Ayres Knowledge Center HD Scanning for Infrastructure - Page 2

HD SCANNING: THE BASICS Facts • Mass 360-degree data “point” collection. • Up to 1 million survey measurements per second. • Measurements are nonintrusive and made from a safe distance. • When brought into computer software and registered together, they are collectively referred to as a “point cloud.” • Often clouds are composed of over 100 million points. • Point density makes the cloud similar to a photo. • Photographs are also taken during the scan to provide color to the point data. • If photos are not taken, the cloud would use intensity for color. Point Cloud Advantages • • • • • Design in 3-D. True as-built dimensions. Clash detection. Structural evaluation. Wide range of software support, including Revit, AutoCAD, Navisworks, PLS-CADD, MicroStation. 2 | SCANNING FOR INFRASTRUCTURE SUBSTATION POINT CLOUD Land surveyors are trained to collect data – millions of points per setup – via tripod-mounted HD scanners. The surveyors piece together the overlapping scans, and then technicians extract the data and produce CADD drawings and various other deliverables that are within 1/4 -inch accuracy when scanned up close and within about an inch if scanned from 400 feet away. Here are some of the many applications for HD scanning: • • • • • • • Transportation design. Bridge and overhead obstruction clearance. Substations and utility infrastructure. Industrial facility maintenance. Architectural components. Change detection (load stress and settling). Americans with Disabilities Act (ADA) compliance checks regarding sidewalk ramp slopes. • Analysis of discontinuities (such as confirming the flatness of an old factory’s floors to determine what imperfections might need to be corrected for reuse as a hospital or production facility). AYRESASSOCIATES.COM | 3