Using Pix4Dmapper Ag
to create prescriptions
Pix4Dmapper Ag is a powerful image processing program that can transform an eBee Ag's images into geo-referenced index maps, used in turn to create application maps and exportable prescriptions. Here's how it works...
Pix4Dmapper Ag is an option with every eBee Ag drone
01. Create a quick NDVI map in the field
Generate a low-resolution NDVI map of your crops while in the field.
Simply open the eBee's supplied eMotion software on your Windows tablet or laptop, build a project using the drone’s geo-tagged images, and open the project in Pix4Dmapper Ag to run a rapid analysis and generate your map.
02. Match NDVI with ground observations
Open the GeoTIFF or GeoJPEG version of your map on any GPS-enabled device to start digesting these first results; green signifies higher NDVI values (strong vegetation), red highlights areas of lower values (not so good).
Use this map to guide your manual scouting, walking the field, making observations and possibly collecting samples in order to accurately identify and quantify problem areas.
03. Generate a reflectance map
Back in the office, after fully processing your flight’s images, open Pix4Dmapper Ag's built-in Index Calculator.
Use this tool to generate a more detailed reflectance map before defining different crop regions — these might be fields of different crops, different varieties or different parcels of the same field.
04. Apply algorithms to analyse crop health
Choose the vegetation index you prefer, then apply this algorithm to the regions you created in order to assess plant health.
Pix4Dmapper Ag's Index Calculator automatically includes the Normalized Difference Vegetation Index (NDVI), or you can add your preferred alternative such as the Soil Adjusted Vegetative Index (SAVI), the Modified Simple Ratio (MSR), or even your own custom formula.
The Index Calculator then displays the visual results of this calculation, in the form of an index map, on the left of the screen. It also automatically divides each region into five index value classes for simple differentiation and treatment.
05. Define amounts
With an accurate index map to hand, plus your ground observations and any relevant test results, it’s time to create your custom prescription.
This prescription might refer to how many pounds or kilos of fertiliser, pesticide, or herbicide you will apply to a particular classified zone, or even the seeding rate you will direct your planter to plant. You decide this, based on your knowledge and experience. Plus, you can add a description alongside each rate to note down units, observations, results etc.
06. Export & use your application map
Click Export to create an application map in shapefile (SHP) format, then put this data to work.
You can load this file directly into your tractor’s console, open it in your preferred farm management information system (FMIS)—either on your PC or in the cloud—or even email it to your agronomist. The choice is yours.