| snippet:
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Southwest Kansas Burned Area Polygon as of 5/16/26 at 12:19 local time. derived from Sentinel-2 NBR. |
| summary:
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Southwest Kansas Burned Area Polygon as of 5/16/26 at 12:19 local time. derived from Sentinel-2 NBR. |
| extent:
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[[-103.017411331179,36.707438594708],[-101.469476504149,38.3045102668086]] |
| accessInformation:
|
USGS, Landsat, Clayton Elder (ARC) |
| thumbnail:
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thumbnail/thumbnail.png |
| maxScale:
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1.7976931348623157E308 |
| typeKeywords:
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["ArcGIS","ArcGIS Server","Data","Map Service","Service"] |
| description:
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<div style='text-align:Left;'><p><span style='font-weight:bold;'>Date of Image:</span></p><p><span>May 19, 2026</span></p><p><span style='font-weight:bold;'>Date of Next Image:</span></p><p><span>None Expected</span></p><p><span style='font-weight:bold;'>Summary:</span></p><p><span>The polygon was derived from a combination of a normalized burn ratio (NBR) thresholding derived via Sentinel-2 near-infrared (NIR) and shortwave-infrared bands and a simple single-band NIR threshold from the same image. The NBR threshold for the binary burned classification was set to values <= -0.0999. Any NBR values that exceeded this threshold were classified as unburned and excluded from the polygon. This is a conservative threshold for classifying burned area and likely omits areas of lower intensity burning. Additionally, classified burned areas smaller than 50 contiguous Sentinel-2 pixels (~2 hectare) were removed from the polygon generation. To increase accuracy of the mapped perimeter, the NBR-based polygon was merged with a binary (burned/unburned) mask generated from a simple NIR threshold applied to band-8 of the Sentinel-2 image, where the chosen threshold value was 0.3. The result of the merge resulted in a more accurate mapping of burn areas, including lower-intensity burned areas. As a result of the NIR thresholding, open small water bodies were included in the mask (low NIR signal mimicking burn scars). To mitigate this effect, NIR-threshold areas <5 hectare were removed from the resulting burn perimeter map. It is possible that this step also removed small isolated burn patches. Lastly, since the NIR thresholding is also sensitive to older burn areas, the resulting map may include burn scars that pre-date the 5/19 event by days to months. </span></p><p><span style='font-weight:bold;'>Credits:</span></p><p><span>USGS, Landsat, Clayton Elder (ARC)</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 Endpoint:</span></p><p><span /></p><p><span /></p><p><span /></p></div> |
| licenseInfo:
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<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.</span></p></div></div> |
| catalogPath:
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|
| title:
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202608_landsat_nbrburnperimeter |
| type:
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Map Service |
| url:
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|
| tags:
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[] |
| culture:
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en-US |
| portalUrl:
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|
| name:
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202608_landsat_nbrburnperimeter |
| guid:
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9E65E36C-C5E4-43E4-8508-76AEE10DAA43 |
| minScale:
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0 |
| spatialReference:
|
WGS_1984_UTM_Zone_13N |