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These data were created as part of the National Oceanic and Atmospheric 
Administration Coastal Services Center's efforts to create an online 
mapping viewer depicting 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: <a href='http://www.csc.noaa.gov/slr'>&lt;http://www.csc.noaa.gov/slr&gt;</a>
 These data depict the mapping confidence of the associated Sea Level 
Rise inundation data, for the sea level rise amount specified. Areas 
that have a low degree of confidence, or high uncertainty, represent 
locations that may be mapped correctly (either as inundated or dry) less
 than 8 out of 10 times. Areas that have a high degree of confidence, or
 low uncertainty, represent locations that will be correctly mapped 
(either as inundated or dry) more than 8 out of 10 times or that there 
is an 80 percent degree of confidence that these areas are correctly 
mapped. Areas mapped as dry (no inundation) with a high confidence or 
low uncertainty are coded as 0. Areas mapped as dry or wet with a low 
confidence or high uncertainty are coded as 1. Areas mapped as wet 
(inundation) with a high confidence or low uncertainty are coded as 2. 
The NOAA Coastal Services Center has tentatively adopted an 80 percent 
rank (as either inundated or not inundated) as the zone of relative 
confidence. The use of 80 percent has no special significance but is a 
commonly used rule of thumb measure to describe economic systems 
(Epstein and Axtell, 1996). In short, the method includes the 
uncertainty in the lidar derived elevation data (root mean square error,
 or RMSE) and the uncertainty in the modeled tidal surface from the NOAA
 VDATUM model (RMSE). This uncertainty is combined and mapped to show 
that the inundation depicted in this data is not really a hard line, but
 rather a zone with greater and lesser chances of getting wet. For a 
detailed description of the confidence level and its computation, please
 see the Mapping Inundation Uncertainty document available at: <a href='http://www.csc.noaa.gov/slr/viewer/assets/pdfs/Elevation_Mapping_Confidence_Methods.pdf'>&lt;http://www.csc.noaa.gov/slr/viewer/assets/pdfs/Elevation_Mapping_Confidence_Methods.pdf&gt;</a>.<br /><br />Please see <a href='http://maps.massgis.state.ma.us/czm/moris/metadata/moris_noaa_slr_0ft.htm' target='_blank'>http://maps.massgis.state.ma.us/czm/moris/metadata/moris_noaa_slr_0ft.htm</a> for more details.
[]
{'title': 'NOAA Coastal Inundation Uncertainty - Current Mean Higher High Water', 'author': 'MassGIS', 'comments': '', 'subject': 'NOAA Coastal Inundation Uncertainty - Current Mean Higher High Water', 'category': '', 'keywords': 'Coastal Inundation Uncertainty, NOAA, CZM, MassGOS, Massachusetts, MassGIS', 'credits': 'NOAA, CZM, MassGIS', 'Title': '', 'Author': '', 'Comments': '', 'Subject': '', 'Category': '', 'AntialiasingMode': 'Best', 'TextAntialiasingMode': 'Force', 'Keywords': ''}
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