DISASTERS_EX2602_202405_FLOOD_BRAZIL/EX2602_opera_dist

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Service Description: <div style='text-align:Left;'>Dates of Images:20240506T1329, 20240515T1323 (GMT) (YYYYMMDDTHHMM)Summary:The Advanced Rapid Imaging and Analysis (ARIA) and Observational Products for End-Users from Remote Sensing Analysis (OPERA) teams at the Jet Propulsion Laboratory, California Institute of Technology produced maximum vegetation anomaly loss mapping products for hillslopes, with the intent to facilitate detection of landslides, using the OPERA Surface Disturbance Alert from Harmonized Landsat Sentinel-2 (DIST-ALERT-HLS) dataset. These products provide a rapid assessment of surface water extent to support emergency response and situational awareness during flood events.The dataset provided includes two product types:<ol><li>Vegetation Disturbance Status maps on individual dates</li><li>Maximum Vegetation Anomaly loss maps on individual dates</li></ol>Dates and Input Data:<ul><li>Images: May 6, 2024 and May 15, 2024</li><li>Products are generated from OPERA DIST-ALERT-HLS satellite imagery and mosaicked across tiles to provide continuous coverage.</li></ul>Product Description:Surface Disturbance, specifically vegetation loss, is identified from optical satellite imagery and mapped at 30 m spatial resolution. The Vegetation Disturbance Status layer indicates the confidence that vegetation loss has occurred, and whether the disturbance is still ongoing or has ended. The Max Vegetation Anomaly loss shows how much vegetation has been lost at each location, based on the largest change observed during the time period. As the number of post-event images increase, the confidence in the detections increases. Note we applied a temporal filter and a slope mask to these products. The temporal filter was used to remove any surface disturbance that occurred prior to the onset of the flooding/rain. The slope mask was used to remove slopes < 8 degrees (based on the Copernicus GLO30 DEM) in order to help detect landslides. Caveats and Limitations:This product detects vegetation loss, not landslides directly. A slope threshold filter of >8 degrees was applied to exclude gentle terrain where landslides are less likely to occur. Importantly, not all detected changes are landslides—vegetation loss can also result from other causes.These results are intended to support rapid emergency response. All information is provisional for use under emergency response guidelines. These data are provided with absolutely no warranty of any kind. Use at your own risk.Suggested Use:The OPERA DIST-ALERT-HLS maps per pixel vegetation disturbance (specifically, vegetation cover loss) from the Harmonized Landsat Sentinel-2 (HLS) scenes. We provide the (1) maximum vegetation anomaly value (VEG-ANOM-MAX) layer and (2) vegetation disturbance status (VEG-DIST-STATUS). All provided layers have been filtered to include only disturbance detected following the start of flooding/rain. VEG-ANOM-MAX: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. VEG-ANOM-MAX Layer Values:File names: ARIA-OPERA_L3_DIST-ALERT-HLS_V1_VEG-ANOM-MAX_20240515T1323_mosaic_SlopeMask_TimeFilt.tif, ARIA-OPERA_L3_DIST-ALERT-HLS_V1_VEG-ANOM-MAX_20240506T1329_mosaic_SlopeMask_TimeFilt.tif<ul><li>0-100: Maximum loss of percent vegetation (suggested color: white to red gradient)</li><li>255: No data (suggested color: transparent)</li></ul>VEG-DIST-STATUS: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 with 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.VEG-DIST-STATUS Layer Values:File names: ARIA-OPERA_L3_DIST-ALERT-HLS_V1_VEG-DIST-STATUS_20240506T1329_mosaic_SlopeMask_TimeFilt.tif, ARIA-OPERA_L3_DIST-ALERT-HLS_V1_VEG-DIST-STATUS_20240515T1323_mosaic_SlopeMask_TimeFilt.tif<ul><li>0: No disturbance (suggested color: #121212)</li><li>1: first <50% (suggested color: #005555)</li><li>2: provisional <50% (suggested color: #897f4e)</li><li>3: confirmed <50% (suggested color: #dee043)</li><li>4: first >=50% (suggested color: #008888)</li><li>5: provisional >=50% (suggested color: #e48727)</li><li>6: confirmed >=50% (suggested color: #e01b07)</li><li>7: confirmed <50%, finished (suggested color: #777777)</li><li>8: confirmed >=50%, finished (suggested color: #dddddd)</li><li>255: No data (suggested color: transparent)</li></ul>Satellite/Sensor/Resolution:Satellite/Sensor: Harmonized Landsat Sentinel-2 (HLS) derived from MultiSpectral Instrument (MSI) on European Space Agency's (ESA) Copernicus Sentinel-2A/2B/2C satellites and Operational Land Imager 2 (OLI-2) on NASA/USGS Landsat 8/9 satellites.Spatial Resolution: 30 metersTemporal Resolution: Sub-weeklyCredits:The product contains modified Copernicus Sentinel data, processed by the European Space Agency and analyzed by the NASA-JPL/Caltech ARIA/OPERA team. The DIST products are produced as part of the OPERA project, which is funded by NASA to address remote sensing needs identified by the Satellite Needs Working Group, and managed by NASA's Jet Propulsion Laboratory. The DIST-ALERT-HLS product was developed and produced by the OPERA Global Land Analysis and Discovery (GLAD) laboratory at the University of Maryland.NASA JPL-Caltech-UMD ARIA/OPERA TeamProduct POCs:Cole Speed (<a href='mailto:cole.speed@jpl.nasa.gov' style='text-decoration:underline;'>cole.speed@jpl.nasa.gov</a>)Mary Grace Bato (<a href='mailto:bato@jpl.nasa.gov' style='text-decoration:underline;'>bato@jpl.nasa.gov</a>)Emre Havazli (<a href='mailto:emre.havazli@jpl.nasa.gov' style='text-decoration:underline;'>emre.havazli@jpl.nasa.gov</a>) Renato Frasson (<a href='mailto:renato.prata.de.moraes.frasson@jpl.nasa.gov' style='text-decoration:underline;'>renato.prata.de.moraes.frasson@jpl.nasa.gov</a>) Alexander Handwerger (<a href='mailto:alexander.handwerger@jpl.nasa.gov' style='text-decoration:underline;'>alexander.handwerger@jpl.nasa.gov</a> )Esri REST Endpoint:See URL to the bottom right.WMS Endpoint:<a href='https://gis.earthdata.nasa.gov/gis05/services/DISASTERS_EX2602_202405_FLOOD_BRAZIL/EX2602_opera_dist_hls/MapServer/WMSServer' target='_blank'>https://gis.earthdata.nasa.gov/gis05/services/DISASTERS_EX2602_202405_FLOOD_BRAZIL/EX2602_opera_dist_hls/MapServer/WMSServer</a></div>

Map Name: opera_dist_hls

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Description: Dates of Images:20240506T1329, 20240515T1323 (GMT) (YYYYMMDDTHHMM)Summary:The Advanced Rapid Imaging and Analysis (ARIA) and Observational Products for End-Users from Remote Sensing Analysis (OPERA) teams at the Jet Propulsion Laboratory, California Institute of Technology produced maximum vegetation anomaly loss mapping products for hillslopes, with the intent to facilitate detection of landslides, using the OPERA Surface Disturbance Alert from Harmonized Landsat Sentinel-2 (DIST-ALERT-HLS) dataset. These products provide a rapid assessment of surface water extent to support emergency response and situational awareness during flood events.The dataset provided includes two product types:Vegetation Disturbance Status maps on individual datesMaximum Vegetation Anomaly loss maps on individual datesDates and Input Data:Images: May 6, 2024 and May 15, 2024Products are generated from OPERA DIST-ALERT-HLS satellite imagery and mosaicked across tiles to provide continuous coverage.Product Description:Surface Disturbance, specifically vegetation loss, is identified from optical satellite imagery and mapped at 30 m spatial resolution. The Vegetation Disturbance Status layer indicates the confidence that vegetation loss has occurred, and whether the disturbance is still ongoing or has ended. The Max Vegetation Anomaly loss shows how much vegetation has been lost at each location, based on the largest change observed during the time period. As the number of post-event images increase, the confidence in the detections increases. Note we applied a temporal filter and a slope mask to these products. The temporal filter was used to remove any surface disturbance that occurred prior to the onset of the flooding/rain. The slope mask was used to remove slopes < 8 degrees (based on the Copernicus GLO30 DEM) in order to help detect landslides. Caveats and Limitations:This product detects vegetation loss, not landslides directly. A slope threshold filter of >8 degrees was applied to exclude gentle terrain where landslides are less likely to occur. Importantly, not all detected changes are landslides—vegetation loss can also result from other causes.These results are intended to support rapid emergency response. All information is provisional for use under emergency response guidelines. These data are provided with absolutely no warranty of any kind. Use at your own risk.Suggested Use:The OPERA DIST-ALERT-HLS maps per pixel vegetation disturbance (specifically, vegetation cover loss) from the Harmonized Landsat Sentinel-2 (HLS) scenes. We provide the (1) maximum vegetation anomaly value (VEG-ANOM-MAX) layer and (2) vegetation disturbance status (VEG-DIST-STATUS). All provided layers have been filtered to include only disturbance detected following the start of flooding/rain. VEG-ANOM-MAX: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. VEG-ANOM-MAX Layer Values:File names: ARIA-OPERA_L3_DIST-ALERT-HLS_V1_VEG-ANOM-MAX_20240515T1323_mosaic_SlopeMask_TimeFilt.tif, ARIA-OPERA_L3_DIST-ALERT-HLS_V1_VEG-ANOM-MAX_20240506T1329_mosaic_SlopeMask_TimeFilt.tif0-100: Maximum loss of percent vegetation (suggested color: white to red gradient)255: No data (suggested color: transparent)VEG-DIST-STATUS: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 with 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.VEG-DIST-STATUS Layer Values:File names: ARIA-OPERA_L3_DIST-ALERT-HLS_V1_VEG-DIST-STATUS_20240506T1329_mosaic_SlopeMask_TimeFilt.tif, ARIA-OPERA_L3_DIST-ALERT-HLS_V1_VEG-DIST-STATUS_20240515T1323_mosaic_SlopeMask_TimeFilt.tif0: No disturbance (suggested color: #121212)1: first <50% (suggested color: #005555)2: provisional <50% (suggested color: #897f4e)3: confirmed <50% (suggested color: #dee043)4: first >=50% (suggested color: #008888)5: provisional >=50% (suggested color: #e48727)6: confirmed >=50% (suggested color: #e01b07)7: confirmed <50%, finished (suggested color: #777777)8: confirmed >=50%, finished (suggested color: #dddddd)255: No data (suggested color: transparent)Satellite/Sensor/Resolution:Satellite/Sensor: Harmonized Landsat Sentinel-2 (HLS) derived from MultiSpectral Instrument (MSI) on European Space Agency's (ESA) Copernicus Sentinel-2A/2B/2C satellites and Operational Land Imager 2 (OLI-2) on NASA/USGS Landsat 8/9 satellites.Spatial Resolution: 30 metersTemporal Resolution: Sub-weeklyCredits:The product contains modified Copernicus Sentinel data, processed by the European Space Agency and analyzed by the NASA-JPL/Caltech ARIA/OPERA team. The DIST products are produced as part of the OPERA project, which is funded by NASA to address remote sensing needs identified by the Satellite Needs Working Group, and managed by NASA's Jet Propulsion Laboratory. The DIST-ALERT-HLS product was developed and produced by the OPERA Global Land Analysis and Discovery (GLAD) laboratory at the University of Maryland.NASA JPL-Caltech-UMD ARIA/OPERA TeamProduct POCs:Cole Speed (cole.speed@jpl.nasa.gov)Mary Grace Bato (bato@jpl.nasa.gov)Emre Havazli (emre.havazli@jpl.nasa.gov) Renato Frasson (renato.prata.de.moraes.frasson@jpl.nasa.gov) Alexander Handwerger (alexander.handwerger@jpl.nasa.gov )Esri REST Endpoint:See URL to the bottom right.WMS Endpoint:https://gis.earthdata.nasa.gov/gis05/services/DISASTERS_EX2602_202405_FLOOD_BRAZIL/EX2602_opera_dist_hls/MapServer/WMSServer

Service Item Id: d228490be7ee432fb77089027007250a

Copyright Text: NASA-JPL/Caltech ARIA/OPERA team, Copernicus Sentinel Data, Landsat, NASA Disasters

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DISASTERS_EX2602_202405_FLOOD_BRAZIL/EX2602_opera_dist_hls (MapServer)