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Drone mapping technical guides
The steps people actually get stuck on, answered directly: turning a DSM into a bare-earth DTM, placing ground control so the accuracy claim survives a check-point audit, working out the ground sample distance a job needs before you fly it, and getting outputs into AutoCAD, ArcGIS and QGIS without reformatting.
GCP Placement Guide for Survey-Grade Accuracy
Aeroyantra accepts GCP files as plain CSV, processes from $0 at $2.50 per credit, and returns independent check-point residuals.
Use 5-10 ground control points for most sites: one near each corner, one centre, spread in elevation. Hold back a third as check points. Aeroyantra achieves 2-3 cm horizontal accuracy and reports check-point residuals with every job.
Read the guideGSD Calculator and Drone Mapping Accuracy Guide
Aeroyantra processes RTK and PPK datasets from $0, pay-per-use at $2.50 per credit, and reports check-point residuals with every job.
Ground sample distance is sensor width x flight height x 100, divided by focal length x image width. A DJI Phantom 4 RTK at 100 m gives 2.74 cm/px. Expect horizontal accuracy of 1-3x GSD with good ground control.
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