Shot-Point Navigation for the Boomer High-Resolution Seismic-Reflection Profiles Collected During U.S. Geological Survey (USGS) R/V Rafael Cruise 08034 off Edgartown, Massachusetts (08034_BOOMERNAV.SHP)

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Frequently anticipated questions:


What does this data set describe?

Title:
Shot-Point Navigation for the Boomer High-Resolution Seismic-Reflection Profiles Collected During U.S. Geological Survey (USGS) R/V Rafael Cruise 08034 off Edgartown, Massachusetts (08034_BOOMERNAV.SHP)
Abstract:
The U.S. Geological Survey (USGS), in cooperation with the National Oceanic and Atmospheric Administration (NOAA) and the Massachusetts Office of Coastal Zone Management (MA CZM), is producing detailed geologic maps of the coastal sea floor. Imagery, originally collected by NOAA for charting purposes, provides a fundamental framework for research and management activities along this part of the Massachusetts coastline, shows the composition and terrain of the seabed, and provides information on sediment transport and benthic habitat. Interpretive data layers were derived from the combined single-beam and multibeam echo-sounder data and sidescan-sonar data collected in the vicinity of Edgartown Harbor, Massachusetts. During August 2008 seismic-reflection profiles (Boomer and Chirp) were acquired, and during September 2008 bottom photographs and surficial sediment data were acquired as part of two ground-truth reconnaissance surveys.
  1. How might this data set be cited?
    Poppe, Larry, 2009, Shot-Point Navigation for the Boomer High-Resolution Seismic-Reflection Profiles Collected During U.S. Geological Survey (USGS) R/V Rafael Cruise 08034 off Edgartown, Massachusetts (08034_BOOMERNAV.SHP): Open-File Report 2009-1001, 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.

    Poppe, L.J., McMullen, K.Y., Foster, D.S., Blackwood, D.S., Williams, S.J., Ackerman, S.D., Moser, M.S., and Glomb, K.A., 2010, Geological Interpretation of the Sea Floor Offshore of Edgartown, Massachusetts: Open-File Report 2009-1001, U.S. Geological Survey, Reston, VA.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -70.548292
    East_Bounding_Coordinate: -70.434536
    North_Bounding_Coordinate: 41.454708
    South_Bounding_Coordinate: 41.385917
  3. What does it look like?
    http://pubs.usgs.gov/of/2009/1001/data/seismic/boomer/nav/08034_boomernav.gif (GIF)
    Browse graphic showing location of boomer high-resolution seismic-reflection profiles collected during RV Rafael cruise 08034.
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: 20-Aug-2008
    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 Point data set. It contains the following vector data types (SDTS terminology):
      • Entity point (11171)
    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.
      Vertical_Coordinate_System_Definition:
      Depth_System_Definition:
      Depth_Datum_Name: Local surface
      Depth_Resolution: 0.001
      Depth_Distance_Units: milliseconds
      Depth_Encoding_Method: Implicit coordinate
  7. How does the data set describe geographic features?
    08034_boomernav
    Shapefile (Source: ESRI)
    FID
    Internal feature number. (Source: ESRI) Sequential unique whole numbers that are automatically generated.
    Shape
    Feature geometry. (Source: ESRI) Coordinates defining the features.
    Line
    Line (file) name (Source: Processor)
    ValueDefinition
    Line-0001Line designation
    Line-0002Line designation
    Line-0003Line designation
    Line-0004Line designation
    Line-0005Line designation
    Shot
    Shot point number (Source: Processor)
    Range of values
    Minimum:1
    Maximum:7185
    Units:shot point
    Resolution:1
    Long
    Longitude coordinate, WGS84 (Source: Processor)
    Range of values
    Minimum:-70.548292
    Maximum:-70.434536
    Units:decimal degrees
    Resolution:0.000001
    Lat
    Latitude coordinate, WGS84 (Source: Processor)
    Range of values
    Minimum:41.385917
    Maximum:41.454708
    Units:decimal degrees
    Resolution:0.000001
    Year
    Year data were acquired (Source: Processor)
    ValueDefinition
    2008year
    Day
    Julian day data were acquired (Source: Processor)
    ValueDefinition
    233Julian day
    Hour
    Hour the data were acquired, UTC (Source: Processor)
    Range of values
    Minimum:14
    Maximum:18
    Units:hours
    Resolution:1
    Min
    Minute data were acquired, UTC (Source: Processor)
    Range of values
    Minimum:0
    Maximum:59
    Units:minutes
    Resolution:1
    Sec
    Second data were acquired, UTC (Source: Processor)
    Range of values
    Minimum:0
    Maximum:59
    Units:seconds
    Resolution:1
    Entity_and_Attribute_Overview:
    This data set includes the shot-point navigation for boomer seismic-reflection data collected along five lines in the vicinity of Edgartown Harbor, offshore Massachusetts. The seismic data were collected during USGS survey 08034, conducted August 20, 2008. Navigation went down between 16:08:06 and 16:12:13, so line file 3 is interpolated.
    Entity_and_Attribute_Detail_Citation: <http://www.seg.org/publications/tech-stand/seg_y_rev1.pdf>

Who produced the data set?

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

    508-548-8700 x2314 (voice)
    508-457-2310 (FAX)
    lpoppe@usgs.gov

Why was the data set created?

To release the shot-point navigation data for the Boomer seismic-reflection data collected along five lines in the vicinity of Edgartown Harbor, offshore Massachusetts in geographic, WGS84. The Boomer data were collected to interpret the deeper stratigraphy beneath Edgartown Harbor.

How was the data set created?

  1. From what previous works were the data drawn?
    The source information was incomplete and had to be modified to meet the standard. (source 1 of 1)
    U.S. Geological Survey, Unpublished Material, 08034 Boomer navigation.

    Type_of_Source_Media: disc
    Source_Contribution: The original Boomer navigation data.
  2. How were the data generated, processed, and modified?
    Date: 20-Aug-2008 (process 1 of 7)
    High-resolution Boomer seismic-reflection data were collected August 20 aboard the Research Vessel Rafael. The seismic data were acquired digitally along 5 lines totaling approximately 27.6 km with a GeoAcoustics Boomer source, GeoAcoustics power supply, Benthos AQ4 single-channel streamer, and Chesapeake Systems SonarWiz v4.03.0089 acquisition software. The Boomer was fired at a rate of 0.5 seconds at a power output of 175 joules. The received signal was filtered between 100-3000 Hz with a GeoPulse receiver. The trace data recorded for 266 ms with a sample rate of 0.533 ms in standard SEG-Y format. Person who carried out this activity:
    David Foster
    U.S. Geological Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, MA
    USA

    508-548-8700 x2271 (voice)
    508-457-2310 (FAX)
    dfoster@usgs.gov
    Date: 20-Aug-2008 (process 2 of 7)
    A script was run that used Seismic Unix 4.0 to read the SEG-Y files and extract shot number, horizontal position, year, day, and time of day from the header. AWK was used to parse the ASCII data and convert position in seconds of arc to decimal degrees. The ASCII file was filtered using Linux "sort" to keep only the unique horizontal positions output to a comma-delimited text file. Person who carried out this activity:
    David Foster
    U.S. Geological Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, MA
    USA

    508-548-8700 x2271 (voice)
    508-457-2310 (FAX)
    dfoster@usgs.gov
    Data sources produced in this process:
    • 08034_boomernav.csv
    Date: 19-Aug-2009 (process 3 of 7)
    The ASCII comma-delimited shot-point navigation data were imported and converted to a shapefile using the create feature class using X-Y table in ArcCatalog 9.2 and the coordinate system and datum were defined as geographic, WGS84. Person who carried out this activity:
    Dave Foster
    U.S. Geological Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, MA

    508-548-8700 x2271 (voice)
    508-457-2310 (FAX)
    dfoster@usgs.gov
    Data sources used in this process:
    • 08034_boomernav.csv
    Data sources produced in this process:
    • 08034_boomernav.shp
    Date: 02-Mar-2016 (process 4 of 7)
    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. 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 5 of 7)
    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 6 of 7)
    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 7 of 7)
    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?
    O'Hara, C.J., and Oldale, R.N., 1987, Maps showing the geology, shallow structure, and bedform morphology of Nantucket Sound, Massachusetts: Miscellaneous Field Studies Map MF-1911, U.S. Geological Survey, Coastal and Marine Geology Program, USGS Woods Hole Coastal and Marine Science Center, Woods Hole, MA.

    Poppe, L.J., McMullen, K.Y., Foster, D.S., Blackwood, D.S., Williams, S.J., Ackerman, S.D., Barnum, S.R., and Brennan, R.T., 2008, Sea-floor character and sedimentary processes in the vicinity of Woods Hole, Massachusetts: Open-File Report 2008-1004, 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?
    All attributes were checked in a consistent manner.
  2. How accurate are the geographic locations?
    Horizontal_Positional_Accuracy_Report: Navigation was by DGPS; positional accuracy to less than 10 m. The Boomer source was towed astern and to the port side of the RV Rafael on the water surface. The single-channel hydrophone streamer was towed astern and to the starboard side and approximately 0.5 meters below the water surface. The layback offset was accounted for in the positional data recorded in the SEG-Y headers. The layback position was 8 meters aft of the vessel. Navigation went down between 16:08:06 and 16:12:13, so line file 3 is interpolated.
  3. How accurate are the heights or depths?
    The vertical position was local sea level and there have been no corrections to a datum or for tidal variations.
  4. Where are the gaps in the data? What is missing?
    All available trackline data along Boomer seismic acquisition lines collected during the RV Rafael cruise 08034 is included in this data set. There is no navigation for line 3 between shot points 794 and 1449. For this segment of line 3, the line is a linear interpolation between shots 794 and 1449.
  5. How consistent are the relationships among the observations, including topology?
    No additional checks for consistency were performed on this data.

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 (USGS) as the source of this information.
  1. Who distributes the data set? (Distributor 1 of 1)
    Larry Poppe
    U.S. Geological Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, MA
    USA

    508-548-8700 x2314 (voice)
    508-457-2310 (FAX)
    lpoppe@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 the National Oceanic and Atmospheric Administration (NOAA), 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 or NOAA 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 in Environmental Systems Research Institute (ESRI) shapefile format. The user must have ArcGIS or ArcView 3.0 or greater software to read and process the data file. In lieu of ArcView or ArcGIS, the user may utilize another GIS application package capable of importing data. A free data viewer, ArcExplorer, capable of displaying the data is available from ESRI at www.esri.com. The user must have software capable of uncompressing archived zip files, such as WinZip or Pkware.

Who wrote the metadata?

Dates:
Last modified: 08-Sep-2020
Metadata author:
David Foster
U.S. Geological Survey
Geologist
384 Woods Hole Road
Woods Hole, MA
USA

508-548-8700 x2271 (voice)
508-457-2310 (FAX)
dfoster@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/ofr2009-1001/08034_boomernav.shp.faq.html>
Generated by mp version 2.9.50 on Tue Sep 21 18:20:24 2021