Terrestrial Scanning / As-built Surveying

Bridge Surveying, USA 17.10.2007

Riegl Lidar scanner LMS-Z420i utilized by the Federal Bureau of Investigation Lab in support of the National Transportation Safety Board to conduct a structural analysis of the collapsed I-35W Bridge in Minneapolis, Minnesota. The I-35W Mississippi River Bridge collapsed on August 1, 2007 at 6:05 pm when the main spans of the bridge collapsed, falling into the river and the surrounding banks. By utilizing Riegl Lidar scanning technology government officials will assist in the analysis of the failure of the bridge.The Riegl LMS-Z420i is a rugged and fully portable sensor designed especially for the rapid acquisition of high-quality three dimensional images. It consists of a high performance, long-range 3D laser scanner in conjunction with a calibrated Nikon digital camera. Laser scanning is quickly emerging as an important and indispensable metrology tool in the area of surveying, engineering and forensics. The FBI uses this important tool for analysis of important segments of the Nations Infrastructure.