Page C. Valentine
2019
Video transects of the sea floor on Stellwagen Bank during U.S. Geological Survey field activity 2017-030-FA, aboard the R/V Auk, May 18-23, 2017
1.0
Vector Digital Data Set (Polyline)
data release
DOI:10.5066/P94GOZ7C
Woods Hole Coastal and Marine Science Center, Woods Hole, MA
U.S. Geological Survey, Coastal and Marine Hazards and Resources Program
https://doi.org/10.5066/P94GOZ7C
https://cmgds.marine.usgs.gov/data/field-activity-data/2017-030-FA/
Page C. Valentine
VeeAnn A. Cross
2019
Sea-floor sediment samples, seabed imagery, and CTD instrument data collected on Stellwagen Bank in May 2017, U.S. Geological Survey Field Activity 2017-030-FA
1.0
data release
DOI:10.5066/P94GOZ7C
Reston, VA
U.S. Geological Survey
Suggested citation: Valentine, P.C., and Cross, V.A., 2019, Sea-floor sediment samples, seabed imagery, and CTD instrument data collected on Stellwagen Bank in May 2017, U.S. Geological Survey Field Activity 2017-030-FA: U.S. Geological Survey data release, https://doi.org/10.5066/P94GOZ7C.
https://doi.org/10.5066/P94GOZ7C
https://cmgds.marine.usgs.gov/data/field-activity-data/2017-030-FA/
This field activity is part of the effort to map geologic substrates of the Stellwagen Bank National Marine Sanctuary region off Boston, Massachusetts. The overall goal is to develop high-resolution (1:25,000) interpretive maps, based on multibeam sonar data and seabed sampling, showing surficial geology and seabed sediment dynamics. This cruise was conducted in collaboration with the Stellwagen Bank National Marine Sanctuary, and the data collected will aid research on the ecology of fish and invertebrate species that inhabit the region. The Sanctuary's research vessel, R/V Auk, visited 50 locations on Stellwagen Bank at which a customized Van Veen grab sampler (SEABOSS) equipped with a video camera and a CTD was deployed in drift mode to collect sediment for grain-size analysis, video imagery of the seabed, and measurements of water column properties.
These video tracklines indicate where imagery data of the sea floor were collected. This information will be used in making the seabed geologic map.
Additional information regarding the field activity can be obtained from https://cmgds.marine.usgs.gov/fan_info.php?fan=2017-030-FA.
20170518
20170523
ground condition when data were collected. Actual dates of collection May 18, 19, and 23, 2017
None planned
-70.458560
-70.134090
42.420730
42.171150
USGS Metadata Identifier
USGS:c293fa79-05ba-43ba-ae3d-203f529c6d83
None
U.S. Geological Survey
USGS
Coastal and Marine Hazards and Resources Program
CMHRP
Woods Hole Coastal and Marine Science Center
WHCMSC
stations
navigation
video
trackline
polyline shapefile
ISO 19115 Topic Category
oceans
location
geoscientificInformation
USGS Thesaurus
videos
navigational data
marine geology
Marine Realms Information Bank (MRIB) keywords
video observation
None
North America
United States
Massachusetts
Atlantic Ocean
Stellwagen Bank
SBNMS
Massachusetts Bay
Stellwagen Bank National Marine Sanctuary
None.
None.
U.S. Geological Survey
Page C. Valentine
Research Geologist
mailing and physical address
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
USA
(508) 548-8700 x2239
(508) 457-2310
pvalentine@usgs.gov
https://cmgds.marine.usgs.gov/data/field-activity-data/2017-030-FA/data/imagery/2017-030-FA_video_driftlines_browse.jpg
Browse graphic showing the video drift lines.
JPEG
D.S. Blackwood
K.F. Parolski
2001
Seabed observation and sampling system
Sea Technology
v. 42, no. 2, p.39-43
P. Valentine
D. Blackwood
K. Parolski
2000
Seabed observation and sampling system
U.S. Geological Survey Fact Sheet
FS-142-00
Reston, VA
U.S. Geological Survey
https://doi.org/10.3133/fs14200
https://pubs.usgs.gov/fs/fs142-00/
Each record within the shapefile has the same information and was derived in the same manner. There is an apparent gap in station numbers. Some stations were plankton tows, therefore no video was recorded.
This represents the video trackline information for every video drift line obtained during this cruise.
The location information for stations was acquired from a satellite navigation receiver (Furuno satellite compass SC-30, GPS receiver) at two second intervals with a horizontal accuracy of 10 m. The navigation antenna is located 5.3 m forward of the SEABOSS deployment location. This offset was not accounted for in the navigation acquisition (navigation fixes represent antenna location).
Seabed video images were collected using a battery-operated, high-definition (1920 x 1080 pixels) GoPro digital video camera mounted on the USGS SEABed Observation and Sampling System (SEABOSS). See the cross-references for additional description of the SEABOSS system. The SEABOSS system had two GoPro cameras and a Seaviewer camera attached to it. The Seaviewer camera had a live feed to the surface and was used only to observe obstacles, like gill nets and lobster gear, in order to avoid entanglement. In the case of camera failure, the additional cameras provided backup video.
As the SEABOSS drifted over the seabed, the cameras imaged the seabed at a rate of 60 frames per second from an altitude of ~1 meter. Lighting was provided by two, battery-operated Keldan LED video lights. Each light provided a light flux of up to 9000 lumens at a correlated color temperature of 5000 kelvins. Two parallel red lasers mounted 20 centimeters apart provided a scale in the video images. (See the cross-references for more information about SEABOSS)
Video imagery includes the launch and recovery of the SEABOSS, transit through the water column, and the drift over the seabed. The duration of individual video files ranges from 6 to 12 minutes. Video files are archived in .MP4 format and range in size from 1.4 to 2.7 gigabytes.
These video files are not available as part of this data release. Video files are archived at the USGS Woods Hole Coastal and Marine Science Center, 384 Woods Hole Road, Woods Hole, MA 02543.
The position (lat/lon) of the start of the video drift was recorded (from the navigation receiver) in the log book at the time of the deployment of the SEABOSS. Video was recorded during the descent through the water column (1-2 minutes), during the drift over the seabed, and during the ascent to the surface. The position (lat/lon) of the end of the video drift was recorded at the beginning of the ascent through the water column. The corresponding times are also recorded.
2017
U.S. Geological Survey
Page C. Valentine
Research Geologist
mailing and physical address
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
USA
(508) 548-8700 x2239
(508) 457-2310
pvalentine@usgs.gov
The original raw $GPGGA navigation (available from the Larger Work citation) was run through an AWK script (awkauk.gpgga, on a machine running Cygwin) to reformat the latitudes and longitudes into decimal degrees and output the data into a comma-delimited text file with the following columns of information: latitude (decimal degrees), longitude (decimal degrees), hour, minute, second, Julian day, year. The Julian day was determined by the original date in the filename of the navigation file as the GPGGA string does not contain any date information. The AWK script also made sure that there were not duplicate records in terms of time - such as two navigation points recorded at 16:38:23. The individual navigation files were concatenated into a single file - in order of acquisition. This process step and the remaining process steps were performed by the same person - VeeAnn A. Cross.
2019
U.S. Geological Survey
VeeAnn A. Cross
Marine Geologist
Mailing and Physical
384 Woods Hole Road
Woods Hole
MA
02543-1598
508-548-8700 x2251
508-457-2310
vatnipp@usgs.gov
Another AWK script (awkdrift_pullstartend) was run on the stations summary CSV file to extract the following columns of information: station, Julian day of video start, UTC time of video start, Julian day of video end, UTC time of video end, year
2019
A Python script (driftlog_gui_v5.py) run from Python IDLE version 2.7.14 was used to extract all the navigation points from the navigation file based on the start and end time of the video drift. Ideally, there is a match of the same time (with a corresponding navigation fix) in the GPS file to the start video time recorded in the log book. This also applies to the ending time. However, if this situation does not exist, then the closest (in time) navigation record to the start and end time of the video transect is used - along with all the navigation points in between those two times. These extracted points were then combined into a polyline within a shapefile. The resulting shapefile has a polyline for every video drift. Based on the navigation system, the projection of the dataset was set to geographic, WGS 84.
2019
Added keywords section with USGS persistent identifier as theme keyword.
20200908
U.S. Geological Survey
VeeAnn A. Cross
Marine Geologist
Mailing and Physical
384 Woods Hole Road
Woods Hole
MA
02543-1598
508-548-8700 x2251
508-457-2310
vatnipp@usgs.gov
Vector
String
50
0.00001
0.00001
Decimal degrees
D_WGS_1984
WGS_1984
6378137.000000
298.257224
2017-030-FA_video_driftlines.shp
polyline shapefile of video drift transects
U.S. Geological Survey
FID
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
Shape
Feature geometry.
Esri
Coordinates defining the features.
ID
Unique identifier for each record in the polyline shapefile.
U.S. Geological Survey
0
49
Survey
Name or number of cruise on which sample collected. The cruise identifier is in the format YYYY-XXX-FA where YYYY is the survey year, XXX is the survey number of that year, and FA indicates field activity.
U.S. Geological Survey
Character string.
Station
Sample or station name or number as assigned in the field by the Chief Scientist.
U.S. Geological Survey
Character set. Although numeric, stations could have a decimal number indicating a reoccupation of a station.
Year
Year the station was occupied.
U.S. Geological Survey
2017
2017
JD
Julian day is the integer number representing the interval of time in days since January 1 of the year of collection. Based on the date in UTC time at the time of deployment of the SEABOSS.
U.S. Geological Survey
138
143
LineStart
Start time of the video drift as recorded in the log book, in UTC time in HH:MM:SS.
U.S. Geological Survey
Number represented as a text field.
LineEnd
End time of the video drift as recorded in the log book, in UTC time in HH:MM:SS.
U.S. Geological Survey
Number represented as a text field.
GPSStart
Time in the GPS navigation file that is closest to the start time of the video drift as recorded in the log book. UTC time in HH:MM:SS.
U.S. Geological Survey
Number represented as a text field.
GPSEnd
Time in the GPS navigation file that is closest to the end time of the video drift as recorded in the log book. UTC time in HH:MM:SS.
U.S. Geological Survey
Number represented as a text field.
U.S. Geological Survey
Page C. Valentine
Research Geologist
mailing and physical address
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
USA
(508) 548-8700 x2239
(508) 457-2310
pvalentine@usgs.gov
2017-030-FA_video_driftlines.zip contains the 2017-030-FA_video_driftlines.shp and other files associated with a shapefile. The ZIP file also contains the browse graphic (2017-030-FA_video_driftlines_browse.jpg) and FGDC CSDGM metadata in TXT, XML, and HTML formats.
Neither the U.S. Government, the Department of the Interior, nor the USGS, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Shapefile
ArcGIS 10.6.1
The ZIP file contains the video drift transects polyline shapefile, along with the FGDC CSDGM metadata.
0.1
https://cmgds.marine.usgs.gov/data/field-activity-data/2017-030-FA/data/imagery/2017-030-FA_video_driftlines.zip
https://doi.org/10.5066/P94GOZ7C
https://cmgds.marine.usgs.gov/data/field-activity-data/2017-030-FA/
The first link is to download the data in a ZIP file. The second and third links are to the landing page of the data. Although the last two links go to the same place, one is the DOI designation of the publication.
none
These data are available in Esri shapefile format. The user must software capable of reading this format. The data are available for download in zip format.
20200908
U.S. Geological Survey
VeeAnn A. Cross
Marine Geologist
mailing and physical address
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
508-548-8700 x2251
508-457-2310
vatnipp@usgs.gov
FGDC Content Standards for Digital Geospatial Metadata
FGDC-STD-001-1998