NOAA Coastal Services Center Sea Level Rise Data: Mapping Confidence

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Reference_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator:

Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Coastal Services Center (CSC)

Publication_Date: 2013

Title:

NOAA Coastal Services Center Sea Level Rise Data: Mapping Confidence

Publication_Information:

Publication_Place: Charleston, SC

Publisher: NOAA's Ocean Service, Coastal Services Center (CSC)

Online_Linkage: <http://www.csc.noaa.gov/slr>

Online_Linkage: <http://www.csc.noaa.gov>

Description:

Abstract:

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: <http://www.csc.noaa.gov/slr>
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: <http://www.csc.noaa.gov/slr/viewer/assets/pdfs/Elevation_Mapping_Confidence_Methods.pdf>

Purpose:

The purpose of these data is to show the level of confidence of the sea level rise inundation data based on the uncertainty in the lidar elevation data and the uncertainty in the NOAA VDATUM model.

Supplemental_Information:

A detailed methodology for producing these data can be found via the following url: <http://www.csc.noaa.gov/slr/viewer/assets/pdfs/Elevation_Mapping_Confidence_Methods.pdf>

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 2012

Ending_Date: 2013

Currentness_Reference:

The dataset is derived from the most recent elevation and VDATUM data available at the date of processing.

Status:

Progress: Complete

Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: 144.5

East_Bounding_Coordinate: -64.5

North_Bounding_Coordinate: 49.276

South_Bounding_Coordinate: -14.5

Keywords:

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category

Theme_Keyword: climatologyMeteorologyAtmosphere

Theme:

Theme_Keyword_Thesaurus: None

Theme_Keyword: Bathymetry/Topography

Theme_Keyword: sea level rise

Theme_Keyword: Shoreline

Theme_Keyword: inundation

Theme_Keyword: flooding

Theme_Keyword: elevation

Theme_Keyword: environment

Theme_Keyword: oceans

Theme_Keyword: confidence

Theme_Keyword: uncertainty

Place:

Place_Keyword_Thesaurus: None

Place_Keyword: United States

Access_Constraints: None

Use_Constraints:

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.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: NOAA Coastal Services Center

Contact_Address:

Address_Type: mailing and physical

Address: 2234 South Hobson Ave.

City: Charleston

State_or_Province: SC

Postal_Code: 29405-2413

Contact_Voice_Telephone: 843-740-1202

Contact_Electronic_Mail_Address: csc.info@noaa.gov

Data_Set_Credit:

Acknowledgment of the NOAA Coastal Services Center 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.

Data_Quality_Information:

Logical_Consistency_Report:

The data were reviewed for consistency and anomalies.

Completeness_Report:

The mapping confidence 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: <http://www.csc.noaa.gov/slr>

Lineage:

Process_Step:

Process_Description:

1. NOAA CSC has created an ArcGIS model, based on the method described at <http://www.csc.noaa.gov/slr/viewer/assets/pdfs/Elevation_Mapping_Confidence_Methods.pdf>, that uses the uncertainty values from NOAA VDATUM and the uncertainty of the elevation data to create depth rasters and z-score rasters for each sea level rise inundation level. 2. Each z-score raster is reclassified to areas of low and high confidence. Areas mapped as dry (no inundation) with a high confidence or low uncertainty are classified as 0. Areas mapped as dry or wet with a low confidence or high uncertainty are classified as 1. Areas mapped as wet (inundation) with a high confidence or low uncertainty are classified as 2.

Process_Date: 2013

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

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: NOAA Coastal Services Center

Contact_Address:

Address_Type: mailing and physical

Address: 2234 South Hobson Ave.

City: Charleston

State_or_Province: SC

Postal_Code: 29405-2413

Contact_Voice_Telephone: 843-740-1202

Contact_Electronic_Mail_Address: csc.info@noaa.gov

Resource_Description: Downloadable Data

Distribution_Liability:

Any conclusions drawn from the analysis of this information are not the responsibility of the Coastal Services Center or its partners.

Custom_Order_Process: This data may be downloaded at: <http://www.csc.noaa.gov/slr>

Metadata_Reference_Information:

Metadata_Date: 201302

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: NOAA Coastal Services Center

Contact_Address:

Address_Type: mailing and physical

Address: 2234 South Hobson Avenue

City: Charleston

State_or_Province: SC

Postal_Code: 29405-2413

Contact_Voice_Telephone: 843-740-1202

Contact_Electronic_Mail_Address: csc.info@noaa.gov

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998