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)
20100801
CRED Optical Validation Data in the Auau Channel, Hawaii, 2008 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/cms/data-by-location/main-hawaiian-islands/maui/optical/
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 Oscar Elton Sette cruise SE0807.
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 Molokaito 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
reefpinnacles 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 toinclude 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 withunderwater video
camera and lights. These data are used to provide optical information for benthic
habitat maps based on multibeam echosounder surveys and to gather additional information
regarding benthic and fish communities. Camera sled deployments were conducted at
night and during the day. The camera sled was deployed off the starboard J-frame aboard
NOAA ship Oscar Elton Sette. 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. 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 operator monitored a live video feed from the camera and recorded data on a
video tape recorder. 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. Â 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.These values were
unreliable and therefore the ships position and a standard layback were used to
determine camera sled position.
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 MiniDV tape recorders.The position
of the camera sled was recorded using Hypack Max survey software.
File naming convention: Each tow is given a name consisting of a 3-letter
designator for the island area followed by two-digit year and three-digit
tow number. For example, during SE0807 (NOAA Ship Oscar Elton Sette's 7th
cruise in calendar year 2008)
the first tow was called MAI08001. Video tape labels and paper log forms are annotated
with the tow name. Â Data files recorded in Hypack software followed their CHS filename
format consisting of the year, the first two letters of the platform name, the Julian date,
and the hour and minute in which the file was started. For example, a file collected on
August 3, 2008 (Julian date 217) aboard the Oscar Elton Sette starting at time 1845 would
be 2008SE2171845. Time Correlation: All times are based on UTC. Â Three clocks were manually
synchronized prior to starting data collection; the clock in the on screen display that was
used to annotate the video tape, in one of the video cassette recorders, and in the computer
running the Hypack Max software. These clocks are set to UTC at the beginning of each operation.
Resource Description: Digital video imagery that is geo-referenced to navigation files.
20080803
20080807
ground condition
None planned
-156.8243
-156.6797
20.9371
20.7766
NCEI Geoportal FilterCoRIS_Metadata
CRCP Project
Benthic Habitat Mapping and Characterization - Northwestern and Main Hawaiian Islands
1217
CoRIS Theme Thesaurus
EARTH SCIENCE > Biosphere > Aquatic Habitat > Benthic Habitat
EARTH SCIENCE > Biosphere > Zoology > Corals > Reef monitoring and assessment > Mapping
CoRIS Discovery Thesaurus
Geographic Information > Habitats
ISO 19115 Topic Category
imageryBaseMapsEarthCover
010
None
Synthesis Map
Mesophotic coral ecosystem
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
These data are not to be used for navigation purposes.
Please acknowledge the NOAA Pacific Islands Fisheries Science Center
(PIFSC) Coral Reef Ecosystem Division (CRED) and the Pacific Islands
Benthic Habitat Mapping Center, and the Joint Institute for Marine
and Atmospheric Research (JIMAR) and School of Ocean and Earth
Science and Technology (SOEST), University of Hawaii as the sources
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
NOAA IRC
NMFS/PIFSC/CRED
1845 WASP Blvd., Building 176
Honolulu
HI
96818
808 725-5360
808 725-5429
nmfs.pic.credinfo@noaa.gov
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 100Â 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. Â SPS has a measured
accuracy of under 5 meters. Â The position of the GPS antenna is referenced to the
ship's granite block. The second and larger primary source of error is the
uncertainty associated with the sled's position as determined by using a complex
algorithm with inputs as the ships position, a predetermined average layback
value, and depth determined from multibeam bathymetry to calculate an offset
from the ship for every position.
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.
20080807
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
NOAA IRC
NMFS/PIFSC/CRED
1845 WASP Blvd., Building 176
Honolulu
HI
96818
808 725-5360
808 725-5429
nmfs.pic.credinfo@noaa.gov
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:
2008SE2161845.RAW
2008SE2170007.RAW
2008SE2170020.RAW
2008SE2170618.RAW
2008SE2170656.RAW
2008SE2170656A.RAW
2008SE2170659.RAW
2008SE2170903.RAW
2008SE2171145.RAW
2008SE2171345.RAW
2008SE2171901.RAW
2008SE2172100.RAW
2008SE2172312.RAW
2008SE2180019.RAW
2008SE2180150.RAW
2008SE2180751.RAW
2008SE2181135.RAW
2008SE2181228.RAW
2008SE2181346.RAW
2008SE2181831.RAW
2008SE2181940.RAW
2008SE2182045.RAW
2008SE2182245.RAW
2008SE2182345.RAW
2008SE2190000.RAW
2008SE2190212.RAW
2008SE2190638.RAW
2008SE2200039.RAW
2008SE2200201.RAW
2008SE2200640.RAW
2008SE2200811.RAW
2008SE2200914.RAW
2008SE2201845.RAW
2008SE2202108.RAW
2008SE2202222.RAW
CD-ROM
ISO 9660
mini DV digital video cassette and DVD
28h 02m of video data are available covering 25.7 km of seabed.
These data were recorded on 38 video tapes. Â Â Â Â Â Â Â Â Â
List of video tapes:
MAI08001a, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI08001b, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI08001c, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI08002a, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI08002b, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI08002c, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI08003a, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI08003b, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI08004, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI08005, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI08006, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI08007a, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI08007b, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI08008, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI08009, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI08010, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI08011, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI08012a, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI08012b, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI08013, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI08014, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI08015, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI08016, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI08017, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI08018, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI08019, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI08020a, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI08020b, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI08021, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI08022, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI08023, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI08024, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI08025, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI08026, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI08027, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI08028, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI08029, forward and downward tapes, Mini DV (Master) and DVD (Backup)
MAI08030, forward and downward tapes, Mini DV (Master) and DVD (Backup)
Video cassette tape
Mini DV
None
20190605
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
NOAA IRC
NMFS/PIFSC/CRED
1845 WASP Blvd., Building 176
Honolulu
HI
96818
808 725-5360
808 725-5429
nmfs.pic.credinfo@noaa.gov
e-mail preferred
FGDC Content Standards for Digital Geospatial Metadata
FGDC-STD-001-1998
Local Time
None
None
20101019071941
None
20080803
20080807
https://www.coris.noaa.gov/metadata/records/html/cred_toad_maui_se0807_2008.html
6009