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: 200704
      Title: CRED Optical Validation Data at Lisianski Island, 2004, to Support Benthic Habitat Mapping
      Geospatial_Data_Presentation_Form: Video imagery, track line navigation files, and log sheets
      Online_Linkage: http://www.soest.hawaii.edu/pibhmc/
  Description: 
    Abstract: Optical validation data were collected using a Tethered Optical Assessment Device (TOAD), an underwater sled
      equipped with an underwater digital video camera and lights. Data were collected at the Northwestern Hawaiian Islands,
      Lisianski Island to support Benthic Habitat Mapping efforts.
    Purpose: This data provides optical observations that will be correlated with bathymetry and acoustic backscatter
      imagery to develop a benthic habitat map of Lisianski Island.  Refer to supplemental information for description of
      instrument and survey.
    Supplemental_Information: Lisianski Island and adjacent Neva Shoals, located at 26N, 174W, is an open atoll ecosystem.
      The island is large (1.46 sq. km) and the coral reef habitats less than 100 m in depth are extensive (979 sq. km).
      Optical validation data were collected using the Tethered Optical Assessment Device (TOAD), a sled equipped with
      underwater video camera and lights.  These data are used to provide ground-truth validation that for benthic habitat
      maps based on multibeam echosounder surveys.  Camera sled deployments were conducted at night, usually between 1800
      and midnight.  Each tow was usually limited to 20 minutes of bottom time at a given location in order to allow for
      more tows to be conducted in a given work area and thus increase the spatial distribution of the observations. The
      camera sled was   deployed from lower arm of the starboard J-frame on the NOAA Ship Hi'ialakai.  At each station the
      ship was positioned with the wind on the starboard side and drifted downwind; occasional light turns were applied to
      the ship's screws if necessary to reduce the ship's motion.  The TOAD was lowered slowly to the bottom by the deck
      crew.  The operator monitored a live video feed from the camera and began recording data on two video tape recorders.
      When the camera reached bottom the deck crew was notified by radio to stop lowering.  The operator continued to
      monitor the vehicle and provided commands to raise or lower it to keep the camera just above the bottom.
      
      Equipment_Description: The TOAD was deployed from the lower arm of the vessel's J-frame.  The TOAD is a camera sled
      based on the Guildline MiniBat model 8820 tow body.  The frame has been extensively modified from its original
      configuration and was configured with a single ROS model 54-00100-13 color underwater video camera and two 500 W
      DeepSea Power & Light model 710-0400601 underwater lights mounted on the original sled frame.  The MiniBAT pressure
      sensor and wing controller was also mounted on the frame but no wings were installed.  Cable between the sled and
      the surface consisted of an underwater electrical cable (cable 1, blue in color) with a separate load-bearing line
      to support the sled frame.  The electrical cable was clipped to the line at regular intervals upon deployment and
      removed upon recovery.  The load-bearing line was led to the starboard capstan on the aft deck.  All TOAD surface
      components were located in the Dry Lab in an equipment rack on the after bulkhead.  After operations began we learned
      that the sled's pressure sensor was not working.
      
      Name & address of person collecting data:
      John Rooney
      NOAA IRC
      NMFS/PIFSC/CRED
      1845 WASP Blvd., Building 176
      Honolulu, HI 96818
      
      Data Files: Video data were recorded on two video tape recorders.  The position of the camera sled was recorded using
      Guildline MiniBat In-Tow data acquisition software.
      
      File naming convention: Each tow is given a name consisting of a 3-letter designator for the island area followed by
      a two-digit year and three-digit tow number.  For example, during HI0401 the first tow was called FFS04001.  Video
      tape labels, the navigation files (*.glo) and paper log forms are all annotated with the tow name.  If the navigation
      file is edited during processing the file name has a suffix a added.  For example, one of the navigation data files
      is named LIS04001a.glo.  Metadata were extracted from the navigation data and recorded to a file with the same name
      as the navigation file except that a file type of .met was appended; for example, LIS04001a.glo.met
      
      Time Correlation: All times are based on UTC.  Two clocks were set manually synchronized prior to starting data
      collection; the clock in the video character generator that was used to annotate the video tape and the TOAD data
      acquisition computer clock was used to annotate the navigation (*.glo) files.  These clocks were set to UTC at the
      beginning of each evening's operations and then compared to one another prior to (and during) each tow.  There were
      problems maintaining synchronization of the TOAD computer clock during this cruise.  See the problems section for a
      description. (Problems with data could be described here.)
      
      Resource Description: Digital video images that are geo-referenced to navigation files.
  Time_Period_of_Content: 
    Time_Period_Information: 
      Range_of_Dates/Times: 
        Beginning_Date: 20041010
        Ending_Date: 20041011
    Currentness_Reference: ground condition
  Status: 
    Progress: Complete
    Maintenance_and_Update_Frequency: As needed
  Spatial_Domain: 
    Bounding_Coordinates: 
      West_Bounding_Coordinate: -174.15544
      East_Bounding_Coordinate: -173.75664
      North_Bounding_Coordinate: 26.188
      South_Bounding_Coordinate: 25.92117
  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 - Northwestern and Main Hawaiian Islands
      Theme_Keyword: 1217
    Theme: 
      Theme_Keyword_Thesaurus: CoRIS Theme Thesaurus
      Theme_Keyword: EARTH SCIENCE > Biosphere > Aquatic Habitat > Benthic Habitat
      Theme_Keyword: EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Photographic Analysis > Videography
      Theme_Keyword: EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Mapping
    Theme: 
      Theme_Keyword_Thesaurus: None
      Theme_Keyword: Tethered Optical Assessment Device (TOAD)
      Theme_Keyword: Underwater video
      Theme_Keyword: HI0401
    Theme: 
      Theme_Keyword_Thesaurus: CoRIS Discovery Thesaurus
      Theme_Keyword: Visual Images > Habitats
    Theme: 
      Theme_Keyword_Thesaurus: ISO 19115 Topic Category
      Theme_Keyword: environment
      Theme_Keyword: biota
    Place: 
      Place_Keyword_Thesaurus: CoRIS Place Thesaurus
      Place_Keyword: OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Northwestern Hawaiian Islands > Lisianski Island (25N173W0001)
      Place_Keyword: COUNTRY/TERRITORY > United States of America > Hawaii > Honolulu > Lisianski Island (25N173W0001)
    Place: 
      Place_Keyword_Thesaurus: None
      Place_Keyword: Northwestern Hawaiian Islands
    Place: 
      Place_Keyword_Thesaurus: CoRIS Region
      Place_Keyword: NWHI
  Access_Constraints: None
  Use_Constraints: Please acknowledge the NOAA Coral Reef Ecosystem Division, Pacific Islands Fisheries Science Center as
    the source 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
  Data_Set_Credit: Benthic Habitat Mapping Group, Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science
    Center (PIFSC), NOAA
  Security_Information: 
    Security_Classification_System: Not applicable
    Security_Classification: Unclassified
    Security_Handling_Description: Not applicable
Data_Quality_Information: 
  Logical_Consistency_Report: Unspecified
  Completeness_Report: Complete
  Positional_Accuracy: 
    Horizontal_Positional_Accuracy: 
      Horizontal_Positional_Accuracy_Report: The horizontal position accuracy for the camera sled position is 100 meters.
        There are three primary sources of this error.  The ship's positioning is based on GPS SPS, often called
        standalone or non-differential GPS positioning.  SPS has a measured accuracy of under 5 meters.  The position of
        the GPS antenna is used; no attempt is made to translocate this position to that of the tow block from which the
        camera is deployed.  The difference between the tow block and the antenna is about 14 meters.  The camera sled
        position is based a layback calculation that use ship's course, the amount of cable out and the camera sled depth
        to develop an estimate of the camera sled position. The amount of cable deployed is manually entered by the
        operator during a given camera tow.
  Lineage: 
    Process_Step: 
      Process_Description: After a tow was completed the video tape data was reviewed by spot-checking the master and
        backup tape to verify that data were recorded.  Navigation data were copied from the acquisition computer to the
        data archive.  A metadata extractor (gloFilter.py, version 3/06) was run to summarize the navigation data and
        test for errors.  If errors were detected they were corrected or flagged as appropriate and a new data file was
        made.  This file's header was updated to document what type of processing occurred.  A metadata file was recorded
        in the data archive in the same location as the navigation data.  Processed navigation data were then read into
        ArcView 3.2 shapefiles using an ArcView Avenue script named TOAD.Import.Playback, version 9/25/01, written by
        Ronald Hoeke.
      Process_Date: 20060320
Spatial_Reference_Information: 
  Horizontal_Coordinate_System_Definition: 
    Geographic: 
      Latitude_Resolution: 0.0001
      Longitude_Resolution: 0.0001
      Geographic_Coordinate_Units: Decimal Degrees
    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: No correction
      Depth_Resolution: 0.1
      Depth_Distance_Units: meters
      Depth_Encoding_Method: Attribute Values
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: Offline 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: ASCII
        Format_Information_Content: Each comma-delimited record contains year, day of year, time, latitude, longitude,
          velocity north and east, water column depth, vehicle depth, layback, and wing angle.  For this data set the fields for vehicle depth and wing angle do not contain useful data.
          List of navigation files:
          LIS04001a.glo
          LIS04002a.glo
          LIS04003.glo
          LIS04004a.glo
          LIS04005a.glo
          LIS04006a.glo
          LIS04007a.glo
          LIS04008.glo
          LIS04009.glo
          LIS04010a.glo
          LIS04011.glo
          LIS04012.glo
          LIS04013.glo
      Digital_Transfer_Option: 
        Offline_Option: 
          Offline_Media: CD-ROM
          Recording_Format: ISO 9660
    Digital_Form: 
      Digital_Transfer_Information: 
        Format_Name: mini digital video
        Format_Information_Content: List of Video Tapes:
          LIS04001-002, Mini DV, Master
          LIS04003-004, Mini DV, Master
          LIS04005-006, Mini DV, Master
          LIS04007-008, Mini DV, Master
          LIS04009-010, Mini DV, Master
          LIS04011-012, Mini DV, Master
          LIS04013, Mini DV, Master
          LIS04001-002, Mini DV, Backup
          LIS04003-004, Mini DV, Backup
          LIS04005-006, Mini DV, Backup
          LIS04007-008, Mini DV, Backup
          LIS04009-010, Mini DV, Backup
          LIS04011-012, Mini DV, Backup
          LIS04013, Mini DV, Backup
      Digital_Transfer_Option: 
        Offline_Option: 
          Offline_Media: Video cassette tape
          Recording_Format: Mini DV
    Fees: None
Metadata_Reference_Information: 
  Metadata_Date: 20200329
  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 Standard for Digital Geospatial Metadata
  Metadata_Standard_Version: FGDC-STD-001-1998
CoRIS: 
  CoRIS_ID: 20080502065058
  CoRIS_Children: None
  CoRIS_Beginning_Date: 20041010
  CoRIS_Ending_Date: 20041011
  CoRIS_Metadata_Link: https://www.coris.noaa.gov/metadata/records/html/cred_toad_lisianski_hi0401_2004.html
  CoRIS_Tracking_ID: 109