Broccoli - January 20th, 2024
This survey was of a broccoli field. The DJI Mavic 3T Enterprise drone carried the Survey3W RGN and Survey3W OCN cameras using our DJI Mavic 3 MAPIR Survey3 - Dual 2 Camera Mount, along with the DAQ-A-SD light sensor (spectrometer) and covered the 80 acre field in one battery. Photos of our Diffuse Reflectance Standard Calibration Target Package (T3-R125) were captured just before the flight. The DAQ light sensor was started along with the cameras and logged any light changes. The RAW+JPG Survey3 images and DAQ log were converted and calibrated in our MAPIR Camera Control (MCC, desktop software), and the orthomosaic was produced in Pix4Dmapper.
| Vehicle | DJI Mavic 3T |
| Mount | DJI Mavic 3 MAPIR Survey3 - Dual 2 Camera Mount |
| GNSS (GPS) | DAQ-A-SD |
| Light Sensor (Spectrometer) | DAQ-A-SD |
| Camera(s) |
Survey3W RGN (Red, Green, NIR) Survey3W OCN (Orange, Cyan, NIR) DJI Mavic 3T RGB |
| Height AGL | 400 ft (120 m) |
| GSD (Average) | 1.66 in / 4.21 cm |
| Surveyed Area | 80 acres / 128 acres (planned / actual) |
| Mapping Application | DJI |
| Front Overlap (App Setting) | 80% |
| Side Overlap (App Setting) | 80% |
| Max Flight Speed (App Setting) | 15 m/s (M3T) |
| Pix4D Processing Report | VIEW HERE |
| Download Original RAW+JPG Images (Survey3W RGN) | DOWNLOAD HERE (3.21GB) |
| Download Original RAW+JPG Images (Survey3W OCN) | DOWNLOAD HERE (2.86GB) |
Ambient Light Spectrum (Sunlight)
Calibration Target Automatic Region Sampling
MAPIR Survey3W RGN
MAPIR Survey3W OCN
Orthomosaic Maps
The broccoli is planted such that the left (west) side is the new smaller plants, middle section is medium size, and the right (east) side is larger mature plants. From 400ft (120m) altitude, using wider angle lenses (M3T RGB, Survey3W) makes capturing the reflectance of the smallest plants more difficult. To better capture smaller objects, use our narrower Survey3N and fly lower.
DJI M3T RGB
MAPIR Survey3W RGN (NDVI 0.15-0.80, RGB background)
MAPIR Survey3W OCN (NDVI 0.35-0.85, RGB background)
Example Images
The following images were captured while hovering the drone about 2 meters above the plants.
DJI M3T RGB
MAPIR Survey3W RGN (NDVI 0.15-0.80)
MAPIR Survey3W OCN (NDVI 0.35-0.85)
Left to Right: DJI M3T RGB, MAPIR Survey3W RGN, MAPIR Survey3W OCN
