title: UAV-Based Photogrammetry and Integrated Technologies for Architectural Applications--Methodological Strategies for the After-Quake Survey of Vertical Structures in Mantua (Italy).
abstract: This paper examines the survey of tall buildings in an emergency context like in the case of post-seismic events. The after-earthquake survey has to guarantee time-savings, high precision and security during the operational stages. The main goal is to optimize the application of methodologies based on acquisition and automatic elaborations of photogrammetric data even with the use of Unmanned Aerial Vehicle (UAV) systems in order to provide fast and low cost operations. The suggested methods integrate new technologies with commonly used technologies like TLS and topographic acquisition. The value of the photogrammetric application is demonstrated by a test case, based on the comparison of acquisition, calibration and 3D modeling results in case of use of a laser scanner, metric camera and amateur reflex camera. The test would help us to demonstrate the efficiency of image based methods in the acquisition of complex architecture. The case study is Santa Barbara Bell tower in Mantua. The applied survey solution allows a complete 3D database of the complex architectural structure to be obtained for the extraction of all the information needed for significant intervention. This demonstrates the applicability of the photogrammetry using UAV for the survey of vertical structures, complex buildings and difficult accessible architectural parts, providing high precision results.
authors.affiliation: Department of Architecture, Built Environment and Construction Engineering, ABC, Politecnico di Milano, via Ponzio, Milano 31-20133, Italy. cristiana.achille@polimi.it.
authors.forename: Cristiana
authors.initials: C
authors.lastname: Achille
authors.affiliation: Department of Architecture, Built Environment and Construction Engineering, ABC, Politecnico di Milano, via Ponzio, Milano 31-20133, Italy. andrea.adami@polimi.it.
authors.forename: Andrea
authors.initials: A
authors.lastname: Adami
authors.affiliation: Department of Architecture, Built Environment and Construction Engineering, ABC, Politecnico di Milano, via Ponzio, Milano 31-20133, Italy. silvia.chiarini@polimi.it.
authors.forename: Silvia
authors.initials: S
authors.lastname: Chiarini
authors.affiliation: Department of Architecture, Built Environment and Construction Engineering, ABC, Politecnico di Milano, via Ponzio, Milano 31-20133, Italy. silvia.chiarini@polimi.it.
authors.forename: Stefano
authors.initials: S
authors.lastname: Cremonesi
authors.affiliation: Department of Architecture, Built Environment and Construction Engineering, ABC, Politecnico di Milano, via Ponzio, Milano 31-20133, Italy. francesco.fassi@polimi.it.
authors.forename: Francesco
authors.initials: F
authors.lastname: Fassi
authors.affiliation: Department of Architecture, Built Environment and Construction Engineering, ABC, Politecnico di Milano, via Ponzio, Milano 31-20133, Italy. luigi.fregonese@polimi.it.
authors.forename: Luigi
authors.initials: L
authors.lastname: Fregonese
authors.affiliation: Department of Architecture, Built Environment and Construction Engineering, ABC, Politecnico di Milano, via Ponzio, Milano 31-20133, Italy. laura.taffurelli@polimi.it.
authors.forename: Laura
authors.initials: L
authors.lastname: Taffurelli
keywords: UAV application; automated 3D modeling techniques; close range photogrammetry; cultural heritage; emergency context survey; tall buildings; terrestrial laser scanning; topographic survey