Damage and Flood Proxy Maps Developed for Isaias
In response to Tropical Storm/Hurricane Isaias, the NASA Earth Applied Sciences Disasters program area created maps showing areas of likely flooding and damage from the July 2020 storm in The Bahamas and Dominican Republic.
The U.S. Southern Command and Caribbean Disasters Emergency Management Agency requested and received these detailed assessment maps following the heavy rains that occurred during the storm.
These maps are based on synthetic aperture radar (SAR) data from the Copernicus Sentinel-1 satellites, which are operated by the European Space Agency. The Advanced Rapid Imaging and Analysis (ARIA) team at NASA's Jet Propulsion Laboratory and the California Institute of Technology in Pasadena, California processed the data in collaboration with the Earth Observatory of Singapore.
Radar imaging relies on emitting a signal toward a surface and then recording the amount of signal that bounces back and its time delay. SAR uses an electromagnetic signal that travels at the speed of light and produces fine-resolution images.
The Disasters program area develops damage and flood risk mapping through the following NASA-funded program ROSES projects:
- A.37 Global Rapid Damage Mapping System with Spaceborne Synthetic Aperture Radar (SAR) Data
- A.50 Group on Earth Observation (GEO) Work Programme Global Rapid Flood Mapping Project
These maps can be interacted with and used for GIS applications on the Disasters Mapping Portal here.