Special issue: deformation monitoring
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PREFACE
Special issue: deformation monitoring Andreas Wieser 1 & Alessandro Capra 2
Published online: 6 June 2017 # Società Italiana di Fotogrammetria e Topografia (SIFET) 2017
Deformation monitoring is an indispensable contribution of geomatics to society and economy. It provides quantitative and reliable information for studying processes in the natural and man-made environment, for risk assessment and for timely adoption of appropriate measures. There is a strong geomatics tradition in geomonitoring of ground subsidence, landslides (in the wide sense of types and processes presented by Cruden and Varnes 1996), glaciers, and large man-made structures like dams and tunnels, culminating in an extensive body of methods for deformation analysis based on points and networks, see e.g., Heunecke et al. (2013). However, the recent advances in areal measurement technologies, terrestrial laser scanning and ground-based radar interferometry in particular, and the increasing adoption of in situ sensing capabilities as offered e.g., by fiber optic sensors or inclinometers, enabled geomatics to contribute also significantly to the interdisciplinary field of structural health monitoring. Against this background, the 3rd Joint International Symposium on Deformation Monitoring (JISDM) took place in Vienna, Austria, from March 30 to April 1, 2016. JISDM had been initiated to bring together a broad geodetic community by combining the FIG symposia on deformation measurements, and the IAG symposia on geodesy for geotechnical and structural engineering, and to facilitate interdisciplinary * Andreas Wieser [email protected] Alessandro Capra [email protected] 1
Institute of Geodesy and Photogrammetry, ETH Zürich, Stefano-Franscini-Platz 5, 8093 Zürich, Switzerland
2
University of Modena and Reggio Emilia, Via Vignolese n. 905, 41100 Modena, Italy
exchange beyond this community. The program included more than 80 presentations which collectively covered methodic advances in modeling and data analysis as well as advances in measurement technology and instruments. Practical experience was reported through case studies ranging from geomonitoring, particularly landslides, glaciers, and subsidence, to monitoring of man-made structures including dams, bridges, tunnels, railway lines, and buildings. The contributing authors were invited to submit revised versions of their papers to the Journal of Applied Geodesy or to Applied Geomatics for publication in a special issue, respectively. Seven papers were submitted to Applied Geomatics. They were subject to the normal peer review process. The four papers collected in the present issue have been accepted based on the reviews. Frukacz et al. (2017) analyze four aspects representing limitations for the detection of small displacements within a network of prisms observed autonomously by robotic total stations in a remote, alpine location. They show significant impact of an extra protective housing of the instruments, of apparent diurnal rotations of the rock on which the p
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