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|Authors: ||Pesci, A.*|
|Title: ||A laser scanning-based method for fast estimation of seismic-induced building deformations|
|Title of journal: ||ISPRS Journal of Photogrammetry and Remote Sensing|
|Series/Report no.: ||/79(2013)|
|Publisher: ||Elsevier Science Limited|
|Issue Date: ||28-Feb-2013|
|Abstract: ||Monitoring damaged buildings in an area where an earthquake has occurred requires the use of techniques
which provide rapid and safe measurements even in emergency conditions. In particular, remote
sensing techniques like terrestrial laser scanning (TLS) can satisfy these requirements, since they produce
very dense point clouds in little time and also allow an accurate geometric modeling of observed buildings.
Nevertheless, strong constraints on TLS data acquisition geometry, such as acquisition distance and
incidence angles, typically characterize an area in seismic emergency conditions. In order to correctly
interpret the data, it is necessary to estimate errors affecting TLS measurements in these critical conditions.
A reliable estimation can be achieved by means of experiments and numerical simulations aimed
at quantifying a realistic noise level, with emphasis on reduction of artifacts due to data acquisition, registration
and modeling. This paper proposes a data analysis strategy in which TLS-based morphological
maps computed as point-to-primitive differences are created. The method can be easily used for accurate
surveying in emergency conditions. In order to demonstrate the proposed method in very diverse
situations, it was applied to rapidly detect deformation traces in the San Giacomo Roncole Campanile
(Modena), the Asinelli tower (Bologna) and the Cantalovo Church (Verona), three buildings damaged
by the Mw 5.9 Emilia Romagna 2012 earthquake (Italy).
2013 International Society for Photogrammetry and Remote Sensing, Inc. (ISPRS) Published by Elsevier|
|Appears in Collections:||04.06.06. Surveys, measurements, and monitoring|
Papers Published / Papers in press
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