Cloud Mask
type: Dataset
keyword: Black Marble
keyword: Brazil
keyword: NASA Disasters
keyword: Black Marble HD
keyword: Landslides
keyword: Porto Alegre
keyword: NASA
keyword: Brasil
keyword: Flood
landing page: https://disasters.amerigeoss.org/maps/NASA::cloud-mask
description: Date of Image: Pre-Event: March 2024 Post-Event: 5/7/2024, 5/8/2024, 5/9/2024 Date of Next Image: Unknown Summary: These Black Marble High-Definition (BMHD) images were created by the NASA Black Marble Science team, with directed funding the NASA-Google Partnership program. The images map the impact of the major flooding in Rio Grande do Sul on electric grids in Porto Alegre. The baseline image (before the floods) was from May 2024, a cloud-free, moon-free composite, and the “after" image was from May 7, 2024. There is a layer to display where clouds are present in the "after" images. This comparison between the two images is meant as a visual assessment of outage impacts from the flooding to aid various partners who are working to deliver emergency aids to local communities. Power outage maps like these help disaster response efforts in the short-term as well as long-term monitoring during the crucial stages of disaster recovery. Suggested Use: NOTE: Black Marble HD images are downscaled from NASA’s Black Marble nighttime lights product (VNP46), and as such are a “modelled” or “best guess” estimate of how lights are distributed at a 30m resolution. These images should be used for visualization purposes, not for quantitative analysis. The image is in inferno color scale. Yellow represents presence of more light; dark blue less lights. Satellite/Sensor: The primary data source, NASA’s Black Marble nighttime lights product suite (VNP46), utilized to generate this product is derived from the Visible Infrared Imaging Radiometer Suite (VIIRS) Day/Night Band (DNB) onboard the Suomi National Polar-orbiting Platform (SNPP) along with high resolution base layers - Landsat derived normalized index products (NDVI and NDWI) and OpenStreetMap (OSM) derived road layer Resolution: Scaled resolution of 30 meters Credits: NASA Black Marble Science team Please cite the following two references when using this data: Román MO, Stokes EC, Shrestha R, Wang Z, Schultz L, Carlo EA, Sun Q, …
issued: 2024-05-08T20:29:14+00:00
modified: 2024-05-10T20:18:04+00:00
publisher: NASA ArcGIS Online

Shapefile
type: Distribution
access URL: https://disasters.amerigeoss.org/api/download/v1/items/85821a7fe3d040ebb799f7b936f5229c/shapefile
format: ZIP
issued: 2025-09-18T18:10:16.421506
modified: 2025-09-18T18:10:16.410405

GeoJSON
type: Distribution
access URL: https://disasters.amerigeoss.org/api/download/v1/items/85821a7fe3d040ebb799f7b936f5229c/geojson
format: GeoJSON
issued: 2025-09-18T18:10:16.421508
modified: 2025-09-18T18:10:16.410484

CSV
type: Distribution
access URL: https://disasters.amerigeoss.org/api/download/v1/items/85821a7fe3d040ebb799f7b936f5229c/csv
format: CSV
issued: 2025-09-18T18:10:16.421503
modified: 2025-09-18T18:10:16.410327

OGC WMS
type: Distribution
access URL: https://maps.disasters.nasa.gov/ags03/services/brasil_flood_202405/blackmarble_hd/MapServer/WMSServer
format: OGC WMS
issued: 2025-09-18T18:10:16.421501
modified: 2025-09-18T18:10:16.410246

KML
type: Distribution
access URL: https://disasters.amerigeoss.org/api/download/v1/items/85821a7fe3d040ebb799f7b936f5229c/kml
format: KML
issued: 2025-09-18T18:10:16.421511
modified: 2025-09-18T18:10:16.410561

ArcGIS Hub Dataset
type: Distribution
access URL: https://disasters.amerigeoss.org/maps/NASA::cloud-mask
format: HTML
issued: 2025-09-18T18:10:16.421493
modified: 2025-09-18T18:10:16.410047

ArcGIS GeoService
type: Distribution
access URL: https://maps.disasters.nasa.gov/ags03/rest/services/brasil_flood_202405/blackmarble_hd/MapServer/11
format: ArcGIS GeoServices REST API
issued: 2025-09-18T18:10:16.421498
modified: 2025-09-18T18:10:16.410162