Journal of Architectural Conservation
Volume 17, Issue 1, March 2011
Application of 3D Terrestrial Laser Scanning to Map Building Surfaces
John Smits
Paper Summary
High definition laser scanning is a non-invasive, non-destructive method for recording a 3D digital image of a building. This technology has seen an exponential increase in its accuracy, speed and data collecting capacity over the past five years. Difficulties in processing the large files created from point cloud scanning have been reduced with advances in computer technology such as 64-bit processing and mega-gig video cards. Programs have been developed which allow the utilization of the data within CAD programs typically used in the design industry.
Through case studies and examples, this paper illustrates how 3D laser scanning technology can be used to map planar variations in ceiling and floor surfaces, and masonry façades, and provide evidence of possible structural shifts or deterioration not apparent through traditional visual inspection and measurement methods.
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Figure 1 Bank building, c. 1906, viewed from street corner.
Figure 3 Use of point cloud image to prepare CAD façade documentation.
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John Smits, AIA
John Smits is president of Corinthian Data Capture, LLC, a New York-based laser scanning service provider. A licensed architect, Mr Smits has over 30 years experience in the architecture and construction industry, from managing an A/E office to directing development projects in NYC. He has developed methodologies for applying 3D laser scan data specifically to the architecture and engineering professions, focusing on its use in both documentation and forensic study of buildings.
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