NOAA Office for Coastal Management Sea Level Rise Data: Coastal Flood Threshold Inundation Extent
Office for Coastal Management (OCM)Data Set (DS) | ID: 48101 | Published / External
Item Identification
Title: | NOAA Office for Coastal Management Sea Level Rise Data: Coastal Flood Threshold Inundation Extent |
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Short Name: | NOAA_OCM_Coastal_Flood_metadata |
Status: | Completed |
Publication Date: | 2012 |
Abstract: |
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 extent of coastal areas resulting from National Weather Service issued Coastal Flood Advisories. The Coastal Flood Advisory areas are based on individual Weather Forecast Office (WFO) guidance thresholds at monitored tide stations and are referenced to the MLLW tidal datum. 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. The process uses either two or three source datasets depending on geographic location to derive the final inundation rasters: the Digital Elevation Model (DEM) of the area, a tidal surface model that represents spatial tidal variability, and an interpolated threshold surface if there is significant difference between flooding thresholds between varying geographic areas (Ex: Chesapeake Bay area). 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 MLLW tidal datum in orthometric values (North American Vertical Datum of 1988).The interpolated threshold surface is created using the flooding threshold values found at select NOAA tide gages used by the NWS to define flooding events. The methods 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 and extent, not exact location, of inundation from NWS issued Coastal Flood Advisories. |
Purpose: |
The purpose of these data is to show the potential inundation extent caused by NWS issued Coastal Flood Advisories. |
Notes: |
10958 |
Supplemental Information: |
A detailed methodology for producing these data can be found via the following url: https://coast.noaa.gov/data/digitalcoast/pdf/slr-flood-frequency-methods.pdf Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.0000001 Longitude_Resolution: 0.0000001 Geographic_Coordinate_Units: Decimal degrees Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 Ellipsoid_Name: Geodetic Reference System 80 Semi-major_Axis: 6378137.000000 Denominator_of_Flattening_Ratio: 298.257222101 Vertical_Coordinate_System_Definition: Altitude_System_Definition: Altitude_Datum_Name: North American Vertical Datum of 1988 Altitude_Resolution: 0.001 Altitude_Distance_Units: meters Altitude_Encoding_Method: Explicit elevation coordinate included with horizontal coordinates |
Keywords
Theme Keywords
Thesaurus | Keyword |
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Global Change Master Directory (GCMD) Science Keywords | Earth Science > Land Surface > Geomorphic Landforms/Processes > Coastal Processes > Flooding |
Global Change Master Directory (GCMD) Science Keywords | Earth Science > Land Surface > Geomorphic Landforms/Processes > Coastal Processes > Sea Level Changes |
Global Change Master Directory (GCMD) Science Keywords | Earth Science > Land Surface > Topography > Terrain Elevation > Digital Elevation/Terrain Model (Dem) |
ISO 19115 Topic Category | climatologyMeteorologyAtmosphere |
None | Bathymetry/Topography |
None | elevation |
None | environment |
None | flooding |
None | inundation |
None | oceans |
None | sea level rise |
None | Shoreline |
Spatial Keywords
Thesaurus | Keyword |
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Global Change Master Directory (GCMD) Location Keywords | Continent > North America > United States Of America |
None | United States |
Physical Location
Organization: | Office for Coastal Management |
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City: | Charleston |
State/Province: | SC |
Data Set Information
Data Set Scope Code: | Data Set |
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Maintenance Frequency: | None Planned |
Distribution Liability: |
Any conclusions drawn from the analysis of this information are not the responsibility of the Office for Coastal Management or its partners. |
Data Set Credit: | Acknowledgment of the NOAA Office for Coastal Management as a data source would be appreciated in products developed from these data, and such acknowledgment as is standard for citation and legal practices for data source is expected. |
Support Roles
Data Steward
Date Effective From: | 2012 |
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Date Effective To: | |
Contact (Organization): | NOAA Office for Coastal Management (NOAA/OCM) |
Address: |
2234 South Hobson Ave Charleston, SC 29405-2413 |
Email Address: | coastal.info@noaa.gov |
Phone: | (843) 740-1202 |
URL: | https://coast.noaa.gov |
Distributor
Date Effective From: | 2012 |
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Date Effective To: | |
Contact (Organization): | NOAA Office for Coastal Management (NOAA/OCM) |
Address: |
2234 South Hobson Ave Charleston, SC 29405-2413 |
Email Address: | coastal.info@noaa.gov |
Phone: | (843) 740-1202 |
URL: | https://coast.noaa.gov |
Metadata Contact
Date Effective From: | 2012 |
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Date Effective To: | |
Contact (Organization): | NOAA Office for Coastal Management (NOAA/OCM) |
Address: |
2234 South Hobson Ave Charleston, SC 29405-2413 |
Email Address: | coastal.info@noaa.gov |
Phone: | (843) 740-1202 |
URL: | https://coast.noaa.gov |
Point of Contact
Date Effective From: | 2012 |
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Date Effective To: | |
Contact (Organization): | NOAA Office for Coastal Management (NOAA/OCM) |
Address: |
2234 South Hobson Ave Charleston, SC 29405-2413 |
Email Address: | coastal.info@noaa.gov |
Phone: | (843) 740-1202 |
URL: | https://coast.noaa.gov |
Extents
Currentness Reference: | Publication Date |
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Extent Group 1
Extent Group 1 / Geographic Area 1
W° Bound: | -160.74 | |
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E° Bound: | -65.097 | |
N° Bound: | 49.276 | |
S° Bound: | 17.75 |
Extent Group 1 / Time Frame 1
Time Frame Type: | Range |
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Start: | 2012 |
End: | 2016 |
Access Information
Security Class: | Unclassified |
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Data Access Procedure: |
This data may be downloaded at: https://coast.noaa.gov/slr; |
Data Access Constraints: |
None |
Data Use Constraints: |
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 may appear during Coastal Flood Advisory conditions. 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. |
URLs
URL 1
URL: | https://www.coast.noaa.gov/slr |
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URL Type: |
Online Resource
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URL 2
URL: | https://coast.noaa.gov/digitalcoast/tools/slr |
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URL Type: |
Online Resource
|
URL 3
URL: | https://coast.noaa.gov/slrdata |
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URL Type: |
Online Resource
|
URL 4
URL: | https://www.coast.noaa.gov |
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URL Type: |
Online Resource
|
Activity Log
Activity Log 1
Activity Date/Time: | 2017-11-01 |
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Description: |
Date that the source FGDC record was last modified. |
Activity Log 2
Activity Date/Time: | 2017-11-14 |
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Description: |
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. |
Data Quality
Completeness Report: |
The Flood Frequency inundation extent areas currently shown in the NOAA CSC Sea Level Rise and Coastal Flooding Impacts Viewer. The current status of areas of coverage for the tool can be accessed at: https://coast.noaa.gov/slr |
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Conceptual Consistency: |
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. |
Lineage
Sources
NOAA OCM Digital Elevation Models
Contact Name: | NOAA Office for Coastal Management |
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Publish Date: | 2016-01-01 |
Extent Type: | Range |
Extent Start Date/Time: | 2012 |
Extent End Date/Time: | 2016 |
Citation URL: | https://www.coast.noaa.gov/slr |
Source Contribution: |
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
Contact Name: | NOAA Office for Coastal Management |
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Publish Date: | 2016-01-01 |
Extent Type: | Range |
Extent Start Date/Time: | 2012 |
Extent End Date/Time: | 2016 |
Citation URL: | http://vdatum.noaa.gov |
Source Contribution: |
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 |
Process Steps
Process Step 1
Description: |
The process to derive the inundation rasters 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 MLLW, 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 one 8-bit single value raster representing the extent of inundation. 3. If necessary, an additional flood threshold surface is created using spatial interpolation techniques to capture the variability between flooding thresholds within large geographic locations. This interpolated threshold surface is then added to the MLLW VDatum tidal surface to create a total water surface layer referenced to the MLL tidal datum. The total water surface would then be used with the DEM in calculating the final flood threshold layer. |
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Process Date/Time: | 2016-01-01 00:00:00 |
Source: | NOAA OCM Digital Elevation Models |
Catalog Details
Catalog Item ID: | 48101 |
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Metadata Record Created By: | Anne Ball |
Metadata Record Created: | 2017-11-14 14:15+0000 |
Metadata Record Last Modified By: | SysAdmin InPortAdmin |
Metadata Record Last Modified: | 2019-07-02 15:17+0000 |
Metadata Record Published: | 2017-11-16 |
Owner Org: | OCM |
Metadata Publication Status: | Published Externally |
Do Not Publish?: | N |
Metadata Next Review Date: | 2018-11-17 |