Fleet & technology

Enterprise kit. Survey-grade results.

Survey accuracy is built from the ground up: calibrated sensors on stable aircraft, survey-grade GNSS control and a processing pipeline that checks itself.

Put it to work

Aircraft

01 · Aircraft

DJI Matrice 350 RTK

Our primary survey aircraft. An IP55-rated enterprise platform with built-in RTK, hot-swappable batteries and six-directional obstacle sensing, carrying the Zenmuse P1 camera or Zenmuse L2 LiDAR.

Max take-off weight: 9.2 kg
Max flight time: 55 minManufacturer figure, no payload, still air. Survey sorties are shorter
Ingress protection: IP55
Max wind resistance: 12 m/s
Operating temperature: −20 to 50 °C
RTK positioning: 1 cm + 1 ppm (H), 1.5 cm + 1 ppm (V)RTK FIX, manufacturer specification
Video transmission: DJI O3 EnterpriseUp to 8 km (CE), unobstructed
Obstacle sensing: Six-directional0.7–40 m horizontal, 0.6–30 m vertical
Power: Dual TB65 batteries, hot-swappableBattery changes without powering down the aircraft
Max horizontal speed: 23 m/s

Aircraft

02 · Aircraft

DJI Matrice 4E

A compact mapping aircraft with a mechanical-shutter 4/3 camera, two 48 MP telephoto cameras and a laser rangefinder. We use it for smaller sites, stockpile programmes and oblique capture where a heavy-lift platform is unnecessary.

Take-off weight: 1,219 gStandard propellers
Max flight time: 49 minManufacturer figure, standard propellers
Wide camera: 20 MP 4/3 CMOSMechanical shutter, 2–1/2000 s
Medium tele camera: 48 MP 1/1.3″ CMOS70 mm equivalent focal length
Tele camera: 48 MP 1/1.5″ CMOS168 mm equivalent focal length
Laser rangefinder: Up to 1,800 mAt 20% target reflectivity
Min photo interval: 0.5 s
RTK positioning: 1 cm + 1 ppm (H), 1.5 cm + 1 ppm (V)RTK FIX, manufacturer specification
Max wind resistance: 12 m/sTake-off and landing
Operating temperature: −10 to 40 °C
Video transmission: DJI O4 EnterpriseUp to 12 km (CE), unobstructed

Sensor

03 · Sensor

DJI Zenmuse L2

An integrated LiDAR, IMU and 20 MP RGB mapping camera. Its multi-return laser reaches the ground through gaps in vegetation and records fine structures such as overhead conductors, fences and gantries.

LiDAR: Livox frame LiDAR, 905 nmClass 1 eye-safe (IEC 60825-1:2014)
Point rate: 240,000 pts/sSingle return; up to 1.2 million pts/s with multiple returns
Returns per pulse: Up to 5
Detection range: 250 m at 10% reflectivity100 klx; 450 m at 50% reflectivity, 0 klx
Ranging accuracy: 2 cm at 150 m
System accuracy: 5 cm (H), 4 cm (V) at 150 mManufacturer laboratory figure. We report checkpoint RMSE for each project
Field of view: 70° × 3° or 70° × 75°Repetitive or non-repetitive scan pattern
RGB camera: 20 MP 4/3 CMOSMechanical shutter, used to colourise the point cloud
Weight: 905 g
Ingress protection: IP54

Sensor

04 · Sensor

DJI Zenmuse P1

A 45 MP full-frame photogrammetry camera with interchangeable fixed lenses and a mechanical leaf shutter, built for survey-grade orthomosaics, surface models and textured 3D models.

Sensor: 45 MP full-frame35.9 × 24 mm
Pixel size: 4.4 µm
Lenses: 24 mm, 35 mm and 50 mmDJI DL F2.8 LS ASPH, fixed focal length
Shutter: Mechanical leaf shutter, 1/2000–1 sNo rolling-shutter distortion at survey speeds
Min photo interval: 0.7 s
Ground sample distance: ≈ 1.5 cm at 120 m35 mm lens; ≈ 1.0 cm at 80 m
Manufacturer accuracy: 3 cm (H), 5 cm (V)Without GCPs, DJI test conditions. Our GCP-controlled work is typically tighter
Weight: ≈ 800 g
Ingress protection: IP4X
Operating temperature: −20 to 50 °C

GNSS

05 · GNSS

GNSS base station and RTK rover

Survey-grade, multi-constellation GNSS receivers of Trimble and Leica class. We use them to fix ground control and independent checkpoints, log base data for PPK, and infill ground detail the aircraft cannot see.

Constellations: GPS, GLONASS, Galileo, BeiDou
RTK precision: 8 mm + 1 ppm (H), 15 mm + 1 ppm (V)Typical manufacturer RMS for this class of receiver
Corrections: Network RTK or local baseCommercial network RTK services referenced to OS Net
Static post-processing: Against OS Net CORSUsed for control networks and PPK base coordinates
Coordinate transformation: OSTN15 and OSGM15ETRS89 to OSGB36 British National Grid and ODN heights
Ground control targets: High-contrast targets, 600 mm–1 mSized to the GSD; permanent markers for repeat surveys
Checkpoint policy: Independent checkpoints on every jobWithheld from processing and used only to test accuracy

Processing

06 · Processing

Processing and QA pipeline

An auditable chain from raw capture to finished CAD, built on industry-standard photogrammetry, LiDAR, GIS and survey software, with checkpoint-based quality control at every stage.

Photogrammetry: Agisoft Metashape, Pix4D, DJI Terra
LiDAR trajectory and point cloud: DJI TerraTrajectory post-processed against local base or OS Net data
LiDAR classification: TerraScan and TerraMatchTerrasolid: strip adjustment, classification, manual editing
GIS and surface analysis: Global Mapper, QGIS
CAD and survey drafting: AutoCAD Civil 3D, n4ce
Coordinate transformation: OSTN15 and OSGM15Ordnance Survey definitive transformation and geoid model
Quality control: Checkpoint RMSE on every deliverableResiduals and methodology stated in the survey report
Data handling: Project data processed in the UKSecure transfer; UK GDPR compliant

Maintenance & calibration

Kit you can trust on the day.

Aircraft are maintained to manufacturer schedules with logged flight hours and battery cycles. Sensors are boresight-checked and GNSS equipment is verified against known control before project work. Crews carry spare batteries and backup equipment to site, so a single fault does not cost you a survey day.

Start a project

Tell us the outcome. We’ll specify the survey.

Get a survey quote Just talk to a drone surveyor

Or call 07368 537499 · Mon–Fri 08:00–18:00

01We aim to reply within one hourA drone surveyor, not a salesperson, reviews your brief and calls if anything needs clarifying.
02Fixed quote & method statementScope, accuracy specification, deliverables, programme and RAMS — in writing.
03Fly, process, deliverCapture on your programme, then CAD-ready data with a verified accuracy report.