This guide defines Real-Time Kinematic (RTK) and Post-Processed Kinematic (PPK) technologies to help you choose the best high-accuracy workflow for your project.
Overview of high-accuracy positioning
To achieve sub-inch or centimeter-level precision, DroneDeploy utilizes RTK and PPK GPS methods. These technologies mitigate atmospheric and satellite clock errors to provide reliable data insights.
Real-Time Kinematic (RTK)
RTK provides instantaneous centimeter-level positioning by receiving correction data from a base station or network during flight.
Key Features:
Streamlines precise drone location determination in real-time
Empowers immediate adjustments for construction site analysis or infrastructure inspection
Reduces data uncertainty by mitigating atmospheric interference immediately
Limitations:
Obstacles or specific atmospheric conditions can disrupt correction signals.
The drone requires a constant radio or internet link to a base station or NTRIP network throughout the flight.
Post-Processed Kinematic (PPK)
PPK achieves high accuracy by processing GPS data after the flight concludes. The system compares drone observations with reference station measurements to calculate precise coordinates.
Key Features:
Enables drone operations across vast areas or remote locations without a constant data link
Leverages existing reference station networks to reduce on-site infrastructure needs
Provides robust results for missions exceeding 10 minutes
Limitations:
Definitive location data requires post-processing, which adds approximately 15 minutes to the workflow.
The system relies on the availability of accurate reference data from regional networks.
Auto-PPK is optimized for the United States (US) and European Union (EU).
Making the optimal choice
Select the technology that best fits your project requirements and operational environment.
| Choose RTK for: | Choose PPK for: |
|---|---|
| Mission-critical projects demanding real-time feedback | Mapping large areas or remote locations |
| Operations within range of a reliable base station | Cost-sensitive projects with minimal infrastructure |
| Applications where minimizing processing delays is crucial | Missions where real-time location is not essential |
Frequently Asked Questions (FAQs)
Q: Do I still need Ground Control Points (GCPs)?
A: While PPK and RTK maps are significantly more accurate than standard GPS maps, we recommend using GCPs for projects requiring the highest level of absolute accuracy. Always use checkpoints to verify map accuracy.
Q: Does PPK work with the Skydio X10?
A: Yes. DroneDeploy processes data from the Skydio X10 and automatically applies PPK corrections if you fly with the RTK module attached.
Q: What happens if I lose my internet connection during an RTK flight?
A: RTK requires a continuous connection. If the connection drops, the system stops receiving corrections. For areas with spotty service, we recommend using a PPK workflow instead.
For more information on high-accuracy workflows, see our PPK Accuracy Best Practices and RTK Accuracy Best Practices articles.
V2.2