· Photogrammetry
Metashape Processing Settings: What Each One Actually Does
A practitioner's guide to Agisoft Metashape processing settings: what each quality slider controls, why the tradeoffs matter, and three presets for real jobs.
Drone Mapping · Photogrammetry · LiDAR · GIS
Drone mapping, explained by a geospatial specialist.
The complete workflow — from flight planning to professional geospatial deliverables.
Recent
· Photogrammetry
Image Overlap for Drone Mapping: Why 75% Isn't Always Enough
Image overlap drone mapping: 75/60 is the floor, not the target. Here's what fails when overlap is wrong and how to set photogrammetry overlap by job type.
· Software & Processing
ODM vs ODX: The April 2026 Fork, Explained for Drone Operators
In April 2026 WebODM forked the OpenDroneMap stack and renamed it — ODM became ODX, NodeODM became NodeODX. Which one you actually install, and why.
· Consumer Drone Mapping
Automated Mini 4 Pro Missions: WaypointMap vs Litchi
WaypointMap vs Litchi Pilot vs DroneLink vs DJI Fly for automated Mini 4 Pro missions. KMZ workflow for RC 2, MSDK apps for Android.
· Photogrammetry
Drone Mapping Deliverables: Formats, Exports, Client Needs
Orthomosaic export settings, point cloud formats, DEMs, coordinate systems — and how to package drone deliverables so clients can actually use them.
· 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.
· 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.
· Consumer Drone Mapping
Flight Parameters: Overlap, Altitude & Speed for Mini Mapping
Drone mapping flight parameters: GSD, overlap, altitude, speed. 80% frontal / 70% side minimums. Accuracy improves 11x from 60% to 80% overlap.
Series
Consumer Drone Mapping — Crawl/Walk/Run
6parts published
- 03Your First Orthomosaic in 90 Minutes (No Experience Needed)
- 04DJI Mini Mapping Accuracy: Benchmarks With & Without GCPs
- 05GCP Setup for Non-Surveyors: DIY Ground Control on a Budget
- 06Flight Parameters: Overlap, Altitude & Speed for Mini Mapping
- 07Automated Mini 4 Pro Missions: WaypointMap vs Litchi
- 11WebODM vs Pix4D for Consumer Drones: Free vs Paid in 2026
Defensible Accuracy
2parts published
ODM Cloud Series — Crawl/Walk/Run
1part published
Drone Mapping Checklist Series
6parts published
- 01Why Every Drone Mapping Mission Needs a Checklist
- 02The Pre-Flight Checklist for Drone Mapping
- 03Drone Mission Planning Checklist: The Parameters That Matter
- 04GCP Deployment Checklist: From the Truck to First Flight
- 05Post-Flight QA Checklist: Verify Before You Leave the Site
- 06Processing Checklist: From Raw Images to Defensible Deliverables
Frequently Asked
How accurate is drone mapping?
A well-executed drone survey delivers 2–5 cm horizontal accuracy with proper ground control. Vertical accuracy typically runs 2–3× worse than horizontal on nadir-only flights — adding an oblique pass closes most of that gap. The number that matters is checkpoint RMSE against independent surveyed points, not the GCP RMSE your software reports.
Read the full accuracy guide →Do I need ground control points?
It depends on the accuracy class your project requires. Direct RTK/PPK without GCPs reaches 2–5 cm horizontal under ideal conditions, but vertical bias and doming can blow up without independent control. For any engineering, construction, or formal accuracy claim, GCPs plus independent checkpoints are not optional.
GCP placement and count guide →RTK or PPK — which should I use?
Both achieve comparable real-world accuracy when configured correctly. RTK gives real-time corrections in the field; PPK processes everything after the flight. PPK is more forgiving on remote or RF-noisy sites; RTK is faster when you have a reliable correction stream.
RTK vs PPK decision framework →Which photogrammetry software should I use?
Pix4D, Agisoft Metashape, WebODM, and RealityCapture each fit a different price point and workflow. WebODM is free and capable but needs hardware investment. Metashape is the most flexible for high-accuracy work. Pix4D excels at surveying templates. RealityCapture is fastest for very large datasets.
Vendor-neutral software comparison →What is the best drone for mapping?
For commercial work, a DJI Mavic 3 Enterprise or Phantom 4 RTK remains the practical default. For learning, side projects, and accuracy-tolerant work, a DJI Mini 4 Pro with proper GCPs delivers surprisingly good results — typically ±4–12 inches with disciplined workflow.
Consumer drone mapping buyer's guide →Colophon
Written by Eric — M.S. GIS, FAA Part 107, ten-plus years of geospatial work before drones were the interesting part of the job. Topics: photogrammetry, LiDAR, GCPs, RTK/PPK, coordinate systems, the software stack, and the parts of fieldwork that determine whether the deliverable holds up.
No sponsored posts. Vendor-neutral by default.