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)
20100601
CRED Optical Validation Data in the Auau Channel, Hawaii, 2009 to Support Benthic Habitat Mapping
Video imagery, track line navigation files, and log sheets
http://www.soest.hawaii.edu/pibhmc/
http://www.soest.hawaii.edu/pibhmc/pibhmc_mhi_mai_optical.htm
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 Main Hawaiian Islands, in the Auau Channel, Maui
to support Benthic Habitat Mapping efforts during NOAA Ship Hi'ialakai cruise HA0905.
These data provide optical observations that will be used to provide information on the location and distribution
of mesophotic corals and associated fish communities between 50 and 150 m depths. Refer to supplemental information for description of instrument and survey.
The Auau Channel, located between the islands of Maui and Lanai and also protected by Molokai
to the north, and Kahoolawe to the south, is bounded by the latitudes 20.983 and 20.733 and the longitudes 156.633
and 156.858. Topography of the channel consists of solution basins and rims (ridges), sediment plains and reef
pinnacles on the channel floor, which were subaerially exposed during late Quaternary lowstands of sea level.
Holocene reef growth occurs as a thin veneer on topographic highs in the Channel. The Channel reaches depths of
140 m, however, the majority of the seafloor is between 55 m and 70 m deep. The Auau Channel has been documented to
include abundant coral reefs at these depths, which are also known as mesophotic coral ecosystems.
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 and to gather addictional information regarding benthic and fish communities.
Camera sled deployments were conducted at night, usually between 1800 and 600. The duration of each tow varied, but averaged
about 1 hour of bottom time at a given location. 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 a winch holding 360 m of cable and operated from a control station in the dry lab of the ship. The operator monitored a live
video feed from the camera and began recording data on two video tape recorders. 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 sled body used for the data collection was constructed from a shortened Phantom ROV body
with a tail piece added for stability. The frame has been extensively modified from its original configuration and was
equipped with two Deep Sea Power and Light Multi SeaCam 2060 color video cameras. One camera was mounted to point at
approximately a 45 degree angle toward the seafloor and was the primary data collection instrument. The second camera was
aimed straight ahead and the signal from this camera was fed to a second video monitor to provide warning of underwater
obstructions and for the survey of fish communites. The video signals from the sled were sent via coaxial conductors within
a 315 m long and 19 mm diameter umbilical cable to a topside control unit. The cable between the sled and the surface
included an internal strength member to support the sled frame. The cable was paid out and recovered using a dedicated
custom-built winch equipped with slip rings and powered by a 5 hp electric motor. The winch was controlled at the winch
itself for sled deployments and recoveries. The rest of the time a remote controller located in the dry lab was used to
enable the operator at the video console to adjust the sleds altitude. All TOAD surface components were located in the Dry
Lab in an equipment rack on the after bulkhead. Illumination was provided by two 250 W DeepSea Power & Light Multi-SeaLite
model 1050 underwater lights mounted on the sled frame. The lights were located on each side of the sled to provide the maximum
possible horizontal distance from the camera. The sled was also equipped with a sonar altimeter to detect the height of the
camera above the seafloor, a pair of parallel lasers to determine the size/scale of viewed objects, a compass to determine
the sled heading and orientation, and a depth (pressure) sensor. Neither the altimeter nor the pressure transducer functioned
reliably during this cruise. A Tcount cable counter recorded cable out values to locate the position of the camera sled from the ship.
Name & address of person collecting data:
John Rooney
NOAA PIFSC
1125B Ala Moana Blvd
Honolulu, HI 98614
Data Files: Video data were recorded on two MiniDV tape recorders. The position of the camera sled was recorded
using Hypack Max version 02.012a survey software.
File naming convention: Each tow is given a name consisting of a 3-letter designator for the island area followed by
a tow number. During HA0905 the consecutive numbers started at MAI09000. Video tape labels and paper log forms are
annotated with the tow name. Data files recorded in Hypack software followed their CHS filename format consisting of
the year, the Julian date, and the hour and minute in which the file was started. For example, a file collected on
July 26, 2009 (Julian date 207) starting at time 1055 would be 2009_2071055.
Time Correlation: All times are based on UTC. All clocks were manually synchronized prior to starting data
collection; the clock in the video character generator that was used to annotate the video tape, the clock in the
On Screen Display system, clocks in both MiniDV tape recorders, and in the computer
running the Hypack Max software. These clocks were set to UTC at the beginning of each evening's operations.
Resource Description: Digital video imagery that is geo-referenced to navigation files.
20090724
20090802
ground condition
None planned
-156.8243
-156.6797
20.9371
20.7766
None
Benthic Habitat
Underwater video
ISO 19115 Topic Category
imageryBaseMapsEarthCover
010
CoRIS Discovery Thesaurus
Geographic Information > Habitats
CoRIS Theme Thesaurus
EARTH SCIENCE > Biosphere > Aquatic Habitat > Benthic Habitat
EARTH SCIENCE > Biosphere > Zoology > Corals > Reef monitoring and assessment > Mapping
None
Auau Channel
Hawaiian Islands
Hawaii
CoRIS Place Thesaurus
OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Hawaiian Islands > Auau Channel > AuAu Channel (20N156W0027)
COUNTRY/TERRITORY > United States of America > Hawaii > Auau Channel > AuAu Channel (20N156W0027)
CoRIS Region
MHI
None
Please acknowledge the NOAA Coral Reef Ecosystem Division, Pacific Islands Fisheries Science Center as the source of this information.
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)
John Rooney
mailing and physical address
1125B Ala Moana Blvd.
Honolulu
HI
96814
(808) 983-3776
(808) 983-2902
pibhmc@soest.hawaii.edu
e-mail preferred
Pacific Island Benthic Habitat Mapping Center, Coral Reef Ecosystem Division
(CRED), Pacific Islands Fisheries Science Center (PIFSC), NOAA
Not applicable
Unclassified
Not applicable
Unspecified
Complete
The horizontal position accuracy for the camera sled position is estimated at plus or minus 80
meters. There are two 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 referenced to
the ship's granite block. The second and larger primary source of error is uncertainty associated with the sled's position as reported
by the Tcount cable counter.
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. Raw data files recorded using Hypack Max software include time, horizontal position, and
ship's heading information were copied from the acquisition computer to the data archive. Tow-specific metadata
were recorded in the data archive in the same location as the raw data, in a spreadsheet that was then referred
to in creating metadata records of each island where data were collected during the cruise. Raw data files were
exported as comma-delimited text files which were then imported into ArcGIS v9.3 and saved as shapefiles.
Spreadsheets containing location and time data were then used to classify benthic habitat for each tow using the Pacific Coral Reef
Ecosystem Benthic Habitat Mapping classification scheme. Five points were classified at 30 second intervals and codes were inputted
into spreadsheet. Spreadsheet was saved as dbase file, imported into ArcGIS v9.3, and saved as a shapefile. Percent scleractinian
coral was column symbolized in Optical Validation maps with underlying fields of different substrates contained within the attribute
table of the shapefile.
20090802
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)
John Rooney
mailing and physical address
1125B Ala Moana Blvd.
Honolulu
HI
96814
(808) 983-3776
(808) 983-2902
pibhmc@soest.hawaii.edu
e-mail preferred
Offline Data
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.
ASCII
Each comma-delimited record contains information on the UTC date and time, horizontal position of the
sled, and heading of the ship over the period of time that the camera sled is in the water.
List of navigation files:
000_0557
2009_2070920
2009_2070948
2009_2071055
2009_2080504
2009_2080513
2009_2080820
2009_2081035
2009_2081039
2009_2081322
2009_2090851
2009_2091208
2009_2100541
2009_2100925
2009_2101155
2009_2110443
2009_2110818
2009_2111158
2009_2120338
2009_2120548
2009_2120747
2009_2120946
2009_2121147
2009_2121339
2009_2130355
2009_2130450
2009_2130919
2009_2131111
2009_2131309
2009_2140328
CD-ROM
ISO 9660
mini DV digital video cassette and DVD
18h 30m of video data are available covering 40.8 km of seabed.
These data were recorded on 49 video tapes
List of video tapes:
MAI09000a, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI09000b, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI09001, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI09002a, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI09002b, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI09002c, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI09003a, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI09003b, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI09004, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI09005a, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI09005b, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI09005c, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI09006a, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI09006b, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI09007a, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI09007b, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI09008a, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI09008b, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI09009a, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI09009b, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI09010a, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI09010b, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI09010c, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI09011a, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI09011b, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI09011c, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI09012a, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI09012b, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI09012c, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI09013, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI09014, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI09015, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI09016, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI09017, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI09018, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI09019, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI09020, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI09021a, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI09021b, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI09021c, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI09021d, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI09022a, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI09022b, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI09023, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI09024a, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI09024b, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI09025a, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI09025b, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI09025c, forward and downward tapes, Mini DV (Master) and DVD (Backup)
Video cassette tape
Mini DV
None
20121220
20101019
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)
CRED Data Management Team
mailing and physical address
1125B Ala Moana Blvd.
Honolulu
HI
96814
(808) 983-3776
(808) 983-2902
pibhmc@soest.hawaii.edu
e-mail preferred
FGDC Content Standards for Digital Geospatial Metadata
FGDC-STD-001-1998
Local Time
None
None
20101019071814
None
20090724
20090802
http://www.coris.noaa.gov/metadata/records/html/cred_toad_maui_ha0905_2009.html
6008