Locations>VERTICAL LOCATION>SEA FLOOR

NTHMP DEM Project

Federal Geographic Data Committee (FGDC) Metadata:
Identification_Information:
Citation:
Citation_Information:
Originator: DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce (comp)NTHMP > National Tsunami Hazard Mitigation Program
Publication_Date: 20090420
Title: NTHMP DEM Project
Edition:
Geospatial_Data_Presentation_Form:
Series_Information:
Series_Name: NTHMP DEMs
Issue_Identification: Project metadata record
Publication_Information:
Publication_Place: Boulder, Colorado
Publisher: DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
Other_Citation_Details:
Online_Linkage: http://www.ngdc.noaa.gov/mgg/inundation/nthmp/nthmp.html
Description:
Abstract:
ABSTRACT: NOAA's National Geophysical Data Center (NGDC) is building high-resolution digital elevation models (DEMs) to support individual coastal States as part of the National Tsunami Hazard Mitigation Program's (NTHMP) efforts to improve community preparedness and hazard mitigation. These integrated bathymetric-topographic DEMs are used to support tsunami and coastal inundation mapping. Bathymetric, topographic, and shoreline data used in DEM compilation are obtained from various sources, including NGDC, the U.S. National Ocean Service (NOS), the U.S. Geological Survey (USGS), the U.S. Army Corps of Engineers (USACE), the Federal Emergency Management Agency (FEMA), and other federal, state, and local government agencies, academic institutions, and private companies. DEMs are referenced to various vertical and horizontal datums depending on the specific modeling requirements of each State. For specific datum information on each DEM, refer to the appropriate DEM documentation. Cell sizes also vary depending on the specification required by modelers in each State, but typically range from 8/15 arc-second (~16 meters) to 8 arc-seconds (~240 meters). CURRENTNESS REFERENCE: ground condition NATIVE: ESRI ArcCatalog 9.2.4.1420 PURPOSE: Developed for the National Tsunami Hazard Mitigation Program to support tsunami modeling and coastal inundation mapping efforts.
Purpose:
Not Available
Supplemental_Information:
Not Available
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20090101
Ending_Date: Unknown
Currentness_Reference:Unknown
Status:
Progress: In Work
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Description_of_Geographic_Extent:
Bounding_Coordinates:
West_Bounding_Coordinate: -180.0
East_Bounding_Coordinate: -116.0
North_Bounding_Coordinate: 62.0
South_Bounding_Coordinate: 32.0
Keywords:
Theme:
Theme_Keyword_Thesaurus: GCMD SCIENCE PARAMETERS
Theme_Keyword_Thesaurus: PROJECT
Theme_Keyword_Thesaurus: ANCILLARY KEYWORDS
Theme_Keyword_Thesaurus: ISO TOPIC CATEGORY
Theme_Keyword_Thesaurus: DATA SET LANGUAGE
Theme_Keyword: EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TOPOGRAPHICAL RELIEF
Theme_Keyword: EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION
Theme_Keyword: EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > SEAFLOOR TOPOGRAPHY
Theme_Keyword: EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > WATER DEPTH
Theme_Keyword: EARTH SCIENCE > OCEANS > COASTAL PROCESSES > COASTAL ELEVATION
Theme_Keyword: EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > BATHYMETRY
Theme_Keyword: ESIP > EARTH SCIENCE INFORMATION PARTNERS PROGRAM
Theme_Keyword: Integrated Bathymetry And Topography
Theme_Keyword: Wdc/mgg, Boulder > World Data Center For Marine Geology And Geophysics, Boulder
Theme_Keyword: V: < 1 Meter
Theme_Keyword: ELEVATION
Theme_Keyword: ENGLISH
Place:
Place_Keyword_Thesaurus: GCMD
Place_Keyword: OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN
Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA
Place_Keyword: VERTICAL LOCATION > LAND SURFACE
Place_Keyword: VERTICAL LOCATION > SEA FLOOR
Access_Constraints: ACCESS CONSTRAINTS: None DISTRIBUTION LIABILITY: While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty. CUSTOM ORDER PROCESS: Contact the data center
Use_Constraints:
None
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: BARRY W. EAKINS
Contact_Position: TECHNICAL CONTACT
Contact_Position: DIF AUTHOR
Contact_Address:
Address_Type: Mailing and Physical Address
Address: NOAA/NESDIS/NGDC
Address: 325 Broadway, E/GC3
City: Boulder
State_or_Province: Colorado
Postal_Code: 80305-3328
Country: USA
Contact_Voice_Telephone: 303-497-6505
Contact_Facsimile_Telephone: 303-497-6513
Contact_Electronic_Mail_Address: Barry.Eakins@noaa.gov
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Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
LOGICAL CONSISTENCY REPORT: Datasets are visually compared internally and externally (with other overlapping datasets. satellite images, and maps) in ESRI ArcGIS for identification of anomalous elevations or data inconsistencies. Where elevation inconsistencies occurred, the most recent and/or highest resolution data set is selected for use in that region. Elevations in the older and/or lower-resolution datasets are deleted prior to building the DEMs. COMPLETENESS REPORT: NGDC makes every effort to obtain all available digital topographic and bathymetric datasets in each region for use in building the DEMs. HORIZONTAL POSITIONAL ACCURACY REPORT: The horizontal accuracy of bathymetric and topographic features in the DEMs are dependent upon the accuracy of the input datasets used to determine corresponding cell values. VERTICAL POSITIONAL ACCURACY REPORT: The vertical accuracy of bathymetric and topographic features in the DEM is dependent upon the accuracy of the input datasets used to determine corresponding cell values. Gridding interpolation to determine values between sparse NOS hydrographic soundings in deep-water degrades the vertical accuracy of deep-water elevations. LINEAGE/PROCESS STEP: PROCESS DESCRIPTION: All datasets obtained by NGDC are converted to common horizontal and vertical datums based on the States' requirements using FME. They are also converted to common file format, ESRI point shapefiles, for visualization and inspection. LINEAGE/PROCESS STEP: PROCESS DESCRIPTION: Datasets are visually inspected with ArcGIS for identification and editing of data anomalies. Datasets are then compared with overlapping datasets to ensure data consistency. LINEAGE/PROCESS STEP: PROCESS DESCRIPTION: xyz files of the bathymetric data are surfaced using GMT's 'surface' tool onto an 8 arc-second grid that is interpolated to fill empty cells. Points extracted every 10 meters along the coastline are also included to ensure that the bathymetric grid reaches zero at the coast. The resulting Arc ASCII grid is imported into ArcGIS and clipped to the coastline to remove values over land. LINEAGE/PROCESS STEP: PROCESS DESCRIPTION: xyz files for each input dataset are gridded using MB-System's 'mbgrid' tool, which utilizes a high-tension spline interpolation method to fill grid cells with no input elevation values. Preferential weighting is given to more recent, higher-accuracy datasets. Gridding is typically performed in quadrants, each with a 5% data buffer. The grids are imported in ArcGIS and seamlessly merged to create the final DEM. LINEAGE/PROCESS STEP: PROCESS DESCRIPTION: The DEMs are quantitatively evaluated by comparing with source datasets. They are visually evaluated by converting to UTM-zone coordinates (units of meters horizontally and vertically) and then creating a slope grid to identify gridding artifacts in the DEMs. PROCESS DATE: 20090420 PROCESS DATE: 20081031 PROCESS DATE: 20081031 PROCESS DATE: 20090420 PROCESS DATE: 20090420
Logical_Consistency_Report:
Not Available
Completeness_Report:
Not Available
Lineage:
Process_Step:
Process_Description:
Not Available
Process_Date: Unknown
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Spatial_Reference_Information:
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Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
Contact_Person: BARRY W. EAKINS
Contact_Position: DATA CENTER CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Address: NOAA/NESDIS/NGDC
Address: 325 Broadway, E/GC3
City: Boulder
State_or_Province: Colorado
Postal_Code: 80305-3328
Country: USA
Contact_Voice_Telephone: 303-497-6505
Contact_Facsimile_Telephone: 303-497-6513
Contact_Electronic_Mail_Address: Barry.Eakins@noaa.gov
Resource_Description: ______Downloadable_Data ____
Distribution_Liability:
Not Available
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: netCDF 1
Transfer_Size: 400000000
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://www.ngdc.noaa.gov/
Access_Instructions:
DATA CENTER URL
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://www.ngdc.noaa.gov/mgg/inundation/nthmp/nthm...
Access_Instructions:
Web page for searching and downloading DEMs
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://www.ngdc.noaa.gov/nmmrview/xmls/xml-to-text...
Access_Instructions:
View Source Metadata document from the Metadata Manager and Repository (NMMR).
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://www.ngdc.noaa.gov/mgg/inundation/nthmp/nthm...
Access_Instructions:
Home page
Fees: None
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Metadata_Reference_Information:
Metadata_Date: 20100528
Metadata_Review_Date: 20111229
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: BARRY W. EAKINS
Contact_Position: TECHNICAL CONTACT
Contact_Position: DIF AUTHOR
Contact_Address:
Address_Type: Mailing and Physical Address
Address: NOAA/NESDIS/NGDC
Address: 325 Broadway, E/GC3
City: Boulder
State_or_Province: Colorado
Postal_Code: 80305-3328
Country: USA
Contact_Voice_Telephone: 303-497-6505
Contact_Facsimile_Telephone: 303-497-6513
Contact_Electronic_Mail_Address: Barry.Eakins@noaa.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
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