Keywords: glass sky scan, façade inspection, building envelope safety, non-destructive testing, high-rise glass failure.
When a laser scanner, like those used in Terrestrial Laser Scanning (TLS), hits a pane of glass, most of its laser beam passes right through. The scanner captures the objects behind the glass instead of the glass itself, resulting in — unwanted holes in the 3D point cloud where the glass should be. Research shows that ordinary float glass can have data voids covering over 93% of its surface in a scan. This creates an incomplete, ghost-like digital model that is useless for accurate documentation. Furthermore, glass can create a 'hotspot effect', a bright, blown-out area in the scan data within 2 to 5 degrees of the angle of reflection, and can produce false data points as the beam reflects off surrounding surfaces. glass sky scan
: Sky recommends using only the built-in phone camera rather than third-party scanner apps to avoid potential phishing sites. 2. Terrestrial Channel Scanning (Freeview) Research shows that ordinary float glass can have