Drone/UAV Mapping (Photogrammetry)
Using a drone to capture overlapping aerial photographs, then stitching them together with photogrammetry software into an accurate map, 3D model, or [[concept-reality-capture|point cloud]] of a site, commonly used for topographic data, earthwork volume calculations, and ongoing progress documentation.
Why it matters
Measuring a large site's topography or tracking earthwork progress by hand is slow and requires someone physically on the ground at every point measured. Drone mapping captures the entire site at once from the air, turning a task that once took a survey crew days into a flight that takes hours.
On a real project
A drone pilot flies weekly missions over an active earthwork site, and the resulting photogrammetry model lets the project team calculate exactly how many cubic yards of material have been moved that week without a ground crew measuring stockpiles by hand.
Who this matters most to
A Drone/UAV Specialist plans and flies the missions and processes the captured imagery into usable maps and volume calculations. A Surveyor often verifies drone-captured data against ground control points to confirm its survey-grade accuracy before it's used for anything requiring precise measurement.
Where this goes wrong
A project relies on drone-captured earthwork volumes without establishing ground control points to calibrate the data's accuracy. The resulting volume calculations are off by an amount that only becomes apparent when they're compared against a traditional survey later, after decisions were already made based on the uncorrected numbers.