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Product Specification
Product Name:Plot Canopy Height
Product SKU:71206-00
Revision Date:2024-09-04
Product Overview
Description
Plot Canopy Height characterizes height using 3D reconstruction derived from RGB imagery and is related to measurements of leaf canopy height and can be used to assess growth stage or crop damage. Canopy height represents the distance between the soil and leaf canopy surfaces and in some case may not be the same measurement as plant height (i.e., depending on manual measurement methods). This product utilizes a precision-aligned orthomosaic derived from high-resolution RGB imagery.Recommended Use Cases
- Plant Growth
- Plant Height
- Biomass
- Plot Quality
- Plot Deactivation
- Area of Interest Variability
Supported Crops
- Corn/Maize
- Soybean
- Cotton
- Small Grain
- Canola/OSR
Deliverables Summary
- Mosaic RGB and Elevation (Digital Surface Model) Precision Aligned
- Plot Canopy Height
Requirements
General Requirements
- Requires FieldAgent Enterprise License (61006-##) or Enterprise Analytics Upload/Export Surcharge (71010-09)
- Requires Plot Project Setup (71200-00)
- Imagery collected following all "Data Capture Requirements"
- Imagery uploaded to the FieldAgent Field created by Plot Project Setup (71200-00)
- Contract Defined - Mosaic Based submitted for "Plot Canopy Height (71206-00)" for uploaded Survey
- Alleys (i.e., bare soil) between plots greater than 10 ft (3 m) or a minimum of 12 ground truth measurements captured on the date of the flight to calibrate height results, for larger fields 1 measurment per acre(2 per hectare) is recommended
- Optional: Soil elevation data file from a RTK GPS equipped planter. Ground truth measurements are required when using soil elevation data from a separate source such as RTK GPS equipped planter
- Lidar: Lidar point cloud data with sufficient detail can be used as a subsitite for RGB imagery for canopy height results. When Lidar point cloud data is used, RGB based mosaics will not be included in the product delivery
Data Capture Requirements
Imagery Type
- RGB (Global Shutter)
Ground Sample Distance
- Less than 1.7cm
Timing by Crop
| Crop ✥ | Timing/Growth Stage | Plant Size |
|---|---|---|
| Corn/Maize | V6 to R4 | Greater than 2 ft (0.6 m) height |
| Soybean | V4 to R6 | Greater than 1 ft (0.3 m) height |
| Cotton | After 50% canopy cover | Greater than 1 ft (0.3 m) height |
| Small Grain | After 50% canopy cover | Greater than 1 ft (0.3 m) height |
| Canola/OSR | After 50% canopy cover | Greater than 1 ft (0.3 m) height |
Flight Specifications
| Sensor | Altitude | Speed | Overlap | Flight Direction | Buffer | Heading | Gimbal Pitch | Terrain Informed |
|---|---|---|---|---|---|---|---|---|
| Phantom 4 Pro | 100ft (30m) | 5mph (2m/s) | 85% | Any | 50ft (15m) | Forward | -90° (Nadir) | Off |
| Phantom 4 RTK | 100ft (30m) | 5mph (2m/s) | 85% | Any | 50ft (15m) | Forward | -90° (Nadir) | Off |
| Zenmuse X4S | 100ft (30m) | 5mph (2m/s) | 85% | Any | 50ft (15m) | Forward | -90° (Nadir) | Off |
| Mavic 3 Enterprise | 100ft (30m) | 10mph (4m/s) | 85% | Any | 50ft (15m) | Forward | -90° (Nadir) | Off |
| Mavic 3 Multispectral | 100ft (30m) | 10mph (4m/s) | 85% | Any | 50ft (15m) | Forward | -90° (Nadir) | Off |
| Zenmuse P1 (35mm) | 200ft (60m) | 15mph (7m/s) | 85% | Any | 50ft (15m) | Forward | -90° (Nadir) | Off |
| 65R | 200ft (60m) | 15mph (7m/s) | 85% | Any | 50ft (15m) | Forward | -90° (Nadir) | Off |
Environmental Conditions
Lighting
Imagery should be captured between the time of 2 hours after sunrise and 2 hours before sunset. Consistent lighting conditions required for best results, including avoidance of hard shadows cast over the field which cause bright spots and dark spots in the dataset.Wind
Wind conditions should be within the specified limits of the aircraft or system being used to carry the imaging sensor.Precipitation
There should be no active precipitation during imagery capture.Deliverables
Analytics
| Analytic | Imagery | RGB (Global Shutter) |
|---|---|---|
| Mosaic RGB and Elevation (Digital Surface Model) Precision Aligned (82105-01) | ||
| Plot Canopy Height (83008-00) |
Mosaic RGB and Elevation (Digital Surface Model) Precision Aligned (82105-01)
Description
A Visual Red, Green, and Blue (RGB) multi-band mosaic and an elevation digital surface model (DSM) single-band mosaic provided at native resolution and georeferenced.Deliverable List
| Deliverable | Format | Description |
|---|---|---|
| RGB Mosaic (Preliminary)* | GeoTiff | Visual RGB multi-band, native resolution, and non-georeferenced raster |
| Elevation Mosaic (Preliminary)* | GeoTiff | DSM single-band, full-resolution, and non-georeferenced raster |
| RGB Mosaic | GeoTiff | Visual RGB multi-band, native resolution, and georeferenced raster |
| Elevation Mosaic | GeoTiff | DSM single-band, full-resolution, and georeferenced raster |
Plot Canopy Height (83008-00)
Description
Canopy height summarizes the difference between the digital surface model of the crop canopy from the digital elevation model of the soil surface using photogrammetric reconstruction to determine height within a plot as well as variability of canopy height within a plot. Canopy height typically measures the tops of the crop leaves and dense vegetative areas within the plot. Fine plant features that may stick above the canopy are not necesarily represented in the canopy height measurement (e.g. corn tassels).Deliverable List
| Deliverable | Format | Description |
|---|---|---|
| Plot Canopy Height | Shapefile, GeoJSON, CSV | Plot-level summary statistics |
| Canopy Height | GeoTiff | Canopy height precision-aligned raster |
Data Attributes
Plot Canopy Height
| Attribute | Description | Units Metric | Units Imperial |
|---|---|---|---|
| Canopy Height - Average (m) <DD-Mon> | Average canopy height of the plot | ||
| Canopy Height - Minimum (m) <DD-Mon> | Minimum canopy height of the plot | ||
| Canopy Height - 10th Percentile (m) <DD-Mon> | 10th percentile canopy height of the plot | ||
| Canopy Height - 90th Percentile (m) <DD-Mon> | 90th percentile canopy height of the plot | ||
| Canopy Height - Max (m) <DD-Mon> | Maximum canopy height of the plot | ||
| Canopy Height - Std. Dev. (m) <DD-Mon> | Standard deviation of canopy height of the plot | ||
| Canopy Height - CoV <DD-Mon> | Coefficient of variation of canopy height of the plot |