Description

These data were created as part of the National Oceanic and Atmospheric Administration Office for Coastal Management's efforts to create an online mapping viewer called the Sea Level Rise and Coastal Flooding Impacts Viewer. It depicts potential sea level rise and its associated impacts on the nation's coastal areas. The purpose of the mapping viewer is to provide coastal managers and scientists with a preliminary look at sea level rise (slr) and coastal flooding impacts. The viewer is a screening-level tool that uses nationally consistent data sets and analyses. Data and maps provided can be used at several scales to help gauge trends and prioritize actions for different scenarios. The Sea Level Rise and Coastal Flooding Impacts Viewer may be accessed at: http://www.coast.noaa.gov/slr This metadata record describes the digital elevation model (DEM) for the coastline of Connecticut, which is a part of a series of DEMs produced for the National Oceanic and Atmospheric Administration Office for Coastal Management's Sea Level Rise and Coastal Flooding Impacts Viewer, described above. This DEM includes the best available lidar known to exist at the time of DEM creation that met project specifications, for the shoreline of Connecticut, which includes the coastal areas of the counties of Fairfield, New Haven, Middlesex, and New London Counties. The DEM was produced from the following lidar datasets: 1. 2011 USGS Lidar for the Northeast 2. 2012 USACE Post Sandy Lidar 3. 2011 Quinnipiac River Lidar 4. 2010 USDA-NRCS/USACE Topographic Lidar: Eastern Connecticut 5. 2006 FEMA Coastal Connecticut Lidar 6. 2004 Connecticut River Lidar 7. UCONN Center for Land Use Education Research (CLEAR) 10ft DEMs Hydrographic breaklines were delineated from LiDAR intensity imagery generated from the LiDAR datasets. The final DEM is hydro flattened such that water elevations are less than or equal to -0.5 meters. The DEM is referenced vertically to the North American Vertical Datum of 1988 (NAVD88) with vertical units of meters and horizontally to the North American Datum of 1983 (NAD83). The resolution of the DEM is approximately 10 meters.

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• This data is described at

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