UAV AERIAL SURVEYS FOR COMMERCIAL PROJECTS
Photogrammetry is a surveying and mapping technique, which is used in many applications in the surveying industry such as topographic mapping, site planning, determining earthworks volumes, production of digital elevation models (DEM) and geo-referenced orthographic maps. An ortho-rectified aerial image can be used to determine accurate measurements, after having been adjusted for topographic relief, lens distortion, and camera tilt.
Drones provide quick deployment and turn-around times with accurate reporting from point cloud datasets. Survey ground control, processing, and reporting is carried out by our experienced and registered surveyors.
Surveying a stockpile using a drone is becoming simpler, faster, and safer than the traditional survey methods. Surveying from an aerial perspective overcomes the problem of stockpile height, steep slopes and the potential risk to a surveyor on foot. The speed and precision of using a drone means that surveys can be undertaken more regularly and with greater accuracy than ever before, especially when considering medium to large-scale stockpiles.
- Ad-hoc stockpile measurements and volumetric reporting
- Periodic stockpile audit measurements and volumetric reporting for mines
- Accurate ortho-mosaic images/maps to visualise and verify stock on hand
Uneven terrain can cause difficult and hazard working conditions for surveyors travelling over land on foot. Drones are able retrieve topographical maps of large areas with minimal wear and tear on equipment. They save time and money, with quick deployment and turn-around times resulting in precise and accurate data and ortho-rectified imagery.
- Predesign surveys
- Detailed surveys of existing infrastructure and topography
- Digital Surface Models (DSM) & Digital Terrain Models (DTM). Scope for DTM is limited to areas with sparse vegetation
- Contour maps
- Accurate ortho-rectified imagery/maps
- Geo-referenced High Resolution Orthophotos up to 1cm GSD
AS BUILT SURVEYS
Accurate and detailed as-built drawings are essential to the success of modern day construction projects. Drones can survey areas of interest to offer superior, speedy, and accurate surveys/models.
- Cost-effective as-built surveys for the quick collection of data for generation of 3D models=
- Data acquisition for GIS applications
- Point cloud data acquisition of existing infrastructure for planning
- Accurate geo referenced Ortho-rectified imagery for generating CAD line drawings
- High-Resolution Google Earth overlays
Aerial drones can efficiently survey corridors – ie pipelines, roads, and servitudes with quick turnaround times to create accurate surveys/models
- Mapping of small to medium scale areas
- Accurate Digital Surface Models (DSM) & Digital Terrain Models (DTM) -Scope for DTM is limited to areas with sparse vegetation
- Contour generation
- Geo-referenced, High Resolution Ortho-rectified imagery with up to 1cm GSD
The data collected from drones can be used for drainage design plans for development sites. Data can also be used determine the best route for water to flow across a selected area.
- High-density point cloud data for analysing terrain/ flow patterns
PORTABLE INTEGRATED MULTI-BEAM SURVEYS
The HydroLite-MB Multi-beam is a portable, bathymetric, dual frequency survey system. It has been designed as a turnkey, shallow water multi-beam rig, pre-installed and pre-calibrated on its mounting frame.
- Shallow water multi-beam surveys
- Depth sounding - Sound velocity profiler
- Ultra-high resolution sonar
- Side scan imagery
- Identification of critical and dangerous objects on the harbour bed
SINGLE BEAM BATHOMETRIC SURVEYS
This consists of an automatic bathometric drone catamaran capable of providing aquatic surveying.
- Monitoring of various marine sites
- Sub-surface Digital Terrain Models (DTMs)
GROUND PENETRATING RADAR
Ground-penetrating radar (GPR) is a geophysical method that uses radar pulses to image the subsurface. This non-destructive method uses electromagnetic radiation in the microwave band (UHF/VHF frequencies) of the radio spectrum, and detects the reflected signals from subsurface structures. GPR can have applications in a variety of media, including rock, soil, ice, fresh water, pavements and structures.
The non-destructive methods of ground-penetrating radar is fast becoming a viable technology worldwide for surveying subsurface features and defects in flexible and rigid pavements
- Detection and mapping of utility lines such as water pipes, storm water pipes, sewer pipes, and cables/cable conduits
- Detection and mapping of subsurface features
- Archaeological applications