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: 20070223
      Title: CRED Gridded 20m bathymetry and IKONOS estimated depths of Midway Atoll, Hawaii, USA (Arc ASCII format)
      Geospatial_Data_Presentation_Form: digital data
      Online_Linkage: http://www.soest.hawaii.edu/pibhmc/pibhmc_nwhi.htm
  Description: 
    Abstract: Gridded bathymetry and IKONOS estimated depths of the shelf and slope
      environments of Midway Atoll, Hawaii, USA. Bottom coverage was achieved in
      depths between 0 and 500 meters. The ASCII includes multibeam bathymetry from
      the Simrad EM300, Simrad EM3002d, and Reson 8101 multibeam sonars collected as
      of October 2006 by the NOAA Coral Reef Ecosystem Division in depths between 20
      and 5000 meters. The ASCII also includes estimated depths derived from high
      resolution IKONOS satellite imagery by the NOAA/NOS/NCCOS/CCMA Remote Sensing
      Team in shallow water between 0 and 16 meters.
    Purpose: This ASCII was created using data gathered from multibeam soundings and IKONOS
      estimated depths for use as a planning and reference document. The data are also
      being used for benthic habitat mapping, for locating Essential Fish Habitat, and
      for studying geologic features of the area. Refer to supplemental information
      for description of instrument and survey.
    Supplemental_Information: Multibeam data were collected aboard the NOAA Ship Hi'ialakai, a 218' United
      States National Oceanographic and Atmospheric Administration research ship. The
      NOAA Ship Hi'ialakai'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.
      
      Multibeam 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.
      
      IKONOS estimated depths were produced using rule-based, semi-automated image analysis of
      high-resolution satellite imagery for nine locations in the Northwestern Hawaiian Islands.
      For more information about the estimated depth data see the following online link:
      http://mercury.ornl.gov/metadata/nbii/html/nos/est%5Fdepth%5Fnwhi.html
      
      Specific equipment configurations are documented in metadata from IKONOS Estimated
      Depths and cruises AHI0306, HI0503, and HI0609.  These metadata can be accessed at:
      http://www.soest.hawaii.edu/pibhmc/pibhmc_cruise-catalog.htm
  Time_Period_of_Content: 
    Time_Period_Information: 
      Range_of_Dates/Times: 
        Beginning_Date: 2000
        Ending_Date: 20060720
    Currentness_Reference: ground condition
  Status: 
    Progress: Complete
    Maintenance_and_Update_Frequency: As needed
  Spatial_Domain: 
    Bounding_Coordinates: 
      West_Bounding_Coordinate: -177.534230
      East_Bounding_Coordinate: -177.180948
      North_Bounding_Coordinate: 28.405081
      South_Bounding_Coordinate: 28.128483
  Keywords: 
    Theme: 
      Theme_Keyword_Thesaurus: CRCP Project
      Theme_Keyword: Benthic Habitat Mapping and Characterization - Northwestern and Main Hawaiian Islands
      Theme_Keyword: 1217
    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 > Oceans > Bathymetry/Seafloor Topography > Bathymetry
    Theme: 
      Theme_Keyword_Thesaurus: None
      Theme_Keyword: Bathymetry
      Theme_Keyword: Multibeam sonar
      Theme_Keyword: satellite imagery
      Theme_Keyword: estimated depth
    Place: 
      Place_Keyword_Thesaurus: None
      Place_Keyword: Midway Atoll
      Place_Keyword: Hawaii
      Place_Keyword: Northwestern Hawaiian Islands
      Place_Keyword: United States of America
    Place: 
      Place_Keyword_Thesaurus: CoRIS Place Thesaurus
      Place_Keyword: OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Northwestern Hawaiian Islands > Midway Atoll (28N177W0001)
      Place_Keyword: COUNTRY/TERRITORY > United States of America > Hawaii > Honolulu > Midway Atoll (28N177W0001)
    Place: 
      Place_Keyword_Thesaurus: CoRIS Region
      Place_Keyword: NWHI
  Access_Constraints: None
  Use_Constraints: These data are not to be used for navigation purposes.
    Please acknowledge NOAA and the Joint Institute for Marine and Atmospheric Research,
    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_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: http://www.soest.hawaii.edu/pibhmc/NWHI_images/Midway_20m_500.jpg
    Browse_Graphic_File_Description: Multibeam Bathymetry and IKONOS Estimated Depths
    Browse_Graphic_File_Type: JPEG
  Data_Set_Credit: PIBHMC, CRED, PIFSC, NOAA and JIMAR
  Security_Information: 
    Security_Classification_System: Not applicable
    Security_Classification: Unclassified
    Security_Handling_Description: Not applicable
  Native_Data_Set_Environment: ArcGIS ASCII file created in a LINUX environment
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 (SPS)
        Horizontal position accuracy: 25 m
    Vertical_Positional_Accuracy: 
      Vertical_Positional_Accuracy_Report: 1 m
        Raw sounding resolution: Variable
  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 points with a defined grid cell size and the points are combined
        with X,Y,Z IKONOS estimated depth points. The resulting X,Y,Z data are then
        gridded using xyz2grd, a Generic Mapping Tools (GMT) algorithm that converts
        an ASCII or binary table to a netCDF grid file format. 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.
      Process_Date: 20060811
Spatial_Data_Organization_Information: 
  Direct_Spatial_Reference_Method: Raster
  Raster_Object_Information: 
    Raster_Object_Type: Grid Cell
    Row_Count: 1527
    Column_Count: 1728
    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: 1
          Transverse_Mercator: 
            Scale_Factor_at_Central_Meridian: 0.9996
            Longitude_of_Central_Meridian: -177
            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: 20
          Ordinate_Resolution: 20
        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 meter.
    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_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.
      Digital_Transfer_Option: 
        Online_Option: 
          Computer_Contact_Information: 
            Network_Address: 
              Network_Resource_Name: ftp://ftp.soest.hawaii.edu/pibhmc/website/data/nwhi/bathymetry/Midway_20m.grd.zip
    Fees: None
Metadata_Reference_Information: 
  Metadata_Date: 20170420
  Metadata_Review_Date: 20090219
  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_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: 20090219031757
  CoRIS_Children: None
  CoRIS_Beginning_Date: 20000101
  CoRIS_Ending_Date: 20060720
  CoRIS_Metadata_Link: https://www.coris.noaa.gov/metadata/records/html/cred_gridded_bathy_midway_nwhi_20m_asc.html
  CoRIS_Tracking_ID: 2950