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: 20141009
      Title: Mosaic of bathymetry derived from multispectral WV-2 
        satellite imagery of Agrihan Island, Territory of Mariana, USA
      Geospatial_Data_Presentation_Form: raster digital data
      Online_Linkage: http://www.soest.hawaii.edu/pibhmc/
      Online_Linkage: http://www.soest.hawaii.edu/pibhmc/pibhmc_cnmi_agr_bathy.htm
  Description:
    Abstract: Bathymetric data derived from a multipectral World View-2 satellite
      image mosaiced to provide near complete coverage of nearshore 
      terrain around the islands. Bathymetry values shallower than ~20 m were 
      derived by gauging the reletive attenuation of coastal, blue, green and yellow 
      spectral radiance as a function of depth. A multiple linear regression analysis
      of coastal, blue, green and yellow band spectral values against depth determined 
      the variables of y-intercept, coastal,blue, green and yellow 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 4.8 software program 
      while data editing and integration was performed using ArcGIS 10. This 
      data set is for the shelf environment of Agrihan Island, Mariana.
    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 derived bathymetry 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:
      Original Wordl View-2 imagery was purchased to support the Pacific Islands
      Geographic Information System (GIS) project and National Ocean Service's 
      (NOS) coral mapping activities. Orthographically corrected World View-2 images 
      were provided by NOAA. The metadata for these World View-2 
      images are documented in the original product metadata, 
      11DEC24012757-M2AS-053850193010_01_P005 and 12MAY03010521-M2AS-053850193010_01_P007. 
      (http://www.soest.hawaii.edu/pibhmc/)    
  Time_Period_of_Content:
    Time_Period_Information:
      Range_of_Dates/Times:
        Beginning_Date: 20030826
        Ending_Date: 20120503
    Currentness_Reference: ground condition
  Status:
    Progress: Complete
    Maintenance_and_Update_Frequency: As needed
  Spatial_Domain: 
    Bounding_Coordinates:
      West_Bounding_Coordinate: 145.597
      East_Bounding_Coordinate: 145.725
      North_Bounding_Coordinate: 18.842
      South_Bounding_Coordinate: 18.705
  Keywords: 
    Theme:
      Theme_Keyword_Thesaurus: CoRIS Discovery Thesaurus
      Theme_Keyword: Geographic Information > Bathymetry
    Theme: 
      Theme_Keyword_Thesaurus: CoRIS Theme Keyword Thesaurus
      Theme_Keyword: EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Bathymetry
    Theme: 
      Theme_Keyword_Thesaurus: CoRIS Theme Keyword Thesaurus
      Theme_Keyword: EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Water Depth
    Theme: 
      Theme_Keyword_Thesaurus: CoRIS Theme Keyword Thesaurus
      Theme_Keyword: EARTH SCIENCE > Biosphere > Zoology > Corals > 
        Reef Monitoring and Assessment > Remote Sensing > Satellite 
        (digital scans) > World View-2
    Theme:
      Theme_Keyword_Thesaurus: None
      Theme_Keyword: Slope
      Theme_Keyword: Bathymetry
    Theme:
      Theme_Keyword_Thesaurus: ISO 19115 Topic Category
      Theme_Keyword: elevation
      Theme_Keyword: 006
    Place:
      Place_Keyword_Thesaurus: None
      Place_Keyword: Agrihan Island
      Place_Keyword: Commonwealth of the Northern Mariana Islands
      Place_Keyword: United States of America
    Place: 
      Place_Keyword_Thesaurus: CoRIS Place Thesaurus
      Place_Keyword: COUNTRY/TERRITORY > Northern Mariana Islands> Agrihan Island (18N145E0002)
      Place_Keyword: OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Agrihan Island (16N145E0003)
  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 as the 
      sources of this information.
  Browse_Graphic:
    Browse_Graphic_File_Name: ftp://ftp.soest.hawaii.edu/pibhmc/website/data/cnmi-guam/bathymetry/AGR_dball_2m_445.jpg
    Browse_Graphic_File_Description: Gridded Bathymetry
    Browse_Graphic_File_Type: jpg
  Data_Set_Credit: Benthic Habitat Mapping Group, Coral Reef Ecosystem Division
     (CRED), Pacific Islands Fisheries Science Center (PIFSC), NOAA
  Native_Data_Set_Environment: ArcGIS ASCII file or ArcGIS Grid file, 
    bathymetry derived from 2x2m multispectral satellite imagery (World View-2)
    using ENVI 4.8.
  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: 
        Vertical accuracy of derived bathymetry product: 2 meter range 
  Lineage:
    Process_Step:
      Process_Date: 20140919
      Process_Description: 
        Multiple tools in ENVI 4.8 were used to complete the following 
        processing steps: Data conversion from digital number to radiance,
        correction for atmosphere and water surface reflection, 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 Microsoft program Excel 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+(Mcoastal)(Xcoastal)+(Mblue)(Xblue)+
        (Mgreen)(Xgreen)+(Myellow)(XYellow).Two products were derived, 
        from the original images  11DEC24012757-M2AS-053850193010_01_P005 
        and 12MAY03010521-M2AS-053850193010_01_P007.The MLR variables for 
        image  11DEC24012757-M2AS-053850193010_01_P005 were Yint=48.6730490, 
        Mcoastal=-1.278749828, Mblue=-0.443251739, Mgreen=2.078005407, 
        Myellow=-0.391474601 which was used for the West Shore, for image
        12MAY03010521-M2AS-053850193010_01_P007 were Yint=-1.991017711, 
        coastal=-0.471700952, Mblue=-0.383778197, Mgreen=1.591490893, 
        Myellow=-0.220491633 which was used for East, North and South Shore. 
        The derived bathymetry from each image were in turn mosaiced 
        giving the data from 11DEC24012757-M2AS-053850193010_01_P005 priority 
        over 12MAY03010521-M2AS-053850193010_01_P007 in overlapping areas due to
        its statistaclly higher accuracy.
        A detailed description of all processing steps and an error analysis of 
        each derived bathymetry grid used is available upon request.
Spatial_Data_Organization_Information:
  Direct_Spatial_Reference_Method: Raster
  Raster_Object_Information:
    Raster_Object_Type: Pixel
    Row_Count:  5146
    Column_Count: 3642
    Vertical_Count: 1
Spatial_Reference_Information:
  Horizontal_Coordinate_System_Definition:
    Planar:
      Planar_Coordinate_Information:
        Planar_Coordinate_Encoding_Method: row and column
        Coordinate_Representation:
          Abscissa_Resolution: 2.000000
          Ordinate_Resolution: 2.000000
        Planar_Distance_Units: meters
      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
            Latitude_of_Projection_Origin: 0.000000
            False_Easting: 500000.000000
            False_Northing: 0.000000
    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:  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., Bldg. 176
        City: Honolulu
        State_or_Province: Hawaii
        Postal_Code: 96818
        Country: USA
      Contact_Voice_Telephone: 808 725-5360
      Contact_Electronic_Mail_Address: pibhmc@soest.hawaii.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: ftp://ftp.soest.hawaii.edu/pibhmc/website/data/cnmi-guam/bathymetry/agr_dball_2m.zip
    Fees: None
Metadata_Reference_Information:
  Metadata_Date: 2014109
  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: Honlulu
        State_or_Province: Hawaii
        Postal_Code: 96818
        Country: USA
      Contact_Voice_Telephone: 808 725-5360
      Contact_Facsimile_Telephone: 808 725-5429
      Contact_Electronic_Mail_Address: nmfs.pic.credinfo@noaa.gov
  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



