Sensor	Flight Altitude
Sentera Double 4K - Analytics	150ft
DJI Mavic 2 Pro	50 ft
DJI Phantom 4 Pro V2	50 ft
DJI Mavic 3 Enterprise	50 ft

iOS Device

Mobile Stand Count only works on iPads . The newer the iOS device, the faster Stand Counts will process.  You will also need a microSD card adapter that is compatible with your iPad.

Crop Types

1. Corn
   
2. Cotton
   
3. Potato
   
4. Soybeans
   
   

Crop Size

Plants should be at least 4 inches leaf across, leaf tip to leaf tip. Rowfill mode will be used when plants within a row are touching. Stand Counts can not be performed when the space between rows is covered by crop canopy.

Uploading (*online connectivity)

The iPad that is generating Mobile Stand Counts must be connected to the internet in order for Stand Count results to be uploaded to the cloud and accessible on the Web and Desktop. A field must also be selected when running Stand Counts so that the Stand Counts have somewhere to upload. File sizes on Stand Counts are designed to be extremely small, so as not to interfere with low data caps or connections in areas with slow connectivity.

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How to use

Flight Planning for DJI Drones on FieldAgent Mobile

After setting an area or line, and camera: 

Choose the Stand preset. This will set the correct altitude for your camera and set the overlap to capture at ~1 stand count per acre.

The boundary buffer for Stand Counts is set to 100ft. This will cause Stand Counts over small fields (less than 50 acres) to have much less than one Stand Count per acre. Lowering the boundary buffer (as it is safe to do so) will allow the drone to fly closer to the edges of the field and thus capture more of the field.

 WARNING: DJI Mavic and Phantom drones are set to fly at 50 feet in order to collect the imagery with the correct resolution. Use caution when flying at low altitudes.

Non-Flat Terrain and Obstacles

When flying over non-flat terrain, Terrain Informed  Flight Planning should be turned on as well. Note that while processing Mobile Stand Counts does not require an internet connection, planning a terrain informed flight DOES require an internet connection.

WARNING:  Concave flight boundaries with surrounding trees should be replanned as line missions.

Look closely at planned flight routes before pressing launch. Some flight patterns over concave flight boundaries may cut through the boundaries. Cutting through the boundary is the most efficient path, but not the safest.

To solve this problem, clear the flight plan and, in the order the drone can safely fly, select all the locations where you would like to capture an image for Mobile Stand Count. Planning flights in this manner also makes it less likely that images are captured over areas where a Stand Count may not be possible (i.e., over terracing or irrigation channels). See below for an example of a custom planned line flight that ensures the drone will not cross over trees while capturing photos.

Running Mobile Stand Count

1. After flight, remove the SD Card from your sensor or drone and insert into an SD card reader attached to your iOS device. 

2. From the Home Screen, tap the menu option for Dashboard and select Review Drone Imagery

3. Select Allow Access.

4. When prompted, select the SD Card in the finder window and then click  Done .  FieldAgent will automatically search the SD Card for flights. Flights will be organized by date and time with the most recent flights on top.

Unless necessary, select the SD Card name and not a lower level folder.

5. Confirm the properties and edit as necessary.

Uploading results to the cloud requires a field selection. Click Field and choose from your list of fields. You may need to switch organizations to find an existing field. 

6. Once you’ve confirmed the properties, select Start. 

Viewing and Analyzing Results

Progress Bar

A progress bar at the bottom of the screen provides an estimate for how much time remains in processing the selected Mobile Stand Count images.

Numbered Discs

As images are processed, discs will appear on the screen in place of the white photo-dots at each image location.

Each Stand Count disc displays the detected number of plants per acre and is colored according to how that number compares to the other Stand Counts on the screen. Dark green indicates a higher Stand Count, red indicates a lower Stand Count.

Recoloring of discs happens in real time. In the example below, a Stand Count in the lower right turns from red to orange as more images are processed.

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The discs can be selected to preview the image at that location. Select a disc and then press the magnifying glass to preview the annotated image at that location full screen.

                                     

PDF Report

Stand Counts can be shared as a PDF report after processing.

Accessing Previously Created PDF Reports

1. Click on the gear settings icon from any page in the mobile app and then My Past Surveys .

2. Select My Stand Counts.

4. Share the report using the share icon in the lower right corner.

Sharing to the Cloud

Underlying images will not be uploaded to the cloud. Make sure you import your images to FieldAgent to save and sync the data.

Access Stand Counts generated by FieldAgent Mobile in the Web or Desktop by visiting the field page that the Stand Count was associated with and viewing the map layers.