INSURED AND ACCREDITED
Drone surveys combine the very latest advances in technology, using innovative imaging equipment to be able to perform an extensive range of high quality mapping as well as aerial surveys. Drone Surveys is the quickest and most efficient high resolution imagery, which will fill in the gaps given from other methods of surveying, such as conventional topographical surveys. This enables us to gather more reliable data, ensuring that the survey you receive is more effective than any other company.
A drone survey can cover a far larger area than a standard topographical survey which can be far more cost effective for our clients. A drone survey enables us to collect vast amounts of data in a short space of time.
How to Contact Subvision Surveys
Give us a call on 0330 134 6861 to get in touch with a member of our team.
Who are Subvision Surveys?
Subvision Surveys are the leading innovators of underground surveying. We are proud to be able to offer many different services, ranging from GPR Surveys, Drone Surveys, Underground Utility Mapping and lots more. We have been in operation for over 19 years, and over the course of those years we have developed a firm business plan, which enables us to continue being the UK’s leading Drone Surveys provider.
How the survey grade accurate 2D/3D digital outputs from drone technology can be used on projects
A digital representation of a project can be regularly created to keep pace with changes onsite and used as follows:
- Help surveyors, engineers, designers, project managers and senior management understand progress related to the design models
- Manage earthworks with cut and fill volumetric measurements
- Enable progress monitoring of the project at all stages of construction against the design models and as-build
- Quality assurance checks of construction materials used onsite
- The high resolution imagery can be integrated and used in BIM
- Evidence regarding the amount of work carried out
- Combining aerial video with 3D animation/augmented reality for master planning, community engagement, internal planning, marketing, health & safety, planning applications and project concept.
- The digital outputs can be used in Virtual Reality (VR) or combined with BIM.
- 2D/3D digital outputs can be integrated into existing workflow processes as the data can be produced in various CAD, BIM and GIS formats e.g. dwg, dxf, xyz, las, laz, obj, geotiff, e57 etc.
Point Cloud (.las file)
Point Clouds are data sets which include millions of individual 3D points that reconstruct the site(s). Each of the points stores both accurate geo-spatial data (x,y,z coordinates) as well as colour in order to create an exact digital replica of the real world. We create these models using photogrammetry.
- Accessibility – an exact digital copy of the project site(s)
- Accuracy – data captured will have meet the following requirements: approx. +-15-20mm Ground Sampling Distance (GSD), Global RMSE accuracy of +-20 to 50mm on X, Y and Z is achievable
- Compatible – the .las file can be downloaded and imported into other software such as: Autodesk, Bentley, GIS or BIM platforms
An orthomosaic is a high resolution orthorectified 2D map of the site(s). It’s the same as an OS map where measurements can be made. Each of the individual points stores both geo-referenced data (x,y coordinates) as well as colour.
- Visualisation – orthomosaic files present a clear and accurate 2D visualisation of the geo-spatial data
- Project management – orthomosaic maps can help provide detailed visual overview of a project. The can be compared over multiple time periods for inspection purposes.
- Compatible – the 2D orthomosaic is compatible with other software such as: AutoCAD, Global Mapper, ArcGIS, QGIS, etc.
A contour map is a map illustrated with contour lines which shows earthworks, valleys, hills, and the steepness or gentleness of slopes. The contour interval of a contour map is the difference in elevation between successive contour lines. We can produce these maps at various intervals e.g. 0.25m, 0.5m etc.
Digital Surface Model (DSM) measures the height values of the first surface on the ground. This includes terrain features, buildings, vegetation and any other objects. It is commonly seen as a canopy model and only ‘sees’ ground where there is nothing else overtop of it. DSM’s provide a topographic model of an area, site or land.
A 2D orthomosaic can be converted into a google earth file. The asset/project can be viewed in google earth in HD while also providing context of its location.
Aerial images and video
Aerial Video & 3D Animation/Augmented Reality
We can enhance aerial video or images and add 3D animation or Augmented Reality (AR) for master planning, community engagement, internal planning, marketing, health & safety, project inductions, planning applications, project concept, visualisation or external presentations.
Aerial LiDAR can be used for the mapping of land, property, utilities, infrastructure and geology. It’s an airborne version of terrestrial laser scanning and because the scanner is in the air it’s able to rapidly scan large or complex areas. Aerial LiDAR can collect 700,000 points per second with an average surface density of >700 points per square meter. Examples of how aerial LiDAR can be used on projects:
- Aerial LiDAR can be combined with terrestrial LiDAR to create a complete 3D model of a structure. Terrestrial LiDAR on its own can’t capture all sections of a structure at high elevations.
- Aerial LiDAR is ideal for continuous mapping of long corridors for motorways, railways, powerlines, pipelines and other major infrastructure projects.
- Aerial LiDAR can produce detailed digital terrain models and 3D point clouds that cannot always be achieved using traditional surveying techniques or photogrammetry so when surveys are required for terrain covered in vegetation this system is ideal.
Modelling – CAD/REVIT/ScanToBIM
The 2D or 3D digital data from aerial technology or terrestrial laser scanning can be converted into a CAD/BIM/REVIT model for planning and design work.
The survey grade accurate 2D/3D digital data produced from drone technology can be used for:
- the planning, maintenance, inspection and management of assets
- measured building surveys
- thermal imaging for heat loss, leak detection or solar panel inspections
- creating 2D CAD/3D REVIT of hard to reach roof areas
We use different types of sensors to capture digital data e.g. LiDAR, RGB or Thermal Imaging cameras.
We have a special license from the CAA called an Operational Safety Case (OSC) which allows us to fly drones within 10/20m of people, vehicles and buildings outside of our control so we can operate in city centres for surveying or inspection projects.
Digital Output File Types
Google Earth KML/KMZ
Google Map Tiles
World Wind Tiles
Tiled Map Service Tiles
|Point Cloud||Wavefront OBJ (*.obj)
Stanford PLY (*.ply)
ASCII PTS (*.pts)
ASPRS LAS (*.las)
ASTM E57 (*.e57)
XYZ Point Cloud (*.txt)
Cesium 3D Tiles (*.zip)
Universal 3D (*.u3d)
Autodesk DXF (*.dxf)
Agisoft OC3 (*.oc3)
Topcon CL3 (*.cl3)
Adobe 3D PDF (*.pdf)
|Digital elevation model (DSM/DTM)||GeoTIFF elevation (*.tif)
Band interleaved file format (*.bil)
Sputnik KMZ (*.kmz)
Google Map Tiles (*.zip)
World Wind Tiles (*.zip)
Tile Map Service Tiles (*.zip)
|Shapes and contours||Shape Files (*.shp)
DXF Files (*.dxf)
KML files (*.kml)
KMZ files (*.kmz)