CRED Optical Validation Data at the island of Ofu and Olosega in American Samoa, 2012 to support Benthic Habitat Mapping (TOAD)

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Metadata:


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: 20121215
Title:
CRED Optical Validation Data at the island of Ofu and Olosega in American Samoa, 2012 to support Benthic Habitat Mapping (TOAD)
Geospatial_Data_Presentation_Form:
Photo and video imagery, track line navigation files, and log sheets
Online_Linkage:
<http://www.soest.hawaii.edu/pibhmc/pibhmc_amsamoa_ofu_optical.htm>
Online_Linkage: <http://www.soest.hawaii.edu/pibhmc/>
Description:
Abstract:
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.
Purpose:
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.
Supplemental_Information:
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.

Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20121102
Ending_Date: 20121112
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -169.705274
East_Bounding_Coordinate: -169.583687
North_Bounding_Coordinate: -14.133505
South_Bounding_Coordinate: -14.203385
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 > 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: SB1216
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: 007
Theme_Keyword: biota
Theme_Keyword: 002
Place:
Place_Keyword_Thesaurus: CoRIS Place Thesaurus
Place_Keyword:
OCEAN BASIN > Pacific Ocean > Manu'a Group > Ofu Island (14S169W0013)
Place_Keyword:
OCEAN BASIN > Pacific Ocean > Manu'a Group > Olosega Island (14S169W0014)
Place_Keyword:
COUNTRY/TERRITORY > United States of America > American Samoa > American Samoa > Ofu Island (14S169W0013)
Place_Keyword:
COUNTRY/TERRITORY > United States of America > American Samoa > American Samoa > Olosega Island (14S169W0014)
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_Address:
Address_Type: mailing and physical
Address: NOAA IRC
Address: NMFS/PIFSC/CRED
Address: 1845 WASP Blvd., Building 176
City: Honolulu
State_or_Province: HI
Postal_Code: 96818
Country: USA
Contact_Voice_Telephone: 808 725-5360
Contact_Electronic_Mail_Address: nmfs.pic.credinfo@noaa.gov
Contact_Instructions: e-mail preferred
Data_Set_Credit:
Pacific Island Benthic Habitat Mapping Center, 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:
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.
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. 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>
Process_Date: 20121109

Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview: none
Entity_and_Attribute_Detail_Citation: none

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_Address:
Address_Type: mailing and physical
Address: NOAA IRC
Address: NMFS/PIFSC/CRED
Address: 1845 WASP Blvd., Building 176
City: Honolulu
State_or_Province: HI
Postal_Code: 96818
Country: USA
Contact_Voice_Telephone: 808 725-5360
Contact_Electronic_Mail_Address: nmfs.pic.credinfo@noaa.gov
Contact_Instructions: e-mail preferred
Resource_Description: Downloadable 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 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)
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
<ftp://ftp.soest.hawaii.edu/pibhmc/website/data/amsamoa/optical/ofu/ofu_toad_sb1216.zip>
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
<ftp://ftp.soest.hawaii.edu/pibhmc/website/data/amsamoa/optical/ofu/OFU_TOAD_ALL2_445.jpg>
Offline_Option:
Offline_Media: CD-ROM
Recording_Format: ISO 9660
Digital_Form:
Digital_Transfer_Information:
Format_Name: AVI
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
<http://www.soest.hawaii.edu/pibhmc/pibhmc_amsamoa_optical_data.html>
Fees: None
Standard_Order_Process:
Non-digital_Form:
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
Fees: None

Metadata_Reference_Information:
Metadata_Date: 20140423
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_Address:
Address_Type: mailing and physical
Address: NOAA IRC
Address: NMFS/PIFSC/CRED
Address: 1845 WASP Blvd., Building 176
City: Honolulu
State_or_Province: HI
Postal_Code: 96818
Country: USA
Contact_Voice_Telephone: 808 725-5360
Contact_Electronic_Mail_Address: nmfs.pic.credinfo@noaa.gov
Contact_Instructions: e-mail preferred
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Metadata_Access_Constraints: None
Metadata_Use_Constraints: None

CoRIS:
CoRIS_Metadata_Link:
<http://www.coris.noaa.gov/metadata/records/html/cred_toad_ofu_sb1216_2012.html>
CoRIS_Tracking_ID: 6960

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