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)
20121215
CRED Optical Validation Data at the island of Ofu and Olosega in American Samoa, 2012 to support Benthic Habitat Mapping (TOAD)
Photo and video imagery, track line navigation files, and log sheets
http://www.soest.hawaii.edu/pibhmc/pibhmc_amsamoa_ofu_optical.htm
http://www.soest.hawaii.edu/pibhmc/
Optical validation data were collected using the Tethered Optical Assessment Device (TOAD), a sled equipped with
underwater video camera, still camera and lights. Camera sled deployments were conducted during the day, from the contracted vessel
Bonavista II. Data were collected in American Samoa, around the islands of Ofu and Olosega to support Benthic Habitat Mapping efforts
from November 2-12, 2012.
These data provide optical observations that will be correlated with bathymetry and acoustic backscatter
imagery to develop a benthic habitat map of Ofu and Olosega. Refer to supplemental information for description of
instrument and survey.
Ofu and Olosega Islands are part of the Manu'a Island group in American Samoa, situated
approximately 100 km northeast of Tutuila and 20km west of Ta'u. Centered at 14.17 degress S, 169.65 degrees W, the twin islands
have very little human settlement. Ofu and Olosega are steep, volcanic high islands that lie only 75 m apart and
are connected by a bridge and road built across the shallow reef flat. Shallow multibeam mapping was conducted in
2004 and revealed approximately 60 km2 of previously uncharted bank top (less than 300 m) that extends 0.2 to 2 km
from shore and then drops abruptly to oceanic depths. An underwater portion of the National Park of American Samoa,
which has exceptionally prolific coral growth, is located on the south shore of Ofu Island.
Optical validation data were collected using the Tethered Optical Assessment Device (TOAD), a sled equipped with
underwater video and still 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 during the day. The duration of each
tow varied but averaged about 20 minutes of bottom time at a given location. The camera sled was deployed from a
pot-hauler, mounted on the starboard aft of the vessel. The camera sled was lowered slowly to the seafloor by paying out
cable, and once close to the seafloor, an altitude of 1-2 m was maintained by making adjustments on the length of cable
out, using a remote pot-hauler switch, which allowed the operator to monitor a live video feed of the seafloor during
operations. A second operator monitored the live video feed, and recorded real-time scientific observations, as well as
any comments upon the operation, on a paper logsheet.
Equipment Description: The TOAD sled consisted of a modified Phantom ROV body with a tail piece added for stability.
It was equipped with a Deep Sea Power and Light Multi SeaCam 2060 color video camera, oriented approximately 45 degrees
to the seafloor to provide a view of the seafloor as well as some view of upcoming obstacles. The sled was also fitted
with a downward facing digital still camera (Ocean Imaging System DSC12000, consisting of Nikon D90 dSLR with Nikkor
20mm F/2.8 lens), and two 50 W DeepSea Power and Light LED lights (one to illuminate the video and one the still camera).
Scaling of the digital still photographs was provided by a pair of Deep Sea Power and Light SeaLaster 100 parallel lasers,
mounted 10 cm apart. The sled was also fitted with a Tritech PA200 altimeter, and an electronics bottle containing a compass,
and depth sensor. Power to the sled, and video and data feed from the sled was conducted via a 16mm, 150 m long coaxial
cable, connected to a topside control unit. An on-screen display unit was used to overlay time, date, depth and altitude onto the video footage.
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 to miniDV tapes, and then backed up to DVD. Still images were saved to the camera's SD card
and then backed up to external hard drive. Hypack 2012 hydrographic software was used to record time, vessel GPS position,
camera sled altitude and depth, and length of cable out (entered manually). During deployments instantaneous layback
calculations were performed by Hypack, using these data, and including the measured xyz offset between the vessel
GPS antenna and the pot-hauler.
File naming convention: Each tow is given a name consisting of a three-letter designator for the island area,
followed by a two-digit year and a three-digit tow number, which increments by one for each new tow around that
island. For example, during SB1216 (the 16th cruise in the calendar year 2012) the first tow was called OFU12001.
For subsequent cruises in the same year, the tow numbers will increment by
100, so the first tow on the next cruise to Ofu in 2012 will be tow number OFU12100. Video tape labels and paper
log forms are also annotated with the tow name; if more than one tape is required for a tow, consecutive letters
are added to the end of the tow number (OFU01200a, OFU12100b, OFU12100c...). Navigation files generated by Hypack
Max follow the Hypack 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, followed by the extension .raw. For example, a
file begun at 1935 on Dec. 10, 2004 (Julian date 345) aboard the Carolinian would be 2004CA3451935.raw.
Time Correlation: All clocks were synchronized to UTC at the beginning of each day's operations. Two clocks were
manually synchronized to GPS-derived times: the acquisition computer clock and the internal clock of the OSD-79
on-screen display unit.
Resource Description: Digital video and still imagery that is geo-referenced to navigation files.
20121102
20121112
ground condition
None planned
-169.705274
-169.583687
-14.133505
-14.203385
NCEI Geoportal FilterCoRIS_Metadata
CRCP Project
Benthic Habitat Mapping and Characterization in the Pacific Islands Region
467
CoRIS Theme Thesaurus
EARTH SCIENCE > Biosphere > Aquatic Habitat > Benthic Habitat
EARTH SCIENCE > Biosphere > Zoology > Corals > Reef monitoring and assessment > Photographic analysis > Videography
EARTH SCIENCE > Biosphere > Zoology > Corals > Reef monitoring and assessment > Mapping
None
Tethered Optical Assessment Device (TOAD)
Underwater video
SB1216
CoRIS Discovery Thesaurus
Visual Images > Habitats
ISO 19115 Topic Category
environment
007
biota
002
CoRIS Place Thesaurus
OCEAN BASIN > Pacific Ocean > Manu'a Group > Ofu Island (14S169W0013)
OCEAN BASIN > Pacific Ocean > Manu'a Group > Olosega Island (14S169W0014)
COUNTRY/TERRITORY > United States of America > American Samoa > American Samoa > Ofu Island (14S169W0013)
COUNTRY/TERRITORY > United States of America > American Samoa > American Samoa > Olosega Island (14S169W0014)
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)
mailing and physical
NOAA IRC
NMFS/PIFSC/CRED
1845 WASP Blvd., Building 176
Honolulu
HI
96818
USA
808 725-5360
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
Hypack 2012 includes a window for manual entry of the length of camera sled
cable paid out, a utility to enter horizontal and vertical offsets between the GPS antenna and sheave over which
the camera sled cable passes, and a built-in caternary function. Using these data, Hypack 2012 automatically
estimates the camera sled's position. Analysis of tow data indicate that horizontal positional uncertainty associated
with the location of the camera sled recorded in Hypack is plus or minus 13 m.
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 include time, horizontal position, depth information and altitude, and were copied from the acquisition
computer to the data archive. During this cruise it was possible to export sled altitude from Hypack. 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 from Hypack as comma-delimited text files, and
following additional processing were imported into a custom Access Database for imagery classification. The benthic habitat for each
tow was classified using the PIBHMC_tow classification scheme. Five points were classified at 30 second intervals along the video and
codes were inputted directly into the TOAD database. The classified results were then imported into ArcGIS v10.1, and then saved as a
shapefile. Percent scleractinian coral was color-symbolized in optical validation maps. Additional attributes include metadata for
each point, and the full results of the benthic classification. For more information on classificiation methods, refer to the
PIBHMC website: ftp://ftp.soest.hawaii.edu/pibhmc/website/webdocs/documentation/Optical-Proc-Overview.pdf
For more information on the classification scheme,refer to the PIBHMC website:
ftp://ftp.soest.hawaii.edu/pibhmc/website/webdocs/documentation/Benth-Habitat-Class-Codes.htm
20121109
none
none
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)
mailing and physical
NOAA IRC
NMFS/PIFSC/CRED
1845 WASP Blvd., Building 176
Honolulu
HI
96818
USA
808 725-5360
nmfs.pic.credinfo@noaa.gov
e-mail preferred
Downloadable 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 the UTC date and time, latitude, longitude,
altitude, vehicle depth, and water depth.
List of navigation files:
The shapefiles showing camera sled tracks listed below consist of a collection of files,
followed by these extensions: .dbf, .shp, .shx, and .prj. All file types are necessary to properly
displaying the source data.
OFU12001-065 (65 files)
ftp://ftp.soest.hawaii.edu/pibhmc/website/data/amsamoa/optical/ofu/ofu_toad_sb1216.zip
ftp://ftp.soest.hawaii.edu/pibhmc/website/data/amsamoa/optical/ofu/OFU_TOAD_ALL2_445.jpg
CD-ROM
ISO 9660
AVI
http://www.soest.hawaii.edu/pibhmc/pibhmc_amsamoa_optical_data.html
None
Data is available in mini Digital Video format. Contact distributor.
These data were recorded on 66 video tapes
List of video tapes:
Video Names
OFU12001, Mini DV, Master and Backup
OFU12002, Mini DV, Master and Backup
OFU12003_A + B, Mini DV, Master and Backup
OFU12004_F, Mini DV, Master and Backup
OFU12005, Mini DV, Master and Backup
OFU12006, Mini DV, Master and Backup
OFU12007, Mini DV, Master and Backup
OFU12008, Mini DV, Master and Backup
OFU12009_F, Mini DV, Master and Backup
OFU12010, Mini DV, Master and Backup
OFU12011_F, Mini DV, Master and Backup
OFU12012, Mini DV, Master and Backup
OFU12013_F, Mini DV, Master and Backup
OFU12014, Mini DV, Master and Backup
OFU12015, Mini DV, Master and Backup
OFU12016, Mini DV, Master and Backup
OFU12017, Mini DV, Master and Backup
OFU12018, Mini DV, Master and Backup
OFU12019, Mini DV, Master and Backup
OFU12020, Mini DV, Master and Backup
OFU12021, Mini DV, Master and Backup
OFU12022, Mini DV, Master and Backup
OFU12023, Mini DV, Master and Backup
OFU12024, Mini DV, Master and Backup
OFU12025, Mini DV, Master and Backup
OFU12026, Mini DV, Master and Backup
OFU12027, Mini DV, Master and Backup
OFU12028, Mini DV, Master and Backup
OFU12029, Mini DV, Master and Backup
OFU12030, Mini DV, Master and Backup
OFU12031, Mini DV, Master and Backup
OFU12032, Mini DV, Master and Backup
OFU12033, Mini DV, Master and Backup
OFU12034, Mini DV, Master and Backup
OFU12035, Mini DV, Master and Backup
OFU12036, Mini DV, Master and Backup
OFU12037, Mini DV, Master and Backup
OFU12038, Mini DV, Master and Backup
OFU12039, Mini DV, Master and Backup
OFU12040, Mini DV, Master and Backup
OFU12041, Mini DV, Master and Backup
OFU12042, Mini DV, Master and Backup
OFU12043, Mini DV, Master and Backup
OFU12044, Mini DV, Master and Backup
OFU12045, Mini DV, Master and Backup
OFU12046, Mini DV, Master and Backup
OFU12047, Mini DV, Master and Backup
OFU12048, Mini DV, Master and Backup
OFU12049, Mini DV, Master and Backup
OFU12050, Mini DV, Master and Backup
OFU12051, Mini DV, Master and Backup
OFU12052, Mini DV, Master and Backup
OFU12053, Mini DV, Master and Backup
OFU12054, Mini DV, Master and Backup
OFU12055, Mini DV, Master and Backup
OFU12056, Mini DV, Master and Backup
OFU12057, Mini DV, Master and Backup
OFU12058, Mini DV, Master and Backup
OFU12059, Mini DV, Master and Backup
OFU12060, Mini DV, Master and Backup
OFU12061, Mini DV, Master and Backup
OFU12062, Mini DV, Master and Backup
OFU12063, Mini DV, Master and Backup
OFU12064, Mini DV, Master and Backup
OFU12065, Mini DV, Master and Backup
None
20200329
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)
mailing and physical
NOAA IRC
NMFS/PIFSC/CRED
1845 WASP Blvd., Building 176
Honolulu
HI
96818
USA
808 725-5360
nmfs.pic.credinfo@noaa.gov
e-mail preferred
FGDC Content Standards for Digital Geospatial Metadata
FGDC-STD-001-1998
local time
None
None
https://www.coris.noaa.gov/metadata/records/html/cred_toad_ofu_sb1216_2012.html
6960