KEPCO Mangilao Solar Farm ALTA Survey

Provide drone-based topographic data for ALTA Survey

Client

KEPCO, Samsung & TG Engineers

Project Type

Topographic Mapping

Location

Mangilao, Guam

Project Overview

As the KEPCO Mangilao Solar Farm reached completion, Korea Electric Power Corporation (KEPCO) required an ALTA (American Land Title Association) survey to document the final site conditions with high-precision topographic data. To meet this need, 2cofly partnered with TG Engineers to conduct a comprehensive LiDAR-based aerial survey, ensuring accuracy and efficiency in the final site assessment.

Using drone-mounted LiDAR technology, we captured detailed elevation and land surface data, allowing engineers to seamlessly integrate the final survey results into their engineering and development plans.

The Challenge

An ALTA survey requires precise, high-resolution data to meet stringent engineering and land title standards. Given the size and complexity of the solar farm, traditional ground-based surveying would have been time-consuming and labor-intensive. KEPCO needed a faster, scalable solution that could provide the necessary accuracy without delaying the project’s finalization.

Drone-based LiDAR surveying offered the ideal solution, as it allowed us to:

Capture terrain details with centimeter-level accuracy
Cover large areas efficiently, reducing survey time
Generate engineering-grade deliverables for post-construction assessment

Approach & Methodology

LiDAR-Based Data Collection

2cofly deployed a high-resolution LiDAR sensor to scan the solar farm’s terrain, generating a dense 3D point cloud that accurately represented ground elevation, site structures, and terrain variations.

Collaboration with TG Engineers

To ensure survey-grade accuracy, TG Engineers provided ground control points (GCPs) for georeferencing, aligning the LiDAR data with precise coordinate systems required for ALTA compliance.

Deliverables Provided

3D Point Cloud – High-density elevation data for accurate topographic modeling
Digital Elevation Model (DEM) – Terrain representation for engineering assessments
1’ Contour Map – Standardized elevation contours for land analysis
High-Resolution Orthomosaic Map – Aerial imagery providing a comprehensive, georeferenced view of the solar farm

Results & Project Impact

Efficient & Accurate Survey Completion

By utilizing drone technology, 2cofly and TG Engineers completed the ALTA survey in a fraction of the time required by traditional methods, reducing both cost and labor efforts.

High-Quality Engineering Data

The LiDAR-derived dataset provided engineers with the precision required for further land assessments, compliance reports, and infrastructure planning.

Conclusion

This project demonstrates the value of drone-based LiDAR surveying in large-scale renewable energy projects. By leveraging advanced aerial mapping techniques, TG Engineers in partnership with 2cofly provided KEPCO with a fast, accurate, and efficient ALTA survey solution, ensuring seamless post-construction documentation and compliance.

For engineering firms, energy developers, and infrastructure planners requiring high-precision surveying, LiDAR mapping, or site assessments, 2cofly delivers industry-leading drone solutions tailored to your project needs.

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: