Projects

City Rail Link – Building Façade documentationAuckland CBD

The Project

As part of the City Rail Link project the client was

required to do a pre-construction survey of the 8

buildings surrounding and including the CPO

building. This was to document the condition and

state of all 8 buildings before construction

commenced.

3D Laser Scanning was utilized to capture the as-

built data of the existing buildings, paying

attention to the exterior walls or cladding of each

of the buildings. On 2 of the buildings

documentation of the roof was required. This was

critical in ensuring that a complete digital record

was documented of all 8 buildings prior to

construction commencing.

Time was saved by collecting all relevant digital

dimensional and façade data of the exteriors of 8

buildings in only 5 days as opposed to

conventional methods that would take

considerably longer to achieve.

The Delivery

Upon processing of the collected data a fully

registered 3D point cloud was created for the entire

site and each individual building from the scan

data. Those point clouds were then exported to

Autodesk ReCap for use in an AutoCAD drawing

Each building was delivered with the ReCap file,

an AutoCAD drawing with the scan data imported

into it, and a Navisworks file with the scan data

imported for easy 3D navigation of each building.

Key Details

Project: External Laser Scan of 8 existing buildings at Britomart in the Auckland CBD

Location: Auckland CBD

Duration: 5 Days

Sector: Building Survey

Project Team: Brian Kelly

Benefits• Accurately measured all existing features• 5 days to accurately record 20,000m²• Re-used data for multiple additional design

measurements• No working at height for elevated

measurements• Recorded the “hard to achieve” measurements