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Planet Water Maps (Goddard Space Flight Center/Dartmouth Flood Observatory), NDVI, and NDWI for the US Severe Weather April 2025. |
| summary:
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Planet Water Maps (Goddard Space Flight Center/Dartmouth Flood Observatory), NDVI, and NDWI for the US Severe Weather April 2025. |
| extent:
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[[-93.1335827725252,33.3815059757411],[-84.3644816038249,39.3474619915547]] |
| accessInformation:
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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. |
| thumbnail:
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thumbnail/thumbnail.png |
| maxScale:
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1.7976931348623157E308 |
| typeKeywords:
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["Data","Service","Map Service","ArcGIS Server"] |
| description:
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<div style='text-align:Left;'><p><span style='font-weight:bold;'>Date of Image(s): </span></p><p><span style='font-style:italic;'>Post-Event</span><span>: April 7,2025</span></p><p><span style='font-weight:bold;'>Date of Next Image</span></p><p><span>Unknown</span></p><p><span style='font-weight:bold;'>Summary:</span></p><p>This is an experimental product. Some areas are affected by cloud cover.</p><p><span style='font-style:italic;'>Normalized Differential Vegetation Index (NDVI) </span><span>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.</span></p><p><span style='font-style:italic;'>Normalized Differential Water Index (NDWI) </span><span>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.</span></p><p><span style='font-style:italic;'>Water maps </span><span>use a beta PlanetScope Flood Mapping system created in partnership between NASA GSFC and the Dartmouth Flood Observatory at the University of Colorado. This product distinguishes water covered pixels from non-water covered pixels, using an adaptive NDWI dynamic thresholding approach. Details are in a pending publication.</span></p><p><span>Processed water map raster data include clouds (1), areas not covered by water (2), and water (3).</span></p><p><span style='font-weight:bold;'>Suggested Use:</span></p><p><span style='font-style:italic;'>NDVI: </span><span>NDVI is commonly used to distinguish healthy/active vegetation (1) from unhealthy/dormant vegetation (-1).</span></p><p><span style='font-style:italic;'>NDWI: </span><span>Thresholding of NDVI is one technique used to distinguish surfaces covered by water (-1) from surfaces not covered by water (1).</span></p><p><span style='font-style:italic;'>Water Maps: </span><span>This product shows water that is detected by the sensor with different colors indicating different land cover/land use classifications</span></p><p><span style='font-weight:bold;'>Satellite/Sensor:</span></p><p><span>PlanetScope. This product includes copyrighted material of Planet Labs PBC. All rights reserved.</span></p><p><span style='font-weight:bold;'>Resolution:</span></p><p><span>3 meters</span></p><p><span style='font-weight:bold;'>Credits:</span></p><p><span>NASA Disasters Program, Dartmouth Flood Observatory at the University of Colorado, NASA Marshall Space Flight Center (MSFC), NASA GSFC. </span></p><p><span>NASA-GSFC Principle Investigator (PI): Frederick Policelli</span></p><p><span>PlanetScope: Includes copyrighted material of Planet Labs PBC. All rights reserved.<br /></span></p><p><span></span></p></div> |
| licenseInfo:
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<div style='text-align:Left;'><p>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.</p><p><span>Use of this product should include: "Includes copyrighted material of Planet Labs PBC. All rights reserved.</span></p></div> |
| catalogPath:
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| title:
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Planet Water Maps (GSFC/DFO), NDVI, and NDWI for the US Severe Weather April 2025 |
| type:
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Map Service |
| url:
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|
| tags:
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["NASA","NASA Disasters Program","Tornado","Tornadoes","Arkansas","Tennessee","Alabama","Louisiana","Severe Weather","Planet","NDVI","NDWI","Flooding","Floods","Flood"] |
| culture:
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en-US |
| name:
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planet_gsfcdfo |
| guid:
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D9AEA9C3-FCD9-4B91-8167-E7BFFF501B61 |
| minScale:
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0 |
| spatialReference:
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WGS_1984_Web_Mercator_Auxiliary_Sphere |