Page C. Valentine 2020 1.0 vector digital dataset (polyline) data release DOI:10.5066/P91MNNSN 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/P91MNNSN https://cmgds.marine.usgs.gov/data/field-activity-data/2016-038-FA/ Page C. Valentine VeeAnn A. Cross 2020 1.0 data release DOI:10.5066/P91MNNSN Reston, VA U.S. Geological Survey Suggested citation: Valentine, P.C., and Cross, V.A., 2020, Station information, Seabed and Sample Imagery, and CTD Instrument Data Collected on Stellwagen Bank in September, 2016, U.S. Geological Survey Field Activity 2016-038-FA: U.S. Geological Survey data release, https://doi.org/10.5066/P91MNNSN . https://doi.org/10.5066/P91MNNSN https://cmgds.marine.usgs.gov/data/field-activity-data/2016-038-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 41 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=2016-038-FA . The grain-size analyses of the sediment samples collected during this field activity is available in a separate publication (Valentine and Cross, 2019; link available from the cross-reference citation). 20160916 20160919 Ground condition of when data were collected. There were two days of data collection. September 16 and 19, 2016. complete None planned -70.458220 -70.139840 42.42123 42.171450 USGS Metadata Identifier USGS:82146d5e-0e51-46ae-a636-8666aa49a0e1 None U.S. Geological Survey USGS Coastal and Marine Hazards and Resources Program CMHRP Woods Hole Coastal and Marine Science Center WHCMSC National Oceanic and Atmospheric Administration NOAA SEABed Observation and Sampling System SEABOSS stations navigation video trackline polyline shapefile ISO 19115 Topic Category oceans location USGS Thesaurus videos navigational data marine geology videography Marine Realms Information Bank (MRIB) keywords video observation None North America United States Massachusetts Atlantic Ocean Stellwagen Bank Stellwagen Bank National Marine Sanctuary SBNMS Massachusetts Bay 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/2016-038-FA/data/imagery/2016-038-FA_video_driftlines_browse.jpg Browse graphic showing the video drift lines. JPEG D.S. Blackwood K.F. Parolski 2001 Sea Technology v. 42, no. 2, p.39-43 P. Valentine D. Blackwood K. Parolski 2000 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/ Page C. Valentine VeeAnn A. Cross 2019 data release DOI:10.5066/P9FWFLPD Reston, VA U.S. Geological Survey This publication includes the sediment sample analyses information associated with this field activity and 19 other field activities. https://doi.org/10.5066/P9FWFLPD https://www.sciencebase.gov/catalog/item/5d95153ee4b0c4f70d10a4f7 Each record within the shapefile has the same information and was derived in the same manner. 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 one-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). The SEABOSS may also drift away from the survey vessel when deployed to the sea floor. Seabed videos were collected using two battery-operated, high-definition (1920 x 1080 pixels) GoPro digital video cameras and a Seaviewer high-definition(1920 x 720 pixels) digital camera mounted on the USGS SEABed Observation and Sampling System (SEABOSS). See the cross-references for additional description of the SEABOSS system. 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 GoPro 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 Kelvin. Two parallel red lasers mounted 20 centimeters apart provided a scale in the video images. 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 5 to 18 minutes. Video files are archived in .MP4 format and range in size from 1.1 to 3.9 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 (latitude and longitude) and time of the start of the video drift was recorded from the navigation receiver by hand in the log book at the time of the deployment of the SEABOSS, when it reached the seabed, and when it left the seabed. Latitude and longitude positions recorded by hand in the log book were later adjusted to match the data recorded in the GPS navigation file based on time. Video was recorded during the descent through the water column (1-2 minutes) and during the drift over the seabed. 2016 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 $IIGGA navigation was run through an AWK script (awkauk.ipgga2days_fixrnd, on a machine running Cygwin - www.cygwin.com) 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 out to five decimal places), longitude (decimal degrees out to five decimal places), hour, minute, second, Julian day, year. The Julian day was determined by the original date in the filename of the navigation file as the $IIGGA string does not contain any date information. The script made sure to round the latitude and longitude values to five decimal places in the same way that Excel would round the values. The AWK script also made sure that there were no duplicate records in terms of time, such as two navigation points recorded at 16:38:23. Depending on the boat drift rate, navigation fixes carried out to only five decimal places could have duplicate fixes. 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. 2020 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. 2020 A Python script (driftlog_gui_v5.py) run from Python IDLE version 2.7.14 on Windows 10 was used to extract all the navigation points from the navigation file based on the start and end time of the video drift and combine these into polylines. Ideally, there is a match of the same time (with a corresponding navigation fix) in the GPS file to the start and end video times recorded in the log book. 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 shapefile in the Python script. The resulting shapefile has a polyline for every video drift. Based on the navigation system, the coordinate system of the dataset was set to geographic coordinates, WGS 84. 2020 Vector String 41 0.00001 0.00001 Decimal degrees D_WGS_1984 WGS_1984 6378137.000000 298.257224 2016-038_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 40 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 is 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 2016 2016 JD Julian day of the video drift based on the date in UTC time at the deployment of the SEABOSS. Julian day is the integer number representing the interval of time in days since January 1 of the year of collection. U.S. Geological Survey 260 263 LineStart Start time of the video drift when the SEABOSS reached the seabed 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 when the SEABOSS left the seabed 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 2016-038-FA_video_driftlines.zip contains the video drift lines shapefile (2016-038-FA_video_driftlines.shp and other files associated with a shapefile). The ZIP file also contains the browse graphic (2016-038-FA_video_driftlines_browse.jpg) and FGDC CSDGM metadata in XML format. Although these data have been processed successfully on a computer system at the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty. The USGS or the U.S. Government shall not be held liable for improper or incorrect use of the data described and/or contained herein. 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, browse graphic, and FGDC CSDGM metadata. 1 https://cmgds.marine.usgs.gov/data/field-activity-data/2016-038-FA/data/imagery/2016-038-FA_video_driftlines.zip https://doi.org/10.5066/P91MNNSN https://cmgds.marine.usgs.gov/data/field-activity-data/2016-038-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. The last two links go to the same place; one is the DOI designation of the publication. none The ZIP file contains data in Esri shapefile format. The user must software capable of uncompressing the ZIP file and reading the data format. 20240318 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 whsc_data_contact@usgs.gov The metadata contact email address is a generic address in the event the person is no longer with USGS. (updated on 20240318) Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998