Geoinformatics Unit

Preliminary Flood Mapping in East Japan after the Typhoon Hagibis

October 14, 2019

On October 12, 2019, the Typhoon Hagibis hit East Japan, triggering floods and landslides. The Geoinformatics Unit, RIKEN Center for Advanced Intelligence Project conducted a preliminary mapping of the affected areas using Sentinel-1 SAR data provided by ESA.

To detect the flooded areas, we carried out a change detection analysis using a pre-event SAR data acquired on October 6, 2019, and a post-event SAR data from October 13 (local time), 2019. The image below shows the color composite of Sentinel-1 images and the detected flooded areas (blue segments) in Tochigi and Fukushima, Japan.

Further Information

Sentinel Asia LINK

Disclaimer

The information contained in the map is for general information purposes only. The accuracy of the analysis is not assessed yet. The information is provided by Geoinformatics Unit and while we endeavor to keep the information up to date and correct, we make no representations or warranties of any kind, express or implied, about the completeness, accuracy, reliability, suitability or availability with respect to the map or the information, products, services, or related graphics contained on it for any purpose. Any reliance you place on such information is therefore strictly at your own risk.

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The color composite of Sentinel-1 images and the detected flooded areas (blue segments) in Tochigi and Fukushima, Japan.