Drone survey and inspection gallery

Volumetric surveys for construction earthworks, quarries, mining and landfill sites: quick, accurate, safe and cost-effective, with results delivered digitally.

Fast, accurate, safe and cost-effective topographical surveying, suited to construction sites, mines, quarries and landfill alike.

DTA runs 4x4 vehicles with full off-road capability, so quarry, mining, landfill and construction sites with difficult vehicular access are never a barrier to a survey.

Site topographical surveys with accuracy matching ground-based laser surveys give facilities management teams fast, safe, cost-effective digital data they can build on.

DTA's cloud-based survey data delivery and analysis tools let engineers access and analyse results anytime, anywhere, from a simple PC, laptop or tablet via the web.

Drones are ideal for construction site topographical surveys: this one covers a site near Bristol.

Quarries, mines and landfill sites have rapidly become core business for DTA, with nadir imagery like this forming the basis of accurate site models.

The Normalized Difference Vegetation Index (NDVI) measures plant greenness and photosynthetic activity, and is one of the most widely used vegetation indices in precision agriculture.

Aerial view of Swansea Kings Dock, captured for a drone volumetric survey measuring stockpiled material by air.

Aerial photograph of Barry Docks taken during a drone volumetric survey, used to measure stockpiled material from above.

Aerial photograph of Celtic Springs business park, captured during a drone topographical survey of the site.

A ground-based laser scanner working alongside a drone on site in 2021, combining aerial and terrestrial data for a measured survey.

A drone and a ground-based laser scanner pictured together on site in 2020, part of a combined survey capability.

Aerial photograph of a building in Elstree, Greater London, captured during a drone measured building survey.

Aerial photograph taken during a drone topographical survey of a construction site in Greater London.

Aerial photograph taken during a drone topographical land survey of an HS2 construction site.

Aerial photograph taken during a drone-based methane gas measurement survey of a site.

Aerial photograph of the energy facility at Calvert landfill site, Buckinghamshire, captured during a drone survey.

Aerial photograph of a road tunnel at Llanddulas, North Wales, captured during a drone survey.

Aerial photograph of a residential construction site at Sudbrook, captured during a drone volume survey.

Aerial photograph of Oakley Court Hotel on Windsor Road, Windsor, captured during a drone grounds survey.

Aerial photograph of upland terrain near Tonyrefail, captured in 2017 during a drone topographical survey.

Aerial photograph of land at Tredean, captured in 2017 during a drone topographical survey.

Aerial photograph of upland terrain at Mynydd Portref, captured in 2017 during a drone topographical survey.

Aerial photograph of upland terrain at Mynydd Brombil, captured in 2017 during a drone topographical survey.

A second aerial photograph of upland terrain at Mynydd Brombil, captured in 2017 during the same drone topographical survey.

A cut volume of 657 cubic metres computed over a stockpile in the 3D model produced from a drone quarry survey.

Drone view over a sand and gravel processing plant: silos, conveyor, washed stockpiles and the settling pond, captured during a quarry survey on a frosty morning.

Nadir drone image of quarry stockpiles, the site compound and a silt lagoon, the viewpoint used for volumetric measurement.

Nadir drone image of a sand extraction cell with the stripped overburden bank and haul road, surveyed for face position and volumes.

A DJI Matrice 300 on the ground at first light on a frosty morning, set up for a topographical survey of a proposed solar farm.

A DTA surveyor observing GNSS levels on a ground control point in standing crop, the control that ties a solar farm drone survey to Ordnance Survey grid and datum.

The sheet index of DTA's topographical survey drawing set for The Droves Solar Farm site in West Norfolk: contours, field boundaries, tracks and features across the whole site, issued at A0 at 1 to 500 on OS grid and datum.

The high resolution orthomosaic of the 75 hectare Malverleys estate near Newbury, produced from DTA's single day combined aerial LiDAR and 45 megapixel photogrammetry flight.

Contours from the bare earth model of the Malverleys estate: vegetation and structures removed so only the ground surface remains for the client's CAD workflow.

Parkland and mature trees on the Malverleys estate near Newbury, photographed on the day of DTA's survey in May 2026.

A bronze horse head sculpture in the gardens of the Malverleys estate, photographed during DTA's survey visit.

Horses at a paddock gate during DTA's survey of the working estate in May 2026.