We fly a DJI Matrice 4 with RTK positioning to capture sites, roofs and facades as orthomosaics, 3D models and topographic surveys. Flights are planned and flown under our CAA General Visual Line of Sight Certificate (GVC), and the drone data is merged with our Leica RTC360 terrestrial scans so you get one complete model, inside and out. Hampshire, Dorset, the South Coast, London and nationwide.
We check airspace, obtain any permissions needed and plan an automated flight grid for the overlap photogrammetry needs. Ground control points or the Matrice 4 RTK link tie the survey to the Ordnance Survey grid. Images are processed into a point cloud, mesh, orthomosaic and digital surface model, then QA-checked against control before delivery. Where the brief needs interiors or ground-level detail, we merge the drone data with Leica RTC360 scans into one registered dataset.
CAA GVC operational authorisation, public liability insurance, airspace and NOTAM checks before every flight, and a written flight risk assessment for each site.
With RTK and ground control, photogrammetry typically achieves 20 to 30 mm horizontally and 30 to 50 mm vertically on open ground, and better on hard surfaces. For millimetre accuracy on buildings we combine the drone data with terrestrial laser scanning.
Usually, with planning. Our GVC allows operations in congested areas subject to the risk assessment, and we obtain permissions for controlled airspace where needed.
Typically 20 to 50 hectares for a topographic survey, depending on required resolution and airspace. Larger sites are flown over several days.
Yes. Every flight produces a geotagged photographic record in 4K that we supply alongside the survey outputs.
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