Tracklines for bottom video collected using the MINI-SEABOSS sampler in Barnegat Bay, NJ by the U.S. Geological Survey during 3 surveys in 2012 and 2013 (Esri polyline shapefile, Geographic, WGS 84)

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Frequently anticipated questions:


What does this data set describe?

Title:
Tracklines for bottom video collected using the MINI-SEABOSS sampler in Barnegat Bay, NJ by the U.S. Geological Survey during 3 surveys in 2012 and 2013 (Esri polyline shapefile, Geographic, WGS 84)
Abstract:
Water quality in the Barnegat Bay-Little Egg Harbor estuary along the New Jersey coast is the focus of a multidisciplinary research project begun in 2011 by the U.S. Geological Survey in partnership with the New Jersey Department of Environmental Protection. This narrow estuary is the drainage for the Barnegat Watershed and flushed by just three inlets connecting it to the Atlantic Ocean, is experiencing degraded water quality, algal blooms, loss of seagrass, and increases in oxygen -depletion events, seaweed, stinging nettles, and brown tide. The scale of the estuary and the scope of the problems within it necessitate a multidisciplinary approach that includes characterizing its physical characteristics (for example, depth, magnitude and direction of tidal currents, distribution of seafloor and subseafloor sediment) and modeling how the physical characteristics interact to affect the estuary's water quality. Scientists from USGS Coastal and Marine Geology Program offices in Woods Hole, Massachusetts, and St. Petersburg, Florida, began mapping the seafloor of the Barnegat Bay-Little Egg Harbor estuary in November 2011 and completed in September 2013. With funding from the New Jersey Department of Environmental Protection and logistical support from the USGS New Jersey Water Science Center, they collected data with a suite of geophysical tools, including swath bathymetric sonar for measuring seafloor depth, a sidescan sonar for collecting acoustic-backscatter data (which provides information about seafloor texture and sediment type), subbottom profiler for imaging sediment layers beneath the floor of the estuary, and sediment samples with bottom photographs for ground validation of the acoustic data. 2011-041-FA: http://woodshole.er.usgs.gov/operations/ia/public_ds_info.php?fa=2011-041-FA 2012-003-FA: http://woodshole.er.usgs.gov/operations/ia/public_ds_info.php?fa=2012-003-FA 2013-014-FA: http://woodshole.er.usgs.gov/operations/ia/public_ds_info.php?fa=2013-014-FA 2013-030-FA: http://woodshole.er.usgs.gov/operations/ia/public_ds_info.php?fa=2013-030-FA
  1. How might this data set be cited?
    U.S. Geological Survey, 2015, Tracklines for bottom video collected using the MINI-SEABOSS sampler in Barnegat Bay, NJ by the U.S. Geological Survey during 3 surveys in 2012 and 2013 (Esri polyline shapefile, Geographic, WGS 84): Data Series 937, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Coastal and Marine Science Center, Woods Hole, MA.

    Online Links:

    This is part of the following larger work.

    Andrews, Brian D., Miselis, Jennifer L., Danforth, William W., Irwin, Barry J., Worley, Charles R., Bergeron, Emile M., and Blackwood, Dann S., 2015, Marine geophysical data collected in a shallow back-barrier estuary: Barnegat Bay, New Jersey: Data Series 937, U.S. Geological Survey, Reston, VA.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -74.305617
    East_Bounding_Coordinate: -74.049987
    North_Bounding_Coordinate: 40.059409
    South_Bounding_Coordinate: 39.510100
  3. What does it look like?
    BarnBaySEABOSSTrks.jpg (JPEG)
    Thumbnail image of SEABOSS tracklines collected with Barnegat Bay, NJ. The file is located in the compressed zip file.
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 10-Apr-2012
    Ending_Date: 18-Sep-2013
    Currentness_Reference:
    Ground condition of SEABOSS sampling dates at the end of three surveys, 20120410-20120412, 20130328-20130329, 20130918-20130918.
  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 (176)
    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 0.0000001. Longitudes are given to the nearest 0.0000001. 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?
    BarnBaySEABOSSTrks
    Tracklines for SEABOSS (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.
    JulianDay
    The Julian day the video trackline was collected where Julian day is the integer number representing the interval of time in days since January 1 of the year (2012 or 2013) (Source: USGS)
    Range of values
    Minimum:87
    Maximum:261
    Units:julian day
    Resolution:1
    TimeStart
    The beginning of usable video in UTC format of HH:MM:SS (Source: USGS)
    Range of values
    Minimum:11:35:28
    Maximum:19:39:10
    Units:seconds
    TimeEnd
    End of usable video in UTC in the format HH:MM:SS (Source: USGS)
    Range of values
    Minimum:11:36:33
    Maximum:19:39:50
    Units:seconds
    Line
    The name of the target station (line) (Source: USGS)
    Range of values
    Minimum:1
    Maximum:85
    Units:line name
    Survey
    Woods Hole Coastal and Marine Science Center Field Activity Number. Where the first 4 characters are the year of the survey (2011), followed by the sequntial number of the survey (041), followed by "FA" for field activity. (Source: USGS) Character Set
    Length_m
    The lenth of the feature representing usable bottom video (Source: USGS)
    Range of values
    Minimum:2.1
    Maximum:94.8
    Units:meters
    Resolution:0.1

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?
    Please recognize the U.S. Geological Survey (USGS) as the source of this information.
  3. To whom should users address questions about the data?
    Brian Andrews
    U.S. Geological Survey
    Geographer
    384 Woods Hole Rd.
    Woods Hole, MA
    USA

    508-548-8700 x2348 (voice)
    508-457-2310 (FAX)
    bandrews@usgs.gov

Why was the data set created?

These tracklines record the position of the R/V Rafael while the MINI-SEABOSS was deployed and recording (usable) bottom video within Barnegat Bay, NJ. The purpose of collecting the bottom video is to validate (i.e. ground-truth) the acoustic remote sensing data (bathymetry, backscatter, seismic profile) collected during USGS Field Activities 2011-041-FA, 2012-003-FA, 2013-014-FA, and 2013-030-FA. Bottom photos and sediment samples were also collected and published in this report. The bottom videos are not published as part of this report.

How was the data set created?

  1. From what previous works were the data drawn?
    raw digital photographs (source 1 of 1)
    U.S. Geological Survey, Unpublished Material, digital photographs in JPEG format.

    Type_of_Source_Media: disc
    Source_Contribution:
    Trackline navigation was recorded using HYPACK (v. 11.16) navigation software.
  2. How were the data generated, processed, and modified?
    Date: 2013 (process 1 of 6)
    Step 1: Navigation Navigation for each survey day was recorded using HYPACK (v. 11.1.6) and saved to a HYPACK navigation file for each Julian Day. The navigation files are named by time and julian day. For example, HYPACK navigation file "474_1403.087" is Line number 474, that was started at 1403 (UTC) and recorded on Julian Day 087. Person who carried out this activity:
    Brian Andrews
    U.S. Geological Survey
    Geographer
    384 Woods Hole Rd.
    Woods Hole, MA
    USA

    508-548-8700 x2348 (voice)
    508-457-2310 (FAX)
    bandrews@usgs.gov
    Date: 2013 (process 2 of 6)
    Step 2: Review Video Log A Microsoft Excel spreadsheet was used during the survey to record the line, date and time (UTC) of the beginning and end of each MINI-SEABOSS deployment. After the survey, the video for each station was reviewed to adjust the start and end times to capture the times of usable video. Because of the shallow, turbid environment of Barnegat Bay, video quality was affected by disturbed sediment. Final video logs were saved as comma separated values (CSV) format for use in the next processing steps. Person who carried out this activity:
    Brian Andrews
    U.S. Geological Survey
    Geographer
    384 Woods Hole Rd
    Woods Hole, MA
    USA

    508-548-8700 x2348 (voice)
    508-457-2310 (FAX)
    bandrews@usgs.gov
    Data sources produced in this process:
    • SEABOSSDriftLog12003.csv
    • SEABOSSDriftLog13014.csv
    • SEABOSSDriftLog13030.csv
    Date: Nov-2013 (process 3 of 6)
    Step 3: Reformat Navigation Hypack navigation was reformatted, and extracted for times of each SEABOSS deployment as recorded in the "SurveyName"DriftLog.csv using several python scripts run using ArcToolbox (v. 9.3.1). First, the Hypack file for each Julian Day was parsed into the format Lat, Lon, Time, JulianDay, Year, CruiseID using the python script""Parse_Hypack_Nav". This script was run for each julian day of each survey. Input file is Hypack file for each julian day (line_time_julianday) and the output parsed file is "SurveyName"_JulianDay (12003_087.csv) Python scripts and toolbox were developed by Seth Ackerman, USGS Woods Hole Coastal and Marine Science Center. Person who carried out this activity:
    Brian Andrews
    U.S. Geological Survey
    Geographer
    384 Woods Hole Rd
    Woods Hole, MA
    USA

    508-548-8700 x2348 (voice)
    508-457-2310 (FAX)
    bandrews@usgs.gov
    Date: Dec-2013 (process 4 of 6)
    CONVERT POINTS TO LINES: Create polyline shapefile joining the SEABOSS drift time log with the navigation based on matching date and time fields using ArcGIS 9.3 ArcToolbox tool "z_SEABOSStools_demo2012. Seaboss_Trackline_Creator" (which uses the Python script "seaboss_trackline_creator_v1_1.py; inputs: drift file - SEABOSSDriftLog"SurveyName".csv; navfile - "SurveyName"_ALLnav_final.csv; outfile shapefile - "SurveyName"SEABOSSTrks.shp. The Python script reads the start and end times from the drift log file (SEABOSSDriftLog"SurveyName".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.
    Date: Dec-2013 (process 5 of 6)
    XTools Pro (version 9.2) for ArcGIS desktop (version 10.1) was used to reorganize, delete unnecessary fields and add new fields to the polyline shapefile's attribute table (Table Operations - Table Restructure). Table attributes for the date ('Date'), 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 10.1). The length field ('Length') was populated using 'Calculate Geometry' (Property=Length; Use coordinate system of the data frame=WGS 1984 UTM Zone 19N; Unit=Meters), which can be accessed by right-clicking on the attribute field name in the table view. The attributes for Julian day ('JulDay'), year ('Year'), start time ('StartTime'), end time ('EndTime'), and SEABOSS station number ('Linename') were already populated.
    Date: 20-Jul-2018 (process 6 of 6)
    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
  3. What similar or related data should the user be aware of?

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?
    The location of each video trackline was recorded using Differential Global Positioning System (DGPS). The recorded navigation for each trackline is actually the position of the GPS antenna on the cabin house of the R/V Rafael; not the location of the MINI-SEABOSS sampler. The MINI-SEABOSS was deployed from a davit on the starboard side of the R/V Rafael. The davit is approximately 2 meters astern, and 1 meter to starboard of the GPS antenna. No layback or offset was applied to the recorded position. In addition to this +/-3 meter offset the MINI-SEABOSS may additionally drift away from the survey vessel when deployed to the seafloor. Based on the various sources for horizontal offsets, a conservative estimate of the horizontal accuracy of the sediment sample is 5-7 meters.
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    This polyline dataset records the location of the R/V Rafael while the Mini-SEABOSS was recording (usable) video and drifting at target stations during three separate surveys in 2012 and 2013. A total of 253 stations were occupied. The tracklines end when the quality of the video is no longer useful and may end before the sediment sample is acquired.
  5. How consistent are the relationships among the observations, including topology?
    Station numbers were assigned during the survey planning for each SEABOSS survey and may not have been occupied in sequence. Gaps in sequential video station numbers may exist. Feature ID (FID) 157 is labeled as line '38_37" because the target locations for station 37 and 38 were close to each other and it was decided during the survey to make one longer transect over both sites rather than two smaller transects.

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: none
  1. Who distributes the data set? (Distributor 1 of 1)
    Brian Andrews
    U.S. Geological Survey
    Geographer
    384 Woods Hole Rd.
    Woods Hole, MA
    USA

    508-548-8700 x2348 (voice)
    bandrews@usgs.gov
  2. What's the catalog number I need to order this data set? BarnBaySEABOSSTrks.zip: contains BarnBaySEABOSSTrks.shp and the associated shapefile files, BarnBaySEABOSSTrks.jpg browse graphic, and the associated FGDC metadata.
  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?
    This zip file contains data in shapefile format. The user must have software capable of uncompressing the WinZip file and displaying the shapefile.

Who wrote the metadata?

Dates:
Last modified: 20-Jul-2018
Metadata author:
Brian Andrews
U.S. Geological Survey
Geographer
384 Woods Hole Rd.
Woods Hole, MA
USA

508-548-8700 x2348 (voice)
508-457-2310 (FAX)
bandrews@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/eastcoast/midatl/barnegat_bay/BarnBaySEABOSSTrks.faq.html>
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