Survey Accuracy
RMSE Explained for Drone Surveyors: What the Number Means
RMSE drone mapping explained: what the formula means, why vertical is always worse, CE90/LE90 conversions, NSSDA statements, when it's good enough.
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Tag Archive
ASPRS
3 articles on ASPRS. Field-tested methodology from a GIS scientist with M.S. GIS, FAA Part 107, and 10+ years of geospatial work.
Survey Accuracy & GCPs
Drone Survey Positioning: GPS vs RTK/PPK vs GCPs Explained
Four positioning tiers for drone surveys: GPS, RTK/PPK, GCPs, and full RTK+GCPs+checkpoints. Match accuracy to the job — not every project needs the top tier.
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Survey Accuracy & GCPs
Drone Survey Accuracy: RMSE, CE90, LE90, ASPRS Standards (2026)
Real drone survey accuracy in 2026: ±2–5 cm horizontal, ±3–12 cm vertical typical. RMSE vs CE90 vs LE90 explained, ASPRS classes, 5 red flags in any quality report.
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