Truepoint Laser Scanning

Case Study: Document Historical Exterior of Landmark Building

Close-up of point cloud showing dentils captured from the ground using 3D laser scanning

Location:
Louisville, Kentucky

Task:
To document the historical exterior façade of a landmark building set for demolition.

Challenge:
The building's historical façade is being removed and safely stored for potential future re-use. As such, the client wanted a very accurate, highly detailed documentation of the building façade so that when they are ready to re-construct the façade on the new site they know exactly how it goes back together. Using photographs provides a level of documentation, but are not dimensionally accurate. Using traditional survey methods would be slow and not provide adequate detail necessary. Even a

combination of photographs and traditional survey would be time-consuming and may not capture everything needed to re-build the structure. Once the building comes down there is no going back for additional measurements or information.

Solutions:
3D laser scanning takes millions of measurements per second as it scans the building's façade. The scanner's resolution is great enough to capture each individual brick, mortar joints, finite architectural detail, even cracks and peeling paint. And by further using the scanner's on-board camera, not only was a colorized point cloud created, but dimensionally-accurate 3D photographs (called TruView's) are also created. All of this high level of detail and as-built/as-is documentation was completed in less than half a day, all while demolition activity was underway in and around the site.

Deliverables:
For historical documentation projects, the client will typically want a colorized point cloud and TruView's (3D photographs overlaid on top of the

point cloud data) at a minimum. In this case, the client was also interested in LOD 300 2D AutoCAD drawings of the building's exterior façade.

Added Value:
Since laser scanning is a non-contact measurement tool, TruePoint was able to scan while demolition continued in and around the structure allowing the contractor to keep on schedule and not having to idle or relocate the demolition crews to other sites.

For all of your historical preservation or historical documentation projects, call TruePoint Laser Scanning. In the Louisville, KY. area call us at 513-609-7244 or our corporate office at 419-843-SCAN (7226).

Picture of Leica P-20 scanner capturing architectural detail of historical façade. Colorized Point Cloud (raw scan data) showing the level of detail captured with laser scanning
Colorized Point Cloud of dentil, balcony, ornate columns and other finite architectural details Tile floor of front staircase showing level of detail and resolution captured by 3D laser scanning

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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