Project Overview

2cofly was hired by 174 Power Global to conduct a low-altitude aeromagnetic survey for a planned solar farm development. The primary objective was to detect and map buried ferrous anomalies, specifically unexploded ordnance (UXOs), while ensuring maximum safety and efficiency.

This project required a multi-phase approach over 180 days, spread across eight months, involving aerial mapping, magnetometry scanning, data processing, and surface clearance. By utilizing drone technology, we provided a faster, safer, and more cost-effective alternative to traditional UXO detection methods.

The Challenge

Traditional UXO detection is a labor-intensive process that requires extensive manual surveying and excavation, often resulting in significant costs and delays. The client required a solution that would expedite data collection while maintaining high accuracy and safety standards.

Before performing the low-altitude magnetometry scans, 2cofly needed to generate a high-resolution orthomosaic map to serve as the base map for flight planning. This additional step ensured that our aeromagnetic survey flights aligned precisely with actual site conditions. This is important when we need to ensure the drone won't run into a fence or trees.

Approach & Methodology

Aerial Mapping & Flight Planning

To establish an accurate reference for the aeromagnetic survey, 2cofly first conducted a detailed orthomosaic survey. This high-resolution base map allowed for precise flight path planning, ensuring comprehensive site coverage during the magnetometry scans.

Drone-Based Magnetometry Scanning

A Sensys R3 magnetometer was mounted on our drone to conduct low-altitude scans of the site. The system was designed to detect ferrous anomalies, including potential buried UXOs, without requiring personnel to traverse hazardous areas. Compared to ground-based detection methods, this approach significantly increased efficiency and reduced operational risk.

Data Processing & Analysis

Following the survey, 2cofly processed the data to produce an anomaly map overlaid onto the orthomosaic map. This visual representation allowed the client to identify and assess areas of concern with precision. Additionally, we provided a detailed Excel report that included:

• Latitude and longitude coordinates for each Target of Interest (TOI)

• Magnetic field strength readings to determine the significance of each anomaly

Surface Clearance

In addition to the aerial survey, 2cofly conducted a site-wide surface clearance to remove any metal objects found above ground, further ensuring the site was safe for construction activities.

Results & Project Impact

Cost Savings & Efficiency

By integrating drone-based magnetometry into the survey, 2cofly saved the client over $1 million compared to traditional UXO detection methods.

Faster Completion Time

The entire project was completed in a fraction of the time that manual ground-based surveys would have required, significantly reducing delays in the solar farm development timeline.

Improved Safety

By eliminating the need for manual fieldwork in potentially hazardous areas, our drone survey approach minimized risk to personnel while maintaining high accuracy and data integrity.

Deliverables & Actionable Insights

The final deliverables included a detailed anomaly map with geospatial overlays, as well as a comprehensive database of TOIs, enabling the client to make informed decisions regarding excavation and land use.

Conclusion

2cofly’s expertise in aerial surveying, magnetometry, and remote sensing provided 174 Power Global with a highly accurate, cost-effective, and safe UXO detection solution. The success of this project highlights the value of drone technology in large-scale infrastructure and energy projects.

For organizations requiring high-precision aerial mapping, UXO detection, or remote sensing solutions, 2cofly offers customized drone services designed to enhance safety, efficiency, and cost-effectiveness.

2cofly (pronounced Ecofly) is Micronesia's leading drone service and education provider. Our core competency lies in remote sensing via various sensing technologies such as photogrammetry, LiDAR, thermal and more.

Few key deliverables we can output with our drones & sensors:

• Orthomosaic Mapping (+ Planimetric Mapping)

• Topographic Mapping (via LiDAR & photogrammetry)

• General LiDAR Mapping (land feasibility study, power line, etc)

• Aerial Inspection

• Aerial Magnetometry (underground metal detection)

• Thermal Map (radiometric)

We are also the largest drone training and education provider, offering:

• Online Course

• In-person workshops

• Custom curriculums for students and professionals

Schedule a free consultation

(671) 988-1532 | dwl@2cofly.com