Jo, MJ, Osmanoglu, B, Zhang, B et al. (2018). Flood extent mapping using dual-polarimetric sentinel-1 synthetic aperture Radar imagery
. The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 42(3), 711-713. 10.5194/isprs-archives-XLII-3-711-2018
Jo, MJ, Osmanoglu, B, Zhang, B et al. (2018). Flood extent mapping using dual-polarimetric sentinel-1 synthetic aperture Radar imagery
. The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 42(3), 711-713. 10.5194/isprs-archives-XLII-3-711-2018
Rapid generation of synthetic aperture radar (SAR) based flood extent maps provide valuable data in disaster response efforts thanks to the cloud penetrating ability of microwaves. We present a method using dual-polarimetric SAR imagery acquired on Sentinel-1a/b satellites. A false-colour map is generated using pre- and post-disaster imagery, allowing operators to distinguish between existing standing water pre-flooding, and recently flooded areas. The method works best in areas of standing water and provides mixed results in urban areas. A flood depth map is also estimated by using an external DEM. We will present the methodology, it's estimated accuracy as well as investigations into improving the response in urban areas.
