Geometric characterizaton of cylinder-shaped structure from laser scanner data: Development of an analysis tool and its use on a leaning bell tower
Material type: ArticleDescription: 13 pISBN:- 1296-2074
Item type | Current library | Call number | Status | Date due | Barcode |
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Article de revista | Biblioteca de l' Escola Superior Conservació i Restauració de Bens Culturals de Catalunya | Journal of Cultural Heritage 5 (Browse shelf(Opens below)) | Available | Art-179 |
The romanesque-byzantine style, 1000 years old leaning bell tower of Caorle (Venice, Italy) is a unique masonry structure, characterized by single and double lancet windows harmonically distributed on a cylinder-shaped shaft surmounted by a conic cusp. A terrestrial laser scanning (TLS) survery was carried out in 2011 and some analyses were performed on the resulting point cloud to provide the following: bell tower leaning angle, wall inclination/tapering and radius, local deviation from circular shape, and local curvature. Emphasis was placed on the changes of these quantities with elevation. In order to perform these analyses, a MATLAB/Octave toolbox was developed and is available as supplementary material of this paper. In this way, a reliable picture of the urrent geometry of the ball tower was obtained. In particular, a correlaton between learning angle (avarage value 1.4° towards East-South-East) and some surface deformations and damage (bulges, brick, displacements or also material loss) was found. These results ae used for cultural heritage preservation purposes.
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