What Is a Field Scan – And Why It Matters
June 17, 2025Why I Use Drones for Roof Inspections
June 17, 2025A 3D model might start in the air, but the real work happens on the ground — through planning, precision, and detailed data processing.
Capturing the Data
Every scan begins with a carefully planned flight. I fly in overlapping grid patterns, capturing hundreds of high-resolution images with 70–80% overlap. This isn't just point-and-shoot, it ensures every section of the site is covered from multiple angles to give depth, structure, and context.
Processing with Photogrammetry
Once the data is captured, the real work begins. The images are run through advanced photogrammetry software that compares pixel positions, angles, and overlaps. From this, it builds:
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A dense point cloud – millions of reference points
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A 3D mesh – the structure of the terrain or object
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A texture map – for realistic surface visuals
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An orthomosaic – a top-down, geometrically accurate image
This step requires processing power, calibration, and review to avoid errors and gaps, it’s not automatic, and it's not instant.
Accuracy That’s Not Just Visual
These aren’t just 3D pictures. They're scaled and measurable. The models allow for:
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Distance and area measurements
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Height profiles and slope checks
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Volume calculations (ideal for stockpiles, cut/fill analysis)
Everything is grounded in real-world coordinates, making the data practical and ready for use.
Why It Beats Manual Mapping
Compared to traditional mapping, this method offers:
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Complete visual coverage from above
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Centimetre-grade accuracy when configured properly
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No time wasted walking sites, climbing scaffolds, or working around mud and hazards
This process blends flying skill, data science, and technical refinement. That’s what makes it different — and that’s what makes it worth it.
