Identification_Information: 
  Citation: 
    Citation_Information: 
      Originator: Pacific Islands Benthic Habitat Mapping Center (PIBHMC), Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA)
      Publication_Date: 20100701
      Title: 10 m Gridded bathymetry of Swains Island, American Samoa, South Pacific (Arc ASCII format)
      Geospatial_Data_Presentation_Form: raster digital data
      Online_Linkage: https://www.soest.hawaii.edu/pibhmc/cms/data-by-location/american-samoa/swains-island/swains-island-bathymetry/
      Online_Linkage: http://www.soest.hawaii.edu/pibhmc
  Description: 
    Abstract: Gridded (10 m cell size) bathymetry of the slope environment of
      Swains Island, American Samoa, South Pacific.
      Almost complete bottom coverage was achieved in depths between
      7 and 4800 meters (10 m grid includes data to 300 m). The bathymetry dataset
      includes Simrad EM300 and Reson 8101ER multibeam data collected from the
      10th - 13th of February 2006.
    Purpose: The data were collected in support of Coral Reef Conservation Program goals
      to map all shallow (0-30 m) coral reefs in US Pacific waters and priority
      moderate (> 30 m) depth areas by 2009. The data are being used to provide
      bathymetric and backscatter data for previously unmapped areas; in support
      of ecosystem management requirements for benthic habitat mapping and
      location of Essential Fish Habitat; and to study the geologic features of
      the area.
    Supplemental_Information: Data were collected aboard the NOAA Ship Hiialakai, a 218' United States
      National Oceanographic and Atmospheric Administration research ship. The NOAA
      Ship Hiialakai's survey sensors include a 30 kHz Simrad EM300 sonar
      and a 300 kHz Simrad EM3002D sonar, which provide bathymetry and
      imagery data, a TSS/Applanix POS/MV Model 320, which measures position,
      velocity, attitude and heading, and a Seabird SBE 9/11 plus CTD used to
      measure sound velocity profiles.  Sensor configuration for the Hi'ialakai for
      cruise HI-06-02 is documented in the cruise/multibeam metadata file
      HI0602_MB_Metadata.txt.
      
      Data were also collected aboard the R/V AHI (Acoustic Habitat Investigator),
      a 25' survey launch owned and operated by the NOAA Pacific Islands
      Fisheries Science Center in Honolulu, HI.  The R/V AHI's survey sensors
      include a 240 kHz RESON 8101-ER sonar providing bathymetry and imagery
      data, a TSS/Applanix POS/MV Model 320 which measures position, velocity,
      attitude and heading, and a Seabird SBE 19 CTD used to measure sound
      velocity profiles.  Sensor configuration for the AHI for cruise
      AHI-06-02 is documented in the cruise/multibeam metadata file
      AHI0602_MB_Metadata.txt.
  Time_Period_of_Content: 
    Time_Period_Information: 
      Range_of_Dates/Times: 
        Beginning_Date: 20040210
        Ending_Date: 20060213
    Currentness_Reference: ground condition
  Status: 
    Progress: Complete
    Maintenance_and_Update_Frequency: As needed
  Spatial_Domain: 
    Bounding_Coordinates: 
      West_Bounding_Coordinate: -171.218623090848
      East_Bounding_Coordinate: -170.938117186678
      North_Bounding_Coordinate: -10.935484848778
      South_Bounding_Coordinate: -11.188300163771
  Keywords: 
    Theme: 
      Theme_Keyword_Thesaurus: NCEI Geoportal Filter
      Theme_Keyword: CoRIS_Metadata
    Theme: 
      Theme_Keyword_Thesaurus: CRCP Project
      Theme_Keyword: Benthic Habitat Mapping and Characterization - American Samoa and PRIA
      Theme_Keyword: 1084
    Theme: 
      Theme_Keyword_Thesaurus: CoRIS Discovery Thesaurus
      Theme_Keyword: Geographic Information > Bathymetry
    Theme: 
      Theme_Keyword_Thesaurus: ISO 19115 Topic Category
      Theme_Keyword: elevation
      Theme_Keyword: 006
    Theme: 
      Theme_Keyword_Thesaurus: CoRIS Theme Thesaurus
      Theme_Keyword: EARTH SCIENCE > Biosphere > Aquatic Habitat > Reef Habitat > Description
      Theme_Keyword: EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Bathymetry
      Theme_Keyword: EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Water Depth
    Place: 
      Place_Keyword_Thesaurus: CoRIS Place Thesaurus
      Place_Keyword: OCEAN BASIN > Pacific Ocean > American Samoa > Swains Atoll (11S171W0001)
      Place_Keyword: COUNTRY/TERRITORY > United States of America > American Samoa > American Samoa > Swains Atoll (11S171W0001)
    Place: 
      Place_Keyword_Thesaurus: CoRIS Region
      Place_Keyword: AmSam
  Access_Constraints: None
  Use_Constraints: These data are not to be used for navigation purposes.
    Please acknowledge the NOAA Coral Reef Ecosystem Division,
    Pacific Islands Fisheries Science Center and the Pacific Islands Benthic
    Habitat Mapping Center, School of Ocean and Earth Science and Technology, University
    of Hawaii as the sources of this information.
  Point_of_Contact: 
    Contact_Information: 
      Contact_Organization_Primary: 
        Contact_Organization: Pacific Islands Benthic Habitat Mapping Center (PIBHMC), Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA)
        Contact_Person: John Rooney
      Contact_Address: 
        Address_Type: mailing and physical address
        Address: NOAA IRC
        Address: NMFS/PIFSC/CRED
        Address: 1845 WASP Blvd., Building 176
        City: Honolulu
        State_or_Province: HI
        Postal_Code: 96818
      Contact_Voice_Telephone: 808 725-5360
      Contact_Facsimile_Telephone: 808 725-5429
      Contact_Electronic_Mail_Address: nmfs.pic.credinfo@noaa.gov
      Contact_Instructions: e-mail preferred
  Browse_Graphic: 
    Browse_Graphic_File_Name: https://www.soest.hawaii.edu/pibhmc/amsamoa_images/Swains_10m_445.jpg
    Browse_Graphic_File_Description: Gridded Bathymetry
    Browse_Graphic_File_Type: JPG
  Data_Set_Credit: Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science
    Center (PIFSC), NOAA and Pacific Islands Benthic Habitat Mapping Center, School of Ocean
    and Earth Science and Technology, University of Hawaii
  Security_Information: 
    Security_Classification_System: Not applicable
    Security_Classification: Unclassified
    Security_Handling_Description: Not applicable
Data_Quality_Information: 
  Attribute_Accuracy: 
    Attribute_Accuracy_Report: Data are collected for resource management
      and research purposes and are tested for internal consistency; however,
      no effort is made to compare these data to external references or to
      other published data.
  Logical_Consistency_Report: These data are believed to be logically consistent
    though no tests were performed
  Completeness_Report: Complete
  Positional_Accuracy: 
    Horizontal_Positional_Accuracy: 
      Horizontal_Positional_Accuracy_Report: Horizontal positioning system: GPS C/A
        Horizontal position accuracy: 25 meters
    Vertical_Positional_Accuracy: 
      Vertical_Positional_Accuracy_Report: Range resolution of sonar: varies with depth
        Raw sounding resolution: varies with depth
        Vertical accuracy of gridded product ~ 1% of water depth
  Lineage: 
    Process_Step: 
      Process_Description: Multibeam swath files are acquired in the Generic Sensor Format (GSF) and
        are edited on a swath by swath basis using SAIC's SABER editing software.
        The edited swath files are then combined into a Pure File Magic (PFM) format
        in SABER and area based editing is performed. The edited PFM is then exported
        as X,Y,Z. The resulting X,Y,Z data are then gridded using nearneighbor, a Generic
        Mapping Tools (GMT) algorithm that reads arbitrarily located X,Y,Z and assigns an
        average value to each grid node that has one or more points within a 50 m radius
        centered on the node and outputs a netCDF grid file.  GMT is an open source collection
        of tools for manipulating geographic data sets. Grid nodes with more than one value are
        set to the average value and unconstrained nodes are set to NaN. Finally, the netCDF grid
        is clipped at a depth that minimizes data gaps for the specified grid cell size and
        then converted to an ArcGIS ASCII file format using LINUX/UNIX commands in
        combination with GMT. Additional information about GMT can be found at:
        www.soest.hawaii.edu/gmt and additional information about the multibeam data
        processing is recorded in the cruise metadata reports AHI0602_MB_Metadata.txt
        and HI0602_MB_Metadata.txt.
      Process_Date: 20100609
Spatial_Data_Organization_Information: 
  Direct_Spatial_Reference_Method: Raster
  Raster_Object_Information: 
    Raster_Object_Type: Grid Cell
    Row_Count: 559
    Column_Count: 697
    Vertical_Count: 1
Spatial_Reference_Information: 
  Horizontal_Coordinate_System_Definition: 
    Planar: 
      Grid_Coordinate_System: 
        Grid_Coordinate_System_Name: Universal Transverse Mercator
        Universal_Transverse_Mercator: 
          UTM_Zone_Number: -2
          Transverse_Mercator: 
            Scale_Factor_at_Central_Meridian: 0.9996
            Longitude_of_Central_Meridian: -171
            Latitude_of_Projection_Origin: 0
            False_Easting: 500000
            False_Northing: 0
      Planar_Coordinate_Information: 
        Planar_Coordinate_Encoding_Method: Row and Column
        Coordinate_Representation: 
          Abscissa_Resolution: 10
          Ordinate_Resolution: 10
        Planar_Distance_Units: meters
    Geodetic_Model: 
      Horizontal_Datum_Name: D_WGS_1984
      Ellipsoid_Name: WGS_1984
      Semi-major_Axis: 6378137.000000
      Denominator_of_Flattening_Ratio: 298.257224
  Vertical_Coordinate_System_Definition: 
    Depth_System_Definition: 
      Depth_Datum_Name: mean lower low water
      Depth_Resolution: 0.01
      Depth_Distance_Units: meters
      Depth_Encoding_Method: Attribute Values
Entity_and_Attribute_Information: 
  Overview_Description: 
    Entity_and_Attribute_Overview: Depth values are real values based on the average of the
      soundings that fell within the extracted grid cells.  The number of
      soundings per grid cell range from >1000 soundings in shallow depths
      to as few as 20 soundings in deeper areas.  A total error budget for
      this survey has not been developed. Therefore, the accuracy of depth
      measurements should be considered to be within 1 per cent of water depth.
    Entity_and_Attribute_Detail_Citation: none
Distribution_Information: 
  Distributor: 
    Contact_Information: 
      Contact_Organization_Primary: 
        Contact_Organization: Pacific Islands Benthic Habitat Mapping Center (PIBHMC), Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA)
        Contact_Person: John Rooney
      Contact_Address: 
        Address_Type: mailing and physical address
        Address: NOAA IRC
        Address: NMFS/PIFSC/CRED
        Address: 1845 WASP Blvd., Building 176
        City: Honolulu
        State_or_Province: HI
        Postal_Code: 96818
      Contact_Voice_Telephone: 808 725-5360
      Contact_Facsimile_Telephone: 808 725-5429
      Contact_Electronic_Mail_Address: nmfs.pic.credinfo@noaa.gov
      Contact_Instructions: e-mail preferred
  Resource_Description: Downloadable Data
  Distribution_Liability: These data are not to be used for navigational purposes.
    NOAA makes no warranty regarding these data, expressed or implied,
    nor does the fact of distribution constitute such a warranty.
    NOAA cannot assume liability for any damages caused by any errors
    or omissions in these data, nor as a result of the failure of
    these data to function on a particular system.
  Standard_Order_Process: 
    Digital_Form: 
      Digital_Transfer_Information: 
        Format_Name: Arc ASCII
        Format_Information_Content: Arc ASCII can be converted to Arc
          Raster using ArcToolbox Conversion Tools (ASCIItoRaster).
      Digital_Transfer_Option: 
        Online_Option: 
          Computer_Contact_Information: 
            Network_Address: 
              Network_Resource_Name: ftp://ftp.soest.hawaii.edu/pibhmc/website/data/amsamoa/bathymetry/Swains_10m.asc.zip
    Fees: None
Metadata_Reference_Information: 
  Metadata_Date: 20241215
  Metadata_Review_Date: 20101102
  Metadata_Contact: 
    Contact_Information: 
      Contact_Organization_Primary: 
        Contact_Organization: Pacific Islands Benthic Habitat Mapping Center (PIBHMC), Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA)
        Contact_Person: CRED Data Management Team
      Contact_Address: 
        Address_Type: mailing and physical address
        Address: NOAA IRC
        Address: NMFS/PIFSC/CRED
        Address: 1845 WASP Blvd., Building 176
        City: Honolulu
        State_or_Province: HI
        Postal_Code: 96818
      Contact_Voice_Telephone: 808 725-5360
      Contact_Facsimile_Telephone: 808 725-5429
      Contact_Electronic_Mail_Address: nmfs.pic.credinfo@noaa.gov
      Contact_Instructions: e-mail preferred
  Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
  Metadata_Standard_Version: FGDC-STD-001-1998
  Metadata_Time_Convention: Universal Time
  Metadata_Access_Constraints: None
  Metadata_Use_Constraints: None
CoRIS: 
  CoRIS_ID: 20101102025233
  CoRIS_Children: None
  CoRIS_Beginning_Date: 20040210
  CoRIS_Ending_Date: 20060213
  CoRIS_Metadata_Link: https://www.coris.noaa.gov/metadata/records/html/swains_10m_asc.html
  CoRIS_Tracking_ID: 6025