Spot Spraying with PIX4Dfields

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Information: The following article describes a workflow of how to perform spot spraying using PIX4Dfields features. The workflow can also be used to create a granular application or seeding application. The workflow uses DJI AGRAS Spraying Rx as an example. However, this can also be applied to any drone that supports PIX4D's output formats (Shapefile (.zip), KML, GeoJSON).

Tip: The following video explains step-by-step how to use PIX4Dfields to generate maps for spot spraying applications.

Fly the field with the drone of choice at desired crop stage or to capture current issues in the field.
Login to PIX4Dfields. For more information: PIX4Dfields login.
Click on New Project .
Click on Import images or Import folder.
Select the Processing Options depending on the dataset. For more information: Advance processing options in PIX4Dfields.
Click Apply.
Click Start processing.
When complete, if no field boundary is previously loaded, import, or draw a boundary around the current crop area. For more information: How to create field boundaries in PIX4Dfields.
Using the boundary, trim the orthomosaic. See: How to create field boundaries in PIX4Dfields.
Trim an orthomosaic using a field boundary.

Trim an orthomosaic using a field boundary.
Select an available index or use the index calculator to generate a custom index. For more information: How to generate a vegetation index in PIX4Dfields.
Click Generate.
Load selected index (such as NDVI)> click on Visual
Use the advanced layer visualization tool to find the AOI by changing range, transparency, and color mode. See How to use advanced layer visualization in PIX4Dfields.

Identify AOI using the advanced layer visualization tool.
Once selected areas of fields are isolated, switch to annotations .
Draw polygons around areas of issues that are targeted for spraying with the product. See: How to use annotations in PIX4Dfields. Trial plot operations

Tip: Avoid sharp corners and no overlapping boundaries. Use as few vertices as possible.

Not recommended shapes.

Recommended shapes.
Once complete, click on ANNOTATE and click on Export.

Export AOI as a .shp.
ClickAnnotations> Select Shapefile (.zip) as format.
Click Export.
Once the shapefile is exported to a zipped folder, insert a micro-SD card. Create a new folder called “DJI” and a subfolder called “shapefile”.
Unzip the exported folder onto the root of the USB ROOT/DJI/shapefile/.

Add a PIX4Dfields shp to an SD card.
Remove the USB, insert it into the DJI controller. Power on the controller.
Click on the SD Card, choose “boundaries”.

Insert USB/SD card into DJI controller.

Select the boundaries created on PIX4Dfields.
Select the proper area to target spraying and click Invoke.

Select area to spray.
Set desired flight parameters, load desired product, and apply to field zones.