FEMA remote sensing for flooded areas in Puerto Rico and US Virgin Islands

Days after Hurricane Maria made landfall in Puerto Rico on September 20, 2017, the Federal Emergency Management Agency (FEMA) responded by assessing the extent of flooding hazard in Puerto Rico and the US Virgin Islands. Two mapping systems for remote sensing were used, Copernicus EMS and the NASA NASA MSFC SPoRT. The resulting raster images for flooding extent represented central and eastern Puerto Rico, but did not include the western segment of the island which was Hurricane Maria's exit trajectory.

The imagery files were taken from the FEMA data services. Please refer to the FEMA website for the original files and inference methods:
https://data.femadata.com/NationalDisasters/HurricaneMaria/Data/RemoteSensing/FEMA_FloodDetectionMaps/

2017年9月20日，飓风玛丽亚（Hurricane Maria）在波多黎各登陆后数日，美国联邦紧急事务管理局（Federal Emergency Management Agency，FEMA）随即启动响应工作，对波多黎各及美属维尔京群岛的洪涝灾害风险范围展开评估。本次评估采用两套遥感制图系统：哥白尼应急管理服务（Copernicus EMS）与美国国家航空航天局马歇尔太空飞行中心太空气象预报与研究小组（NASA MSFC SPoRT）。所生成的洪涝范围栅格图像覆盖了波多黎各中部与东部区域，但未包含该岛屿西部区段——此处为飓风玛丽亚的过境撤离路径。

该图像数据集源自FEMA数据服务平台。如需获取原始文件及相关推理方法，请访问FEMA官方网站：https://data.femadata.com/NationalDisasters/HurricaneMaria/Data/RemoteSensing/FEMA_FloodDetectionMaps/