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Terrestrial Laser Scanner, Terrestrial SAR-RAR and topographic data: an integration proposal for monitoring the temple of Sagrada Familia in Barcelona
Marambio Castillo, Alejandro Esteban; Pucci, Barbara; Jungner, Andreas; Núñez Andrés, María Amparo; Buill Pozuelo, Felipe
Universitat Politècnica de Catalunya. Departament de Construccions Arquitectòniques I; Universitat Politècnica de Catalunya. Departament d'Expressió Gràfica Arquitectònica II; Universitat Politècnica de Catalunya. Departament d'Enginyeria del Terreny, Cartogràfica i Geofísica; Universitat Politècnica de Catalunya. CPSV - Centre de Política de Sòl i Valoracions; Universitat Politècnica de Catalunya. EGEO - Enginyeria Geomàtica
In this paper three techniques are proposed to be integrated: Terrestrial Synthetic Aperture Radar, Terrestrial Laser Scanner and Traditional Topography. Terrestrial Synthetic Aperture Radar (SAR) is an evolving instrument that can be been used to detect deformations with high accuracy. The Ground-Based SAR instrument used in this paper has an intrinsic accuracy of submillimeter level which makes it suitable for high accuracy deformation detection. It is however fundamental to be able to geo-reference radar deformation data to an accurate surface model of the area of interest. This was accomplished using a terrestrial laser scanner. The use of a terrestrial laser scanner allowed a full facade overview analysis. A high resolution 3D model has been created by registering and optimizing the scanner’s raw data point clouds, creating and editing a polygonal model and texturizing the result with high resolution photos. The created digital 3D model, is not only a virtual reproduction, useful in visualization and exploration applications, it has also been used to collect all survey results at different levels of integration into one single environment. By using the DSM generated from laser scanner a geocoding of GB-SAR data was possible while, at the same time, the digital model was georeferenced in the UTM (ED50) 31N Cartographic Coordinates System by using GPS static observations to establish a reference base from which coordinates of the elements were observed using a non-prism total station. The paper describes in detail all the data collection process during the survey campaign, the three levels of data elaboration and interpretation, and the algorithm for the assessment of the GB-SAR-RAR geocoding.
Àrees temàtiques de la UPC::Enginyeria civil::Geomàtica
Remote-sensing images -- Data processing
Topographical drawing -- Data processing
Escàner, Sistemes d'
Fotogrametria digital
Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/conferenceObject
         

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