In the world of drone surveying, accuracy is paramount. At Drone Solutions Ireland, we leverage advanced technologies to ensure our aerial data is as precise as possible. This blog will delve into how we use GNSS Rovers to set Ground Control Points (GCPs), the role of Trimble services, and how our DJI Enterprise drones achieve 1cm accuracy with Real-Time Kinematic (RTK) technology.
Setting Ground Control Points with GNSS Rovers
Ground Control Points (GCPs) are essential for enhancing the accuracy of drone surveys. These are well-defined points on the ground with known coordinates, which help in aligning the aerial imagery with real-world locations. Here’s how we set them up:- Selecting Locations: We begin by choosing strategic locations for our GCPs. These points are evenly distributed across the survey area, ensuring they are visible from the air and have an unobstructed view of the sky
- Using GNSS Rovers: Our GNSS Rovers, equipped with high-precision receivers, are used to measure the exact coordinates of each GCP. This process involves placing the rover on the GCP and recording its position, ensuring centimeter-level accuracy
- Marking GCPs: We use highly visible markers, such as black and white targets, to ensure they are easily identifiable in the drone imagery. These markers are securely placed to prevent any movement during the survey
Leveraging Trimble Services for Enhanced Accuracy
Trimble services play a crucial role in our workflow. Here’s how:- Calibration and Maintenance: Regular calibration and maintenance of our GNSS equipment are essential for maintaining accuracy. Trimble’s network of authorized service providers ensures our equipment is always in top condition
- Technical Support: Trimble offers comprehensive technical support, helping us troubleshoot any issues that arise during our surveys. This support is invaluable in ensuring our operations run smoothly
- Advanced Positioning Solutions: Trimble’s advanced positioning solutions, including their correction services, enhance the accuracy of our GNSS measurements, ensuring our GCPs are precisely located
Achieving 1cm Accuracy with DJI Enterprise Drones
Our DJI Enterprise drones, equipped with RTK technology, offer unparalleled accuracy. Here’s how we achieve this:- RTK Technology: Real-Time Kinematic (RTK) technology allows our drones to achieve centimeter-level accuracy by correcting GNSS errors in real-time. This involves using a base station that communicates with the drone, providing real-time corrections
- Reduced Need for GCPs: While GCPs are still important, RTK technology reduces the number of GCPs needed, making the survey process more efficient
- Post-Processing Kinematic (PPK): In addition to RTK, we use PPK to further enhance accuracy. This involves post-processing the GNSS data collected during the flight, ensuring any remaining errors are corrected