Identification_Information: 


 Citation: 
   Citation_Information: 
      Originator: 
        United States Geological Survey (USGS),  
      Publication_Date: 2005
      Title: 
        XYZ format of the 2004 Multibeam Backscatter Data in the
          Northeastern Channel Islands Region, Southern California
      Geospatial_Data_Presentation_Form: XYZ 
      Online_Linkage:
          http://pubs.wr.usgs.gov/of/2005/1153/ci-data.html
      Online_Linkage:
           http://pubs.wr.usgs.gov/of/2005/1153/ci-data.html/bathyxyz.zip
     


      Larger_Work_Citation:
         Citation_Information:
               Originator: Peter Dartnell
               Originator: Guy Cochrane
               Originator: Mary Elaine Dunaway
               Publication_Date: 2005
               Title: Multibeam Bathymetry and Backscatter Data:  
                      Northeastern Channel Islands Region, Southern  
                      California
               Edition: 1.0
               Series_Information:
                      Series_Name: Open-File Report
                      Issue_Identification: 2005-1153
               Publication_Information:
                   Publication_Place: Western Coastal and Marine
                      Geology, Menlo Park, CA
                   Publisher: U.S. Geological Survey, Coastal and Marine
                          Geology Program
               Online_Linkage:
                  http://pubs.wr.usgs.gov/of/2005/1153/ci-index.html


  Description: 
    Abstract: 
      XYZ ASCII format data generated from the 2004 
      multibeam sonar survey of the Northeastern Channel 
      Islands, CA Region. The data include high-resolution acoustic, 
      corrected backscatter. 
    Purpose: 
      These data are intended for science researchers, 
      students, policy makers, and the general public. 
      The data can be used with geographic information systems (GIS) 
      or other software to display acoustic backscatter data 
      of the Northeastern Channel Islands, CA Region. 
    Supplemental_Information: 
      Information for USGS Coastal and Marine Geology related 
      activities are online at 
      < http://walrus.wr.usgs.gov/infobank/e/e104sc/html/e-1-04-sc.meta.html> 

  Time_Period_of_Content: 
    Time_Period_Information: 
      Range_of_Dates/Times: 
        Beginning_Date: 20040806
        Ending_Date: 20040815
    Currentness_Reference: ground condition

  Status:     
      Progress: Complete
      Maintenance_and_Update_Frequency: As needed

  Spatial_Domain: 
    Bounding_Coordinates: 
     West_Bounding_Coordinate: -119.72
     East_Bounding_Coordinate: -119.03
     North_Bounding_Coordinate: 34.33
     South_Bounding_Coordinate: 33.88

  Keywords: 
     Theme: 
        Theme_Keyword_Thesaurus: None
        Theme_Keyword: Marine Geology
        Theme_Keyword: Multibeam
        Theme_Keyword: Backscatter
        Theme_Keyword: Acoustic
        Theme_Keyword: U.S. Geological Survey
        Theme_Keyword: USGS
        Theme_Keyword: Coastal and Marine Geology Program
        Theme_Keyword: CMGP
    
     Theme
        Theme_Keyword_Thesaurus: ISO 19115 Topic Category
        Theme_Keyword: oceans and estuaries
        Theme_Keyword: imageryBaseMapsEarthCover

     Place: 
       Place_Keyword_Thesaurus: None
       Place_Keyword: Santa Barbara Channel
       Place_Keyword: Channel Islands
       Place_Keyword: CA
       Place_Keyword: Southern California
       Place_Keyword: USA


  Access_Constraints:None


  Use_Constraints: 

    Please recognize the U.S. Geological Survey (USGS) 
    as the source of this information. 
    USGS-authored or produced data and information 
    are in the public domain. 


  Point_of_Contact: 
    Contact_Information: 
      Contact_Person_Primary: 
        Contact_Person: Peter Dartnell
        Contact_Organization: 
          United States Geological Survey (USGS)
          Coastal and Marine Geology (CMG)
      Contact_Position: Physical Scientist
      Contact_Address: 
        Address_Type: mailing and physical address
        Address: USGS, MailStop 999, 345 Middlefield Road
        City: Menlo Park
        State_or_Province: CA
        Postal_Code: 94025-3561
        Country: USA
      Contact_Voice_Telephone: (650) 329-5460
      Contact_Facsimile_Telephone: (650) 329-5411
      Contact_Electronic_Mail_Address:pdartnell@usgs.gov






Data_Quality_Information: 


  Attribute_Accuracy: 
    Attribute_Accuracy_Report: Not determined.


  Logical_Consistency_Report: Point features present.


  Completeness_Report: Complete


  Positional_Accuracy: 
    Horizontal_Positional_Accuracy: 
      Horizontal_Positional_Accuracy_Report: 0.5 meters
    Vertical_Positional_Accuracy
      Vertical_Positional_Accuracy_Report: 0.05 percent of the water depth. 


  Lineage: 
    Process_Step: 
      Process_Description: 
        The multibeam bathymetry and acoustic backscatter data were collected 
        along a continuous swath perpendicular to the direction of the ship using a 
        Kongsberg Simrad EM1002 multibeam sonar system. The data are cleaned 
        of bad navigation and depth readings and corrected for tides to mean     
        lower low water datum using a predictive tide model. The depth readings are 
        gridded into a common grid. The gridded data are converted to ArcInfo GRID 
        format using ArcInfo's ASCIIGRID command. The GRID was converted to 
        an XYZ ASCII file by using the GRIDPOINT, ADDXY, and Tables' UNLOAD commands. 
      Process_Date: 20041130
      Process_Contact: 
        Contact_Information: 
          Contact_Person_Primary: 
            Contact_Person: Peter Dartnell
            Contact_Organization: 
              United States Geological Survey (USGS)
              Coastal and Marine Geology (CMG)
          Contact_Position: Physical Scientist
          Contact_Address: 
            Address_Type: mailing and physical address
            Address: USGS, MailStop 999, 345 Middlefield Road
            City: Menlo Park
            State_or_Province: CA
            Postal_Code: 94025-3561
            Country: USA
          Contact_Voice_Telephone: (650) 329-5460
          Contact_Facsimile_Telephone: (650) 329-5411
          Contact_Electronic_Mail_Address: pdartnell@usgs.gov






Spatial_Data_Organization_Information: 


  Direct_Spatial_Reference_Method: Point


  Point_and_Vector_Object_Information: 
    SDTS_Terms_Description: 
      SDTS_Point_and_Vector_Object_Type: Point
      



Spatial_Reference_Information: 


  Horizontal_Coordinate_System_Definition: 
    Geographic: 
      Latitude_Resolution: 0.00015
      Longitude_Resolution: 0.00015
      Geographic_Coordinate_Units: Decimal degrees
    Geodetic_Model: 
      Horizontal_Datum_Name: WGS84
      Ellipsoid_Name: WGS84
      Semi-major_Axis: 6378137.00 meters
      Denominator_of_Flattening_Ratio: 0.003352811






Entity_and_Attribute_Information: 


  Overview_Description: 
    Entity_and_Attribute_Overview: 
          
      Example of Backscatter XYZ ASCII file
      > Longitude, Latitude, DN Value
      >(decimal degree, decimal degree, DN value) 
      >-119.54421,33.72640,207.696
      >-119.54413,33.72640,206.398
      >-119.54405,33.72640,203.770
      >-119.54398,33.72640,201.170
      >-119.54390,33.72640,201.098
      >-119.54382,33.72640,202.064
      >-119.54374,33.72640,202.693
      >-119.54367,33.72640,202.720
      >-119.54444,33.72640,201.992


    Entity_and_Attribute_Detail_Citation: none  






Distribution_Information: 


  Distributor: 
    Contact_Information: 
      Contact_Organization_Primary: 
        Contact_Organization: 
          United States Geological Survey (USGS)
          Information Services
      Contact_Address: 
        Address_Type: mailing and physical address
        Address: 345 Middlefield Rd., MS-999
        City: Menlo Park
        State_or_Province: CA
        Postal_Code: 94025
        Country: USA
      Contact_Voice_Telephone: (650)329-5460


  Resource_Description: E-1-04-SC data set


  Distribution_Liability: 


    These data not intended for navigational purposes. 


    Although these data have been used by the 
    U.S. Geological Survey, U.S. Department of the Interior, 
    these data and information are provided 
    with the understanding that they are not guaranteed 
    to be usable, timely, accurate, or complete. 
    Users are cautioned to consider carefully 
    the provisional nature of these data and information 
    before using them for decisions that concern personal or 
    public safety or the conduct of business that involves 
    substantial monetary or operational consequences. 
    Conclusions drawn from, or actions undertaken 
    on the basis of, such data and information are 
    the sole responsibility of the user. 


    Neither the U.S. Government nor any agency thereof, 
    nor any of their employees, contractors, or subcontractors, 
    make any warranty, express or implied, 
    nor assume any legal liability or responsibility 
    for the accuracy, completeness, or usefulness 
    of any data, software, information, apparatus, product, or 
    process disclosed, nor represent that its use 
    would not infringe on privately owned rights. 

    Trade, firm, or product names and other references 
    to non-USGS products and services are provided 
    for information only and do not constitute 
    endorsement or warranty, express or implied, 
    by the USGS, USDOI, or U.S. Government, 
    as to their suitability, content, usefulness, 
    functioning, completeness, or accuracy.




  Standard_Order_Process: 
    Digital_Form: 
      Digital_Transfer_Information: 
        Format_Name: ASCII
      Digital_Transfer_Option: 
        Online_Option: 
          Computer_Contact_Information: 
            Network_Address: 
              Network_Resource_Name: 
                none
    Fees: None






Metadata_Reference_Information: 


  Metadata_Date: 20050130


  Metadata_Contact: 
    Contact_Information: 
      Contact_Person_Primary: 
        Contact_Person: Peter Dartnell
        Contact_Organization: 
          United States Geological Survey (USGS)
          Coastal and Marine Geology (CMG)
      Contact_Position: Physical Scientist
      Contact_Address: 
        Address_Type: mailing and physical address
        Address: USGS, MailStop 999, 345 Middlefield Road
        City: Menlo Park
        State_or_Province: CA
        Postal_Code: 94025-3561
        Country: USA
      Contact_Voice_Telephone: (650) 329-5460
      Contact_Facsimile_Telephone: (650) 329-5411
      Contact_Electronic_Mail_Address: pdartnell@usgs.gov


  Metadata_Standard_Name: 
    Content Standard for Digital Geospatial Metadata 
    ("CSDGM version 2")


  Metadata_Standard_Version: FGDC-STD-001-1998


  Metadata_Time_Convention: universal time