R/V FARNELLA 90-4 cores

Metadata also available as - [Outline] - [Parseable text]

Frequently-anticipated questions:

What does this data set describe?

Title: R/V FARNELLA 90-4 cores
Abstract:
This ArcView GIS layer contains a summary of the locations, depths, and lengths of the cores collected aboard the R/V FARNELLA 90-4 cruise from 12 -26 April 1990. The cores were collected from the Gulf of Mexico, Mississippi Fan area.
Supplemental_Information:
R/V FARNELLA 90-4 core information is available in three 1) individual ArcView shapefile, 2) Microsoft Excel spreadsheet; and 3) a column formatted ASCII text file.
  1. How should this data set be cited?

    Twichell, David, and Paskevich, Valerie, 20000515, R/V FARNELLA 90-4 cores: U. S. Geological Survey, Woods Hole Field Center.

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -86.4527
    East_Bounding_Coordinate: -84.6444
    North_Bounding_Coordinate: 26.7566
    South_Bounding_Coordinate: 25.2562

  3. What does it look like?

    cores.gif (core locations displayed over SeaMARC 1A sidescan sonar mosaic)
    GIF

  4. Does the data set describe conditions during a particular time period?

    Beginning_Date: 12-Apr-1990
    Ending_Date: 26-Apr-1990
    Currentness_Reference: Publication Date

  5. What is the general form of this data set?

  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 (67)

    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 .0005. Longitudes are given to the nearest .0005. Latitude and longitude values are specified in Decimal degrees.

      The horizontal datum used is North American Datum of 1927.
      The ellipsoid used is Clarke 1866.
      The semi-major axis of the ellipsoid used is 6378206.4.
      The flattening of the ellipsoid used is 1/294.98.

  7. How does the data set describe geographic features?

    cores.dbf
    Shapefile Attribute Table (Source: None)

    Coreid
    Unique identifier assigned to collected core in the field. The core identifier is comprised of two 1) either PC for piston core or GC for gravity cores or GEOTECH for cores collected for geotechnical analysis; and 2) a sequential numeric identifier. (Source: User Defined)

    Character Field

    Lat
    Latitude coordinate in decimal degrees of core location. South latitude recorded as a negative value. (Source: User Defined)

    Character Field

    Lon
    Longitude coordinate in decimal degrees of core location. West longitude recorded as a negative value. (Source: User Defined)

    Character Field

    Depth
    Measured water depth, in meters, at core location. (Source: User Defined)

    Range of values
    Minimum:3060
    Maximum:3410
    Units:meters

    Desc
    Relative pathname to the summary description. The description is stored as a GIF file. This column of the attributes table is intended to be used as a hotlink hyperlink in ArcView. (Source: User Defined)

    Character Field

    HTMLlink
    Relative pathname to the HTML visual description page for the cores that were described. This column of the attributes table is intended to be used as a hotlink in the windows ArcView project. The link will open the core description in the user's default web browser. (Source: User Defined)

    Character Field

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)

  2. Who also contributed to the data set?

  3. To whom should users address questions about the data?

    U.S. Geological Survey
    c/o David C. Twichell
    Oceanographer
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

    (508) 548-8700 x2266 (voice)
    (508) 457-2310 (FAX)
    dtwichell@usgs.gov

Why was the data set created?

This GIS overlay is a component of the U. S Geological Survey, Woods Hole Field Center's, Gulf of Mexico ArcView 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.

How was the data set created?

  1. From what previous works were the data drawn?

    farn90-3_4.txt (source 1 of 1)
    Twichell(comp.), David, Unknown, R/V FARNELLA 90-3 & 90-4 cruise report.

    Type_of_Source_Media: paper
    Source_Contribution:
    An ASCII text file listing the core id's, position, depth and length was attached to the R/V FARNELLA 90-3 & 90-4 post-cruise report. The text file was editted to create a tabular list that was read into ArcView.

  2. How were the data generated, processed, and modified?

    Date: 05-Oct-1999 (process 1 of 2)
    An ASCII text file listing the core id's, position, depth and length was attached to the R/V FARNELLA 90-3 & 90-4 post-cruise report. The text file was editted to create a tabular list that was read into ArcView. Minor editting was done to the table for consistency. A final field, DESC, was added and provides a link to GIF images containing an overview description of some of the cores.

    Person who carried out this activity:

    U.S. Geological Survey
    c/o Valerie Paskevich
    Computer Specialist
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

    (508) 548-8700 x2281 (voice)
    (508) 457-2310 (FAX)
    vpaskevich@usgs.gov

    Data sources used in this process:
    • farn90-3_4.txt

    Data sources produced in this process:

    • cores.dbf
    • cores.shp
    • cores.shx

    Date: 15-May-2000 (process 2 of 2)
    A new field, HTMLlink, was added to the cores.dbf file. This field was edited to include the relative path and filename of the visual description for specific cores. This field is used as a hotlink in the windows arcview project file to open the core description in the web browser.

    Person who carried out this activity:

    U.S. Geological Survey
    c/o Valerie Paskevich
    Computer Specialist
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

    (508) 548-8700 x2281 (voice)
    (508) 457-2310 (FAX)
    vpaskevich@usgs.gov

    Data sources used in this process:
    • cores.dbf
    • cores.shp
    • cores.shx

    Data sources produced in this process:

    • cores.dbf
    • cores.shp
    • cores.shx

  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?

    No report.

  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 FARNELLA 90-4 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:
Although this derived data set and it's lineage dataset have been used by the 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. The U.S. Geological Survey must be referenced as the originator of the dataset in any future products or research derived from these data.

  1. Who distributes the data set? (Distributor 1 of 1)

    David Twichell
    U.S. Geological Survey
    oceanographer
    384 Woods Hole Road
    Woods Hole, MA 02543-1598
    USA

    (508) 548-8700 x2266 (voice)
    (508) 457-2310 (FAX)
    dtwichell@usgs.gov

  2. What's the catalog number I need to order this data set?

    Mississippi Fan: cores.shp

  3. What legal disclaimers am I supposed to read?

    Although this derived data set and it's lineage dataset have been used by the 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.

  4. How can I download or order the data?

  5. What hardware or software do I need in order to use the data set?

    The R/V FARNELLA 90-4 core location overlay is available in an ArcView shapefile format. The user must have ESRI's ArcView 3.0 or greater software to read and process the data file. In lieu of Arcview, the user may utilize another GIS application package capable of importing the data.

Who wrote the metadata?

Dates:
Last modified: 15-May-2000
Metadata author:
Valerie Paskevich
U. S. Geological Survey
computer specialist
384 Woods Hole Road
Woods Hole, MA 02543-1598
USA

(508) 548-8700 x2281 (voice)
(508) 457-2310 (FAX)
vpaskevich@usgs.gov

Metadata standard:
FGDC Content Standards for Digital Geospatial (FGDC-STD-001-1998)

Generated by mp version 2.8.24 on Mon Mar 27 19:53:56 2006