Survey lines along which SEABed Observation and Sampling System (SEABOSS) video were collected by the U.S. Geological Survey offshore of Massachusetts between Duxbury and Hull (DH_SeabossTrackline shapefile, Geographic, WGS84)

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Frequently anticipated questions:


What does this data set describe?

Title:
Survey lines along which SEABed Observation and Sampling System (SEABOSS) video were collected by the U.S. Geological Survey offshore of Massachusetts between Duxbury and Hull (DH_SeabossTrackline shapefile, Geographic, WGS84)
Abstract:
These data were collected under a cooperative agreement with the Massachusetts Office of Coastal Zone Management (CZM) and the U.S. Geological Survey (USGS), Coastal and Marine Geology Program, Woods Hole Science Center (WHSC). Initiated in 2003, the primary objective of this program is to develop regional geologic framework information for the management of coastal and marine resources. Accurate data and maps of sea-floor geology are important first steps toward protecting fish habitat, delineating marine resources, and assessing environmental changes due to natural or human impacts. The project is focused on the inshore waters (5-30 m deep) of Massachusetts between the New Hampshire border and Cape Cod Bay. Data collected for the mapping cooperative have been released in a series of USGS Open-File Reports (http://woodshole.er.usgs.gov/project-pages/coastal_mass/html/current_map.html). This spatial dataset is from the study area located between Duxbury and Hull Massachusetts, and consists of high-resolution geophysics (bathymetry, backscatter intensity, and seismic reflection) and ground validation (sediment samples, video tracklines and bottom photographs). The data were collected during four separate surveys conducted between 2003 and 2007 (NOAA survey H10993 in 2003, USGS-WHSC survey 06012 in 2006, and USGS-WHSC surveys 07001 and 07003 in 2007) and cover more than 200 square kilometers of the inner continental shelf.
  1. How might this data set be cited?
    U.S. Geological Survey, 2010, Survey lines along which SEABed Observation and Sampling System (SEABOSS) video were collected by the U.S. Geological Survey offshore of Massachusetts between Duxbury and Hull (DH_SeabossTrackline shapefile, Geographic, WGS84): Open-File Report 2009-1072, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Science Center, Woods Hole, Massachusetts.

    Online Links:

    This is part of the following larger work.

    Barnhardt, Walter A., Ackerman, Seth D., Andrews, Brian D., and Baldwin, Wayne E., 2010, Geophysical and Sampling Data from the Inner Continental Shelf: Duxbury to Hull, Massachusetts.: Open-File Report 2009-1072, U.S. Geological Survey, Reston, VA.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -70.815638
    East_Bounding_Coordinate: -70.598280
    North_Bounding_Coordinate: 42.329690
    South_Bounding_Coordinate: 42.088131
  3. What does it look like?
    http://pubs.usgs.gov/of/2009/1072/GIS/browse_jpg/big/DH_SeabossTrackline.jpg (JPEG)
    Thumbnail image of video tracklines
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 07-Sep-2007
    Ending_Date: 11-Sep-2007
    Currentness_Reference:
    ground condition
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: vector digital data
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
      This is a Vector data set. It contains the following vector data types (SDTS terminology):
      • String (77)
    2. What coordinate system is used to represent geographic features?
      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.000001. Longitudes are given to the nearest 0.000001. Latitude and longitude values are specified in Decimal degrees. The horizontal datum used is D_WGS_1984.
      The ellipsoid used is WGS_1984.
      The semi-major axis of the ellipsoid used is 6378137.000000.
      The flattening of the ellipsoid used is 1/298.257224.
  7. How does the data set describe geographic features?
    DH_SeabossTrackline
    SEABOSS Trackline (Source: USGS)
    FID
    Internal feature number. (Source: ESRI) Sequential unique whole numbers that are automatically generated.
    Shape
    Feature geometry. (Source: ESRI) Coordinates defining the features.
    JULDAY
    Julian day photograph was acquired based on UTC time. (Source: U.S. Geological Survey) Character string of width 4
    Length
    Length of SEABOSS video trackline in meters (UTM Zone 19N, WGS84) (Source: U.S. Geological Survey)
    Range of values
    Minimum:41.37
    Maximum:347.51
    Units:meters
    Resolution:0.01
    LINENAME
    This indicates the SEABOSS station number or SEABOSS trackline along which digital still photos and continuous bottom video were acquired. (Source: U.S. Geological Survey) Character string of width 4
    STARTTIME
    Start time of the SEABOSS video drift in UTC (hh:mm:ss) (Source: U.S. Geological Survey) Character string of width 8
    ENDTIME
    End time of the SEABOSS video drift in UTC (hh:mm:ss) (Source: U.S. Geological Survey) Character string of width 8
    ImageLink
    This field is reserved for a link to video files and/or photo mosaics that will be created from the frames parsed from the video data. When these video and photo mosaics are available the "hotlink" feature can be easily used within an ESRI ArcMap project to connect those datasets with the spatial data contained in this shapefile. (Source: U.S. Geological Survey) Character string of width 254
    SURVEYID
    WHSC field activity number (Source: USGS) Character string of width 10
    DEVICEID
    Sampling device used to collect bottom video (Source: USGS) Character string of width 25
    VEHICLEID
    Survey vessel name (Source: USGS) Character string of width 25

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • U.S. Geological Survey
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
    Seth Ackerman
    U.S. Geological Survey
    Geologist
    384 Woods Hole Rd.
    Woods Hole, MA
    USA

    508-548-8700 x2315 (voice)
    508-457-2310 (FAX)
    sackerman@usgs.gov

Why was the data set created?

This data set includes the tracklines (the linear extent) of bottom video acquired with the large SEABed Observation and Sampling System (SEABOSS) during USGS survey 07003, conducted September 7-11, 2007 aboard the R/V Connecticut offshore Massachusetts in the Duxbury to Hull survey area. This data set was collected to ground-truth (verify) the acoustic data sets that were acquired during NOAA hydrographic survey H10993 (2003) and USGS geophysical surveys 06012 (2006) and 07001 (2007). High-resolution digital photographs of the sea-floor were also taken during the video drift (see shapefile DH_BottomPhotos.shp)

How was the data set created?

  1. From what previous works were the data drawn?
    Information unavailable from original metadata. (source 1 of 1)
    Information unavailable from original metadata., unknown, Information unavailable from original metadata..

    Other_Citation_Details:
    The source information was incomplete and had to be modified to meet the standard. Only the source time period of content was supplied.
    Type_of_Source_Media: Information unavailable from original metadata.
    Source_Contribution: Information unavailable from original metadata.
  2. How were the data generated, processed, and modified?
    Date: Sep-2007 (process 1 of 10)
    One hundred eighty-four target stations were occupied aboard the R/V Connecticut (USGS survey 07003) with the large SEABOSS (Blackwood and Parolski, 2001) that was equipped with a Van Veen grab sampler, a digital still camera, and a video camera. Seventy-seven of those sites are within the Duxbury to Hull survey area. The digital photographs were downloaded from the camera and backed-up to a laptop and hard-drive four times during the sampling survey; bottom video was recorded directly to DVD-video disc Person who carried out this activity:
    Seth Ackerman
    U.S. Geological Survey
    Geologists
    384 Woods Hole Road
    Woods Hole, MA
    USA

    (508) 548-8700 x2315 (voice)
    (508) 457-2310 (FAX)
    sackerman@usgs.gov
    Data sources produced in this process:
    • DVD seafloor videos
    Date: Jan-2009 (process 2 of 10)
    Differential Global Positioning System (DGPS) navigation was logged through a Microsoft HyperTerminal (version 5.1) session on a Dell Latitude D820 laptop computer running Windows XP, SP2. Log files were saved for each sampling watch then reformatted into log files by Julian Day (e.g. nav_sda.251) during post-processing. The AWK script HT_doGPGGA.awk was modified accordingly for each Julian Day and run on each Julian Day file creating a comma separated value (CSV) ASCII text file to parse for the GPGGA navigation string and reformatted the file for input to the Python ground-truth toolset. The individual Julian Day navigation files were concatenated into a single navigation file for the entire sampling survey (07003_allnav_gpgga_formatted.csv).
    	cat gpgga_out* > 07003_allnav_gpgga_formatted.csv
    
    Person who carried out this activity:
    Seth Ackerman
    U.S. Geological Survey
    Geologist
    384 Woods Hole Rd.
    Woods Hole, MA
    USA

    508-548-8700 x2315 (voice)
    508-457-2310 (FAX)
    sackerman@usgs.gov
    Data sources used in this process:
    • HyperTerminal generated navigation files (090807_day_watch.txt, 090907_night_watch.txt, etc.)
    Data sources produced in this process:
    • GPGGA parsed navigation files (gpgga_out.25[0-4])
    • GPGGA parsed navigation file (07003_allnav_gpgga_formatted.csv)
    Date: 18-Feb-2009 (process 3 of 10)
    Parsed and reformatted the manually kept Microsoft Excel survey log CONN07003_sedcruise.xls for SEABOSS station number, date, and the start and end time of each video drift. Person who carried out this activity:
    Seth Ackerman
    U.S. Geological Survey
    Geologist
    384 Woods Hole Rd.
    Woods Hole, MA
    USA

    508-548-8700 x2315 (voice)
    508-457-2310 (FAX)
    sackerman@usgs.gov
    Data sources used in this process:
    • Survey Log - CONN07003_sedcruise.xls
    Data sources produced in this process:
    • drifttime_07003.csv
    Date: 18-Feb-2009 (process 4 of 10)
    Create ESRI polyline shapefile joining the SEABOSS drift time log with the navigation based on matching date and time fields using ArcGIS 9.3 ArcToolbox tool "USGS GTC Tools v2008 - Drift_nav - Vee2008" (which uses the Python script "Script1_startend_9_2008proj.py (v.Oct 1, 2008); inputs: drift file - drifttime_07003.csv outfile - drifttime_07003_vee2.shp template- template_geo.shp navfile - 07003_allnav_gpgga_formatted.csv). The Python script reads the start and end times from the drift log file (drifttime_07003.csv) and extracts the navigation points that fall within those start and end times, then it creates a polyline shapefile from the points with a unique line for each SEABOSS drift site. Person who carried out this activity:
    Seth Ackerman
    U.S. Geological Survey
    Geologist
    384 Woods Hole Rd.
    Woods Hole, MA
    USA

    508-548-8700 x2315 (voice)
    508-457-2310 (FAX)
    sackerman@usgs.gov
    Data sources used in this process:
    • 07003_allnav_gpgga_formatted.csv
    • drifttime_07003.csv
    Data sources produced in this process:
    • drifttime_07003_vee2.shp
    Date: 07-Jul-2009 (process 5 of 10)
    XTools Pro (version 5.3.0) for ArcGIS desktop was used to reorganize, delete unnecessary fields and add new fields to the point shapefile's attribute table (Table Operations - Table Restructure). Table attributes for the survey ID ("SURVEYID'), device used to collect the data ('DEVICEID'), survey vessel name ('VEHICLEID') and imagelink ('IMAGELINK') were added and populated using the table editor in ArcMap (version 9.3). The length field ('LENGTH') was populated using 'Calculate Geometry' (Property=Length; Use coordinate system of the data frame=WGS 1984 UTM Zone 19N; Unit=Kilometers), which can be accessed by right-clicking on the attribute field name in the table view. The attributes for start time ('STARTTIME'), end time ('ENDTIME'), and SEABOSS station number ('LINENAME') were already populated. Person who carried out this activity:
    Seth Ackerman
    U.S. Geological Survey
    Geologist
    384 Woods Hole Rd.
    Woods Hole, MA
    USA

    508-548-8700 x2315 (voice)
    508-457-2310 (FAX)
    sackerman@usgs.gov
    Data sources used in this process:
    • drifttime_07003_vee2.shp
    Data sources produced in this process:
    • DH_SeabossTrackline.shp
    Date: 08-Jul-2009 (process 6 of 10)
    ArcCatalog 9.3 was used to define the projection of the ESRI shapefile as Geographic (Decimal_Degrees_WGS84.prj) and to create the .prj file. Person who carried out this activity:
    Seth Ackerman
    U.S. Geological Survey
    Geologist
    384 Woods Hole Rd.
    Woods Hole, MA
    USA

    508-548-8700 x2315 (voice)
    508-457-2310 (FAX)
    sackerman@usgs.gov
    Data sources used in this process:
    • DH_SeabossTrackline.shp
    Data sources produced in this process:
    • DH_SeabossTrackline.prj
    Date: 12-Nov-2015 (process 7 of 10)
    Edits to the metadata were made to fix any errors that MP v 2.9.30 flagged. This is necessary to enable the metadata to be successfully harvested for various data catalogs. In some cases, this meant adding text "Information unavailable" or "Information unavailable from original metadata" for those required fields that were left blank. The source information was incomplete and had to be modified to meet the standard. Only the source time period of content was supplied. Other minor edits were probably performed (title, publisher, publication place, etc.). The metadata date (but not the metadata creator) was edited to reflect the date of these changes. The metadata available from a harvester may supersede metadata bundled within a download file. Compare the metadata dates to determine which metadata file is most recent. Person who carried out this activity:
    U.S. Geological Survey
    Attn: VeeAnn A. Cross
    Marine Geologist
    384 Woods Hole Rd.
    Woods Hole, MA

    508-548-8700 x2251 (voice)
    508-457-2310 (FAX)
    vatnipp@usgs.gov
    Date: 20-Jul-2018 (process 8 of 10)
    USGS Thesaurus keywords added to the keyword section. Person who carried out this activity:
    U.S. Geological Survey
    Attn: VeeAnn A. Cross
    Marine Geologist
    384 Woods Hole Road
    Woods Hole, MA

    508-548-8700 x2251 (voice)
    508-457-2310 (FAX)
    vatnipp@usgs.gov
    Date: 18-Nov-2019 (process 9 of 10)
    Crossref DOI link was added as the first link in the metadata. Person who carried out this activity:
    U.S. Geological Survey
    Attn: VeeAnn A. Cross
    Marine Geologist
    384 Woods Hole Road
    Woods Hole, MA

    508-548-8700 x2251 (voice)
    508-457-2310 (FAX)
    vatnipp@usgs.gov
    Date: 08-Sep-2020 (process 10 of 10)
    Added keywords section with USGS persistent identifier as theme keyword. Person who carried out this activity:
    U.S. Geological Survey
    Attn: VeeAnn A. Cross
    Marine Geologist
    384 Woods Hole Road
    Woods Hole, MA

    508-548-8700 x2251 (voice)
    508-457-2310 (FAX)
    vatnipp@usgs.gov
  3. What similar or related data should the user be aware of?
    Blackwood, D., and Parolski, K., 2001, Seabed observation and sampling system: Sea Technology v. 42, no. 2, p. 39-43.

    Barnhardt, Walter A., Andrews, Brian D., and Butman, Bradford, 2006, High-Resolution Mapping of the Inner Continental Shelf: Nahant to Gloucester, Massachusetts: Open-File Report 2005-1293, U.S. Geological Survey, Reston, VA.

    Online Links:

    Ackerman, Seth D., Butman, Bradford, Barnhardt, Walter A., Danforth, William W., and Crocker, James M., 2006, High-Resolution Geologic Mapping of the Inner Continental Shelf: Boston Harbor and Approaches, Massachusetts: Open-File Report 2006-1008, U.S. Geological Survey, Reston, VA.

    Online Links:

    Barnhardt, Walter A., Andrews, Brian D., Ackerman, Seth D., Baldwin, Wayne E., and Hein, Christopher J., 2009, High-Resolution Geological Mapping of the Inner Continental Shelf: Cape Ann to Salisbury Beach, Massachusetts: Open-File Report 2007-1373, U.S. Geological Survey, Reston, VA.

    Online Links:


How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?
  2. How accurate are the geographic locations?
    Navigation for survey 07003 used differential Global Positioning System (GPS). The recorded position of each node along the SEABOSS trackline is actually the position of the GPS antenna on the survey vessel, not the SEABOSS sampler. The SEABOSS was deployed approximately 5 meters astern of the GPS antenna off the ship's J-frame on the starboard side. No layback or offset was applied to the recorded position. In addition to the ±5 meter offset the SEABOSS may drift additionally away from the survey vessel when deployed to the seafloor. Based on the various sources for horizontal offsets, a conservative estimate the horizontal accuracy of the SEABOSS trackline is 20-30 meters.
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    Only the subset of SEABOSS sites occupied during the R/V Connecticut survey 07003 within the Duxbury to Hull survey area have been included in this spatial dataset. Seventy-seven stations were occupied within the study area between Duxbury and Hull. A total of 184 sampling sites were occupied during survey 07003. The SEABOSS video tracklines that are not included in this report are from sites south of Brant Rock, Massachusetts and will be published in a subsequent data release focused on Cape Cod Bay. The length of the trackline represents the distance along the drift that that bottom was in view on the video. It does not include video of the water column during deployment or retrieval.
  5. How consistent are the relationships among the observations, including topology?
    Trackline data from all video transects in the Duxbury to Hull survey area are included in this shapefile. Gaps in sequential video station numbers may exist.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?
Access_Constraints: None
Use_Constraints:
Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey as the source of this information.
  1. Who distributes the data set? (Distributor 1 of 1)
    Seth Ackerman
    U.S. Geological Survey
    Geologist
    384 Woods Hole Rd.
    Woods Hole, MA
    USA

    508-548-8700 x2315 (voice)
    508-457-2310 (FAX)
    sackerman@usgs.gov
  2. What's the catalog number I need to order this data set? Downloadable Data
  3. What legal disclaimers am I supposed to read?
    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.
  4. How can I download or order the data?
  5. What hardware or software do I need in order to use the data set?
    These data are available as a shapefile in Environmental Systems Research Institute (ESRI) format. To utilize these data, the user must have software capable of viewing ESRI shapefiles. The shapefile is also distributed in compressed format as one WinZip (ver. 9.0) file. To utilize these data, the user must be able to uncompress the WinZip file.

Who wrote the metadata?

Dates:
Last modified: 08-Sep-2020
Metadata author:
Seth Ackerman
U.S. Geological Survey
Geologist
384 Woods Hole Rd.
Woods Hole, MA
USA

508-548-8700 x2315 (voice)
508-457-2310 (FAX)
sackerman@usgs.gov
Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)

This page is <https://cmgds.marine.usgs.gov/catalog/whcmsc/open_file_report/ofr2009-1072/DH_SeabossTrackline.shp.faq.html>
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