How to Export Corrected Image Geotags from the PPK Workflow

Propeller's Phantom 4 RTK/PPK package allows you to export PPK-corrected image geotags for use in third-party photogrammetry software.

Prerequisites

Propeller PPK supported drone
Imagery collected by your drone on an SD card
SD card reader/adapter
At least one AeroPoint
Active Propeller PPK subscription

Before you start

Upload an AeroPoint survey for the site you have flown.

Note: The capture will need to be unprocessed.

If you have already processed your AeroPoints survey, you can duplicate the original by clicking on the three vertical dots in the top right-hand corner.

Processing Instructions

1. Navigate to your AeroPoints Dashboard.

2. Select the unprocessed AeroPoints survey associated with your PPK drone flight and click PROCESS NOW.

AeroPoint Survey Process Now.png

3. Choose the appropriate processing method for your AeroPoints survey. If you're processing data with a published coordinate system and your survey site is within the Propeller Corrections Network, choose the Propeller Corrections Network. If you're processing data with a Local Site coordinate system, choose the Local Site Survey Benchmark and enter the required known point information.

Note: To use the Local Site Survey Benchmark method, you must first create a local site using the site calibration file. Learn more about setting up the local site using the Topcon .gc3 or Trimble JXL files.

4. Before you click PROCESS NOW, navigate to the bottom of your screen, click Add PPK Drone Data, and drag and drop your JPG images and GPS observation data files from the SD card. If you conducted a multi-battery mission, ensure that you include all the flight folders.

5. Click PROCESS and wait for the results.

If you are using the corrections network, it may take up to 24 hours after your flight for the corrections data to become available.

Downloading PPK geotags

Once the PPK corrections are complete, you can download the PPK geotags.

1. Navigate to and open the processed AeroPoint survey.

2. Open the Coordinate Systems section and ensure the units are set to meters. This is the standard unit photos are geotagged with.

AeroPoint Survey Change Measurement Unit.png

3. Scroll to the bottom of the survey to the 'PPK Image Tags' section.

4. Change the format to Geodetic (Decimal). This will provide the longitude, latitude, and ellipsoid height tags, which is the standard for drone geotags.

5. Download your PPK-corrected image geotags by clicking the DOWNLOAD CSV button.

6. Import your PPK-corrected image geotags into your third-party photogrammetry processing software.

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