Full site survey & 2D floor plans
The client’s instruction was to deliver a full topographic site survey and traditional 2D floor plans of all retail units and apartments together with a detailed (LOD 2) 3D model of the site and all buildings both internally and externally. We were also required to conceptually model and provide detailed 2D elevations of adjacent buildings to capture the context of the location.
Combining laser scanning and traditional survey methods
Given the scale and nature of the site, CADS employed a range of survey methods to effectively record the required survey information. The site topography, floor levels and control network were established using a robotic total station and GPS positioning.
While HD 3D laser scanners were used to accurately measure the external facades of the retail units and surrounding buildings. They were also used to measure the internal details of the larger and more complex retail units and the public house. Approximately 750 scans were captured in total.
CADS also used traditional hand measurement for the majority of the smaller retail unit interiors. This was generally less disruptive and more efficient for the compact store layouts, cellular back of house areas and enabled the retailers to remain open for trading throughout the survey.
3D point cloud, Revit® model and 2D drawings delivered in 9 weeks
Together, four surveyors took three weeks to complete the site topography and building surveys.
The 3D point cloud data, traditional building measurements and site topography were successfully integrated to construct the detailed 3D Revit® models and enable the extraction of the 2D plans and drawing deliverables.
Approximately 6 weeks were spent modelling the site, with multiple surveyors collaborating on the model simultaneously. The completed 3D models and 2D drawings were delivered to the client on time to the agreed budget.