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      Fully Convolutional Neural Network for Rapid Flood Segmentation in Synthetic Aperture Radar Imagery

      , , ,
      Remote Sensing
      MDPI AG

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          Abstract

          Rapid response to natural hazards, such as floods, is essential to mitigate loss of life and the reduction of suffering. For emergency response teams, access to timely and accurate data is essential. Satellite imagery offers a rich source of information which can be analysed to help determine regions affected by a disaster. Much remote sensing flood analysis is semi-automated, with time consuming manual components requiring hours to complete. In this study, we present a fully automated approach to the rapid flood mapping currently carried out by many non-governmental, national and international organisations. We design a Convolutional Neural Network (CNN) based method which isolates the flooded pixels in freely available Copernicus Sentinel-1 Synthetic Aperture Radar (SAR) imagery, requiring no optical bands and minimal pre-processing. We test a variety of CNN architectures and train our models on flood masks generated using a combination of classical semi-automated techniques and extensive manual cleaning and visual inspection. Our methodology reduces the time required to develop a flood map by 80%, while achieving strong performance over a wide range of locations and environmental conditions. Given the open-source data and the minimal image cleaning required, this methodology can also be integrated into end-to-end pipelines for more timely and continuous flood monitoring.

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          Contributors
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          Journal
          Remote Sensing
          Remote Sensing
          MDPI AG
          2072-4292
          August 2020
          August 06 2020
          : 12
          : 16
          : 2532
          Article
          10.3390/rs12162532
          831397a6-347b-493a-966e-a360d74f64a2
          © 2020

          https://creativecommons.org/licenses/by/4.0/

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