Truepoint Laser Scanning

Case Study: Survey of Historical Building to Document it Prior to Demolition

Figure 1 – Built in 1893 –
this picture shows what it looked like in 1919

Location:
Columbus, Ohio

Task:
To scan the exterior façade of a historical building to document it prior to demolition.

Challenge:
The building was enclosed in Visqueen during the interior demolition, and the façade was blocked by scaffolding. There was only a short window of opportunity in which to document the façade once the Visqueen was removed and prior to demolition of the structure. In addition, the scaffolding made it difficult to document the façade using traditional methods.

Solution:
By using laser scanning, TruePoint was able to scan the façade in a matter of hours. Also, by scanning from several locations in order to capture different angles, the scanner was able to pick up the data that would otherwise have been hidden behind the scaffolding. During post-processing, our team was able to "clean out," or remove, the scaffolding from the point cloud data, leaving only the building façade visible in the data.

Deliverables:
In this particular case, the client was only interested in documenting the building for historical purposes for the time being and, therefore, only requested a colorized point cloud and TruViews. TruViews are 3D photographs overlaid on top of the point cloud data which allow anyone with Internet Explorer to look at the 360-degree pictures taken from the scanner's perspective.

Added Value:
The great thing about using laser scanning for a project like this is that, although the building has been demolished, once the point cloud data has been captured, it can be used at any time, presently or in the future. Laser scanning captures the existing conditions and features at the time of scanning; therefore, the building has been preserved forever through photographs – and, more importantly, through the scan data. The scan data can be electronically saved and referenced back to at any point in the future to re-create the building, either through drawings or even a 3D scaled model.

For project inquiries in Cincinnati and surrounding cities, contact TruePoint at 513-609-7244
cincinnati@truepointscanning.com
.

 

Figure 2 - Picture taken in 2014 shortly before demolition

 

Figure 3 - Colorized Point Cloud of Building Facade
(with scaffolding)



Figure 4 – Point Cloud of Building Facade after post-processing of point cloud to remove the scaffolding

 

Site Last Updated June 26, 2017
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*DISCLAIMER: 3D Laser scanning is a measurement tool to assist in capturing as-built conditions of existing spaces and should be used in conjunction with other sound industry practices for verifying these conditions, including but not limited to: site visits, manual field measurements and verifications of scan data, to ensure its accuracy prior to design and engineering. Because this data can be used for various applications and disciplines outside the scope of the original field scanning and beyond our control, we cannot guarantee that the data is accurate for these uses.
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