Precision mapping with the DJI Mini 3 Pro and Litchi

Acquiring ultra-high-resolution aerial imaging by using the capable DJI Mini 3 Pro and the publicly-released beta ‘Litchi Pilot’ app by proving again that this sub-250g UAV’s outputs can be applied towards topographic mapping, surveying, and photogrammetry. Several ‘survey accurate’ geospatial outputs were produced at an RMSE of 18.6mm which is better than the ‘20mm to 50mm’ realistic range of drone/photogrammetry-derived accuracies as detailed in the ‘RICS Professional Guidance Note – Measured Surveys of Land, Buildings and Utilities’.

With a terrain-following collection flight at 60m high over the huge ‘Northumberlandia’ (the “Lady of the North”) land art sculpture, it enabled the DJI Mini 3 Pro at its ’48MP’ JPEG resolution setting applied to collate over 450 high-overlapped nadirs at a consistent spatial resolution of 1cm/px GSD. After a successful collection, onward imagery rectification with several GCPs from a survey GNSS that were recorded at an X,Y,Z accuracy of 10mm and processing in Pix4DMapper photogrammetry software, it resulted in the generation of several highly accurate geospatial datasets.

What to know more and how it can be done?

Professionally delivered by an instructor who has over 30 years of accredited subject matter expertise (a 22 years-served Royal Air Force Imagery Analyst, a CSI Analyst Contractor, and, for the past 9 years, a highly-experienced commercial practitioner in such), attendees on ARC Aerial Imaging’s ‘Drone Aerial Imaging Masterclass Course for Mapping, Surveying and Photogrammetry’ will learn how to accurately plan and collate high-quality UAV-borne aerial imaging whilst understanding the important fundamentals and principles in such along with collating other project-supporting geodata including precise point positioning information to produce and provide accurate and survey-compliant geospatial datasets.

Furthermore and as it is a RICS Tech Partner Programme member, course attendees can be assured that this specialist training is provided in accordance to RICS high standards.

Visit to know much more, its comprehensive syllabus, what drone types are currently compatible with the course, and published training dates at both its North Yorkshire and Cambridgeshire-held training venues.

ARC Aerial Imaging Limited
UK CAA UAS Operational Authorisation No 685

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