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Assessment of Coastal Aquaculture for India from Sentinel-1 SAR Time Series

Prasad, Kumar Arun and Ottinger, Marco and Wei, Chunzhu and Leinenkugel, Patrick (2019) Assessment of Coastal Aquaculture for India from Sentinel-1 SAR Time Series. Remote Sensing, 11 (357), pp. 1-17. Multidisciplinary Digital Publishing Institute (MDPI). DOI: 10.3390/rs11030357 ISSN 2072-4292

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Official URL: http://www.mdpi.com/2072-4292/11/3/357/htm

Abstract

Aquaculture is one of the fastest growing primary Food production sectors in India and ranks second behind China. Due to its growing economic value and global demand, India’s aquaculture industry experienced exponential growth for more than one decade. In this study, we extract land-based aquaculture at the pond level for the entire coastal zone of India using large-volume time series Sentinel-1 synthetic-aperture radar (SAR) data at 10-m spatial resolution. Elevation and slope from Shuttle Radar Topographic Mission digital elevation model (SRTM DEM) data were used for masking inappropriate areas, whereas a coastline dataset was used to create a land/ocean mask. The pixel-wise temporal median was calculated from all available Sentinel-1 data to significantly reduce the amount of noise in the SAR data and to reduce confusions with temporary inundated Rice fields. More than 3000 aquaculture pond vector samples were collected from high resolution Google. Earth imagery and used in an object-based image classification approach to exploit the characteristic shape information of aquaculture ponds. An open-source connected component Segmentation algorithm was used for the extraction of the ponds based on the difference in backscatter intensity of inundated surfaces and shape metrics calculated from aquaculture samples as input parameters. This study, for the first time, provides spatial explicit information on aquaculture distribution at the pond level for the entire coastal zone of India. Quantitative spatial analyses were performed to identify the provincial dominance in aquaculture production, such as that revealed in Andhra Pradesh and Gujarat provinces. For accuracy assessment, 2000 random samples were generated based on a stratified random sampling method. The study demonstrates, with an overall accuracy of 0.89, the spatio-temporal transferability of the methodological framework and the high potential for a global-scale application.

Item URL in elib:https://elib.dlr.de/126476/
Document Type:Article
Title:Assessment of Coastal Aquaculture for India from Sentinel-1 SAR Time Series
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Prasad, Kumar ArunUNSPECIFIEDUNSPECIFIED
Ottinger, MarcoMarco.Ottinger (at) dlr.deUNSPECIFIED
Wei, ChunzhuUNSPECIFIEDUNSPECIFIED
Leinenkugel, Patrickpatrick.leinenkugel (at) dlr.deUNSPECIFIED
Date:11 February 2019
Journal or Publication Title:Remote Sensing
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:No
Volume:11
DOI :10.3390/rs11030357
Page Range:pp. 1-17
Publisher:Multidisciplinary Digital Publishing Institute (MDPI)
ISSN:2072-4292
Status:Published
Keywords:aquaculture; food security; India; Asia; coast; Sentinel-1; Copernicus; SAR; time series; object-based image analysis (OBIA)
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Geowissenschaftl. Fernerkundungs- und GIS-Verfahren
Location: Oberpfaffenhofen
Institutes and Institutions:German Remote Sensing Data Center > Land Surface Dynamics
Deposited By: Leinenkugel, Patrick
Deposited On:13 Feb 2019 12:59
Last Modified:21 Sep 2019 05:06

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