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Dual-Pol Radar Built-Up Area Index for Urban Area Mapping Using Sentinel-1 SAR Data
Journal
International Geoscience and Remote Sensing Symposium (IGARSS)
Date Issued
2022-01-01
Author(s)
Verma, Abhinav
Dey, Subhadip
Lopez-Martinez, Carlos
Bhattacharya, Avik
Gamba, Paolo
Abstract
Built-up area (BA) mapping is vital for understanding the effect of the urban regions on the environment, thereby supporting sustainable development. This study proposes a new dual-pol radar built-up area index (DpRBI) to detect the BA using Sentinel-1 SAR data. The DpRBI formulation is based on the three Stokes vector elements of the scattered wave derived from the 2 × 2 covariance matrix C2. This study uses the Sentinel-1 SAR data sets over Milan, Italy and Barcelona, Spain to map the BA using DpRBI. The overall accuracy of the BA extracted using the proposed technique was found to be 84.19% and 87.95% over Milan and Barcelona, respectively. It is noteworthy that even relatively small low-density BA is precisely classified using the proposed built-up index.
Volume
2022-July
Subjects