20260414 15255600 1.0 TRUE 150000000 5000 ItemDescription (EXERCISE - DaNCE March 2026) Copernicus Sentinel-2 Normalized Different Water Index (NDWI) for Hurricane Florence September 2018 <div style='text-align:Left;'><div><div><p><span style='font-weight:bold;'>Dates of Images:</span></p><p><span style='font-style:italic;'>Post-Event: </span><span>September 18, 2018</span></p><p><span style='font-style:italic;'>Pre-Event: </span><span>August 29, 2018</span></p><p><span style='font-weight:bold;'>Date of Next Image:</span></p><p><span>None</span></p><p><span style='font-weight:bold;'>Summary:</span></p><p><span>Normalized Difference Water Index (NDWI) provides a different view of the Earth's surface combining different bands to make water bodies more obvious. This index can be used to identify flooded areas as well as heavily saturated areas.</span></p><p><span style='font-weight:bold;'>Suggested Use:</span></p><p><span>For NDWI, areas of existing water, such as a rivers or lakes appear in the darkest green with high values near 1, while dry land appears in the darkest brown with low values near -1. This product can be used to identify potentially flooded areas that can be seen in varying shades of green and light brown depending on the amount of moisture picked up by the satellite. Note: Areas of cloud cover will show up in varying shades of green/blue similar to water.</span></p><p><span style='font-weight:bold;'>Satellite/Sensor:</span></p><p><span>MultiSpectral Instrument (MSI) on European Space Agency's (ESA) Copernicus Sentinel-2A/2B satellites</span></p><p><span style='font-weight:bold;'>Resolution:</span></p><p><span>10 meters</span></p><p><span style='font-weight:bold;'>Credits:</span></p><p><span>NASA/MSFC, USGS, ESA Copernicus</span></p><p><span style='font-weight:bold;'>Esri REST Endpoint:</span></p><p><span>See URL to the right.</span></p><p><span style='font-weight:bold;'>WMS:</span></p><p><span>https://gis.earthdata.nasa.gov/gis05/services/DISASTERS_202512_FLOOD_WA/2512_sentinel2_mndwi/ImageServer/WMSServer</span></p></div></div></div> NASA/MSFC, USGS, ESA Copernicus ESA Copernicus Sentinel-2 Flood Atmospheric River NASA Disasters NASA NDWI Normalized Different Water Index <div style='text-align:Left;'><div><p><span>NASA data and products are freely available to federal, state, public, non-profit and commercial users. This information can be experimental- or research-grade data products and may not be appropriate for operational use. These NASA data products, services, and the Disasters Mapping Portal are intended to aid decision makers and enhance situational awareness, but these data are not guaranteed to be consistently available or routinely updated. Use of this product should include: "Contains modified Copernicus Sentinel data (2025) processed by ESA"</span></p></div></div> ex2601_sentinel2_ndwi 20260414