Date of Images:

9/29/2022, 10/2/2022, 10/3/2022, 10/4/2022

Date of Next Image:

N/A

Summary:

RADARSAT-2 and MSFC Sentinel-1:

Scientists at NASA's Marshall Space Flight Center created these water extents on September 29, 2022 using the RADARSAT-2 Synthetic Aperture Radar (SAR) instrument. These images can be used to see where open water is visible at the time of the satellite overpass. This product shows all water detected and differentiates between normal water areas and some flooded areas. This product was classified using the USDA Crop Data Layer for 2021. It's important to note that all flooded areas may not be captured do to the sensors limitations of not being able to "see" through vegetation and buildings. To determine where additional flooding may have occurred, combine this layer with other data sets.

ARIA Flood Proxy Map:

This Flood Proxy Map (FPM) depicts areas that are likely flooded in Florida due to Hurricane Ian. This map was derived from synthetic aperture radar (SAR) images acquired by the Copernicus Sentinel-1 satellites operated by the European Space Agency (ESA) before (9/30/2021) and after (10/2/2022) the event.

Dartmouth Flood Observatory at the University of Colorado and NASA GSFC PlanetScope, Sentinel-1, and MODIS:

Potentially flooded area created using PlanetScope imagery from October 2, 2022, October 3, 2022, and October 4, 2022 using a beta PlanetScope Flood Mapping system created in partnership between NASA GSFC and Dartmouth Flood Observatory at the University of Colorado.

Potentially flooded area created using Sentinel-1 SAR data from October 2, 2022. The product is processed by the Dartmouth Flood Observatory at the University of Colorado, from Copernicus/European Space Agency Sentinel 1 SAR data. The NASA Earth Sciences Program provided funding to the University for Colorado for this work.

Potentially flooded area created using MODIS data from September 30, 2022, October 2, 2022, and October 3, 2022. The product is processed by the Dartmouth Flood Observatory at the University of Colorado, MODIS instrument on the Terra and Aqua satellites. The NASA Earth Sciences Program provided funding to the University for Colorado for this work.

Suggested Use:

RADARSAT-2 and MSFC Sentinel-1:

This product shows water that is detected by the sensor with different colors indicating different land cover/land use classifications from the USDA Crop Data Layer for 2021 that appear to have water and are potentially flooded.

Blue (1): Known Water
Red (2): Anomalous Water
Green (3): Flooded Wetlands
Brown (4): Flooded Croplands
Purple (5): Potentially Flooded Developed Areas (Low Confidence)
(0): No Data

ARIA Flood Proxy Map:

Dark red pixels indicate areas that are likely flooded.

This flood proxy map should be used as a guide to identify areas that are likely flooded, and is less reliable over urban and vegetated areas.

Caveats: the majority of developed areas were filtered out due the capabilities of the sensor to detect urban flooding. As a result, these images may not detect all flooding and some potentially flooded developed areas could be inaccurate.

Dartmouth Flood Observatory at the University of Colorado and NASA GSFC PlanetScope, Sentinel-1, and MODIS:

In some cases, responders need this information only during the event. In many others, "building back better" requires accurate knowledge of what land areas were flooded, and also how large the event was compared to previous events.

Input from disaster responders, flood risk analysts, and all others seeking information of what land was flooded during major events is welcomed. In many cases, Dartmouth Flood Observatory can produce information products tailored to end user GIS systems and analysis objectives. Write to Robert.Brakenridge@Colorado.edu or Albert.Kettner@Colorado.edu

Satellite/Sensor:

RADARSAT-2 Synthetic Aperture Radar (SAR)

Copernicus Sentinel-1 Synthetic Aperture Radar (SAR)

PlanetScope

MODIS

Resolution:

PlanetScope: 3 meters

RADARSAT-2: ~20 meters

Sentinel-1: 30 meters

MODIS: 250 meters

Credits:

NASA Disasters Program, Dartmouth Flood Observatory at the University of Colorado, NASA MSFC, NASA GSFC

RADARSAT-2: This service contains modified RADARSAT-2 data, collected through Hazards Data Distribution System (HDDS)-USGS; post-processing and data product development performed by NASA Marshall Space Flight Center. RADARSAT-2 Data and Products © Maxar Technologies Ltd. (2022) - All Rights Reserved. RADARSAT is an official mark of the Canadian Space Agency.

Sentinel-1: Sentinel data used in this derived product, contains modified Copernicus Sentinel data (2022), processed by ESA, Alaska Satellite Facility, NASA Marshall Space Flight Center

The FPM contains modified Copernicus Sentinel data (2021-2022), processed by the European Space Agency and analyzed by the NASA-JPL/Caltech ARIA team. Part of the funding was provided by NASA's Earth Applied Sciences Disasters Program.

Esri REST Endpoint:

See URL section on the right side of page.

WMS Endpoint:

https://maps.disasters.nasa.gov/ags04/services/hurricane_ian_2022/water_extents/MapServer/WMSServer

Data Download:

DFO PlanetScope (flood extent): https://maps.disasters.nasa.gov/download/gis_products/event_specific/2022/hurricane_ian_2022/planet/dfo_gsfc/

DFO Sentinel 1: https://maps.disasters.nasa.gov/download/gis_products/event_specific/2022/hurricane_ian_2022/sentinel1/dfo/

DFO MODIS: https://maps.disasters.nasa.gov/download/gis_products/event_specific/2022/hurricane_ian_2022/modis/

Radarsat 2: https://maps.disasters.nasa.gov/download/gis_products/event_specific/2022/hurricane_ian_2022/radarsat2/

ARIA FPM: https://maps.disasters.nasa.gov/download/gis_products/event_specific/2022/hurricane_ian_2022/aria/

MSFC Sentinel-1: https://maps.disasters.nasa.gov/download/gis_products/event_specific/2022/hurricane_ian_2022/sentinel1/

Groups