3D laser scanning has transformed how existing buildings and infrastructure are documented. Where traditional survey methods require significant on-site time and produce drawings of variable accuracy, laser scanning captures millions of data points in hours, producing a highly accurate digital record of the existing condition.

What is a point cloud?

A point cloud is a collection of millions or billions of data points, each with an X, Y, and Z coordinate, that together represent the surface geometry of a real-world space or structure. Point clouds are captured using 3D laser scanners which emit laser pulses and measure the time taken for the pulse to return from each surface.

A modern terrestrial laser scanner can capture several million points per second and scan a typical room in minutes. Multiple scanner positions are combined through a process called registration to create a single unified point cloud.

How point cloud data is used to produce drawings

Once a point cloud has been registered and cleaned, it can be used as the basis for 2D CAD drawings or 3D BIM models. For 2D drawing production, the point cloud provides accurate dimensions that can be traced directly into AutoCAD. For BIM model production, the point cloud is used as a reference within Revit, with model elements placed and dimensioned against the measured data.

When to use point cloud scanning

Point cloud scanning is particularly valuable for existing buildings where original drawings are unavailable or inaccurate, renovation and refurbishment projects where accurate existing condition information is critical, industrial plant where complex pipework needs to be accurately documented, and large facilities where traditional manual survey would be prohibitively time-consuming.

Point cloud to BIM for as-built documentation

Using point cloud data to produce as-built BIM models gives a higher level of accuracy than traditional redline-based as-built production and produces a three-dimensional record that supports ongoing facilities management and digital twin development.

Outsource CAD point cloud services

Outsource CAD provides point cloud processing and conversion services, producing 2D CAD drawings and Revit BIM models from scan data you supply or from surveys carried out by our survey team. Contact us for a free consultation.