Projects City Rail Link – Building Façade documentation Auckland 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