Construction topographic survey for HQ Development

Conduct topographic survey for a HQ development

Client

Pacific Rim & TG Engineers

Project Type

Topographic Mapping

Location

Dededo, Guam

Project Overview

As part of their new headquarters development, Pacific Rim required a comprehensive topographic survey to support site planning, grading, and infrastructure design. To meet this need, TG Engineers partnered with 2cofly to conduct a high-precision drone survey, utilizing both LiDAR and photogrammetry.

By integrating drone-based surveying with traditional ground control techniques, we provided a highly accurate dataset that enabled the engineering team to proceed with confident planning and precise site development.

The Challenge

Surveying land for large-scale commercial construction requires accurate elevation data to ensure proper grading, drainage, and site optimization. Challenges included:

Ensuring high-accuracy terrain mapping for engineering and construction planning
Reducing survey time while maintaining engineering-grade precision
Providing a cost-effective alternative to full traditional ground-based surveying

Given these factors, a drone-based LiDAR and photogrammetry approach was the ideal solution, allowing us to map the site faster, more safely, and with greater accuracy.

Approach & Methodology

Drone-Based LiDAR & Photogrammetry Survey

✔ LiDAR Scanning – Captured high-density point cloud data, mapping the terrain with centimeter-level accuracy.

✔ Photogrammetry – Produced a high-resolution orthomosaic map for detailed site visualization.

Collaboration with TG Engineers

✔ Ground Control Points (GCPs) – TG Engineers provided survey-grade GCPs to ensure absolute accuracy in all deliverables.

Deliverables Provided

✔ 3D Point Cloud Model – High-resolution elevation data for detailed site analysis

✔ Digital Elevation Model (DEM) – A georeferenced dataset for grading and infrastructure planning

✔ 1’ Contour Map – Essential for drainage and site development planning

✔ High-Resolution Orthomosaic Map – Aerial imagery providing a detailed and accurate site overview

Results & Project Impact

Faster & More Efficient Surveying

By using drones and LiDAR technology, 2cofly completed the survey significantly faster than traditional methods, reducing the project timeline and improving efficiency.

Engineering-Grade Accuracy

The combination of LiDAR, photogrammetry, and ground control verification ensured that the final dataset met industry standards for construction planning.

Optimized Site Planning for Pacific Rim HQ

With a precise topographic dataset, the engineering team could plan grading, infrastructure, and drainage systems with confidence, minimizing potential design errors.

Conclusion

This project highlights how drone-based surveying can significantly improve the speed, accuracy, and efficiency of commercial site development. By combining LiDAR, photogrammetry, and ground control points, 2cofly and TG Engineers provided Pacific Rim with a topographic survey solution that streamlined their headquarters construction process.

For developers, architects, and engineers seeking high-precision topographic mapping for commercial and industrial projects, 2cofly delivers cutting-edge drone surveying solutions to optimize planning and execution.

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: