48105
NOAA Office for Coastal Management Sea Level Rise Data: Current Mean Higher High Water Inundation Extent
NOAA_OCM_SLR_0ft_metadata
Data Set
Published / External
37230
Inundation
Project
Completed
2023
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 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: https://www.coast.noaa.gov/slr
These data depict the potential inundation of coastal areas resulting from current Mean Higher High Water (MHHW) conditions. The process used to produce the data can be described as a modified bathtub approach that attempts to account for both local/regional tidal variability as well as hydrological connectivity. The process uses two source datasets to derive the final inundation rasters and polygons and accompanying low-lying polygons: the Digital Elevation Model (DEM) of the area and a tidal surface model that represents spatial tidal variability. The tidal model is created using the NOAA National Geodetic Survey's VDATUM datum transformation software (http://vdatum.noaa.gov) in conjunction with spatial interpolation/extrapolation methods and represents the MHHW tidal datum in orthometric values (North American Vertical Datum of 1988).
The model used to produce these data does not account for erosion, subsidence, or any future changes in an area's hydrodynamics. It is simply a method to derive data in order to visualize the potential scale, not exact location, of inundation from sea level rise.
Both raster and vector data are provided. The raster data represent both the horizontal extent of inundation and depth above ground, in meters. The vector data represent the horizontal extent of both hydrologically connected and unconnected inundation. The vector "slr" data represent inundation that is hydrologically connected to the ocean. The vector "low" data represent areas that are hydrologically unconnected to the ocean, but are below MHHW and may also flood.
For more information, contact coastal.info@noaa.gov.
The purpose of these data is to show potential inundation from current Mean Higher High Water (MHHW) for the area.
10962
A detailed methodology for producing these data can be found via the following url:
https://coast.noaa.gov/data/digitalcoast/pdf/slr-inundation-methods.pdf
Theme
Global Change Master Directory (GCMD) Science Keywords
EARTH SCIENCE > LAND SURFACE > GEOMORPHIC LANDFORMS/PROCESSES > COASTAL PROCESSES > FLOODING
Theme
Global Change Master Directory (GCMD) Science Keywords
EARTH SCIENCE > LAND SURFACE > GEOMORPHIC LANDFORMS/PROCESSES > COASTAL PROCESSES > SEA LEVEL CHANGES
Theme
Global Change Master Directory (GCMD) Science Keywords
EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION > DIGITAL ELEVATION/TERRAIN MODEL (DEM)
Theme
ISO 19115 Topic Category
climatologyMeteorologyAtmosphere
Theme
ISO 19115 Topic Category
elevation
Theme
ISO 19115 Topic Category
environment
Theme
ISO 19115 Topic Category
oceans
Spatial
Global Change Master Directory (GCMD) Location Keywords
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA
Theme
Bathymetry/Topography
Theme
Shoreline
Theme
flooding
Theme
inundation
Theme
sea level rise
Spatial
United States
Office for Coastal Management
Charleston
SC
Data Set
As Needed
Any conclusions drawn from the analysis of this information are not the responsibility of the Office for Coastal Management or its partners.
Acknowledgment of the NOAA Office for Coastal Management as a data source would be appreciated in products developed from these data, and suchacknowledgment as is standard for citation and legal practices for data source is expected.
Data Steward
2023
Organization
NOAA Office for Coastal Management
NOAA/OCM
coastal.info@noaa.gov
2234 South Hobson Ave
Charleston
SC
29405-2413
(843) 740-1202
https://coast.noaa.gov
NOAA Office for Coastal Management Home Page
Online Resource
Distributor
2023
Organization
NOAA Office for Coastal Management
NOAA/OCM
coastal.info@noaa.gov
2234 South Hobson Ave
Charleston
SC
29405-2413
(843) 740-1202
https://coast.noaa.gov
NOAA Office for Coastal Management Home Page
Online Resource
Metadata Contact
2023
Organization
NOAA Office for Coastal Management
NOAA/OCM
coastal.info@noaa.gov
2234 South Hobson Ave
Charleston
SC
29405-2413
(843) 740-1202
https://coast.noaa.gov
NOAA Office for Coastal Management Home Page
Online Resource
Point of Contact
2023
Organization
NOAA Office for Coastal Management
NOAA/OCM
coastal.info@noaa.gov
2234 South Hobson Ave
Charleston
SC
29405-2413
(843) 740-1202
https://coast.noaa.gov
NOAA Office for Coastal Management Home Page
Online Resource
Publication Date
144.5
-64.5
49.276
-14.5
Discrete
2023
Geographic 2D
EPSG:4269
NAD83
North American Datum 1983
GRS 1980
6378137
298.257222101
1
Geodetic Latitude
Lat
degree
north
1
Geodetic Latitude
Lat
degree
north
2
Geodetic Longitude
Lon
degree
east
2
Geodetic Longitude
Lon
degree
east
Unclassified
This data may be downloaded at: https://www.coast.noaa.gov/slrdata
None
These data illustrate the scale of potential flooding, not the exact location, and do not account for erosion, subsidence, or future construction. Inundation is shown as it would appear during the highest high tides (excludes wind driven tides) with the sea level rise amount. These data should be used only as a screening-level tool for management decisions. As with all remotely sensed data, all features should be verified with a site visit. The dataset is provided "as is," without warranty to its performance, merchantable state, or fitness for any particular purpose. The entire risk associated with the results and performance of this dataset is assumed by the user. This dataset should be used strictly as a planning reference and not for navigation, permitting, or other legal purposes.
https://coast.noaa.gov/digitalcoast/tools/slr
Online Resource
https://coast.noaa.gov/slrdata
Online Resource
https://www.coast.noaa.gov
Online Resource
https://www.coast.noaa.gov/slr
Online Resource
2017-11-01
Date that the source FGDC record was last modified.
2017-11-14
Converted from FGDC Content Standards for Digital Geospatial Metadata (version FGDC-STD-001-1998) using 'fgdc_to_inport_xml.pl' script. Contact Tyler Christensen (NOS) for details.
The MHHW layer covers areas currently shown in the NOAA Sea Level Rise Viewer. The current status of areas of coverage for the tool can be accessed at: https://www.coast.noaa.gov/slr.
Standard methods for determining inundation were used. The vertical accuracy of these data is dependent on the source elevation data and the error associated with vertical datum conversions within NOAA's VDatum software.
NOAA OCM Digital Elevation Models
Organization
NOAA Office for Coastal Management
Originator
2016-01-01
Discrete
2023
https://www.coast.noaa.gov/slr
The digital elevation model (DEM) of an area serves as one of two source datasets used to derive inundation outputs. | Type of Source Media: online digital data
NOAA OCM VDATUM Tidal Surface Models
Organization
NOAA Office for Coastal Management
Originator
2016-01-01
Discrete
2023
http://vdatum.noaa.gov
The tidal conversion surface of an area serves as one of two source datasets used to create the inundation outputs and is derived from NOAA National Geodetic Survey's VDATUM software. | Type of Source Media: online digital data
1
The process to derive the inundation rasters and polygons and low-lying area polygons is as follows:
1. A tidal surface is generated using NOAA VDATUM tool and various spatial interpolation/extrapolation routines, dependent upon the area being mapped. The surface generated represents the spatial variability of offsets between MHHW, a tidal datum and NAVD88, an orthometric datum.
2. Using the DEM and the tidal surface, raster calculations are made using ArcGIS Spatial Analyst Raster Calculation tool to generate multiple rasters, one 32-bit floating point raster representing depth of inundation and one 8-bit single value raster representing the extent of inundation.
3. The hydrologic connectivity of the single value raster is evaluated using an 8-sided neighborhood rule in ArcGIS using the Region Group tool. The output raster from this process is then used to create a "hydro-connected" raster for further analysis. The output raster is also used to create data representing unconnected 'low-lying' areas that are below the water surface. For more information, see the detailed mapping methods at https://coast.noaa.gov/digitalcoast/tools/slr.html.
2023-01-01T00:00:00
NOAA OCM Digital Elevation Models
gov.noaa.nmfs.inport:48105
Anne Ball
2017-11-14T14:15:22
SysAdmin InPortAdmin
2023-05-30T18:09:30
2017-11-16
Office for Coastal Management
OCM
1002
Public
No
2017-11-16
1 Year
2018-11-16