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Sensors (Basel). 2019 May 16;19(10). pii: E2261. doi: 10.3390/s19102261.

Application of Hyperspectral Imaging to Underwater Habitat Mapping, Southern Adriatic Sea.

Author information

1
National Research Council, Institute of Marine Sciences, Via Gobetti 101, 40129 Bologna, Italy. federica.foglini@bo.ismar.cnr.it.
2
National Research Council, Institute of Marine Sciences, Via Gobetti 101, 40129 Bologna, Italy. valentina.grande@bo.ismar.cnr.it.
3
Department of Earth and Environmental Sciences and CoNISMa LRU, University of Milano - Bicocca, Piazza della Scienza 1, 20126 Milano, Italy. fabio.marchese1@unimib.it.
4
Department of Earth and Environmental Sciences and CoNISMa LRU, University of Milano - Bicocca, Piazza della Scienza 1, 20126 Milano, Italy. valentina.bracchi@unimib.it.
5
National Research Council, Institute of Marine Sciences, Via Gobetti 101, 40129 Bologna, Italy. mariacristina.prampolini@bo.ismar.cnr.it.
6
National Research Council, Institute of Marine Sciences, Via Gobetti 101, 40129 Bologna, Italy. lorenzo.angeletti@bo.ismar.cnr.it.
7
National Research Council, Institute of Marine Sciences, Via Gobetti 101, 40129 Bologna, Italy. giorgio.castellan@bo.ismar.cnr.it.
8
Department for the Cultural Heritage, University of Bologna, Via degli Ariani 1, 48121 Ravenna, Italy. giorgio.castellan@bo.ismar.cnr.it.
9
Department of Biology and CoNISMa LRU, University of Bari, Via Orabona 4, 70124 Bari, Italy. giovanni.chimienti@uniba.it.
10
Ecotone AS, Pirsenteret Havnegata 9, inngang 1 ⁻ 3 etg, 7010 Trondheim, Norway. ingrid@ecotone.com.
11
Ecotone AS, Pirsenteret Havnegata 9, inngang 1 ⁻ 3 etg, 7010 Trondheim, Norway. magne@ecotone.com.
12
Department of Earth and Environmental Sciences and CoNISMa LRU, University of Milano - Bicocca, Piazza della Scienza 1, 20126 Milano, Italy. a.meroni9@campus.unimib.it.
13
National Research Council, Institute of Marine Sciences, Via Gobetti 101, 40129 Bologna, Italy. alessandra.mercorella@bo.ismar.cnr.it.
14
Department of Earth and Environmental Sciences and CoNISMa LRU, University of Milano - Bicocca, Piazza della Scienza 1, 20126 Milano, Italy. agostina.vertino@unimib.it.
15
Ghent University, Campus Ufo, Rectorate, Sint-Pietersnieuwstraat 25, B-9000 Ghent, Belgium. agostina.vertino@unimib.it.
16
National Research Council, Institute for the Study of Anthropic Impacts and Sustainability in Marine EnvironmentsVia Giovanni da Verrazzano 17, 91014 Castellammare del Golfo, Trapani, Italy. fabio.badalamenti@cnr.it.
17
Department of Earth and Environmental Sciences and CoNISMa LRU, University of Milano - Bicocca, Piazza della Scienza 1, 20126 Milano, Italy. cesare.corselli@unimib.it.
18
Ecotone AS, Pirsenteret Havnegata 9, inngang 1 ⁻ 3 etg, 7010 Trondheim, Norway. ivar@ecotone.com.
19
National Research Council, Institute of Environmental Geology and Geoengineering, Via Salaria km 29,300, 00015 Monterotondo, Rome, Italy. eleonora.martorelli@uniroma1.it.
20
Department of Earth and Environmental Sciences and CoNISMa LRU, University of Milano - Bicocca, Piazza della Scienza 1, 20126 Milano, Italy. alessandra.savini@unimib.it.
21
National Research Council, Institute of Marine Sciences, Via Gobetti 101, 40129 Bologna, Italy. marco.taviani@bo.ismar.cnr.it.
22
Biology Department, Woods Hole Oceanographic Institution, 266 Woods Hole Road, Woods Hole, MA 02543, USA. marco.taviani@bo.ismar.cnr.it.
23
Stazione Zoologica Anton Dohrn, Villa Comunale, 80121 Naples, Italy. marco.taviani@bo.ismar.cnr.it.

Abstract

Hyperspectral imagers enable the collection of high-resolution spectral images exploitable for the supervised classification of habitats and objects of interest (OOI). Although this is a well-established technology for the study of subaerial environments, Ecotone AS has developed an underwater hyperspectral imager (UHI) system to explore the properties of the seafloor. The aim of the project is to evaluate the potential of this instrument for mapping and monitoring benthic habitats in shallow and deep-water environments. For the first time, we tested this system at two sites in the Southern Adriatic Sea (Mediterranean Sea): the cold-water coral (CWC) habitat in the Bari Canyon and the Coralligenous habitat off Brindisi. We created a spectral library for each site, considering the different substrates and the main OOI reaching, where possible, the lower taxonomic rank. We applied the spectral angle mapper (SAM) supervised classification to map the areal extent of the Coralligenous and to recognize the major CWC habitat-formers. Despite some technical problems, the first results demonstrate the suitability of the UHI camera for habitat mapping and seabed monitoring, through the achievement of quantifiable and repeatable classifications.

KEYWORDS:

Adriatic Sea; cold-water coral; coralligenous; habitat mapping; hyperspectral camera; spectral library

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