellite Imagery
Eelgrass Mapping Technologies
Abasolo, J (2015); DOI: 10.1109/TGRS.2014.2377300
Image Copyright © DigitalGlobe
WorldView 2
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Eelgrass Mapping Technologies
• Ground Sampling
• Underwater Photography
• Single Beam Echosounder
• Multibeam Sonar
• Bathymetric Lidar
• Aerial Photography
• Satellite Imagery
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• Ground Sampling
• Underwater Photography
• Single Beam Echosounder
• Multibeam Sonar
• Bathymetric Lidar
• Aerial Photography
• Satellite Imagery
Eelgrass Mapping Technologies
ConfidenceCoverageEquipment
ExpenseOperational
ExpenseAdditional
BenefitOperational
Window
* More Expensive than Aerial Photography
Labour Intensive
Seamless Bathymetry for Hydrodynamic ModellingSun, Low
Clouds
Water Clarity
Direct Density MeasurementsWater Quality
Measurements
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• Ground Sampling
• Underwater Photography
• Single Beam Echosounder
• Multibeam Sonar
• Bathymetric Lidar
• Aerial Photography
• Satellite Imagery
Eelgrass Mapping Technologies
ConfidenceCoverageEquipment
ExpenseOperational
ExpenseAdditional
BenefitOperational
Window
Development
NSERC LEG/AGRG
Citizen Science
STANTEC/AGRG
SPACEX? Machine Learning
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• Ground Sampling
• Underwater Photography
• Single Beam Echosounder
• Multibeam Sonar
• Bathymetric Lidar
• Aerial Photography
• Satellite Imagery
Eelgrass Mapping Technologies
Sensor Depth
Eelgrass DepthTides
Too Shallow
Signal Loss
Water Clarity
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• Ground Sampling
• Underwater Photography
• Single Beam Echosounder
• Multibeam Sonar
• Bathymetric Lidar
• Aerial Photography
• Satellite Imagery
Eelgrass Mapping Technologies
Sensor Depth
Eelgrass DepthTidesWater Clarity
DevelopmentNoise
Reduction
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• What if there were a water surface?
• Unequal Water Column Noise?
BATHYMETRIC SIMULATION
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• What if noise reduction removed many valid vegetation returns?
Lidar Land Waveform
Lidar Water Waveform
BATHYMETRIC SIMULATION
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• Photosynthesis
• Radiometric Absorption
• Diffuse attenuation coefficient
• Substrate dependence
• Carrying capacity
• Ecosystem health
• Sustainable aquaculture
• Height, density, presence
Optical Physics of Bathymetric Lidar
http://www.oceanopticsbook.info/
Biology
Physics
Remote Sensing
Society
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NWATL, CHS, NRCAN, Boulder, NOAA, UNB, UNH, OPTECH, USGS, UofMaine
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NWATL, CHS, NRCAN, Boulder, NOAA, UNB, UNH, OPTECH, USGS, UofMaine
Country Harbour, NS
Banook Lake, NS
TabusintacBay, NB
Saint Simone, NB
CocagneRiver, NB
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• EelgrassDepth Curve
Contemporary Depth
Eelg
rass
P
rob
abili
ty
Contemporary Depth
Sign
al L
oss
C
om
pen
sati
on
Depth from HHWLT
Eelg
rass
P
rob
abili
ty
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• Eelgrass Height Index
• BiosonicsValidation Provided by Stantec
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• Eelgrass Presence / Absence product
• Eelgrass Presence Validation Provided by AGRG/DFO
Mas Much As 86% Agreement?
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• Eelgrass Presence / Absence product
• Biosonics % cover Provided by Stantec
Mas Much As 92% Agreement?
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With lidar.… (and some air photos, and some ground truth, and some singlebeam)
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NWATL, CHS, NRCAN, Boulder, NOAA, UNB, UNH, OPTECH, USGS, UofMaine
CocagneRiver, NB
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NWATL, CHS, NRCAN, Boulder, NOAA, UNB, UNH, OPTECH, USGS, UofMaine
Country Harbour, NS
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NWATL, CHS, NRCAN, Boulder, NOAA, UNB, UNH, OPTECH, USGS, UofMaine
Banook Lake, NS
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Things to work onMAKE IT WORK MORE CONSISTENTLY • Noise Reduction in water column
• Depth Attenuation Compensation
• Airphoto Air/Water Correction
• Glint/Sun Angle Removal
• Wave Form Metric Extraction
• Extracting Additional points from lidar
• Many more …
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