Photogrammetry
Why Your Drone Map Looks Warped: The Doming Effect Explained
The drone map doming effect causes systematic elevation errors up to 13 ft — and the orthomosaic looks fine. Here's how to detect, fix, and prevent it.
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Tag Archive
GCP
4 articles on GCP. Field-tested methodology from a GIS scientist with M.S. GIS, FAA Part 107, and 10+ years of geospatial work.
Survey Accuracy
Reading a Drone Mapping Quality Report — Pix4D & Metashape
The drone mapping quality report looks reassuring — until a client finds 8-inch errors. Learn to read every Pix4D and Metashape number before delivery.
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Survey Accuracy
Checkpoints vs Control Points in Drone Survey Accuracy
GCP residuals measure fit, not accuracy. Drone survey checkpoints provide independent validation. How to set them up in Pix4D, Metashape, WebODM.
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Field Operations
GCP Deployment Checklist: From the Truck to First Flight
GCP deployment checklist: placement, measurement procedure, photo documentation, field logging. Every step from planning through pre-flight.
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