Interpretation of depositional units of the Mississippi Fan

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Frequently anticipated questions:

What does this data set describe?

Title: Interpretation of depositional units of the Mississippi Fan
Abstract:
This GIS layer contains an interpretive layer of depositional units at the edge of the Mississippi Fan.
  1. How might this data set be cited?
    Twichell, D., 20000510, Interpretation of depositional units of the Mississippi Fan: Open-File Report 2000-352, U.S. Geological Survey, Woods Hole Field Center.

    Online Links:

    This is part of the following larger work.

    Paskevich, Valerie F., Twichell, David C., and Schwab, William C., 2000, Seamarc 1A sidescan sonar mosaic, cores and depositional interpretation of the Mississippi Fan: ArcView GIS data release: Open-File Report 2000-352, U.S. Geological Survey, Reston, VA.

    Online Links:

    Other_Citation_Details:
    Suggested citation: Paskevich, V.F., Twichell, D.C., and Schwab, W.C., 2000, Seamarc 1A sidescan sonar mosaic, cores and depositional interpretation of the Mississippi Fan—ArcView GIS data release: U.S. Geological Survey Open-File Report 2000-352, https://doi.org/10.3133/ofr00352.
  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -86.5468
    East_Bounding_Coordinate: -85.0118
    North_Bounding_Coordinate: 26.8299
    South_Bounding_Coordinate: 26.1373
  3. What does it look like?
    https://pubs.usgs.gov/of/2000/of00-352/data/interp/browse/deposits.gif (interpretive map of depositional units at the edge of the Missisippi Fan.)
    GIF
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: 28-Feb-2000
    Currentness_Reference:
    interpretation date
  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):
      • GT-polygon composed of chains (33)
    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?
    interp.dbf
    Shapefile attribute file (Source: none)
    ID
    ID is an ArcView shapefile internal control parameter and has no applicable relevance to the use of the data. (Source: software computed)
    Range of values
    Minimum:0
    Maximum:0
    Intrepreta
    Researcher's interpretation of depositional units of the Mississippi Fan. (Source: interpretive)
    ValueDefinition
    debris flowdebris flow
    dep_01depositional unit 1 - oldest depositional unit at the edge of the fan
    dep_02depositional unit 2
    dep_03depositional unit 3
    dep_04depositional unit 4
    dep_05depositional unit 5
    dep_06depositional unit 6
    dep_07depositional unit 7
    dep_08depositional unit 8
    dep_09depositional unit 9
    dep_10depositional unit 10 - youngest deposited unit
    levee-lineatedlineated portion of the levee
    levee-low-backscatterlow backscatter portion of levee
    levee-mottledmottled portion of levee
    hemipelagichemipelagic sediments deposited beyond the edge of the fan
    dep_undifffan depositional units that are undifferentiated

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • D. Twichell
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
    U.S. Geological Survey
    Attn: David C. Twichell
    Oceanographer
    384 Woods Hole Road
    Woods Hole, MA
    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?
    seamarc.tif (source 1 of 1)
    Twichell(comp.), Dave, Unknown, SeaMARC 1A sidescan sonar mosaic.

    Type_of_Source_Media: disc
    Source_Contribution:
    The SeaMARC 1A sidescan sonar mosaic was registered and viewed in ArcView. The interpretation of depositional units was then interactively drawn over the mosaic to create the ArcView GIS layer.
  2. How were the data generated, processed, and modified?
    Date: 28-Feb-2000 (process 1 of 4)
    The SeaMARC 1A sidescan sonar mosaic was registered and viewed in ArcView. The interpretation of depositional units was then interactively drawn over the mosaic to create the ArcView GIS layer. Person who carried out this activity:
    U.S. Geological Survey
    Attn: Dave Twichell
    Oceanographer
    384 Woods Hole Road
    Woods Hole, MA
    USA

    (508) 548-8700 x2266 (voice)
    (508) 457-2310 (FAX)
    dtwichell@usgs.gov
    Data sources used in this process:
    • seamarc.tif
    Data sources produced in this process:
    • interp.dbf
    • interp.shp
    • interp.shx
    Date: 10-May-2000 (process 2 of 4)
    The data layer, interp.shp, was editted in ArcView to add two additional depositional layers: hemipelagic and dep_undiff. Person who carried out this activity:
    U.S. Geological Survey
    Attn: Dave Twichell
    Oceanographer
    384 Woods Hole Road
    Woods Hole, MA
    USA

    (508) 548-8700 x2266 (voice)
    (508) 457-2310 (FAX)
    dtwichell@usgs.gov
    Data sources used in this process:
    • interp.dbf
    • interp.shp
    • interp.shx
    • seamarc.tif
    Data sources produced in this process:
    • interp.dbf
    • interp.shp
    • interp.shx
    Date: 22-Aug-2023 (process 3 of 4)
    Edited the metadata to remove errors flagged by MP. Filled out the citation information including adding the edition, suggested citation, adding the DOI link and a link to the data page. Added USGS Thesaurus and ISO 19115 Topic Category theme keywords. Added the link to the browse graphic. Removed unrequired elements with a value of "unknown". Indicated in some required elements that information was unavailable from the original metadata. Added links to the source citations. Additional small edits to the metadata were made to be consistent with current standards. Updated the distribution liability to an approved FSP disclaimer statement. Updated the distribution format and provided links to the data removing a redundant digital transfer method. The metadata date was updated, but not the metadata contact. The metadata contact email was updated to a valid link with an explanation in the contact instructions (20230822). The metadata available from a harvester may supersede metadata available from the publication. 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
    USA

    (508) 548-8700 x2251 (voice)
    (508) 457-2310 (FAX)
    vatnipp@usgs.gov
    Date: 06-Aug-2024 (process 4 of 4)
    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?
  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?
    none
  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
    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: interp.shp
  3. What legal disclaimers am I supposed to read?
    Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty.
  4. How can I download or order the data?
    • Availability in digital form:
      Data format: The three ArcView shapefiles (interp.dbf, interp.shp, interp.shx) comprising the interpretation of depositional units of the Mississippi Fan and the ArcView legend file (interp.avl). Available as individual file downloads or in a zip file. in format shapefile Size: 1
      Network links: https://pubs.usgs.gov/of/2000/of00-352/data/interp/interp.zip
      https://pubs.usgs.gov/of/2000/of00-352/htmldocs/shape.htm
      https://doi.org/10.3133/ofr00352
      Media you can order: CD-ROM (Density 650 Mbytes) (format ISO 9600)
      Note: The user must have a system with a CD-ROM capable of reading an ISO-9660 standard CD-ROM disk. To browse the information contained on this disk, the user must also have a current version of WWW browser available. The user must also have the software installed on their computer system capable to unzip the archived file.
    • Cost to order the data: none

  5. What hardware or software do I need in order to use the data set?
    The deposital unit interpretive 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: 06-Aug-2024
Metadata author:
Valerie Paskevich
U. S. Geological Survey
computer specialist
384 Woods Hole Road
Woods Hole, MA
USA

(508) 548-8700 x2281 (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 person is no longer with USGS.
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/ofr2000-352/interp_meta.faq.html>
Generated by mp version 2.9.51 on Tue Aug 6 15:07:13 2024