| snippet:
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OPERA Surface Disturbance Map from Harmonized Landsat Sentinel-2 for Hurricane Helene |
| summary:
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OPERA Surface Disturbance Map from Harmonized Landsat Sentinel-2 for Hurricane Helene |
| extent:
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[[-83.2483799039449,35.1350019519995],[-80.8902406792216,37.04658304885]] |
| accessInformation:
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NASA JPL-Caltech ARIA/OPERA Team |
| 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;"><DIV><DIV><P><SPAN STYLE="font-weight:bold;">Date of Images:</SPAN></P><P><SPAN>10/2/2024 at 16:11 UTC (12:11 PM EDT)</SPAN></P><P><SPAN STYLE="font-weight:bold;">Summary:</SPAN></P><P><SPAN>The Advanced Rapid Imaging and Analysis (ARIA) and Observational Products for End-Users from Remote Sensing Analysis (OPERA) teams at NASA's Jet Propulsion Laboratory and California Institute of Technology derived the disturbance maps using the OPERA Disturbance Alert from Harmonized Landsat Sentinel-2 (DIST-ALERT-HLS) products. </SPAN></P><P><SPAN>The results posted here are preliminary and unvalidated results, primarily intended to aid the field response and people who want to have a rough first look at the surface disturbance extent. The ARIA-share website has always focused on posting preliminary results as fast as possible for disaster response.</SPAN></P><P><SPAN STYLE="font-style:italic;">OPERA DIST-ALERT-HLS</SPAN></P><P><SPAN>The Disturbance product (DIST) maps per pixel vegetation disturbance (specifically, vegetation cover loss) from the Harmonized Landsat Sentinel-2 (HLS) scenes. We provide the vegetation disturbance status (VEG-DIST-STATUS) and the maximum vegetation anomaly value (VEG-ANOM-MAX) layers. Images are provided from October 2, 2024. Each image consists of multiple MGRS tiles that were merged together for a composite image saved as a GeoTIFF file.</SPAN></P><P><SPAN>VEG-</SPAN><SPAN STYLE="font-style:italic;">DIST</SPAN><SPAN>-STATUS</SPAN></P><P><SPAN>Indication of vegetation cover loss (vegetation disturbance). The status label is based on the maximum anomaly value, confidence level, and whether it is ongoing or finished. "First" means the pixel has had an anomaly detection but no subsequent observations whether anomalous or not. "Provisional" means there have been two consecutive disturbance detections but not yet high confidence. "Confirmed" means that vegetation disturbance is detected with high confidence. The label "finished" is applied to confirmed disturbances that have had two consecutive no-anomaly observations or one 15 days or more after the last anomaly detection. If a new disturbance is detected, it will overwrite those in a "finished" state. These labels are reported for both above and below the 50% disturbance threshold based on the maximum anomaly value.</SPAN></P><P><SPAN STYLE="font-style:italic;">VEG-ANOM-MAX</SPAN></P><P><SPAN>Difference between historical and current year observed vegetation cover at the date of maximum decrease (vegetation loss of 0-100%). This layer can be used to threshold vegetation disturbance per a given sensitivity (e.g. disturbance of >20% vegetation cover loss). The sum of the historical percent vegetation and the anomaly value will be the vegetation cover estimate for the current year.</SPAN></P><P><SPAN>The DSWx-S1 products have these flags:</SPAN></P><P><SPAN>250 (light gray) and 251 (dark gray) represent HAND and layover/shadow masks, respectively.</SPAN></P><P><SPAN STYLE="font-weight:bold;">Suggested Use:</SPAN></P><P><SPAN STYLE="font-style:italic;">VEG-ANOM-MAX</SPAN></P><UL><LI><P><SPAN>0-100: Maximum loss of percent vegetation </SPAN></P></LI><LI><P><SPAN>255: No data </SPAN></P></LI></UL><P><SPAN STYLE="font-style:italic;">VEG-DIST-STATUS:</SPAN></P><UL><LI><P><SPAN>0: No disturbance </SPAN></P></LI><LI><P><SPAN>1: first <50% </SPAN></P></LI><LI><P><SPAN>2: provisional <50% </SPAN></P></LI><LI><P><SPAN>3: confirmed <50% </SPAN></P></LI><LI><P><SPAN>4: first >50% </SPAN></P></LI><LI><P><SPAN>5: provisional >50% </SPAN></P></LI><LI><P><SPAN>6: confirmed >50% </SPAN></P></LI><LI><P><SPAN>7: confirmed <50%, finished </SPAN></P></LI><LI><P><SPAN>8: confirmed >50%, finished </SPAN></P></LI><LI><P><SPAN>255: No data </SPAN></P></LI></UL><P><SPAN STYLE="font-weight:bold;">Satellite/Sensor:</SPAN></P><P><SPAN>MultiSpectral Instrument (MSI) on European Space Agency's (ESA) Copernicus Sentinel-2A satellites</SPAN></P><P><SPAN STYLE="font-weight:bold;">Resolution:</SPAN></P><P><SPAN>30 meters</SPAN></P><P><SPAN STYLE="font-weight:bold;">Credits:</SPAN></P><P><SPAN>NASA JPL-Caltech ARIA/OPERA Team</SPAN></P><P><SPAN>The product contains modified Copernicus Sentinel data (2024) and is produced as part of the OPERA project, which is funded by NASA to address remote sensing needs identified by the Satellite Needs Working Group. Managed by NASA's Jet Propulsion Laboratory, OPERA funds and manages the DIST-ALERT-HLS product developed and produced by the Global Land Analysis and Discovery (GLAD) laboratory at the University of Maryland.</SPAN></P><P><SPAN>Additional Information:</SPAN></P><P><SPAN STYLE="font-style:italic;">OPERA DSWx-S1 data availability</SPAN></P><P><SPAN>The post-processed products are available to download at </SPAN><A href="https://aria-share.jpl.nasa.gov/20240926-Hurricane_Helene/DIST" STYLE="text-decoration:underline;"><SPAN>https://aria-share.jpl.nasa.gov/20240926-Hurricane_Helene/DIST</SPAN></A><SPAN>. </SPAN></P><P><SPAN>The OPERA DIST-HLS products have been in production since January 2022, are freely distributed to the public via NASA's Land Processes Distributed Active Archive Center (LP DAAC), and can be downloaded through NASA's Earthdata search. For more information about the Surface Disturbance product suite, please refer to the DIST Product page: </SPAN><A href="https://www.jpl.nasa.gov/go/opera/products/dist-product-suite/" STYLE="text-decoration:underline;"><SPAN>https://www.jpl.nasa.gov/go/opera/products/dist-product-suite/</SPAN></A></P><P><SPAN>For more information about the Caltech-JPL ARIA project, visit </SPAN><A href="https://aria.jpl.nasa.gov/" STYLE="text-decoration:underline;"><SPAN>https://aria.jpl.nasa.gov </SPAN></A></P><P><SPAN>For more information about the JPL OPERA project, visit </SPAN><A href="https://www.jpl.nasa.gov/go/opera/" STYLE="text-decoration:underline;"><SPAN>https://www.jpl.nasa.gov/go/opera/ </SPAN></A></P><P><SPAN STYLE="font-weight:bold;">Data Download:</SPAN></P><P><SPAN /><A href="https://aria-share.jpl.nasa.gov/20240926-Hurricane_Helene/DIST" STYLE="text-decoration:underline;"><SPAN>https://aria-share.jpl.nasa.gov/20240926-Hurricane_Helene/DIST</SPAN></A><SPAN>. </SPAN></P><P><SPAN STYLE="font-weight:bold;">Esri REST Endpoint:</SPAN></P><P><SPAN>See URL section on right side of page</SPAN></P><P><SPAN STYLE="font-weight:bold;">WMS Endpoint:</SPAN></P><P><SPAN /></P></DIV></DIV></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. Please cite the information according to the direction provided in the metadata.</SPAN></P></DIV></DIV> |
| catalogPath:
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| title:
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aria_dist |
| type:
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Map Service |
| url:
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| tags:
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["NASA","NASA Disasters Program","Hurricane Helene","North Carolina","Tennessee","Virginia","ARIA","OPERA","HLS"] |
| culture:
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en-US |
| name:
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aria_dist |
| guid:
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0A30AE3C-771C-42E2-9288-9801C0D0E730 |
| minScale:
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0 |
| spatialReference:
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WGS_1984_UTM_Zone_17N |