20250925 11253600 1.0 TRUE 150000000 5000 ItemDescription Planet NDVI and NDWI for the US Severe Weather April 2025. <div style='text-align:Left;'><div>Date of Image(s):Post-Event: April 7,2025; April 8, 2025Date of Next Image:UnknownSummary:Normalized Differential Vegetation Index (NDVI) maps are produced by converting pixel values to NDVI = (Red – NIR)/(Red + NIR), NIR indicates the near infrared band. The dynamically generated Normalized Difference Vegetation Index (NDVI) layer is an index for quantifying green vegetation. It reflects the state of vegetation health based on how vegetation reflects light at certain wavelengths.Normalized Differential Water Index (NDWI) maps are produced by converting pixel values to NDWI = (green – NIR)/(green + NIR). Higher Planet scene numbers are layered over lower scene numbers. Normalized Difference Water Index (MNDWI) 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.Suggested Use:NDVI: NDVI is commonly used to distinguish healthy/active vegetation (1) from unhealthy/dormant vegetation (-1).NDWI: Thresholding of NDVI is one technique used to distinguish surfaces covered by water (-1) from surfaces not covered by water (1).Satellite/Sensor:PlanetScope. This product includes copyrighted material of Planet Labs PBC. All rights reserved.Resolution:3 metersCredits:NASA Disasters Program, NASA Marshall Space Flight Center (MSFC)PlanetScope: Includes copyrighted material of Planet Labs PBC. All rights reserved.Service URL:WMS Endpoint:</div></div> NASA Disasters Program, Dartmouth Flood Observatory at the University of Colorado, NASA MSFC, NASA GSFC. NASA-GSFC, Frederick Policelli. PlanetScope: Includes copyrighted material of Planet Labs PBC. All rights reserved. PLANET_NDVI_MDWI NASA NASA Disasters Program Tornado Tornadoes Arkansas Tennessee Alabama Louisiana Severe Weather Planet NDVI NDWI Flooding Floods Flood <div style='text-align:Left;'><div>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: "Includes copyrighted material of Planet Labs PBC. All rights reserved.</div></div> 20250925