Identification_Information: 
  Citation: 
    Citation_Information: 
      Originator: NOAA Pacific Islands Fisheries Science Center, Coral Reef Ecosystem Division, Pacific Islands Benthic Habitat Mapping Center
      Publication_Date: 200512
      Title: CRED Optical Validation Data at Eleven-Mile Bank in the U.S. Territory of Guam, 2003, 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 in the U.S. territory of Guam, around
      the island of Guam itself and 3 banks within the territory, to support Benthic Habitat Mapping efforts during NOAA
      Ship Oscar Elton Sette cruise OES0308, from September 22-28, 2003.
    Purpose: These data provide optical observations that will be correlated with bathymetry and acoustic backscatter
      imagery to develop a benthic habitat map of Eleven-Mile Bank. Refer to supplemental information for description of instrument
      and survey.
    Supplemental_Information: Eleven-Mile Bank is part of the U.S. territory of Guam and located about 9 nautical miles (17 km) south of the
      southern end of the island of Guam. The surface of this predominantly cone-shaped bank is characterized by rough
      terrain, at least at depths shallower than 100 m. As implied by its name, the charted depth of the peak of the bank
      is 11 fathoms (20 m). This bank has some coral and, despite its proximity to the island of Guam, many reef fish.
      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 for benthic habitat maps
      based on multibeam echosounder surveys. Camera sled deployments were conducted at night, usually between 1800 and
      midnight. The duration of each tow varied but averaged about 40 minutes of bottom time at a given location. The camera
      sled was deployed from the port J-frame mounted amidships on the NOAA Ship Oscar Elton Sette. At each station the
      ship was positioned with the wind on the port 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
      using a capstan.  The operator monitored a live video feed from the camera and began recording data on a video tape
      recorder.  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 port side 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 equipped with an ROS model 54-00100-13 color underwater video camera as the primary
      data collection instrument. The ROS camera was mounted to point at approximately a 45 degree angle toward the seafloor.
      A Deep Sea Power and Light model 2050 MultiSeaCam low-light color video camera was also mounted on the sled and aimed
      straight ahead. The signal from this camera was fed to a second video monitor to provide warning of underwater obstructions
      the sled might be headed for. Illumination was provided by two 500 W DeepSea Power & Light Multi-SeaLite model 1050
      underwater lights mounted on the original sled frame. The lights were located near the base and each side of the sled
      to provide the maximum possible horizontal distance from the ROS camera. Cable between the sled and the surface
      consisted of a underwater electrical cable (cable 2, black in color) with an internal kevlar strength member to
      support the sled frame.  The cable was led from the camera sled over a 22-inch diameter sheave hung from the J-frame,
      and from there around a gypsy head mounted on the alternate CTD winch, amidships on the vessel's port side. All TOAD
      surface components were located in the Dry Lab in an equipment rack on the after bulkhead.
      Name & address of person collecting data:
      John Rooney
      NOAA PIFSC
      1125B Ala Moana Blvd
      Honolulu, HI 98614
      Data Files: Video data were recorded on a video tape recorder.  The position of the camera sled was recorded in WGS-84
      using Guildline MiniBat In-Tow data acquisition software and a data feed from a shipboard Northstar Chartplotter.
      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, which increments by one for each new tow around that island.  For Eleven-Mile Bank the designator is
      "ELE."During OES0308 (NOAA Ship Oscar Elton Sette's 8th cruise in calendar year 2003) the consecutive numbers started
      at ELE03000. Video tape labels, the navigation files (*.glo) and paper log forms are annotated with the tow name and number,
      e.g., ELE03001. If the navigation file is edited during processing the file name has a suffix 'a' added.  For example,
      for a navigation data file named "ELE03001a.glo," the 'a' would indicate that 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, 'ELE03001a.glo.met.
      Time Correlation: All times are based on UTC.  Two clocks were manually synchronized prior to starting data collection;
      the clock in the video character generator that was used to annotate the video tape, and the clock in the TOAD data
      acquisition computer. These clocks were set to UTC at the beginning of each evening's operations.
  Time_Period_of_Content: 
    Time_Period_Information: 
      Single_Date/Time: 
        Calendar_Date: 20030924
    Currentness_Reference: ground condition
  Status: 
    Progress: Complete
    Maintenance_and_Update_Frequency: None planned
  Spatial_Domain: 
    Bounding_Coordinates: 
      West_Bounding_Coordinate: 144.44
      East_Bounding_Coordinate: 145.46
      North_Bounding_Coordinate: 13.24
      South_Bounding_Coordinate: 13.22
  Keywords: 
    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 > Mapping
      Theme_Keyword: EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Photographic Analysis > Videography
    Theme: 
      Theme_Keyword_Thesaurus: CoRIS Discovery Thesaurus
      Theme_Keyword: Visual Images > Habitats
    Theme: 
      Theme_Keyword_Thesaurus: None
      Theme_Keyword: Tethered Optical Assessment Device (TOAD)
      Theme_Keyword: Underwater video
      Theme_Keyword: OES0308
    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 > Western Pacific Ocean > Guam > Guam (13N144E0000)
      Place_Keyword: COUNTRY/TERRITORY > United States of America > Guam > Guam (13N144E0000)
      Place_Keyword: OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Mariana Archipelago > Northern Mariana Islands ( CNMI ) (18N146E0000)
      Place_Keyword: COUNTRY/TERRITORY > Northern Mariana Islands > Northern Mariana Islands > Northern Mariana Islands ( CNMI ) (18N146E0000)
    Place: 
      Place_Keyword_Thesaurus: None
      Place_Keyword: Eleven-Mile Bank
      Place_Keyword: U.S. Territory of Guam
  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, CRED, PIFSC, NOAA
        Contact_Person: John Rooney
      Contact_Address: 
        Address_Type: mailing and physical address
        Address: 1125B Ala Moana Blvd
        City: Honolulu
        State_or_Province: HI
        Postal_Code: 96814
        Country: USA
      Contact_Voice_Telephone: 808-956-9729
      Contact_Electronic_Mail_Address: john.rooney@noaa.gov
  Data_Set_Credit: Pacific Islands Benthic Habitat Mapping Center, Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), NOAA
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 estimated
        at plus or minus 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 largest
        source of error is uncertainty associated with the sled's position relative to the tow block.
  Lineage: 
    Process_Step: 
      Process_Description: After a tow was completed the video tape data and still photograpshs were reviewed by spot-checking to verify that
        data were recorded. Navigation data were copied from the acquisition computer to the data archive.  A metadata
        extractor (gloMeta.py, version 9/28/04) 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 Avenue
        script named `toadimport.playback.ave', version 9/25/01, written by Ronald Hoeke.
      Process_Date: 20051017
Distribution_Information: 
  Distributor: 
    Contact_Information: 
      Contact_Organization_Primary: 
        Contact_Organization: Pacific Islands Benthic Habitat Mapping Center, CRED, PIFSC, NOAA
        Contact_Person: John Rooney
      Contact_Position: Coastal Geomorphologist
      Contact_Address: 
        Address_Type: mailing and physical address
        Address: 1125 'B' Ala Moana Blvd
        City: Honolulu
        State_or_Province: Hawaii
        Postal_Code: 96814
        Country: USA
      Contact_Voice_Telephone: 808-956-9729
      Contact_Electronic_Mail_Address: john.rooney@noaa.gov
  Resource_Description: Digital video imagery that is geo-referenced to navigation files.
  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: Navigation information are recorded as successive lines in a comma-delimited ASCII text file, with a .glo extension. Each line of a GLO file includes the
          following data: the year, day of year, time, latitude, longitude, water column depth, vehicle depth, layback, and wing angle. The field for wing angle does not contain useful data.
          A total of 3 navigation files were collected, including:
          ele03000a.glo
          ele03001.glo
          ele03002.glo
      Digital_Transfer_Option: 
        Offline_Option: 
          Offline_Media: CD-ROM
          Recording_Format: ISO 9660
    Digital_Form: 
      Digital_Transfer_Information: 
        Format_Name: mini digital video cassette
        Format_Information_Content: These data were recorded on 2 video tapes, include 1 hour and 19 min of
          video data covering 2.1 linear km of seabed.
          List of video tapes:
          ELE03000-001, Mini DV, Master
          ELE03002, Mini DV, Master
          ELE03000-001, Mini DV, Backup
          ELE03002, Mini DV, Backup
      Digital_Transfer_Option: 
        Offline_Option: 
          Offline_Media: Video cassette tape
          Recording_Format: mini DV
    Fees: None
Metadata_Reference_Information: 
  Metadata_Date: 20080812
  Metadata_Contact: 
    Contact_Information: 
      Contact_Organization_Primary: 
        Contact_Organization: Pacific Islands Benthic Habitat Mapping Center, CRED, PIFSC, NOAA
        Contact_Person: Dr. Michael Parke
      Contact_Position: Research Biologist
      Contact_Address: 
        Address_Type: mailing and physical address
        Address: 1125 'B' Ala Moana Blvd
        City: Honolulu
        State_or_Province: Hawaii
        Postal_Code: 96814
        Country: USA
      Contact_Voice_Telephone: 808-592-7025
      Contact_Electronic_Mail_Address: michael.parke@noaa.gov
  Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata
  Metadata_Standard_Version: FGDC-STD-001-1998
CoRIS: 
  CoRIS_ID: 20080502061635
  CoRIS_Children: None
  CoRIS_Beginning_Date: 20030924
  CoRIS_Ending_Date: 20030924
  CoRIS_Metadata_Link: http://www.coris.noaa.gov/metadata/records/txt/cred_toad_eleven_mile_bank_guam_oes0308_2003.txt
  CoRIS_Tracking_ID: 1338