DISASTERS_202604_TYPHON_SINLAKU/202606_bm

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Service Description: <div style='text-align:Left;'><div><div>This dataset is experimental and should only be used for situational awareness and data corroboration.Derived luminosity loss maps are processed data based off Black Marble BRDF nighttime light observations. This data may be used as a proxy for power loss. The original BRDF data is available at:https://gis.earthdata.nasa.gov/portal/home/item.html?id=62cf0b48eeb744e0a9ced76f6326a03cDates of Image:Post-Event: April 18, 2026; April 19, 2026Pre-Event: March 2026Methodology:Only a subset of the raw black marble data was used. Note that while the Disasters team has clipped data to remove false positives, some observations may be obscured by total or partial cloud cover. Other factors such as snow reflectance, moon phase, wildfires, and wildfire smoke may distort light radiance and require further analysis when assessing power outages.Certain areas were filtered out into an “Analyzed areas” map, which shows subsets of counties that were retained after certain data extents were removed:Baseline (March 2026) data with low radiance (<1) is removed from the county geometry as it is background.Cloud cover from the date of interest (in this example, September 29th) is removed from the county geometry.Counties are only included within the bounding box of the Black Marble data that was provided.Once the extent was finalized, the Black Marble Data was modified:Negative out-of-range values were changed to 0.The revised black marble pixels were extracted to the analyzed area geometry:The difference between pre and post-event total light intensity in each county was calculated to measure percent light intensity loss. This is indicated in popups as Light Intensity Loss (percentage).The percentage of analyzed area (with area omitted due to being background in the baseline or cloud-covered in the day of Black Marble) is also available in the attribute table. Lower values may reflect lower confidence in the percent Luminosity Loss depending on where the cloud cover is, especially in circumstances where the primary light source in a given geometry is obfuscated.Suggested Use:NASA's Black Marble Nighttime Light product suite is a state-of-the-art daily global collection of standard products for monitoring nighttime lights (NTL). Utilizing the Visible Imaging Radiometer Suite (VIIRS) Day/Night Band (DNB) aboard the Suomi-NPP, NOAA-20, and NOAA-21 satellites.Grey represents cloud cover. Note that these maps are experimental and subject to change and development and should be used only for situational awareness.Satellite/Sensor:Visible Infrared Imaging Radiometer Suite (VIIRS) Day/Night Band (DNB) onboard the Suomi National Polar-orbiting Platform (SNPP), NOAA-20, and NOAA-21SNPP: August 2024 composite, September 22-24, 2024, October 1, 2024NOAA-20: September 25 - September 31, 2024, October 2, 2024 - October 4, 2024Resolution:500 metersCredits:NASA Black Marble Science teamDisasters Response Coordination SystemPlease cite the following two references when using this data:Román MO, Stokes EC, Shrestha R, Wang Z, Schultz L, Carlo EA, Sun Q, Bell J, Molthan A, Kalb V, Ji C. Satellite-based assessment of electricity restoration efforts in Puerto Rico after Hurricane Maria. PloS one. 2019 Jun 28;14(6):e0218883.Román MO, Wang Z, Sun Q, Kalb V, Miller SD, Molthan A, Schultz L, Bell J, Stokes EC, Pandey B, Seto KC. NASA's Black Marble nighttime lights product suite. Remote Sensing of Environment. 2018 Jun 1;210:113-43.Point of Contact:Ranjay ShresthaNASA Goddard Space Flight CenterE-mail: ranjay.m.shrestha@nasa.govAdditional Links:NASA’s Black Marble Product SuiteRomán, M.O. et al. (2019) Satellite-based assessment of electricity restoration efforts in Puerto Rico after Hurricane Maria. PLoS One, 14 (6).Román, M.O. et al. (2018) NASA’s Black Marble nighttime lights product suite. Remote Sensing of Environment. 210, 113–143.Esri REST Endpoint:See Layers below.WMS Endpoint:https://gis.earthdata.nasa.gov/gis05/services/DISASTERS_202606_TYPHON_SINLAKU/BM_PowerLossProxy/MapServer/WMSServer</div></div></div>

Map Name: brdf

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All Layers and Tables

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Dynamic All Layers

Layers:

April 25, 2026 (0)
- Structures Database (1)
  - Northern Mariana Islands (2)
  - Guam (3)
- Luminosity Loss (4)
- Unanalyzed Area (Baseline luminosity insufficient; cloud cover) (5)
April 24, 2026 (6)
- Structures Database (7)
  - Northern Mariana Islands (8)
  - Guam (9)
- Luminosity Loss (10)
- Unanalyzed Area (Baseline luminosity insufficient; cloud cover) (11)
April 23, 2026 (12)
- Structures Database (13)
  - Guam (14)
  - Northern Mariana Islands (15)
- Luminosity Loss (16)
- Unanalyzed Area (Baseline luminosity insufficient; cloud cover) (17)
April 22, 2026 (18)
- Structures Database (19)
  - Northern Mariana Islands (20)
  - Guam (21)
- Luminosity Loss (22)
- Unanalyzed Area (Baseline luminosity insufficient; cloud cover) (23)
April 21, 2026 (24)
- Structures Database (25)
  - Guam (26)
  - Northern Mariana Islands (27)
- Luminosity Loss (28)
- Unanalyzed Area (Baseline luminosity insufficient; cloud cover) (29)
April 20, 2026 (30)
- Structures Database (31)
  - Guam (32)
  - Northern Mariana Islands (33)
- Luminosity Loss (34)
- Unanalyzed Area (Baseline luminosity insufficient; cloud cover) (35)

Description: This dataset is experimental and should only be used for situational awareness and data corroboration.Derived luminosity loss maps are processed data based off Black Marble BRDF nighttime light observations. This data may be used as a proxy for power loss. The original BRDF data is available at:https://gis.earthdata.nasa.gov/portal/home/item.html?id=62cf0b48eeb744e0a9ced76f6326a03cDates of Image:Post-Event: April 18, 2026; April 19, 2026Pre-Event: March 2026Methodology:Only a subset of the raw black marble data was used. Note that while the Disasters team has clipped data to remove false positives, some observations may be obscured by total or partial cloud cover. Other factors such as snow reflectance, moon phase, wildfires, and wildfire smoke may distort light radiance and require further analysis when assessing power outages.Certain areas were filtered out into an “Analyzed areas” map, which shows subsets of counties that were retained after certain data extents were removed:Baseline (March 2026) data with low radiance (<1) is removed from the county geometry as it is background.Cloud cover from the date of interest (in this example, September 29th) is removed from the county geometry.Counties are only included within the bounding box of the Black Marble data that was provided.Once the extent was finalized, the Black Marble Data was modified:Negative out-of-range values were changed to 0.The revised black marble pixels were extracted to the analyzed area geometry:The difference between pre and post-event total light intensity in each county was calculated to measure percent light intensity loss. This is indicated in popups as Light Intensity Loss (percentage).The percentage of analyzed area (with area omitted due to being background in the baseline or cloud-covered in the day of Black Marble) is also available in the attribute table. Lower values may reflect lower confidence in the percent Luminosity Loss depending on where the cloud cover is, especially in circumstances where the primary light source in a given geometry is obfuscated.Suggested Use:NASA's Black Marble Nighttime Light product suite is a state-of-the-art daily global collection of standard products for monitoring nighttime lights (NTL). Utilizing the Visible Imaging Radiometer Suite (VIIRS) Day/Night Band (DNB) aboard the Suomi-NPP, NOAA-20, and NOAA-21 satellites.Grey represents cloud cover. Note that these maps are experimental and subject to change and development and should be used only for situational awareness.Satellite/Sensor:Visible Infrared Imaging Radiometer Suite (VIIRS) Day/Night Band (DNB) onboard the Suomi National Polar-orbiting Platform (SNPP), NOAA-20, and NOAA-21SNPP: August 2024 composite, September 22-24, 2024, October 1, 2024NOAA-20: September 25 - September 31, 2024, October 2, 2024 - October 4, 2024Resolution:500 metersCredits:NASA Black Marble Science teamDisasters Response Coordination SystemPlease cite the following two references when using this data:Román MO, Stokes EC, Shrestha R, Wang Z, Schultz L, Carlo EA, Sun Q, Bell J, Molthan A, Kalb V, Ji C. Satellite-based assessment of electricity restoration efforts in Puerto Rico after Hurricane Maria. PloS one. 2019 Jun 28;14(6):e0218883.Román MO, Wang Z, Sun Q, Kalb V, Miller SD, Molthan A, Schultz L, Bell J, Stokes EC, Pandey B, Seto KC. NASA's Black Marble nighttime lights product suite. Remote Sensing of Environment. 2018 Jun 1;210:113-43.Point of Contact:Ranjay ShresthaNASA Goddard Space Flight CenterE-mail: ranjay.m.shrestha@nasa.govAdditional Links:NASA’s Black Marble Product SuiteRomán, M.O. et al. (2019) Satellite-based assessment of electricity restoration efforts in Puerto Rico after Hurricane Maria. PLoS One, 14 (6).Román, M.O. et al. (2018) NASA’s Black Marble nighttime lights product suite. Remote Sensing of Environment. 210, 113–143.Esri REST Endpoint:See Layers below.WMS Endpoint:https://gis.earthdata.nasa.gov/gis05/services/DISASTERS_202606_TYPHON_SINLAKU/BM_PowerLossProxy/MapServer/WMSServer

Service Item Id: 727a12e7dd22490ba7f7dc571c701d39

Copyright Text: USRA/NASA Black Marble Science team; processing performed by NASA DRCS

Spatial Reference: 102100 (3857) LatestVCSWkid(0)

Single Fused Map Cache: false

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Units: esriMeters

Supported Image Format Types: PNG32,PNG24,PNG,JPG,DIB,TIFF,EMF,PS,PDF,GIF,SVG,SVGZ,BMP

Document Info:

Supports Dynamic Layers: true

MaxRecordCount: 2000

MaxSelectionCount: 2000

MaxImageHeight: 4096

MaxImageWidth: 4096

Supported Query Formats: JSON, geoJSON, PBF

Supports Query Data Elements: true

Min Scale: 0

Max Scale: 0

Supports Datum Transformation: true

Child Resources: Info Dynamic Layer

Supported Operations: Export Map Identify QueryLegends QueryDomains Find Return Updates

DISASTERS_202604_TYPHON_SINLAKU/202606_bm_powerlossproxy (MapServer)