Precision Drone Mapping on a Budget | DJI Mini 4 Pro + Litchi + WebODM Tutorial

Think you need an expensive RTK drone for accurate mapping? Think again! In this step-by-step tutorial, I’ll show you how to perform survey-grade drone mapping using affordable tools — including a DJI Mini 4 Pro, Litchi’s new mapping feature, and WebODM. Whether you’re a beginner or a pro looking to cut costs, this video will walk you through everything from field setup to final map processing — all while achieving centimeter-level accuracy. 💡 Perfect for: Surveyors, mappers, and drone enthusiasts on a budget Projects that require high accuracy without enterprise costs Anyone flying sub-250g drones who wants to unlock professional mapping workflows 📆 Want some One on One time with your favorite drone expert? Book your consulting session here: https://calendly.com/barry-aviosaeria... 🧰 Tools and Resources Mentioned 🛰️ Drone: DJI Mini 4 Pro 📱 Flight App: Litchi Pilot (Waypoint Mode) https://flylitchi.com/ 📡 GNSS Receiver: Emlid Reach RS3. Need an Emlid GNSS receiver? Support the channel by using my affiliate link: https://store.emlid.com/barry 🌐 NTRIP Services: Point One Navigation (Free Trial). https://pointonenav.com/ 🌐 Photogrametry Software: WebODM 🔗 Get 250 free credits when signing up for WebODM Cloud using this link: https://webodm.net/uav_mapping/19634 📡 Need an Emlid GNSS receiver? Support the channel by using my affiliate link: https://store.emlid.com/barryDrone Mapping Masterclass: From Planning to Delivery 🎯 GCP targets https://skyhighbullseye.com/ 00:00 - Introduction 00:32 - Preparation 01:09 - The Tools 04:07 - Software and Services 05:47 - Setup your GNSS receiver 10:06 - Setup your mission in Litchi 13:53 - Place and Mark your GCPs 18:57 - Processing the Data 19:11 - Convert Emlid Data to GCP Pro Format 20:53 - Setting the Coorindate Reference System 21:58 - Convert EPSG to Proj 23:00 - Connect GCPs to Images 25:34 - Process Photos and GCPs in WebODM 27:06 - Wrap Up