Statistics for Trial Fields and Production Fields
This analytic automatically extracts statistics metrics of any types of raster at the microplot or plot level.
1. Inputs
Statistics for trial field:
- Any rasters (Basic scouting maps, DSM, Reflectance …) *
- Microplots *
- Deliverables suffix
Statistics for production field:
- Any rasters (Basic scouting maps, DSM, Reflectance …) *
- Field boundaries * (How to create a Field Boundaries)
- Deliverables suffix
- Grid Size*
*Mandatory
2. Deliverables
Statistics for trial field:
- indicesname-bandnumber-vectorfileinputsname + suffix.geojson (Ex : NDVI-b1-Microplots Trial.geojson)
- Statistics CSV + suffix.csv
Statistics for production field:
- indicesname-bandnumber-vectorfileinputsname + suffix.geojson (Ex : NDVI-b1-Field Boundaries Production.geojson)
- Statistics CSV + suffix.csv
3. Attributes
Statistics for trial field and production field:
Here are the attributes of the geojson file deliverable:
- Attributes from the input vector file (parent_id, block_plot_id,… if the vector is from Alteia)
- mean: Average value of the pixels inside the geometry
- median: Median of the pixels inside the geometry
- min: Minimum value of the pixels inside the geometry
- max: Maximum value of the pixels inside the geometry
- std-dev: Standard deviation of the pixels inside the geometry
- var: Variance of the pixels values inside the geometry
- count: Number of valid pixels used inside the geometry
- decile_1: decile 1
- decile_2: decile 2
- decile_3: decile 3
- decile_7: decile 7
- decile_8: decile 8
- decile_9: decile 9
- percentile_1: percentile 1
- percentile_5: percentile 5
- percentile_95: percentile 95
- percentile_99: percentile 99
Example for the deciles and percentiles:
- Decile 1 has 10% of the data points below it and has 90% of the data points above it.
- Decile 2 has 20% of the data points below it and has 80% of the data points above it…
- Percentile_1 has 1% of the data points below it and has 99% of the data points above it.
- Percentile_5 has 5% of the data points below it and has 95 % of the data points above it…
The csv file contains the same attributes than the geojson file + the name of the index + the number of the band (b1 by default for single band)
4. Workflow
Step 1: From the survey page, click on “Analytics”, select your category (field experiment or production field), Select “Statistics for trial field” or “Statistics for production field”
Click on Launch
Step 2:
- Select the raster on which you want the statistics
Step 3:
- If you have selected “Statistics for trial field” please select your microplots vector file
If you have selected “Statistics for production field” please select your Field boundaries vector file
Step 4:
- For “Statistics for trial field” please enter a Deliverable suffix
- For “Statistics for production field” please enter a Deliverable suffix and a Grid Size
4. How to use the outputs
If the analytic result vector is displayed it is recommended to display also the scouting map for interpretation.
To display the statistics, go on the layer panel in the Scouting maps statistics. Click on the desired vector to open the info panel on the right. Click on the geometry you wish to know the statistics and open custom properties to display all the attributes of this deliverables.
Statistics can be downloaded and exported in multiple format from the download section (Exporting Data)
Color scale can also be displayed:
