Verdantcrop survey.
Autonomous multispectral crop-health surveys for large-scale farms. PX4 mission planner, 4-band NDVI capture, field-level health maps — flagged stressed zones across 320ha before they were visible from the ground.
Stressed crops, invisible
until it's too late.
Large-scale farms were scouting on foot or by tractor — a process that covered maybe 20ha a day and spotted stress only after it was visible to the naked eye. By then, the window for intervention had often already closed.
The brief: fly autonomous multispectral surveys over entire fields, generate NDVI health maps before stress is visible, and surface the exact zones that need agronomist attention — so inputs go where they matter, not everywhere.
Weekly maps,
automated end-to-end.
Multispectral Capture Pipeline
A PX4-based fixed-wing airframe flies pre-mapped grid patterns at 120m AGL, capturing 4-band imagery (Red, Green, Red-Edge, NIR) with a radiometrically calibrated multispectral camera. A reflectance panel calibration shot is taken before each flight and applied in post-processing to ensure comparable results across seasons.
MAVSDK handles mission upload and telemetry; a custom ROS 2 node monitors the payload sensor and re-triggers if any frame falls below confidence thresholds.
NDVI Map Generation
Raw imagery is processed on an edge server running OpenDroneMap + custom Python pipelines that compute NDVI, NDRE, and GNDVI indices per pixel. The resulting rasters are tiled into a web map and thresholded into zone classifications — healthy, watch, stressed, critical.
Agronomists receive a zone report with GPS coordinates of every stressed area, ready to load into their prescription mapping software for variable-rate input application.
per flight.
capture.
than foot scouting.
before visible.
Fly the field,
read every pixel.
Mission grid, live telemetry, NDVI heatmap, zone classification, and prescription export — the full precision-ag pipeline.
Field boundary → auto-generated grid at optimal overlap and altitude.
Live position, battery, and sensor status across the flight.
Full-field NDVI map generated on-site after landing.
Healthy, watch, stressed, critical — every zone GPS-located.
Zone coordinates exported for variable-rate input application.