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senseFly drones in agriculture
Eveli Sisas
AlphaGIS
senseFly
senseFly pioneered professional drones in 2009 and is world leader in fixed-wing drones
Founded in 2009
#1 used mapping drone
Lightest in class
20,000,000 ha mapped to date
• High precision on demand(RTK/PPK)
• Weights approx. 1.1 kg• Up to 59 min flight time• Up to 40 km2 max coverage
• Wind resistance up to 45 km/h (12 m/s)• senseFly S.O.D.A. RGB camera• eMotion 3
eBee Plus RTK/PPK
senseFly S.O.D.A. Parrot Sequoia thermoMAP
Fly
Analyse
Plan
Simple E2E workflow
• Hand launched
• Fully autonomous
• Highly precise landing
• No accessories
required
Pix4D
ArcGIS
AutoCAD
Agisoft
Airware
MicaSense
& many more
eMotion
• Mission block flight planning
• Full 3D environment
• Shapefile import
• 1 mission, multiple flights
• Export to cloud
eBee Plus applications
Surveying Quarries, aggregates &
mining
Remote sensing/researchUrban planning & land
management
Forestry/GIS
Earthworks/monitoring
Spectral signature of plants
Near infrared (700nm – 3μm)
Parrot Sequoia sensor
Reflectance map vs Orthomosaic
Reflectance Map Orthomosaic
optimized for radiometric accuracy perband usage of as many images as
possible
optimized for esthetic quality, file size,speed usage of as little images as possible
Green
Spectral analysis
Calculate Indexes
Reflectance Maps
Index as PointShapefile
Index as Polygon Shapefile
Index as TIFF or JPEG
Green
RED
NIR
RE
NDVI =NIR - RED
NIR + RED
What can I do with an NDVI?
Simple Ratio = NIR/Red (Jordan,
1969)
• Several studies show a high correlation between leaf area index (LAI)
• Consider crop stages
• Optimized Soil Vegetation Index (OSAVI)
Applications:
• Evaluate plant stands
• Gauge canopy development
• Helps with replant decisions
• Typically correlated to yield
• Not a silver bullet!
Using thermal data
• Thermal data is related to transpiration of a plant
• Hottest part of day, early morning is not good
• Sensitive to leaf area
• Cloudy or windy issues
CWSI = (dTm − dTLL)/(dTUL − dTLL)
(Jackson, 1981)
Applications:
• Irrigation management
• Soil moisture
• Moisture probe placement
Fully Irrigated
50%
Stress
40%
Stress
senseFly Agriculture
1. The drone is a tool to help solve problems, not
the end-goal in itself
2. Flying senseFly vehicles is the easy part
3. NDVI is not the solution to every crop issue
4. Advanced algorithms cannot replace local
agronomic experience
5. You can’t avoid getting your boots dirty