Chirp navigation tracklines collected by Virginia Institute of Marine Science in 2005 along the nearshore region of the northern Outer Banks, NC (nsc2005_tracklines.shp)

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Frequently anticipated questions:


What does this data set describe?

Title:
Chirp navigation tracklines collected by Virginia Institute of Marine Science in 2005 along the nearshore region of the northern Outer Banks, NC (nsc2005_tracklines.shp)
Abstract:
The northeastern North Carolina coastal system, from False Cape, Virginia, to Cape Lookout, North Carolina, has been studied by a cooperative research program that mapped the Quaternary geologic framework of the estuaries, barrier islands, and inner continental shelf. This information provides a basis to understand the linkage between geologic framework, physical processes, and coastal evolution at time scales from storm events to millennia. The study area attracts significant tourism to its parks and beaches, contains a number of coastal communities, and supports a local fishing industry, all of which are impacted by coastal change. Knowledge derived from this research program can be used to mitigate hazards and facilitate effective management of this dynamic coastal system. This regional mapping project produced spatial datasets of high-resolution geophysical (bathymetry, backscatter intensity, and seismic reflection) and sedimentary (core and grab-sample) data. The high-resolution geophysical data were collected during numerous surveys within the back-barrier estuarine system, along the barrier island complex, in the nearshore, and along the inner continental shelf. Sediment cores were taken on the mainland and along the barrier islands, and both cores and grab samples were taken on the inner shelf. Data collection was a collaborative effort between the U.S. Geological Survey (USGS) and several other institutions including East Carolina University (ECU), the North Carolina Geological Survey, and the Virginia Institute of Marine Science (VIMS). The high-resolution geophysical data of the inner continental shelf were collected during six separate surveys conducted between 1999 and 2004 (four USGS surveys north of Cape Hatteras: 1999-045-FA, 2001-005-FA, 2002-012-FA, 2002-013-FA, and two USGS surveys south of Cape Hatteras: 2003-003-FA and 2004-003-FA) and cover more than 2600 square kilometers of the inner shelf. Single-beam bathymetry data were collected north of Cape Hatteras in 1999 using a Furuno fathometer. Swath bathymetry data were collected on all other inner shelf surveys using a SEA, Ltd. SwathPLUS 234-kHz bathymetric sonar. Chirp seismic data as well as sidescan-sonar data were collected with a Teledyne Benthos (Datasonics) SIS-1000 north of Cape Hatteras along with boomer seismic reflection data (cruises 1999-045-FA, 2001-005-FA, 2002-012-FA and 2002-013-FA). An Edgetech 512i was used to collect chirp seismic data south of Cape Hatteras (cruises 2003-003-FA and 2004-003-FA) along with a Klein 3000 sidescan-sonar system. Sediment samples were collected with a Van Veen grab sampler during four of the USGS surveys (1999-045-FA, 2001-005-FA, 2002-013-FA, and 2004-003-FA). Additional sediment core data along the inner shelf are provided from previously published studies. A cooperative study, between the North Carolina Geological Survey and the Minerals Management Service (MMS cores), collected vibracores along the inner continental shelf offshore of Nags Head, Kill Devils Hills and Kitty Hawk, North Carolina in 1996. The U.S. Army Corps of Engineers collected vibracores along the inner shelf offshore of Dare County in August 1995 (NDC cores) and July-August 1995 (SNL cores). These cores are curated by the North Carolina Geological Survey and were used as part of the ground validation process in this study. Nearshore geophysical and core data were collected by the Virginia Institute of Marine Science. The nearshore is defined here as the region between the 10-m isobath and the shoreline. High-resolution bathymetry, backscatter intensity, and chirp seismic data were collected between June 2002 and May 2004. Vibracore samples were collected in May and July 2005. Shallow subsurface geophysical data were acquired along the Outer Banks barrier islands using a ground-penetrating radar (GPR) system. Data were collected by East Carolina University from 2002 to 2005. Rotasonic cores (OBX cores) from five drilling operations were collected from 2002 to 2006 by the North Carolina Geological Survey as part of the cooperative study with the USGS. These cores are distributed throughout the Outer Banks as well as the mainland. The USGS collected seismic data for the Quaternary section within the Albemarle-Pamlico estuarine system between 2001 and 2004 during six surveys (2001-013-FA, 2002-015-FA, 2003-005-FA, 2003-042-FA, 2004-005-FA, and 2004-006-FA). These surveys used Geopulse Boomer and Knudsen Engineering Limited (KEL) 320BR Chirp systems, except cruise 2003-042-FA, which used an Edgetech 424 Chirp and a boomer system. The study area includes Albemarle Sound and selected tributary estuaries such as the South, Pungo, Alligator, and Pasquotank Rivers; Pamlico Sound and trunk estuaries including the Neuse and Pamlico Rivers; and back-barrier sounds including Currituck, Croatan, Roanoke, Core, and Bogue.
Supplemental_Information:
Towfish: Edgetech 512i Acquisition System: SonarWiz FSSB (Chesapeake Technology) Frequency: 0.5 -3.5 kHz and 0.5 - 6 kHz Raw Data Format: SEG-Y SOS: 1500 m/s Survey Vessel: R/V Pelican Survey Layout: The entire survey area was separated into five 10 km shore parallel blocks.
  1. How might this data set be cited?
    McNinch, Dr. Jesse, 2013, Chirp navigation tracklines collected by Virginia Institute of Marine Science in 2005 along the nearshore region of the northern Outer Banks, NC (nsc2005_tracklines.shp): Open-File Report 2011-1015, 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.

    Thieler, E.R., Foster, D.S., Mallinson, D.M., Himmelstoss, E.A., McNinch, J.E., List, J.H., and Hammar-Klose, E.S., 2013, Quaternary Geophysical Framework of the Northeastern North Carolina Coastal System: Open-File Report 2011-1015, U.S. Geological Survey, Reston, VA.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -75.514153
    East_Bounding_Coordinate: -75.449508
    North_Bounding_Coordinate: 35.738464
    South_Bounding_Coordinate: 35.272867
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 07-Jul-2005
    Ending_Date: 08-Jul-2005
    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 (36)
    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?
    nsc2005_tracklines
    Nearshore chirp seismic trackline data (Source: Information unavailable from original metadata.)
    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 segment identification number (Source: U.S. Geological Survey) Information unavailable from original metadata.
    ImageName
    Name of individual seismic JPEG image. This field can be used to hyperlink images to the trackline shapefile in ArcMap. (Source: U.S. Geological Survey) Information unavailable from original metadata.

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Dr. Jesse McNinch
  2. Who also contributed to the data set?
    Pelican Group ~ McNinch Lab at the Virginia Institute of Marine Science
  3. To whom should users address questions about the data?
    Dr. Jesse McNinch
    (formerly) Virginia Institute of Marine Science (currently) US Army Corps of Engineers: Engineer Research and Development Center Field Research Facility
    Director
    USACE-CEERD-HC-F
    Kitty Hawk, NC
    USA

    (252)261-6840 ext 243 (voice)
    Jesse.Mcninch@usace.army.mil

Why was the data set created?

The chirp navigation data were collected by Virginia Institute of Marine Science in 2005 and can be used to relate the seismic profile images with other GIS data.

How was the data set created?

  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
    Date: Jul-2005 (process 1 of 11)
    The seismic shot navigation is received by the Trimble real-time kinematic (RTK) GPS, via Hypack shared memory. It was recorded in the raw SEG-Y header of each file as UTM Zone 18 coordinates (WGS 84). Person who carried out this activity:
    Dr. Jesse McNinch
    (formerly) Virginia Institute of Marine Science (currently) US Army Corps of Engineers: Engineer Research and Development Center Field Research Facility
    Director
    USACE-CEERD-HC-F
    Kitty Hawk, NC
    USA

    (252)261-6840 ext 243 (voice)
    Jesse.Mcninch@usace.army.mil
    Date: 26-Apr-2011 (process 2 of 11)
    The raw SEG-Y data were imported to SonarWiz5.MAP+SBP (ver. 5.03) and navigation files were exported using "Tools" > "CSF" > "Converty CSF to CSV". Person who carried out this activity:
    Dr. Heidi Wadman
    US Army Corps of Engineers: Engineer Research and Development Center Field Research Facility
    Geologist
    USACE-CEERD-HC-F
    Kitty Hawk, NC
    USA

    252-261-6840 x244 (voice)
    Heidi.M.Wadman@usace.army.mil
    Date: 27-Apr-2011 (process 3 of 11)
    The individual .csv files were concatenated into a single file using cygwin. This process step and all subsequent steps were performed by the same person: Emily Himmelstoss Person who carried out this activity:
    Emily Himmelstoss
    U.S. Geological Survey
    Geologist
    384 Woods Hole Road
    Woods Hole, MA
    USA

    508-548-8700 x2262 (voice)
    508-457-2310 (FAX)
    ehimmelstoss@usgs.gov
    Date: 27-Apr-2011 (process 4 of 11)
    The extracted shotpoint data were converted to a point shapefile using the X and Y UTM coordinates within ArcCatalog (v9.1) by right-clicking on the table in the ArcCatalog tree, "Create Feature Class" > "From XY Table" is selected from the pop-up menu. The appropriate x-coordinate and y-coordinate fields are specified in the window dialog and the spatial reference information was defined (UTM 18N, WGS84).
    Date: 27-Apr-2011 (process 5 of 11)
    The point shapefile was converted to a polyline shapefile using an in-house software extension for ArcMap (Trackline Tools v2.6) "Convert Points to Line."
    Date: 27-Apr-2011 (process 6 of 11)
    The ImageName attribute field was added and populated with the names of the individual seismic JPEG images. This field can be used to hyperlink images to the trackline shapefile in ArcMap.
    Date: 27-Apr-2011 (process 7 of 11)
    The trackline shapefile was projected from UTM 18N (WGS 84) to geographic (WGS 84) coordinates using ArcToolbox (v9.3) "Data Management Tools" > "Projections and Transformations" > "Feature" > "Project".
    Date: 15-Jun-2016 (process 8 of 11)
    Edits to the metadata were made to fix any errors that MP v 2.9.32 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 link to the data catalog was fixed. Minor fixes to the attribute format for some attributes were needed. The distribution format name was modified in an attempt to be more consistent with other metadata files of the same data format. 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 9 of 11)
    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 10 of 11)
    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 11 of 11)
    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?

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?
    DGPS is assumed to be accurate within 1-2 meters. Slant-range distance is recorded between the chirp tow vehicle and a sidemount rigged with an acoustic transponder during acquisition of chirp sub-bottom data. Offset between the sidemount and GPS antennae is measured. Basic trigonomic calculations use the slant-range offset to calculate a 'fish'(tow-vehicle) navigation. An assumption in these calculations is that the tow-vehicle is traveling directly behind the vessel; movement to port or starboard is not accounted for within 'fish' navigation. Thus, the horizontal accuracy of the chirp tow-vehicle is +/- 15 meters.
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    These tracklines represent the navigation data for all quality chirp seismic lines collected in the nearshore during Virginia Institute of Marine Science research cruise in 2005. Some lines may have been omitted because they were too short, resulting in gaps in the line number sequence.
  5. How consistent are the relationships among the observations, including topology?
    These navigation data have been stripped from the header of seismic SEG-Y data. They have been quality checked by comparing these data to navigation data acquired during cruise operations.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?
Access_Constraints:
Public domain data are freely redistributable with proper metadata and source attribution. The USGS asks that Dr. Jesse McNinch from the Virginia Institute of Marine Science be referenced as the originator of this dataset in any future products or publications.
Use_Constraints: None
  1. Who distributes the data set? (Distributor 1 of 1)
    E. Robert Thieler
    U.S. Geological Survey
    Research Geologist
    384 Woods Hole Road
    Woods Hole, MA
    USA

    508-548-8700 x2350 (voice)
    508-457-2310 (FAX)
    rthieler@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 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.

Who wrote the metadata?

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

508-548-8700 x2262 (voice)
508-457-2310 (FAX)
ehimmelstoss@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/ofr2011-1015/nsc2005_tracklines.faq.html>
Generated by mp version 2.9.50 on Tue Sep 21 18:20:35 2021