Geodaysit 2023

Hyperspectral PRISMA and Sentinel-2 Preliminary Assessment Comparison in Archaeological Sites
06-13, 09:45–10:00 (Europe/London), Sala Videoconferenza @ PoliBa

Over the last decades, remote sensing techniques have contributed to supporting cultural
heritage studies and management, including archaeological sites as well as their territorial context and
geographical surroundings. This paper aims to investigate the capabilities and limitations of the new
hyperspectral sensor PRISMA (Precursore IperSpettrale della Missione Applicativa) by the Italian
Space Agency (ASI), still little applied to archaeological studies. The PRISMA sensor was tested on
Italian terrestrial (Alba Fucens, Massa D’Albe, L’Aquila) and marine (Sinuessa, Mondragone, Caserta)
archaeological sites. A comparison between PRISMA hyperspectral imagery and the well-known
Sentinel-2 Multi-Spectral Instrument (MSI) was performed in order to better understand features and
outputs useful to investigate the aforementioned areas. At first, bad bands analysis and noise removal
were performed, in order to delete the numerically corrupted bands. Principal component analysis
(PCA) was carried out to highlight invisible details in the original image; then, spectral signatures of
representative areas were extracted and compared to Sentinel-2 data. At last, a classification analysis
(ML and SAM) was performed both on PRISMA and Sentinel-2 imagery. The results showed a full
agreement between Sentinel and PRISMA data, enhancing the capability of PRISMA in extrapolating
more spectral information and providing a better reliability in the extraction of the features.
these first analyses, applied in landscape archaeology studies, highlight
the great spectral operational capabilities of the PRISMA sensor. In future studies, a great
advantage can be brought by performing a reliable pansharpening in order to increase
the resolution of the final images (geometric resolution from pancromathic and spectral
resolution from hyperspectral data), as well as a more stable multitemporal acquisition in
the areas under investigation.

Fixed-term university researcher at the Department of Civil, Construction-Architectural and Environmental Engineering (DICEAA) of University of L'Aquila in Topography and Cartography (S.S.D. ICAR/06), SC 08/A4 - Geomatics. In 2021 she obtained the European PhD in Civil, Construction-Architectural and Environmental Engineering at University of L'Aquila, spending a period as a PhD visiting student for 6 months at CTTC (Centre Tecnològic Telecomunicacions Catalunya) in Castelldefels, Barcelona, ​​dealing with the processing of SAR and optical data for the study of coastal areas. Subsequently, she was a research fellow at the DICEAA. She currently is the professor holder the course Elements of topography and cartography of Construction-Architectural Engineering and collaborates in teaching activities for topography and geomatics courses of Civil and Environmental Engineering and for the course in Civil protection techniques and territorial security at the UNIVAQ, DICEAA. She is topography and geomatics subject expert . She is co-supervisor of degree theses in the same field. Shee participates in projects of national and international interest, organizes and actively participates in national and international conferences related to the Geomatics field. She won the IEEE-GRS29-CNI-SI 2021 award for the 3 best PhD theses in geosciences and remote sensing and is member of journal editorial boards.

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Research Geologist