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Drone mapping vs total station for our foundation layout in Austin, not even close
We ran both on a 12,000 sq ft slab last month and the drone data was off by nearly 4 inches on one corner, the total station nailed every point in half the time. Are you guys still trusting photogrammetry for anything with a tolerance under half an inch, or is that just asking for rework?
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robin77725d ago
The issue isn't the drone, it's what you're asking photogrammetry to do. It builds a surface from pixels, so a 4 inch miss on a corner is just normal error stacking up from lens distortion, flight height, and ground control that wasn't tight enough. If you flew it with RTK and dropped a dozen checkpoints shot by the total station, you'd probably cut that to an inch or less, but you'd never get to half an inch, and that's the whole point. Photogrammetry is for dirt work, stockpile volumes, and progress shots, not for setting forms or anchor bolts. The total station wins because it measures angles and distances to a prism, not a guess at where a pixel edge is. Use the drone to check your cut and the gun to lay out the points, and stop trying to make one tool do the other's job.
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stone.margaret25d ago
Yep, @robin777 nailed it. Drones are for moving dirt, not for putting bolts where they gotta be.
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