Laser Scanning

Laser scanning, LiDAR or High Definition Surveying (HDS) is the process of using lasers to measure and capture 3D environments.

Use award-winning equipment

There are many different types of laser scanners, some that are better at long-range scanning, some that are more accurate, some that are more portable and some that are faster to use on site. We always use the right tool for the job.

The scanners fire a laser out, typically up to one million times per second and for each surface the lasers hits a point is recorded (x,y,z) in 3D space. In addition, on some scanners, a thermal reading is taken as well as an RGB value that represents the colour.

Get the dots

The laser scanning process needs line-of-site to whatever is being scanned. On site the LiDAR Technician will do scans in multiple locations to ensure the entire site is captured in detail.

The scanner will typically be set to a point density of 3mm at 10m which means there is 3mm between each point that is scanned. If you increase the distance from the scanner, for example, to 20m the space between the points will increase – in this case to 6mm.

Before the project is started the point density will be determined to ensure the resolution of capture is acceptable for the key outcomes of the project.

Join the dots

Modern laser scanning software is powerful enough to recognise features that are common to multiple scans.

The LiDAR Technician will ensure that during data capture there is enough overlap between scans to enable the software to merge the scans into a single 3D model called a point cloud.

Create the 3D Model

Once the data is downloaded to a laptop it is analysed for errors and noise. These unwanted points are removed from the point cloud to get the data clean for 3D modeling.

Specialist software is selected based on the project requirements. Software such as AutoCAD, Revit, 3D Studio Max, Cinema 4D, Rhino, Inventor, Solidworks or Geomagic is used to convert the point cloud data into a 3D model.