Project Overview

Aerial imagery provides a high level of detail for site monitoring, but an orthomosaic map takes it a step further, offering a highly accurate, georeferenced 2D representation of a site. Unlike standard aerial photos, an orthomosaic map is corrected for terrain relief and camera tilt, ensuring a uniform, scaled, and distortion-free visualization.

For this progress monitoring project, 2cofly was tasked with tracking demolition progress over a period of eight months. To achieve consistent and precise overlays, our team implemented ground control points (GCPs) to ensure all data was aligned within the same coordinate system. This allowed for accurate comparisons over time, helping stakeholders track changes with confidence.

What is an Orthomosaic Map?

An orthomosaic map is a high-resolution, georeferenced 2D map created by stitching together hundreds or thousands of aerial images using photogrammetry software. Unlike a standard aerial photo, this map is:

• Uniformly scaled, so distances and measurements are accurate

• Georeferenced, meaning it can be used in GIS software or overlaid with other datasets

• Corrected for distortion, so every point is viewed as if looking straight down

When combined with ground control points, orthomosaic maps become highly accurate tools for measurement, planning, and historical documentation.

Use Cases & Benefits

1. Real-Time Data for Stakeholders With frequent site updates, stakeholders—both local and remote—had access to the most current site conditions without physically being on-site.

2. Historical Documentation By collecting 2-3 maps per week, we created a comprehensive visual record of the site’s progress, allowing teams to review past conditions, verify completed work, and resolve disputes if needed.

3. Planning & Coordination Managers used the orthomosaic maps for daily site planning, team updates, and virtual collaboration. The ability to annotate and share maps improved decision-making and streamlined project coordination.

4. High-Precision Measurements Since the maps achieved absolute and relative accuracy, users could measure linear distances, surface areas, and volumetric calculations with confidence—critical for as-built vs. as-designed comparisons.

5. Progress Analysis & Deadline Tracking With frequent data collection, project managers could analyze work completed, determine if deadlines were on track, and make real-time adjustments as needed.

6. Marketing & Reporting With an extensive collection of high-resolution, up-to-date maps, the client had visually compelling documentation that could be used for marketing materials, investor reports, and client presentations.

Our Approach & Technology

Drone-Based Data Collection

2cofly utilized a high-precision mapping drone equipped with Propeller AeroPoint 2 ground control units, ensuring all datasets were tied to a known reference point for seamless overlays and engineering-grade accuracy.

Frequent Data Updates

Over the course of eight months, we conducted 2-3 aerial surveys per week, maintaining a consistent record of site changes and demolition progress.

Geospatial Accuracy & Integration

By incorporating GCPs and a uniform coordinate system, all maps were seamlessly overlaid onto previous datasets, allowing for precise comparative analysis over time.

Conclusion

This progress monitoring project showcased the power of drone-based orthomosaic mapping in construction, demolition, and site development. By leveraging high-accuracy aerial surveys, 2cofly provided real-time data, historical documentation, and actionable insights that improved project efficiency, planning, and decision-making.

For companies requiring orthomosaic mapping, LiDAR surveys, or aerial site documentation, 2cofly offers customized drone solutions that enhance workflow efficiency and data accuracy.

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