Article

On the use of multipolarization satellite SAR data for coastline extraction in harsh coastal environments: the case of Solway Firth

Details

Citation

Ferrentino E, Buono A, Nunziata F, Marino A & Migliaccio M (2020) On the use of multipolarization satellite SAR data for coastline extraction in harsh coastal environments: the case of Solway Firth. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 14, pp. 249-257. https://doi.org/10.1109/jstars.2020.3036458

Abstract
This study deals with coastline extraction using multipolarization spaceborne synthetic aperture radar (SAR) imagery acquired over coastal intertidal areas. The latter are very challenging environments where mud flats lead to a large variability of normalized radar cross section, which may trigger a significant number of false edges during the extraction process. The performance of SAR-based coastline extraction methods that rely on a joint combination of multipolarization information (either single- or dual-polarization metrics) and speckle filtering (either local and nonlocal approaches) are analyzed using global positioning system (GPS) samples and colocated SAR imagery collected under different incidence angles. Our test site is an intertidal zone with a wetland (i.e., salt marsh) in the Solway Firth, south-west along the Scottish-English border. Experimental results, obtained processing a pair of RadarSAT-2 full-polarimetric and a pair of Sentinel-1 dual-polarimetric SAR imagery augmented by colocated GPS samples, show that: first, the multipolarization information outperforms the single-polarization counterpart in terms of extraction accuracy; second, among the single-polarization channels, the cross-polarized one performs best; third, both single- and dual-polarization methods perform better when nonlocal speckle filtering is applied; fourth, the joint combination of nonlocal speckle filter and dual-polarization information provides the best accuracy; and finally, the incidence angle plays a role in the extraction accuracy with larger incidence angles resulting in the best performance when dual-polarization metric is used.

Keywords
Coastal areas; coastline extraction; polarization; solway firth; synthetic aperture radar (SAR)

Journal
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing: Volume 14

StatusPublished
Publication date31/12/2020
Publication date online06/11/2020
Date accepted by journal06/11/2020
URLhttp://hdl.handle.net/1893/32158
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
ISSN1939-1404
eISSN2151-1535

People (1)

People

Dr Armando Marino
Dr Armando Marino

Senior Lecturer in Earth Observation, Biological and Environmental Sciences