Authors:
Fabio Luca Bonali
1
;
2
;
Luca Fallati
2
;
Varvara Antoniou
3
;
Kyriaki Drymoni
4
;
Federico Pasquaré Mariotto
5
;
Noemi Corti
2
;
Alessandro Tibaldi
1
;
2
;
Agust Gudmundsson
4
and
Paraskevi Nomikou
3
Affiliations:
1
CRUST- Interuniversity Center for 3D Seismotectonics with Territorial Applications, Italy
;
2
Department of Earth and Environmental Sciences, University of Milano-Bicocca, Piazza della Scienza 4, Ed. U04, 20126, Milan, Italy
;
3
Department of Geology and Geoenvironment, National and Kapodistrian University of Athens, Panepistimioupoli Zografou, 15784 Athens, Greece
;
4
Department of Earth Sciences, Queen's Building, Royal Holloway University of London, Egham, Surrey TW20 0EX, U.K.
;
5
Department of Human and Innovation Sciences, Insubria University, Via S. Abbondio 12, 22100 Como, Italy
Keyword(s):
Virtual Outcrops, Photogrammetry, Structure from Motion, Santorini Volcano, Caldera, Dykes.
Abstract:
In the present work, we test the application of boat-camera-based photogrammetry as a tool for Virtual Outcrops (VOs) building on geological mapping and data collection. We used a 20 MPX camera run by an operator who collected pictures almost continuously, keeping the camera parallel to the ground and opposite to the target during a boat survey. Our selected target was the northern part of Santorini’s caldera wall, a structure of great geological interest. A total of 887 pictures were collected along a 5.5-km-long section along an almost vertical caldera outcrop. The survey was performed at a constant boat speed of about 4 m/s and a coastal approaching range of 35.8 to 296.5m. Using the Structure from Motion technique we: i) produced a successful and high-resolution 3D model of the studied area, ii) designed high-resolution VOs for two selected caldera sections, iii) investigated the regional geology, iv) collected qualitative and quantitative structural data along the vertical calde
ra cliff, and v) provided a new VO building approach in extreme logistic conditions.
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