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March 21, 2022

Landsat Collection 2 Level-3 Dynamic Surface Water Extent, Burned Area, Fractional Snow Covered Area, and Fractional Snow Covered Area Statistics products are now available for download from the USGS. These higher-level science products are research-quality and applications ready and reduce the upfront processing time users needed to prepare tiles for use.

Landsat Collection 2 Level-3 Dynamic Surface Water Extent, Burned Area, Fractional Snow Covered Area, and Fractional Snow Covered Area Statistics products are now available for download from the USGS. These higher-level science products are research-quality and applications ready and reduce the upfront processing time users needed to prepare tiles for examination.

These Level-3 science products are generated from Landsat Collection 2 Analysis Ready Data (ARD) inputs.  

NOTE: Landsat 9 Collection 2 Level-3 products will become available later in 2022.  

Landsat Collection 2 DSWE Example
Example of the Landsat Collection 2 Dynamic Surface Water Science Product showing the Confluence of the Wabash and Ohio Rivers on April 12, 2021, for tile h021V010. Left: Landsat Collection 2 U.S. Analysis Ready Data Surface Reflectance image, Right: Dynamic Surface Water Extent (INTR layer)

Dynamic Surface Water Extent (DSWE)

Aquatic researchers require current habitat information, especially surface water extent. A variety of environmental processes impact surface water extent including meteorology, hydrology, and geology processes. DSWE provides raster layers that represent surface water inundation per pixel for Landsat data acquired from 1984–present, for the conterminous (CONUS) United States, Alaska, and Hawaii. Aquatic scientists and water resource managers harness Landsat data to predict and understand impacts by changes in surface water extent.

Burned Area

Precise and polished data on fire occurrences are essential to understanding burned area trends for Landsat data acquired from 1984–present, for CONUS. The Burned Area product enables users to identify burned areas across all ecosystems including forests, shrublands, and grasslands. The product identifies per pixel burn classification and burn probability. Utilizing the Burned Area product, Landsat data users can quantify patterns of fire occurrences and project future fire trends.

Example of the Landsat Collection 2 Burned Area Science Product
Example of the Landsat Collection 2 Burned Area Science Product showing the Bootleg Fire in Oregon on July 11, 2021 for tile h006V010. Left: Landsat Collection 2 U.S. Analysis Ready Data Surface Reflectance image, Middle: Burn Classification (BC), and Right: Burn Probability (BP).

Fractional Snow Covered Area (fSCA)

Landsat’s spatial resolution offers the capability to resolve snow cover patterns across topographically complex mountainous regions. Snow cover is spatially and temporally variable and is often concentrated in remote or inaccessible land regions making spaceborne remote sensing the most feasible approach to measure and monitor snow cover change. Available for the Northern and Western areas of CONUS for Landsat data acquired 1984–present, fSCA products provide per-pixel fractional snow cover maps that indicate the percentage of a pixel covered by snow. 

Example of the Landsat Collection 2 Fractional Snow Covered Snow product
Example of the Landsat Collection 2 Fractional Snow Covered Area (fSCA) Science Product showing an area in the Dixie National Forest in Utah on February 28, 2021 for tile h007V010. Left: Landsat Collection 2 U.S. Analysis Ready Data Surface Reflectance image, Middle: fSCA, and Right: Canopy Adjusted fSCA.

fSCA Statistics

fSCA mean snow cover fraction and clear pixel count statistics provide information for unique time steps for 1984–present. These time steps include 5-year date ranges and the entire ARD stack period. Each fSCA statistic package contains monthly (entire ARD stack only), annual, and mean annual viewable or ground snow cover statistics files for each unique time step, over a single tile location.

 

Landsat Collection 2 Level-3 Dynamic Surface Water Extent, Burned Area, and Fractional Snow Covered Area products can be downloaded from EarthExplorer (EE). On EE’s Data Set tab, the products are located under the Landsat category, and listed in the Landsat Collection 2 Level-3 Science Products subcategory.

More information about Landsat Collection 2 Level-3 Science Products can be found on the following webpages:

Users are encouraged to contact USGS Customer Services with any questions about Landsat Collection 2 Level-3 Science Products.

 

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