These polygon data depict the potential sea level rise inundation of coastal areas resulting from a projected 1 to 10 feet rise in sea level above current Mean Higher High Water (MHHW) conditions. Although the water surface mapped represents a particular increase in sea level in feet above MHHW, the actual cell values in NOAA's original raster data represent depth in meters.
These data, covering the full coastal area of Massachusetts, were created as part of the National Oceanic and Atmospheric Administration Office for Coastal Management's efforts to create an online mapping viewer depicting potential sea level rise (SLR) and its associated impacts on the nation's coastal areas.
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