Collection 2 Dynamic Surface Water Extent (DSWE) Proportions: CONUS Annual Proportions 1984-Present

Dynamic Surface Water Extent (DSWE) Annual Proportions data summarize occurrence of water on the land surface. DSWE Annual Proportions data are statistical summaries of the USGS Landsat Collection 2 Level-3 DSWE data product (C2-DSWE), a raster dataset of per-pixel surface water inundation status based on the analysis of Landsat 4-9 satellite imagery. DSWE Annual Proportions data average occurrence of surface water extent over yearly time periods across the conterminous US in the form of GeoTIFF rasters with 30m spatial resolution. DSWE Annual Proportions raster pixel values represent the portion of cloud, cloud shadow, and snow free Landsat observations that are classified as surface water inundation in C2-DSWE Interpreted with all Mask ('INWAM') layer. Each DSWE Annual Proportions GeoTIFF contains 5 raster bands: 3 corresponding to DSWE surface water classes (i.e., open, partial, and non-water); 1 representing total surface water (partial and open values combined); and 1 providing a per pixel count of valid DSWE input values. DSWE Annual Proportions data are processed and archived to the continental US Analysis Ready Data (ARD) tile scheme: https://landsat.usgs.gov/ard_tile.