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Aerial Mapping Drone


Phantom 4 PPK reduces or eliminates the need for ground control.

Phantom PPK PNG 72dpi.png

The Technology

Upgrading your DJI Phantom drone to a PPK (Post-Processed Kinematics) system can significantly improve the accuracy of your drone mapping data. PPK is a positioning technology that involves post-processing the raw GNSS data collected by your drone, using a base station as a reference to achieve highly accurate geotagging of your aerial images.

The PPK does not need a real-time data link with a base station during a flight. All GNSS positioning data are stored on board in the PPK system on the aircraft,so that, after collection, it is post-processed by combining with data from a base station installed near the project site to create high-quality orthomosaic and digital surface models. There is no doubt that it is a good choice for high-precision mapping and photogrammetry jobs.


-Affordable professional-grade survey solution.

-Easy to achieve centimeter accuracy within 5cm.
-No need to dismantle the machine, and the operation is simple.
-It is so light that it has no effect on the original flight time.
-Built-in battery, charging once, it can work for 12 hours.
-The external sensor can intercept the camera trigger signal.
-Easy to use and with free post processing software.
-Without ground image control points, even complex terrain image control points can be reduced by more than 80%.
-The PPK kit can be installed on PHANTOM 4 and Mavic 2 All Series.
-Support for modern mission planning and execution software (Pix4Dcapture, Map Pilot, GS Pro).
-Photogrammetric Product Support: Agisoft Metashape, Pix4Dmapper, Bentley Context Capture.

Here's how the PPK system works:

  1. GNSS data collection: The drone collects raw GNSS data from multiple satellites in the GPS, GLONASS, Galileo, and BeiDou constellations. The raw data includes precise timing information, signal strength, and other parameters.

  2. Base station data collection: A base station on the ground also collects raw GNSS data from the same satellites. The base station is placed in a known location, and its position is precisely known.

  3. Post-processing: Once the drone has completed its flight, the raw GNSS data collected by the drone and the base station are downloaded to a computer for post-processing. A specialized software application is used to perform differential correction, which involves comparing the raw data collected by the drone with the raw data collected by the base station.

  4. Calculation of precise position: Using differential correction, the PPK software calculates the precise position of the drone at each moment of its flight. This position is calculated to within sub-centimeter-level accuracy, making it much more precise than standard GPS or RTK positioning systems.

  5. Geotagging of aerial images: The precise position calculated by the PPK system is used to accurately geotag the aerial images captured by the drone. This means that each image is tagged with the precise location at which it was taken, allowing for accurate mapping and surveying of the area.

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