Plot Stand Count and Uniformity provides plot-level measurements of early season crop performance including measurements of stand count and related uniformity measurements. This product utilizes a precision-aligned orthomosaic derived from high-resolution RGB imagery. Specific deliverables for this product are crop dependent.
Recommended Use Cases
Plant Population
Seedling Emergence
Seed Vigor
Plant Uniformity
Stand Quality
Plant Growth
Plant Size
Canopy Development
Weed Pressure
Yield Potential
Plot Quality
Plot Deactivation
Area of Interest Variability
Supported Crops
Corn/Maize
Soybean
Cotton
Canola/OSR
Deliverables Summary
Mosaic RGB Precision Aligned
Plot Stand Count and Uniformity
Requirements
General Requirements
Imagery collected following all “Data Capture Requirements”
Imagery uploaded to the FieldAgent Field created by Plot Project Setup (71200-00)
Order Analytics submitted for Plot Stand Count and Uniformity for uploaded Survey
Row spacing greater than 10 inches (25 centimeters)
Planting information provided: Seeding rate, Row spacing, Number or rows per plot
Data Capture Requirements
Imagery Type
Visual RGB
Ground Sample Distance
Less than 0.5cm
Timing by Crop
Crop ✥
Timing/Growth Stage
Plant Size
Corn/Maize†
V2-V3 or V4-V5
Greater than 4 in. (10 cm) across, from leaf tip to leaf tip
Soybean
V2-V3
Greater than 4 in. (10 cm) across, from leaf tip to leaf tip
Cotton
5-6 Leaf Stage
Greater than 4 in. (10 cm) across, from leaf tip to leaf tip
Small Grain☨
–
–
Canola/OSR
5-6 Leaf Stage
Greater than 4 in. (10 cm) across, from leaf tip to leaf tip
Flight Specifications
Sensor
Altitude
Speed
Overlap
Flight Direction
Buffer
Heading
Gimbal Pitch
Terrain Informed
Double 4K (Ag+)
50ft (16m)
6mph (3ms)
75%
Any
40ft (12m)
Forward
-90° (Nadir)
On
Double 4K (Multispectral)
50ft (16m)
6mph (3ms)
75%
Any
40ft (12m)
Forward
-90° (Nadir)
On
Phantom 4 Pro
50ft (16m)
4mph (2ms)
75%
Any
40ft (12m)
Forward
-90° (Nadir)
On
Phantom 4 RTK
50ft (16m)
4mph (2ms)
75%
Any
40ft (12m)
Forward
-90° (Nadir)
On
Zenmuse X4S
50ft (16m)
4mph (2ms)
75%
Any
40ft (12m)
Forward
-90° (Nadir)
On
Zenmuse X5S
50ft (16m)
4mph (2ms)
75%
Any
40ft (12m)
Forward
-90° (Nadir)
On
6X
70ft (21m)
6mph (3ms)
75%
Any
40ft (12m)
Forward
-90° (Nadir)
On
6X Thermal
70ft (21m)
6mph (3ms)
75%
Any
40ft (12m)
Forward
-90° (Nadir)
On
Sony a7R IV
70ft (21m)
6mph (3ms)
75%
Any
40ft (12m)
Forward
-90° (Nadir)
On
65R
100ft (30m)
10mph (5ms)
75%
Any
40ft (12m)
Forward
-90° (Nadir)
On
Zenmuse P1 (35mm)
70ft (21m)
7mph (3ms)
70%
Any
40ft (12m)
Forward
-90° (Nadir)
On
Mavic 2 Pro
50ft (16m)
3mph (1.5ms)
75%
Any
40ft (12m)
Forward
-90° (Nadir)
On
Mavic 3 Enterprise
50ft (16m)
6mph (3ms)
75%
Any
40ft (12m)
Forward
-90° (Nadir)
On
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
Analytic by Crop
Analytic
Corn/Maize†
Soybean
Cotton
Small Grain☨
Canola/OSR
Mosaic RGB Precision Aligned (82001-01)
X
X
X
X
Plot Stand Count and Uniformity (83001-00)
X
X
X
X
Plot Stand Count and Uniformity – Individual
X
Plot Stand Count and Uniformity – Rowfill
X
X
X
X
Analytic by Imagery Type
Analytic
Visual RGB
Mosaic RGB Precision Aligned (82001-01)
X
Plot Stand Count and Uniformity (83001-00)
X
Mosaic RGB Precision Aligned (82001-01)
Description
A Visual Red, Green, and Blue (RGB) multi-band mosaic provided at native resolution and georeferenced.
Deliverable List
Deliverable
Format
Description
Mosaic: RGB (Preliminary)*
GeoTiff
Visual RGB multi-band, native resolution, and non-georeferenced raster
Mosaic: RGB
GeoTiff
Visual RGB multi-band, native resolution, and georeferenced raster
Data Attributes
Plot Stand Count and Uniformity (83001-00)
Description
Provides either absolute plant count or a relative plant count using percent rowfill based on planting population as well as related uniformity statistics including plant population, gap analysis, seed spacing, singulation/skips/multiples, canopy cover, and weed cover. Data are summarized and provided on a per plot basis.
Deliverable List
Deliverable
Format
Description
Plot Stand Count and Uniformity – Individual*
Shapefile, GeoJSON, CSV
Plot-level summary statistics
Plot Stand Count and Uniformity – Rowfill*
Shapefile, GeoJSON, CSV
Plot-level summary statistics
Data Attributes
Plot Stand Count and Uniformity – Individual
Attribute
Description
Units Metric
Units Imperial
Seeding Rate – User Provided
Seeding rate (user provided input)
count per hectare
count per acre
Plant Density
Stand count of the plot measured in plants per acre/hectare
count per hectare
count per acre
Emergence
Emergence percentage
percent
percent
Seed Spacing – Expected
Seed Spacing expected based on the user inputs of seeding rate and row spacing
cm
in
Seed Spacing – Median
Seed spacing median. Metric is calculated from spacing of emerged plants (If a seeding rate is not provided, the median seed spacing will be substituted for calculations requiring this input)
cm
in
Seed Spacing – Average
Seed spacing average. Metric is calculated from spacing of emerged plants
cm
in
Seed Spacing – Std. Dev
Seed spacing standard deviation. Metric is calculated from spacing of emerged plants
cm
in
Seed Spacing – CoV
Seed spacing coefficient of variation. Metric is calculated from spacing of emerged plants
unitless
unitless
Singulation
Estimated percentage of singulation. Singles are plants that are > 0.5x and < 1.75x the expected seed spacing away from any other plant
percent
percent
Skips
Estimated percentage of skips. Skips are gaps between plants that are > 1.75x and < 5x the expected seed spacing
percent
percent
Multiples
Estimated percentage of multiples. Multiples are plants that are closer than 0.5x the expected seed spacing to another plan
percent
percent
Gaps > 5x Seed Spacing
Estimated percentage of gaps that are more than 5x the expected seed spacing
percent
percent
Plant Surface Area – Median
Plant surface area median
cm^2
in^2
Plant Surface Area – Average
Plant surface area average
cm^2
in^2
Plant Surface Area – Std. Dev.
Plant surface area standard deviation
cm^2
in^2
Plant Surface Area – CoV
Plant surface area coefficient of variation
unitless
unitless
Plant Width – Median
Plant width median
cm
in
Plant Width – Average
Plant width average
cm
in
Plant Width – Std. Dev.
Plant width standard deviation
cm
in
Plant Width – CoV
Plant width coefficient of variation
unitless
unitless
Crop Canopy Cover
Percent of the plot covered by vegetation on the row
percent
percent
Total Vegetation Cover
Percent of the plot covered by all vegetation
percent
percent
Weed Cover
Vegetation between rows (“Total Vegetation Cover” – “Crop Canopy Cover”)
percent
percent
Absolute Plant Count
Number of plants counted in the plot
count
count
Row “X” – Plant Count
Number of plants on the row specified by id X
count
count
Row “X” – Emergence
Percent of vegetation on the row specified by id X
percent
percent
Plot Stand Count and Uniformity – Rowfill
Attribute
Description
Units Metric
Units Imperial
Seeding Rate – User Provided
Seeding rate (user provided input)
count per hectare
count per acre
Plant Density
Stand count of the plot measured in plants per acre/hectare
count per hectare
count per acre
Emergence
Emergence percentage
percent
percent
Rowfill
Percent of the row intersecting vegetation only
percent
percent
Gaps > 5x Seed Spacing
Estimated percentage of gaps that are more than 5x the expected seed spacing
percent
percent
Row Width – Median
Plant width median
cm
in
Row Width – Average
Plant width average
cm
in
Row Width – Std. Dev.
Plant width standard deviation
cm
in
Row Width – CoV
Plant width coefficient of variation
unitless
unitless
Crop Canopy Cover
Percent of the plot covered by vegetation on the row
percent
percent
Crop Canopy Closure
Percent of the canopy closure (only considers areas where crop is present)
percent
percent
Total Vegetation Cover
Percent of the plot covered by all vegetation
percent
percent
Weed Cover
Vegetation between rows (“Total Vegetation Cover” – “Crop Canopy Cover”)
percent
percent
Estimated Plant Count
Estimated number of plants counted in the plot
count
count
Row “X” – Estimated Count
Number of plants on the row specified by id X
count
count
Row “X” – Emergence
Percent of vegetation on the row specified by id X
