Deformation analysis of terrestrial monitoring observations on Turtle Mountain, Alberta

Abstract

Abstract. Deformation monitoring has been carried out in two epochs on Turtle Mountain, Alberta, using a high-precision total station and a terrestrial laser scanner. From the total station observations, coordinates have been computed for seven signalized target points in a least-squares network adjustment. Then, a deformation analysis using a MultiParameter Transformation has been performed to derive movements between epochs. The two point clouds obtained with the laser scanner were registered using the iterative closest point algorithm. Differences in elevation between the two point clouds were then derived for the entire scene. Results indicate a downward movement of South Peak, and no significant horizontal deformations were found.

Surface-based matching of 3D point clouds with variable coordinates in source and target system

“…Surface registration is an intermediate, but crucial, step in the three-dimensional (3D) reconstruction of real objects. The terrestrial laser scanning technique is now widely applied in surveying engineering, photogrammetry, and other disciplines as its performance capabilities are advancing rapidly (Ebeling et al, 2011;Gordon and Lichti, 2007). Hundreds of different laser scanners with a great variety of measurement systems are now available; in the current fast-paced laser scanning market, these are updated almost every year.…”

Dynamic beam deformation measurements with off-the-shelf digital cameras

“…Traditionally, large structures have been monitored using ground-based surveying techniques [6,10]. In the past decade, these techniques have been complemented by global navigation satellite system (GNSS) positioning methods [3,7,17].…”

Image-Based Deformation Monitoring of Statically and Dynamically Loaded Beams

“…In order to avoid potential structural failure, the maximum loading capacity of the system must be known before its completion, and regularly scheduled maintenance checks must be performed after its completion (Park et al, 2007). Traditionally, large structures have been monitored using surveying techniques (Ebeling et al, 2011;González-Aguilera et al, 2008), while fine-scale monitoring of smaller structural components has been done with instrumentation for civil engineering purposes such as strain gauges (as explained in González-Aguilera et al, 2008;Maas and Hampel, 2006). Both methods have two downsidesdeformation could only be detected at specific point locations, and in the case of failure during the time of monitoring, the area around the object of interest can become hazardous.…”