R/V GYRE cruise 97006 cores (GYRE_CORES.SHP)

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Frequently anticipated questions:

What does this data set describe?

Title: R/V GYRE cruise 97006 cores (GYRE_CORES.SHP)
Abstract:
This GIS data layer is a component of the U.S Geological Survey, Woods Hole Science Center's, Gulf of Mexico GIS database. The Gulf of Mexico GIS database is intended to organize and display USGS held data and provide on-line (WWW) access to the data and/or metadata.
  1. How might this data set be cited?
    Twichell, David, 2005, R/V GYRE cruise 97006 cores (GYRE_CORES.SHP): Open-File Report 2005-1071, 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.

    D.C., Twichell, V.A., Cross, Paskevich, V.F., Hutchinson, D.R., Winters, W.J., and Hart, P.E., 2005, GIS of selected geophysical and core data in the northern Gulf of Mexico continental slope collected by the U.S. Geological Survey: Open-File Report 2005-1071, U.S. Geological Survey, Reston, VA.

    Online Links:

    Other_Citation_Details: 1 DVD-ROM
  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -92.717212
    East_Bounding_Coordinate: -91.920217
    North_Bounding_Coordinate: 27.150218
    South_Bounding_Coordinate: 26.291583
  3. What does it look like?
    http://pubs.usgs.gov/of/2005/1071/data/cores/gyre97/gyre_cores.gif (GIF)
    Image showing the extent and coverage of the data layer.
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 05-Apr-1997
    Ending_Date: 25-Apr-1997
    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):
      • Point (38)
    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?
    gyre_cores
    Shapefile Attribute Table (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.
    COREID
    Core identification is based on a combined character and number scheme. Letters define the type of corer used - GC for gravity corer and PC for piston corer. The number refers to the station number. (Source: USGS) Character string (1-38)
    LAT
    Latitude in degrees and decimal minutes of core location. All cores were collected in the northern hemisphere which is indicated by the N. (Source: USGS) Character string in the form nnDnn.nnnn'N
    LON
    Longitude in degrees and decimal minutes of core location. The W indicates that all longitudes are West. (Source: USGS) Character string in the form nnDnn.nnn'W
    DEPTH
    Measured water depth, in meters, at core location (Source: USGS)
    Range of values
    Minimum:1210
    Maximum:2640
    Units:meters
    Resolution:1
    LENGTH
    core length in centimeters (Source: USGS)
    Range of values
    Minimum:0
    Maximum:470
    Units:centimeters
    Resolution:1
    YEAR
    Year core was collected (Source: USGS) Character string containing the year 1997
    CRUISEID
    Cruise identifier (Source: USGS)
    ValueDefinition
    GYRE97-6R/V GYRE 1997, leg 6
    Character string containing 'GYRE97-6'
    HOTLINK
    Path to image that is linked to core location. (Source: User defined) Character string containing that defines the path to the image linked to the core site.

Who produced the data set?

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

    (508) 548-8700 x 2266 (voice)
    (508) 457-2310 (FAX)
    dtwichell@usgs.gov

Why was the data set created?

This GIS data layer contains a summary of the locations, depths, and lengths of the cores collected aboard the R/V GYRE cruise from 5-25 April 1997 (USGS, Woods Hole Field Activity 97006). The cores were collected from the Louisiana Continental Slope in the Gulf of Mexico along a feature known as Bryant Canyon. 38 cores were collected using either a piston or gravity corer, and cores ranged form 345-470 cm in length. Some of the results have been published by Twichell et al. (2000).

How was the data set created?

  1. From what previous works were the data drawn?
    cores.txt (source 1 of 1)
    Twichell, David, 1997, Summary for field activity 97006.

    Online Links:

    Type_of_Source_Media: disc
    Source_Contribution:
    An ASCII text file listing the core id's, position, depth, and length was attached to the GYRE97006 online cruise report. The text file was edited to create a tabular list that was read into ArcView.
  2. How were the data generated, processed, and modified?
    Date: unknown (process 1 of 7)
    An ASCII text file listing the core identification, position, depth, and length that was attached to the R/V GYRE97006 cruise report was edited to create a tabular list that was read into ArcView. Person who carried out this activity:
    Valerie Paskevich
    U.S. Geological Survey
    Information Specialist / GIS Coordinator
    384 Woods Hole Road
    Woods Hole, MA
    USA

    (508) 548-8700 x 2281 (voice)
    (508) 457-2310 (FAX)
    vpaskevich@usgs.gov
    Data sources used in this process:
    • cores.txt
    Data sources produced in this process:
    • cores.shp
    Date: unknown (process 2 of 7)
    The shapefile was copied from cores.shp to gyre_cores.shp to minimize confusion on shapefile names Person who carried out this activity:
    David Twichell
    US Geological Survey
    Oceanographer
    384 Woods Hole Road
    Woods Hole, MA
    USA

    (508) 548-8700 x 2266 (voice)
    (508) 457-2310 (FAX)
    dtwichell@usgs.gov
    Data sources used in this process:
    • cores.shp
    Data sources produced in this process:
    • gyre_cores.shp
    Date: 12-Feb-2005 (process 3 of 7)
    A field was added to the table for this shapefile that is titled "hotlink", and in this field is the path to images showing summaries of the core descriptions. Person who carried out this activity:
    David Twichell
    U.S. Geological Survey
    Oceanographer
    384 Woods Hole Road
    Woods Hole, MA
    USA

    (508) 548-8700 x 2266 (voice)
    (508) 457-2310 (FAX)
    dtwichell@usgs.gov
    Data sources used in this process:
    • gyre_cores.shp
    Data sources produced in this process:
    • gyre_cores.shp
    Date: 03-Nov-2016 (process 4 of 7)
    Edits to the metadata were made to fix any errors that MP v 2.9.34 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 larger work citation in the Identification_Information section had to be fixed. 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 Road
    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?
    Twichell, D.C., Nelson, C.H., and Damuth, J.E., 2000, Late-stage development of the Bryant Canyon turbidite pathway on the Louisiana continental slope: Deep-water reservoirs of the world Proceedings of the Gulf Coast Section SEPM, SEPM, Tulsa, OK.

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?
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    Core sample information is complete for the entire R/V GYRE 97006 cruise.
  5. How consistent are the relationships among the observations, including topology?
    No additional checks for topological consistency were performed on this data set.

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)
    David Twichell
    U.S. Geological Survey
    Oceanographer
    384 Woods Hole Road
    Woods Hole, MA
    USA

    (508) 548-8700 x 2266 (voice)
    (508) 457-2310 (FAX)
    dtwichell@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?
    Although this dataset has been used by the U.S. Geological Survey (USGS), no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and/or related materials. 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. Reference made to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof.
  4. How can I download or order the data?
    • Availability in digital form:
      Data format: The SHP file contains the geospatial data. The SHX file contains the index of the geospatial data. The DBF file contains the attribute data in dBase format. The PRJ file contains the coordinate system information (optional). The AVL file contains the legend information (optional). The SBN and SBX files contain the spatial index of the geospatial data (optional). The XML file contains the metadata describing the data set <data set name>.shp.xml. An ASCII version of the metadata file. A browse graphic showing the data layer coverage and extent (optional). in format SHP (version 3.3) ESRI point shapefile Size: 0.002
      Network links: http://pubs.usgs.gov/of/2005/1071/data/cores/gyre97/gyre_cores.zip
      Media you can order: DVD-ROM (Density 4.75 Gbytes) (format UDF)
    • Cost to order the data: None

  5. What hardware or software do I need in order to use the data set?
    The 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: 16-Nov-2021
Metadata author:
David Twichell
U.S. Geological Survey
Oceanographer
384 Woods Hole Road
Woods Hole, MA
USA

(508) 548-8700 x 2266 (voice)
(508) 457-2310 (FAX)
whsc_data_contact@usgs.gov
Contact_Instructions:
The metadata contact email address is a generic address in the event the metadata contact is no longer with the USGS or the email is otherwise invalid.
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/ofr2005-1071/gyre_cores.shp.faq.html>
Generated by mp version 2.9.50 on Tue Nov 16 10:06:30 2021