Identification_Information: 
  Citation: 
    Citation_Information: 
      Originator: Hogrefe Natural Systems Analysis in collaboration with
        Davey Jones Locker GIS Laboratory, Oregon State Universtiy for
        Coral Reef Ecosystem Division, NOAA Pacific Islands Fisheries
        Science Center, Pacific Islands Benthic Habitat Mapping Center
      Publication_Date: 20090123
      Title: Mosaic of 10 m gridded multibeam bathymetry and bathymetry derived
        from multispectral IKONOS satellite imagery of Asuncion Island,
        Commonwealth of the Northern Marianas Islands, USA
      Geospatial_Data_Presentation_Form: raster digital data
      Online_Linkage: http://www.soest.hawaii.edu/pibhmc/pibhmc_cnmi_asu_bathy.htm
  Description: 
    Abstract: Gridded multibeam bathymetry is integrated with bathymetry
      derived from multpectral IKONOS satellite data. Gridded (10 m cell
      size) multibeam bathymetry collected aboard NOAA Ship Hiialaka'i and
      R/V AHI. Bathymetry values shallower than 15 m were derived by
      gauging the relative attenuation of blue and green spectral radiance
      as a function of depth.  A multiple linear regression analysis of
      linearized blue and green band spectral values against depth determined
      the variables of y-intercept, blue slope and green slope values.
      Variables then used in multivariate slope intercept formula to derive
      depth. Variables were adjusted to improve the statistical accuracy and
      spatial coverage of the final derived bathymetry product. Digital image
      processing to derive depths conducted with the ENVI 4.5 software program
      while data editing and integration was performed using ArcGIS 9.3.  This
      dataset is for the shelf environment of Asuncion Island, Commonwealth of
      the Northern Marianas Islands, USA
    Purpose: The data were derived in support of NOAA Coral Reef Conservation
      Program goals. Goal 1 is to map all U.S. Coral Reef Ecosystems.
      This data set specifically addresses Objective 1 and 4: to develop
      high-resolution benthic maps and to characterize priority deep
      water reefs and associated habitats.  This integration of derived
      bathymetry with multibeam sonar data provides a GIS layer with
      expanded spatial coverage that may be used for benthic and essential
      fish habitat characterization, and for the study of geologic features.
      By combining the dataset with other bathymetry, backscatter, derivatives,
      and in situ data, they collectively compose benthic habitat maps
      designed to be used to understand and predict shallow depth (0m to 150m)
      benthic habitats for organisms that inhabit coral reef ecosystems.
    Supplemental_Information: Gridded multibeam data were collected aboard the Hi'ialakai, a 218'
      United States National Oceanographic and Atmospheric Administration
      (NOAA) research ship, and 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
      metadata for the bathymetry is documented in the product metadata,
      Asuncion_10m.txt.
      http://www.soest.hawaii.edu/pibhmc/pibhmc_cnmi_asu.htm
      Original IKONOS imagery was purchased to support the Pacific Islands
      Geographic Information System (GIS) project and National Ocean Service's
      (NOS) coral mapping activities. Orthographically corrected IKONOS Imagery
      was provided by NOAA's National Centers for Coastal Ocean Science, Center
      for Coastal Monitoring and Assessment. The metadata for this IKONOS
      imagery is documented in the original product metadata, po_107144_metadata
      (https://www.soest.hawaii.edu/pibhmc/cms)
  Time_Period_of_Content: 
    Time_Period_Information: 
      Range_of_Dates/Times: 
        Beginning_Date: 20030403
        Ending_Date: 20070608
    Currentness_Reference: ground condition
  Status: 
    Progress: Complete
    Maintenance_and_Update_Frequency: As needed
  Spatial_Domain: 
    Bounding_Coordinates: 
      West_Bounding_Coordinate: 145.361576
      East_Bounding_Coordinate: 145.437089
      North_Bounding_Coordinate: 19.727122
      South_Bounding_Coordinate: 19.646644
  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 - Commonwealth of the Northern Mariana Islands and Guam
      Theme_Keyword: 1398
    Theme: 
      Theme_Keyword_Thesaurus: CoRIS Theme Thesaurus
      Theme_Keyword: EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Bathymetry
      Theme_Keyword: EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Water Depth
      Theme_Keyword: EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Remote Sensing > Satellite (digital scans) > IKONOS
    Theme: 
      Theme_Keyword_Thesaurus: ISO 19115 Topic Category
      Theme_Keyword: elevation
      Theme_Keyword: 006
    Theme: 
      Theme_Keyword_Thesaurus: CoRIS Discovery Thesaurus
      Theme_Keyword: Geographic Information > Bathymetry
    Theme: 
      Theme_Keyword_Thesaurus: None
      Theme_Keyword: Slope
      Theme_Keyword: Bathymetry
      Theme_Keyword: Multibeam sonar
    Place: 
      Place_Keyword_Thesaurus: None
      Place_Keyword: Asuncion Island
      Place_Keyword: Commonwealth of the Northern Marianas Islands
      Place_Keyword: United States of America
    Place: 
      Place_Keyword_Thesaurus: CoRIS Place Thesaurus
      Place_Keyword: OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Asuncion Island > Asuncion Island (19N145E0001)
      Place_Keyword: COUNTRY/TERRITORY > Northern Mariana Islands > Asuncion Island > Asuncion Island (19N145E0001)
    Place: 
      Place_Keyword_Thesaurus: CoRIS Region
      Place_Keyword: CNMI
  Access_Constraints: None
  Use_Constraints: These data are not to be used for navigation
    purposes. Please acknowledge NOAA Pacific Islands Fisheries
    Science Center, the Joint Institute for Marine and
    Atmospheric Research (JIMAR) University of Hawaii and Davey
    Jones Locker GIS Laboratory Oregon State University as the
    sources of this information.
  Browse_Graphic: 
    Browse_Graphic_File_Name: https://www.soest.hawaii.edu/pibhmc/CNMI_images/asu_bathymetry_mb&IKONOS_10m_445.jpg
    Browse_Graphic_File_Description: Gridded Bathymetry
    Browse_Graphic_File_Type: jpeg
  Data_Set_Credit: NOAA PIFSC CRED, the Pacific Islands Benthic Habitat
    Mapping Center and Davey Jones Locker GIS Laboratory
    Oregon State University
  Security_Information: 
    Security_Classification_System: Not applicable
    Security_Classification: Unclassified
    Security_Handling_Description: Not applicable
  Native_Data_Set_Environment: ArcGIS ASCII file or ArcGIS Grid file,
    bathymetry derived from 4x4m multispectral satellite imagery (IKONOS)
    using ENVI 4.5, multibeam and derived bathymetry were integrated using
    ArcGIS 9.3
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 sonar product: ~ 1% of water depth
        Vertical accuracy of derived bathymetry product: 5 meter range
  Lineage: 
    Process_Step: 
      Process_Description: Multiple tools in ENVI 4.5 were used to complete the following
        processing steps: Data conversion from digital number to radiance,
        correction for atmosphere and water surface reflection,
        linearization of spectral decay as function of depth, masking of
        non-applicable values, and bathymetric derivation using variables
        from multiple linear regression analysis.  Multiple tools in
        ArcGIS 9.3 were used for dataset integration and to extract values
        for the multiple linear regression analysis and subsequent error
        analyses.  The statisitcs program S-Plus was used for the multiple
        linear regression analysis to provide original variables for depth
        derivation.  The multivariate slope intercept formula used to
        derive depth was Depth=Yint+(Mblue)(Xblue)+(Mgreen)(Xgreen). Two
        derived products from the image asuncion_107144_msi_rat.pix (Asu144),
        were integrated to enhance statistical accuracy and expand spatial
        coverage.  The original MLR variables for Asu144 were Yint=-12.6994,
        Mblue=-8.1453, and Mgreen=10.8586.  Two additional products were
        derived to enhance accuracy and expand coverage.  The first
        (Asu144_5m_DB9) was derived using increased linearized blue and green
        band slope values of -16.1453 and 18.8586 to increase statistical
        accuracy.  The second (Asu144_5m_DB11) was derived using a increased
        slope value of -8.6994 with the original linearized blue and green
        band slope values. Data from Asu144_5m_DB9 replaced concurrent data
        from Asu144_5m_DB11 during integration due to better statistical
        accuracy.
        The derived bathymetry mosaic was (Asu_DBall_mos) was then integrated
        with the multibeam sonar data 10m grid, with sonar data prioritized over
        derived data, to create the final product (Asu_10m_DBMB).
        A detailed description of all processing steps is available at:
        http://oregonstate.edu/~hogrefek/Cookbook/Cookbook_042108.pdf
        An error analysis of each derived bathymetry grid used is available
        upon request.
      Process_Date: 20090121
Spatial_Data_Organization_Information: 
  Direct_Spatial_Reference_Method: Raster
  Raster_Object_Information: 
    Raster_Object_Type: Pixel
    Row_Count: 932
    Column_Count: 783
    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: 55
          Transverse_Mercator: 
            Scale_Factor_at_Central_Meridian: 0.999600
            Longitude_of_Central_Meridian: 147.000000
            Latitude_of_Projection_Origin: 0.000000
            False_Easting: 500000.000000
            False_Northing: 0.000000
      Planar_Coordinate_Information: 
        Planar_Coordinate_Encoding_Method: Row and Column
        Coordinate_Representation: 
          Abscissa_Resolution: 10.000000
          Ordinate_Resolution: 10.000000
        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
Distribution_Information: 
  Distributor: 
    Contact_Information: 
      Contact_Organization_Primary: 
        Contact_Organization: NOAA PIFSC CRED PIBHMC and DJLab OSU
        Contact_Person: Kyle Hogrefe
      Contact_Address: 
        Address_Type: mailing and physical address
        Address: 104 Wilkinson Hall, Oregon State University
        City: Corvallis
        State_or_Province: Oregon
        Postal_Code: 97331
        Country: USA
      Contact_Voice_Telephone: 541-737-2397
      Contact_Electronic_Mail_Address: hogrefek@geo.oregonstate.edu
  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 Grid
        Format_Information_Content: Arc Grid can be opened directly using
          ArcMap or ArcCatalog.
      Digital_Transfer_Option: 
        Online_Option: 
          Computer_Contact_Information: 
            Network_Address: 
              Network_Resource_Name: http://www.soest.hawaii.edu/pibhmc/pibhmc_cnmi_asu_bathy.htm
    Fees: None
Metadata_Reference_Information: 
  Metadata_Date: 20241215
  Metadata_Review_Date: 20091222
  Metadata_Contact: 
    Contact_Information: 
      Contact_Person_Primary: 
        Contact_Person: Kyle Hogrefe
        Contact_Organization: NOAA PIFSC CRED PIBHMC and DJLab OSU
      Contact_Address: 
        Address_Type: mailing and physical address
        Address: 104 Wilkinson Hall, Oregon State University
        City: Corvallis
        State_or_Province: Oregon
        Postal_Code: 97331
        Country: USA
      Contact_Voice_Telephone: 541-740-8444
      Contact_Electronic_Mail_Address: hogrefek@geo.oregonstate.edu
  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: 20091222064604
  CoRIS_Children: None
  CoRIS_Beginning_Date: 20030403
  CoRIS_Ending_Date: 20070608
  CoRIS_Metadata_Link: https://www.coris.noaa.gov/metadata/records/html/asu_10m_dbmb_metadata.html
  CoRIS_Tracking_ID: 4383